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diff --git a/gcc-4.4.0/gcc/ada/sinfo.ads b/gcc-4.4.0/gcc/ada/sinfo.ads new file mode 100644 index 000000000..21d3f4063 --- /dev/null +++ b/gcc-4.4.0/gcc/ada/sinfo.ads @@ -0,0 +1,11423 @@ +------------------------------------------------------------------------------ +-- -- +-- GNAT COMPILER COMPONENTS -- +-- -- +-- S I N F O -- +-- -- +-- S p e c -- +-- -- +-- Copyright (C) 1992-2009, Free Software Foundation, Inc. -- +-- -- +-- GNAT is free software; you can redistribute it and/or modify it under -- +-- terms of the GNU General Public License as published by the Free Soft- -- +-- ware Foundation; either version 3, or (at your option) any later ver- -- +-- sion. GNAT is distributed in the hope that it will be useful, but WITH- -- +-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY -- +-- or FITNESS FOR A PARTICULAR PURPOSE. -- +-- -- +-- As a special exception under Section 7 of GPL version 3, you are granted -- +-- additional permissions described in the GCC Runtime Library Exception, -- +-- version 3.1, as published by the Free Software Foundation. -- +-- -- +-- You should have received a copy of the GNU General Public License and -- +-- a copy of the GCC Runtime Library Exception along with this program; -- +-- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see -- +-- <http://www.gnu.org/licenses/>. -- +-- -- +-- GNAT was originally developed by the GNAT team at New York University. -- +-- Extensive contributions were provided by Ada Core Technologies Inc. -- +-- -- +------------------------------------------------------------------------------ + +-- This package defines the structure of the abstract syntax tree. The Tree +-- package provides a basic tree structure. Sinfo describes how this structure +-- is used to represent the syntax of an Ada program. + +-- The grammar in the RM is followed very closely in the tree +-- design, and is repeated as part of this source file. + +-- The tree contains not only the full syntactic representation of the +-- program, but also the results of semantic analysis. In particular, the +-- nodes for defining identifiers, defining character literals and defining +-- operator symbols, collectively referred to as entities, represent what +-- would normally be regarded as the symbol table information. In addition a +-- number of the tree nodes contain semantic information. + +-- WARNING: Several files are automatically generated from this package. +-- See below for details. + +with Namet; use Namet; +with Types; use Types; +with Uintp; use Uintp; +with Urealp; use Urealp; + +package Sinfo is + + --------------------------------- + -- Making Changes to This File -- + --------------------------------- + + -- If changes are made to this file, a number of related steps must be + -- carried out to ensure consistency. First, if a field access function is + -- added, it appears in seven places: + + -- The documentation associated with the node + -- The spec of the access function in sinfo.ads + -- The body of the access function in sinfo.adb + -- The pragma Inline at the end of sinfo.ads for the access function + -- The spec of the set procedure in sinfo.ads + -- The body of the set procedure in sinfo.adb + -- The pragma Inline at the end of sinfo.ads for the set procedure + + -- The field chosen must be consistent in all places, and, for a node that + -- is a subexpression, must not overlap any of the standard expression + -- fields. + + -- In addition, if any of the standard expression fields is changed, then + -- the utility program which creates the Treeprs spec (in file treeprs.ads) + -- must be updated appropriately, since it special cases expression fields. + + -- If a new tree node is added, then the following changes are made + + -- Add it to the documentation in the appropriate place + -- Add its fields to this documentation section + -- Define it in the appropriate classification in Node_Kind + -- In the body (sinfo), add entries to the access functions for all + -- its fields (except standard expression fields) to include the new + -- node in the checks. + -- Add an appropriate section to the case statement in sprint.adb + -- Add an appropriate section to the case statement in sem.adb + -- Add an appropriate section to the case statement in exp_util.adb + -- (Insert_Actions procedure) + -- For a subexpression, add an appropriate section to the case + -- statement in sem_eval.adb + -- For a subexpression, add an appropriate section to the case + -- statement in sem_res.adb + + -- Finally, four utility programs must be run: + + -- Run CSinfo to check that you have made the changes consistently. It + -- checks most of the rules given above, with clear error messages. This + -- utility reads sinfo.ads and sinfo.adb and generates a report to + -- standard output. + + -- Run XSinfo to create sinfo.h, the corresponding C header. This + -- utility reads sinfo.ads and generates sinfo.h. Note that it does + -- not need to read sinfo.adb, since the contents of the body are + -- algorithmically determinable from the spec. + + -- Run XTreeprs to create treeprs.ads, an updated version of the module + -- that is used to drive the tree print routine. This utility reads (but + -- does not modify) treeprs.adt, the template that provides the basic + -- structure of the file, and then fills in the data from the comments + -- in sinfo.ads. + + -- Run XNmake to create nmake.ads and nmake.adb, the package body and + -- spec of the Nmake package which contains functions for constructing + -- nodes. + + -- All of the above steps except CSinfo are done automatically by the + -- build scripts when you do a full bootstrap. + + -- Note: sometime we could write a utility that actually generated the body + -- of sinfo from the spec instead of simply checking it, since, as noted + -- above, the contents of the body can be determined from the spec. + + -------------------------------- + -- Implicit Nodes in the Tree -- + -------------------------------- + + -- Generally the structure of the tree very closely follows the grammar as + -- defined in the RM. However, certain nodes are omitted to save space and + -- simplify semantic processing. Two general classes of such omitted nodes + -- are as follows: + + -- If the only possibilities for a non-terminal are one or more other + -- non-terminals (i.e. the rule is a "skinny" rule), then usually the + -- corresponding node is omitted from the tree, and the target construct + -- appears directly. For example, a real type definition is either + -- floating point definition or a fixed point definition. No explicit node + -- appears for real type definition. Instead either the floating point + -- definition or fixed point definition appears directly. + + -- If a non-terminal corresponds to a list of some other non-terminal + -- (possibly with separating punctuation), then usually it is omitted from + -- the tree, and a list of components appears instead. For example, + -- sequence of statements does not appear explicitly in the tree. Instead + -- a list of statements appears directly. + + -- Some additional cases of omitted nodes occur and are documented + -- individually. In particular, many nodes are omitted in the tree + -- generated for an expression. + + ------------------------------------------- + -- Handling of Defining Identifier Lists -- + ------------------------------------------- + + -- In several declarative forms in the syntax, lists of defining + -- identifiers appear (object declarations, component declarations, number + -- declarations etc.) + + -- The semantics of such statements are equivalent to a series of identical + -- declarations of single defining identifiers (except that conformance + -- checks require the same grouping of identifiers in the parameter case). + + -- To simplify semantic processing, the parser breaks down such multiple + -- declaration cases into sequences of single declarations, duplicating + -- type and initialization information as required. The flags More_Ids and + -- Prev_Ids are used to record the original form of the source in the case + -- where the original source used a list of names, More_Ids being set on + -- all but the last name and Prev_Ids being set on all but the first name. + -- These flags are used to reconstruct the original source (e.g. in the + -- Sprint package), and also are included in the conformance checks, but + -- otherwise have no semantic significance. + + -- Note: the reason that we use More_Ids and Prev_Ids rather than + -- First_Name and Last_Name flags is so that the flags are off in the + -- normal one identifier case, which minimizes tree print output. + + ----------------------- + -- Use of Node Lists -- + ----------------------- + + -- With a few exceptions, if a construction of the form {non-terminal} + -- appears in the tree, lists are used in the corresponding tree node (see + -- package Nlists for handling of node lists). In this case a field of the + -- parent node points to a list of nodes for the non-terminal. The field + -- name for such fields has a plural name which always ends in "s". For + -- example, a case statement has a field Alternatives pointing to list of + -- case statement alternative nodes. + + -- Only fields pointing to lists have names ending in "s", so generally the + -- structure is strongly typed, fields not ending in s point to single + -- nodes, and fields ending in s point to lists. + + -- The following example shows how a traversal of a list is written. We + -- suppose here that Stmt points to a N_Case_Statement node which has a + -- list field called Alternatives: + + -- Alt := First (Alternatives (Stmt)); + -- while Present (Alt) loop + -- .. + -- -- processing for case statement alternative Alt + -- .. + -- Alt := Next (Alt); + -- end loop; + + -- The Present function tests for Empty, which in this case signals the end + -- of the list. First returns Empty immediately if the list is empty. + -- Present is defined in Atree, First and Next are defined in Nlists. + + -- The exceptions to this rule occur with {DEFINING_IDENTIFIERS} in all + -- contexts, which is handled as described in the previous section, and + -- with {,library_unit_NAME} in the N_With_Clause mode, which is handled + -- using the First_Name and Last_Name flags, as further detailed in the + -- description of the N_With_Clause node. + + ------------- + -- Pragmas -- + ------------- + + -- Pragmas can appear in many different context, but are not included in + -- the grammar. Still they must appear in the tree, so they can be properly + -- processed. + + -- Two approaches are used. In some cases, an extra field is defined in an + -- appropriate node that contains a list of pragmas appearing in the + -- expected context. For example pragmas can appear before an + -- Accept_Alternative in a Selective_Accept_Statement, and these pragmas + -- appear in the Pragmas_Before field of the N_Accept_Alternative node. + + -- The other approach is to simply allow pragmas to appear in syntactic + -- lists where the grammar (of course) does not include the possibility. + -- For example, the Variants field of an N_Variant_Part node points to a + -- list that can contain both N_Pragma and N_Variant nodes. + + -- To make processing easier in the latter case, the Nlists package + -- provides a set of routines (First_Non_Pragma, Last_Non_Pragma, + -- Next_Non_Pragma, Prev_Non_Pragma) that allow such lists to be handled + -- ignoring all pragmas. + + -- In the case of the variants list, we can either write: + + -- Variant := First (Variants (N)); + -- while Present (Variant) loop + -- ... + -- Variant := Next (Variant); + -- end loop; + + -- or + + -- Variant := First_Non_Pragma (Variants (N)); + -- while Present (Variant) loop + -- ... + -- Variant := Next_Non_Pragma (Variant); + -- end loop; + + -- In the first form of the loop, Variant can either be an N_Pragma or an + -- N_Variant node. In the second form, Variant can only be N_Variant since + -- all pragmas are skipped. + + --------------------- + -- Optional Fields -- + --------------------- + + -- Fields which correspond to a section of the syntax enclosed in square + -- brackets are generally omitted (and the corresponding field set to Empty + -- for a node, or No_List for a list). The documentation of such fields + -- notes these cases. One exception to this rule occurs in the case of + -- possibly empty statement sequences (such as the sequence of statements + -- in an entry call alternative). Such cases appear in the syntax rules as + -- [SEQUENCE_OF_STATEMENTS] and the fields corresponding to such optional + -- statement sequences always contain an empty list (not No_List) if no + -- statements are present. + + -- Note: the utility program that constructs the body and spec of the Nmake + -- package relies on the format of the comments to determine if a field + -- should have a default value in the corresponding make routine. The rule + -- is that if the first line of the description of the field contains the + -- string "(set to xxx if", then a default value of xxx is provided for + -- this field in the corresponding Make_yyy routine. + + ----------------------------------- + -- Note on Body/Spec Terminology -- + ----------------------------------- + + -- In informal discussions about Ada, it is customary to refer to package + -- and subprogram specs and bodies. However, this is not technically + -- correct, what is normally referred to as a spec or specification is in + -- fact a package declaration or subprogram declaration. We are careful in + -- GNAT to use the correct terminology and in particular, the full word + -- specification is never used as an incorrect substitute for declaration. + -- The structure and terminology used in the tree also reflects the grammar + -- and thus uses declaration and specification in the technically correct + -- manner. + + -- However, there are contexts in which the informal terminology is useful. + -- We have the word "body" to refer to the Interp_Etype declared by the + -- declaration of a unit body, and in some contexts we need similar term to + -- refer to the entity declared by the package or subprogram declaration, + -- and simply using declaration can be confusing since the body also has a + -- declaration. + + -- An example of such a context is the link between the package body and + -- its declaration. With_Declaration is confusing, since the package body + -- itself is a declaration. + + -- To deal with this problem, we reserve the informal term Spec, i.e. the + -- popular abbreviation used in this context, to refer to the entity + -- declared by the package or subprogram declaration. So in the above + -- example case, the field in the body is called With_Spec. + + -- Another important context for the use of the word Spec is in error + -- messages, where a hyper-correct use of declaration would be confusing to + -- a typical Ada programmer, and even for an expert programmer can cause + -- confusion since the body has a declaration as well. + + -- So, to summarize: + + -- Declaration always refers to the syntactic entity that is called + -- a declaration. In particular, subprogram declaration + -- and package declaration are used to describe the + -- syntactic entity that includes the semicolon. + + -- Specification always refers to the syntactic entity that is called + -- a specification. In particular, the terms procedure + -- specification, function specification, package + -- specification, subprogram specification always refer + -- to the syntactic entity that has no semicolon. + + -- Spec is an informal term, used to refer to the entity + -- that is declared by a task declaration, protected + -- declaration, generic declaration, subprogram + -- declaration or package declaration. + + -- This convention is followed throughout the GNAT documentation + -- both internal and external, and in all error message text. + + ------------------------ + -- Internal Use Nodes -- + ------------------------ + + -- These are Node_Kind settings used in the internal implementation which + -- are not logically part of the specification. + + -- N_Unused_At_Start + -- Completely unused entry at the start of the enumeration type. This + -- is inserted so that no legitimate value is zero, which helps to get + -- better debugging behavior, since zero is a likely uninitialized value). + + -- N_Unused_At_End + -- Completely unused entry at the end of the enumeration type. This is + -- handy so that arrays with Node_Kind as the index type have an extra + -- entry at the end (see for example the use of the Pchar_Pos_Array in + -- Treepr, where the extra entry provides the limit value when dealing with + -- the last used entry in the array). + + ----------------------------------------- + -- Note on the settings of Sloc fields -- + ----------------------------------------- + + -- The Sloc field of nodes that come from the source is set by the parser. + -- For internal nodes, and nodes generated during expansion the Sloc is + -- usually set in the call to the constructor for the node. In general the + -- Sloc value chosen for an internal node is the Sloc of the source node + -- whose processing is responsible for the expansion. For example, the Sloc + -- of an inherited primitive operation is the Sloc of the corresponding + -- derived type declaration. + + -- For the nodes of a generic instantiation, the Sloc value is encoded to + -- represent both the original Sloc in the generic unit, and the Sloc of + -- the instantiation itself. See Sinput.ads for details. + + -- Subprogram instances create two callable entities: one is the visible + -- subprogram instance, and the other is an anonymous subprogram nested + -- within a wrapper package that contains the renamings for the actuals. + -- Both of these entities have the Sloc of the defining entity in the + -- instantiation node. This simplifies some ASIS queries. + + ----------------------- + -- Field Definitions -- + ----------------------- + + -- In the following node definitions, all fields, both syntactic and + -- semantic, are documented. The one exception is in the case of entities + -- (defining identifiers, character literals and operator symbols), where + -- the usage of the fields depends on the entity kind. Entity fields are + -- fully documented in the separate package Einfo. + + -- In the node definitions, three common sets of fields are abbreviated to + -- save both space in the documentation, and also space in the string + -- (defined in Tree_Print_Strings) used to print trees. The following + -- abbreviations are used: + + -- Note: the utility program that creates the Treeprs spec (in the file + -- xtreeprs.adb) knows about the special fields here, so it must be + -- modified if any change is made to these fields. + + -- "plus fields for binary operator" + -- Chars (Name1) Name_Id for the operator + -- Left_Opnd (Node2) left operand expression + -- Right_Opnd (Node3) right operand expression + -- Entity (Node4-Sem) defining entity for operator + -- Associated_Node (Node4-Sem) for generic processing + -- Do_Overflow_Check (Flag17-Sem) set if overflow check needed + -- Has_Private_View (Flag11-Sem) set in generic units. + + -- "plus fields for unary operator" + -- Chars (Name1) Name_Id for the operator + -- Right_Opnd (Node3) right operand expression + -- Entity (Node4-Sem) defining entity for operator + -- Associated_Node (Node4-Sem) for generic processing + -- Do_Overflow_Check (Flag17-Sem) set if overflow check needed + -- Has_Private_View (Flag11-Sem) set in generic units. + + -- "plus fields for expression" + -- Paren_Count number of parentheses levels + -- Etype (Node5-Sem) type of the expression + -- Is_Overloaded (Flag5-Sem) >1 type interpretation exists + -- Is_Static_Expression (Flag6-Sem) set for static expression + -- Raises_Constraint_Error (Flag7-Sem) evaluation raises CE + -- Must_Not_Freeze (Flag8-Sem) set if must not freeze + -- Do_Range_Check (Flag9-Sem) set if a range check needed + -- Assignment_OK (Flag15-Sem) set if modification is OK + -- Is_Controlling_Actual (Flag16-Sem) set for controlling argument + + -- Note: see under (EXPRESSION) for further details on the use of + -- the Paren_Count field to record the number of parentheses levels. + + -- Node_Kind is the type used in the Nkind field to indicate the node kind. + -- The actual definition of this type is given later (the reason for this + -- is that we want the descriptions ordered by logical chapter in the RM, + -- but the type definition is reordered to facilitate the definition of + -- some subtype ranges. The individual descriptions of the nodes show how + -- the various fields are used in each node kind, as well as providing + -- logical names for the fields. Functions and procedures are provided for + -- accessing and setting these fields using these logical names. + + ----------------------- + -- Gigi Restrictions -- + ----------------------- + + -- The tree passed to Gigi is more restricted than the general tree form. + -- For example, as a result of expansion, most of the tasking nodes can + -- never appear. For each node to which either a complete or partial + -- restriction applies, a note entitled "Gigi restriction" appears which + -- documents the restriction. + + -- Note that most of these restrictions apply only to trees generated when + -- code is being generated, since they involved expander actions that + -- destroy the tree. + + ------------------------ + -- Common Flag Fields -- + ------------------------ + + -- The following flag fields appear in all nodes + + -- Analyzed (Flag1) + -- This flag is used to indicate that a node (and all its children have + -- been analyzed. It is used to avoid reanalysis of a node that has + -- already been analyzed, both for efficiency and functional correctness + -- reasons. + + -- Comes_From_Source (Flag2) + -- This flag is on for any nodes built by the scanner or parser from the + -- source program, and off for any nodes built by the analyzer or + -- expander. It indicates that a node comes from the original source. + -- This flag is defined in Atree. + + -- Error_Posted (Flag3) + -- This flag is used to avoid multiple error messages being posted on or + -- referring to the same node. This flag is set if an error message + -- refers to a node or is posted on its source location, and has the + -- effect of inhibiting further messages involving this same node. + + -- Has_Dynamic_Length_Check (Flag10-Sem) + -- This flag is present on all nodes. It is set to indicate that one of + -- the routines in unit Checks has generated a length check action which + -- has been inserted at the flagged node. This is used to avoid the + -- generation of duplicate checks. + + -- Has_Dynamic_Range_Check (Flag12-Sem) + -- This flag is present on all nodes. It is set to indicate that one of + -- the routines in unit Checks has generated a range check action which + -- has been inserted at the flagged node. This is used to avoid the + -- generation of duplicate checks. + + -- Has_Local_Raise (Flag8-Sem) + -- Present in exception handler nodes. Set if the handler can be entered + -- via a local raise that gets transformed to a goto statement. This will + -- always be set if Local_Raise_Statements is non-empty, but can also be + -- set as a result of generation of N_Raise_xxx nodes, or flags set in + -- nodes requiring generation of back end checks. + + ------------------------------------ + -- Description of Semantic Fields -- + ------------------------------------ + + -- The meaning of the syntactic fields is generally clear from their names + -- without any further description, since the names are chosen to + -- correspond very closely to the syntax in the reference manual. This + -- section describes the usage of the semantic fields, which are used to + -- contain additional information determined during semantic analysis. + + -- ABE_Is_Certain (Flag18-Sem) + -- This flag is set in an instantiation node or a call node is determined + -- to be sure to raise an ABE. This is used to trigger special handling + -- of such cases, particularly in the instantiation case where we avoid + -- instantiating the body if this flag is set. This flag is also present + -- in an N_Formal_Package_Declaration_Node since formal package + -- declarations are treated like instantiations, but it is always set to + -- False in this context. + + -- Accept_Handler_Records (List5-Sem) + -- This field is present only in an N_Accept_Alternative node. It is used + -- to temporarily hold the exception handler records from an accept + -- statement in a selective accept. These exception handlers will + -- eventually be placed in the Handler_Records list of the procedure + -- built for this accept (see Expand_N_Selective_Accept procedure in + -- Exp_Ch9 for further details). + + -- Access_Types_To_Process (Elist2-Sem) + -- Present in N_Freeze_Entity nodes for Incomplete or private types. + -- Contains the list of access types which may require specific treatment + -- when the nature of the type completion is completely known. An example + -- of such treatment is the generation of the associated_final_chain. + + -- Actions (List1-Sem) + -- This field contains a sequence of actions that are associated with the + -- node holding the field. See the individual node types for details of + -- how this field is used, as well as the description of the specific use + -- for a particular node type. + + -- Activation_Chain_Entity (Node3-Sem) + -- This is used in tree nodes representing task activators (blocks, + -- subprogram bodies, package declarations, and task bodies). It is + -- initially Empty, and then gets set to point to the entity for the + -- declared Activation_Chain variable when the first task is declared. + -- When tasks are declared in the corresponding declarative region this + -- entity is located by name (its name is always _Chain) and the declared + -- tasks are added to the chain. Note that N_Extended_Return_Statement + -- does not have this attribute, although it does have an activation + -- chain. This chain is used to store the tasks temporarily, and is not + -- used for activating them. On successful completion of the return + -- statement, the tasks are moved to the caller's chain, and the caller + -- activates them. + + -- Acts_As_Spec (Flag4-Sem) + -- A flag set in the N_Subprogram_Body node for a subprogram body which + -- is acting as its own spec, except in the case of a library level + -- subprogram, in which case the flag is set on the parent compilation + -- unit node instead (see further description in spec of Lib package). + -- ??? Above note about Lib is dubious since lib.ads does not mention + -- Acts_As_Spec at all. + + -- Actual_Designated_Subtype (Node4-Sem) + -- Present in N_Free_Statement and N_Explicit_Dereference nodes. If gigi + -- needs to known the dynamic constrained subtype of the designated + -- object, this attribute is set to that type. This is done for + -- N_Free_Statements for access-to-classwide types and access to + -- unconstrained packed array types, and for N_Explicit_Dereference when + -- the designated type is an unconstrained packed array and the + -- dereference is the prefix of a 'Size attribute reference. + + -- Address_Warning_Posted (Flag18-Sem) + -- Present in N_Attribute_Definition nodes. Set to indicate that we have + -- posted a warning for the address clause regarding size or alignment + -- issues. Used to inhibit multiple redundant messages. + + -- Aggregate_Bounds (Node3-Sem) + -- Present in array N_Aggregate nodes. If the aggregate contains + -- component associations this field points to an N_Range node whose + -- bounds give the lowest and highest discrete choice values. If the + -- named aggregate contains a dynamic or null choice this field is empty. + -- If the aggregate contains positional elements this field points to an + -- N_Integer_Literal node giving the number of positional elements. Note + -- that if the aggregate contains positional elements and an other choice + -- the N_Integer_Literal only accounts for the number of positional + -- elements. + + -- All_Others (Flag11-Sem) + -- Present in an N_Others_Choice node. This flag is set for an others + -- exception where all exceptions are to be caught, even those that are + -- not normally handled (in particular the tasking abort signal). This + -- is used for translation of the at end handler into a normal exception + -- handler. + + -- Assignment_OK (Flag15-Sem) + -- This flag is set in a subexpression node for an object, indicating + -- that the associated object can be modified, even if this would not + -- normally be permissible (either by direct assignment, or by being + -- passed as an out or in-out parameter). This is used by the expander + -- for a number of purposes, including initialization of constants and + -- limited type objects (such as tasks), setting discriminant fields, + -- setting tag values, etc. N_Object_Declaration nodes also have this + -- flag defined. Here it is used to indicate that an initialization + -- expression is valid, even where it would normally not be allowed + -- (e.g. where the type involved is limited). + + -- Associated_Node (Node4-Sem) + -- Present in nodes that can denote an entity: identifiers, character + -- literals, operator symbols, expanded names, operator nodes, and + -- attribute reference nodes (all these nodes have an Entity field). + -- This field is also present in N_Aggregate, N_Selected_Component, and + -- N_Extension_Aggregate nodes. This field is used in generic processing + -- to create links between the generic template and the generic copy. + -- See Sem_Ch12.Get_Associated_Node for full details. Note that this + -- field overlaps Entity, which is fine, since, as explained in Sem_Ch12, + -- the normal function of Entity is not required at the point where the + -- Associated_Node is set. Note also, that in generic templates, this + -- means that the Entity field does not necessarily point to an Entity. + -- Since the back end is expected to ignore generic templates, this is + -- harmless. + + -- At_End_Proc (Node1) + -- This field is present in an N_Handled_Sequence_Of_Statements node. + -- It contains an identifier reference for the cleanup procedure to be + -- called. See description of this node for further details. + + -- Backwards_OK (Flag6-Sem) + -- A flag present in the N_Assignment_Statement node. It is used only + -- if the type being assigned is an array type, and is set if analysis + -- determines that it is definitely safe to do the copy backwards, i.e. + -- starting at the highest addressed element. Note that if neither of the + -- flags Forwards_OK or Backwards_OK is set, it means that the front end + -- could not determine that either direction is definitely safe, and a + -- runtime check may be required if the backend cannot figure it out. + + -- Body_To_Inline (Node3-Sem) + -- present in subprogram declarations. Denotes analyzed but unexpanded + -- body of subprogram, to be used when inlining calls. Present when the + -- subprogram has an Inline pragma and inlining is enabled. If the + -- declaration is completed by a renaming_as_body, and the renamed en- + -- tity is a subprogram, the Body_To_Inline is the name of that entity, + -- which is used directly in later calls to the original subprogram. + + -- Body_Required (Flag13-Sem) + -- A flag that appears in the N_Compilation_Unit node indicating that + -- the corresponding unit requires a body. For the package case, this + -- indicates that a completion is required. In Ada 95, if the flag is not + -- set for the package case, then a body may not be present. In Ada 83, + -- if the flag is not set for the package case, then body is optional. + -- For a subprogram declaration, the flag is set except in the case where + -- a pragma Import or Interface applies, in which case no body is + -- permitted (in Ada 83 or Ada 95). + + -- By_Ref (Flag5-Sem) + -- Present in N_Simple_Return_Statement and N_Extended_Return_Statement, + -- this flag is set when the returned expression is already allocated on + -- the secondary stack and thus the result is passed by reference rather + -- than copied another time. + + -- Check_Address_Alignment (Flag11-Sem) + -- A flag present in N_Attribute_Definition clause for a 'Address + -- attribute definition. This flag is set if a dynamic check should be + -- generated at the freeze point for the entity to which this address + -- clause applies. The reason that we need this flag is that we want to + -- check for range checks being suppressed at the point where the + -- attribute definition clause is given, rather than testing this at the + -- freeze point. + + -- Coextensions (Elist4-Sem) + -- Present in allocators nodes. Points to list of allocators for the + -- access discriminants of the allocated object. + + -- Comes_From_Extended_Return_Statement (Flag18-Sem) + -- Present in N_Simple_Return_Statement nodes. True if this node was + -- constructed as part of the N_Extended_Return_Statement expansion. + -- . + + -- Compile_Time_Known_Aggregate (Flag18-Sem) + -- Present in N_Aggregate nodes. Set for aggregates which can be fully + -- evaluated at compile time without raising constraint error. Such + -- aggregates can be passed as is to Gigi without any expansion. See + -- Sem_Aggr for the specific conditions under which an aggregate has this + -- flag set. See also the flag Static_Processing_OK. + + -- Condition_Actions (List3-Sem) + -- This field appears in else-if nodes and in the iteration scheme node + -- for while loops. This field is only used during semantic processing to + -- temporarily hold actions inserted into the tree. In the tree passed + -- to gigi, the condition actions field is always set to No_List. For + -- details on how this field is used, see the routine Insert_Actions in + -- package Exp_Util, and also the expansion routines for the relevant + -- nodes. + + -- Controlling_Argument (Node1-Sem) + -- This field is set in procedure and function call nodes if the call + -- is a dispatching call (it is Empty for a non-dispatching call). It + -- indicates the source of the call's controlling tag. For procedure + -- calls, the Controlling_Argument is one of the actuals. For function + -- that has a dispatching result, it is an entity in the context of the + -- call that can provide a tag, or else it is the tag of the root type + -- of the class. It can also specify a tag directly rather than being a + -- tagged object. The latter is needed by the implementations of AI-239 + -- and AI-260. + + -- Conversion_OK (Flag14-Sem) + -- A flag set on type conversion nodes to indicate that the conversion + -- is to be considered as being valid, even though it is the case that + -- the conversion is not valid Ada. This is used for attributes Enum_Rep, + -- Fixed_Value and Integer_Value, for internal conversions done for + -- fixed-point operations, and for certain conversions for calls to + -- initialization procedures. If Conversion_OK is set, then Etype must be + -- set (the analyzer assumes that Etype has been set). For the case of + -- fixed-point operands, it also indicates that the conversion is to be + -- direct conversion of the underlying integer result, with no regard to + -- the small operand. + + -- Corresponding_Body (Node5-Sem) + -- This field is set in subprogram declarations, package declarations, + -- entry declarations of protected types, and in generic units. It + -- points to the defining entity for the corresponding body (NOT the + -- node for the body itself). + + -- Corresponding_Formal_Spec (Node3-Sem) + -- This field is set in subprogram renaming declarations, where it points + -- to the defining entity for a formal subprogram in the case where the + -- renaming corresponds to a generic formal subprogram association in an + -- instantiation. The field is Empty if the renaming does not correspond + -- to such a formal association. + + -- Corresponding_Generic_Association (Node5-Sem) + -- This field is defined for object declarations and object renaming + -- declarations. It is set for the declarations within an instance that + -- map generic formals to their actuals. If set, the field points to + -- a generic_association which is the original parent of the expression + -- or name appearing in the declaration. This simplifies ASIS queries. + + -- Corresponding_Integer_Value (Uint4-Sem) + -- This field is set in real literals of fixed-point types (it is not + -- used for floating-point types). It contains the integer value used + -- to represent the fixed-point value. It is also set on the universal + -- real literals used to represent bounds of fixed-point base types + -- and their first named subtypes. + + -- Corresponding_Spec (Node5-Sem) + -- This field is set in subprogram, package, task, and protected body + -- nodes, where it points to the defining entity in the corresponding + -- spec. The attribute is also set in N_With_Clause nodes where it points + -- to the defining entity for the with'ed spec, and in a subprogram + -- renaming declaration when it is a Renaming_As_Body. The field is Empty + -- if there is no corresponding spec, as in the case of a subprogram body + -- that serves as its own spec. + + -- Corresponding_Stub (Node3-Sem) + -- This field is present in an N_Subunit node. It holds the node in + -- the parent unit that is the stub declaration for the subunit. It is + -- set when analysis of the stub forces loading of the proper body. If + -- expansion of the proper body creates new declarative nodes, they are + -- inserted at the point of the corresponding_stub. + + -- Dcheck_Function (Node5-Sem) + -- This field is present in an N_Variant node, It references the entity + -- for the discriminant checking function for the variant. + + -- Debug_Statement (Node3) + -- This field is present in an N_Pragma node. It is used only for a Debug + -- pragma. The parameter is of the form of an expression, as required by + -- the pragma syntax, but is actually a procedure call. To simplify + -- semantic processing, the parser creates a copy of the argument + -- rearranged into a procedure call statement and places it in the + -- Debug_Statement field. Note that this field is considered syntactic + -- field, since it is created by the parser. + + -- Default_Expression (Node5-Sem) + -- This field is Empty if there is no default expression. If there is a + -- simple default expression (one with no side effects), then this field + -- simply contains a copy of the Expression field (both point to the tree + -- for the default expression). Default_Expression is used for + -- conformance checking. + + -- Discr_Check_Funcs_Built (Flag11-Sem) + -- This flag is present in N_Full_Type_Declaration nodes. It is set when + -- discriminant checking functions are constructed. The purpose is to + -- avoid attempting to set these functions more than once. + + -- Do_Accessibility_Check (Flag13-Sem) + -- This flag is set on N_Parameter_Specification nodes to indicate + -- that an accessibility check is required for the parameter. It is + -- not yet decided who takes care of this check (TBD ???). + + -- Do_Discriminant_Check (Flag13-Sem) + -- This flag is set on N_Selected_Component nodes to indicate that a + -- discriminant check is required using the discriminant check routine + -- associated with the selector. The actual check is generated by the + -- expander when processing selected components. + + -- Do_Division_Check (Flag13-Sem) + -- This flag is set on a division operator (/ mod rem) to indicate + -- that a zero divide check is required. The actual check is dealt + -- with by the backend (all the front end does is to set the flag). + + -- Do_Length_Check (Flag4-Sem) + -- This flag is set in an N_Assignment_Statement, N_Op_And, N_Op_Or, + -- N_Op_Xor, or N_Type_Conversion node to indicate that a length check + -- is required. It is not determined who deals with this flag (???). + + -- Do_Overflow_Check (Flag17-Sem) + -- This flag is set on an operator where an overflow check is required on + -- the operation. The actual check is dealt with by the backend (all the + -- front end does is to set the flag). The other cases where this flag is + -- used is on a Type_Conversion node and for attribute reference nodes. + -- For a type conversion, it means that the conversion is from one base + -- type to another, and the value may not fit in the target base type. + -- See also the description of Do_Range_Check for this case. The only + -- attribute references which use this flag are Pred and Succ, where it + -- means that the result should be checked for going outside the base + -- range. + + -- Do_Range_Check (Flag9-Sem) + -- This flag is set on an expression which appears in a context where a + -- range check is required. The target type is clear from the context. + -- The contexts in which this flag can appear are the following: + + -- Right side of an assignment. In this case the target type is + -- taken from the left side of the assignment, which is referenced + -- by the Name of the N_Assignment_Statement node. + + -- Subscript expressions in an indexed component. In this case the + -- target type is determined from the type of the array, which is + -- referenced by the Prefix of the N_Indexed_Component node. + + -- Argument expression for a parameter, appearing either directly in + -- the Parameter_Associations list of a call or as the Expression of an + -- N_Parameter_Association node that appears in this list. In either + -- case, the check is against the type of the formal. Note that the + -- flag is relevant only in IN and IN OUT parameters, and will be + -- ignored for OUT parameters, where no check is required in the call, + -- and if a check is required on the return, it is generated explicitly + -- with a type conversion. + + -- Initialization expression for the initial value in an object + -- declaration. In this case the Do_Range_Check flag is set on + -- the initialization expression, and the check is against the + -- range of the type of the object being declared. + + -- The expression of a type conversion. In this case the range check is + -- against the target type of the conversion. See also the use of + -- Do_Overflow_Check on a type conversion. The distinction is that the + -- overflow check protects against a value that is outside the range of + -- the target base type, whereas a range check checks that the + -- resulting value (which is a value of the base type of the target + -- type), satisfies the range constraint of the target type. + + -- Note: when a range check is required in contexts other than those + -- listed above (e.g. in a return statement), an additional type + -- conversion node is introduced to represent the required check. + + -- Do_Storage_Check (Flag17-Sem) + -- This flag is set in an N_Allocator node to indicate that a storage + -- check is required for the allocation, or in an N_Subprogram_Body node + -- to indicate that a stack check is required in the subprogram prolog. + -- The N_Allocator case is handled by the routine that expands the call + -- to the runtime routine. The N_Subprogram_Body case is handled by the + -- backend, and all the semantics does is set the flag. + + -- Do_Tag_Check (Flag13-Sem) + -- This flag is set on an N_Assignment_Statement, N_Function_Call, + -- N_Procedure_Call_Statement, N_Type_Conversion, + -- N_Simple_Return_Statement, or N_Extended_Return_Statement + -- node to indicate that the tag check can be suppressed. It is not + -- yet decided how this flag is used (TBD ???). + + -- Elaborate_Present (Flag4-Sem) + -- This flag is set in the N_With_Clause node to indicate that pragma + -- Elaborate pragma appears for the with'ed units. + + -- Elaborate_All_Desirable (Flag9-Sem) + -- This flag is set in the N_With_Clause mode to indicate that the static + -- elaboration processing has determined that an Elaborate_All pragma is + -- desirable for correct elaboration for this unit. + + -- Elaborate_All_Present (Flag14-Sem) + -- This flag is set in the N_With_Clause node to indicate that a + -- pragma Elaborate_All pragma appears for the with'ed units. + + -- Elaborate_Desirable (Flag11-Sem) + -- This flag is set in the N_With_Clause mode to indicate that the static + -- elaboration processing has determined that an Elaborate pragma is + -- desirable for correct elaboration for this unit. + + -- Elaboration_Boolean (Node2-Sem) + -- This field is present in function and procedure specification nodes. + -- If set, it points to the entity for a Boolean flag that must be tested + -- for certain calls to check for access before elaboration. See body of + -- Sem_Elab for further details. This field is Empty if no elaboration + -- boolean is required. + + -- Else_Actions (List3-Sem) + -- This field is present in conditional expression nodes. During code + -- expansion we use the Insert_Actions procedure (in Exp_Util) to insert + -- actions at an appropriate place in the tree to get elaborated at the + -- right time. For conditional expressions, we have to be sure that the + -- actions for the Else branch are only elaborated if the condition is + -- False. The Else_Actions field is used as a temporary parking place for + -- these actions. The final tree is always rewritten to eliminate the + -- need for this field, so in the tree passed to Gigi, this field is + -- always set to No_List. + + -- Enclosing_Variant (Node2-Sem) + -- This field is present in the N_Variant node and identifies the Node_Id + -- corresponding to the immediately enclosing variant when the variant is + -- nested, and N_Empty otherwise. Set during semantic processing of the + -- variant part of a record type. + + -- Entity (Node4-Sem) + -- Appears in all direct names (identifiers, character literals, and + -- operator symbols), as well as expanded names, and attributes that + -- denote entities, such as 'Class. Points to entity for corresponding + -- defining occurrence. Set after name resolution. For identifiers in a + -- WITH list, the corresponding defining occurrence is in a separately + -- compiled file, and Entity must be set by the library Load procedure. + -- + -- Note: During name resolution, the value in Entity may be temporarily + -- incorrect (e.g. during overload resolution, Entity is initially set to + -- the first possible correct interpretation, and then later modified if + -- necessary to contain the correct value after resolution). + -- + -- Note: This field overlaps Associated_Node, which is used during + -- generic processing (see Sem_Ch12 for details). Note also that in + -- generic templates, this means that the Entity field does not always + -- point to an Entity. Since the back end is expected to ignore generic + -- templates, this is harmless. + -- + -- Note: This field also appears in N_Attribute_Definition_Clause nodes. + -- It is used only for stream attributes definition clauses. In this + -- case, it denotes a (possibly dummy) subprogram entity that is declared + -- conceptually at the point of the clause. Thus the visibility of the + -- attribute definition clause (in the sense of 8.3(23) as amended by + -- AI-195) can be checked by testing the visibility of that subprogram. + -- + -- Note: Normally the Entity field of an identifier points to the entity + -- for the corresponding defining identifier, and hence the Chars field + -- of an identifier will match the Chars field of the entity. However, + -- there is no requirement that these match, and there are obscure cases + -- of generated code where they do not match. + + -- Entity_Or_Associated_Node (Node4-Sem) + -- A synonym for both Entity and Associated_Node. Used by convention in + -- the code when referencing this field in cases where it is not known + -- whether the field contains an Entity or an Associated_Node. + + -- Etype (Node5-Sem) + -- Appears in all expression nodes, all direct names, and all entities. + -- Points to the entity for the related type. Set after type resolution. + -- Normally this is the actual subtype of the expression. However, in + -- certain contexts such as the right side of an assignment, subscripts, + -- arguments to calls, returned value in a function, initial value etc. + -- it is the desired target type. In the event that this is different + -- from the actual type, the Do_Range_Check flag will be set if a range + -- check is required. Note: if the Is_Overloaded flag is set, then Etype + -- points to an essentially arbitrary choice from the possible set of + -- types. + + -- Exception_Junk (Flag8-Sem) + -- This flag is set in a various nodes appearing in a statement sequence + -- to indicate that the corresponding node is an artifact of the + -- generated code for exception handling, and should be ignored when + -- analyzing the control flow of the relevant sequence of statements + -- (e.g. to check that it does not end with a bad return statement). + + -- Exception_Label (Node5-Sem) + -- Appears in N_Push_xxx_Label nodes. Points to the entity of the label + -- to be used for transforming the corresponding exception into a goto, + -- or contains Empty, if this exception is not to be transformed. Also + -- appears in N_Exception_Handler nodes, where, if set, it indicates + -- that there may be a local raise for the handler, so that expansion + -- to allow a goto is required (and this field contains the label for + -- this goto). See Exp_Ch11.Expand_Local_Exception_Handlers for details. + + -- Expansion_Delayed (Flag11-Sem) + -- Set on aggregates and extension aggregates that need a top-down rather + -- than bottom up expansion. Typically aggregate expansion happens bottom + -- up. For nested aggregates the expansion is delayed until the enclosing + -- aggregate itself is expanded, e.g. in the context of a declaration. To + -- delay it we set this flag. This is done to avoid creating a temporary + -- for each level of a nested aggregates, and also to prevent the + -- premature generation of constraint checks. This is also a requirement + -- if we want to generate the proper attachment to the internal + -- finalization lists (for record with controlled components). Top down + -- expansion of aggregates is also used for in-place array aggregate + -- assignment or initialization. When the full context is known, the + -- target of the assignment or initialization is used to generate the + -- left-hand side of individual assignment to each sub-component. + + -- First_Inlined_Subprogram (Node3-Sem) + -- Present in the N_Compilation_Unit node for the main program. Points + -- to a chain of entities for subprograms that are to be inlined. The + -- Next_Inlined_Subprogram field of these entities is used as a link + -- pointer with Empty marking the end of the list. This field is Empty + -- if there are no inlined subprograms or inlining is not active. + + -- First_Named_Actual (Node4-Sem) + -- Present in procedure call statement and function call nodes, and also + -- in Intrinsic nodes. Set during semantic analysis to point to the first + -- named parameter where parameters are ordered by declaration order (as + -- opposed to the actual order in the call which may be different due to + -- named associations). Note: this field points to the explicit actual + -- parameter itself, not the N_Parameter_Association node (its parent). + + -- First_Real_Statement (Node2-Sem) + -- Present in N_Handled_Sequence_Of_Statements node. Normally set to + -- Empty. Used only when declarations are moved into the statement part + -- of a construct as a result of wrapping an AT END handler that is + -- required to cover the declarations. In this case, this field is used + -- to remember the location in the statements list of the first real + -- statement, i.e. the statement that used to be first in the statement + -- list before the declarations were prepended. + + -- First_Subtype_Link (Node5-Sem) + -- Present in N_Freeze_Entity node for an anonymous base type that is + -- implicitly created by the declaration of a first subtype. It points + -- to the entity for the first subtype. + + -- Float_Truncate (Flag11-Sem) + -- A flag present in type conversion nodes. This is used for float to + -- integer conversions where truncation is required rather than rounding. + -- Note that Gigi does not handle type conversions from real to integer + -- with rounding (see Expand_N_Type_Conversion). + + -- Forwards_OK (Flag5-Sem) + -- A flag present in the N_Assignment_Statement node. It is used only + -- if the type being assigned is an array type, and is set if analysis + -- determines that it is definitely safe to do the copy forwards, i.e. + -- starting at the lowest addressed element. Note that if neither of the + -- flags Forwards_OK or Backwards_OK is set, it means that the front end + -- could not determine that either direction is definitely safe, and a + -- runtime check is required. + + -- From_At_End (Flag4-Sem) + -- This flag is set on an N_Raise_Statement node if it corresponds to + -- the reraise statement generated as the last statement of an AT END + -- handler when SJLJ exception handling is active. It is used to stop + -- a bogus violation of restriction (No_Exception_Propagation), bogus + -- because if the restriction is set, the reraise is not generated. + + -- From_At_Mod (Flag4-Sem) + -- This flag is set on the attribute definition clause node that is + -- generated by a transformation of an at mod phrase in a record + -- representation clause. This is used to give slightly different (Ada 83 + -- compatible) semantics to such a clause, namely it is used to specify a + -- minimum acceptable alignment for the base type and all subtypes. In + -- Ada 95 terms, the actual alignment of the base type and all subtypes + -- must be a multiple of the given value, and the representation clause + -- is considered to be type specific instead of subtype specific. + + -- From_Default (Flag6-Sem) + -- This flag is set on the subprogram renaming declaration created in an + -- instance for a formal subprogram, when the formal is declared with a + -- box, and there is no explicit actual. If the flag is present, the + -- declaration is treated as an implicit reference to the formal in the + -- ali file. + + -- Generic_Parent (Node5-Sem) + -- Generic_Parent is defined on declaration nodes that are instances. The + -- value of Generic_Parent is the generic entity from which the instance + -- is obtained. Generic_Parent is also defined for the renaming + -- declarations and object declarations created for the actuals in an + -- instantiation. The generic parent of such a declaration is the + -- corresponding generic association in the Instantiation node. + + -- Generic_Parent_Type (Node4-Sem) + -- Generic_Parent_Type is defined on Subtype_Declaration nodes for the + -- actuals of formal private and derived types. Within the instance, the + -- operations on the actual are those inherited from the parent. For a + -- formal private type, the parent type is the generic type itself. The + -- Generic_Parent_Type is also used in an instance to determine whether a + -- private operation overrides an inherited one. + + -- Handler_List_Entry (Node2-Sem) + -- This field is present in N_Object_Declaration nodes. It is set only + -- for the Handler_Record entry generated for an exception in zero cost + -- exception handling mode. It references the corresponding item in the + -- handler list, and is used to delete this entry if the corresponding + -- handler is deleted during optimization. For further details on why + -- this is required, see Exp_Ch11.Remove_Handler_Entries. + + -- Has_No_Elaboration_Code (Flag17-Sem) + -- A flag that appears in the N_Compilation_Unit node to indicate whether + -- or not elaboration code is present for this unit. It is initially set + -- true for subprogram specs and bodies and for all generic units and + -- false for non-generic package specs and bodies. Gigi may set the flag + -- in the non-generic package case if it determines that no elaboration + -- code is generated. Note that this flag is not related to the + -- Is_Preelaborated status, there can be preelaborated packages that + -- generate elaboration code, and non-preelaborated packages which do + -- not generate elaboration code. + + -- Has_Priority_Pragma (Flag6-Sem) + -- A flag present in N_Subprogram_Body, N_Task_Definition and + -- N_Protected_Definition nodes to flag the presence of either a Priority + -- or Interrupt_Priority pragma in the declaration sequence (public or + -- private in the task and protected cases) + + -- Has_Private_View (Flag11-Sem) + -- A flag present in generic nodes that have an entity, to indicate that + -- the node has a private type. Used to exchange private and full + -- declarations if the visibility at instantiation is different from the + -- visibility at generic definition. + + -- Has_Relative_Deadline_Pragma (Flag9-Sem) + -- A flag present in N_Subprogram_Body and N_Task_Definition nodes to + -- flag the presence of a pragma Relative_Deadline. + + -- Has_Self_Reference (Flag13-Sem) + -- Present in N_Aggregate and N_Extension_Aggregate. Indicates that one + -- of the expressions contains an access attribute reference to the + -- enclosing type. Such a self-reference can only appear in default- + -- initialized aggregate for a record type. + + -- Has_Storage_Size_Pragma (Flag5-Sem) + -- A flag present in an N_Task_Definition node to flag the presence of a + -- Storage_Size pragma. + + -- Has_Task_Info_Pragma (Flag7-Sem) + -- A flag present in an N_Task_Definition node to flag the presence of a + -- Task_Info pragma. Used to detect duplicate pragmas. + + -- Has_Task_Name_Pragma (Flag8-Sem) + -- A flag present in N_Task_Definition nodes to flag the presence of a + -- Task_Name pragma in the declaration sequence for the task. + + -- Has_Wide_Character (Flag11-Sem) + -- Present in string literals, set if any wide character (i.e. character + -- code outside the Character range) appears in the string. + + -- Hidden_By_Use_Clause (Elist4-Sem) + -- An entity list present in use clauses that appear within + -- instantiations. For the resolution of local entities, entities + -- introduced by these use clauses have priority over global ones, and + -- outer entities must be explicitly hidden/restored on exit. + + -- Implicit_With (Flag16-Sem) + -- This flag is set in the N_With_Clause node that is implicitly + -- generated for runtime units that are loaded by the expander, and also + -- for package System, if it is loaded implicitly by a use of the + -- 'Address or 'Tag attribute. + + -- Includes_Infinities (Flag11-Sem) + -- This flag is present in N_Range nodes. It is set for the range of + -- unconstrained float types defined in Standard, which include not only + -- the given range of values, but also legitimately can include infinite + -- values. This flag is false for any float type for which an explicit + -- range is given by the programmer, even if that range is identical to + -- the range for Float. + + -- Instance_Spec (Node5-Sem) + -- This field is present in generic instantiation nodes, and also in + -- formal package declaration nodes (formal package declarations are + -- treated in a manner very similar to package instantiations). It points + -- to the node for the spec of the instance, inserted as part of the + -- semantic processing for instantiations in Sem_Ch12. + + -- Is_Asynchronous_Call_Block (Flag7-Sem) + -- A flag set in a Block_Statement node to indicate that it is the + -- expansion of an asynchronous entry call. Such a block needs cleanup + -- handler to assure that the call is cancelled. + + -- Is_Component_Left_Opnd (Flag13-Sem) + -- Is_Component_Right_Opnd (Flag14-Sem) + -- Present in concatenation nodes, to indicate that the corresponding + -- operand is of the component type of the result. Used in resolving + -- concatenation nodes in instances. + + -- Is_Controlling_Actual (Flag16-Sem) + -- This flag is set on in an expression that is a controlling argument in + -- a dispatching call. It is off in all other cases. See Sem_Disp for + -- details of its use. + + -- Is_Dynamic_Coextension (Flag18-Sem) + -- Present in allocator nodes, to indicate that this is an allocator + -- for an access discriminant of a dynamically allocated object. The + -- coextension must be deallocated and finalized at the same time as + -- the enclosing object. + + -- Is_Entry_Barrier_Function (Flag8-Sem) + -- This flag is set in an N_Subprogram_Body node which is the expansion + -- of an entry barrier from a protected entry body. It is used for the + -- circuitry checking for incorrect use of Current_Task. + + -- Is_Expanded_Build_In_Place_Call (Flag11-Sem) + -- This flag is set in an N_Function_Call node to indicate that the extra + -- actuals to support a build-in-place style of call have been added to + -- the call. + + -- Is_In_Discriminant_Check (Flag11-Sem) + -- This flag is present in a selected component, and is used to indicate + -- that the reference occurs within a discriminant check. The + -- significance is that optimizations based on assuming that the + -- discriminant check has a correct value cannot be performed in this + -- case (or the discriminant check may be optimized away!) + + -- Is_Machine_Number (Flag11-Sem) + -- This flag is set in an N_Real_Literal node to indicate that the value + -- is a machine number. This avoids some unnecessary cases of converting + -- real literals to machine numbers. + + -- Is_Null_Loop (Flag16-Sem) + -- This flag is set in an N_Loop_Statement node if the corresponding loop + -- can be determined to be null at compile time. This is used to suppress + -- any warnings that would otherwise be issued inside the loop since they + -- are probably not useful. + + -- Is_Overloaded (Flag5-Sem) + -- A flag present in all expression nodes. Used temporarily during + -- overloading determination. The setting of this flag is not relevant + -- once overloading analysis is complete. + + -- Is_Power_Of_2_For_Shift (Flag13-Sem) + -- A flag present only in N_Op_Expon nodes. It is set when the + -- exponentiation is of the form 2 ** N, where the type of N is an + -- unsigned integral subtype whose size does not exceed the size of + -- Standard_Integer (i.e. a type that can be safely converted to + -- Natural), and the exponentiation appears as the right operand of an + -- integer multiplication or an integer division where the dividend is + -- unsigned. It is also required that overflow checking is off for both + -- the exponentiation and the multiply/divide node. If this set of + -- conditions holds, and the flag is set, then the division or + -- multiplication can be (and is) converted to a shift. + + -- Is_Protected_Subprogram_Body (Flag7-Sem) + -- A flag set in a Subprogram_Body block to indicate that it is the + -- implementation of a protected subprogram. Such a body needs cleanup + -- handler to make sure that the associated protected object is unlocked + -- when the subprogram completes. + + -- Is_Static_Coextension (Flag14-Sem) + -- Present in N_Allocator nodes. Set if the allocator is a coextension + -- of an object allocated on the stack rather than the heap. + + -- Is_Static_Expression (Flag6-Sem) + -- Indicates that an expression is a static expression (RM 4.9). See spec + -- of package Sem_Eval for full details on the use of this flag. + + -- Is_Subprogram_Descriptor (Flag16-Sem) + -- Present in N_Object_Declaration, and set only for the object + -- declaration generated for a subprogram descriptor in fast exception + -- mode. See Exp_Ch11 for details of use. + + -- Is_Task_Allocation_Block (Flag6-Sem) + -- A flag set in a Block_Statement node to indicate that it is the + -- expansion of a task allocator, or the allocator of an object + -- containing tasks. Such a block requires a cleanup handler to call + -- Expunge_Unactivated_Tasks to complete any tasks that have been + -- allocated but not activated when the allocator completes abnormally. + + -- Is_Task_Master (Flag5-Sem) + -- A flag set in a Subprogram_Body, Block_Statement or Task_Body node to + -- indicate that the construct is a task master (i.e. has declared tasks + -- or declares an access to a task type). + + -- Itype (Node1-Sem) + -- Used in N_Itype_Reference node to reference an itype for which it is + -- important to ensure that it is defined. See description of this node + -- for further details. + + -- Kill_Range_Check (Flag11-Sem) + -- Used in an N_Unchecked_Type_Conversion node to indicate that the + -- result should not be subjected to range checks. This is used for the + -- implementation of Normalize_Scalars. + + -- Label_Construct (Node2-Sem) + -- Used in an N_Implicit_Label_Declaration node. Refers to an N_Label, + -- N_Block_Statement or N_Loop_Statement node to which the label + -- declaration applies. This is not currently used in the compiler + -- itself, but it is useful in the implementation of ASIS queries. + -- This field is left empty for the special labels generated as part + -- of expanding raise statements with a local exception handler. + + -- Library_Unit (Node4-Sem) + -- In a stub node, Library_Unit points to the compilation unit node of + -- the corresponding subunit. + -- + -- In a with clause node, Library_Unit points to the spec of the with'ed + -- unit. + -- + -- In a compilation unit node, the usage depends on the unit type: + -- + -- For a subprogram body, Library_Unit points to the compilation unit + -- node of the corresponding spec, unless Acts_As_Spec is set, in which + -- case it points to itself. + -- + -- For a package body, Library_Unit points to the compilation unit of + -- the corresponding package spec. + -- + -- For a subprogram spec to which pragma Inline applies, Library_Unit + -- points to the compilation unit node of the corresponding body, if + -- inlining is active. + -- + -- For a generic declaration, Library_Unit points to the compilation + -- unit node of the corresponding generic body. + -- + -- For a subunit, Library_Unit points to the compilation unit node of + -- the parent body. + -- + -- Note that this field is not used to hold the parent pointer for child + -- unit (which might in any case need to use it for some other purpose as + -- described above). Instead for a child unit, implicit with's are + -- generated for all parents. + + -- Local_Raise_Statements (Elist1) + -- This field is present in exception handler nodes. It is set to + -- No_Elist in the normal case. If there is at least one raise statement + -- which can potentially be handled as a local raise, then this field + -- points to a list of raise nodes, which are calls to a routine to raise + -- an exception. These are raise nodes which can be optimized into gotos + -- if the handler turns out to meet the conditions which permit this + -- transformation. Note that this does NOT include instances of the + -- N_Raise_xxx_Error nodes since the transformation of these nodes is + -- handled by the back end (using the N_Push/N_Pop mechanism). + + -- Loop_Actions (List2-Sem) + -- A list present in Component_Association nodes in array aggregates. + -- Used to collect actions that must be executed within the loop because + -- they may need to be evaluated anew each time through. + + -- Limited_View_Installed (Flag18-Sem) + -- Present in With_Clauses and in package specifications. If set on + -- with_clause, it indicates that this clause has created the current + -- limited view of the designated package. On a package specification, it + -- indicates that the limited view has already been created because the + -- package is mentioned in a limited_with_clause in the closure of the + -- unit being compiled. + + -- Local_Raise_Not_OK (Flag7-Sem) + -- Present in N_Exception_Handler nodes. Set if the handler contains + -- a construct (reraise statement, or call to subprogram in package + -- GNAT.Current_Exception) that makes the handler unsuitable as a target + -- for a local raise (one that could otherwise be converted to a goto). + + -- Must_Be_Byte_Aligned (Flag14-Sem) + -- This flag is present in N_Attribute_Reference nodes. It can be set + -- only for the Address and Unrestricted_Access attributes. If set it + -- means that the object for which the address/access is given must be on + -- a byte (more accurately a storage unit) boundary. If necessary, a copy + -- of the object is to be made before taking the address (this copy is in + -- the current scope on the stack frame). This is used for certain cases + -- of code generated by the expander that passes parameters by address. + -- + -- The reason the copy is not made by the front end is that the back end + -- has more information about type layout and may be able to (but is not + -- guaranteed to) prevent making unnecessary copies. + + -- Must_Not_Freeze (Flag8-Sem) + -- A flag present in all expression nodes. Normally expressions cause + -- freezing as described in the RM. If this flag is set, then this is + -- inhibited. This is used by the analyzer and expander to label nodes + -- that are created by semantic analysis or expansion and which must not + -- cause freezing even though they normally would. This flag is also + -- present in an N_Subtype_Indication node, since we also use these in + -- calls to Freeze_Expression. + + -- Next_Entity (Node2-Sem) + -- Present in defining identifiers, defining character literals and + -- defining operator symbols (i.e. in all entities). The entities of a + -- scope are chained, and this field is used as the forward pointer for + -- this list. See Einfo for further details. + + -- Next_Named_Actual (Node4-Sem) + -- Present in parameter association node. Set during semantic analysis to + -- point to the next named parameter, where parameters are ordered by + -- declaration order (as opposed to the actual order in the call, which + -- may be different due to named associations). Not that this field + -- points to the explicit actual parameter itself, not to the + -- N_Parameter_Association node (its parent). + + -- Next_Pragma (Node1-Sem) + -- Present in N_Pragma nodes. Used to create a linked list of pragma + -- nodes. Currently used for two purposes: + -- + -- Create a list of linked Check_Policy pragmas. The head of this list + -- is stored in Opt.Check_Policy_List (which has further details). + -- + -- Used by processing for Pre/Postcondition pragmas to store a list of + -- pragmas associated with the spec of a subprogram (see Sem_Prag for + -- details). + + -- Next_Rep_Item (Node5-Sem) + -- Present in pragma nodes and attribute definition nodes. Used to link + -- representation items that apply to an entity. See description of + -- First_Rep_Item field in Einfo for full details. + + -- Next_Use_Clause (Node3-Sem) + -- While use clauses are active during semantic processing, they are + -- chained from the scope stack entry, using Next_Use_Clause as a link + -- pointer, with Empty marking the end of the list. The head pointer is + -- in the scope stack entry (First_Use_Clause). At the end of semantic + -- processing (i.e. when Gigi sees the tree, the contents of this field + -- is undefined and should not be read). + + -- No_Ctrl_Actions (Flag7-Sem) + -- Present in N_Assignment_Statement to indicate that no finalize nor + -- adjust should take place on this assignment even though the rhs is + -- controlled. This is used in init procs and aggregate expansions where + -- the generated assignments are more initialisations than real + -- assignments. + + -- No_Elaboration_Check (Flag14-Sem) + -- Present in N_Function_Call and N_Procedure_Call_Statement. Indicates + -- that no elaboration check is needed on the call, because it appears in + -- the context of a local Suppress pragma. This is used on calls within + -- task bodies, where the actual elaboration checks are applied after + -- analysis, when the local scope stack is not present. + + -- No_Entities_Ref_In_Spec (Flag8-Sem) + -- Present in N_With_Clause nodes. Set if the with clause is on the + -- package or subprogram spec where the main unit is the corresponding + -- body, and no entities of the with'ed unit are referenced by the spec + -- (an entity may still be referenced in the body, so this flag is used + -- to generate the proper message (see Sem_Util.Check_Unused_Withs for + -- full details) + + -- No_Initialization (Flag13-Sem) + -- Present in N_Object_Declaration and N_Allocator to indicate that the + -- object must not be initialized (by Initialize or call to an init + -- proc). This is needed for controlled aggregates. When the Object + -- declaration has an expression, this flag means that this expression + -- should not be taken into account (needed for in place initialization + -- with aggregates). + + -- No_Truncation (Flag17-Sem) + -- Present in N_Unchecked_Type_Conversion node. This flag has an effect + -- only if the RM_Size of the source is greater than the RM_Size of the + -- target for scalar operands. Normally in such a case we truncate some + -- higher order bits of the source, and then sign/zero extend the result + -- to form the output value. But if this flag is set, then we do not do + -- any truncation, so for example, if an 8 bit input is converted to 5 + -- bit result which is in fact stored in 8 bits, then the high order + -- three bits of the target result will be copied from the source. This + -- is used for properly setting out of range values for use by pragmas + -- Initialize_Scalars and Normalize_Scalars. + + -- Original_Discriminant (Node2-Sem) + -- Present in identifiers. Used in references to discriminants that + -- appear in generic units. Because the names of the discriminants may be + -- different in an instance, we use this field to recover the position of + -- the discriminant in the original type, and replace it with the + -- discriminant at the same position in the instantiated type. + + -- Original_Entity (Node2-Sem) + -- Present in numeric literals. Used to denote the named number that has + -- been constant-folded into the given literal. If literal is from + -- source, or the result of some other constant-folding operation, then + -- Original_Entity is empty. This field is needed to handle properly + -- named numbers in generic units, where the Associated_Node field + -- interferes with the Entity field, making it impossible to preserve the + -- original entity at the point of instantiation (ASIS problem). + + -- Others_Discrete_Choices (List1-Sem) + -- When a case statement or variant is analyzed, the semantic checks + -- determine the actual list of choices that correspond to an others + -- choice. This list is materialized for later use by the expander and + -- the Others_Discrete_Choices field of an N_Others_Choice node points to + -- this materialized list of choices, which is in standard format for a + -- list of discrete choices, except that of course it cannot contain an + -- N_Others_Choice entry. + + -- Parameter_List_Truncated (Flag17-Sem) + -- Present in N_Function_Call and N_Procedure_Call_Statement nodes. Set + -- (for OpenVMS ports of GNAT only) if the parameter list is truncated as + -- a result of a First_Optional_Parameter specification in an + -- Import_Function, Import_Procedure, or Import_Valued_Procedure pragma. + -- The truncation is done by the expander by removing trailing parameters + -- from the argument list, in accordance with the set of rules allowing + -- such parameter removal. In particular, parameters can be removed + -- working from the end of the parameter list backwards up to and + -- including the entry designated by First_Optional_Parameter in the + -- Import pragma. Parameters can be removed if they are implicit and the + -- default value is a known-at-compile-time value, including the use of + -- the Null_Parameter attribute, or if explicit parameter values are + -- present that match the corresponding defaults. + + -- Parent_Spec (Node4-Sem) + -- For a library unit that is a child unit spec (package or subprogram + -- declaration, generic declaration or instantiation, or library level + -- rename, this field points to the compilation unit node for the parent + -- package specification. This field is Empty for library bodies (the + -- parent spec in this case can be found from the corresponding spec). + + -- PPC_Enabled (Flag5-Sem) + -- Present in N_Pragma nodes. This flag is relevant only for precondition + -- and postcondition nodes. It is true if the check corresponding to the + -- pragma type is enabled at the point where the pragma appears. + + -- Present_Expr (Uint3-Sem) + -- Present in an N_Variant node. This has a meaningful value only after + -- Gigi has back annotated the tree with representation information. At + -- this point, it contains a reference to a gcc expression that depends + -- on the values of one or more discriminants. Give a set of discriminant + -- values, this expression evaluates to False (zero) if variant is not + -- present, and True (non-zero) if it is present. See unit Repinfo for + -- further details on gigi back annotation. This field is used during + -- ASIS processing (data decomposition annex) to determine if a field is + -- present or not. + + -- Print_In_Hex (Flag13-Sem) + -- Set on an N_Integer_Literal node to indicate that the value should be + -- printed in hexadecimal in the sprint listing. Has no effect on + -- legality or semantics of program, only on the displayed output. This + -- is used to clarify output from the packed array cases. + + -- Procedure_To_Call (Node2-Sem) + -- Present in N_Allocator, N_Free_Statement, N_Simple_Return_Statement, + -- and N_Extended_Return_Statement nodes. References the entity for the + -- declaration of the procedure to be called to accomplish the required + -- operation (i.e. for the Allocate procedure in the case of N_Allocator + -- and N_Simple_Return_Statement and N_Extended_Return_Statement (for + -- allocating the return value), and for the Deallocate procedure in the + -- case of N_Free_Statement. + + -- Raises_Constraint_Error (Flag7-Sem) + -- Set on an expression whose evaluation will definitely fail constraint + -- error check. In the case of static expressions, this flag must be set + -- accurately (and if it is set, the expression is typically illegal + -- unless it appears as a non-elaborated branch of a short-circuit form). + -- For a non-static expression, this flag may be set whenever an + -- expression (e.g. an aggregate) is known to raise constraint error. If + -- set, the expression definitely will raise CE if elaborated at runtime. + -- If not set, the expression may or may not raise CE. In other words, on + -- static expressions, the flag is set accurately, on non-static + -- expressions it is set conservatively. + + -- Redundant_Use (Flag13-Sem) + -- Present in nodes that can appear as an operand in a use clause or use + -- type clause (identifiers, expanded names, attribute references). Set + -- to indicate that a use is redundant (and therefore need not be undone + -- on scope exit). + + -- Renaming_Exception (Node2-Sem) + -- Present in N_Exception_Declaration node. Used to point back to the + -- exception renaming for an exception declared within a subprogram. + -- What happens is that an exception declared in a subprogram is moved + -- to the library level with a unique name, and the original exception + -- becomes a renaming. This link from the library level exception to the + -- renaming declaration allows registering of the proper exception name. + + -- Return_Statement_Entity (Node5-Sem) + -- Present in N_Simple_Return_Statement and N_Extended_Return_Statement. + -- Points to an E_Return_Statement representing the return statement. + + -- Return_Object_Declarations (List3) + -- Present in N_Extended_Return_Statement. + -- Points to a list initially containing a single + -- N_Object_Declaration representing the return object. + -- We use a list (instead of just a pointer to the object decl) + -- because Analyze wants to insert extra actions on this list. + + -- Rounded_Result (Flag18-Sem) + -- Present in N_Type_Conversion, N_Op_Divide and N_Op_Multiply nodes. + -- Used in the fixed-point cases to indicate that the result must be + -- rounded as a result of the use of the 'Round attribute. Also used for + -- integer N_Op_Divide nodes to indicate that the result should be + -- rounded to the nearest integer (breaking ties away from zero), rather + -- than truncated towards zero as usual. These rounded integer operations + -- are the result of expansion of rounded fixed-point divide, conversion + -- and multiplication operations. + + -- Scope (Node3-Sem) + -- Present in defining identifiers, defining character literals and + -- defining operator symbols (i.e. in all entities). The entities of a + -- scope all use this field to reference the corresponding scope entity. + -- See Einfo for further details. + + -- Shift_Count_OK (Flag4-Sem) + -- A flag present in shift nodes to indicate that the shift count is + -- known to be in range, i.e. is in the range from zero to word length + -- minus one. If this flag is not set, then the shift count may be + -- outside this range, i.e. larger than the word length, and the code + -- must ensure that such shift counts give the appropriate result. + + -- Source_Type (Node1-Sem) + -- Used in an N_Validate_Unchecked_Conversion node to point to the + -- source type entity for the unchecked conversion instantiation + -- which gigi must do size validation for. + + -- Static_Processing_OK (Flag4-Sem) + -- Present in N_Aggregate nodes. When the Compile_Time_Known_Aggregate + -- flag is set, the full value of the aggregate can be determined at + -- compile time and the aggregate can be passed as is to the back-end. + -- In this event it is irrelevant whether this flag is set or not. + -- However, if the flag Compile_Time_Known_Aggregate is not set but + -- Static_Processing_OK is set, the aggregate can (but need not) be + -- converted into a compile time known aggregate by the expander. See + -- Sem_Aggr for the specific conditions under which an aggregate has its + -- Static_Processing_OK flag set. + + -- Storage_Pool (Node1-Sem) + -- Present in N_Allocator, N_Free_Statement, N_Simple_Return_Statement, + -- and N_Extended_Return_Statement nodes. References the entity for the + -- storage pool to be used for the allocate or free call or for the + -- allocation of the returned value from function. Empty indicates that + -- the global default pool is to be used. Note that in the case + -- of a return statement, this field is set only if the function returns + -- value of a type whose size is not known at compile time on the + -- secondary stack. + + -- Target_Type (Node2-Sem) + -- Used in an N_Validate_Unchecked_Conversion node to point to the target + -- type entity for the unchecked conversion instantiation which gigi must + -- do size validation for. + + -- Then_Actions (List3-Sem) + -- This field is present in conditional expression nodes. During code + -- expansion we use the Insert_Actions procedure (in Exp_Util) to insert + -- actions at an appropriate place in the tree to get elaborated at the + -- right time. For conditional expressions, we have to be sure that the + -- actions for the Then branch are only elaborated if the condition is + -- True. The Then_Actions field is used as a temporary parking place for + -- these actions. The final tree is always rewritten to eliminate the + -- need for this field, so in the tree passed to Gigi, this field is + -- always set to No_List. + + -- Treat_Fixed_As_Integer (Flag14-Sem) + -- This flag appears in operator nodes for divide, multiply, mod and rem + -- on fixed-point operands. It indicates that the operands are to be + -- treated as integer values, ignoring small values. This flag is only + -- set as a result of expansion of fixed-point operations. Typically a + -- fixed-point multiplication in the source generates subsidiary + -- multiplication and division operations that work with the underlying + -- integer values and have this flag set. Note that this flag is not + -- needed on other arithmetic operations (add, neg, subtract etc.) since + -- in these cases it is always the case that fixed is treated as integer. + -- The Etype field MUST be set if this flag is set. The analyzer knows to + -- leave such nodes alone, and whoever makes them must set the correct + -- Etype value. + + -- TSS_Elist (Elist3-Sem) + -- Present in N_Freeze_Entity nodes. Holds an element list containing + -- entries for each TSS (type support subprogram) associated with the + -- frozen type. The elements of the list are the entities for the + -- subprograms (see package Exp_TSS for further details). Set to No_Elist + -- if there are no type support subprograms for the type or if the freeze + -- node is not for a type. + + -- Unreferenced_In_Spec (Flag7-Sem) + -- Present in N_With_Clause nodes. Set if the with clause is on the + -- package or subprogram spec where the main unit is the corresponding + -- body, and is not referenced by the spec (it may still be referenced by + -- the body, so this flag is used to generate the proper message (see + -- Sem_Util.Check_Unused_Withs for details) + + -- Was_Originally_Stub (Flag13-Sem) + -- This flag is set in the node for a proper body that replaces stub. + -- During the analysis procedure, stubs in some situations get rewritten + -- by the corresponding bodies, and we set this flag to remember that + -- this happened. Note that it is not good enough to rely on the use of + -- Original_Node here because of the case of nested instantiations where + -- the substituted node can be copied. + + -- Zero_Cost_Handling (Flag5-Sem) + -- This flag is set in all handled sequence of statement and exception + -- handler nodes if exceptions are to be handled using the zero-cost + -- mechanism (see Ada.Exceptions and System.Exceptions in files + -- a-except.ads/adb and s-except.ads for full details). What gigi needs + -- to do for such a handler is simply to put the code in the handler + -- somewhere. The front end has generated all necessary labels. + + -------------------------------------------------- + -- Note on Use of End_Label and End_Span Fields -- + -------------------------------------------------- + + -- Several constructs have end lines: + + -- Loop Statement end loop [loop_IDENTIFIER]; + -- Package Specification end [[PARENT_UNIT_NAME .] IDENTIFIER] + -- Task Definition end [task_IDENTIFIER] + -- Protected Definition end [protected_IDENTIFIER] + -- Protected Body end [protected_IDENTIFIER] + + -- Block Statement end [block_IDENTIFIER]; + -- Subprogram Body end [DESIGNATOR]; + -- Package Body end [[PARENT_UNIT_NAME .] IDENTIFIER]; + -- Task Body end [task_IDENTIFIER]; + -- Accept Statement end [entry_IDENTIFIER]]; + -- Entry Body end [entry_IDENTIFIER]; + + -- If Statement end if; + -- Case Statement end case; + + -- Record Definition end record; + -- Enumeration Definition ); + + -- The End_Label and End_Span fields are used to mark the locations of + -- these lines, and also keep track of the label in the case where a label + -- is present. + + -- For the first group above, the End_Label field of the corresponding node + -- is used to point to the label identifier. In the case where there is no + -- label in the source, the parser supplies a dummy identifier (with + -- Comes_From_Source set to False), and the Sloc of this dummy identifier + -- marks the location of the token following the END token. + + -- For the second group, the use of End_Label is similar, but the End_Label + -- is found in the N_Handled_Sequence_Of_Statements node. This is done + -- simply because in some cases there is no room in the parent node. + + -- For the third group, there is never any label, and instead of using + -- End_Label, we use the End_Span field which gives the location of the + -- token following END, relative to the starting Sloc of the construct, + -- i.e. add Sloc (Node) + End_Span (Node) to get the Sloc of the IF or CASE + -- following the End_Label. + + -- The record definition case is handled specially, we treat it as though + -- it required an optional label which is never present, and so the parser + -- always builds a dummy identifier with Comes From Source set False. The + -- reason we do this, rather than using End_Span in this case, is that we + -- want to generate a cross-ref entry for the end of a record, since it + -- represents a scope for name declaration purposes. + + -- The enumeration definition case is handled in an exactly similar manner, + -- building a dummy identifier to get a cross-reference. + + -- Note: the reason we store the difference as a Uint, instead of storing + -- the Source_Ptr value directly, is that Source_Ptr values cannot be + -- distinguished from other types of values, and we count on all general + -- use fields being self describing. To make things easier for clients, + -- note that we provide function End_Location, and procedure + -- Set_End_Location to allow access to the logical value (which is the + -- Source_Ptr value for the end token). + + --------------------- + -- Syntactic Nodes -- + --------------------- + + --------------------- + -- 2.3 Identifier -- + --------------------- + + -- IDENTIFIER ::= IDENTIFIER_LETTER {[UNDERLINE] LETTER_OR_DIGIT} + -- LETTER_OR_DIGIT ::= IDENTIFIER_LETTER | DIGIT + + -- An IDENTIFIER shall not be a reserved word + + -- In the Ada grammar identifiers are the bottom level tokens which have + -- very few semantics. Actual program identifiers are direct names. If + -- we were being 100% honest with the grammar, then we would have a node + -- called N_Direct_Name which would point to an identifier. However, + -- that's too many extra nodes, so we just use the N_Identifier node + -- directly as a direct name, and it contains the expression fields and + -- Entity field that correspond to its use as a direct name. In those + -- few cases where identifiers appear in contexts where they are not + -- direct names (pragmas, pragma argument associations, attribute + -- references and attribute definition clauses), the Chars field of the + -- node contains the Name_Id for the identifier name. + + -- Note: in GNAT, a reserved word can be treated as an identifier in two + -- cases. First, an incorrect use of a reserved word as an identifier is + -- diagnosed and then treated as a normal identifier. Second, an + -- attribute designator of the form of a reserved word (access, delta, + -- digits, range) is treated as an identifier. + + -- Note: The set of letters that is permitted in an identifier depends + -- on the character set in use. See package Csets for full details. + + -- N_Identifier + -- Sloc points to identifier + -- Chars (Name1) contains the Name_Id for the identifier + -- Entity (Node4-Sem) + -- Associated_Node (Node4-Sem) + -- Original_Discriminant (Node2-Sem) + -- Redundant_Use (Flag13-Sem) + -- Has_Private_View (Flag11-Sem) (set in generic units) + -- plus fields for expression + + -------------------------- + -- 2.4 Numeric Literal -- + -------------------------- + + -- NUMERIC_LITERAL ::= DECIMAL_LITERAL | BASED_LITERAL + + ---------------------------- + -- 2.4.1 Decimal Literal -- + ---------------------------- + + -- DECIMAL_LITERAL ::= NUMERAL [.NUMERAL] [EXPONENT] + + -- NUMERAL ::= DIGIT {[UNDERLINE] DIGIT} + + -- EXPONENT ::= E [+] NUMERAL | E - NUMERAL + + -- Decimal literals appear in the tree as either integer literal nodes + -- or real literal nodes, depending on whether a period is present. + + -- Note: literal nodes appear as a result of direct use of literals + -- in the source program, and also as the result of evaluating + -- expressions at compile time. In the latter case, it is possible + -- to construct real literals that have no syntactic representation + -- using the standard literal format. Such literals are listed by + -- Sprint using the notation [numerator / denominator]. + + -- Note: the value of an integer literal node created by the front end + -- is never outside the range of values of the base type. However, it + -- can be the case that the value is outside the range of the + -- particular subtype. This happens in the case of integer overflows + -- with checks suppressed. + + -- N_Integer_Literal + -- Sloc points to literal + -- Original_Entity (Node2-Sem) If not Empty, holds Named_Number that + -- has been constant-folded into its literal value. + -- Intval (Uint3) contains integer value of literal + -- plus fields for expression + -- Print_In_Hex (Flag13-Sem) + + -- N_Real_Literal + -- Sloc points to literal + -- Original_Entity (Node2-Sem) If not Empty, holds Named_Number that + -- has been constant-folded into its literal value. + -- Realval (Ureal3) contains real value of literal + -- Corresponding_Integer_Value (Uint4-Sem) + -- Is_Machine_Number (Flag11-Sem) + -- plus fields for expression + + -------------------------- + -- 2.4.2 Based Literal -- + -------------------------- + + -- BASED_LITERAL ::= + -- BASE # BASED_NUMERAL [.BASED_NUMERAL] # [EXPONENT] + + -- BASE ::= NUMERAL + + -- BASED_NUMERAL ::= + -- EXTENDED_DIGIT {[UNDERLINE] EXTENDED_DIGIT} + + -- EXTENDED_DIGIT ::= DIGIT | A | B | C | D | E | F + + -- Based literals appear in the tree as either integer literal nodes + -- or real literal nodes, depending on whether a period is present. + + ---------------------------- + -- 2.5 Character Literal -- + ---------------------------- + + -- CHARACTER_LITERAL ::= ' GRAPHIC_CHARACTER ' + + -- N_Character_Literal + -- Sloc points to literal + -- Chars (Name1) contains the Name_Id for the identifier + -- Char_Literal_Value (Uint2) contains the literal value + -- Entity (Node4-Sem) + -- Associated_Node (Node4-Sem) + -- Has_Private_View (Flag11-Sem) set in generic units. + -- plus fields for expression + + -- Note: the Entity field will be missing (set to Empty) for character + -- literals whose type is Standard.Wide_Character or Standard.Character + -- or a type derived from one of these two. In this case the character + -- literal stands for its own coding. The reason we take this irregular + -- short cut is to avoid the need to build lots of junk defining + -- character literal nodes. + + ------------------------- + -- 2.6 String Literal -- + ------------------------- + + -- STRING LITERAL ::= "{STRING_ELEMENT}" + + -- A STRING_ELEMENT is either a pair of quotation marks ("), or a + -- single GRAPHIC_CHARACTER other than a quotation mark. + -- + -- Is_Folded_In_Parser is True if the parser created this literal by + -- folding a sequence of "&" operators. For example, if the source code + -- says "aaa" & "bbb" & "ccc", and this produces "aaabbbccc", the flag + -- is set. This flag is needed because the parser doesn't know about + -- visibility, so the folded result might be wrong, and semantic + -- analysis needs to check for that. + + -- N_String_Literal + -- Sloc points to literal + -- Strval (Str3) contains Id of string value + -- Has_Wide_Character (Flag11-Sem) + -- Is_Folded_In_Parser (Flag4) + -- plus fields for expression + + ------------------ + -- 2.7 Comment -- + ------------------ + + -- A COMMENT starts with two adjacent hyphens and extends up to the + -- end of the line. A COMMENT may appear on any line of a program. + + -- Comments are skipped by the scanner and do not appear in the tree. + -- It is possible to reconstruct the position of comments with respect + -- to the elements of the tree by using the source position (Sloc) + -- pointers that appear in every tree node. + + ----------------- + -- 2.8 Pragma -- + ----------------- + + -- PRAGMA ::= pragma IDENTIFIER + -- [(PRAGMA_ARGUMENT_ASSOCIATION {, PRAGMA_ARGUMENT_ASSOCIATION})]; + + -- Note that a pragma may appear in the tree anywhere a declaration + -- or a statement may appear, as well as in some other situations + -- which are explicitly documented. + + -- N_Pragma + -- Sloc points to pragma identifier + -- Next_Pragma (Node1-Sem) + -- Pragma_Argument_Associations (List2) (set to No_List if none) + -- Debug_Statement (Node3) (set to Empty if not Debug, Assert) + -- Pragma_Identifier (Node4) + -- Next_Rep_Item (Node5-Sem) + -- PPC_Enabled (Flag5-Sem) + + -- Note: we should have a section on what pragmas are passed on to + -- the back end to be processed. This section should note that pragma + -- Psect_Object is always converted to Common_Object, but there are + -- undoubtedly many other similar notes required ??? + + -- Note: a utility function Pragma_Name may be applied to pragma nodes + -- to conveniently obtain the Chars field of the Pragma_Identifier. + + -------------------------------------- + -- 2.8 Pragma Argument Association -- + -------------------------------------- + + -- PRAGMA_ARGUMENT_ASSOCIATION ::= + -- [pragma_argument_IDENTIFIER =>] NAME + -- | [pragma_argument_IDENTIFIER =>] EXPRESSION + + -- N_Pragma_Argument_Association + -- Sloc points to first token in association + -- Chars (Name1) (set to No_Name if no pragma argument identifier) + -- Expression (Node3) + + ------------------------ + -- 2.9 Reserved Word -- + ------------------------ + + -- Reserved words are parsed by the scanner, and returned as the + -- corresponding token types (e.g. PACKAGE is returned as Tok_Package) + + ---------------------------- + -- 3.1 Basic Declaration -- + ---------------------------- + + -- BASIC_DECLARATION ::= + -- TYPE_DECLARATION | SUBTYPE_DECLARATION + -- | OBJECT_DECLARATION | NUMBER_DECLARATION + -- | SUBPROGRAM_DECLARATION | ABSTRACT_SUBPROGRAM_DECLARATION + -- | PACKAGE_DECLARATION | RENAMING_DECLARATION + -- | EXCEPTION_DECLARATION | GENERIC_DECLARATION + -- | GENERIC_INSTANTIATION + + -- Basic declaration also includes IMPLICIT_LABEL_DECLARATION + -- see further description in section on semantic nodes. + + -- Also, in the tree that is constructed, a pragma may appear + -- anywhere that a declaration may appear. + + ------------------------------ + -- 3.1 Defining Identifier -- + ------------------------------ + + -- DEFINING_IDENTIFIER ::= IDENTIFIER + + -- A defining identifier is an entity, which has additional fields + -- depending on the setting of the Ekind field. These additional + -- fields are defined (and access subprograms declared) in package + -- Einfo. + + -- Note: N_Defining_Identifier is an extended node whose fields are + -- deliberate layed out to match the layout of fields in an ordinary + -- N_Identifier node allowing for easy alteration of an identifier + -- node into a defining identifier node. For details, see procedure + -- Sinfo.CN.Change_Identifier_To_Defining_Identifier. + + -- N_Defining_Identifier + -- Sloc points to identifier + -- Chars (Name1) contains the Name_Id for the identifier + -- Next_Entity (Node2-Sem) + -- Scope (Node3-Sem) + -- Etype (Node5-Sem) + + ----------------------------- + -- 3.2.1 Type Declaration -- + ----------------------------- + + -- TYPE_DECLARATION ::= + -- FULL_TYPE_DECLARATION + -- | INCOMPLETE_TYPE_DECLARATION + -- | PRIVATE_TYPE_DECLARATION + -- | PRIVATE_EXTENSION_DECLARATION + + ---------------------------------- + -- 3.2.1 Full Type Declaration -- + ---------------------------------- + + -- FULL_TYPE_DECLARATION ::= + -- type DEFINING_IDENTIFIER [KNOWN_DISCRIMINANT_PART] + -- is TYPE_DEFINITION; + -- | TASK_TYPE_DECLARATION + -- | PROTECTED_TYPE_DECLARATION + + -- The full type declaration node is used only for the first case. The + -- second case (concurrent type declaration), is represented directly + -- by a task type declaration or a protected type declaration. + + -- N_Full_Type_Declaration + -- Sloc points to TYPE + -- Defining_Identifier (Node1) + -- Discriminant_Specifications (List4) (set to No_List if none) + -- Type_Definition (Node3) + -- Discr_Check_Funcs_Built (Flag11-Sem) + + ---------------------------- + -- 3.2.1 Type Definition -- + ---------------------------- + + -- TYPE_DEFINITION ::= + -- ENUMERATION_TYPE_DEFINITION | INTEGER_TYPE_DEFINITION + -- | REAL_TYPE_DEFINITION | ARRAY_TYPE_DEFINITION + -- | RECORD_TYPE_DEFINITION | ACCESS_TYPE_DEFINITION + -- | DERIVED_TYPE_DEFINITION | INTERFACE_TYPE_DEFINITION + + -------------------------------- + -- 3.2.2 Subtype Declaration -- + -------------------------------- + + -- SUBTYPE_DECLARATION ::= + -- subtype DEFINING_IDENTIFIER is [NULL_EXCLUSION] SUBTYPE_INDICATION; + + -- The subtype indication field is set to Empty for subtypes + -- declared in package Standard (Positive, Natural). + + -- N_Subtype_Declaration + -- Sloc points to SUBTYPE + -- Defining_Identifier (Node1) + -- Null_Exclusion_Present (Flag11) + -- Subtype_Indication (Node5) + -- Generic_Parent_Type (Node4-Sem) (set for an actual derived type). + -- Exception_Junk (Flag8-Sem) + + ------------------------------- + -- 3.2.2 Subtype Indication -- + ------------------------------- + + -- SUBTYPE_INDICATION ::= SUBTYPE_MARK [CONSTRAINT] + + -- Note: if no constraint is present, the subtype indication appears + -- directly in the tree as a subtype mark. The N_Subtype_Indication + -- node is used only if a constraint is present. + + -- Note: [For Ada 2005 (AI-231)]: Because Ada 2005 extends this rule + -- with the null-exclusion part (see AI-231), we had to introduce a new + -- attribute in all the parents of subtype_indication nodes to indicate + -- if the null-exclusion is present. + + -- Note: the reason that this node has expression fields is that a + -- subtype indication can appear as an operand of a membership test. + + -- N_Subtype_Indication + -- Sloc points to first token of subtype mark + -- Subtype_Mark (Node4) + -- Constraint (Node3) + -- Etype (Node5-Sem) + -- Must_Not_Freeze (Flag8-Sem) + + -- Note: Etype is a copy of the Etype field of the Subtype_Mark. The + -- reason for this redundancy is so that in a list of array index types, + -- the Etype can be uniformly accessed to determine the subscript type. + -- This means that no Itype is constructed for the actual subtype that + -- is created by the subtype indication. If such an Itype is required, + -- it is constructed in the context in which the indication appears. + + ------------------------- + -- 3.2.2 Subtype Mark -- + ------------------------- + + -- SUBTYPE_MARK ::= subtype_NAME + + ----------------------- + -- 3.2.2 Constraint -- + ----------------------- + + -- CONSTRAINT ::= SCALAR_CONSTRAINT | COMPOSITE_CONSTRAINT + + ------------------------------ + -- 3.2.2 Scalar Constraint -- + ------------------------------ + + -- SCALAR_CONSTRAINT ::= + -- RANGE_CONSTRAINT | DIGITS_CONSTRAINT | DELTA_CONSTRAINT + + --------------------------------- + -- 3.2.2 Composite Constraint -- + --------------------------------- + + -- COMPOSITE_CONSTRAINT ::= + -- INDEX_CONSTRAINT | DISCRIMINANT_CONSTRAINT + + ------------------------------- + -- 3.3.1 Object Declaration -- + ------------------------------- + + -- OBJECT_DECLARATION ::= + -- DEFINING_IDENTIFIER_LIST : [aliased] [constant] + -- [NULL_EXCLUSION] SUBTYPE_INDICATION [:= EXPRESSION]; + -- | DEFINING_IDENTIFIER_LIST : [aliased] [constant] + -- ACCESS_DEFINITION [:= EXPRESSION]; + -- | DEFINING_IDENTIFIER_LIST : [aliased] [constant] + -- ARRAY_TYPE_DEFINITION [:= EXPRESSION]; + -- | SINGLE_TASK_DECLARATION + -- | SINGLE_PROTECTED_DECLARATION + + -- Note: aliased is not permitted in Ada 83 mode + + -- The N_Object_Declaration node is only for the first two cases. + -- Single task declaration is handled by P_Task (9.1) + -- Single protected declaration is handled by P_protected (9.5) + + -- Although the syntax allows multiple identifiers in the list, the + -- semantics is as though successive declarations were given with + -- identical type definition and expression components. To simplify + -- semantic processing, the parser represents a multiple declaration + -- case as a sequence of single declarations, using the More_Ids and + -- Prev_Ids flags to preserve the original source form as described + -- in the section on "Handling of Defining Identifier Lists". + + -- The flag Has_Init_Expression is set if an initializing expression + -- is present. Normally it is set if and only if Expression contains + -- a non-empty value, but there is an exception to this. When the + -- initializing expression is an aggregate which requires explicit + -- assignments, the Expression field gets set to Empty, but this flag + -- is still set, so we don't forget we had an initializing expression. + + -- Note: if a range check is required for the initialization + -- expression then the Do_Range_Check flag is set in the Expression, + -- with the check being done against the type given by the object + -- definition, which is also the Etype of the defining identifier. + + -- Note: the contents of the Expression field must be ignored (i.e. + -- treated as though it were Empty) if No_Initialization is set True. + + -- Note: the back end places some restrictions on the form of the + -- Expression field. If the object being declared is Atomic, then + -- the Expression may not have the form of an aggregate (since this + -- might cause the back end to generate separate assignments). It + -- also cannot be a reference to an object marked as a true constant + -- (Is_True_Constant flag set), where the object is itself initialized + -- with an aggregate. If necessary the front end must generate an + -- extra temporary (with Is_True_Constant set False), and initialize + -- this temporary as required (the temporary itself is not atomic). + + -- Note: there is not node kind for object definition. Instead, the + -- corresponding field holds a subtype indication, an array type + -- definition, or (Ada 2005, AI-406) an access definition. + + -- N_Object_Declaration + -- Sloc points to first identifier + -- Defining_Identifier (Node1) + -- Aliased_Present (Flag4) set if ALIASED appears + -- Constant_Present (Flag17) set if CONSTANT appears + -- Null_Exclusion_Present (Flag11) + -- Object_Definition (Node4) subtype indic./array type def./ access def. + -- Expression (Node3) (set to Empty if not present) + -- Handler_List_Entry (Node2-Sem) + -- Corresponding_Generic_Association (Node5-Sem) + -- More_Ids (Flag5) (set to False if no more identifiers in list) + -- Prev_Ids (Flag6) (set to False if no previous identifiers in list) + -- No_Initialization (Flag13-Sem) + -- Assignment_OK (Flag15-Sem) + -- Exception_Junk (Flag8-Sem) + -- Is_Subprogram_Descriptor (Flag16-Sem) + -- Has_Init_Expression (Flag14) + + ------------------------------------- + -- 3.3.1 Defining Identifier List -- + ------------------------------------- + + -- DEFINING_IDENTIFIER_LIST ::= + -- DEFINING_IDENTIFIER {, DEFINING_IDENTIFIER} + + ------------------------------- + -- 3.3.2 Number Declaration -- + ------------------------------- + + -- NUMBER_DECLARATION ::= + -- DEFINING_IDENTIFIER_LIST : constant := static_EXPRESSION; + + -- Although the syntax allows multiple identifiers in the list, the + -- semantics is as though successive declarations were given with + -- identical expressions. To simplify semantic processing, the parser + -- represents a multiple declaration case as a sequence of single + -- declarations, using the More_Ids and Prev_Ids flags to preserve + -- the original source form as described in the section on "Handling + -- of Defining Identifier Lists". + + -- N_Number_Declaration + -- Sloc points to first identifier + -- Defining_Identifier (Node1) + -- Expression (Node3) + -- More_Ids (Flag5) (set to False if no more identifiers in list) + -- Prev_Ids (Flag6) (set to False if no previous identifiers in list) + + ---------------------------------- + -- 3.4 Derived Type Definition -- + ---------------------------------- + + -- DERIVED_TYPE_DEFINITION ::= + -- [abstract] [limited] new [NULL_EXCLUSION] parent_SUBTYPE_INDICATION + -- [[and INTERFACE_LIST] RECORD_EXTENSION_PART] + + -- Note: ABSTRACT, LIMITED and record extension part are not permitted + -- in Ada 83 mode + + -- Note: a record extension part is required if ABSTRACT is present + + -- N_Derived_Type_Definition + -- Sloc points to NEW + -- Abstract_Present (Flag4) + -- Null_Exclusion_Present (Flag11) (set to False if not present) + -- Subtype_Indication (Node5) + -- Record_Extension_Part (Node3) (set to Empty if not present) + -- Limited_Present (Flag17) + -- Task_Present (Flag5) set in task interfaces + -- Protected_Present (Flag6) set in protected interfaces + -- Synchronized_Present (Flag7) set in interfaces + -- Interface_List (List2) (set to No_List if none) + -- Interface_Present (Flag16) set in abstract interfaces + + -- Note: Task_Present, Protected_Present, Synchronized_Present, + -- Interface_List, and Interface_Present are used for abstract + -- interfaces (see comments for INTERFACE_TYPE_DEFINITION). + + --------------------------- + -- 3.5 Range Constraint -- + --------------------------- + + -- RANGE_CONSTRAINT ::= range RANGE + + -- N_Range_Constraint + -- Sloc points to RANGE + -- Range_Expression (Node4) + + ---------------- + -- 3.5 Range -- + ---------------- + + -- RANGE ::= + -- RANGE_ATTRIBUTE_REFERENCE + -- | SIMPLE_EXPRESSION .. SIMPLE_EXPRESSION + + -- Note: the case of a range given as a range attribute reference + -- appears directly in the tree as an attribute reference. + + -- Note: the field name for a reference to a range is Range_Expression + -- rather than Range, because range is a reserved keyword in Ada! + + -- Note: the reason that this node has expression fields is that a + -- range can appear as an operand of a membership test. The Etype + -- field is the type of the range (we do NOT construct an implicit + -- subtype to represent the range exactly). + + -- N_Range + -- Sloc points to .. + -- Low_Bound (Node1) + -- High_Bound (Node2) + -- Includes_Infinities (Flag11) + -- plus fields for expression + + -- Note: if the range appears in a context, such as a subtype + -- declaration, where range checks are required on one or both of + -- the expression fields, then type conversion nodes are inserted + -- to represent the required checks. + + ---------------------------------------- + -- 3.5.1 Enumeration Type Definition -- + ---------------------------------------- + + -- ENUMERATION_TYPE_DEFINITION ::= + -- (ENUMERATION_LITERAL_SPECIFICATION + -- {, ENUMERATION_LITERAL_SPECIFICATION}) + + -- Note: the Literals field in the node described below is null for + -- the case of the standard types CHARACTER and WIDE_CHARACTER, for + -- which special processing handles these types as special cases. + + -- N_Enumeration_Type_Definition + -- Sloc points to left parenthesis + -- Literals (List1) (Empty for CHARACTER or WIDE_CHARACTER) + -- End_Label (Node4) (set to Empty if internally generated record) + + ---------------------------------------------- + -- 3.5.1 Enumeration Literal Specification -- + ---------------------------------------------- + + -- ENUMERATION_LITERAL_SPECIFICATION ::= + -- DEFINING_IDENTIFIER | DEFINING_CHARACTER_LITERAL + + --------------------------------------- + -- 3.5.1 Defining Character Literal -- + --------------------------------------- + + -- DEFINING_CHARACTER_LITERAL ::= CHARACTER_LITERAL + + -- A defining character literal is an entity, which has additional + -- fields depending on the setting of the Ekind field. These + -- additional fields are defined (and access subprograms declared) + -- in package Einfo. + + -- Note: N_Defining_Character_Literal is an extended node whose fields + -- are deliberate layed out to match the layout of fields in an ordinary + -- N_Character_Literal node allowing for easy alteration of a character + -- literal node into a defining character literal node. For details, see + -- Sinfo.CN.Change_Character_Literal_To_Defining_Character_Literal. + + -- N_Defining_Character_Literal + -- Sloc points to literal + -- Chars (Name1) contains the Name_Id for the identifier + -- Next_Entity (Node2-Sem) + -- Scope (Node3-Sem) + -- Etype (Node5-Sem) + + ------------------------------------ + -- 3.5.4 Integer Type Definition -- + ------------------------------------ + + -- Note: there is an error in this rule in the latest version of the + -- grammar, so we have retained the old rule pending clarification. + + -- INTEGER_TYPE_DEFINITION ::= + -- SIGNED_INTEGER_TYPE_DEFINITION + -- | MODULAR_TYPE_DEFINITION + + ------------------------------------------- + -- 3.5.4 Signed Integer Type Definition -- + ------------------------------------------- + + -- SIGNED_INTEGER_TYPE_DEFINITION ::= + -- range static_SIMPLE_EXPRESSION .. static_SIMPLE_EXPRESSION + + -- Note: the Low_Bound and High_Bound fields are set to Empty + -- for integer types defined in package Standard. + + -- N_Signed_Integer_Type_Definition + -- Sloc points to RANGE + -- Low_Bound (Node1) + -- High_Bound (Node2) + + ------------------------------------ + -- 3.5.4 Modular Type Definition -- + ------------------------------------ + + -- MODULAR_TYPE_DEFINITION ::= mod static_EXPRESSION + + -- N_Modular_Type_Definition + -- Sloc points to MOD + -- Expression (Node3) + + --------------------------------- + -- 3.5.6 Real Type Definition -- + --------------------------------- + + -- REAL_TYPE_DEFINITION ::= + -- FLOATING_POINT_DEFINITION | FIXED_POINT_DEFINITION + + -------------------------------------- + -- 3.5.7 Floating Point Definition -- + -------------------------------------- + + -- FLOATING_POINT_DEFINITION ::= + -- digits static_SIMPLE_EXPRESSION [REAL_RANGE_SPECIFICATION] + + -- Note: The Digits_Expression and Real_Range_Specifications fields + -- are set to Empty for floating-point types declared in Standard. + + -- N_Floating_Point_Definition + -- Sloc points to DIGITS + -- Digits_Expression (Node2) + -- Real_Range_Specification (Node4) (set to Empty if not present) + + ------------------------------------- + -- 3.5.7 Real Range Specification -- + ------------------------------------- + + -- REAL_RANGE_SPECIFICATION ::= + -- range static_SIMPLE_EXPRESSION .. static_SIMPLE_EXPRESSION + + -- N_Real_Range_Specification + -- Sloc points to RANGE + -- Low_Bound (Node1) + -- High_Bound (Node2) + + ----------------------------------- + -- 3.5.9 Fixed Point Definition -- + ----------------------------------- + + -- FIXED_POINT_DEFINITION ::= + -- ORDINARY_FIXED_POINT_DEFINITION | DECIMAL_FIXED_POINT_DEFINITION + + -------------------------------------------- + -- 3.5.9 Ordinary Fixed Point Definition -- + -------------------------------------------- + + -- ORDINARY_FIXED_POINT_DEFINITION ::= + -- delta static_EXPRESSION REAL_RANGE_SPECIFICATION + + -- Note: In Ada 83, the EXPRESSION must be a SIMPLE_EXPRESSION + + -- N_Ordinary_Fixed_Point_Definition + -- Sloc points to DELTA + -- Delta_Expression (Node3) + -- Real_Range_Specification (Node4) + + ------------------------------------------- + -- 3.5.9 Decimal Fixed Point Definition -- + ------------------------------------------- + + -- DECIMAL_FIXED_POINT_DEFINITION ::= + -- delta static_EXPRESSION + -- digits static_EXPRESSION [REAL_RANGE_SPECIFICATION] + + -- Note: decimal types are not permitted in Ada 83 mode + + -- N_Decimal_Fixed_Point_Definition + -- Sloc points to DELTA + -- Delta_Expression (Node3) + -- Digits_Expression (Node2) + -- Real_Range_Specification (Node4) (set to Empty if not present) + + ------------------------------ + -- 3.5.9 Digits Constraint -- + ------------------------------ + + -- DIGITS_CONSTRAINT ::= + -- digits static_EXPRESSION [RANGE_CONSTRAINT] + + -- Note: in Ada 83, the EXPRESSION must be a SIMPLE_EXPRESSION + -- Note: in Ada 95, reduced accuracy subtypes are obsolescent + + -- N_Digits_Constraint + -- Sloc points to DIGITS + -- Digits_Expression (Node2) + -- Range_Constraint (Node4) (set to Empty if not present) + + -------------------------------- + -- 3.6 Array Type Definition -- + -------------------------------- + + -- ARRAY_TYPE_DEFINITION ::= + -- UNCONSTRAINED_ARRAY_DEFINITION | CONSTRAINED_ARRAY_DEFINITION + + ----------------------------------------- + -- 3.6 Unconstrained Array Definition -- + ----------------------------------------- + + -- UNCONSTRAINED_ARRAY_DEFINITION ::= + -- array (INDEX_SUBTYPE_DEFINITION {, INDEX_SUBTYPE_DEFINITION}) of + -- COMPONENT_DEFINITION + + -- Note: dimensionality of array is indicated by number of entries in + -- the Subtype_Marks list, which has one entry for each dimension. + + -- N_Unconstrained_Array_Definition + -- Sloc points to ARRAY + -- Subtype_Marks (List2) + -- Component_Definition (Node4) + + ----------------------------------- + -- 3.6 Index Subtype Definition -- + ----------------------------------- + + -- INDEX_SUBTYPE_DEFINITION ::= SUBTYPE_MARK range <> + + -- There is no explicit node in the tree for an index subtype + -- definition since the N_Unconstrained_Array_Definition node + -- incorporates the type marks which appear in this context. + + --------------------------------------- + -- 3.6 Constrained Array Definition -- + --------------------------------------- + + -- CONSTRAINED_ARRAY_DEFINITION ::= + -- array (DISCRETE_SUBTYPE_DEFINITION + -- {, DISCRETE_SUBTYPE_DEFINITION}) + -- of COMPONENT_DEFINITION + + -- Note: dimensionality of array is indicated by number of entries + -- in the Discrete_Subtype_Definitions list, which has one entry + -- for each dimension. + + -- N_Constrained_Array_Definition + -- Sloc points to ARRAY + -- Discrete_Subtype_Definitions (List2) + -- Component_Definition (Node4) + + -------------------------------------- + -- 3.6 Discrete Subtype Definition -- + -------------------------------------- + + -- DISCRETE_SUBTYPE_DEFINITION ::= + -- discrete_SUBTYPE_INDICATION | RANGE + + ------------------------------- + -- 3.6 Component Definition -- + ------------------------------- + + -- COMPONENT_DEFINITION ::= + -- [aliased] [NULL_EXCLUSION] SUBTYPE_INDICATION | ACCESS_DEFINITION + + -- Note: although the syntax does not permit a component definition to + -- be an anonymous array (and the parser will diagnose such an attempt + -- with an appropriate message), it is possible for anonymous arrays + -- to appear as component definitions. The semantics and back end handle + -- this case properly, and the expander in fact generates such cases. + -- Access_Definition is an optional field that gives support to + -- Ada 2005 (AI-230). The parser generates nodes that have either the + -- Subtype_Indication field or else the Access_Definition field. + + -- N_Component_Definition + -- Sloc points to ALIASED, ACCESS or to first token of subtype mark + -- Aliased_Present (Flag4) + -- Null_Exclusion_Present (Flag11) + -- Subtype_Indication (Node5) (set to Empty if not present) + -- Access_Definition (Node3) (set to Empty if not present) + + ----------------------------- + -- 3.6.1 Index Constraint -- + ----------------------------- + + -- INDEX_CONSTRAINT ::= (DISCRETE_RANGE {, DISCRETE_RANGE}) + + -- It is not in general possible to distinguish between discriminant + -- constraints and index constraints at parse time, since a simple + -- name could be either the subtype mark of a discrete range, or an + -- expression in a discriminant association with no name. Either + -- entry appears simply as the name, and the semantic parse must + -- distinguish between the two cases. Thus we use a common tree + -- node format for both of these constraint types. + + -- See Discriminant_Constraint for format of node + + --------------------------- + -- 3.6.1 Discrete Range -- + --------------------------- + + -- DISCRETE_RANGE ::= discrete_SUBTYPE_INDICATION | RANGE + + ---------------------------- + -- 3.7 Discriminant Part -- + ---------------------------- + + -- DISCRIMINANT_PART ::= + -- UNKNOWN_DISCRIMINANT_PART | KNOWN_DISCRIMINANT_PART + + ------------------------------------ + -- 3.7 Unknown Discriminant Part -- + ------------------------------------ + + -- UNKNOWN_DISCRIMINANT_PART ::= (<>) + + -- Note: unknown discriminant parts are not permitted in Ada 83 mode + + -- There is no explicit node in the tree for an unknown discriminant + -- part. Instead the Unknown_Discriminants_Present flag is set in the + -- parent node. + + ---------------------------------- + -- 3.7 Known Discriminant Part -- + ---------------------------------- + + -- KNOWN_DISCRIMINANT_PART ::= + -- (DISCRIMINANT_SPECIFICATION {; DISCRIMINANT_SPECIFICATION}) + + ------------------------------------- + -- 3.7 Discriminant Specification -- + ------------------------------------- + + -- DISCRIMINANT_SPECIFICATION ::= + -- DEFINING_IDENTIFIER_LIST : [NULL_EXCLUSION] SUBTYPE_MARK + -- [:= DEFAULT_EXPRESSION] + -- | DEFINING_IDENTIFIER_LIST : ACCESS_DEFINITION + -- [:= DEFAULT_EXPRESSION] + + -- Although the syntax allows multiple identifiers in the list, the + -- semantics is as though successive specifications were given with + -- identical type definition and expression components. To simplify + -- semantic processing, the parser represents a multiple declaration + -- case as a sequence of single specifications, using the More_Ids and + -- Prev_Ids flags to preserve the original source form as described + -- in the section on "Handling of Defining Identifier Lists". + + -- N_Discriminant_Specification + -- Sloc points to first identifier + -- Defining_Identifier (Node1) + -- Null_Exclusion_Present (Flag11) + -- Discriminant_Type (Node5) subtype mark or access parameter definition + -- Expression (Node3) (set to Empty if no default expression) + -- More_Ids (Flag5) (set to False if no more identifiers in list) + -- Prev_Ids (Flag6) (set to False if no previous identifiers in list) + + ----------------------------- + -- 3.7 Default Expression -- + ----------------------------- + + -- DEFAULT_EXPRESSION ::= EXPRESSION + + ------------------------------------ + -- 3.7.1 Discriminant Constraint -- + ------------------------------------ + + -- DISCRIMINANT_CONSTRAINT ::= + -- (DISCRIMINANT_ASSOCIATION {, DISCRIMINANT_ASSOCIATION}) + + -- It is not in general possible to distinguish between discriminant + -- constraints and index constraints at parse time, since a simple + -- name could be either the subtype mark of a discrete range, or an + -- expression in a discriminant association with no name. Either + -- entry appears simply as the name, and the semantic parse must + -- distinguish between the two cases. Thus we use a common tree + -- node format for both of these constraint types. + + -- N_Index_Or_Discriminant_Constraint + -- Sloc points to left paren + -- Constraints (List1) points to list of discrete ranges or + -- discriminant associations + + ------------------------------------- + -- 3.7.1 Discriminant Association -- + ------------------------------------- + + -- DISCRIMINANT_ASSOCIATION ::= + -- [discriminant_SELECTOR_NAME + -- {| discriminant_SELECTOR_NAME} =>] EXPRESSION + + -- Note: a discriminant association that has no selector name list + -- appears directly as an expression in the tree. + + -- N_Discriminant_Association + -- Sloc points to first token of discriminant association + -- Selector_Names (List1) (always non-empty, since if no selector + -- names are present, this node is not used, see comment above) + -- Expression (Node3) + + --------------------------------- + -- 3.8 Record Type Definition -- + --------------------------------- + + -- RECORD_TYPE_DEFINITION ::= + -- [[abstract] tagged] [limited] RECORD_DEFINITION + + -- Note: ABSTRACT, TAGGED, LIMITED are not permitted in Ada 83 mode + + -- There is no explicit node in the tree for a record type definition. + -- Instead the flags for Tagged_Present and Limited_Present appear in + -- the N_Record_Definition node for a record definition appearing in + -- the context of a record type definition. + + ---------------------------- + -- 3.8 Record Definition -- + ---------------------------- + + -- RECORD_DEFINITION ::= + -- record + -- COMPONENT_LIST + -- end record + -- | null record + + -- Note: the Abstract_Present, Tagged_Present and Limited_Present + -- flags appear only for a record definition appearing in a record + -- type definition. + + -- Note: the NULL RECORD case is not permitted in Ada 83 + + -- N_Record_Definition + -- Sloc points to RECORD or NULL + -- End_Label (Node4) (set to Empty if internally generated record) + -- Abstract_Present (Flag4) + -- Tagged_Present (Flag15) + -- Limited_Present (Flag17) + -- Component_List (Node1) empty in null record case + -- Null_Present (Flag13) set in null record case + -- Task_Present (Flag5) set in task interfaces + -- Protected_Present (Flag6) set in protected interfaces + -- Synchronized_Present (Flag7) set in interfaces + -- Interface_Present (Flag16) set in abstract interfaces + -- Interface_List (List2) (set to No_List if none) + + -- Note: Task_Present, Protected_Present, Synchronized _Present, + -- Interface_List and Interface_Present are used for abstract + -- interfaces (see comments for INTERFACE_TYPE_DEFINITION). + + ------------------------- + -- 3.8 Component List -- + ------------------------- + + -- COMPONENT_LIST ::= + -- COMPONENT_ITEM {COMPONENT_ITEM} + -- | {COMPONENT_ITEM} VARIANT_PART + -- | null; + + -- N_Component_List + -- Sloc points to first token of component list + -- Component_Items (List3) + -- Variant_Part (Node4) (set to Empty if no variant part) + -- Null_Present (Flag13) + + ------------------------- + -- 3.8 Component Item -- + ------------------------- + + -- COMPONENT_ITEM ::= COMPONENT_DECLARATION | REPRESENTATION_CLAUSE + + -- Note: A component item can also be a pragma, and in the tree + -- that is obtained after semantic processing, a component item + -- can be an N_Null node resulting from a non-recognized pragma. + + -------------------------------- + -- 3.8 Component Declaration -- + -------------------------------- + + -- COMPONENT_DECLARATION ::= + -- DEFINING_IDENTIFIER_LIST : COMPONENT_DEFINITION + -- [:= DEFAULT_EXPRESSION] + + -- Note: although the syntax does not permit a component definition to + -- be an anonymous array (and the parser will diagnose such an attempt + -- with an appropriate message), it is possible for anonymous arrays + -- to appear as component definitions. The semantics and back end handle + -- this case properly, and the expander in fact generates such cases. + + -- Although the syntax allows multiple identifiers in the list, the + -- semantics is as though successive declarations were given with the + -- same component definition and expression components. To simplify + -- semantic processing, the parser represents a multiple declaration + -- case as a sequence of single declarations, using the More_Ids and + -- Prev_Ids flags to preserve the original source form as described + -- in the section on "Handling of Defining Identifier Lists". + + -- N_Component_Declaration + -- Sloc points to first identifier + -- Defining_Identifier (Node1) + -- Component_Definition (Node4) + -- Expression (Node3) (set to Empty if no default expression) + -- More_Ids (Flag5) (set to False if no more identifiers in list) + -- Prev_Ids (Flag6) (set to False if no previous identifiers in list) + + ------------------------- + -- 3.8.1 Variant Part -- + ------------------------- + + -- VARIANT_PART ::= + -- case discriminant_DIRECT_NAME is + -- VARIANT + -- {VARIANT} + -- end case; + + -- Note: the variants list can contain pragmas as well as variants. + -- In a properly formed program there is at least one variant. + + -- N_Variant_Part + -- Sloc points to CASE + -- Name (Node2) + -- Variants (List1) + + -------------------- + -- 3.8.1 Variant -- + -------------------- + + -- VARIANT ::= + -- when DISCRETE_CHOICE_LIST => + -- COMPONENT_LIST + + -- N_Variant + -- Sloc points to WHEN + -- Discrete_Choices (List4) + -- Component_List (Node1) + -- Enclosing_Variant (Node2-Sem) + -- Present_Expr (Uint3-Sem) + -- Dcheck_Function (Node5-Sem) + + --------------------------------- + -- 3.8.1 Discrete Choice List -- + --------------------------------- + + -- DISCRETE_CHOICE_LIST ::= DISCRETE_CHOICE {| DISCRETE_CHOICE} + + ---------------------------- + -- 3.8.1 Discrete Choice -- + ---------------------------- + + -- DISCRETE_CHOICE ::= EXPRESSION | DISCRETE_RANGE | others + + -- Note: in Ada 83 mode, the expression must be a simple expression + + -- The only choice that appears explicitly is the OTHERS choice, as + -- defined here. Other cases of discrete choice (expression and + -- discrete range) appear directly. This production is also used + -- for the OTHERS possibility of an exception choice. + + -- Note: in accordance with the syntax, the parser does not check that + -- OTHERS appears at the end on its own in a choice list context. This + -- is a semantic check. + + -- N_Others_Choice + -- Sloc points to OTHERS + -- Others_Discrete_Choices (List1-Sem) + -- All_Others (Flag11-Sem) + + ---------------------------------- + -- 3.9.1 Record Extension Part -- + ---------------------------------- + + -- RECORD_EXTENSION_PART ::= with RECORD_DEFINITION + + -- Note: record extension parts are not permitted in Ada 83 mode + + -------------------------------------- + -- 3.9.4 Interface Type Definition -- + -------------------------------------- + + -- INTERFACE_TYPE_DEFINITION ::= + -- [limited | task | protected | synchronized] + -- interface [interface_list] + + -- Note: Interfaces are implemented with N_Record_Definition and + -- N_Derived_Type_Definition nodes because most of the support + -- for the analysis of abstract types has been reused to + -- analyze abstract interfaces. + + ---------------------------------- + -- 3.10 Access Type Definition -- + ---------------------------------- + + -- ACCESS_TYPE_DEFINITION ::= + -- ACCESS_TO_OBJECT_DEFINITION + -- | ACCESS_TO_SUBPROGRAM_DEFINITION + + -------------------------- + -- 3.10 Null Exclusion -- + -------------------------- + + -- NULL_EXCLUSION ::= not null + + --------------------------------------- + -- 3.10 Access To Object Definition -- + --------------------------------------- + + -- ACCESS_TO_OBJECT_DEFINITION ::= + -- [NULL_EXCLUSION] access [GENERAL_ACCESS_MODIFIER] + -- SUBTYPE_INDICATION + + -- N_Access_To_Object_Definition + -- Sloc points to ACCESS + -- All_Present (Flag15) + -- Null_Exclusion_Present (Flag11) + -- Subtype_Indication (Node5) + -- Constant_Present (Flag17) + + ----------------------------------- + -- 3.10 General Access Modifier -- + ----------------------------------- + + -- GENERAL_ACCESS_MODIFIER ::= all | constant + + -- Note: general access modifiers are not permitted in Ada 83 mode + + -- There is no explicit node in the tree for general access modifier. + -- Instead the All_Present or Constant_Present flags are set in the + -- parent node. + + ------------------------------------------- + -- 3.10 Access To Subprogram Definition -- + ------------------------------------------- + + -- ACCESS_TO_SUBPROGRAM_DEFINITION + -- [NULL_EXCLUSION] access [protected] procedure PARAMETER_PROFILE + -- | [NULL_EXCLUSION] access [protected] function + -- PARAMETER_AND_RESULT_PROFILE + + -- Note: access to subprograms are not permitted in Ada 83 mode + + -- N_Access_Function_Definition + -- Sloc points to ACCESS + -- Null_Exclusion_Present (Flag11) + -- Protected_Present (Flag6) + -- Parameter_Specifications (List3) (set to No_List if no formal part) + -- Result_Definition (Node4) result subtype (subtype mark or access def) + + -- N_Access_Procedure_Definition + -- Sloc points to ACCESS + -- Null_Exclusion_Present (Flag11) + -- Protected_Present (Flag6) + -- Parameter_Specifications (List3) (set to No_List if no formal part) + + ----------------------------- + -- 3.10 Access Definition -- + ----------------------------- + + -- ACCESS_DEFINITION ::= + -- [NULL_EXCLUSION] access [GENERAL_ACCESS_MODIFIER] SUBTYPE_MARK + -- | ACCESS_TO_SUBPROGRAM_DEFINITION + + -- Note: access to subprograms are an Ada 2005 (AI-254) extension + + -- N_Access_Definition + -- Sloc points to ACCESS + -- Null_Exclusion_Present (Flag11) + -- All_Present (Flag15) + -- Constant_Present (Flag17) + -- Subtype_Mark (Node4) + -- Access_To_Subprogram_Definition (Node3) (set to Empty if not present) + + ----------------------------------------- + -- 3.10.1 Incomplete Type Declaration -- + ----------------------------------------- + + -- INCOMPLETE_TYPE_DECLARATION ::= + -- type DEFINING_IDENTIFIER [DISCRIMINANT_PART] [IS TAGGED]; + + -- N_Incomplete_Type_Declaration + -- Sloc points to TYPE + -- Defining_Identifier (Node1) + -- Discriminant_Specifications (List4) (set to No_List if no + -- discriminant part, or if the discriminant part is an + -- unknown discriminant part) + -- Unknown_Discriminants_Present (Flag13) set if (<>) discriminant + -- Tagged_Present (Flag15) + + ---------------------------- + -- 3.11 Declarative Part -- + ---------------------------- + + -- DECLARATIVE_PART ::= {DECLARATIVE_ITEM} + + -- Note: although the parser enforces the syntactic requirement that + -- a declarative part can contain only declarations, the semantic + -- processing may add statements to the list of actions in a + -- declarative part, so the code generator should be prepared + -- to accept a statement in this position. + + ---------------------------- + -- 3.11 Declarative Item -- + ---------------------------- + + -- DECLARATIVE_ITEM ::= BASIC_DECLARATIVE_ITEM | BODY + + ---------------------------------- + -- 3.11 Basic Declarative Item -- + ---------------------------------- + + -- BASIC_DECLARATIVE_ITEM ::= + -- BASIC_DECLARATION | REPRESENTATION_CLAUSE | USE_CLAUSE + + ---------------- + -- 3.11 Body -- + ---------------- + + -- BODY ::= PROPER_BODY | BODY_STUB + + ----------------------- + -- 3.11 Proper Body -- + ----------------------- + + -- PROPER_BODY ::= + -- SUBPROGRAM_BODY | PACKAGE_BODY | TASK_BODY | PROTECTED_BODY + + --------------- + -- 4.1 Name -- + --------------- + + -- NAME ::= + -- DIRECT_NAME | EXPLICIT_DEREFERENCE + -- | INDEXED_COMPONENT | SLICE + -- | SELECTED_COMPONENT | ATTRIBUTE_REFERENCE + -- | TYPE_CONVERSION | FUNCTION_CALL + -- | CHARACTER_LITERAL + + ---------------------- + -- 4.1 Direct Name -- + ---------------------- + + -- DIRECT_NAME ::= IDENTIFIER | OPERATOR_SYMBOL + + ----------------- + -- 4.1 Prefix -- + ----------------- + + -- PREFIX ::= NAME | IMPLICIT_DEREFERENCE + + ------------------------------- + -- 4.1 Explicit Dereference -- + ------------------------------- + + -- EXPLICIT_DEREFERENCE ::= NAME . all + + -- N_Explicit_Dereference + -- Sloc points to ALL + -- Prefix (Node3) + -- Actual_Designated_Subtype (Node4-Sem) + -- plus fields for expression + + ------------------------------- + -- 4.1 Implicit Dereference -- + ------------------------------- + + -- IMPLICIT_DEREFERENCE ::= NAME + + ------------------------------ + -- 4.1.1 Indexed Component -- + ------------------------------ + + -- INDEXED_COMPONENT ::= PREFIX (EXPRESSION {, EXPRESSION}) + + -- Note: the parser may generate this node in some situations where it + -- should be a function call. The semantic pass must correct this + -- misidentification (which is inevitable at the parser level). + + -- N_Indexed_Component + -- Sloc contains a copy of the Sloc value of the Prefix + -- Prefix (Node3) + -- Expressions (List1) + -- plus fields for expression + + -- Note: if any of the subscripts requires a range check, then the + -- Do_Range_Check flag is set on the corresponding expression, with + -- the index type being determined from the type of the Prefix, which + -- references the array being indexed. + + -- Note: in a fully analyzed and expanded indexed component node, and + -- hence in any such node that gigi sees, if the prefix is an access + -- type, then an explicit dereference operation has been inserted. + + ------------------ + -- 4.1.2 Slice -- + ------------------ + + -- SLICE ::= PREFIX (DISCRETE_RANGE) + + -- Note: an implicit subtype is created to describe the resulting + -- type, so that the bounds of this type are the bounds of the slice. + + -- N_Slice + -- Sloc points to first token of prefix + -- Prefix (Node3) + -- Discrete_Range (Node4) + -- plus fields for expression + + ------------------------------- + -- 4.1.3 Selected Component -- + ------------------------------- + + -- SELECTED_COMPONENT ::= PREFIX . SELECTOR_NAME + + -- Note: selected components that are semantically expanded names get + -- changed during semantic processing into the separate N_Expanded_Name + -- node. See description of this node in the section on semantic nodes. + + -- N_Selected_Component + -- Sloc points to period + -- Prefix (Node3) + -- Selector_Name (Node2) + -- Associated_Node (Node4-Sem) + -- Do_Discriminant_Check (Flag13-Sem) + -- Is_In_Discriminant_Check (Flag11-Sem) + -- plus fields for expression + + -------------------------- + -- 4.1.3 Selector Name -- + -------------------------- + + -- SELECTOR_NAME ::= IDENTIFIER | CHARACTER_LITERAL | OPERATOR_SYMBOL + + -------------------------------- + -- 4.1.4 Attribute Reference -- + -------------------------------- + + -- ATTRIBUTE_REFERENCE ::= PREFIX ' ATTRIBUTE_DESIGNATOR + + -- Note: the syntax is quite ambiguous at this point. Consider: + + -- A'Length (X) X is part of the attribute designator + -- A'Pos (X) X is an explicit actual parameter of function A'Pos + -- A'Class (X) X is the expression of a type conversion + + -- It would be possible for the parser to distinguish these cases + -- by looking at the attribute identifier. However, that would mean + -- more work in introducing new implementation defined attributes, + -- and also it would mean that special processing for attributes + -- would be scattered around, instead of being centralized in the + -- semantic routine that handles an N_Attribute_Reference node. + -- Consequently, the parser in all the above cases stores the + -- expression (X in these examples) as a single element list in + -- in the Expressions field of the N_Attribute_Reference node. + + -- Similarly, for attributes like Max which take two arguments, + -- we store the two arguments as a two element list in the + -- Expressions field. Of course it is clear at parse time that + -- this case is really a function call with an attribute as the + -- prefix, but it turns out to be convenient to handle the two + -- argument case in a similar manner to the one argument case, + -- and indeed in general the parser will accept any number of + -- expressions in this position and store them as a list in the + -- attribute reference node. This allows for future addition of + -- attributes that take more than two arguments. + + -- Note: named associates are not permitted in function calls where + -- the function is an attribute (see RM 6.4(3)) so it is legitimate + -- to skip the normal subprogram argument processing. + + -- Note: for the attributes whose designators are technically keywords, + -- i.e. digits, access, delta, range, the Attribute_Name field contains + -- the corresponding name, even though no identifier is involved. + + -- Note: the generated code may contain stream attributes applied to + -- limited types for which no stream routines exist officially. In such + -- case, the result is to use the stream attribute for the underlying + -- full type, or in the case of a protected type, the components + -- (including any discriminants) are merely streamed in order. + + -- See Exp_Attr for a complete description of which attributes are + -- passed onto Gigi, and which are handled entirely by the front end. + + -- Gigi restriction: For the Pos attribute, the prefix cannot be + -- a non-standard enumeration type or a nonzero/zero semantics + -- boolean type, so the value is simply the stored representation. + + -- Gigi requirement: For the Mechanism_Code attribute, if the prefix + -- references a subprogram that is a renaming, then the front end must + -- rewrite the attribute to refer directly to the renamed entity. + + -- Note: In generated code, the Address and Unrestricted_Access + -- attributes can be applied to any expression, and the meaning is + -- to create an object containing the value (the object is in the + -- current stack frame), and pass the address of this value. If the + -- Must_Be_Byte_Aligned flag is set, then the object whose address + -- is taken must be on a byte (storage unit) boundary, and if it is + -- not (or may not be), then the generated code must create a copy + -- that is byte aligned, and pass the address of this copy. + + -- N_Attribute_Reference + -- Sloc points to apostrophe + -- Prefix (Node3) + -- Attribute_Name (Name2) identifier name from attribute designator + -- Expressions (List1) (set to No_List if no associated expressions) + -- Entity (Node4-Sem) used if the attribute yields a type + -- Associated_Node (Node4-Sem) + -- Do_Overflow_Check (Flag17-Sem) + -- Redundant_Use (Flag13-Sem) + -- Must_Be_Byte_Aligned (Flag14) + -- plus fields for expression + + --------------------------------- + -- 4.1.4 Attribute Designator -- + --------------------------------- + + -- ATTRIBUTE_DESIGNATOR ::= + -- IDENTIFIER [(static_EXPRESSION)] + -- | access | delta | digits + + -- There is no explicit node in the tree for an attribute designator. + -- Instead the Attribute_Name and Expressions fields of the parent + -- node (N_Attribute_Reference node) hold the information. + + -- Note: if ACCESS, DELTA or DIGITS appears in an attribute + -- designator, then they are treated as identifiers internally + -- rather than the keywords of the same name. + + -------------------------------------- + -- 4.1.4 Range Attribute Reference -- + -------------------------------------- + + -- RANGE_ATTRIBUTE_REFERENCE ::= PREFIX ' RANGE_ATTRIBUTE_DESIGNATOR + + -- A range attribute reference is represented in the tree using the + -- normal N_Attribute_Reference node. + + --------------------------------------- + -- 4.1.4 Range Attribute Designator -- + --------------------------------------- + + -- RANGE_ATTRIBUTE_DESIGNATOR ::= Range [(static_EXPRESSION)] + + -- A range attribute designator is represented in the tree using the + -- normal N_Attribute_Reference node. + + -------------------- + -- 4.3 Aggregate -- + -------------------- + + -- AGGREGATE ::= + -- RECORD_AGGREGATE | EXTENSION_AGGREGATE | ARRAY_AGGREGATE + + ----------------------------- + -- 4.3.1 Record Aggregate -- + ----------------------------- + + -- RECORD_AGGREGATE ::= (RECORD_COMPONENT_ASSOCIATION_LIST) + + -- N_Aggregate + -- Sloc points to left parenthesis + -- Expressions (List1) (set to No_List if none or null record case) + -- Component_Associations (List2) (set to No_List if none) + -- Null_Record_Present (Flag17) + -- Aggregate_Bounds (Node3-Sem) + -- Associated_Node (Node4-Sem) + -- Static_Processing_OK (Flag4-Sem) + -- Compile_Time_Known_Aggregate (Flag18-Sem) + -- Expansion_Delayed (Flag11-Sem) + -- Has_Self_Reference (Flag13-Sem) + -- plus fields for expression + + -- Note: this structure is used for both record and array aggregates + -- since the two cases are not separable by the parser. The parser + -- makes no attempt to enforce consistency here, so it is up to the + -- semantic phase to make sure that the aggregate is consistent (i.e. + -- that it is not a "half-and-half" case that mixes record and array + -- syntax. In particular, for a record aggregate, the expressions + -- field will be set if there are positional associations. + + -- Note: N_Aggregate is not used for all aggregates; in particular, + -- there is a separate node kind for extension aggregates. + + -- Note: gigi/gcc can handle array aggregates correctly providing that + -- they are entirely positional, and the array subtype involved has a + -- known at compile time length and is not bit packed, or a convention + -- Fortran array with more than one dimension. If these conditions + -- are not met, then the front end must translate the aggregate into + -- an appropriate set of assignments into a temporary. + + -- Note: for the record aggregate case, gigi/gcc can handle all cases + -- of record aggregates, including those for packed, and rep-claused + -- records, and also variant records, providing that there are no + -- variable length fields whose size is not known at runtime, and + -- providing that the aggregate is presented in fully named form. + + ---------------------------------------------- + -- 4.3.1 Record Component Association List -- + ---------------------------------------------- + + -- RECORD_COMPONENT_ASSOCIATION_LIST ::= + -- RECORD_COMPONENT_ASSOCIATION {, RECORD_COMPONENT_ASSOCIATION} + -- | null record + + -- There is no explicit node in the tree for a record component + -- association list. Instead the Null_Record_Present flag is set in + -- the parent node for the NULL RECORD case. + + ------------------------------------------------------ + -- 4.3.1 Record Component Association (also 4.3.3) -- + ------------------------------------------------------ + + -- RECORD_COMPONENT_ASSOCIATION ::= + -- [COMPONENT_CHOICE_LIST =>] EXPRESSION + + -- N_Component_Association + -- Sloc points to first selector name + -- Choices (List1) + -- Loop_Actions (List2-Sem) + -- Expression (Node3) + -- Box_Present (Flag15) + + -- Note: this structure is used for both record component associations + -- and array component associations, since the two cases aren't always + -- separable by the parser. The choices list may represent either a + -- list of selector names in the record aggregate case, or a list of + -- discrete choices in the array aggregate case or an N_Others_Choice + -- node (which appears as a singleton list). Box_Present gives support + -- to Ada 2005 (AI-287). + + ---------------------------------- + -- 4.3.1 Component Choice List -- + ---------------------------------- + + -- COMPONENT_CHOICE_LIST ::= + -- component_SELECTOR_NAME {| component_SELECTOR_NAME} + -- | others + + -- The entries of a component choice list appear in the Choices list of + -- the associated N_Component_Association, as either selector names, or + -- as an N_Others_Choice node. + + -------------------------------- + -- 4.3.2 Extension Aggregate -- + -------------------------------- + + -- EXTENSION_AGGREGATE ::= + -- (ANCESTOR_PART with RECORD_COMPONENT_ASSOCIATION_LIST) + + -- Note: extension aggregates are not permitted in Ada 83 mode + + -- N_Extension_Aggregate + -- Sloc points to left parenthesis + -- Ancestor_Part (Node3) + -- Associated_Node (Node4-Sem) + -- Expressions (List1) (set to No_List if none or null record case) + -- Component_Associations (List2) (set to No_List if none) + -- Null_Record_Present (Flag17) + -- Expansion_Delayed (Flag11-Sem) + -- Has_Self_Reference (Flag13-Sem) + -- plus fields for expression + + -------------------------- + -- 4.3.2 Ancestor Part -- + -------------------------- + + -- ANCESTOR_PART ::= EXPRESSION | SUBTYPE_MARK + + ---------------------------- + -- 4.3.3 Array Aggregate -- + ---------------------------- + + -- ARRAY_AGGREGATE ::= + -- POSITIONAL_ARRAY_AGGREGATE | NAMED_ARRAY_AGGREGATE + + --------------------------------------- + -- 4.3.3 Positional Array Aggregate -- + --------------------------------------- + + -- POSITIONAL_ARRAY_AGGREGATE ::= + -- (EXPRESSION, EXPRESSION {, EXPRESSION}) + -- | (EXPRESSION {, EXPRESSION}, others => EXPRESSION) + + -- See Record_Aggregate (4.3.1) for node structure + + ---------------------------------- + -- 4.3.3 Named Array Aggregate -- + ---------------------------------- + + -- NAMED_ARRAY_AGGREGATE ::= + -- | (ARRAY_COMPONENT_ASSOCIATION {, ARRAY_COMPONENT_ASSOCIATION}) + + -- See Record_Aggregate (4.3.1) for node structure + + ---------------------------------------- + -- 4.3.3 Array Component Association -- + ---------------------------------------- + + -- ARRAY_COMPONENT_ASSOCIATION ::= + -- DISCRETE_CHOICE_LIST => EXPRESSION + + -- See Record_Component_Association (4.3.1) for node structure + + -------------------------------------------------- + -- 4.4 Expression/Relation/Term/Factor/Primary -- + -------------------------------------------------- + + -- EXPRESSION ::= + -- RELATION {and RELATION} | RELATION {and then RELATION} + -- | RELATION {or RELATION} | RELATION {or else RELATION} + -- | RELATION {xor RELATION} + + -- RELATION ::= + -- SIMPLE_EXPRESSION [RELATIONAL_OPERATOR SIMPLE_EXPRESSION] + -- | SIMPLE_EXPRESSION [not] in RANGE + -- | SIMPLE_EXPRESSION [not] in SUBTYPE_MARK + + -- SIMPLE_EXPRESSION ::= + -- [UNARY_ADDING_OPERATOR] TERM {BINARY_ADDING_OPERATOR TERM} + + -- TERM ::= FACTOR {MULTIPLYING_OPERATOR FACTOR} + + -- FACTOR ::= PRIMARY [** PRIMARY] | abs PRIMARY | not PRIMARY + + -- No nodes are generated for any of these constructs. Instead, the + -- node for the operator appears directly. When we refer to an + -- expression in this description, we mean any of the possible + -- constituent components of an expression (e.g. identifier is + -- an example of an expression). + + ------------------ + -- 4.4 Primary -- + ------------------ + + -- PRIMARY ::= + -- NUMERIC_LITERAL | null + -- | STRING_LITERAL | AGGREGATE + -- | NAME | QUALIFIED_EXPRESSION + -- | ALLOCATOR | (EXPRESSION) + + -- Usually there is no explicit node in the tree for primary. Instead + -- the constituent (e.g. AGGREGATE) appears directly. There are two + -- exceptions. First, there is an explicit node for a null primary. + + -- N_Null + -- Sloc points to NULL + -- plus fields for expression + + -- Second, the case of (EXPRESSION) is handled specially. Ada requires + -- that the parser keep track of which subexpressions are enclosed + -- in parentheses, and how many levels of parentheses are used. This + -- information is required for optimization purposes, and also for + -- some semantic checks (e.g. (((1))) in a procedure spec does not + -- conform with ((((1)))) in the body). + + -- The parentheses are recorded by keeping a Paren_Count field in every + -- subexpression node (it is actually present in all nodes, but only + -- used in subexpression nodes). This count records the number of + -- levels of parentheses. If the number of levels in the source exceeds + -- the maximum accommodated by this count, then the count is simply left + -- at the maximum value. This means that there are some pathological + -- cases of failure to detect conformance failures (e.g. an expression + -- with 500 levels of parens will conform with one with 501 levels), + -- but we do not need to lose sleep over this. + + -- Historical note: in versions of GNAT prior to 1.75, there was a node + -- type N_Parenthesized_Expression used to accurately record unlimited + -- numbers of levels of parentheses. However, it turned out to be a + -- real nuisance to have to take into account the possible presence of + -- this node during semantic analysis, since basically parentheses have + -- zero relevance to semantic analysis. + + -- Note: the level of parentheses always present in things like + -- aggregates does not count, only the parentheses in the primary + -- (EXPRESSION) affect the setting of the Paren_Count field. + + -- 2nd Note: the contents of the Expression field must be ignored (i.e. + -- treated as though it were Empty) if No_Initialization is set True. + + -------------------------------------- + -- 4.5 Short Circuit Control Forms -- + -------------------------------------- + + -- EXPRESSION ::= + -- RELATION {and then RELATION} | RELATION {or else RELATION} + + -- Gigi restriction: For both these control forms, the operand and + -- result types are always Standard.Boolean. The expander inserts the + -- required conversion operations where needed to ensure this is the + -- case. + + -- N_And_Then + -- Sloc points to AND of AND THEN + -- Left_Opnd (Node2) + -- Right_Opnd (Node3) + -- Actions (List1-Sem) + -- plus fields for expression + + -- N_Or_Else + -- Sloc points to OR of OR ELSE + -- Left_Opnd (Node2) + -- Right_Opnd (Node3) + -- Actions (List1-Sem) + -- plus fields for expression + + -- Note: The Actions field is used to hold actions associated with + -- the right hand operand. These have to be treated specially since + -- they are not unconditionally executed. See Insert_Actions for a + -- more detailed description of how these actions are handled. + + --------------------------- + -- 4.5 Membership Tests -- + --------------------------- + + -- RELATION ::= + -- SIMPLE_EXPRESSION [not] in RANGE + -- | SIMPLE_EXPRESSION [not] in SUBTYPE_MARK + + -- Note: although the grammar above allows only a range or a + -- subtype mark, the parser in fact will accept any simple + -- expression in place of a subtype mark. This means that the + -- semantic analyzer must be prepared to deal with, and diagnose + -- a simple expression other than a name for the right operand. + -- This simplifies error recovery in the parser. + + -- N_In + -- Sloc points to IN + -- Left_Opnd (Node2) + -- Right_Opnd (Node3) + -- plus fields for expression + + -- N_Not_In + -- Sloc points to NOT of NOT IN + -- Left_Opnd (Node2) + -- Right_Opnd (Node3) + -- plus fields for expression + + -------------------- + -- 4.5 Operators -- + -------------------- + + -- LOGICAL_OPERATOR ::= and | or | xor + + -- RELATIONAL_OPERATOR ::= = | /= | < | <= | > | >= + + -- BINARY_ADDING_OPERATOR ::= + | - | & + + -- UNARY_ADDING_OPERATOR ::= + | - + + -- MULTIPLYING_OPERATOR ::= * | / | mod | rem + + -- HIGHEST_PRECEDENCE_OPERATOR ::= ** | abs | not + + -- Sprint syntax if Treat_Fixed_As_Integer is set: + + -- x #* y + -- x #/ y + -- x #mod y + -- x #rem y + + -- Gigi restriction: For * / mod rem with fixed-point operands, Gigi + -- will only be given nodes with the Treat_Fixed_As_Integer flag set. + -- All handling of smalls for multiplication and division is handled + -- by the front end (mod and rem result only from expansion). Gigi + -- thus never needs to worry about small values (for other operators + -- operating on fixed-point, e.g. addition, the small value does not + -- have any semantic effect anyway, these are always integer operations. + + -- Gigi restriction: For all operators taking Boolean operands, the + -- type is always Standard.Boolean. The expander inserts the required + -- conversion operations where needed to ensure this is the case. + + -- N_Op_And + -- Sloc points to AND + -- Do_Length_Check (Flag4-Sem) + -- plus fields for binary operator + -- plus fields for expression + + -- N_Op_Or + -- Sloc points to OR + -- Do_Length_Check (Flag4-Sem) + -- plus fields for binary operator + -- plus fields for expression + + -- N_Op_Xor + -- Sloc points to XOR + -- Do_Length_Check (Flag4-Sem) + -- plus fields for binary operator + -- plus fields for expression + + -- N_Op_Eq + -- Sloc points to = + -- plus fields for binary operator + -- plus fields for expression + + -- N_Op_Ne + -- Sloc points to /= + -- plus fields for binary operator + -- plus fields for expression + + -- N_Op_Lt + -- Sloc points to < + -- plus fields for binary operator + -- plus fields for expression + + -- N_Op_Le + -- Sloc points to <= + -- plus fields for binary operator + -- plus fields for expression + + -- N_Op_Gt + -- Sloc points to > + -- plus fields for binary operator + -- plus fields for expression + + -- N_Op_Ge + -- Sloc points to >= + -- plus fields for binary operator + -- plus fields for expression + + -- N_Op_Add + -- Sloc points to + (binary) + -- plus fields for binary operator + -- plus fields for expression + + -- N_Op_Subtract + -- Sloc points to - (binary) + -- plus fields for binary operator + -- plus fields for expression + + -- N_Op_Concat + -- Sloc points to & + -- Is_Component_Left_Opnd (Flag13-Sem) + -- Is_Component_Right_Opnd (Flag14-Sem) + -- plus fields for binary operator + -- plus fields for expression + + -- N_Op_Multiply + -- Sloc points to * + -- Treat_Fixed_As_Integer (Flag14-Sem) + -- Rounded_Result (Flag18-Sem) + -- plus fields for binary operator + -- plus fields for expression + + -- N_Op_Divide + -- Sloc points to / + -- Treat_Fixed_As_Integer (Flag14-Sem) + -- Do_Division_Check (Flag13-Sem) + -- Rounded_Result (Flag18-Sem) + -- plus fields for binary operator + -- plus fields for expression + + -- N_Op_Mod + -- Sloc points to MOD + -- Treat_Fixed_As_Integer (Flag14-Sem) + -- Do_Division_Check (Flag13-Sem) + -- plus fields for binary operator + -- plus fields for expression + + -- N_Op_Rem + -- Sloc points to REM + -- Treat_Fixed_As_Integer (Flag14-Sem) + -- Do_Division_Check (Flag13-Sem) + -- plus fields for binary operator + -- plus fields for expression + + -- N_Op_Expon + -- Is_Power_Of_2_For_Shift (Flag13-Sem) + -- Sloc points to ** + -- plus fields for binary operator + -- plus fields for expression + + -- N_Op_Plus + -- Sloc points to + (unary) + -- plus fields for unary operator + -- plus fields for expression + + -- N_Op_Minus + -- Sloc points to - (unary) + -- plus fields for unary operator + -- plus fields for expression + + -- N_Op_Abs + -- Sloc points to ABS + -- plus fields for unary operator + -- plus fields for expression + + -- N_Op_Not + -- Sloc points to NOT + -- plus fields for unary operator + -- plus fields for expression + + -- See also shift operators in section B.2 + + -- Note on fixed-point operations passed to Gigi: For adding operators, + -- the semantics is to treat these simply as integer operations, with + -- the small values being ignored (the bounds are already stored in + -- units of small, so that constraint checking works as usual). For the + -- case of multiply/divide/rem/mod operations, Gigi will only see fixed + -- point operands if the Treat_Fixed_As_Integer flag is set and will + -- thus treat these nodes in identical manner, ignoring small values. + + -------------------------- + -- 4.6 Type Conversion -- + -------------------------- + + -- TYPE_CONVERSION ::= + -- SUBTYPE_MARK (EXPRESSION) | SUBTYPE_MARK (NAME) + + -- In the (NAME) case, the name is stored as the expression + + -- Note: the parser never generates a type conversion node, since it + -- looks like an indexed component which is generated by preference. + -- The semantic pass must correct this misidentification. + + -- Gigi handles conversions that involve no change in the root type, + -- and also all conversions from integer to floating-point types. + -- Conversions from floating-point to integer are only handled in + -- the case where Float_Truncate flag set. Other conversions from + -- floating-point to integer (involving rounding) and all conversions + -- involving fixed-point types are handled by the expander. + + -- Sprint syntax if Float_Truncate set: X^(Y) + -- Sprint syntax if Conversion_OK set X?(Y) + -- Sprint syntax if both flags set X?^(Y) + + -- Note: If either the operand or result type is fixed-point, Gigi will + -- only see a type conversion node with Conversion_OK set. The front end + -- takes care of all handling of small's for fixed-point conversions. + + -- N_Type_Conversion + -- Sloc points to first token of subtype mark + -- Subtype_Mark (Node4) + -- Expression (Node3) + -- Do_Tag_Check (Flag13-Sem) + -- Do_Length_Check (Flag4-Sem) + -- Do_Overflow_Check (Flag17-Sem) + -- Float_Truncate (Flag11-Sem) + -- Rounded_Result (Flag18-Sem) + -- Conversion_OK (Flag14-Sem) + -- plus fields for expression + + -- Note: if a range check is required, then the Do_Range_Check flag + -- is set in the Expression with the check being done against the + -- target type range (after the base type conversion, if any). + + ------------------------------- + -- 4.7 Qualified Expression -- + ------------------------------- + + -- QUALIFIED_EXPRESSION ::= + -- SUBTYPE_MARK ' (EXPRESSION) | SUBTYPE_MARK ' AGGREGATE + + -- Note: the parentheses in the (EXPRESSION) case are deemed to enclose + -- the expression, so the Expression field of this node always points + -- to a parenthesized expression in this case (i.e. Paren_Count will + -- always be non-zero for the referenced expression if it is not an + -- aggregate). + + -- N_Qualified_Expression + -- Sloc points to apostrophe + -- Subtype_Mark (Node4) + -- Expression (Node3) expression or aggregate + -- plus fields for expression + + -------------------- + -- 4.8 Allocator -- + -------------------- + + -- ALLOCATOR ::= + -- new [NULL_EXCLUSION] SUBTYPE_INDICATION | new QUALIFIED_EXPRESSION + + -- Sprint syntax (when storage pool present) + -- new xxx (storage_pool = pool) + + -- N_Allocator + -- Sloc points to NEW + -- Expression (Node3) subtype indication or qualified expression + -- Storage_Pool (Node1-Sem) + -- Procedure_To_Call (Node2-Sem) + -- Coextensions (Elist4-Sem) + -- Null_Exclusion_Present (Flag11) + -- No_Initialization (Flag13-Sem) + -- Is_Static_Coextension (Flag14-Sem) + -- Do_Storage_Check (Flag17-Sem) + -- Is_Dynamic_Coextension (Flag18-Sem) + -- plus fields for expression + + --------------------------------- + -- 5.1 Sequence Of Statements -- + --------------------------------- + + -- SEQUENCE_OF_STATEMENTS ::= STATEMENT {STATEMENT} + + -- Note: Although the parser will not accept a declaration as a + -- statement, the semantic analyzer may insert declarations (e.g. + -- declarations of implicit types needed for execution of other + -- statements) into a sequence of statements, so the code generator + -- should be prepared to accept a declaration where a statement is + -- expected. Note also that pragmas can appear as statements. + + -------------------- + -- 5.1 Statement -- + -------------------- + + -- STATEMENT ::= + -- {LABEL} SIMPLE_STATEMENT | {LABEL} COMPOUND_STATEMENT + + -- There is no explicit node in the tree for a statement. Instead, the + -- individual statement appears directly. Labels are treated as a + -- kind of statement, i.e. they are linked into a statement list at + -- the point they appear, so the labeled statement appears following + -- the label or labels in the statement list. + + --------------------------- + -- 5.1 Simple Statement -- + --------------------------- + + -- SIMPLE_STATEMENT ::= NULL_STATEMENT + -- | ASSIGNMENT_STATEMENT | EXIT_STATEMENT + -- | GOTO_STATEMENT | PROCEDURE_CALL_STATEMENT + -- | SIMPLE_RETURN_STATEMENT | ENTRY_CALL_STATEMENT + -- | REQUEUE_STATEMENT | DELAY_STATEMENT + -- | ABORT_STATEMENT | RAISE_STATEMENT + -- | CODE_STATEMENT + + ----------------------------- + -- 5.1 Compound Statement -- + ----------------------------- + + -- COMPOUND_STATEMENT ::= + -- IF_STATEMENT | CASE_STATEMENT + -- | LOOP_STATEMENT | BLOCK_STATEMENT + -- | EXTENDED_RETURN_STATEMENT + -- | ACCEPT_STATEMENT | SELECT_STATEMENT + + ------------------------- + -- 5.1 Null Statement -- + ------------------------- + + -- NULL_STATEMENT ::= null; + + -- N_Null_Statement + -- Sloc points to NULL + + ---------------- + -- 5.1 Label -- + ---------------- + + -- LABEL ::= <<label_STATEMENT_IDENTIFIER>> + + -- Note that the occurrence of a label is not a defining identifier, + -- but rather a referencing occurrence. The defining occurrence is + -- in the implicit label declaration which occurs in the innermost + -- enclosing block. + + -- N_Label + -- Sloc points to << + -- Identifier (Node1) direct name of statement identifier + -- Exception_Junk (Flag8-Sem) + + ------------------------------- + -- 5.1 Statement Identifier -- + ------------------------------- + + -- STATEMENT_IDENTIFIER ::= DIRECT_NAME + + -- The IDENTIFIER of a STATEMENT_IDENTIFIER shall be an identifier + -- (not an OPERATOR_SYMBOL) + + ------------------------------- + -- 5.2 Assignment Statement -- + ------------------------------- + + -- ASSIGNMENT_STATEMENT ::= + -- variable_NAME := EXPRESSION; + + -- N_Assignment_Statement + -- Sloc points to := + -- Name (Node2) + -- Expression (Node3) + -- Do_Tag_Check (Flag13-Sem) + -- Do_Length_Check (Flag4-Sem) + -- Forwards_OK (Flag5-Sem) + -- Backwards_OK (Flag6-Sem) + -- No_Ctrl_Actions (Flag7-Sem) + + -- Note: if a range check is required, then the Do_Range_Check flag + -- is set in the Expression (right hand side), with the check being + -- done against the type of the Name (left hand side). + + -- Note: the back end places some restrictions on the form of the + -- Expression field. If the object being assigned to is Atomic, then + -- the Expression may not have the form of an aggregate (since this + -- might cause the back end to generate separate assignments). It + -- also cannot be a reference to an object marked as a true constant + -- (Is_True_Constant flag set), where the object is itself initialized + -- with an aggregate. If necessary the front end must generate an + -- extra temporary (with Is_True_Constant set False), and initialize + -- this temporary as required (the temporary itself is not atomic). + + ----------------------- + -- 5.3 If Statement -- + ----------------------- + + -- IF_STATEMENT ::= + -- if CONDITION then + -- SEQUENCE_OF_STATEMENTS + -- {elsif CONDITION then + -- SEQUENCE_OF_STATEMENTS} + -- [else + -- SEQUENCE_OF_STATEMENTS] + -- end if; + + -- Gigi restriction: This expander ensures that the type of the + -- Condition fields is always Standard.Boolean, even if the type + -- in the source is some non-standard boolean type. + + -- N_If_Statement + -- Sloc points to IF + -- Condition (Node1) + -- Then_Statements (List2) + -- Elsif_Parts (List3) (set to No_List if none present) + -- Else_Statements (List4) (set to No_List if no else part present) + -- End_Span (Uint5) (set to No_Uint if expander generated) + + -- N_Elsif_Part + -- Sloc points to ELSIF + -- Condition (Node1) + -- Then_Statements (List2) + -- Condition_Actions (List3-Sem) + + -------------------- + -- 5.3 Condition -- + -------------------- + + -- CONDITION ::= boolean_EXPRESSION + + ------------------------- + -- 5.4 Case Statement -- + ------------------------- + + -- CASE_STATEMENT ::= + -- case EXPRESSION is + -- CASE_STATEMENT_ALTERNATIVE + -- {CASE_STATEMENT_ALTERNATIVE} + -- end case; + + -- Note: the Alternatives can contain pragmas. These only occur at + -- the start of the list, since any pragmas occurring after the first + -- alternative are absorbed into the corresponding statement sequence. + + -- N_Case_Statement + -- Sloc points to CASE + -- Expression (Node3) + -- Alternatives (List4) + -- End_Span (Uint5) (set to No_Uint if expander generated) + + ------------------------------------- + -- 5.4 Case Statement Alternative -- + ------------------------------------- + + -- CASE_STATEMENT_ALTERNATIVE ::= + -- when DISCRETE_CHOICE_LIST => + -- SEQUENCE_OF_STATEMENTS + + -- N_Case_Statement_Alternative + -- Sloc points to WHEN + -- Discrete_Choices (List4) + -- Statements (List3) + + ------------------------- + -- 5.5 Loop Statement -- + ------------------------- + + -- LOOP_STATEMENT ::= + -- [loop_STATEMENT_IDENTIFIER :] + -- [ITERATION_SCHEME] loop + -- SEQUENCE_OF_STATEMENTS + -- end loop [loop_IDENTIFIER]; + + -- Note: The occurrence of a loop label is not a defining identifier + -- but rather a referencing occurrence. The defining occurrence is in + -- the implicit label declaration which occurs in the innermost + -- enclosing block. + + -- Note: there is always a loop statement identifier present in + -- the tree, even if none was given in the source. In the case where + -- no loop identifier is given in the source, the parser creates + -- a name of the form _Loop_n, where n is a decimal integer (the + -- two underlines ensure that the loop names created in this manner + -- do not conflict with any user defined identifiers), and the flag + -- Has_Created_Identifier is set to True. The only exception to the + -- rule that all loop statement nodes have identifiers occurs for + -- loops constructed by the expander, and the semantic analyzer will + -- create and supply dummy loop identifiers in these cases. + + -- N_Loop_Statement + -- Sloc points to LOOP + -- Identifier (Node1) loop identifier (set to Empty if no identifier) + -- Iteration_Scheme (Node2) (set to Empty if no iteration scheme) + -- Statements (List3) + -- End_Label (Node4) + -- Has_Created_Identifier (Flag15) + -- Is_Null_Loop (Flag16) + + -------------------------- + -- 5.5 Iteration Scheme -- + -------------------------- + + -- ITERATION_SCHEME ::= + -- while CONDITION | for LOOP_PARAMETER_SPECIFICATION + + -- Gigi restriction: This expander ensures that the type of the + -- Condition field is always Standard.Boolean, even if the type + -- in the source is some non-standard boolean type. + + -- N_Iteration_Scheme + -- Sloc points to WHILE or FOR + -- Condition (Node1) (set to Empty if FOR case) + -- Condition_Actions (List3-Sem) + -- Loop_Parameter_Specification (Node4) (set to Empty if WHILE case) + + --------------------------------------- + -- 5.5 Loop parameter specification -- + --------------------------------------- + + -- LOOP_PARAMETER_SPECIFICATION ::= + -- DEFINING_IDENTIFIER in [reverse] DISCRETE_SUBTYPE_DEFINITION + + -- N_Loop_Parameter_Specification + -- Sloc points to first identifier + -- Defining_Identifier (Node1) + -- Reverse_Present (Flag15) + -- Discrete_Subtype_Definition (Node4) + + -------------------------- + -- 5.6 Block Statement -- + -------------------------- + + -- BLOCK_STATEMENT ::= + -- [block_STATEMENT_IDENTIFIER:] + -- [declare + -- DECLARATIVE_PART] + -- begin + -- HANDLED_SEQUENCE_OF_STATEMENTS + -- end [block_IDENTIFIER]; + + -- Note that the occurrence of a block identifier is not a defining + -- identifier, but rather a referencing occurrence. The defining + -- occurrence is an E_Block entity declared by the implicit label + -- declaration which occurs in the innermost enclosing block statement + -- or body; the block identifier denotes that E_Block. + + -- For block statements that come from source code, there is always a + -- block statement identifier present in the tree, denoting an + -- E_Block. In the case where no block identifier is given in the + -- source, the parser creates a name of the form B_n, where n is a + -- decimal integer, and the flag Has_Created_Identifier is set to + -- True. Blocks constructed by the expander usually have no identifier, + -- and no corresponding entity. + + -- Note: the block statement created for an extended return statement + -- has an entity, and this entity is an E_Return_Statement, rather than + -- the usual E_Block. + + -- Note: Exception_Junk is set for the wrapping blocks created during + -- local raise optimization (Exp_Ch11.Expand_Local_Exception_Handlers). + + -- N_Block_Statement + -- Sloc points to DECLARE or BEGIN + -- Identifier (Node1) block direct name (set to Empty if not present) + -- Declarations (List2) (set to No_List if no DECLARE part) + -- Handled_Statement_Sequence (Node4) + -- Is_Task_Master (Flag5-Sem) + -- Activation_Chain_Entity (Node3-Sem) + -- Has_Created_Identifier (Flag15) + -- Is_Task_Allocation_Block (Flag6) + -- Is_Asynchronous_Call_Block (Flag7) + -- Exception_Junk (Flag8-Sem) + + ------------------------- + -- 5.7 Exit Statement -- + ------------------------- + + -- EXIT_STATEMENT ::= exit [loop_NAME] [when CONDITION]; + + -- Gigi restriction: This expander ensures that the type of the + -- Condition field is always Standard.Boolean, even if the type + -- in the source is some non-standard boolean type. + + -- N_Exit_Statement + -- Sloc points to EXIT + -- Name (Node2) (set to Empty if no loop name present) + -- Condition (Node1) (set to Empty if no when part present) + + ------------------------- + -- 5.9 Goto Statement -- + ------------------------- + + -- GOTO_STATEMENT ::= goto label_NAME; + + -- N_Goto_Statement + -- Sloc points to GOTO + -- Name (Node2) + -- Exception_Junk (Flag8-Sem) + + --------------------------------- + -- 6.1 Subprogram Declaration -- + --------------------------------- + + -- SUBPROGRAM_DECLARATION ::= SUBPROGRAM_SPECIFICATION; + + -- N_Subprogram_Declaration + -- Sloc points to FUNCTION or PROCEDURE + -- Specification (Node1) + -- Body_To_Inline (Node3-Sem) + -- Corresponding_Body (Node5-Sem) + -- Parent_Spec (Node4-Sem) + + ------------------------------------------ + -- 6.1 Abstract Subprogram Declaration -- + ------------------------------------------ + + -- ABSTRACT_SUBPROGRAM_DECLARATION ::= + -- SUBPROGRAM_SPECIFICATION is abstract; + + -- N_Abstract_Subprogram_Declaration + -- Sloc points to ABSTRACT + -- Specification (Node1) + + ----------------------------------- + -- 6.1 Subprogram Specification -- + ----------------------------------- + + -- SUBPROGRAM_SPECIFICATION ::= + -- [[not] overriding] + -- procedure DEFINING_PROGRAM_UNIT_NAME PARAMETER_PROFILE + -- | [[not] overriding] + -- function DEFINING_DESIGNATOR PARAMETER_AND_RESULT_PROFILE + + -- Note: there are no separate nodes for the profiles, instead the + -- information appears directly in the following nodes. + + -- N_Function_Specification + -- Sloc points to FUNCTION + -- Defining_Unit_Name (Node1) (the designator) + -- Elaboration_Boolean (Node2-Sem) + -- Parameter_Specifications (List3) (set to No_List if no formal part) + -- Null_Exclusion_Present (Flag11) + -- Result_Definition (Node4) for result subtype + -- Generic_Parent (Node5-Sem) + -- Must_Override (Flag14) set if overriding indicator present + -- Must_Not_Override (Flag15) set if not_overriding indicator present + + -- N_Procedure_Specification + -- Sloc points to PROCEDURE + -- Defining_Unit_Name (Node1) + -- Elaboration_Boolean (Node2-Sem) + -- Parameter_Specifications (List3) (set to No_List if no formal part) + -- Generic_Parent (Node5-Sem) + -- Null_Present (Flag13) set for null procedure case (Ada 2005 feature) + -- Must_Override (Flag14) set if overriding indicator present + -- Must_Not_Override (Flag15) set if not_overriding indicator present + + -- Note: overriding indicator is an Ada 2005 feature + + --------------------- + -- 6.1 Designator -- + --------------------- + + -- DESIGNATOR ::= + -- [PARENT_UNIT_NAME .] IDENTIFIER | OPERATOR_SYMBOL + + -- Designators that are simply identifiers or operator symbols appear + -- directly in the tree in this form. The following node is used only + -- in the case where the designator has a parent unit name component. + + -- N_Designator + -- Sloc points to period + -- Name (Node2) holds the parent unit name. Note that this is always + -- non-Empty, since this node is only used for the case where a + -- parent library unit package name is present. + -- Identifier (Node1) + + -- Note that the identifier can also be an operator symbol here + + ------------------------------ + -- 6.1 Defining Designator -- + ------------------------------ + + -- DEFINING_DESIGNATOR ::= + -- DEFINING_PROGRAM_UNIT_NAME | DEFINING_OPERATOR_SYMBOL + + ------------------------------------- + -- 6.1 Defining Program Unit Name -- + ------------------------------------- + + -- DEFINING_PROGRAM_UNIT_NAME ::= + -- [PARENT_UNIT_NAME .] DEFINING_IDENTIFIER + + -- The parent unit name is present only in the case of a child unit + -- name (permissible only for Ada 95 for a library level unit, i.e. + -- a unit at scope level one). If no such name is present, the defining + -- program unit name is represented simply as the defining identifier. + -- In the child unit case, the following node is used to represent the + -- child unit name. + + -- N_Defining_Program_Unit_Name + -- Sloc points to period + -- Name (Node2) holds the parent unit name. Note that this is always + -- non-Empty, since this node is only used for the case where a + -- parent unit name is present. + -- Defining_Identifier (Node1) + + -------------------------- + -- 6.1 Operator Symbol -- + -------------------------- + + -- OPERATOR_SYMBOL ::= STRING_LITERAL + + -- Note: the fields of the N_Operator_Symbol node are laid out to + -- match the corresponding fields of an N_Character_Literal node. This + -- allows easy conversion of the operator symbol node into a character + -- literal node in the case where a string constant of the form of an + -- operator symbol is scanned out as such, but turns out semantically + -- to be a string literal that is not an operator. For details see + -- Sinfo.CN.Change_Operator_Symbol_To_String_Literal. + + -- N_Operator_Symbol + -- Sloc points to literal + -- Chars (Name1) contains the Name_Id for the operator symbol + -- Strval (Str3) Id of string value. This is used if the operator + -- symbol turns out to be a normal string after all. + -- Entity (Node4-Sem) + -- Associated_Node (Node4-Sem) + -- Has_Private_View (Flag11-Sem) set in generic units. + -- Etype (Node5-Sem) + + -- Note: the Strval field may be set to No_String for generated + -- operator symbols that are known not to be string literals + -- semantically. + + ----------------------------------- + -- 6.1 Defining Operator Symbol -- + ----------------------------------- + + -- DEFINING_OPERATOR_SYMBOL ::= OPERATOR_SYMBOL + + -- A defining operator symbol is an entity, which has additional + -- fields depending on the setting of the Ekind field. These + -- additional fields are defined (and access subprograms declared) + -- in package Einfo. + + -- Note: N_Defining_Operator_Symbol is an extended node whose fields + -- are deliberately layed out to match the layout of fields in an + -- ordinary N_Operator_Symbol node allowing for easy alteration of + -- an operator symbol node into a defining operator symbol node. + -- See Sinfo.CN.Change_Operator_Symbol_To_Defining_Operator_Symbol + -- for further details. + + -- N_Defining_Operator_Symbol + -- Sloc points to literal + -- Chars (Name1) contains the Name_Id for the operator symbol + -- Next_Entity (Node2-Sem) + -- Scope (Node3-Sem) + -- Etype (Node5-Sem) + + ---------------------------- + -- 6.1 Parameter Profile -- + ---------------------------- + + -- PARAMETER_PROFILE ::= [FORMAL_PART] + + --------------------------------------- + -- 6.1 Parameter and Result Profile -- + --------------------------------------- + + -- PARAMETER_AND_RESULT_PROFILE ::= + -- [FORMAL_PART] return [NULL_EXCLUSION] SUBTYPE_MARK + -- | [FORMAL_PART] return ACCESS_DEFINITION + + -- There is no explicit node in the tree for a parameter and result + -- profile. Instead the information appears directly in the parent. + + ---------------------- + -- 6.1 Formal part -- + ---------------------- + + -- FORMAL_PART ::= + -- (PARAMETER_SPECIFICATION {; PARAMETER_SPECIFICATION}) + + ---------------------------------- + -- 6.1 Parameter specification -- + ---------------------------------- + + -- PARAMETER_SPECIFICATION ::= + -- DEFINING_IDENTIFIER_LIST : MODE [NULL_EXCLUSION] SUBTYPE_MARK + -- [:= DEFAULT_EXPRESSION] + -- | DEFINING_IDENTIFIER_LIST : ACCESS_DEFINITION + -- [:= DEFAULT_EXPRESSION] + + -- Although the syntax allows multiple identifiers in the list, the + -- semantics is as though successive specifications were given with + -- identical type definition and expression components. To simplify + -- semantic processing, the parser represents a multiple declaration + -- case as a sequence of single Specifications, using the More_Ids and + -- Prev_Ids flags to preserve the original source form as described + -- in the section on "Handling of Defining Identifier Lists". + + -- N_Parameter_Specification + -- Sloc points to first identifier + -- Defining_Identifier (Node1) + -- In_Present (Flag15) + -- Out_Present (Flag17) + -- Null_Exclusion_Present (Flag11) + -- Parameter_Type (Node2) subtype mark or access definition + -- Expression (Node3) (set to Empty if no default expression present) + -- Do_Accessibility_Check (Flag13-Sem) + -- More_Ids (Flag5) (set to False if no more identifiers in list) + -- Prev_Ids (Flag6) (set to False if no previous identifiers in list) + -- Default_Expression (Node5-Sem) + + --------------- + -- 6.1 Mode -- + --------------- + + -- MODE ::= [in] | in out | out + + -- There is no explicit node in the tree for the Mode. Instead the + -- In_Present and Out_Present flags are set in the parent node to + -- record the presence of keywords specifying the mode. + + -------------------------- + -- 6.3 Subprogram Body -- + -------------------------- + + -- SUBPROGRAM_BODY ::= + -- SUBPROGRAM_SPECIFICATION is + -- DECLARATIVE_PART + -- begin + -- HANDLED_SEQUENCE_OF_STATEMENTS + -- end [DESIGNATOR]; + + -- N_Subprogram_Body + -- Sloc points to FUNCTION or PROCEDURE + -- Specification (Node1) + -- Declarations (List2) + -- Handled_Statement_Sequence (Node4) + -- Activation_Chain_Entity (Node3-Sem) + -- Corresponding_Spec (Node5-Sem) + -- Acts_As_Spec (Flag4-Sem) + -- Bad_Is_Detected (Flag15) used only by parser + -- Do_Storage_Check (Flag17-Sem) + -- Has_Priority_Pragma (Flag6-Sem) + -- Is_Protected_Subprogram_Body (Flag7-Sem) + -- Is_Entry_Barrier_Function (Flag8-Sem) + -- Is_Task_Master (Flag5-Sem) + -- Was_Originally_Stub (Flag13-Sem) + -- Has_Relative_Deadline_Pragma (Flag9-Sem) + + ----------------------------------- + -- 6.4 Procedure Call Statement -- + ----------------------------------- + + -- PROCEDURE_CALL_STATEMENT ::= + -- procedure_NAME; | procedure_PREFIX ACTUAL_PARAMETER_PART; + + -- Note: the reason that a procedure call has expression fields is + -- that it semantically resembles an expression, e.g. overloading is + -- allowed and a type is concocted for semantic processing purposes. + -- Certain of these fields, such as Parens are not relevant, but it + -- is easier to just supply all of them together! + + -- N_Procedure_Call_Statement + -- Sloc points to first token of name or prefix + -- Name (Node2) stores name or prefix + -- Parameter_Associations (List3) (set to No_List if no + -- actual parameter part) + -- First_Named_Actual (Node4-Sem) + -- Controlling_Argument (Node1-Sem) (set to Empty if not dispatching) + -- Do_Tag_Check (Flag13-Sem) + -- No_Elaboration_Check (Flag14-Sem) + -- Parameter_List_Truncated (Flag17-Sem) + -- ABE_Is_Certain (Flag18-Sem) + -- plus fields for expression + + -- If any IN parameter requires a range check, then the corresponding + -- argument expression has the Do_Range_Check flag set, and the range + -- check is done against the formal type. Note that this argument + -- expression may appear directly in the Parameter_Associations list, + -- or may be a descendent of an N_Parameter_Association node that + -- appears in this list. + + ------------------------ + -- 6.4 Function Call -- + ------------------------ + + -- FUNCTION_CALL ::= + -- function_NAME | function_PREFIX ACTUAL_PARAMETER_PART + + -- Note: the parser may generate an indexed component node or simply + -- a name node instead of a function call node. The semantic pass must + -- correct this misidentification. + + -- N_Function_Call + -- Sloc points to first token of name or prefix + -- Name (Node2) stores name or prefix + -- Parameter_Associations (List3) (set to No_List if no + -- actual parameter part) + -- First_Named_Actual (Node4-Sem) + -- Controlling_Argument (Node1-Sem) (set to Empty if not dispatching) + -- Is_Expanded_Build_In_Place_Call (Flag11-Sem) + -- Do_Tag_Check (Flag13-Sem) + -- No_Elaboration_Check (Flag14-Sem) + -- Parameter_List_Truncated (Flag17-Sem) + -- ABE_Is_Certain (Flag18-Sem) + -- plus fields for expression + + -------------------------------- + -- 6.4 Actual Parameter Part -- + -------------------------------- + + -- ACTUAL_PARAMETER_PART ::= + -- (PARAMETER_ASSOCIATION {,PARAMETER_ASSOCIATION}) + + -------------------------------- + -- 6.4 Parameter Association -- + -------------------------------- + + -- PARAMETER_ASSOCIATION ::= + -- [formal_parameter_SELECTOR_NAME =>] EXPLICIT_ACTUAL_PARAMETER + + -- Note: the N_Parameter_Association node is built only if a formal + -- parameter selector name is present, otherwise the parameter + -- association appears in the tree simply as the node for the + -- explicit actual parameter. + + -- N_Parameter_Association + -- Sloc points to formal parameter + -- Selector_Name (Node2) (always non-Empty) + -- Explicit_Actual_Parameter (Node3) + -- Next_Named_Actual (Node4-Sem) + + --------------------------- + -- 6.4 Actual Parameter -- + --------------------------- + + -- EXPLICIT_ACTUAL_PARAMETER ::= EXPRESSION | variable_NAME + + --------------------------- + -- 6.5 Return Statement -- + --------------------------- + + -- RETURN_STATEMENT ::= return [EXPRESSION]; -- Ada 95 + + -- In Ada 2005, we have: + + -- SIMPLE_RETURN_STATEMENT ::= return [EXPRESSION]; + + -- EXTENDED_RETURN_STATEMENT ::= + -- return DEFINING_IDENTIFIER : [aliased] RETURN_SUBTYPE_INDICATION + -- [:= EXPRESSION] [do + -- HANDLED_SEQUENCE_OF_STATEMENTS + -- end return]; + + -- RETURN_SUBTYPE_INDICATION ::= SUBTYPE_INDICATION | ACCESS_DEFINITION + + -- So in Ada 2005, RETURN_STATEMENT is no longer a nonterminal, but + -- "return statement" is defined in 6.5 to mean a + -- SIMPLE_RETURN_STATEMENT or an EXTENDED_RETURN_STATEMENT. + + -- N_Return_Statement + -- Sloc points to RETURN + -- Return_Statement_Entity (Node5-Sem) + -- Expression (Node3) (set to Empty if no expression present) + -- Storage_Pool (Node1-Sem) + -- Procedure_To_Call (Node2-Sem) + -- Do_Tag_Check (Flag13-Sem) + -- By_Ref (Flag5-Sem) + -- Comes_From_Extended_Return_Statement (Flag18-Sem) + + -- N_Return_Statement represents a simple_return_statement, and is + -- renamed to be N_Simple_Return_Statement below. Clients should refer + -- to N_Simple_Return_Statement. We retain N_Return_Statement because + -- that's how gigi knows it. See also renaming of Make_Return_Statement + -- as Make_Simple_Return_Statement in Sem_Util. + + -- Note: Return_Statement_Entity points to an E_Return_Statement + + -- If a range check is required, then Do_Range_Check is set on the + -- Expression. The check is against the return subtype of the function. + + -- N_Extended_Return_Statement + -- Sloc points to RETURN + -- Return_Statement_Entity (Node5-Sem) + -- Return_Object_Declarations (List3) + -- Handled_Statement_Sequence (Node4) (set to Empty if not present) + -- Storage_Pool (Node1-Sem) + -- Procedure_To_Call (Node2-Sem) + -- Do_Tag_Check (Flag13-Sem) + -- By_Ref (Flag5-Sem) + + -- Note: Return_Statement_Entity points to an E_Return_Statement. + -- Note that Return_Object_Declarations is a list containing the + -- N_Object_Declaration -- see comment on this field above. + -- The declared object will have Is_Return_Object = True. + -- There is no such syntactic category as return_object_declaration + -- in the RM. Return_Object_Declarations represents this portion of + -- the syntax for EXTENDED_RETURN_STATEMENT: + -- DEFINING_IDENTIFIER : [aliased] RETURN_SUBTYPE_INDICATION + -- [:= EXPRESSION] + + -- There are two entities associated with an extended_return_statement: + -- the Return_Statement_Entity represents the statement itself, and the + -- Defining_Identifier of the Object_Declaration in + -- Return_Object_Declarations represents the object being + -- returned. N_Simple_Return_Statement has only the former. + + ------------------------------ + -- 7.1 Package Declaration -- + ------------------------------ + + -- PACKAGE_DECLARATION ::= PACKAGE_SPECIFICATION; + + -- Note: the activation chain entity for a package spec is used for + -- all tasks declared in the package spec, or in the package body. + + -- N_Package_Declaration + -- Sloc points to PACKAGE + -- Specification (Node1) + -- Corresponding_Body (Node5-Sem) + -- Parent_Spec (Node4-Sem) + -- Activation_Chain_Entity (Node3-Sem) + + -------------------------------- + -- 7.1 Package Specification -- + -------------------------------- + + -- PACKAGE_SPECIFICATION ::= + -- package DEFINING_PROGRAM_UNIT_NAME is + -- {BASIC_DECLARATIVE_ITEM} + -- [private + -- {BASIC_DECLARATIVE_ITEM}] + -- end [[PARENT_UNIT_NAME .] IDENTIFIER] + + -- N_Package_Specification + -- Sloc points to PACKAGE + -- Defining_Unit_Name (Node1) + -- Visible_Declarations (List2) + -- Private_Declarations (List3) (set to No_List if no private + -- part present) + -- End_Label (Node4) + -- Generic_Parent (Node5-Sem) + -- Limited_View_Installed (Flag18-Sem) + + ----------------------- + -- 7.1 Package Body -- + ----------------------- + + -- PACKAGE_BODY ::= + -- package body DEFINING_PROGRAM_UNIT_NAME is + -- DECLARATIVE_PART + -- [begin + -- HANDLED_SEQUENCE_OF_STATEMENTS] + -- end [[PARENT_UNIT_NAME .] IDENTIFIER]; + + -- N_Package_Body + -- Sloc points to PACKAGE + -- Defining_Unit_Name (Node1) + -- Declarations (List2) + -- Handled_Statement_Sequence (Node4) (set to Empty if no HSS present) + -- Corresponding_Spec (Node5-Sem) + -- Was_Originally_Stub (Flag13-Sem) + + -- Note: if a source level package does not contain a handled sequence + -- of statements, then the parser supplies a dummy one with a null + -- sequence of statements. Comes_From_Source will be False in this + -- constructed sequence. The reason we need this is for the End_Label + -- field in the HSS. + + ----------------------------------- + -- 7.4 Private Type Declaration -- + ----------------------------------- + + -- PRIVATE_TYPE_DECLARATION ::= + -- type DEFINING_IDENTIFIER [DISCRIMINANT_PART] + -- is [[abstract] tagged] [limited] private; + + -- Note: TAGGED is not permitted in Ada 83 mode + + -- N_Private_Type_Declaration + -- Sloc points to TYPE + -- Defining_Identifier (Node1) + -- Discriminant_Specifications (List4) (set to No_List if no + -- discriminant part) + -- Unknown_Discriminants_Present (Flag13) set if (<>) discriminant + -- Abstract_Present (Flag4) + -- Tagged_Present (Flag15) + -- Limited_Present (Flag17) + + ---------------------------------------- + -- 7.4 Private Extension Declaration -- + ---------------------------------------- + + -- PRIVATE_EXTENSION_DECLARATION ::= + -- type DEFINING_IDENTIFIER [DISCRIMINANT_PART] is + -- [abstract] [limited | synchronized] + -- new ancestor_SUBTYPE_INDICATION [and INTERFACE_LIST] + -- with private; + + -- Note: LIMITED, and private extension declarations are not allowed + -- in Ada 83 mode. + + -- N_Private_Extension_Declaration + -- Sloc points to TYPE + -- Defining_Identifier (Node1) + -- Discriminant_Specifications (List4) (set to No_List if no + -- discriminant part) + -- Unknown_Discriminants_Present (Flag13) set if (<>) discriminant + -- Abstract_Present (Flag4) + -- Limited_Present (Flag17) + -- Synchronized_Present (Flag7) + -- Subtype_Indication (Node5) + -- Interface_List (List2) (set to No_List if none) + + --------------------- + -- 8.4 Use Clause -- + --------------------- + + -- USE_CLAUSE ::= USE_PACKAGE_CLAUSE | USE_TYPE_CLAUSE + + ----------------------------- + -- 8.4 Use Package Clause -- + ----------------------------- + + -- USE_PACKAGE_CLAUSE ::= use package_NAME {, package_NAME}; + + -- N_Use_Package_Clause + -- Sloc points to USE + -- Names (List2) + -- Next_Use_Clause (Node3-Sem) + -- Hidden_By_Use_Clause (Elist4-Sem) + + -------------------------- + -- 8.4 Use Type Clause -- + -------------------------- + + -- USE_TYPE_CLAUSE ::= use type SUBTYPE_MARK {, SUBTYPE_MARK}; + + -- Note: use type clause is not permitted in Ada 83 mode + + -- N_Use_Type_Clause + -- Sloc points to USE + -- Subtype_Marks (List2) + -- Next_Use_Clause (Node3-Sem) + -- Hidden_By_Use_Clause (Elist4-Sem) + + ------------------------------- + -- 8.5 Renaming Declaration -- + ------------------------------- + + -- RENAMING_DECLARATION ::= + -- OBJECT_RENAMING_DECLARATION + -- | EXCEPTION_RENAMING_DECLARATION + -- | PACKAGE_RENAMING_DECLARATION + -- | SUBPROGRAM_RENAMING_DECLARATION + -- | GENERIC_RENAMING_DECLARATION + + -------------------------------------- + -- 8.5 Object Renaming Declaration -- + -------------------------------------- + + -- OBJECT_RENAMING_DECLARATION ::= + -- DEFINING_IDENTIFIER : + -- [NULL_EXCLUSION] SUBTYPE_MARK renames object_NAME; + -- | DEFINING_IDENTIFIER : + -- ACCESS_DEFINITION renames object_NAME; + + -- Note: Access_Definition is an optional field that gives support to + -- Ada 2005 (AI-230). The parser generates nodes that have either the + -- Subtype_Indication field or else the Access_Definition field. + + -- N_Object_Renaming_Declaration + -- Sloc points to first identifier + -- Defining_Identifier (Node1) + -- Null_Exclusion_Present (Flag11) (set to False if not present) + -- Subtype_Mark (Node4) (set to Empty if not present) + -- Access_Definition (Node3) (set to Empty if not present) + -- Name (Node2) + -- Corresponding_Generic_Association (Node5-Sem) + + ----------------------------------------- + -- 8.5 Exception Renaming Declaration -- + ----------------------------------------- + + -- EXCEPTION_RENAMING_DECLARATION ::= + -- DEFINING_IDENTIFIER : exception renames exception_NAME; + + -- N_Exception_Renaming_Declaration + -- Sloc points to first identifier + -- Defining_Identifier (Node1) + -- Name (Node2) + + --------------------------------------- + -- 8.5 Package Renaming Declaration -- + --------------------------------------- + + -- PACKAGE_RENAMING_DECLARATION ::= + -- package DEFINING_PROGRAM_UNIT_NAME renames package_NAME; + + -- N_Package_Renaming_Declaration + -- Sloc points to PACKAGE + -- Defining_Unit_Name (Node1) + -- Name (Node2) + -- Parent_Spec (Node4-Sem) + + ------------------------------------------ + -- 8.5 Subprogram Renaming Declaration -- + ------------------------------------------ + + -- SUBPROGRAM_RENAMING_DECLARATION ::= + -- SUBPROGRAM_SPECIFICATION renames callable_entity_NAME; + + -- N_Subprogram_Renaming_Declaration + -- Sloc points to RENAMES + -- Specification (Node1) + -- Name (Node2) + -- Parent_Spec (Node4-Sem) + -- Corresponding_Spec (Node5-Sem) + -- Corresponding_Formal_Spec (Node3-Sem) + -- From_Default (Flag6-Sem) + + ----------------------------------------- + -- 8.5.5 Generic Renaming Declaration -- + ----------------------------------------- + + -- GENERIC_RENAMING_DECLARATION ::= + -- generic package DEFINING_PROGRAM_UNIT_NAME + -- renames generic_package_NAME + -- | generic procedure DEFINING_PROGRAM_UNIT_NAME + -- renames generic_procedure_NAME + -- | generic function DEFINING_PROGRAM_UNIT_NAME + -- renames generic_function_NAME + + -- N_Generic_Package_Renaming_Declaration + -- Sloc points to GENERIC + -- Defining_Unit_Name (Node1) + -- Name (Node2) + -- Parent_Spec (Node4-Sem) + + -- N_Generic_Procedure_Renaming_Declaration + -- Sloc points to GENERIC + -- Defining_Unit_Name (Node1) + -- Name (Node2) + -- Parent_Spec (Node4-Sem) + + -- N_Generic_Function_Renaming_Declaration + -- Sloc points to GENERIC + -- Defining_Unit_Name (Node1) + -- Name (Node2) + -- Parent_Spec (Node4-Sem) + + -------------------------------- + -- 9.1 Task Type Declaration -- + -------------------------------- + + -- TASK_TYPE_DECLARATION ::= + -- task type DEFINING_IDENTIFIER [KNOWN_DISCRIMINANT_PART] + -- [is [new INTERFACE_LIST with] TASK_DEFINITION]; + + -- N_Task_Type_Declaration + -- Sloc points to TASK + -- Defining_Identifier (Node1) + -- Discriminant_Specifications (List4) (set to No_List if no + -- discriminant part) + -- Interface_List (List2) (set to No_List if none) + -- Task_Definition (Node3) (set to Empty if not present) + -- Corresponding_Body (Node5-Sem) + + ---------------------------------- + -- 9.1 Single Task Declaration -- + ---------------------------------- + + -- SINGLE_TASK_DECLARATION ::= + -- task DEFINING_IDENTIFIER + -- [is [new INTERFACE_LIST with] TASK_DEFINITION]; + + -- N_Single_Task_Declaration + -- Sloc points to TASK + -- Defining_Identifier (Node1) + -- Interface_List (List2) (set to No_List if none) + -- Task_Definition (Node3) (set to Empty if not present) + + -------------------------- + -- 9.1 Task Definition -- + -------------------------- + + -- TASK_DEFINITION ::= + -- {TASK_ITEM} + -- [private + -- {TASK_ITEM}] + -- end [task_IDENTIFIER] + + -- Note: as a result of semantic analysis, the list of task items can + -- include implicit type declarations resulting from entry families. + + -- N_Task_Definition + -- Sloc points to first token of task definition + -- Visible_Declarations (List2) + -- Private_Declarations (List3) (set to No_List if no private part) + -- End_Label (Node4) + -- Has_Priority_Pragma (Flag6-Sem) + -- Has_Storage_Size_Pragma (Flag5-Sem) + -- Has_Task_Info_Pragma (Flag7-Sem) + -- Has_Task_Name_Pragma (Flag8-Sem) + -- Has_Relative_Deadline_Pragma (Flag9-Sem) + + -------------------- + -- 9.1 Task Item -- + -------------------- + + -- TASK_ITEM ::= ENTRY_DECLARATION | REPRESENTATION_CLAUSE + + -------------------- + -- 9.1 Task Body -- + -------------------- + + -- TASK_BODY ::= + -- task body task_DEFINING_IDENTIFIER is + -- DECLARATIVE_PART + -- begin + -- HANDLED_SEQUENCE_OF_STATEMENTS + -- end [task_IDENTIFIER]; + + -- Gigi restriction: This node never appears + + -- N_Task_Body + -- Sloc points to TASK + -- Defining_Identifier (Node1) + -- Declarations (List2) + -- Handled_Statement_Sequence (Node4) + -- Is_Task_Master (Flag5-Sem) + -- Activation_Chain_Entity (Node3-Sem) + -- Corresponding_Spec (Node5-Sem) + -- Was_Originally_Stub (Flag13-Sem) + + ------------------------------------- + -- 9.4 Protected Type Declaration -- + ------------------------------------- + + -- PROTECTED_TYPE_DECLARATION ::= + -- protected type DEFINING_IDENTIFIER [KNOWN_DISCRIMINANT_PART] + -- is [new INTERFACE_LIST with] PROTECTED_DEFINITION; + + -- Note: protected type declarations are not permitted in Ada 83 mode + + -- N_Protected_Type_Declaration + -- Sloc points to PROTECTED + -- Defining_Identifier (Node1) + -- Discriminant_Specifications (List4) (set to No_List if no + -- discriminant part) + -- Interface_List (List2) (set to No_List if none) + -- Protected_Definition (Node3) + -- Corresponding_Body (Node5-Sem) + + --------------------------------------- + -- 9.4 Single Protected Declaration -- + --------------------------------------- + + -- SINGLE_PROTECTED_DECLARATION ::= + -- protected DEFINING_IDENTIFIER + -- is [new INTERFACE_LIST with] PROTECTED_DEFINITION; + + -- Note: single protected declarations are not allowed in Ada 83 mode + + -- N_Single_Protected_Declaration + -- Sloc points to PROTECTED + -- Defining_Identifier (Node1) + -- Interface_List (List2) (set to No_List if none) + -- Protected_Definition (Node3) + + ------------------------------- + -- 9.4 Protected Definition -- + ------------------------------- + + -- PROTECTED_DEFINITION ::= + -- {PROTECTED_OPERATION_DECLARATION} + -- [private + -- {PROTECTED_ELEMENT_DECLARATION}] + -- end [protected_IDENTIFIER] + + -- N_Protected_Definition + -- Sloc points to first token of protected definition + -- Visible_Declarations (List2) + -- Private_Declarations (List3) (set to No_List if no private part) + -- End_Label (Node4) + -- Has_Priority_Pragma (Flag6-Sem) + + ------------------------------------------ + -- 9.4 Protected Operation Declaration -- + ------------------------------------------ + + -- PROTECTED_OPERATION_DECLARATION ::= + -- SUBPROGRAM_DECLARATION + -- | ENTRY_DECLARATION + -- | REPRESENTATION_CLAUSE + + ---------------------------------------- + -- 9.4 Protected Element Declaration -- + ---------------------------------------- + + -- PROTECTED_ELEMENT_DECLARATION ::= + -- PROTECTED_OPERATION_DECLARATION | COMPONENT_DECLARATION + + ------------------------- + -- 9.4 Protected Body -- + ------------------------- + + -- PROTECTED_BODY ::= + -- protected body DEFINING_IDENTIFIER is + -- {PROTECTED_OPERATION_ITEM} + -- end [protected_IDENTIFIER]; + + -- Note: protected bodies are not allowed in Ada 83 mode + + -- Gigi restriction: This node never appears + + -- N_Protected_Body + -- Sloc points to PROTECTED + -- Defining_Identifier (Node1) + -- Declarations (List2) protected operation items (and pragmas) + -- End_Label (Node4) + -- Corresponding_Spec (Node5-Sem) + -- Was_Originally_Stub (Flag13-Sem) + + ----------------------------------- + -- 9.4 Protected Operation Item -- + ----------------------------------- + + -- PROTECTED_OPERATION_ITEM ::= + -- SUBPROGRAM_DECLARATION + -- | SUBPROGRAM_BODY + -- | ENTRY_BODY + -- | REPRESENTATION_CLAUSE + + ------------------------------ + -- 9.5.2 Entry Declaration -- + ------------------------------ + + -- ENTRY_DECLARATION ::= + -- [[not] overriding] + -- entry DEFINING_IDENTIFIER + -- [(DISCRETE_SUBTYPE_DEFINITION)] PARAMETER_PROFILE; + + -- N_Entry_Declaration + -- Sloc points to ENTRY + -- Defining_Identifier (Node1) + -- Discrete_Subtype_Definition (Node4) (set to Empty if not present) + -- Parameter_Specifications (List3) (set to No_List if no formal part) + -- Corresponding_Body (Node5-Sem) + -- Must_Override (Flag14) set if overriding indicator present + -- Must_Not_Override (Flag15) set if not_overriding indicator present + + -- Note: overriding indicator is an Ada 2005 feature + + ----------------------------- + -- 9.5.2 Accept statement -- + ----------------------------- + + -- ACCEPT_STATEMENT ::= + -- accept entry_DIRECT_NAME + -- [(ENTRY_INDEX)] PARAMETER_PROFILE [do + -- HANDLED_SEQUENCE_OF_STATEMENTS + -- end [entry_IDENTIFIER]]; + + -- Gigi restriction: This node never appears + + -- Note: there are no explicit declarations allowed in an accept + -- statement. However, the implicit declarations for any statement + -- identifiers (labels and block/loop identifiers) are declarations + -- that belong logically to the accept statement, and that is why + -- there is a Declarations field in this node. + + -- N_Accept_Statement + -- Sloc points to ACCEPT + -- Entry_Direct_Name (Node1) + -- Entry_Index (Node5) (set to Empty if not present) + -- Parameter_Specifications (List3) (set to No_List if no formal part) + -- Handled_Statement_Sequence (Node4) + -- Declarations (List2) (set to No_List if no declarations) + + ------------------------ + -- 9.5.2 Entry Index -- + ------------------------ + + -- ENTRY_INDEX ::= EXPRESSION + + ----------------------- + -- 9.5.2 Entry Body -- + ----------------------- + + -- ENTRY_BODY ::= + -- entry DEFINING_IDENTIFIER ENTRY_BODY_FORMAL_PART ENTRY_BARRIER is + -- DECLARATIVE_PART + -- begin + -- HANDLED_SEQUENCE_OF_STATEMENTS + -- end [entry_IDENTIFIER]; + + -- ENTRY_BARRIER ::= when CONDITION + + -- Note: we store the CONDITION of the ENTRY_BARRIER in the node for + -- the ENTRY_BODY_FORMAL_PART to avoid the N_Entry_Body node getting + -- too full (it would otherwise have too many fields) + + -- Gigi restriction: This node never appears + + -- N_Entry_Body + -- Sloc points to ENTRY + -- Defining_Identifier (Node1) + -- Entry_Body_Formal_Part (Node5) + -- Declarations (List2) + -- Handled_Statement_Sequence (Node4) + -- Activation_Chain_Entity (Node3-Sem) + + ----------------------------------- + -- 9.5.2 Entry Body Formal Part -- + ----------------------------------- + + -- ENTRY_BODY_FORMAL_PART ::= + -- [(ENTRY_INDEX_SPECIFICATION)] PARAMETER_PROFILE + + -- Note that an entry body formal part node is present even if it is + -- empty. This reflects the grammar, in which it is the components of + -- the entry body formal part that are optional, not the entry body + -- formal part itself. Also this means that the barrier condition + -- always has somewhere to be stored. + + -- Gigi restriction: This node never appears + + -- N_Entry_Body_Formal_Part + -- Sloc points to first token + -- Entry_Index_Specification (Node4) (set to Empty if not present) + -- Parameter_Specifications (List3) (set to No_List if no formal part) + -- Condition (Node1) from entry barrier of entry body + + -------------------------- + -- 9.5.2 Entry Barrier -- + -------------------------- + + -- ENTRY_BARRIER ::= when CONDITION + + -------------------------------------- + -- 9.5.2 Entry Index Specification -- + -------------------------------------- + + -- ENTRY_INDEX_SPECIFICATION ::= + -- for DEFINING_IDENTIFIER in DISCRETE_SUBTYPE_DEFINITION + + -- Gigi restriction: This node never appears + + -- N_Entry_Index_Specification + -- Sloc points to FOR + -- Defining_Identifier (Node1) + -- Discrete_Subtype_Definition (Node4) + + --------------------------------- + -- 9.5.3 Entry Call Statement -- + --------------------------------- + + -- ENTRY_CALL_STATEMENT ::= entry_NAME [ACTUAL_PARAMETER_PART]; + + -- The parser may generate a procedure call for this construct. The + -- semantic pass must correct this misidentification where needed. + + -- Gigi restriction: This node never appears + + -- N_Entry_Call_Statement + -- Sloc points to first token of name + -- Name (Node2) + -- Parameter_Associations (List3) (set to No_List if no + -- actual parameter part) + -- First_Named_Actual (Node4-Sem) + + ------------------------------ + -- 9.5.4 Requeue Statement -- + ------------------------------ + + -- REQUEUE_STATEMENT ::= requeue entry_NAME [with abort]; + + -- Note: requeue statements are not permitted in Ada 83 mode + + -- Gigi restriction: This node never appears + + -- N_Requeue_Statement + -- Sloc points to REQUEUE + -- Name (Node2) + -- Abort_Present (Flag15) + + -------------------------- + -- 9.6 Delay Statement -- + -------------------------- + + -- DELAY_STATEMENT ::= + -- DELAY_UNTIL_STATEMENT + -- | DELAY_RELATIVE_STATEMENT + + -------------------------------- + -- 9.6 Delay Until Statement -- + -------------------------------- + + -- DELAY_UNTIL_STATEMENT ::= delay until delay_EXPRESSION; + + -- Note: delay until statements are not permitted in Ada 83 mode + + -- Gigi restriction: This node never appears + + -- N_Delay_Until_Statement + -- Sloc points to DELAY + -- Expression (Node3) + + ----------------------------------- + -- 9.6 Delay Relative Statement -- + ----------------------------------- + + -- DELAY_RELATIVE_STATEMENT ::= delay delay_EXPRESSION; + + -- Gigi restriction: This node never appears + + -- N_Delay_Relative_Statement + -- Sloc points to DELAY + -- Expression (Node3) + + --------------------------- + -- 9.7 Select Statement -- + --------------------------- + + -- SELECT_STATEMENT ::= + -- SELECTIVE_ACCEPT + -- | TIMED_ENTRY_CALL + -- | CONDITIONAL_ENTRY_CALL + -- | ASYNCHRONOUS_SELECT + + ----------------------------- + -- 9.7.1 Selective Accept -- + ----------------------------- + + -- SELECTIVE_ACCEPT ::= + -- select + -- [GUARD] + -- SELECT_ALTERNATIVE + -- {or + -- [GUARD] + -- SELECT_ALTERNATIVE} + -- [else + -- SEQUENCE_OF_STATEMENTS] + -- end select; + + -- Gigi restriction: This node never appears + + -- Note: the guard expression, if present, appears in the node for + -- the select alternative. + + -- N_Selective_Accept + -- Sloc points to SELECT + -- Select_Alternatives (List1) + -- Else_Statements (List4) (set to No_List if no else part) + + ------------------ + -- 9.7.1 Guard -- + ------------------ + + -- GUARD ::= when CONDITION => + + -- As noted above, the CONDITION that is part of a GUARD is included + -- in the node for the select alternative for convenience. + + ------------------------------- + -- 9.7.1 Select Alternative -- + ------------------------------- + + -- SELECT_ALTERNATIVE ::= + -- ACCEPT_ALTERNATIVE + -- | DELAY_ALTERNATIVE + -- | TERMINATE_ALTERNATIVE + + ------------------------------- + -- 9.7.1 Accept Alternative -- + ------------------------------- + + -- ACCEPT_ALTERNATIVE ::= + -- ACCEPT_STATEMENT [SEQUENCE_OF_STATEMENTS] + + -- Gigi restriction: This node never appears + + -- N_Accept_Alternative + -- Sloc points to ACCEPT + -- Accept_Statement (Node2) + -- Condition (Node1) from the guard (set to Empty if no guard present) + -- Statements (List3) (set to Empty_List if no statements) + -- Pragmas_Before (List4) pragmas before alt (set to No_List if none) + -- Accept_Handler_Records (List5-Sem) + + ------------------------------ + -- 9.7.1 Delay Alternative -- + ------------------------------ + + -- DELAY_ALTERNATIVE ::= + -- DELAY_STATEMENT [SEQUENCE_OF_STATEMENTS] + + -- Gigi restriction: This node never appears + + -- N_Delay_Alternative + -- Sloc points to DELAY + -- Delay_Statement (Node2) + -- Condition (Node1) from the guard (set to Empty if no guard present) + -- Statements (List3) (set to Empty_List if no statements) + -- Pragmas_Before (List4) pragmas before alt (set to No_List if none) + + ---------------------------------- + -- 9.7.1 Terminate Alternative -- + ---------------------------------- + + -- TERMINATE_ALTERNATIVE ::= terminate; + + -- Gigi restriction: This node never appears + + -- N_Terminate_Alternative + -- Sloc points to TERMINATE + -- Condition (Node1) from the guard (set to Empty if no guard present) + -- Pragmas_Before (List4) pragmas before alt (set to No_List if none) + -- Pragmas_After (List5) pragmas after alt (set to No_List if none) + + ----------------------------- + -- 9.7.2 Timed Entry Call -- + ----------------------------- + + -- TIMED_ENTRY_CALL ::= + -- select + -- ENTRY_CALL_ALTERNATIVE + -- or + -- DELAY_ALTERNATIVE + -- end select; + + -- Gigi restriction: This node never appears + + -- N_Timed_Entry_Call + -- Sloc points to SELECT + -- Entry_Call_Alternative (Node1) + -- Delay_Alternative (Node4) + + ----------------------------------- + -- 9.7.2 Entry Call Alternative -- + ----------------------------------- + + -- ENTRY_CALL_ALTERNATIVE ::= + -- PROCEDURE_OR_ENTRY_CALL [SEQUENCE_OF_STATEMENTS] + + -- PROCEDURE_OR_ENTRY_CALL ::= + -- PROCEDURE_CALL_STATEMENT | ENTRY_CALL_STATEMENT + + -- Gigi restriction: This node never appears + + -- N_Entry_Call_Alternative + -- Sloc points to first token of entry call statement + -- Entry_Call_Statement (Node1) + -- Statements (List3) (set to Empty_List if no statements) + -- Pragmas_Before (List4) pragmas before alt (set to No_List if none) + + ----------------------------------- + -- 9.7.3 Conditional Entry Call -- + ----------------------------------- + + -- CONDITIONAL_ENTRY_CALL ::= + -- select + -- ENTRY_CALL_ALTERNATIVE + -- else + -- SEQUENCE_OF_STATEMENTS + -- end select; + + -- Gigi restriction: This node never appears + + -- N_Conditional_Entry_Call + -- Sloc points to SELECT + -- Entry_Call_Alternative (Node1) + -- Else_Statements (List4) + + -------------------------------- + -- 9.7.4 Asynchronous Select -- + -------------------------------- + + -- ASYNCHRONOUS_SELECT ::= + -- select + -- TRIGGERING_ALTERNATIVE + -- then abort + -- ABORTABLE_PART + -- end select; + + -- Note: asynchronous select is not permitted in Ada 83 mode + + -- Gigi restriction: This node never appears + + -- N_Asynchronous_Select + -- Sloc points to SELECT + -- Triggering_Alternative (Node1) + -- Abortable_Part (Node2) + + ----------------------------------- + -- 9.7.4 Triggering Alternative -- + ----------------------------------- + + -- TRIGGERING_ALTERNATIVE ::= + -- TRIGGERING_STATEMENT [SEQUENCE_OF_STATEMENTS] + + -- Gigi restriction: This node never appears + + -- N_Triggering_Alternative + -- Sloc points to first token of triggering statement + -- Triggering_Statement (Node1) + -- Statements (List3) (set to Empty_List if no statements) + -- Pragmas_Before (List4) pragmas before alt (set to No_List if none) + + --------------------------------- + -- 9.7.4 Triggering Statement -- + --------------------------------- + + -- TRIGGERING_STATEMENT ::= PROCEDURE_OR_ENTRY_CALL | DELAY_STATEMENT + + --------------------------- + -- 9.7.4 Abortable Part -- + --------------------------- + + -- ABORTABLE_PART ::= SEQUENCE_OF_STATEMENTS + + -- Gigi restriction: This node never appears + + -- N_Abortable_Part + -- Sloc points to ABORT + -- Statements (List3) + + -------------------------- + -- 9.8 Abort Statement -- + -------------------------- + + -- ABORT_STATEMENT ::= abort task_NAME {, task_NAME}; + + -- Gigi restriction: This node never appears + + -- N_Abort_Statement + -- Sloc points to ABORT + -- Names (List2) + + ------------------------- + -- 10.1.1 Compilation -- + ------------------------- + + -- COMPILATION ::= {COMPILATION_UNIT} + + -- There is no explicit node in the tree for a compilation, since in + -- general the compiler is processing only a single compilation unit + -- at a time. It is possible to parse multiple units in syntax check + -- only mode, but they the trees are discarded in any case. + + ------------------------------ + -- 10.1.1 Compilation Unit -- + ------------------------------ + + -- COMPILATION_UNIT ::= + -- CONTEXT_CLAUSE LIBRARY_ITEM + -- | CONTEXT_CLAUSE SUBUNIT + + -- The N_Compilation_Unit node itself represents the above syntax. + -- However, there are two additional items not reflected in the above + -- syntax. First we have the global declarations that are added by the + -- code generator. These are outer level declarations (so they cannot + -- be represented as being inside the units). An example is the wrapper + -- subprograms that are created to do ABE checking. As always a list of + -- declarations can contain actions as well (i.e. statements), and such + -- statements are executed as part of the elaboration of the unit. Note + -- that all such declarations are elaborated before the library unit. + + -- Similarly, certain actions need to be elaborated at the completion + -- of elaboration of the library unit (notably the statement that sets + -- the Boolean flag indicating that elaboration is complete). + + -- The third item not reflected in the syntax is pragmas that appear + -- after the compilation unit. As always pragmas are a problem since + -- they are not part of the formal syntax, but can be stuck into the + -- source following a set of ad hoc rules, and we have to find an ad + -- hoc way of sticking them into the tree. For pragmas that appear + -- before the library unit, we just consider them to be part of the + -- context clause, and pragmas can appear in the Context_Items list + -- of the compilation unit. However, pragmas can also appear after + -- the library item. + + -- To deal with all these problems, we create an auxiliary node for + -- a compilation unit, referenced from the N_Compilation_Unit node + -- that contains these three items. + + -- N_Compilation_Unit + -- Sloc points to first token of defining unit name + -- Library_Unit (Node4-Sem) corresponding/parent spec/body + -- Context_Items (List1) context items and pragmas preceding unit + -- Private_Present (Flag15) set if library unit has private keyword + -- Unit (Node2) library item or subunit + -- Aux_Decls_Node (Node5) points to the N_Compilation_Unit_Aux node + -- Has_No_Elaboration_Code (Flag17-Sem) + -- Body_Required (Flag13-Sem) set for spec if body is required + -- Acts_As_Spec (Flag4-Sem) flag for subprogram body with no spec + -- First_Inlined_Subprogram (Node3-Sem) + + -- N_Compilation_Unit_Aux + -- Sloc is a copy of the Sloc from the N_Compilation_Unit node + -- Declarations (List2) (set to No_List if no global declarations) + -- Actions (List1) (set to No_List if no actions) + -- Pragmas_After (List5) pragmas after unit (set to No_List if none) + -- Config_Pragmas (List4) config pragmas (set to Empty_List if none) + + -------------------------- + -- 10.1.1 Library Item -- + -------------------------- + + -- LIBRARY_ITEM ::= + -- [private] LIBRARY_UNIT_DECLARATION + -- | LIBRARY_UNIT_BODY + -- | [private] LIBRARY_UNIT_RENAMING_DECLARATION + + -- Note: PRIVATE is not allowed in Ada 83 mode + + -- There is no explicit node in the tree for library item, instead + -- the declaration or body, and the flag for private if present, + -- appear in the N_Compilation_Unit clause. + + -------------------------------------- + -- 10.1.1 Library Unit Declaration -- + -------------------------------------- + + -- LIBRARY_UNIT_DECLARATION ::= + -- SUBPROGRAM_DECLARATION | PACKAGE_DECLARATION + -- | GENERIC_DECLARATION | GENERIC_INSTANTIATION + + ----------------------------------------------- + -- 10.1.1 Library Unit Renaming Declaration -- + ----------------------------------------------- + + -- LIBRARY_UNIT_RENAMING_DECLARATION ::= + -- PACKAGE_RENAMING_DECLARATION + -- | GENERIC_RENAMING_DECLARATION + -- | SUBPROGRAM_RENAMING_DECLARATION + + ------------------------------- + -- 10.1.1 Library unit body -- + ------------------------------- + + -- LIBRARY_UNIT_BODY ::= SUBPROGRAM_BODY | PACKAGE_BODY + + ------------------------------ + -- 10.1.1 Parent Unit Name -- + ------------------------------ + + -- PARENT_UNIT_NAME ::= NAME + + ---------------------------- + -- 10.1.2 Context clause -- + ---------------------------- + + -- CONTEXT_CLAUSE ::= {CONTEXT_ITEM} + + -- The context clause can include pragmas, and any pragmas that appear + -- before the context clause proper (i.e. all configuration pragmas, + -- also appear at the front of this list). + + -------------------------- + -- 10.1.2 Context_Item -- + -------------------------- + + -- CONTEXT_ITEM ::= WITH_CLAUSE | USE_CLAUSE | WITH_TYPE_CLAUSE + + ------------------------- + -- 10.1.2 With clause -- + ------------------------- + + -- WITH_CLAUSE ::= + -- with library_unit_NAME {,library_unit_NAME}; + + -- A separate With clause is built for each name, so that we have + -- a Corresponding_Spec field for each with'ed spec. The flags + -- First_Name and Last_Name are used to reconstruct the exact + -- source form. When a list of names appears in one with clause, + -- the first name in the list has First_Name set, and the last + -- has Last_Name set. If the with clause has only one name, then + -- both of the flags First_Name and Last_Name are set in this name. + + -- Note: in the case of implicit with's that are installed by the + -- Rtsfind routine, Implicit_With is set, and the Sloc is typically + -- set to Standard_Location, but it is incorrect to test the Sloc + -- to find out if a with clause is implicit, test the flag instead. + + -- N_With_Clause + -- Sloc points to first token of library unit name + -- Name (Node2) + -- Library_Unit (Node4-Sem) + -- Corresponding_Spec (Node5-Sem) + -- First_Name (Flag5) (set to True if first name or only one name) + -- Last_Name (Flag6) (set to True if last name or only one name) + -- Context_Installed (Flag13-Sem) + -- Elaborate_Present (Flag4-Sem) + -- Elaborate_All_Present (Flag14-Sem) + -- Elaborate_All_Desirable (Flag9-Sem) + -- Elaborate_Desirable (Flag11-Sem) + -- Private_Present (Flag15) set if with_clause has private keyword + -- Implicit_With (Flag16-Sem) + -- Limited_Present (Flag17) set if LIMITED is present + -- Limited_View_Installed (Flag18-Sem) + -- Unreferenced_In_Spec (Flag7-Sem) + -- No_Entities_Ref_In_Spec (Flag8-Sem) + + -- Note: Limited_Present and Limited_View_Installed give support to + -- Ada 2005 (AI-50217). + -- Similarly, Private_Present gives support to AI-50262. + + ---------------------- + -- With_Type clause -- + ---------------------- + + -- This is a GNAT extension, used to implement mutually recursive + -- types declared in different packages. + -- Note: this is now obsolete. The functionality of this construct + -- is now implemented by the Ada 2005 Limited_with_Clause. + + --------------------- + -- 10.2 Body stub -- + --------------------- + + -- BODY_STUB ::= + -- SUBPROGRAM_BODY_STUB + -- | PACKAGE_BODY_STUB + -- | TASK_BODY_STUB + -- | PROTECTED_BODY_STUB + + ---------------------------------- + -- 10.1.3 Subprogram Body Stub -- + ---------------------------------- + + -- SUBPROGRAM_BODY_STUB ::= + -- SUBPROGRAM_SPECIFICATION is separate; + + -- N_Subprogram_Body_Stub + -- Sloc points to FUNCTION or PROCEDURE + -- Specification (Node1) + -- Library_Unit (Node4-Sem) points to the subunit + -- Corresponding_Body (Node5-Sem) + + ------------------------------- + -- 10.1.3 Package Body Stub -- + ------------------------------- + + -- PACKAGE_BODY_STUB ::= + -- package body DEFINING_IDENTIFIER is separate; + + -- N_Package_Body_Stub + -- Sloc points to PACKAGE + -- Defining_Identifier (Node1) + -- Library_Unit (Node4-Sem) points to the subunit + -- Corresponding_Body (Node5-Sem) + + ---------------------------- + -- 10.1.3 Task Body Stub -- + ---------------------------- + + -- TASK_BODY_STUB ::= + -- task body DEFINING_IDENTIFIER is separate; + + -- N_Task_Body_Stub + -- Sloc points to TASK + -- Defining_Identifier (Node1) + -- Library_Unit (Node4-Sem) points to the subunit + -- Corresponding_Body (Node5-Sem) + + --------------------------------- + -- 10.1.3 Protected Body Stub -- + --------------------------------- + + -- PROTECTED_BODY_STUB ::= + -- protected body DEFINING_IDENTIFIER is separate; + + -- Note: protected body stubs are not allowed in Ada 83 mode + + -- N_Protected_Body_Stub + -- Sloc points to PROTECTED + -- Defining_Identifier (Node1) + -- Library_Unit (Node4-Sem) points to the subunit + -- Corresponding_Body (Node5-Sem) + + --------------------- + -- 10.1.3 Subunit -- + --------------------- + + -- SUBUNIT ::= separate (PARENT_UNIT_NAME) PROPER_BODY + + -- N_Subunit + -- Sloc points to SEPARATE + -- Name (Node2) is the name of the parent unit + -- Proper_Body (Node1) is the subunit body + -- Corresponding_Stub (Node3-Sem) is the stub declaration for the unit. + + --------------------------------- + -- 11.1 Exception Declaration -- + --------------------------------- + + -- EXCEPTION_DECLARATION ::= DEFINING_IDENTIFIER_LIST : exception; + + -- For consistency with object declarations etc., the parser converts + -- the case of multiple identifiers being declared to a series of + -- declarations in which the expression is copied, using the More_Ids + -- and Prev_Ids flags to remember the source form as described in the + -- section on "Handling of Defining Identifier Lists". + + -- N_Exception_Declaration + -- Sloc points to EXCEPTION + -- Defining_Identifier (Node1) + -- Expression (Node3-Sem) + -- Renaming_Exception (Node2-Sem) + -- More_Ids (Flag5) (set to False if no more identifiers in list) + -- Prev_Ids (Flag6) (set to False if no previous identifiers in list) + + ------------------------------------------ + -- 11.2 Handled Sequence Of Statements -- + ------------------------------------------ + + -- HANDLED_SEQUENCE_OF_STATEMENTS ::= + -- SEQUENCE_OF_STATEMENTS + -- [exception + -- EXCEPTION_HANDLER + -- {EXCEPTION_HANDLER}] + -- [at end + -- cleanup_procedure_call (param, param, param, ...);] + + -- The AT END phrase is a GNAT extension to provide for cleanups. It is + -- used only internally currently, but is considered to be syntactic. + -- At the moment, the only cleanup action allowed is a single call to + -- a parameterless procedure, and the Identifier field of the node is + -- the procedure to be called. Also there is a current restriction + -- that exception handles and a cleanup cannot be present in the same + -- frame, so at least one of Exception_Handlers or the Identifier must + -- be missing. + + -- Actually, more accurately, this restriction applies to the original + -- source program. In the expanded tree, if the At_End_Proc field is + -- present, then there will also be an exception handler of the form: + + -- when all others => + -- cleanup; + -- raise; + + -- where cleanup is the procedure to be generated. The reason we do + -- this is so that the front end can handle the necessary entries in + -- the exception tables, and other exception handler actions required + -- as part of the normal handling for exception handlers. + + -- The AT END cleanup handler protects only the sequence of statements + -- (not the associated declarations of the parent), just like exception + -- handlers. The big difference is that the cleanup procedure is called + -- on either a normal or an abnormal exit from the statement sequence. + + -- Note: the list of Exception_Handlers can contain pragmas as well + -- as actual handlers. In practice these pragmas can only occur at + -- the start of the list, since any pragmas occurring later on will + -- be included in the statement list of the corresponding handler. + + -- Note: although in the Ada syntax, the sequence of statements in + -- a handled sequence of statements can only contain statements, we + -- allow free mixing of declarations and statements in the resulting + -- expanded tree. This is for example used to deal with the case of + -- a cleanup procedure that must handle declarations as well as the + -- statements of a block. + + -- N_Handled_Sequence_Of_Statements + -- Sloc points to first token of first statement + -- Statements (List3) + -- End_Label (Node4) (set to Empty if expander generated) + -- Exception_Handlers (List5) (set to No_List if none present) + -- At_End_Proc (Node1) (set to Empty if no clean up procedure) + -- First_Real_Statement (Node2-Sem) + -- Zero_Cost_Handling (Flag5-Sem) + + -- Note: the parent always contains a Declarations field which contains + -- declarations associated with the handled sequence of statements. This + -- is true even in the case of an accept statement (see description of + -- the N_Accept_Statement node). + + -- End_Label refers to the containing construct + + ----------------------------- + -- 11.2 Exception Handler -- + ----------------------------- + + -- EXCEPTION_HANDLER ::= + -- when [CHOICE_PARAMETER_SPECIFICATION :] + -- EXCEPTION_CHOICE {| EXCEPTION_CHOICE} => + -- SEQUENCE_OF_STATEMENTS + + -- Note: choice parameter specification is not allowed in Ada 83 mode + + -- N_Exception_Handler + -- Sloc points to WHEN + -- Choice_Parameter (Node2) (set to Empty if not present) + -- Exception_Choices (List4) + -- Statements (List3) + -- Exception_Label (Node5-Sem) (set to Empty of not present) + -- Zero_Cost_Handling (Flag5-Sem) + -- Local_Raise_Statements (Elist1-Sem) (set to No_Elist if not present) + -- Local_Raise_Not_OK (Flag7-Sem) + -- Has_Local_Raise (Flag8-Sem) + + ------------------------------------------ + -- 11.2 Choice parameter specification -- + ------------------------------------------ + + -- CHOICE_PARAMETER_SPECIFICATION ::= DEFINING_IDENTIFIER + + ---------------------------- + -- 11.2 Exception Choice -- + ---------------------------- + + -- EXCEPTION_CHOICE ::= exception_NAME | others + + -- Except in the case of OTHERS, no explicit node appears in the tree + -- for exception choice. Instead the exception name appears directly. + -- An OTHERS choice is represented by a N_Others_Choice node (see + -- section 3.8.1. + + -- Note: for the exception choice created for an at end handler, the + -- exception choice is an N_Others_Choice node with All_Others set. + + --------------------------- + -- 11.3 Raise Statement -- + --------------------------- + + -- RAISE_STATEMENT ::= raise [exception_NAME]; + + -- In Ada 2005, we have + + -- RAISE_STATEMENT ::= raise; | raise exception_NAME [with EXPRESSION]; + + -- N_Raise_Statement + -- Sloc points to RAISE + -- Name (Node2) (set to Empty if no exception name present) + -- Expression (Node3) (set to Empty if no expression present) + -- From_At_End (Flag4-Sem) + + ------------------------------- + -- 12.1 Generic Declaration -- + ------------------------------- + + -- GENERIC_DECLARATION ::= + -- GENERIC_SUBPROGRAM_DECLARATION | GENERIC_PACKAGE_DECLARATION + + ------------------------------------------ + -- 12.1 Generic Subprogram Declaration -- + ------------------------------------------ + + -- GENERIC_SUBPROGRAM_DECLARATION ::= + -- GENERIC_FORMAL_PART SUBPROGRAM_SPECIFICATION; + + -- Note: Generic_Formal_Declarations can include pragmas + + -- N_Generic_Subprogram_Declaration + -- Sloc points to GENERIC + -- Specification (Node1) subprogram specification + -- Corresponding_Body (Node5-Sem) + -- Generic_Formal_Declarations (List2) from generic formal part + -- Parent_Spec (Node4-Sem) + + --------------------------------------- + -- 12.1 Generic Package Declaration -- + --------------------------------------- + + -- GENERIC_PACKAGE_DECLARATION ::= + -- GENERIC_FORMAL_PART PACKAGE_SPECIFICATION; + + -- Note: when we do generics right, the Activation_Chain_Entity entry + -- for this node can be removed (since the expander won't see generic + -- units any more)???. + + -- Note: Generic_Formal_Declarations can include pragmas + + -- N_Generic_Package_Declaration + -- Sloc points to GENERIC + -- Specification (Node1) package specification + -- Corresponding_Body (Node5-Sem) + -- Generic_Formal_Declarations (List2) from generic formal part + -- Parent_Spec (Node4-Sem) + -- Activation_Chain_Entity (Node3-Sem) + + ------------------------------- + -- 12.1 Generic Formal Part -- + ------------------------------- + + -- GENERIC_FORMAL_PART ::= + -- generic {GENERIC_FORMAL_PARAMETER_DECLARATION | USE_CLAUSE} + + ------------------------------------------------ + -- 12.1 Generic Formal Parameter Declaration -- + ------------------------------------------------ + + -- GENERIC_FORMAL_PARAMETER_DECLARATION ::= + -- FORMAL_OBJECT_DECLARATION + -- | FORMAL_TYPE_DECLARATION + -- | FORMAL_SUBPROGRAM_DECLARATION + -- | FORMAL_PACKAGE_DECLARATION + + --------------------------------- + -- 12.3 Generic Instantiation -- + --------------------------------- + + -- GENERIC_INSTANTIATION ::= + -- package DEFINING_PROGRAM_UNIT_NAME is + -- new generic_package_NAME [GENERIC_ACTUAL_PART]; + -- | [[not] overriding] + -- procedure DEFINING_PROGRAM_UNIT_NAME is + -- new generic_procedure_NAME [GENERIC_ACTUAL_PART]; + -- | [[not] overriding] + -- function DEFINING_DESIGNATOR is + -- new generic_function_NAME [GENERIC_ACTUAL_PART]; + + -- N_Package_Instantiation + -- Sloc points to PACKAGE + -- Defining_Unit_Name (Node1) + -- Name (Node2) + -- Generic_Associations (List3) (set to No_List if no + -- generic actual part) + -- Parent_Spec (Node4-Sem) + -- Instance_Spec (Node5-Sem) + -- ABE_Is_Certain (Flag18-Sem) + + -- N_Procedure_Instantiation + -- Sloc points to PROCEDURE + -- Defining_Unit_Name (Node1) + -- Name (Node2) + -- Parent_Spec (Node4-Sem) + -- Generic_Associations (List3) (set to No_List if no + -- generic actual part) + -- Instance_Spec (Node5-Sem) + -- Must_Override (Flag14) set if overriding indicator present + -- Must_Not_Override (Flag15) set if not_overriding indicator present + -- ABE_Is_Certain (Flag18-Sem) + + -- N_Function_Instantiation + -- Sloc points to FUNCTION + -- Defining_Unit_Name (Node1) + -- Name (Node2) + -- Generic_Associations (List3) (set to No_List if no + -- generic actual part) + -- Parent_Spec (Node4-Sem) + -- Instance_Spec (Node5-Sem) + -- Must_Override (Flag14) set if overriding indicator present + -- Must_Not_Override (Flag15) set if not_overriding indicator present + -- ABE_Is_Certain (Flag18-Sem) + + -- Note: overriding indicator is an Ada 2005 feature + + ------------------------------- + -- 12.3 Generic Actual Part -- + ------------------------------- + + -- GENERIC_ACTUAL_PART ::= + -- (GENERIC_ASSOCIATION {, GENERIC_ASSOCIATION}) + + ------------------------------- + -- 12.3 Generic Association -- + ------------------------------- + + -- GENERIC_ASSOCIATION ::= + -- [generic_formal_parameter_SELECTOR_NAME =>] + + -- Note: unlike the procedure call case, a generic association node + -- is generated for every association, even if no formal parameter + -- selector name is present. In this case the parser will leave the + -- Selector_Name field set to Empty, to be filled in later by the + -- semantic pass. + + -- In Ada 2005, a formal may be associated with a box, if the + -- association is part of the list of actuals for a formal package. + -- If the association is given by OTHERS => <>, the association is + -- an N_Others_Choice. + + -- N_Generic_Association + -- Sloc points to first token of generic association + -- Selector_Name (Node2) (set to Empty if no formal + -- parameter selector name) + -- Explicit_Generic_Actual_Parameter (Node1) (Empty if box present) + -- Box_Present (Flag15) (for formal_package associations with a box) + + --------------------------------------------- + -- 12.3 Explicit Generic Actual Parameter -- + --------------------------------------------- + + -- EXPLICIT_GENERIC_ACTUAL_PARAMETER ::= + -- EXPRESSION | variable_NAME | subprogram_NAME + -- | entry_NAME | SUBTYPE_MARK | package_instance_NAME + + ------------------------------------- + -- 12.4 Formal Object Declaration -- + ------------------------------------- + + -- FORMAL_OBJECT_DECLARATION ::= + -- DEFINING_IDENTIFIER_LIST : + -- MODE [NULL_EXCLUSION] SUBTYPE_MARK [:= DEFAULT_EXPRESSION]; + -- | DEFINING_IDENTIFIER_LIST : + -- MODE ACCESS_DEFINITION [:= DEFAULT_EXPRESSION]; + + -- Although the syntax allows multiple identifiers in the list, the + -- semantics is as though successive declarations were given with + -- identical type definition and expression components. To simplify + -- semantic processing, the parser represents a multiple declaration + -- case as a sequence of single declarations, using the More_Ids and + -- Prev_Ids flags to preserve the original source form as described + -- in the section on "Handling of Defining Identifier Lists". + + -- N_Formal_Object_Declaration + -- Sloc points to first identifier + -- Defining_Identifier (Node1) + -- In_Present (Flag15) + -- Out_Present (Flag17) + -- Null_Exclusion_Present (Flag11) (set to False if not present) + -- Subtype_Mark (Node4) (set to Empty if not present) + -- Access_Definition (Node3) (set to Empty if not present) + -- Default_Expression (Node5) (set to Empty if no default expression) + -- More_Ids (Flag5) (set to False if no more identifiers in list) + -- Prev_Ids (Flag6) (set to False if no previous identifiers in list) + + ----------------------------------- + -- 12.5 Formal Type Declaration -- + ----------------------------------- + + -- FORMAL_TYPE_DECLARATION ::= + -- type DEFINING_IDENTIFIER [DISCRIMINANT_PART] + -- is FORMAL_TYPE_DEFINITION; + + -- N_Formal_Type_Declaration + -- Sloc points to TYPE + -- Defining_Identifier (Node1) + -- Formal_Type_Definition (Node3) + -- Discriminant_Specifications (List4) (set to No_List if no + -- discriminant part) + -- Unknown_Discriminants_Present (Flag13) set if (<>) discriminant + + ---------------------------------- + -- 12.5 Formal type definition -- + ---------------------------------- + + -- FORMAL_TYPE_DEFINITION ::= + -- FORMAL_PRIVATE_TYPE_DEFINITION + -- | FORMAL_DERIVED_TYPE_DEFINITION + -- | FORMAL_DISCRETE_TYPE_DEFINITION + -- | FORMAL_SIGNED_INTEGER_TYPE_DEFINITION + -- | FORMAL_MODULAR_TYPE_DEFINITION + -- | FORMAL_FLOATING_POINT_DEFINITION + -- | FORMAL_ORDINARY_FIXED_POINT_DEFINITION + -- | FORMAL_DECIMAL_FIXED_POINT_DEFINITION + -- | FORMAL_ARRAY_TYPE_DEFINITION + -- | FORMAL_ACCESS_TYPE_DEFINITION + -- | FORMAL_INTERFACE_TYPE_DEFINITION + + --------------------------------------------- + -- 12.5.1 Formal Private Type Definition -- + --------------------------------------------- + + -- FORMAL_PRIVATE_TYPE_DEFINITION ::= + -- [[abstract] tagged] [limited] private + + -- Note: TAGGED is not allowed in Ada 83 mode + + -- N_Formal_Private_Type_Definition + -- Sloc points to PRIVATE + -- Abstract_Present (Flag4) + -- Tagged_Present (Flag15) + -- Limited_Present (Flag17) + + -------------------------------------------- + -- 12.5.1 Formal Derived Type Definition -- + -------------------------------------------- + + -- FORMAL_DERIVED_TYPE_DEFINITION ::= + -- [abstract] [limited | synchronized] + -- new SUBTYPE_MARK [[and INTERFACE_LIST] with private] + -- Note: this construct is not allowed in Ada 83 mode + + -- N_Formal_Derived_Type_Definition + -- Sloc points to NEW + -- Subtype_Mark (Node4) + -- Private_Present (Flag15) + -- Abstract_Present (Flag4) + -- Limited_Present (Flag17) + -- Synchronized_Present (Flag7) + -- Interface_List (List2) (set to No_List if none) + + --------------------------------------------- + -- 12.5.2 Formal Discrete Type Definition -- + --------------------------------------------- + + -- FORMAL_DISCRETE_TYPE_DEFINITION ::= (<>) + + -- N_Formal_Discrete_Type_Definition + -- Sloc points to ( + + --------------------------------------------------- + -- 12.5.2 Formal Signed Integer Type Definition -- + --------------------------------------------------- + + -- FORMAL_SIGNED_INTEGER_TYPE_DEFINITION ::= range <> + + -- N_Formal_Signed_Integer_Type_Definition + -- Sloc points to RANGE + + -------------------------------------------- + -- 12.5.2 Formal Modular Type Definition -- + -------------------------------------------- + + -- FORMAL_MODULAR_TYPE_DEFINITION ::= mod <> + + -- N_Formal_Modular_Type_Definition + -- Sloc points to MOD + + ---------------------------------------------- + -- 12.5.2 Formal Floating Point Definition -- + ---------------------------------------------- + + -- FORMAL_FLOATING_POINT_DEFINITION ::= digits <> + + -- N_Formal_Floating_Point_Definition + -- Sloc points to DIGITS + + ---------------------------------------------------- + -- 12.5.2 Formal Ordinary Fixed Point Definition -- + ---------------------------------------------------- + + -- FORMAL_ORDINARY_FIXED_POINT_DEFINITION ::= delta <> + + -- N_Formal_Ordinary_Fixed_Point_Definition + -- Sloc points to DELTA + + --------------------------------------------------- + -- 12.5.2 Formal Decimal Fixed Point Definition -- + --------------------------------------------------- + + -- FORMAL_DECIMAL_FIXED_POINT_DEFINITION ::= delta <> digits <> + + -- Note: formal decimal fixed point definition not allowed in Ada 83 + + -- N_Formal_Decimal_Fixed_Point_Definition + -- Sloc points to DELTA + + ------------------------------------------ + -- 12.5.3 Formal Array Type Definition -- + ------------------------------------------ + + -- FORMAL_ARRAY_TYPE_DEFINITION ::= ARRAY_TYPE_DEFINITION + + ------------------------------------------- + -- 12.5.4 Formal Access Type Definition -- + ------------------------------------------- + + -- FORMAL_ACCESS_TYPE_DEFINITION ::= ACCESS_TYPE_DEFINITION + + ---------------------------------------------- + -- 12.5.5 Formal Interface Type Definition -- + ---------------------------------------------- + + -- FORMAL_INTERFACE_TYPE_DEFINITION ::= INTERFACE_TYPE_DEFINITION + + ----------------------------------------- + -- 12.6 Formal Subprogram Declaration -- + ----------------------------------------- + + -- FORMAL_SUBPROGRAM_DECLARATION ::= + -- FORMAL_CONCRETE_SUBPROGRAM_DECLARATION + -- | FORMAL_ABSTRACT_SUBPROGRAM_DECLARATION + + -------------------------------------------------- + -- 12.6 Formal Concrete Subprogram Declaration -- + -------------------------------------------------- + + -- FORMAL_CONCRETE_SUBPROGRAM_DECLARATION ::= + -- with SUBPROGRAM_SPECIFICATION [is SUBPROGRAM_DEFAULT]; + + -- N_Formal_Concrete_Subprogram_Declaration + -- Sloc points to WITH + -- Specification (Node1) + -- Default_Name (Node2) (set to Empty if no subprogram default) + -- Box_Present (Flag15) + + -- Note: if no subprogram default is present, then Name is set + -- to Empty, and Box_Present is False. + + -------------------------------------------------- + -- 12.6 Formal Abstract Subprogram Declaration -- + -------------------------------------------------- + + -- FORMAL_ABSTRACT_SUBPROGRAM_DECLARATION ::= + -- with SUBPROGRAM_SPECIFICATION is abstract [SUBPROGRAM_DEFAULT]; + + -- N_Formal_Abstract_Subprogram_Declaration + -- Sloc points to WITH + -- Specification (Node1) + -- Default_Name (Node2) (set to Empty if no subprogram default) + -- Box_Present (Flag15) + + -- Note: if no subprogram default is present, then Name is set + -- to Empty, and Box_Present is False. + + ------------------------------ + -- 12.6 Subprogram Default -- + ------------------------------ + + -- SUBPROGRAM_DEFAULT ::= DEFAULT_NAME | <> + + -- There is no separate node in the tree for a subprogram default. + -- Instead the parent (N_Formal_Concrete_Subprogram_Declaration + -- or N_Formal_Abstract_Subprogram_Declaration) node contains the + -- default name or box indication, as needed. + + ------------------------ + -- 12.6 Default Name -- + ------------------------ + + -- DEFAULT_NAME ::= NAME + + -------------------------------------- + -- 12.7 Formal Package Declaration -- + -------------------------------------- + + -- FORMAL_PACKAGE_DECLARATION ::= + -- with package DEFINING_IDENTIFIER + -- is new generic_package_NAME FORMAL_PACKAGE_ACTUAL_PART; + + -- Note: formal package declarations not allowed in Ada 83 mode + + -- N_Formal_Package_Declaration + -- Sloc points to WITH + -- Defining_Identifier (Node1) + -- Name (Node2) + -- Generic_Associations (List3) (set to No_List if (<>) case or + -- empty generic actual part) + -- Box_Present (Flag15) + -- Instance_Spec (Node5-Sem) + -- ABE_Is_Certain (Flag18-Sem) + + -------------------------------------- + -- 12.7 Formal Package Actual Part -- + -------------------------------------- + + -- FORMAL_PACKAGE_ACTUAL_PART ::= + -- ([OTHERS] => <>) + -- | [GENERIC_ACTUAL_PART] + -- (FORMAL_PACKAGE_ASSOCIATION {. FORMAL_PACKAGE_ASSOCIATION} + + -- FORMAL_PACKAGE_ASSOCIATION ::= + -- GENERIC_ASSOCIATION + -- | GENERIC_FORMAL_PARAMETER_SELECTOR_NAME => <> + + -- There is no explicit node in the tree for a formal package actual + -- part. Instead the information appears in the parent node (i.e. the + -- formal package declaration node itself). + + -- There is no explicit node for a formal package association. All of + -- them are represented either by a generic association, possibly with + -- Box_Present, or by an N_Others_Choice. + + --------------------------------- + -- 13.1 Representation clause -- + --------------------------------- + + -- REPRESENTATION_CLAUSE ::= + -- ATTRIBUTE_DEFINITION_CLAUSE + -- | ENUMERATION_REPRESENTATION_CLAUSE + -- | RECORD_REPRESENTATION_CLAUSE + -- | AT_CLAUSE + + ---------------------- + -- 13.1 Local Name -- + ---------------------- + + -- LOCAL_NAME := + -- DIRECT_NAME + -- | DIRECT_NAME'ATTRIBUTE_DESIGNATOR + -- | library_unit_NAME + + -- The construct DIRECT_NAME'ATTRIBUTE_DESIGNATOR appears in the tree + -- as an attribute reference, which has essentially the same form. + + --------------------------------------- + -- 13.3 Attribute definition clause -- + --------------------------------------- + + -- ATTRIBUTE_DEFINITION_CLAUSE ::= + -- for LOCAL_NAME'ATTRIBUTE_DESIGNATOR use EXPRESSION; + -- | for LOCAL_NAME'ATTRIBUTE_DESIGNATOR use NAME; + + -- In Ada 83, the expression must be a simple expression and the + -- local name must be a direct name. + + -- Note: the only attribute definition clause that is processed by + -- gigi is an address clause. For all other cases, the information + -- is extracted by the front end and either results in setting entity + -- information, e.g. Esize for the Size clause, or in appropriate + -- expansion actions (e.g. in the case of Storage_Size). + + -- For an address clause, Gigi constructs the appropriate addressing + -- code. It also ensures that no aliasing optimizations are made + -- for the object for which the address clause appears. + + -- Note: for an address clause used to achieve an overlay: + + -- A : Integer; + -- B : Integer; + -- for B'Address use A'Address; + + -- the above rule means that Gigi will ensure that no optimizations + -- will be made for B that would violate the implementation advice + -- of RM 13.3(19). However, this advice applies only to B and not + -- to A, which seems unfortunate. The GNAT front end will mark the + -- object A as volatile to also prevent unwanted optimization + -- assumptions based on no aliasing being made for B. + + -- N_Attribute_Definition_Clause + -- Sloc points to FOR + -- Name (Node2) the local name + -- Chars (Name1) the identifier name from the attribute designator + -- Expression (Node3) the expression or name + -- Entity (Node4-Sem) + -- Next_Rep_Item (Node5-Sem) + -- From_At_Mod (Flag4-Sem) + -- Check_Address_Alignment (Flag11-Sem) + -- Address_Warning_Posted (Flag18-Sem) + + --------------------------------------------- + -- 13.4 Enumeration representation clause -- + --------------------------------------------- + + -- ENUMERATION_REPRESENTATION_CLAUSE ::= + -- for first_subtype_LOCAL_NAME use ENUMERATION_AGGREGATE; + + -- In Ada 83, the name must be a direct name + + -- N_Enumeration_Representation_Clause + -- Sloc points to FOR + -- Identifier (Node1) direct name + -- Array_Aggregate (Node3) + -- Next_Rep_Item (Node5-Sem) + + --------------------------------- + -- 13.4 Enumeration aggregate -- + --------------------------------- + + -- ENUMERATION_AGGREGATE ::= ARRAY_AGGREGATE + + ------------------------------------------ + -- 13.5.1 Record representation clause -- + ------------------------------------------ + + -- RECORD_REPRESENTATION_CLAUSE ::= + -- for first_subtype_LOCAL_NAME use + -- record [MOD_CLAUSE] + -- {COMPONENT_CLAUSE} + -- end record; + + -- Gigi restriction: Mod_Clause is always Empty (if present it is + -- replaced by a corresponding Alignment attribute definition clause). + + -- Note: Component_Clauses can include pragmas + + -- N_Record_Representation_Clause + -- Sloc points to FOR + -- Identifier (Node1) direct name + -- Mod_Clause (Node2) (set to Empty if no mod clause present) + -- Component_Clauses (List3) + -- Next_Rep_Item (Node5-Sem) + + ------------------------------ + -- 13.5.1 Component clause -- + ------------------------------ + + -- COMPONENT_CLAUSE ::= + -- component_LOCAL_NAME at POSITION + -- range FIRST_BIT .. LAST_BIT; + + -- N_Component_Clause + -- Sloc points to AT + -- Component_Name (Node1) points to Name or Attribute_Reference + -- Position (Node2) + -- First_Bit (Node3) + -- Last_Bit (Node4) + + ---------------------- + -- 13.5.1 Position -- + ---------------------- + + -- POSITION ::= static_EXPRESSION + + ----------------------- + -- 13.5.1 First_Bit -- + ----------------------- + + -- FIRST_BIT ::= static_SIMPLE_EXPRESSION + + ---------------------- + -- 13.5.1 Last_Bit -- + ---------------------- + + -- LAST_BIT ::= static_SIMPLE_EXPRESSION + + -------------------------- + -- 13.8 Code statement -- + -------------------------- + + -- CODE_STATEMENT ::= QUALIFIED_EXPRESSION; + + -- Note: in GNAT, the qualified expression has the form + + -- Asm_Insn'(Asm (...)); + + -- See package System.Machine_Code in file s-maccod.ads for details on + -- the allowed parameters to Asm. There are two ways this node can + -- arise, as a code statement, in which case the expression is the + -- qualified expression, or as a result of the expansion of an intrinsic + -- call to the Asm or Asm_Input procedure. + + -- N_Code_Statement + -- Sloc points to first token of the expression + -- Expression (Node3) + + -- Note: package Exp_Code contains an abstract functional interface + -- for use by Gigi in accessing the data from N_Code_Statement nodes. + + ------------------------ + -- 13.12 Restriction -- + ------------------------ + + -- RESTRICTION ::= + -- restriction_IDENTIFIER + -- | restriction_parameter_IDENTIFIER => EXPRESSION + + -- There is no explicit node for restrictions. Instead the restriction + -- appears in normal pragma syntax as a pragma argument association, + -- which has the same syntactic form. + + -------------------------- + -- B.2 Shift Operators -- + -------------------------- + + -- Calls to the intrinsic shift functions are converted to one of + -- the following shift nodes, which have the form of normal binary + -- operator names. Note that for a given shift operation, one node + -- covers all possible types, as for normal operators. + + -- Note: it is perfectly permissible for the expander to generate + -- shift operation nodes directly, in which case they will be analyzed + -- and parsed in the usual manner. + + -- Sprint syntax: shift-function-name!(expr, count) + + -- Note: the Left_Opnd field holds the first argument (the value to + -- be shifted). The Right_Opnd field holds the second argument (the + -- shift count). The Chars field is the name of the intrinsic function. + + -- N_Op_Rotate_Left + -- Sloc points to the function name + -- plus fields for binary operator + -- plus fields for expression + -- Shift_Count_OK (Flag4-Sem) + + -- N_Op_Rotate_Right + -- Sloc points to the function name + -- plus fields for binary operator + -- plus fields for expression + -- Shift_Count_OK (Flag4-Sem) + + -- N_Op_Shift_Left + -- Sloc points to the function name + -- plus fields for binary operator + -- plus fields for expression + -- Shift_Count_OK (Flag4-Sem) + + -- N_Op_Shift_Right_Arithmetic + -- Sloc points to the function name + -- plus fields for binary operator + -- plus fields for expression + -- Shift_Count_OK (Flag4-Sem) + + -- N_Op_Shift_Right + -- Sloc points to the function name + -- plus fields for binary operator + -- plus fields for expression + -- Shift_Count_OK (Flag4-Sem) + + -------------------------- + -- Obsolescent Features -- + -------------------------- + + -- The syntax descriptions and tree nodes for obsolescent features are + -- grouped together, corresponding to their location in appendix I in + -- the RM. However, parsing and semantic analysis for these constructs + -- is located in an appropriate chapter (see individual notes). + + --------------------------- + -- J.3 Delta Constraint -- + --------------------------- + + -- Note: the parse routine for this construct is located in section + -- 3.5.9 of Par-Ch3, and semantic analysis is in Sem_Ch3, which is + -- where delta constraint logically belongs. + + -- DELTA_CONSTRAINT ::= DELTA static_EXPRESSION [RANGE_CONSTRAINT] + + -- N_Delta_Constraint + -- Sloc points to DELTA + -- Delta_Expression (Node3) + -- Range_Constraint (Node4) (set to Empty if not present) + + -------------------- + -- J.7 At Clause -- + -------------------- + + -- AT_CLAUSE ::= for DIRECT_NAME use at EXPRESSION; + + -- Note: the parse routine for this construct is located in Par-Ch13, + -- and the semantic analysis is in Sem_Ch13, where at clause logically + -- belongs if it were not obsolescent. + + -- Note: in Ada 83 the expression must be a simple expression + + -- Gigi restriction: This node never appears, it is rewritten as an + -- address attribute definition clause. + + -- N_At_Clause + -- Sloc points to FOR + -- Identifier (Node1) + -- Expression (Node3) + + --------------------- + -- J.8 Mod clause -- + --------------------- + + -- MOD_CLAUSE ::= at mod static_EXPRESSION; + + -- Note: the parse routine for this construct is located in Par-Ch13, + -- and the semantic analysis is in Sem_Ch13, where mod clause logically + -- belongs if it were not obsolescent. + + -- Note: in Ada 83, the expression must be a simple expression + + -- Gigi restriction: this node never appears. It is replaced + -- by a corresponding Alignment attribute definition clause. + + -- Note: pragmas can appear before and after the MOD_CLAUSE since + -- its name has "clause" in it. This is rather strange, but is quite + -- definitely specified. The pragmas before are collected in the + -- Pragmas_Before field of the mod clause node itself, and pragmas + -- after are simply swallowed up in the list of component clauses. + + -- N_Mod_Clause + -- Sloc points to AT + -- Expression (Node3) + -- Pragmas_Before (List4) Pragmas before mod clause (No_List if none) + + -------------------- + -- Semantic Nodes -- + -------------------- + + -- These semantic nodes are used to hold additional semantic information. + -- They are inserted into the tree as a result of semantic processing. + -- Although there are no legitimate source syntax constructions that + -- correspond directly to these nodes, we need a source syntax for the + -- reconstructed tree printed by Sprint, and the node descriptions here + -- show this syntax. + + ---------------------------- + -- Conditional Expression -- + ---------------------------- + + -- This node is used to represent an expression corresponding to the + -- C construct (condition ? then-expression : else_expression), where + -- Expressions is a three element list, whose first expression is the + -- condition, and whose second and third expressions are the then and + -- else expressions respectively. + + -- Note: the Then_Actions and Else_Actions fields are always set to + -- No_List in the tree passed to Gigi. These fields are used only + -- for temporary processing purposes in the expander. + + -- Sprint syntax: (if expr then expr else expr) + + -- N_Conditional_Expression + -- Sloc points to related node + -- Expressions (List1) + -- Then_Actions (List2-Sem) + -- Else_Actions (List3-Sem) + -- plus fields for expression + + -- Note: in the case where a debug source file is generated, the Sloc + -- for this node points to the IF keyword in the Sprint file output. + + ------------------- + -- Expanded_Name -- + ------------------- + + -- The N_Expanded_Name node is used to represent a selected component + -- name that has been resolved to an expanded name. The semantic phase + -- replaces N_Selected_Component nodes that represent names by the use + -- of this node, leaving the N_Selected_Component node used only when + -- the prefix is a record or protected type. + + -- The fields of the N_Expanded_Name node are layed out identically + -- to those of the N_Selected_Component node, allowing conversion of + -- an expanded name node to a selected component node to be done + -- easily, see Sinfo.CN.Change_Selected_Component_To_Expanded_Name. + + -- There is no special sprint syntax for an expanded name + + -- N_Expanded_Name + -- Sloc points to the period + -- Chars (Name1) copy of Chars field of selector name + -- Prefix (Node3) + -- Selector_Name (Node2) + -- Entity (Node4-Sem) + -- Associated_Node (Node4-Sem) + -- Redundant_Use (Flag13-Sem) + -- Has_Private_View (Flag11-Sem) set in generic units. + -- plus fields for expression + + -------------------- + -- Free Statement -- + -------------------- + + -- The N_Free_Statement node is generated as a result of a call to an + -- instantiation of Unchecked_Deallocation. The instantiation of this + -- generic is handled specially and generates this node directly. + + -- Sprint syntax: free expression + + -- N_Free_Statement + -- Sloc is copied from the unchecked deallocation call + -- Expression (Node3) argument to unchecked deallocation call + -- Storage_Pool (Node1-Sem) + -- Procedure_To_Call (Node2-Sem) + -- Actual_Designated_Subtype (Node4-Sem) + + -- Note: in the case where a debug source file is generated, the Sloc + -- for this node points to the FREE keyword in the Sprint file output. + + ------------------- + -- Freeze Entity -- + ------------------- + + -- This node marks the point in a declarative part at which an entity + -- declared therein becomes frozen. The expander places initialization + -- procedures for types at those points. Gigi uses the freezing point + -- to elaborate entities that may depend on previous private types. + + -- See the section in Einfo "Delayed Freezing and Elaboration" for + -- a full description of the use of this node. + + -- The Entity field points back to the entity for the type (whose + -- Freeze_Node field points back to this freeze node). + + -- The Actions field contains a list of declarations and statements + -- generated by the expander which are associated with the freeze + -- node, and are elaborated as though the freeze node were replaced + -- by this sequence of actions. + + -- Note: the Sloc field in the freeze node references a construct + -- associated with the freezing point. This is used for posting + -- messages in some error/warning situations, e.g. the case where + -- a primitive operation of a tagged type is declared too late. + + -- Sprint syntax: freeze entity-name [ + -- freeze actions + -- ] + + -- N_Freeze_Entity + -- Sloc points near freeze point (see above special note) + -- Entity (Node4-Sem) + -- Access_Types_To_Process (Elist2-Sem) (set to No_Elist if none) + -- TSS_Elist (Elist3-Sem) (set to No_Elist if no associated TSS's) + -- Actions (List1) (set to No_List if no freeze actions) + -- First_Subtype_Link (Node5-Sem) (set to Empty if no link) + + -- The Actions field holds actions associated with the freeze. These + -- actions are elaborated at the point where the type is frozen. + + -- Note: in the case where a debug source file is generated, the Sloc + -- for this node points to the FREEZE keyword in the Sprint file output. + + -------------------------------- + -- Implicit Label Declaration -- + -------------------------------- + + -- An implicit label declaration is created for every occurrence of a + -- label on a statement or a label on a block or loop. It is chained + -- in the declarations of the innermost enclosing block as specified + -- in RM section 5.1 (3). + + -- The Defining_Identifier is the actual identifier for the + -- statement identifier. Note that the occurrence of the label + -- is a reference, NOT the defining occurrence. The defining + -- occurrence occurs at the head of the innermost enclosing + -- block, and is represented by this node. + + -- Note: from the grammar, this might better be called an implicit + -- statement identifier declaration, but the term we choose seems + -- friendlier, since at least informally statement identifiers are + -- called labels in both cases (i.e. when used in labels, and when + -- used as the identifiers of blocks and loops). + + -- Note: although this is logically a semantic node, since it does + -- not correspond directly to a source syntax construction, these + -- nodes are actually created by the parser in a post pass done just + -- after parsing is complete, before semantic analysis is started (see + -- the Par.Labl subunit in file par-labl.adb). + + -- Sprint syntax: labelname : label; + + -- N_Implicit_Label_Declaration + -- Sloc points to the << of the label + -- Defining_Identifier (Node1) + -- Label_Construct (Node2-Sem) + + -- Note: in the case where a debug source file is generated, the Sloc + -- for this node points to the label name in the generated declaration. + + --------------------- + -- Itype_Reference -- + --------------------- + + -- This node is used to create a reference to an Itype. The only + -- purpose is to make sure that the Itype is defined if this is the + -- first reference. + + -- A typical use of this node is when an Itype is to be referenced in + -- two branches of an if statement. In this case it is important that + -- the first use of the Itype not be inside the conditional, since + -- then it might not be defined if the wrong branch of the if is + -- taken in the case where the definition generates elaboration code. + + -- The Itype field points to the referenced Itype + + -- sprint syntax: reference itype-name + + -- N_Itype_Reference + -- Sloc points to the node generating the reference + -- Itype (Node1-Sem) + + -- Note: in the case where a debug source file is generated, the Sloc + -- for this node points to the REFERENCE keyword in the file output. + + --------------------- + -- Raise_xxx_Error -- + --------------------- + + -- One of these nodes is created during semantic analysis to replace + -- a node for an expression that is determined to definitely raise + -- the corresponding exception. + + -- The N_Raise_xxx_Error node may also stand alone in place + -- of a declaration or statement, in which case it simply causes + -- the exception to be raised (i.e. it is equivalent to a raise + -- statement that raises the corresponding exception). This use + -- is distinguished by the fact that the Etype in this case is + -- Standard_Void_Type, In the subexpression case, the Etype is the + -- same as the type of the subexpression which it replaces. + + -- If Condition is empty, then the raise is unconditional. If the + -- Condition field is non-empty, it is a boolean expression which + -- is first evaluated, and the exception is raised only if the + -- value of the expression is True. In the unconditional case, the + -- creation of this node is usually accompanied by a warning message + -- error. The creation of this node will usually be accompanied by a + -- message (unless it appears within the right operand of a short + -- circuit form whose left argument is static and decisively + -- eliminates elaboration of the raise operation. The condition field + -- can ONLY be present when the node is used as a statement form, it + -- may NOT be present in the case where the node appears within an + -- expression. + + -- The exception is generated with a message that contains the + -- file name and line number, and then appended text. The Reason + -- code shows the text to be added. The Reason code is an element + -- of the type Types.RT_Exception_Code, and indicates both the + -- message to be added, and the exception to be raised (which must + -- match the node type). The value is stored by storing a Uint which + -- is the Pos value of the enumeration element in this type. + + -- Gigi restriction: This expander ensures that the type of the + -- Condition field is always Standard.Boolean, even if the type + -- in the source is some non-standard boolean type. + + -- Sprint syntax: [xxx_error "msg"] + -- or: [xxx_error when condition "msg"] + + -- N_Raise_Constraint_Error + -- Sloc references related construct + -- Condition (Node1) (set to Empty if no condition) + -- Reason (Uint3) + -- plus fields for expression + + -- N_Raise_Program_Error + -- Sloc references related construct + -- Condition (Node1) (set to Empty if no condition) + -- Reason (Uint3) + -- plus fields for expression + + -- N_Raise_Storage_Error + -- Sloc references related construct + -- Condition (Node1) (set to Empty if no condition) + -- Reason (Uint3) + -- plus fields for expression + + -- Note: Sloc is copied from the expression generating the exception. + -- In the case where a debug source file is generated, the Sloc for + -- this node points to the left bracket in the Sprint file output. + + -- Note: the back end may be required to translate these nodes into + -- appropriate goto statements. See description of N_Push/Pop_xxx_Label. + + --------------------------------------------- + -- Optimization of Exception Raise to Goto -- + --------------------------------------------- + + -- In some cases, the front end will determine that any exception raised + -- by the back end for a certain exception should be transformed into a + -- goto statement. + + -- There are three kinds of exceptions raised by the back end (note that + -- for this purpose we consider gigi to be part of the back end in the + -- gcc case): + + -- 1. Exceptions resulting from N_Raise_xxx_Error nodes + -- 2. Exceptions from checks triggered by Do_xxx_Check flags + -- 3. Other cases not specifically marked by the front end + + -- Normally all such exceptions are translated into calls to the proper + -- Rcheck_xx procedure, where xx encodes both the exception to be raised + -- and the exception message. + + -- The front end may determine that for a particular sequence of code, + -- exceptions in any of these three categories for a particular builtin + -- exception should result in a goto, rather than a call to Rcheck_xx. + -- The exact sequence to be generated is: + + -- Local_Raise (exception'Identity); + -- goto Label + + -- The front end marks such a sequence of code by bracketing it with + -- push and pop nodes: + + -- N_Push_xxx_Label (referencing the label) + -- ... + -- (code where transformation is expected for exception xxx) + -- ... + -- N_Pop_xxx_Label + + -- The use of push/pop reflects the fact that such regions can properly + -- nest, and one special case is a subregion in which no transformation + -- is allowed. Such a region is marked by a N_Push_xxx_Label node whose + -- Exception_Label field is Empty. + + -- N_Push_Constraint_Error_Label + -- Sloc references first statement in region covered + -- Exception_Label (Node5-Sem) + + -- N_Push_Program_Error_Label + -- Sloc references first statement in region covered + -- Exception_Label (Node5-Sem) + + -- N_Push_Storage_Error_Label + -- Sloc references first statement in region covered + -- Exception_Label (Node5-Sem) + + -- N_Pop_Constraint_Error_Label + -- Sloc references last statement in region covered + + -- N_Pop_Program_Error_Label + -- Sloc references last statement in region covered + + -- N_Pop_Storage_Error_Label + -- Sloc references last statement in region covered + + --------------- + -- Reference -- + --------------- + + -- For a number of purposes, we need to construct references to objects. + -- These references are subsequently treated as normal access values. + -- An example is the construction of the parameter block passed to a + -- task entry. The N_Reference node is provided for this purpose. It is + -- similar in effect to the use of the Unrestricted_Access attribute, + -- and like Unrestricted_Access can be applied to objects which would + -- not be valid prefixes for the Unchecked_Access attribute (e.g. + -- objects which are not aliased, and slices). In addition it can be + -- applied to composite type values as well as objects, including string + -- values and aggregates. + + -- Note: we use the Prefix field for this expression so that the + -- resulting node can be treated using common code with the attribute + -- nodes for the 'Access and related attributes. Logically it would make + -- more sense to call it an Expression field, but then we would have to + -- special case the treatment of the N_Reference node. + + -- Sprint syntax: prefix'reference + + -- N_Reference + -- Sloc is copied from the expression + -- Prefix (Node3) + -- plus fields for expression + + -- Note: in the case where a debug source file is generated, the Sloc + -- for this node points to the quote in the Sprint file output. + + --------------------- + -- Subprogram_Info -- + --------------------- + + -- This node generates the appropriate Subprogram_Info value for a + -- given procedure. See Ada.Exceptions for further details + + -- Sprint syntax: subprog'subprogram_info + + -- N_Subprogram_Info + -- Sloc points to the entity for the procedure + -- Identifier (Node1) identifier referencing the procedure + -- Etype (Node5-Sem) type (always set to Ada.Exceptions.Code_Loc + + -- Note: in the case where a debug source file is generated, the Sloc + -- for this node points to the quote in the Sprint file output. + + -------------------------- + -- Unchecked Expression -- + -------------------------- + + -- An unchecked expression is one that must be analyzed and resolved + -- with all checks off, regardless of the current setting of scope + -- suppress flags. + + -- Sprint syntax: `(expression) + + -- Note: this node is always removed from the tree (and replaced by + -- its constituent expression) on completion of analysis, so it only + -- appears in intermediate trees, and will never be seen by Gigi. + + -- N_Unchecked_Expression + -- Sloc is a copy of the Sloc of the expression + -- Expression (Node3) + -- plus fields for expression + + -- Note: in the case where a debug source file is generated, the Sloc + -- for this node points to the back quote in the Sprint file output. + + ------------------------------- + -- Unchecked Type Conversion -- + ------------------------------- + + -- An unchecked type conversion node represents the semantic action + -- corresponding to a call to an instantiation of Unchecked_Conversion. + -- It is generated as a result of actual use of Unchecked_Conversion + -- and also the expander generates unchecked type conversion nodes + -- directly for expansion of complex semantic actions. + + -- Note: an unchecked type conversion is a variable as far as the + -- semantics are concerned, which is convenient for the expander. + -- This does not change what Ada source programs are legal, since + -- clearly a function call to an instantiation of Unchecked_Conversion + -- is not a variable in any case. + + -- Sprint syntax: subtype-mark!(expression) + + -- N_Unchecked_Type_Conversion + -- Sloc points to related node in source + -- Subtype_Mark (Node4) + -- Expression (Node3) + -- Kill_Range_Check (Flag11-Sem) + -- No_Truncation (Flag17-Sem) + -- plus fields for expression + + -- Note: in the case where a debug source file is generated, the Sloc + -- for this node points to the exclamation in the Sprint file output. + + ----------------------------------- + -- Validate_Unchecked_Conversion -- + ----------------------------------- + + -- The front end does most of the validation of unchecked conversion, + -- including checking sizes (this is done after the back end is called + -- to take advantage of back-annotation of calculated sizes). + + -- The front end also deals with specific cases that are not allowed + -- e.g. involving unconstrained array types. + + -- For the case of the standard gigi backend, this means that all + -- checks are done in the front-end. + + -- However, in the case of specialized back-ends, notably the JVM + -- backend for JGNAT, additional requirements and restrictions apply + -- to unchecked conversion, and these are most conveniently performed + -- in the specialized back-end. + + -- To accommodate this requirement, for such back ends, the following + -- special node is generated recording an unchecked conversion that + -- needs to be validated. The back end should post an appropriate + -- error message if the unchecked conversion is invalid or warrants + -- a special warning message. + + -- Source_Type and Target_Type point to the entities for the two + -- types involved in the unchecked conversion instantiation that + -- is to be validated. + + -- Sprint syntax: validate Unchecked_Conversion (source, target); + + -- N_Validate_Unchecked_Conversion + -- Sloc points to instantiation (location for warning message) + -- Source_Type (Node1-Sem) + -- Target_Type (Node2-Sem) + + -- Note: in the case where a debug source file is generated, the Sloc + -- for this node points to the VALIDATE keyword in the file output. + + ----------- + -- Empty -- + ----------- + + -- Used as the contents of the Nkind field of the dummy Empty node + -- and in some other situations to indicate an uninitialized value. + + -- N_Empty + -- Chars (Name1) is set to No_Name + + ----------- + -- Error -- + ----------- + + -- Used as the contents of the Nkind field of the dummy Error node. + -- Has an Etype field, which gets set to Any_Type later on, to help + -- error recovery (Error_Posted is also set in the Error node). + + -- N_Error + -- Chars (Name1) is set to Error_Name + -- Etype (Node5-Sem) + + -------------------------- + -- Node Type Definition -- + -------------------------- + + -- The following is the definition of the Node_Kind type. As previously + -- discussed, this is separated off to allow rearrangement of the order + -- to facilitate definition of subtype ranges. The comments show the + -- subtype classes which apply to each set of node kinds. The first + -- entry in the comment characterizes the following list of nodes. + + type Node_Kind is ( + N_Unused_At_Start, + + -- N_Representation_Clause + + N_At_Clause, + N_Component_Clause, + N_Enumeration_Representation_Clause, + N_Mod_Clause, + N_Record_Representation_Clause, + + -- N_Representation_Clause, N_Has_Chars + + N_Attribute_Definition_Clause, + + -- N_Has_Chars + + N_Empty, + N_Pragma_Argument_Association, + + -- N_Has_Etype + + N_Error, + + -- N_Entity, N_Has_Etype, N_Has_Chars + + N_Defining_Character_Literal, + N_Defining_Identifier, + N_Defining_Operator_Symbol, + + -- N_Subexpr, N_Has_Etype, N_Has_Chars, N_Has_Entity + + N_Expanded_Name, + + -- N_Direct_Name, N_Subexpr, N_Has_Etype, + -- N_Has_Chars, N_Has_Entity + + N_Identifier, + N_Operator_Symbol, + + -- N_Direct_Name, N_Subexpr, N_Has_Etype, + -- N_Has_Chars, N_Has_Entity + + N_Character_Literal, + + -- N_Binary_Op, N_Op, N_Subexpr, + -- N_Has_Etype, N_Has_Chars, N_Has_Entity + + N_Op_Add, + N_Op_Concat, + N_Op_Expon, + N_Op_Subtract, + + -- N_Binary_Op, N_Op, N_Subexpr, N_Has_Treat_Fixed_As_Integer + -- N_Has_Etype, N_Has_Chars, N_Has_Entity, N_Multiplying_Operator + + N_Op_Divide, + N_Op_Mod, + N_Op_Multiply, + N_Op_Rem, + + -- N_Binary_Op, N_Op, N_Subexpr, N_Has_Etype + -- N_Has_Entity, N_Has_Chars, N_Op_Boolean + + N_Op_And, + + -- N_Binary_Op, N_Op, N_Subexpr, N_Has_Etype + -- N_Has_Entity, N_Has_Chars, N_Op_Boolean, N_Op_Compare + + N_Op_Eq, + N_Op_Ge, + N_Op_Gt, + N_Op_Le, + N_Op_Lt, + N_Op_Ne, + + -- N_Binary_Op, N_Op, N_Subexpr, N_Has_Etype + -- N_Has_Entity, N_Has_Chars, N_Op_Boolean + + N_Op_Or, + N_Op_Xor, + + -- N_Binary_Op, N_Op, N_Subexpr, N_Has_Etype, + -- N_Op_Shift, N_Has_Chars, N_Has_Entity + + N_Op_Rotate_Left, + N_Op_Rotate_Right, + N_Op_Shift_Left, + N_Op_Shift_Right, + N_Op_Shift_Right_Arithmetic, + + -- N_Unary_Op, N_Op, N_Subexpr, N_Has_Etype, + -- N_Has_Chars, N_Has_Entity + + N_Op_Abs, + N_Op_Minus, + N_Op_Not, + N_Op_Plus, + + -- N_Subexpr, N_Has_Etype, N_Has_Entity + + N_Attribute_Reference, + + -- N_Subexpr, N_Has_Etype, N_Membership_Test + + N_In, + N_Not_In, + + -- N_Subexpr, N_Has_Etype + + N_And_Then, + N_Conditional_Expression, + N_Explicit_Dereference, + N_Function_Call, + N_Indexed_Component, + N_Integer_Literal, + N_Null, + N_Or_Else, + N_Procedure_Call_Statement, + N_Qualified_Expression, + + -- N_Raise_xxx_Error, N_Subexpr, N_Has_Etype + + N_Raise_Constraint_Error, + N_Raise_Program_Error, + N_Raise_Storage_Error, + + -- N_Subexpr, N_Has_Etype + + N_Aggregate, + N_Allocator, + N_Extension_Aggregate, + N_Range, + N_Real_Literal, + N_Reference, + N_Selected_Component, + N_Slice, + N_String_Literal, + N_Subprogram_Info, + N_Type_Conversion, + N_Unchecked_Expression, + N_Unchecked_Type_Conversion, + + -- N_Has_Etype + + N_Subtype_Indication, + + -- N_Declaration + + N_Component_Declaration, + N_Entry_Declaration, + N_Formal_Object_Declaration, + N_Formal_Type_Declaration, + N_Full_Type_Declaration, + N_Incomplete_Type_Declaration, + N_Loop_Parameter_Specification, + N_Object_Declaration, + N_Protected_Type_Declaration, + N_Private_Extension_Declaration, + N_Private_Type_Declaration, + N_Subtype_Declaration, + + -- N_Subprogram_Specification, N_Declaration + + N_Function_Specification, + N_Procedure_Specification, + + -- N_Access_To_Subprogram_Definition + + N_Access_Function_Definition, + N_Access_Procedure_Definition, + + -- N_Later_Decl_Item + + N_Task_Type_Declaration, + + -- N_Body_Stub, N_Later_Decl_Item + + N_Package_Body_Stub, + N_Protected_Body_Stub, + N_Subprogram_Body_Stub, + N_Task_Body_Stub, + + -- N_Generic_Instantiation, N_Later_Decl_Item + -- N_Subprogram_Instantiation + + N_Function_Instantiation, + N_Procedure_Instantiation, + + -- N_Generic_Instantiation, N_Later_Decl_Item + + N_Package_Instantiation, + + -- N_Unit_Body, N_Later_Decl_Item, N_Proper_Body + + N_Package_Body, + N_Subprogram_Body, + + -- N_Later_Decl_Item, N_Proper_Body + + N_Protected_Body, + N_Task_Body, + + -- N_Later_Decl_Item + + N_Implicit_Label_Declaration, + N_Package_Declaration, + N_Single_Task_Declaration, + N_Subprogram_Declaration, + N_Use_Package_Clause, + + -- N_Generic_Declaration, N_Later_Decl_Item + + N_Generic_Package_Declaration, + N_Generic_Subprogram_Declaration, + + -- N_Array_Type_Definition + + N_Constrained_Array_Definition, + N_Unconstrained_Array_Definition, + + -- N_Renaming_Declaration + + N_Exception_Renaming_Declaration, + N_Object_Renaming_Declaration, + N_Package_Renaming_Declaration, + N_Subprogram_Renaming_Declaration, + + -- N_Generic_Renaming_Declaration, N_Renaming_Declaration + + N_Generic_Function_Renaming_Declaration, + N_Generic_Package_Renaming_Declaration, + N_Generic_Procedure_Renaming_Declaration, + + -- N_Statement_Other_Than_Procedure_Call + + N_Abort_Statement, + N_Accept_Statement, + N_Assignment_Statement, + N_Asynchronous_Select, + N_Block_Statement, + N_Case_Statement, + N_Code_Statement, + N_Conditional_Entry_Call, + + -- N_Statement_Other_Than_Procedure_Call. N_Delay_Statement + + N_Delay_Relative_Statement, + N_Delay_Until_Statement, + + -- N_Statement_Other_Than_Procedure_Call + + N_Entry_Call_Statement, + N_Free_Statement, + N_Goto_Statement, + N_Loop_Statement, + N_Null_Statement, + N_Raise_Statement, + N_Requeue_Statement, + N_Return_Statement, -- renamed as N_Simple_Return_Statement below + N_Extended_Return_Statement, + N_Selective_Accept, + N_Timed_Entry_Call, + + -- N_Statement_Other_Than_Procedure_Call, N_Has_Condition + + N_Exit_Statement, + N_If_Statement, + + -- N_Has_Condition + + N_Accept_Alternative, + N_Delay_Alternative, + N_Elsif_Part, + N_Entry_Body_Formal_Part, + N_Iteration_Scheme, + N_Terminate_Alternative, + + -- N_Formal_Subprogram_Declaration + + N_Formal_Abstract_Subprogram_Declaration, + N_Formal_Concrete_Subprogram_Declaration, + + -- N_Push_xxx_Label, N_Push_Pop_xxx_Label + + N_Push_Constraint_Error_Label, + N_Push_Program_Error_Label, + N_Push_Storage_Error_Label, + + -- N_Pop_xxx_Label, N_Push_Pop_xxx_Label + + N_Pop_Constraint_Error_Label, + N_Pop_Program_Error_Label, + N_Pop_Storage_Error_Label, + + -- Other nodes (not part of any subtype class) + + N_Abortable_Part, + N_Abstract_Subprogram_Declaration, + N_Access_Definition, + N_Access_To_Object_Definition, + N_Case_Statement_Alternative, + N_Compilation_Unit, + N_Compilation_Unit_Aux, + N_Component_Association, + N_Component_Definition, + N_Component_List, + N_Derived_Type_Definition, + N_Decimal_Fixed_Point_Definition, + N_Defining_Program_Unit_Name, + N_Delta_Constraint, + N_Designator, + N_Digits_Constraint, + N_Discriminant_Association, + N_Discriminant_Specification, + N_Enumeration_Type_Definition, + N_Entry_Body, + N_Entry_Call_Alternative, + N_Entry_Index_Specification, + N_Exception_Declaration, + N_Exception_Handler, + N_Floating_Point_Definition, + N_Formal_Decimal_Fixed_Point_Definition, + N_Formal_Derived_Type_Definition, + N_Formal_Discrete_Type_Definition, + N_Formal_Floating_Point_Definition, + N_Formal_Modular_Type_Definition, + N_Formal_Ordinary_Fixed_Point_Definition, + N_Formal_Package_Declaration, + N_Formal_Private_Type_Definition, + N_Formal_Signed_Integer_Type_Definition, + N_Freeze_Entity, + N_Generic_Association, + N_Handled_Sequence_Of_Statements, + N_Index_Or_Discriminant_Constraint, + N_Itype_Reference, + N_Label, + N_Modular_Type_Definition, + N_Number_Declaration, + N_Ordinary_Fixed_Point_Definition, + N_Others_Choice, + N_Package_Specification, + N_Parameter_Association, + N_Parameter_Specification, + N_Pragma, + N_Protected_Definition, + N_Range_Constraint, + N_Real_Range_Specification, + N_Record_Definition, + N_Signed_Integer_Type_Definition, + N_Single_Protected_Declaration, + N_Subunit, + N_Task_Definition, + N_Triggering_Alternative, + N_Use_Type_Clause, + N_Validate_Unchecked_Conversion, + N_Variant, + N_Variant_Part, + N_With_Clause, + N_Unused_At_End); + + for Node_Kind'Size use 8; + -- The data structures in Atree assume this! + + ---------------------------- + -- Node Class Definitions -- + ---------------------------- + + subtype N_Access_To_Subprogram_Definition is Node_Kind range + N_Access_Function_Definition .. + N_Access_Procedure_Definition; + + subtype N_Array_Type_Definition is Node_Kind range + N_Constrained_Array_Definition .. + N_Unconstrained_Array_Definition; + + subtype N_Binary_Op is Node_Kind range + N_Op_Add .. + N_Op_Shift_Right_Arithmetic; + + subtype N_Body_Stub is Node_Kind range + N_Package_Body_Stub .. + N_Task_Body_Stub; + + subtype N_Declaration is Node_Kind range + N_Component_Declaration .. + N_Procedure_Specification; + -- Note: this includes all constructs normally thought of as declarations + -- except those which are separately grouped as later declarations. + + subtype N_Delay_Statement is Node_Kind range + N_Delay_Relative_Statement .. + N_Delay_Until_Statement; + + subtype N_Direct_Name is Node_Kind range + N_Identifier .. + N_Character_Literal; + + subtype N_Entity is Node_Kind range + N_Defining_Character_Literal .. + N_Defining_Operator_Symbol; + + subtype N_Formal_Subprogram_Declaration is Node_Kind range + N_Formal_Abstract_Subprogram_Declaration .. + N_Formal_Concrete_Subprogram_Declaration; + + subtype N_Generic_Declaration is Node_Kind range + N_Generic_Package_Declaration .. + N_Generic_Subprogram_Declaration; + + subtype N_Generic_Instantiation is Node_Kind range + N_Function_Instantiation .. + N_Package_Instantiation; + + subtype N_Generic_Renaming_Declaration is Node_Kind range + N_Generic_Function_Renaming_Declaration .. + N_Generic_Procedure_Renaming_Declaration; + + subtype N_Has_Chars is Node_Kind range + N_Attribute_Definition_Clause .. + N_Op_Plus; + + subtype N_Has_Entity is Node_Kind range + N_Expanded_Name .. + N_Attribute_Reference; + -- Nodes that have Entity fields + -- Warning: DOES NOT INCLUDE N_Freeze_Entity! + + subtype N_Has_Etype is Node_Kind range + N_Error .. + N_Subtype_Indication; + + subtype N_Has_Treat_Fixed_As_Integer is Node_Kind range + N_Op_Divide .. + N_Op_Rem; + + subtype N_Multiplying_Operator is Node_Kind range + N_Op_Divide .. + N_Op_Rem; + + subtype N_Later_Decl_Item is Node_Kind range + N_Task_Type_Declaration .. + N_Generic_Subprogram_Declaration; + -- Note: this is Ada 83 relevant only (see Ada 83 RM 3.9 (2)) and + -- includes only those items which can appear as later declarative + -- items. This also includes N_Implicit_Label_Declaration which is + -- not specifically in the grammar but may appear as a valid later + -- declarative items. It does NOT include N_Pragma which can also + -- appear among later declarative items. It does however include + -- N_Protected_Body, which is a bit peculiar, but harmless since + -- this cannot appear in Ada 83 mode anyway. + + subtype N_Membership_Test is Node_Kind range + N_In .. + N_Not_In; + + subtype N_Op is Node_Kind range + N_Op_Add .. + N_Op_Plus; + + subtype N_Op_Boolean is Node_Kind range + N_Op_And .. + N_Op_Xor; + -- Binary operators which take operands of a boolean type, and yield + -- a result of a boolean type. + + subtype N_Op_Compare is Node_Kind range + N_Op_Eq .. + N_Op_Ne; + + subtype N_Op_Shift is Node_Kind range + N_Op_Rotate_Left .. + N_Op_Shift_Right_Arithmetic; + + subtype N_Proper_Body is Node_Kind range + N_Package_Body .. + N_Task_Body; + + subtype N_Push_xxx_Label is Node_Kind range + N_Push_Constraint_Error_Label .. + N_Push_Storage_Error_Label; + + subtype N_Pop_xxx_Label is Node_Kind range + N_Pop_Constraint_Error_Label .. + N_Pop_Storage_Error_Label; + + subtype N_Push_Pop_xxx_Label is Node_Kind range + N_Push_Constraint_Error_Label .. + N_Pop_Storage_Error_Label; + + subtype N_Raise_xxx_Error is Node_Kind range + N_Raise_Constraint_Error .. + N_Raise_Storage_Error; + + subtype N_Renaming_Declaration is Node_Kind range + N_Exception_Renaming_Declaration .. + N_Generic_Procedure_Renaming_Declaration; + + subtype N_Representation_Clause is Node_Kind range + N_At_Clause .. + N_Attribute_Definition_Clause; + + subtype N_Statement_Other_Than_Procedure_Call is Node_Kind range + N_Abort_Statement .. + N_If_Statement; + -- Note that this includes all statement types except for the cases of the + -- N_Procedure_Call_Statement which is considered to be a subexpression + -- (since overloading is possible, so it needs to go through the normal + -- overloading resolution for expressions). + + subtype N_Subprogram_Instantiation is Node_Kind range + N_Function_Instantiation .. + N_Procedure_Instantiation; + + subtype N_Has_Condition is Node_Kind range + N_Exit_Statement .. + N_Terminate_Alternative; + -- Nodes with condition fields (does not include N_Raise_xxx_Error) + + subtype N_Subexpr is Node_Kind range + N_Expanded_Name .. + N_Unchecked_Type_Conversion; + -- Nodes with expression fields + + subtype N_Subprogram_Specification is Node_Kind range + N_Function_Specification .. + N_Procedure_Specification; + + subtype N_Unary_Op is Node_Kind range + N_Op_Abs .. + N_Op_Plus; + + subtype N_Unit_Body is Node_Kind range + N_Package_Body .. + N_Subprogram_Body; + + --------------------------- + -- Node Access Functions -- + --------------------------- + + -- The following functions return the contents of the indicated field of + -- the node referenced by the argument, which is a Node_Id. They provide + -- logical access to fields in the node which could be accessed using the + -- Atree.Unchecked_Access package, but the idea is always to use these + -- higher level routines which preserve strong typing. In debug mode, + -- these routines check that they are being applied to an appropriate + -- node, as well as checking that the node is in range. + + function ABE_Is_Certain + (N : Node_Id) return Boolean; -- Flag18 + + function Abort_Present + (N : Node_Id) return Boolean; -- Flag15 + + function Abortable_Part + (N : Node_Id) return Node_Id; -- Node2 + + function Abstract_Present + (N : Node_Id) return Boolean; -- Flag4 + + function Accept_Handler_Records + (N : Node_Id) return List_Id; -- List5 + + function Accept_Statement + (N : Node_Id) return Node_Id; -- Node2 + + function Access_Definition + (N : Node_Id) return Node_Id; -- Node3 + + function Access_To_Subprogram_Definition + (N : Node_Id) return Node_Id; -- Node3 + + function Access_Types_To_Process + (N : Node_Id) return Elist_Id; -- Elist2 + + function Actions + (N : Node_Id) return List_Id; -- List1 + + function Activation_Chain_Entity + (N : Node_Id) return Node_Id; -- Node3 + + function Acts_As_Spec + (N : Node_Id) return Boolean; -- Flag4 + + function Actual_Designated_Subtype + (N : Node_Id) return Node_Id; -- Node4 + + function Address_Warning_Posted + (N : Node_Id) return Boolean; -- Flag18 + + function Aggregate_Bounds + (N : Node_Id) return Node_Id; -- Node3 + + function Aliased_Present + (N : Node_Id) return Boolean; -- Flag4 + + function All_Others + (N : Node_Id) return Boolean; -- Flag11 + + function All_Present + (N : Node_Id) return Boolean; -- Flag15 + + function Alternatives + (N : Node_Id) return List_Id; -- List4 + + function Ancestor_Part + (N : Node_Id) return Node_Id; -- Node3 + + function Array_Aggregate + (N : Node_Id) return Node_Id; -- Node3 + + function Assignment_OK + (N : Node_Id) return Boolean; -- Flag15 + + function Associated_Node + (N : Node_Id) return Node_Id; -- Node4 + + function At_End_Proc + (N : Node_Id) return Node_Id; -- Node1 + + function Attribute_Name + (N : Node_Id) return Name_Id; -- Name2 + + function Aux_Decls_Node + (N : Node_Id) return Node_Id; -- Node5 + + function Backwards_OK + (N : Node_Id) return Boolean; -- Flag6 + + function Bad_Is_Detected + (N : Node_Id) return Boolean; -- Flag15 + + function By_Ref + (N : Node_Id) return Boolean; -- Flag5 + + function Body_Required + (N : Node_Id) return Boolean; -- Flag13 + + function Body_To_Inline + (N : Node_Id) return Node_Id; -- Node3 + + function Box_Present + (N : Node_Id) return Boolean; -- Flag15 + + function Char_Literal_Value + (N : Node_Id) return Uint; -- Uint2 + + function Chars + (N : Node_Id) return Name_Id; -- Name1 + + function Check_Address_Alignment + (N : Node_Id) return Boolean; -- Flag11 + + function Choice_Parameter + (N : Node_Id) return Node_Id; -- Node2 + + function Choices + (N : Node_Id) return List_Id; -- List1 + + function Coextensions + (N : Node_Id) return Elist_Id; -- Elist4 + + function Comes_From_Extended_Return_Statement + (N : Node_Id) return Boolean; -- Flag18 + + function Compile_Time_Known_Aggregate + (N : Node_Id) return Boolean; -- Flag18 + + function Component_Associations + (N : Node_Id) return List_Id; -- List2 + + function Component_Clauses + (N : Node_Id) return List_Id; -- List3 + + function Component_Definition + (N : Node_Id) return Node_Id; -- Node4 + + function Component_Items + (N : Node_Id) return List_Id; -- List3 + + function Component_List + (N : Node_Id) return Node_Id; -- Node1 + + function Component_Name + (N : Node_Id) return Node_Id; -- Node1 + + function Condition + (N : Node_Id) return Node_Id; -- Node1 + + function Condition_Actions + (N : Node_Id) return List_Id; -- List3 + + function Config_Pragmas + (N : Node_Id) return List_Id; -- List4 + + function Constant_Present + (N : Node_Id) return Boolean; -- Flag17 + + function Constraint + (N : Node_Id) return Node_Id; -- Node3 + + function Constraints + (N : Node_Id) return List_Id; -- List1 + + function Context_Installed + (N : Node_Id) return Boolean; -- Flag13 + + function Context_Items + (N : Node_Id) return List_Id; -- List1 + + function Controlling_Argument + (N : Node_Id) return Node_Id; -- Node1 + + function Conversion_OK + (N : Node_Id) return Boolean; -- Flag14 + + function Corresponding_Body + (N : Node_Id) return Node_Id; -- Node5 + + function Corresponding_Formal_Spec + (N : Node_Id) return Node_Id; -- Node3 + + function Corresponding_Generic_Association + (N : Node_Id) return Node_Id; -- Node5 + + function Corresponding_Integer_Value + (N : Node_Id) return Uint; -- Uint4 + + function Corresponding_Spec + (N : Node_Id) return Node_Id; -- Node5 + + function Corresponding_Stub + (N : Node_Id) return Node_Id; -- Node3 + + function Dcheck_Function + (N : Node_Id) return Entity_Id; -- Node5 + + function Debug_Statement + (N : Node_Id) return Node_Id; -- Node3 + + function Declarations + (N : Node_Id) return List_Id; -- List2 + + function Default_Expression + (N : Node_Id) return Node_Id; -- Node5 + + function Default_Name + (N : Node_Id) return Node_Id; -- Node2 + + function Defining_Identifier + (N : Node_Id) return Entity_Id; -- Node1 + + function Defining_Unit_Name + (N : Node_Id) return Node_Id; -- Node1 + + function Delay_Alternative + (N : Node_Id) return Node_Id; -- Node4 + + function Delay_Statement + (N : Node_Id) return Node_Id; -- Node2 + + function Delta_Expression + (N : Node_Id) return Node_Id; -- Node3 + + function Digits_Expression + (N : Node_Id) return Node_Id; -- Node2 + + function Discr_Check_Funcs_Built + (N : Node_Id) return Boolean; -- Flag11 + + function Discrete_Choices + (N : Node_Id) return List_Id; -- List4 + + function Discrete_Range + (N : Node_Id) return Node_Id; -- Node4 + + function Discrete_Subtype_Definition + (N : Node_Id) return Node_Id; -- Node4 + + function Discrete_Subtype_Definitions + (N : Node_Id) return List_Id; -- List2 + + function Discriminant_Specifications + (N : Node_Id) return List_Id; -- List4 + + function Discriminant_Type + (N : Node_Id) return Node_Id; -- Node5 + + function Do_Accessibility_Check + (N : Node_Id) return Boolean; -- Flag13 + + function Do_Discriminant_Check + (N : Node_Id) return Boolean; -- Flag13 + + function Do_Division_Check + (N : Node_Id) return Boolean; -- Flag13 + + function Do_Length_Check + (N : Node_Id) return Boolean; -- Flag4 + + function Do_Overflow_Check + (N : Node_Id) return Boolean; -- Flag17 + + function Do_Range_Check + (N : Node_Id) return Boolean; -- Flag9 + + function Do_Storage_Check + (N : Node_Id) return Boolean; -- Flag17 + + function Do_Tag_Check + (N : Node_Id) return Boolean; -- Flag13 + + function Elaborate_All_Desirable + (N : Node_Id) return Boolean; -- Flag9 + + function Elaborate_All_Present + (N : Node_Id) return Boolean; -- Flag14 + + function Elaborate_Desirable + (N : Node_Id) return Boolean; -- Flag11 + + function Elaborate_Present + (N : Node_Id) return Boolean; -- Flag4 + + function Elaboration_Boolean + (N : Node_Id) return Node_Id; -- Node2 + + function Else_Actions + (N : Node_Id) return List_Id; -- List3 + + function Else_Statements + (N : Node_Id) return List_Id; -- List4 + + function Elsif_Parts + (N : Node_Id) return List_Id; -- List3 + + function Enclosing_Variant + (N : Node_Id) return Node_Id; -- Node2 + + function End_Label + (N : Node_Id) return Node_Id; -- Node4 + + function End_Span + (N : Node_Id) return Uint; -- Uint5 + + function Entity + (N : Node_Id) return Node_Id; -- Node4 + + function Entity_Or_Associated_Node + (N : Node_Id) return Node_Id; -- Node4 + + function Entry_Body_Formal_Part + (N : Node_Id) return Node_Id; -- Node5 + + function Entry_Call_Alternative + (N : Node_Id) return Node_Id; -- Node1 + + function Entry_Call_Statement + (N : Node_Id) return Node_Id; -- Node1 + + function Entry_Direct_Name + (N : Node_Id) return Node_Id; -- Node1 + + function Entry_Index + (N : Node_Id) return Node_Id; -- Node5 + + function Entry_Index_Specification + (N : Node_Id) return Node_Id; -- Node4 + + function Etype + (N : Node_Id) return Node_Id; -- Node5 + + function Exception_Choices + (N : Node_Id) return List_Id; -- List4 + + function Exception_Handlers + (N : Node_Id) return List_Id; -- List5 + + function Exception_Junk + (N : Node_Id) return Boolean; -- Flag8 + + function Exception_Label + (N : Node_Id) return Node_Id; -- Node5 + + function Explicit_Actual_Parameter + (N : Node_Id) return Node_Id; -- Node3 + + function Expansion_Delayed + (N : Node_Id) return Boolean; -- Flag11 + + function Explicit_Generic_Actual_Parameter + (N : Node_Id) return Node_Id; -- Node1 + + function Expression + (N : Node_Id) return Node_Id; -- Node3 + + function Expressions + (N : Node_Id) return List_Id; -- List1 + + function First_Bit + (N : Node_Id) return Node_Id; -- Node3 + + function First_Inlined_Subprogram + (N : Node_Id) return Entity_Id; -- Node3 + + function First_Name + (N : Node_Id) return Boolean; -- Flag5 + + function First_Named_Actual + (N : Node_Id) return Node_Id; -- Node4 + + function First_Real_Statement + (N : Node_Id) return Node_Id; -- Node2 + + function First_Subtype_Link + (N : Node_Id) return Entity_Id; -- Node5 + + function Float_Truncate + (N : Node_Id) return Boolean; -- Flag11 + + function Formal_Type_Definition + (N : Node_Id) return Node_Id; -- Node3 + + function Forwards_OK + (N : Node_Id) return Boolean; -- Flag5 + + function From_At_End + (N : Node_Id) return Boolean; -- Flag4 + + function From_At_Mod + (N : Node_Id) return Boolean; -- Flag4 + + function From_Default + (N : Node_Id) return Boolean; -- Flag6 + + function Generic_Associations + (N : Node_Id) return List_Id; -- List3 + + function Generic_Formal_Declarations + (N : Node_Id) return List_Id; -- List2 + + function Generic_Parent + (N : Node_Id) return Node_Id; -- Node5 + + function Generic_Parent_Type + (N : Node_Id) return Node_Id; -- Node4 + + function Handled_Statement_Sequence + (N : Node_Id) return Node_Id; -- Node4 + + function Handler_List_Entry + (N : Node_Id) return Node_Id; -- Node2 + + function Has_Created_Identifier + (N : Node_Id) return Boolean; -- Flag15 + + function Has_Dynamic_Length_Check + (N : Node_Id) return Boolean; -- Flag10 + + function Has_Dynamic_Range_Check + (N : Node_Id) return Boolean; -- Flag12 + + function Has_Init_Expression + (N : Node_Id) return Boolean; -- Flag14 + + function Has_Local_Raise + (N : Node_Id) return Boolean; -- Flag8 + + function Has_No_Elaboration_Code + (N : Node_Id) return Boolean; -- Flag17 + + function Has_Priority_Pragma + (N : Node_Id) return Boolean; -- Flag6 + + function Has_Private_View + (N : Node_Id) return Boolean; -- Flag11 + + function Has_Relative_Deadline_Pragma + (N : Node_Id) return Boolean; -- Flag9 + + function Has_Self_Reference + (N : Node_Id) return Boolean; -- Flag13 + + function Has_Storage_Size_Pragma + (N : Node_Id) return Boolean; -- Flag5 + + function Has_Task_Info_Pragma + (N : Node_Id) return Boolean; -- Flag7 + + function Has_Task_Name_Pragma + (N : Node_Id) return Boolean; -- Flag8 + + function Has_Wide_Character + (N : Node_Id) return Boolean; -- Flag11 + + function Hidden_By_Use_Clause + (N : Node_Id) return Elist_Id; -- Elist4 + + function High_Bound + (N : Node_Id) return Node_Id; -- Node2 + + function Identifier + (N : Node_Id) return Node_Id; -- Node1 + + function Interface_List + (N : Node_Id) return List_Id; -- List2 + + function Interface_Present + (N : Node_Id) return Boolean; -- Flag16 + + function Implicit_With + (N : Node_Id) return Boolean; -- Flag16 + + function In_Present + (N : Node_Id) return Boolean; -- Flag15 + + function Includes_Infinities + (N : Node_Id) return Boolean; -- Flag11 + + function Instance_Spec + (N : Node_Id) return Node_Id; -- Node5 + + function Intval + (N : Node_Id) return Uint; -- Uint3 + + function Is_Asynchronous_Call_Block + (N : Node_Id) return Boolean; -- Flag7 + + function Is_Component_Left_Opnd + (N : Node_Id) return Boolean; -- Flag13 + + function Is_Component_Right_Opnd + (N : Node_Id) return Boolean; -- Flag14 + + function Is_Controlling_Actual + (N : Node_Id) return Boolean; -- Flag16 + + function Is_Dynamic_Coextension + (N : Node_Id) return Boolean; -- Flag18 + + function Is_Entry_Barrier_Function + (N : Node_Id) return Boolean; -- Flag8 + + function Is_Expanded_Build_In_Place_Call + (N : Node_Id) return Boolean; -- Flag11 + + function Is_Folded_In_Parser + (N : Node_Id) return Boolean; -- Flag4 + + function Is_In_Discriminant_Check + (N : Node_Id) return Boolean; -- Flag11 + + function Is_Machine_Number + (N : Node_Id) return Boolean; -- Flag11 + + function Is_Null_Loop + (N : Node_Id) return Boolean; -- Flag16 + + function Is_Overloaded + (N : Node_Id) return Boolean; -- Flag5 + + function Is_Power_Of_2_For_Shift + (N : Node_Id) return Boolean; -- Flag13 + + function Is_Protected_Subprogram_Body + (N : Node_Id) return Boolean; -- Flag7 + + function Is_Static_Coextension + (N : Node_Id) return Boolean; -- Flag14 + + function Is_Static_Expression + (N : Node_Id) return Boolean; -- Flag6 + + function Is_Subprogram_Descriptor + (N : Node_Id) return Boolean; -- Flag16 + + function Is_Task_Allocation_Block + (N : Node_Id) return Boolean; -- Flag6 + + function Is_Task_Master + (N : Node_Id) return Boolean; -- Flag5 + + function Iteration_Scheme + (N : Node_Id) return Node_Id; -- Node2 + + function Itype + (N : Node_Id) return Entity_Id; -- Node1 + + function Kill_Range_Check + (N : Node_Id) return Boolean; -- Flag11 + + function Label_Construct + (N : Node_Id) return Node_Id; -- Node2 + + function Left_Opnd + (N : Node_Id) return Node_Id; -- Node2 + + function Last_Bit + (N : Node_Id) return Node_Id; -- Node4 + + function Last_Name + (N : Node_Id) return Boolean; -- Flag6 + + function Library_Unit + (N : Node_Id) return Node_Id; -- Node4 + + function Limited_View_Installed + (N : Node_Id) return Boolean; -- Flag18 + + function Limited_Present + (N : Node_Id) return Boolean; -- Flag17 + + function Literals + (N : Node_Id) return List_Id; -- List1 + + function Local_Raise_Not_OK + (N : Node_Id) return Boolean; -- Flag7 + + function Local_Raise_Statements + (N : Node_Id) return Elist_Id; -- Elist1 + + function Loop_Actions + (N : Node_Id) return List_Id; -- List2 + + function Loop_Parameter_Specification + (N : Node_Id) return Node_Id; -- Node4 + + function Low_Bound + (N : Node_Id) return Node_Id; -- Node1 + + function Mod_Clause + (N : Node_Id) return Node_Id; -- Node2 + + function More_Ids + (N : Node_Id) return Boolean; -- Flag5 + + function Must_Be_Byte_Aligned + (N : Node_Id) return Boolean; -- Flag14 + + function Must_Not_Freeze + (N : Node_Id) return Boolean; -- Flag8 + + function Must_Not_Override + (N : Node_Id) return Boolean; -- Flag15 + + function Must_Override + (N : Node_Id) return Boolean; -- Flag14 + + function Name + (N : Node_Id) return Node_Id; -- Node2 + + function Names + (N : Node_Id) return List_Id; -- List2 + + function Next_Entity + (N : Node_Id) return Node_Id; -- Node2 + + function Next_Named_Actual + (N : Node_Id) return Node_Id; -- Node4 + + function Next_Pragma + (N : Node_Id) return Node_Id; -- Node1 + + function Next_Rep_Item + (N : Node_Id) return Node_Id; -- Node5 + + function Next_Use_Clause + (N : Node_Id) return Node_Id; -- Node3 + + function No_Ctrl_Actions + (N : Node_Id) return Boolean; -- Flag7 + + function No_Elaboration_Check + (N : Node_Id) return Boolean; -- Flag14 + + function No_Entities_Ref_In_Spec + (N : Node_Id) return Boolean; -- Flag8 + + function No_Initialization + (N : Node_Id) return Boolean; -- Flag13 + + function No_Truncation + (N : Node_Id) return Boolean; -- Flag17 + + function Null_Present + (N : Node_Id) return Boolean; -- Flag13 + + function Null_Exclusion_Present + (N : Node_Id) return Boolean; -- Flag11 + + function Null_Record_Present + (N : Node_Id) return Boolean; -- Flag17 + + function Object_Definition + (N : Node_Id) return Node_Id; -- Node4 + + function Original_Discriminant + (N : Node_Id) return Node_Id; -- Node2 + + function Original_Entity + (N : Node_Id) return Entity_Id; -- Node2 + + function Others_Discrete_Choices + (N : Node_Id) return List_Id; -- List1 + + function Out_Present + (N : Node_Id) return Boolean; -- Flag17 + + function Parameter_Associations + (N : Node_Id) return List_Id; -- List3 + + function Parameter_List_Truncated + (N : Node_Id) return Boolean; -- Flag17 + + function Parameter_Specifications + (N : Node_Id) return List_Id; -- List3 + + function Parameter_Type + (N : Node_Id) return Node_Id; -- Node2 + + function Parent_Spec + (N : Node_Id) return Node_Id; -- Node4 + + function PPC_Enabled + (N : Node_Id) return Boolean; -- Flag5 + + function Position + (N : Node_Id) return Node_Id; -- Node2 + + function Pragma_Argument_Associations + (N : Node_Id) return List_Id; -- List2 + + function Pragma_Identifier + (N : Node_Id) return Node_Id; -- Node4 + + function Pragmas_After + (N : Node_Id) return List_Id; -- List5 + + function Pragmas_Before + (N : Node_Id) return List_Id; -- List4 + + function Prefix + (N : Node_Id) return Node_Id; -- Node3 + + function Present_Expr + (N : Node_Id) return Uint; -- Uint3 + + function Prev_Ids + (N : Node_Id) return Boolean; -- Flag6 + + function Print_In_Hex + (N : Node_Id) return Boolean; -- Flag13 + + function Private_Declarations + (N : Node_Id) return List_Id; -- List3 + + function Private_Present + (N : Node_Id) return Boolean; -- Flag15 + + function Procedure_To_Call + (N : Node_Id) return Node_Id; -- Node2 + + function Proper_Body + (N : Node_Id) return Node_Id; -- Node1 + + function Protected_Definition + (N : Node_Id) return Node_Id; -- Node3 + + function Protected_Present + (N : Node_Id) return Boolean; -- Flag6 + + function Raises_Constraint_Error + (N : Node_Id) return Boolean; -- Flag7 + + function Range_Constraint + (N : Node_Id) return Node_Id; -- Node4 + + function Range_Expression + (N : Node_Id) return Node_Id; -- Node4 + + function Real_Range_Specification + (N : Node_Id) return Node_Id; -- Node4 + + function Realval + (N : Node_Id) return Ureal; -- Ureal3 + + function Reason + (N : Node_Id) return Uint; -- Uint3 + + function Record_Extension_Part + (N : Node_Id) return Node_Id; -- Node3 + + function Redundant_Use + (N : Node_Id) return Boolean; -- Flag13 + + function Renaming_Exception + (N : Node_Id) return Node_Id; -- Node2 + + function Result_Definition + (N : Node_Id) return Node_Id; -- Node4 + + function Return_Object_Declarations + (N : Node_Id) return List_Id; -- List3 + + function Return_Statement_Entity + (N : Node_Id) return Node_Id; -- Node5 + + function Reverse_Present + (N : Node_Id) return Boolean; -- Flag15 + + function Right_Opnd + (N : Node_Id) return Node_Id; -- Node3 + + function Rounded_Result + (N : Node_Id) return Boolean; -- Flag18 + + function Scope + (N : Node_Id) return Node_Id; -- Node3 + + function Select_Alternatives + (N : Node_Id) return List_Id; -- List1 + + function Selector_Name + (N : Node_Id) return Node_Id; -- Node2 + + function Selector_Names + (N : Node_Id) return List_Id; -- List1 + + function Shift_Count_OK + (N : Node_Id) return Boolean; -- Flag4 + + function Source_Type + (N : Node_Id) return Entity_Id; -- Node1 + + function Specification + (N : Node_Id) return Node_Id; -- Node1 + + function Statements + (N : Node_Id) return List_Id; -- List3 + + function Static_Processing_OK + (N : Node_Id) return Boolean; -- Flag4 + + function Storage_Pool + (N : Node_Id) return Node_Id; -- Node1 + + function Strval + (N : Node_Id) return String_Id; -- Str3 + + function Subtype_Indication + (N : Node_Id) return Node_Id; -- Node5 + + function Subtype_Mark + (N : Node_Id) return Node_Id; -- Node4 + + function Subtype_Marks + (N : Node_Id) return List_Id; -- List2 + + function Synchronized_Present + (N : Node_Id) return Boolean; -- Flag7 + + function Tagged_Present + (N : Node_Id) return Boolean; -- Flag15 + + function Target_Type + (N : Node_Id) return Entity_Id; -- Node2 + + function Task_Definition + (N : Node_Id) return Node_Id; -- Node3 + + function Task_Present + (N : Node_Id) return Boolean; -- Flag5 + + function Then_Actions + (N : Node_Id) return List_Id; -- List2 + + function Then_Statements + (N : Node_Id) return List_Id; -- List2 + + function Treat_Fixed_As_Integer + (N : Node_Id) return Boolean; -- Flag14 + + function Triggering_Alternative + (N : Node_Id) return Node_Id; -- Node1 + + function Triggering_Statement + (N : Node_Id) return Node_Id; -- Node1 + + function TSS_Elist + (N : Node_Id) return Elist_Id; -- Elist3 + + function Type_Definition + (N : Node_Id) return Node_Id; -- Node3 + + function Unit + (N : Node_Id) return Node_Id; -- Node2 + + function Unknown_Discriminants_Present + (N : Node_Id) return Boolean; -- Flag13 + + function Unreferenced_In_Spec + (N : Node_Id) return Boolean; -- Flag7 + + function Variant_Part + (N : Node_Id) return Node_Id; -- Node4 + + function Variants + (N : Node_Id) return List_Id; -- List1 + + function Visible_Declarations + (N : Node_Id) return List_Id; -- List2 + + function Was_Originally_Stub + (N : Node_Id) return Boolean; -- Flag13 + + function Zero_Cost_Handling + (N : Node_Id) return Boolean; -- Flag5 + + -- End functions (note used by xsinfo utility program to end processing) + + ---------------------------- + -- Node Update Procedures -- + ---------------------------- + + -- These are the corresponding node update routines, which again provide + -- a high level logical access with type checking. In addition to setting + -- the indicated field of the node N to the given Val, in the case of + -- tree pointers (List1-4), the parent pointer of the Val node is set to + -- point back to node N. This automates the setting of the parent pointer. + + procedure Set_ABE_Is_Certain + (N : Node_Id; Val : Boolean := True); -- Flag18 + + procedure Set_Abort_Present + (N : Node_Id; Val : Boolean := True); -- Flag15 + + procedure Set_Abortable_Part + (N : Node_Id; Val : Node_Id); -- Node2 + + procedure Set_Abstract_Present + (N : Node_Id; Val : Boolean := True); -- Flag4 + + procedure Set_Accept_Handler_Records + (N : Node_Id; Val : List_Id); -- List5 + + procedure Set_Accept_Statement + (N : Node_Id; Val : Node_Id); -- Node2 + + procedure Set_Access_Definition + (N : Node_Id; Val : Node_Id); -- Node3 + + procedure Set_Access_To_Subprogram_Definition + (N : Node_Id; Val : Node_Id); -- Node3 + + procedure Set_Access_Types_To_Process + (N : Node_Id; Val : Elist_Id); -- Elist2 + + procedure Set_Actions + (N : Node_Id; Val : List_Id); -- List1 + + procedure Set_Activation_Chain_Entity + (N : Node_Id; Val : Node_Id); -- Node3 + + procedure Set_Acts_As_Spec + (N : Node_Id; Val : Boolean := True); -- Flag4 + + procedure Set_Actual_Designated_Subtype + (N : Node_Id; Val : Node_Id); -- Node4 + + procedure Set_Address_Warning_Posted + (N : Node_Id; Val : Boolean := True); -- Flag18 + + procedure Set_Aggregate_Bounds + (N : Node_Id; Val : Node_Id); -- Node3 + + procedure Set_Aliased_Present + (N : Node_Id; Val : Boolean := True); -- Flag4 + + procedure Set_All_Others + (N : Node_Id; Val : Boolean := True); -- Flag11 + + procedure Set_All_Present + (N : Node_Id; Val : Boolean := True); -- Flag15 + + procedure Set_Alternatives + (N : Node_Id; Val : List_Id); -- List4 + + procedure Set_Ancestor_Part + (N : Node_Id; Val : Node_Id); -- Node3 + + procedure Set_Array_Aggregate + (N : Node_Id; Val : Node_Id); -- Node3 + + procedure Set_Assignment_OK + (N : Node_Id; Val : Boolean := True); -- Flag15 + + procedure Set_Associated_Node + (N : Node_Id; Val : Node_Id); -- Node4 + + procedure Set_Attribute_Name + (N : Node_Id; Val : Name_Id); -- Name2 + + procedure Set_At_End_Proc + (N : Node_Id; Val : Node_Id); -- Node1 + + procedure Set_Aux_Decls_Node + (N : Node_Id; Val : Node_Id); -- Node5 + + procedure Set_Backwards_OK + (N : Node_Id; Val : Boolean := True); -- Flag6 + + procedure Set_Bad_Is_Detected + (N : Node_Id; Val : Boolean := True); -- Flag15 + + procedure Set_Body_Required + (N : Node_Id; Val : Boolean := True); -- Flag13 + + procedure Set_Body_To_Inline + (N : Node_Id; Val : Node_Id); -- Node3 + + procedure Set_Box_Present + (N : Node_Id; Val : Boolean := True); -- Flag15 + + procedure Set_By_Ref + (N : Node_Id; Val : Boolean := True); -- Flag5 + + procedure Set_Char_Literal_Value + (N : Node_Id; Val : Uint); -- Uint2 + + procedure Set_Chars + (N : Node_Id; Val : Name_Id); -- Name1 + + procedure Set_Check_Address_Alignment + (N : Node_Id; Val : Boolean := True); -- Flag11 + + procedure Set_Choice_Parameter + (N : Node_Id; Val : Node_Id); -- Node2 + + procedure Set_Coextensions + (N : Node_Id; Val : Elist_Id); -- Elist4 + + procedure Set_Choices + (N : Node_Id; Val : List_Id); -- List1 + + procedure Set_Comes_From_Extended_Return_Statement + (N : Node_Id; Val : Boolean := True); -- Flag18 + + procedure Set_Compile_Time_Known_Aggregate + (N : Node_Id; Val : Boolean := True); -- Flag18 + + procedure Set_Component_Associations + (N : Node_Id; Val : List_Id); -- List2 + + procedure Set_Component_Clauses + (N : Node_Id; Val : List_Id); -- List3 + + procedure Set_Component_Definition + (N : Node_Id; Val : Node_Id); -- Node4 + + procedure Set_Component_Items + (N : Node_Id; Val : List_Id); -- List3 + + procedure Set_Component_List + (N : Node_Id; Val : Node_Id); -- Node1 + + procedure Set_Component_Name + (N : Node_Id; Val : Node_Id); -- Node1 + + procedure Set_Condition + (N : Node_Id; Val : Node_Id); -- Node1 + + procedure Set_Condition_Actions + (N : Node_Id; Val : List_Id); -- List3 + + procedure Set_Config_Pragmas + (N : Node_Id; Val : List_Id); -- List4 + + procedure Set_Constant_Present + (N : Node_Id; Val : Boolean := True); -- Flag17 + + procedure Set_Constraint + (N : Node_Id; Val : Node_Id); -- Node3 + + procedure Set_Constraints + (N : Node_Id; Val : List_Id); -- List1 + + procedure Set_Context_Installed + (N : Node_Id; Val : Boolean := True); -- Flag13 + + procedure Set_Context_Items + (N : Node_Id; Val : List_Id); -- List1 + + procedure Set_Controlling_Argument + (N : Node_Id; Val : Node_Id); -- Node1 + + procedure Set_Conversion_OK + (N : Node_Id; Val : Boolean := True); -- Flag14 + + procedure Set_Corresponding_Body + (N : Node_Id; Val : Node_Id); -- Node5 + + procedure Set_Corresponding_Formal_Spec + (N : Node_Id; Val : Node_Id); -- Node3 + + procedure Set_Corresponding_Generic_Association + (N : Node_Id; Val : Node_Id); -- Node5 + + procedure Set_Corresponding_Integer_Value + (N : Node_Id; Val : Uint); -- Uint4 + + procedure Set_Corresponding_Spec + (N : Node_Id; Val : Node_Id); -- Node5 + + procedure Set_Corresponding_Stub + (N : Node_Id; Val : Node_Id); -- Node3 + + procedure Set_Dcheck_Function + (N : Node_Id; Val : Entity_Id); -- Node5 + + procedure Set_Debug_Statement + (N : Node_Id; Val : Node_Id); -- Node3 + + procedure Set_Declarations + (N : Node_Id; Val : List_Id); -- List2 + + procedure Set_Default_Expression + (N : Node_Id; Val : Node_Id); -- Node5 + + procedure Set_Default_Name + (N : Node_Id; Val : Node_Id); -- Node2 + + procedure Set_Defining_Identifier + (N : Node_Id; Val : Entity_Id); -- Node1 + + procedure Set_Defining_Unit_Name + (N : Node_Id; Val : Node_Id); -- Node1 + + procedure Set_Delay_Alternative + (N : Node_Id; Val : Node_Id); -- Node4 + + procedure Set_Delay_Statement + (N : Node_Id; Val : Node_Id); -- Node2 + + procedure Set_Delta_Expression + (N : Node_Id; Val : Node_Id); -- Node3 + + procedure Set_Digits_Expression + (N : Node_Id; Val : Node_Id); -- Node2 + + procedure Set_Discr_Check_Funcs_Built + (N : Node_Id; Val : Boolean := True); -- Flag11 + + procedure Set_Discrete_Choices + (N : Node_Id; Val : List_Id); -- List4 + + procedure Set_Discrete_Range + (N : Node_Id; Val : Node_Id); -- Node4 + + procedure Set_Discrete_Subtype_Definition + (N : Node_Id; Val : Node_Id); -- Node4 + + procedure Set_Discrete_Subtype_Definitions + (N : Node_Id; Val : List_Id); -- List2 + + procedure Set_Discriminant_Specifications + (N : Node_Id; Val : List_Id); -- List4 + + procedure Set_Discriminant_Type + (N : Node_Id; Val : Node_Id); -- Node5 + + procedure Set_Do_Accessibility_Check + (N : Node_Id; Val : Boolean := True); -- Flag13 + + procedure Set_Do_Discriminant_Check + (N : Node_Id; Val : Boolean := True); -- Flag13 + + procedure Set_Do_Division_Check + (N : Node_Id; Val : Boolean := True); -- Flag13 + + procedure Set_Do_Length_Check + (N : Node_Id; Val : Boolean := True); -- Flag4 + + procedure Set_Do_Overflow_Check + (N : Node_Id; Val : Boolean := True); -- Flag17 + + procedure Set_Do_Range_Check + (N : Node_Id; Val : Boolean := True); -- Flag9 + + procedure Set_Do_Storage_Check + (N : Node_Id; Val : Boolean := True); -- Flag17 + + procedure Set_Do_Tag_Check + (N : Node_Id; Val : Boolean := True); -- Flag13 + + procedure Set_Elaborate_All_Desirable + (N : Node_Id; Val : Boolean := True); -- Flag9 + + procedure Set_Elaborate_All_Present + (N : Node_Id; Val : Boolean := True); -- Flag14 + + procedure Set_Elaborate_Desirable + (N : Node_Id; Val : Boolean := True); -- Flag11 + + procedure Set_Elaborate_Present + (N : Node_Id; Val : Boolean := True); -- Flag4 + + procedure Set_Elaboration_Boolean + (N : Node_Id; Val : Node_Id); -- Node2 + + procedure Set_Else_Actions + (N : Node_Id; Val : List_Id); -- List3 + + procedure Set_Else_Statements + (N : Node_Id; Val : List_Id); -- List4 + + procedure Set_Elsif_Parts + (N : Node_Id; Val : List_Id); -- List3 + + procedure Set_Enclosing_Variant + (N : Node_Id; Val : Node_Id); -- Node2 + + procedure Set_End_Label + (N : Node_Id; Val : Node_Id); -- Node4 + + procedure Set_End_Span + (N : Node_Id; Val : Uint); -- Uint5 + + procedure Set_Entity + (N : Node_Id; Val : Node_Id); -- Node4 + + procedure Set_Entry_Body_Formal_Part + (N : Node_Id; Val : Node_Id); -- Node5 + + procedure Set_Entry_Call_Alternative + (N : Node_Id; Val : Node_Id); -- Node1 + + procedure Set_Entry_Call_Statement + (N : Node_Id; Val : Node_Id); -- Node1 + + procedure Set_Entry_Direct_Name + (N : Node_Id; Val : Node_Id); -- Node1 + + procedure Set_Entry_Index + (N : Node_Id; Val : Node_Id); -- Node5 + + procedure Set_Entry_Index_Specification + (N : Node_Id; Val : Node_Id); -- Node4 + + procedure Set_Etype + (N : Node_Id; Val : Node_Id); -- Node5 + + procedure Set_Exception_Choices + (N : Node_Id; Val : List_Id); -- List4 + + procedure Set_Exception_Handlers + (N : Node_Id; Val : List_Id); -- List5 + + procedure Set_Exception_Junk + (N : Node_Id; Val : Boolean := True); -- Flag8 + + procedure Set_Exception_Label + (N : Node_Id; Val : Node_Id); -- Node5 + + procedure Set_Expansion_Delayed + (N : Node_Id; Val : Boolean := True); -- Flag11 + + procedure Set_Explicit_Actual_Parameter + (N : Node_Id; Val : Node_Id); -- Node3 + + procedure Set_Explicit_Generic_Actual_Parameter + (N : Node_Id; Val : Node_Id); -- Node1 + + procedure Set_Expression + (N : Node_Id; Val : Node_Id); -- Node3 + + procedure Set_Expressions + (N : Node_Id; Val : List_Id); -- List1 + + procedure Set_First_Bit + (N : Node_Id; Val : Node_Id); -- Node3 + + procedure Set_First_Inlined_Subprogram + (N : Node_Id; Val : Entity_Id); -- Node3 + + procedure Set_First_Name + (N : Node_Id; Val : Boolean := True); -- Flag5 + + procedure Set_First_Named_Actual + (N : Node_Id; Val : Node_Id); -- Node4 + + procedure Set_First_Real_Statement + (N : Node_Id; Val : Node_Id); -- Node2 + + procedure Set_First_Subtype_Link + (N : Node_Id; Val : Entity_Id); -- Node5 + + procedure Set_Float_Truncate + (N : Node_Id; Val : Boolean := True); -- Flag11 + + procedure Set_Formal_Type_Definition + (N : Node_Id; Val : Node_Id); -- Node3 + + procedure Set_Forwards_OK + (N : Node_Id; Val : Boolean := True); -- Flag5 + + procedure Set_From_At_Mod + (N : Node_Id; Val : Boolean := True); -- Flag4 + + procedure Set_From_At_End + (N : Node_Id; Val : Boolean := True); -- Flag4 + + procedure Set_From_Default + (N : Node_Id; Val : Boolean := True); -- Flag6 + + procedure Set_Generic_Associations + (N : Node_Id; Val : List_Id); -- List3 + + procedure Set_Generic_Formal_Declarations + (N : Node_Id; Val : List_Id); -- List2 + + procedure Set_Generic_Parent + (N : Node_Id; Val : Node_Id); -- Node5 + + procedure Set_Generic_Parent_Type + (N : Node_Id; Val : Node_Id); -- Node4 + + procedure Set_Handled_Statement_Sequence + (N : Node_Id; Val : Node_Id); -- Node4 + + procedure Set_Handler_List_Entry + (N : Node_Id; Val : Node_Id); -- Node2 + + procedure Set_Has_Created_Identifier + (N : Node_Id; Val : Boolean := True); -- Flag15 + + procedure Set_Has_Dynamic_Length_Check + (N : Node_Id; Val : Boolean := True); -- Flag10 + + procedure Set_Has_Dynamic_Range_Check + (N : Node_Id; Val : Boolean := True); -- Flag12 + + procedure Set_Has_Init_Expression + (N : Node_Id; Val : Boolean := True); -- Flag14 + + procedure Set_Has_Local_Raise + (N : Node_Id; Val : Boolean := True); -- Flag8 + + procedure Set_Has_No_Elaboration_Code + (N : Node_Id; Val : Boolean := True); -- Flag17 + + procedure Set_Has_Priority_Pragma + (N : Node_Id; Val : Boolean := True); -- Flag6 + + procedure Set_Has_Private_View + (N : Node_Id; Val : Boolean := True); -- Flag11 + + procedure Set_Has_Relative_Deadline_Pragma + (N : Node_Id; Val : Boolean := True); -- Flag9 + + procedure Set_Has_Self_Reference + (N : Node_Id; Val : Boolean := True); -- Flag13 + + procedure Set_Has_Storage_Size_Pragma + (N : Node_Id; Val : Boolean := True); -- Flag5 + + procedure Set_Has_Task_Info_Pragma + (N : Node_Id; Val : Boolean := True); -- Flag7 + + procedure Set_Has_Task_Name_Pragma + (N : Node_Id; Val : Boolean := True); -- Flag8 + + procedure Set_Has_Wide_Character + (N : Node_Id; Val : Boolean := True); -- Flag11 + + procedure Set_Hidden_By_Use_Clause + (N : Node_Id; Val : Elist_Id); -- Elist4 + + procedure Set_High_Bound + (N : Node_Id; Val : Node_Id); -- Node2 + + procedure Set_Identifier + (N : Node_Id; Val : Node_Id); -- Node1 + + procedure Set_Interface_List + (N : Node_Id; Val : List_Id); -- List2 + + procedure Set_Interface_Present + (N : Node_Id; Val : Boolean := True); -- Flag16 + + procedure Set_Implicit_With + (N : Node_Id; Val : Boolean := True); -- Flag16 + + procedure Set_In_Present + (N : Node_Id; Val : Boolean := True); -- Flag15 + + procedure Set_Includes_Infinities + (N : Node_Id; Val : Boolean := True); -- Flag11 + + procedure Set_Instance_Spec + (N : Node_Id; Val : Node_Id); -- Node5 + + procedure Set_Intval + (N : Node_Id; Val : Uint); -- Uint3 + + procedure Set_Is_Asynchronous_Call_Block + (N : Node_Id; Val : Boolean := True); -- Flag7 + + procedure Set_Is_Component_Left_Opnd + (N : Node_Id; Val : Boolean := True); -- Flag13 + + procedure Set_Is_Component_Right_Opnd + (N : Node_Id; Val : Boolean := True); -- Flag14 + + procedure Set_Is_Controlling_Actual + (N : Node_Id; Val : Boolean := True); -- Flag16 + + procedure Set_Is_Dynamic_Coextension + (N : Node_Id; Val : Boolean := True); -- Flag18 + + procedure Set_Is_Entry_Barrier_Function + (N : Node_Id; Val : Boolean := True); -- Flag8 + + procedure Set_Is_Expanded_Build_In_Place_Call + (N : Node_Id; Val : Boolean := True); -- Flag11 + + procedure Set_Is_Folded_In_Parser + (N : Node_Id; Val : Boolean := True); -- Flag4 + + procedure Set_Is_In_Discriminant_Check + (N : Node_Id; Val : Boolean := True); -- Flag11 + + procedure Set_Is_Machine_Number + (N : Node_Id; Val : Boolean := True); -- Flag11 + + procedure Set_Is_Null_Loop + (N : Node_Id; Val : Boolean := True); -- Flag16 + + procedure Set_Is_Overloaded + (N : Node_Id; Val : Boolean := True); -- Flag5 + + procedure Set_Is_Power_Of_2_For_Shift + (N : Node_Id; Val : Boolean := True); -- Flag13 + + procedure Set_Is_Protected_Subprogram_Body + (N : Node_Id; Val : Boolean := True); -- Flag7 + + procedure Set_Is_Static_Coextension + (N : Node_Id; Val : Boolean := True); -- Flag14 + + procedure Set_Is_Static_Expression + (N : Node_Id; Val : Boolean := True); -- Flag6 + + procedure Set_Is_Subprogram_Descriptor + (N : Node_Id; Val : Boolean := True); -- Flag16 + + procedure Set_Is_Task_Allocation_Block + (N : Node_Id; Val : Boolean := True); -- Flag6 + + procedure Set_Is_Task_Master + (N : Node_Id; Val : Boolean := True); -- Flag5 + + procedure Set_Iteration_Scheme + (N : Node_Id; Val : Node_Id); -- Node2 + + procedure Set_Itype + (N : Node_Id; Val : Entity_Id); -- Node1 + + procedure Set_Kill_Range_Check + (N : Node_Id; Val : Boolean := True); -- Flag11 + + procedure Set_Last_Bit + (N : Node_Id; Val : Node_Id); -- Node4 + + procedure Set_Last_Name + (N : Node_Id; Val : Boolean := True); -- Flag6 + + procedure Set_Library_Unit + (N : Node_Id; Val : Node_Id); -- Node4 + + procedure Set_Label_Construct + (N : Node_Id; Val : Node_Id); -- Node2 + + procedure Set_Left_Opnd + (N : Node_Id; Val : Node_Id); -- Node2 + + procedure Set_Limited_View_Installed + (N : Node_Id; Val : Boolean := True); -- Flag18 + + procedure Set_Limited_Present + (N : Node_Id; Val : Boolean := True); -- Flag17 + + procedure Set_Literals + (N : Node_Id; Val : List_Id); -- List1 + + procedure Set_Local_Raise_Not_OK + (N : Node_Id; Val : Boolean := True); -- Flag7 + + procedure Set_Local_Raise_Statements + (N : Node_Id; Val : Elist_Id); -- Elist1 + + procedure Set_Loop_Actions + (N : Node_Id; Val : List_Id); -- List2 + + procedure Set_Loop_Parameter_Specification + (N : Node_Id; Val : Node_Id); -- Node4 + + procedure Set_Low_Bound + (N : Node_Id; Val : Node_Id); -- Node1 + + procedure Set_Mod_Clause + (N : Node_Id; Val : Node_Id); -- Node2 + + procedure Set_More_Ids + (N : Node_Id; Val : Boolean := True); -- Flag5 + + procedure Set_Must_Be_Byte_Aligned + (N : Node_Id; Val : Boolean := True); -- Flag14 + + procedure Set_Must_Not_Freeze + (N : Node_Id; Val : Boolean := True); -- Flag8 + + procedure Set_Must_Not_Override + (N : Node_Id; Val : Boolean := True); -- Flag15 + + procedure Set_Must_Override + (N : Node_Id; Val : Boolean := True); -- Flag14 + + procedure Set_Name + (N : Node_Id; Val : Node_Id); -- Node2 + + procedure Set_Names + (N : Node_Id; Val : List_Id); -- List2 + + procedure Set_Next_Entity + (N : Node_Id; Val : Node_Id); -- Node2 + + procedure Set_Next_Named_Actual + (N : Node_Id; Val : Node_Id); -- Node4 + + procedure Set_Next_Pragma + (N : Node_Id; Val : Node_Id); -- Node1 + + procedure Set_Next_Rep_Item + (N : Node_Id; Val : Node_Id); -- Node5 + + procedure Set_Next_Use_Clause + (N : Node_Id; Val : Node_Id); -- Node3 + + procedure Set_No_Ctrl_Actions + (N : Node_Id; Val : Boolean := True); -- Flag7 + + procedure Set_No_Elaboration_Check + (N : Node_Id; Val : Boolean := True); -- Flag14 + + procedure Set_No_Entities_Ref_In_Spec + (N : Node_Id; Val : Boolean := True); -- Flag8 + + procedure Set_No_Initialization + (N : Node_Id; Val : Boolean := True); -- Flag13 + + procedure Set_No_Truncation + (N : Node_Id; Val : Boolean := True); -- Flag17 + + procedure Set_Null_Present + (N : Node_Id; Val : Boolean := True); -- Flag13 + + procedure Set_Null_Exclusion_Present + (N : Node_Id; Val : Boolean := True); -- Flag11 + + procedure Set_Null_Record_Present + (N : Node_Id; Val : Boolean := True); -- Flag17 + + procedure Set_Object_Definition + (N : Node_Id; Val : Node_Id); -- Node4 + + procedure Set_Original_Discriminant + (N : Node_Id; Val : Node_Id); -- Node2 + + procedure Set_Original_Entity + (N : Node_Id; Val : Entity_Id); -- Node2 + + procedure Set_Others_Discrete_Choices + (N : Node_Id; Val : List_Id); -- List1 + + procedure Set_Out_Present + (N : Node_Id; Val : Boolean := True); -- Flag17 + + procedure Set_Parameter_Associations + (N : Node_Id; Val : List_Id); -- List3 + + procedure Set_Parameter_List_Truncated + (N : Node_Id; Val : Boolean := True); -- Flag17 + + procedure Set_Parameter_Specifications + (N : Node_Id; Val : List_Id); -- List3 + + procedure Set_Parameter_Type + (N : Node_Id; Val : Node_Id); -- Node2 + + procedure Set_Parent_Spec + (N : Node_Id; Val : Node_Id); -- Node4 + + procedure Set_PPC_Enabled + (N : Node_Id; Val : Boolean := True); -- Flag5 + + procedure Set_Position + (N : Node_Id; Val : Node_Id); -- Node2 + + procedure Set_Pragma_Argument_Associations + (N : Node_Id; Val : List_Id); -- List2 + + procedure Set_Pragma_Identifier + (N : Node_Id; Val : Node_Id); -- Node4 + + procedure Set_Pragmas_After + (N : Node_Id; Val : List_Id); -- List5 + + procedure Set_Pragmas_Before + (N : Node_Id; Val : List_Id); -- List4 + + procedure Set_Prefix + (N : Node_Id; Val : Node_Id); -- Node3 + + procedure Set_Present_Expr + (N : Node_Id; Val : Uint); -- Uint3 + + procedure Set_Prev_Ids + (N : Node_Id; Val : Boolean := True); -- Flag6 + + procedure Set_Print_In_Hex + (N : Node_Id; Val : Boolean := True); -- Flag13 + + procedure Set_Private_Declarations + (N : Node_Id; Val : List_Id); -- List3 + + procedure Set_Private_Present + (N : Node_Id; Val : Boolean := True); -- Flag15 + + procedure Set_Procedure_To_Call + (N : Node_Id; Val : Node_Id); -- Node2 + + procedure Set_Proper_Body + (N : Node_Id; Val : Node_Id); -- Node1 + + procedure Set_Protected_Definition + (N : Node_Id; Val : Node_Id); -- Node3 + + procedure Set_Protected_Present + (N : Node_Id; Val : Boolean := True); -- Flag6 + + procedure Set_Raises_Constraint_Error + (N : Node_Id; Val : Boolean := True); -- Flag7 + + procedure Set_Range_Constraint + (N : Node_Id; Val : Node_Id); -- Node4 + + procedure Set_Range_Expression + (N : Node_Id; Val : Node_Id); -- Node4 + + procedure Set_Real_Range_Specification + (N : Node_Id; Val : Node_Id); -- Node4 + + procedure Set_Realval + (N : Node_Id; Val : Ureal); -- Ureal3 + + procedure Set_Reason + (N : Node_Id; Val : Uint); -- Uint3 + + procedure Set_Record_Extension_Part + (N : Node_Id; Val : Node_Id); -- Node3 + + procedure Set_Redundant_Use + (N : Node_Id; Val : Boolean := True); -- Flag13 + + procedure Set_Renaming_Exception + (N : Node_Id; Val : Node_Id); -- Node2 + + procedure Set_Result_Definition + (N : Node_Id; Val : Node_Id); -- Node4 + + procedure Set_Return_Object_Declarations + (N : Node_Id; Val : List_Id); -- List3 + + procedure Set_Return_Statement_Entity + (N : Node_Id; Val : Node_Id); -- Node5 + + procedure Set_Reverse_Present + (N : Node_Id; Val : Boolean := True); -- Flag15 + + procedure Set_Right_Opnd + (N : Node_Id; Val : Node_Id); -- Node3 + + procedure Set_Rounded_Result + (N : Node_Id; Val : Boolean := True); -- Flag18 + + procedure Set_Scope + (N : Node_Id; Val : Node_Id); -- Node3 + + procedure Set_Select_Alternatives + (N : Node_Id; Val : List_Id); -- List1 + + procedure Set_Selector_Name + (N : Node_Id; Val : Node_Id); -- Node2 + + procedure Set_Selector_Names + (N : Node_Id; Val : List_Id); -- List1 + + procedure Set_Shift_Count_OK + (N : Node_Id; Val : Boolean := True); -- Flag4 + + procedure Set_Source_Type + (N : Node_Id; Val : Entity_Id); -- Node1 + + procedure Set_Specification + (N : Node_Id; Val : Node_Id); -- Node1 + + procedure Set_Statements + (N : Node_Id; Val : List_Id); -- List3 + + procedure Set_Static_Processing_OK + (N : Node_Id; Val : Boolean); -- Flag4 + + procedure Set_Storage_Pool + (N : Node_Id; Val : Node_Id); -- Node1 + + procedure Set_Strval + (N : Node_Id; Val : String_Id); -- Str3 + + procedure Set_Subtype_Indication + (N : Node_Id; Val : Node_Id); -- Node5 + + procedure Set_Subtype_Mark + (N : Node_Id; Val : Node_Id); -- Node4 + + procedure Set_Subtype_Marks + (N : Node_Id; Val : List_Id); -- List2 + + procedure Set_Synchronized_Present + (N : Node_Id; Val : Boolean := True); -- Flag7 + + procedure Set_Tagged_Present + (N : Node_Id; Val : Boolean := True); -- Flag15 + + procedure Set_Target_Type + (N : Node_Id; Val : Entity_Id); -- Node2 + + procedure Set_Task_Definition + (N : Node_Id; Val : Node_Id); -- Node3 + + procedure Set_Task_Present + (N : Node_Id; Val : Boolean := True); -- Flag5 + + procedure Set_Then_Actions + (N : Node_Id; Val : List_Id); -- List2 + + procedure Set_Then_Statements + (N : Node_Id; Val : List_Id); -- List2 + + procedure Set_Treat_Fixed_As_Integer + (N : Node_Id; Val : Boolean := True); -- Flag14 + + procedure Set_Triggering_Alternative + (N : Node_Id; Val : Node_Id); -- Node1 + + procedure Set_Triggering_Statement + (N : Node_Id; Val : Node_Id); -- Node1 + + procedure Set_TSS_Elist + (N : Node_Id; Val : Elist_Id); -- Elist3 + + procedure Set_Type_Definition + (N : Node_Id; Val : Node_Id); -- Node3 + + procedure Set_Unit + (N : Node_Id; Val : Node_Id); -- Node2 + + procedure Set_Unknown_Discriminants_Present + (N : Node_Id; Val : Boolean := True); -- Flag13 + + procedure Set_Unreferenced_In_Spec + (N : Node_Id; Val : Boolean := True); -- Flag7 + + procedure Set_Variant_Part + (N : Node_Id; Val : Node_Id); -- Node4 + + procedure Set_Variants + (N : Node_Id; Val : List_Id); -- List1 + + procedure Set_Visible_Declarations + (N : Node_Id; Val : List_Id); -- List2 + + procedure Set_Was_Originally_Stub + (N : Node_Id; Val : Boolean := True); -- Flag13 + + procedure Set_Zero_Cost_Handling + (N : Node_Id; Val : Boolean := True); -- Flag5 + + ------------------------- + -- Iterator Procedures -- + ------------------------- + + -- The call to Next_xxx (N) is equivalent to N := Next_xxx (N) + + procedure Next_Entity (N : in out Node_Id); + procedure Next_Named_Actual (N : in out Node_Id); + procedure Next_Rep_Item (N : in out Node_Id); + procedure Next_Use_Clause (N : in out Node_Id); + + -------------------------------------- + -- Logical Access to End_Span Field -- + -------------------------------------- + + function End_Location (N : Node_Id) return Source_Ptr; + -- N is an N_If_Statement or N_Case_Statement node, and this + -- function returns the location of the IF token in the END IF + -- sequence by translating the value of the End_Span field. + + procedure Set_End_Location (N : Node_Id; S : Source_Ptr); + -- N is an N_If_Statement or N_Case_Statement node. This procedure + -- sets the End_Span field to correspond to the given value S. In + -- other words, End_Span is set to the difference between S and + -- Sloc (N), the starting location. + + -------------------------------- + -- Node_Kind Membership Tests -- + -------------------------------- + + -- The following functions allow a convenient notation for testing whether + -- a Node_Kind value matches any one of a list of possible values. In each + -- case True is returned if the given T argument is equal to any of the V + -- arguments. Note that there is a similar set of functions defined in + -- Atree where the first argument is a Node_Id whose Nkind field is tested. + + function Nkind_In + (T : Node_Kind; + V1 : Node_Kind; + V2 : Node_Kind) return Boolean; + + function Nkind_In + (T : Node_Kind; + V1 : Node_Kind; + V2 : Node_Kind; + V3 : Node_Kind) return Boolean; + + function Nkind_In + (T : Node_Kind; + V1 : Node_Kind; + V2 : Node_Kind; + V3 : Node_Kind; + V4 : Node_Kind) return Boolean; + + function Nkind_In + (T : Node_Kind; + V1 : Node_Kind; + V2 : Node_Kind; + V3 : Node_Kind; + V4 : Node_Kind; + V5 : Node_Kind) return Boolean; + + function Nkind_In + (T : Node_Kind; + V1 : Node_Kind; + V2 : Node_Kind; + V3 : Node_Kind; + V4 : Node_Kind; + V5 : Node_Kind; + V6 : Node_Kind) return Boolean; + + function Nkind_In + (T : Node_Kind; + V1 : Node_Kind; + V2 : Node_Kind; + V3 : Node_Kind; + V4 : Node_Kind; + V5 : Node_Kind; + V6 : Node_Kind; + V7 : Node_Kind) return Boolean; + + function Nkind_In + (T : Node_Kind; + V1 : Node_Kind; + V2 : Node_Kind; + V3 : Node_Kind; + V4 : Node_Kind; + V5 : Node_Kind; + V6 : Node_Kind; + V7 : Node_Kind; + V8 : Node_Kind) return Boolean; + + pragma Inline (Nkind_In); + -- Inline all above functions + + ----------------------- + -- Utility Functions -- + ----------------------- + + function Pragma_Name (N : Node_Id) return Name_Id; + pragma Inline (Pragma_Name); + -- Convenient function to obtain Chars field of Pragma_Identifier + + ----------------------------- + -- Syntactic Parent Tables -- + ----------------------------- + + -- These tables show for each node, and for each of the five fields, + -- whether the corresponding field is syntactic (True) or semantic (False). + -- Unused entries are also set to False. + + subtype Field_Num is Natural range 1 .. 5; + + Is_Syntactic_Field : constant array (Node_Kind, Field_Num) of Boolean := ( + + -- Following entries can be built automatically from the sinfo sources + -- using the makeisf utility (currently this program is in spitbol). + + N_Identifier => + (1 => True, -- Chars (Name1) + 2 => False, -- Original_Discriminant (Node2-Sem) + 3 => False, -- unused + 4 => False, -- Entity (Node4-Sem) + 5 => False), -- Etype (Node5-Sem) + + N_Integer_Literal => + (1 => False, -- unused + 2 => False, -- Original_Entity (Node2-Sem) + 3 => True, -- Intval (Uint3) + 4 => False, -- unused + 5 => False), -- Etype (Node5-Sem) + + N_Real_Literal => + (1 => False, -- unused + 2 => False, -- Original_Entity (Node2-Sem) + 3 => True, -- Realval (Ureal3) + 4 => False, -- Corresponding_Integer_Value (Uint4-Sem) + 5 => False), -- Etype (Node5-Sem) + + N_Character_Literal => + (1 => True, -- Chars (Name1) + 2 => True, -- Char_Literal_Value (Uint2) + 3 => False, -- unused + 4 => False, -- Entity (Node4-Sem) + 5 => False), -- Etype (Node5-Sem) + + N_String_Literal => + (1 => False, -- unused + 2 => False, -- unused + 3 => True, -- Strval (Str3) + 4 => False, -- unused + 5 => False), -- Etype (Node5-Sem) + + N_Pragma => + (1 => False, -- Next_Pragma (Node1-Sem) + 2 => True, -- Pragma_Argument_Associations (List2) + 3 => True, -- Debug_Statement (Node3) + 4 => True, -- Pragma_Identifier (Node4) + 5 => False), -- Next_Rep_Item (Node5-Sem) + + N_Pragma_Argument_Association => + (1 => True, -- Chars (Name1) + 2 => False, -- unused + 3 => True, -- Expression (Node3) + 4 => False, -- unused + 5 => False), -- unused + + N_Defining_Identifier => + (1 => True, -- Chars (Name1) + 2 => False, -- Next_Entity (Node2-Sem) + 3 => False, -- Scope (Node3-Sem) + 4 => False, -- unused + 5 => False), -- Etype (Node5-Sem) + + N_Full_Type_Declaration => + (1 => True, -- Defining_Identifier (Node1) + 2 => False, -- unused + 3 => True, -- Type_Definition (Node3) + 4 => True, -- Discriminant_Specifications (List4) + 5 => False), -- unused + + N_Subtype_Declaration => + (1 => True, -- Defining_Identifier (Node1) + 2 => False, -- unused + 3 => False, -- unused + 4 => False, -- Generic_Parent_Type (Node4-Sem) + 5 => True), -- Subtype_Indication (Node5) + + N_Subtype_Indication => + (1 => False, -- unused + 2 => False, -- unused + 3 => True, -- Constraint (Node3) + 4 => True, -- Subtype_Mark (Node4) + 5 => False), -- Etype (Node5-Sem) + + N_Object_Declaration => + (1 => True, -- Defining_Identifier (Node1) + 2 => False, -- Handler_List_Entry (Node2-Sem) + 3 => True, -- Expression (Node3) + 4 => True, -- Object_Definition (Node4) + 5 => False), -- Corresponding_Generic_Association (Node5-Sem) + + N_Number_Declaration => + (1 => True, -- Defining_Identifier (Node1) + 2 => False, -- unused + 3 => True, -- Expression (Node3) + 4 => False, -- unused + 5 => False), -- unused + + N_Derived_Type_Definition => + (1 => False, -- unused + 2 => True, -- Interface_List (List2) + 3 => True, -- Record_Extension_Part (Node3) + 4 => False, -- unused + 5 => True), -- Subtype_Indication (Node5) + + N_Range_Constraint => + (1 => False, -- unused + 2 => False, -- unused + 3 => False, -- unused + 4 => True, -- Range_Expression (Node4) + 5 => False), -- unused + + N_Range => + (1 => True, -- Low_Bound (Node1) + 2 => True, -- High_Bound (Node2) + 3 => False, -- unused + 4 => False, -- unused + 5 => False), -- Etype (Node5-Sem) + + N_Enumeration_Type_Definition => + (1 => True, -- Literals (List1) + 2 => False, -- unused + 3 => False, -- unused + 4 => True, -- End_Label (Node4) + 5 => False), -- unused + + N_Defining_Character_Literal => + (1 => True, -- Chars (Name1) + 2 => False, -- Next_Entity (Node2-Sem) + 3 => False, -- Scope (Node3-Sem) + 4 => False, -- unused + 5 => False), -- Etype (Node5-Sem) + + N_Signed_Integer_Type_Definition => + (1 => True, -- Low_Bound (Node1) + 2 => True, -- High_Bound (Node2) + 3 => False, -- unused + 4 => False, -- unused + 5 => False), -- unused + + N_Modular_Type_Definition => + (1 => False, -- unused + 2 => False, -- unused + 3 => True, -- Expression (Node3) + 4 => False, -- unused + 5 => False), -- unused + + N_Floating_Point_Definition => + (1 => False, -- unused + 2 => True, -- Digits_Expression (Node2) + 3 => False, -- unused + 4 => True, -- Real_Range_Specification (Node4) + 5 => False), -- unused + + N_Real_Range_Specification => + (1 => True, -- Low_Bound (Node1) + 2 => True, -- High_Bound (Node2) + 3 => False, -- unused + 4 => False, -- unused + 5 => False), -- unused + + N_Ordinary_Fixed_Point_Definition => + (1 => False, -- unused + 2 => False, -- unused + 3 => True, -- Delta_Expression (Node3) + 4 => True, -- Real_Range_Specification (Node4) + 5 => False), -- unused + + N_Decimal_Fixed_Point_Definition => + (1 => False, -- unused + 2 => True, -- Digits_Expression (Node2) + 3 => True, -- Delta_Expression (Node3) + 4 => True, -- Real_Range_Specification (Node4) + 5 => False), -- unused + + N_Digits_Constraint => + (1 => False, -- unused + 2 => True, -- Digits_Expression (Node2) + 3 => False, -- unused + 4 => True, -- Range_Constraint (Node4) + 5 => False), -- unused + + N_Unconstrained_Array_Definition => + (1 => False, -- unused + 2 => True, -- Subtype_Marks (List2) + 3 => False, -- unused + 4 => True, -- Component_Definition (Node4) + 5 => False), -- unused + + N_Constrained_Array_Definition => + (1 => False, -- unused + 2 => True, -- Discrete_Subtype_Definitions (List2) + 3 => False, -- unused + 4 => True, -- Component_Definition (Node4) + 5 => False), -- unused + + N_Component_Definition => + (1 => False, -- unused + 2 => False, -- unused + 3 => True, -- Access_Definition (Node3) + 4 => False, -- unused + 5 => True), -- Subtype_Indication (Node5) + + N_Discriminant_Specification => + (1 => True, -- Defining_Identifier (Node1) + 2 => False, -- unused + 3 => True, -- Expression (Node3) + 4 => False, -- unused + 5 => True), -- Discriminant_Type (Node5) + + N_Index_Or_Discriminant_Constraint => + (1 => True, -- Constraints (List1) + 2 => False, -- unused + 3 => False, -- unused + 4 => False, -- unused + 5 => False), -- unused + + N_Discriminant_Association => + (1 => True, -- Selector_Names (List1) + 2 => False, -- unused + 3 => True, -- Expression (Node3) + 4 => False, -- unused + 5 => False), -- unused + + N_Record_Definition => + (1 => True, -- Component_List (Node1) + 2 => True, -- Interface_List (List2) + 3 => False, -- unused + 4 => True, -- End_Label (Node4) + 5 => False), -- unused + + N_Component_List => + (1 => False, -- unused + 2 => False, -- unused + 3 => True, -- Component_Items (List3) + 4 => True, -- Variant_Part (Node4) + 5 => False), -- unused + + N_Component_Declaration => + (1 => True, -- Defining_Identifier (Node1) + 2 => False, -- unused + 3 => True, -- Expression (Node3) + 4 => True, -- Component_Definition (Node4) + 5 => False), -- unused + + N_Variant_Part => + (1 => True, -- Variants (List1) + 2 => True, -- Name (Node2) + 3 => False, -- unused + 4 => False, -- unused + 5 => False), -- unused + + N_Variant => + (1 => True, -- Component_List (Node1) + 2 => False, -- Enclosing_Variant (Node2-Sem) + 3 => False, -- Present_Expr (Uint3-Sem) + 4 => True, -- Discrete_Choices (List4) + 5 => False), -- Dcheck_Function (Node5-Sem) + + N_Others_Choice => + (1 => False, -- Others_Discrete_Choices (List1-Sem) + 2 => False, -- unused + 3 => False, -- unused + 4 => False, -- unused + 5 => False), -- unused + + N_Access_To_Object_Definition => + (1 => False, -- unused + 2 => False, -- unused + 3 => False, -- unused + 4 => False, -- unused + 5 => True), -- Subtype_Indication (Node5) + + N_Access_Function_Definition => + (1 => False, -- unused + 2 => False, -- unused + 3 => True, -- Parameter_Specifications (List3) + 4 => True, -- Result_Definition (Node4) + 5 => False), -- unused + + N_Access_Procedure_Definition => + (1 => False, -- unused + 2 => False, -- unused + 3 => True, -- Parameter_Specifications (List3) + 4 => False, -- unused + 5 => False), -- unused + + N_Access_Definition => + (1 => False, -- unused + 2 => False, -- unused + 3 => True, -- Access_To_Subprogram_Definition (Node3) + 4 => True, -- Subtype_Mark (Node4) + 5 => False), -- unused + + N_Incomplete_Type_Declaration => + (1 => True, -- Defining_Identifier (Node1) + 2 => False, -- unused + 3 => False, -- unused + 4 => True, -- Discriminant_Specifications (List4) + 5 => False), -- unused + + N_Explicit_Dereference => + (1 => False, -- unused + 2 => False, -- unused + 3 => True, -- Prefix (Node3) + 4 => False, -- Actual_Designated_Subtype (Node4-Sem) + 5 => False), -- Etype (Node5-Sem) + + N_Indexed_Component => + (1 => True, -- Expressions (List1) + 2 => False, -- unused + 3 => True, -- Prefix (Node3) + 4 => False, -- unused + 5 => False), -- Etype (Node5-Sem) + + N_Slice => + (1 => False, -- unused + 2 => False, -- unused + 3 => True, -- Prefix (Node3) + 4 => True, -- Discrete_Range (Node4) + 5 => False), -- Etype (Node5-Sem) + + N_Selected_Component => + (1 => False, -- unused + 2 => True, -- Selector_Name (Node2) + 3 => True, -- Prefix (Node3) + 4 => False, -- unused + 5 => False), -- Etype (Node5-Sem) + + N_Attribute_Reference => + (1 => True, -- Expressions (List1) + 2 => True, -- Attribute_Name (Name2) + 3 => True, -- Prefix (Node3) + 4 => False, -- Entity (Node4-Sem) + 5 => False), -- Etype (Node5-Sem) + + N_Aggregate => + (1 => True, -- Expressions (List1) + 2 => True, -- Component_Associations (List2) + 3 => False, -- Aggregate_Bounds (Node3-Sem) + 4 => False, -- unused + 5 => False), -- Etype (Node5-Sem) + + N_Component_Association => + (1 => True, -- Choices (List1) + 2 => False, -- Loop_Actions (List2-Sem) + 3 => True, -- Expression (Node3) + 4 => False, -- unused + 5 => False), -- unused + + N_Extension_Aggregate => + (1 => True, -- Expressions (List1) + 2 => True, -- Component_Associations (List2) + 3 => True, -- Ancestor_Part (Node3) + 4 => False, -- unused + 5 => False), -- Etype (Node5-Sem) + + N_Null => + (1 => False, -- unused + 2 => False, -- unused + 3 => False, -- unused + 4 => False, -- unused + 5 => False), -- Etype (Node5-Sem) + + N_And_Then => + (1 => False, -- Actions (List1-Sem) + 2 => True, -- Left_Opnd (Node2) + 3 => True, -- Right_Opnd (Node3) + 4 => False, -- unused + 5 => False), -- Etype (Node5-Sem) + + N_Or_Else => + (1 => False, -- Actions (List1-Sem) + 2 => True, -- Left_Opnd (Node2) + 3 => True, -- Right_Opnd (Node3) + 4 => False, -- unused + 5 => False), -- Etype (Node5-Sem) + + N_In => + (1 => False, -- unused + 2 => True, -- Left_Opnd (Node2) + 3 => True, -- Right_Opnd (Node3) + 4 => False, -- unused + 5 => False), -- Etype (Node5-Sem) + + N_Not_In => + (1 => False, -- unused + 2 => True, -- Left_Opnd (Node2) + 3 => True, -- Right_Opnd (Node3) + 4 => False, -- unused + 5 => False), -- Etype (Node5-Sem) + + N_Op_And => + (1 => True, -- Chars (Name1) + 2 => True, -- Left_Opnd (Node2) + 3 => True, -- Right_Opnd (Node3) + 4 => False, -- Entity (Node4-Sem) + 5 => False), -- Etype (Node5-Sem) + + N_Op_Or => + (1 => True, -- Chars (Name1) + 2 => True, -- Left_Opnd (Node2) + 3 => True, -- Right_Opnd (Node3) + 4 => False, -- Entity (Node4-Sem) + 5 => False), -- Etype (Node5-Sem) + + N_Op_Xor => + (1 => True, -- Chars (Name1) + 2 => True, -- Left_Opnd (Node2) + 3 => True, -- Right_Opnd (Node3) + 4 => False, -- Entity (Node4-Sem) + 5 => False), -- Etype (Node5-Sem) + + N_Op_Eq => + (1 => True, -- Chars (Name1) + 2 => True, -- Left_Opnd (Node2) + 3 => True, -- Right_Opnd (Node3) + 4 => False, -- Entity (Node4-Sem) + 5 => False), -- Etype (Node5-Sem) + + N_Op_Ne => + (1 => True, -- Chars (Name1) + 2 => True, -- Left_Opnd (Node2) + 3 => True, -- Right_Opnd (Node3) + 4 => False, -- Entity (Node4-Sem) + 5 => False), -- Etype (Node5-Sem) + + N_Op_Lt => + (1 => True, -- Chars (Name1) + 2 => True, -- Left_Opnd (Node2) + 3 => True, -- Right_Opnd (Node3) + 4 => False, -- Entity (Node4-Sem) + 5 => False), -- Etype (Node5-Sem) + + N_Op_Le => + (1 => True, -- Chars (Name1) + 2 => True, -- Left_Opnd (Node2) + 3 => True, -- Right_Opnd (Node3) + 4 => False, -- Entity (Node4-Sem) + 5 => False), -- Etype (Node5-Sem) + + N_Op_Gt => + (1 => True, -- Chars (Name1) + 2 => True, -- Left_Opnd (Node2) + 3 => True, -- Right_Opnd (Node3) + 4 => False, -- Entity (Node4-Sem) + 5 => False), -- Etype (Node5-Sem) + + N_Op_Ge => + (1 => True, -- Chars (Name1) + 2 => True, -- Left_Opnd (Node2) + 3 => True, -- Right_Opnd (Node3) + 4 => False, -- Entity (Node4-Sem) + 5 => False), -- Etype (Node5-Sem) + + N_Op_Add => + (1 => True, -- Chars (Name1) + 2 => True, -- Left_Opnd (Node2) + 3 => True, -- Right_Opnd (Node3) + 4 => False, -- Entity (Node4-Sem) + 5 => False), -- Etype (Node5-Sem) + + N_Op_Subtract => + (1 => True, -- Chars (Name1) + 2 => True, -- Left_Opnd (Node2) + 3 => True, -- Right_Opnd (Node3) + 4 => False, -- Entity (Node4-Sem) + 5 => False), -- Etype (Node5-Sem) + + N_Op_Concat => + (1 => True, -- Chars (Name1) + 2 => True, -- Left_Opnd (Node2) + 3 => True, -- Right_Opnd (Node3) + 4 => False, -- Entity (Node4-Sem) + 5 => False), -- Etype (Node5-Sem) + + N_Op_Multiply => + (1 => True, -- Chars (Name1) + 2 => True, -- Left_Opnd (Node2) + 3 => True, -- Right_Opnd (Node3) + 4 => False, -- Entity (Node4-Sem) + 5 => False), -- Etype (Node5-Sem) + + N_Op_Divide => + (1 => True, -- Chars (Name1) + 2 => True, -- Left_Opnd (Node2) + 3 => True, -- Right_Opnd (Node3) + 4 => False, -- Entity (Node4-Sem) + 5 => False), -- Etype (Node5-Sem) + + N_Op_Mod => + (1 => True, -- Chars (Name1) + 2 => True, -- Left_Opnd (Node2) + 3 => True, -- Right_Opnd (Node3) + 4 => False, -- Entity (Node4-Sem) + 5 => False), -- Etype (Node5-Sem) + + N_Op_Rem => + (1 => True, -- Chars (Name1) + 2 => True, -- Left_Opnd (Node2) + 3 => True, -- Right_Opnd (Node3) + 4 => False, -- Entity (Node4-Sem) + 5 => False), -- Etype (Node5-Sem) + + N_Op_Expon => + (1 => True, -- Chars (Name1) + 2 => True, -- Left_Opnd (Node2) + 3 => True, -- Right_Opnd (Node3) + 4 => False, -- Entity (Node4-Sem) + 5 => False), -- Etype (Node5-Sem) + + N_Op_Plus => + (1 => True, -- Chars (Name1) + 2 => False, -- unused + 3 => True, -- Right_Opnd (Node3) + 4 => False, -- Entity (Node4-Sem) + 5 => False), -- Etype (Node5-Sem) + + N_Op_Minus => + (1 => True, -- Chars (Name1) + 2 => False, -- unused + 3 => True, -- Right_Opnd (Node3) + 4 => False, -- Entity (Node4-Sem) + 5 => False), -- Etype (Node5-Sem) + + N_Op_Abs => + (1 => True, -- Chars (Name1) + 2 => False, -- unused + 3 => True, -- Right_Opnd (Node3) + 4 => False, -- Entity (Node4-Sem) + 5 => False), -- Etype (Node5-Sem) + + N_Op_Not => + (1 => True, -- Chars (Name1) + 2 => False, -- unused + 3 => True, -- Right_Opnd (Node3) + 4 => False, -- Entity (Node4-Sem) + 5 => False), -- Etype (Node5-Sem) + + N_Type_Conversion => + (1 => False, -- unused + 2 => False, -- unused + 3 => True, -- Expression (Node3) + 4 => True, -- Subtype_Mark (Node4) + 5 => False), -- Etype (Node5-Sem) + + N_Qualified_Expression => + (1 => False, -- unused + 2 => False, -- unused + 3 => True, -- Expression (Node3) + 4 => True, -- Subtype_Mark (Node4) + 5 => False), -- Etype (Node5-Sem) + + N_Allocator => + (1 => False, -- Storage_Pool (Node1-Sem) + 2 => False, -- Procedure_To_Call (Node2-Sem) + 3 => True, -- Expression (Node3) + 4 => False, -- Coextensions (Elist4-Sem) + 5 => False), -- Etype (Node5-Sem) + + N_Null_Statement => + (1 => False, -- unused + 2 => False, -- unused + 3 => False, -- unused + 4 => False, -- unused + 5 => False), -- unused + + N_Label => + (1 => True, -- Identifier (Node1) + 2 => False, -- unused + 3 => False, -- unused + 4 => False, -- unused + 5 => False), -- unused + + N_Assignment_Statement => + (1 => False, -- unused + 2 => True, -- Name (Node2) + 3 => True, -- Expression (Node3) + 4 => False, -- unused + 5 => False), -- unused + + N_If_Statement => + (1 => True, -- Condition (Node1) + 2 => True, -- Then_Statements (List2) + 3 => True, -- Elsif_Parts (List3) + 4 => True, -- Else_Statements (List4) + 5 => True), -- End_Span (Uint5) + + N_Elsif_Part => + (1 => True, -- Condition (Node1) + 2 => True, -- Then_Statements (List2) + 3 => False, -- Condition_Actions (List3-Sem) + 4 => False, -- unused + 5 => False), -- unused + + N_Case_Statement => + (1 => False, -- unused + 2 => False, -- unused + 3 => True, -- Expression (Node3) + 4 => True, -- Alternatives (List4) + 5 => True), -- End_Span (Uint5) + + N_Case_Statement_Alternative => + (1 => False, -- unused + 2 => False, -- unused + 3 => True, -- Statements (List3) + 4 => True, -- Discrete_Choices (List4) + 5 => False), -- unused + + N_Loop_Statement => + (1 => True, -- Identifier (Node1) + 2 => True, -- Iteration_Scheme (Node2) + 3 => True, -- Statements (List3) + 4 => True, -- End_Label (Node4) + 5 => False), -- unused + + N_Iteration_Scheme => + (1 => True, -- Condition (Node1) + 2 => False, -- unused + 3 => False, -- Condition_Actions (List3-Sem) + 4 => True, -- Loop_Parameter_Specification (Node4) + 5 => False), -- unused + + N_Loop_Parameter_Specification => + (1 => True, -- Defining_Identifier (Node1) + 2 => False, -- unused + 3 => False, -- unused + 4 => True, -- Discrete_Subtype_Definition (Node4) + 5 => False), -- unused + + N_Block_Statement => + (1 => True, -- Identifier (Node1) + 2 => True, -- Declarations (List2) + 3 => False, -- Activation_Chain_Entity (Node3-Sem) + 4 => True, -- Handled_Statement_Sequence (Node4) + 5 => False), -- unused + + N_Exit_Statement => + (1 => True, -- Condition (Node1) + 2 => True, -- Name (Node2) + 3 => False, -- unused + 4 => False, -- unused + 5 => False), -- unused + + N_Goto_Statement => + (1 => False, -- unused + 2 => True, -- Name (Node2) + 3 => False, -- unused + 4 => False, -- unused + 5 => False), -- unused + + N_Subprogram_Declaration => + (1 => True, -- Specification (Node1) + 2 => False, -- unused + 3 => False, -- Body_To_Inline (Node3-Sem) + 4 => False, -- Parent_Spec (Node4-Sem) + 5 => False), -- Corresponding_Body (Node5-Sem) + + N_Abstract_Subprogram_Declaration => + (1 => True, -- Specification (Node1) + 2 => False, -- unused + 3 => False, -- unused + 4 => False, -- unused + 5 => False), -- unused + + N_Function_Specification => + (1 => True, -- Defining_Unit_Name (Node1) + 2 => False, -- Elaboration_Boolean (Node2-Sem) + 3 => True, -- Parameter_Specifications (List3) + 4 => True, -- Result_Definition (Node4) + 5 => False), -- Generic_Parent (Node5-Sem) + + N_Procedure_Specification => + (1 => True, -- Defining_Unit_Name (Node1) + 2 => False, -- Elaboration_Boolean (Node2-Sem) + 3 => True, -- Parameter_Specifications (List3) + 4 => False, -- unused + 5 => False), -- Generic_Parent (Node5-Sem) + + N_Designator => + (1 => True, -- Identifier (Node1) + 2 => True, -- Name (Node2) + 3 => False, -- unused + 4 => False, -- unused + 5 => False), -- unused + + N_Defining_Program_Unit_Name => + (1 => True, -- Defining_Identifier (Node1) + 2 => True, -- Name (Node2) + 3 => False, -- unused + 4 => False, -- unused + 5 => False), -- unused + + N_Operator_Symbol => + (1 => True, -- Chars (Name1) + 2 => False, -- unused + 3 => True, -- Strval (Str3) + 4 => False, -- Entity (Node4-Sem) + 5 => False), -- Etype (Node5-Sem) + + N_Defining_Operator_Symbol => + (1 => True, -- Chars (Name1) + 2 => False, -- Next_Entity (Node2-Sem) + 3 => False, -- Scope (Node3-Sem) + 4 => False, -- unused + 5 => False), -- Etype (Node5-Sem) + + N_Parameter_Specification => + (1 => True, -- Defining_Identifier (Node1) + 2 => True, -- Parameter_Type (Node2) + 3 => True, -- Expression (Node3) + 4 => False, -- unused + 5 => False), -- Default_Expression (Node5-Sem) + + N_Subprogram_Body => + (1 => True, -- Specification (Node1) + 2 => True, -- Declarations (List2) + 3 => False, -- Activation_Chain_Entity (Node3-Sem) + 4 => True, -- Handled_Statement_Sequence (Node4) + 5 => False), -- Corresponding_Spec (Node5-Sem) + + N_Procedure_Call_Statement => + (1 => False, -- Controlling_Argument (Node1-Sem) + 2 => True, -- Name (Node2) + 3 => True, -- Parameter_Associations (List3) + 4 => False, -- First_Named_Actual (Node4-Sem) + 5 => False), -- Etype (Node5-Sem) + + N_Function_Call => + (1 => False, -- Controlling_Argument (Node1-Sem) + 2 => True, -- Name (Node2) + 3 => True, -- Parameter_Associations (List3) + 4 => False, -- First_Named_Actual (Node4-Sem) + 5 => False), -- Etype (Node5-Sem) + + N_Parameter_Association => + (1 => False, -- unused + 2 => True, -- Selector_Name (Node2) + 3 => True, -- Explicit_Actual_Parameter (Node3) + 4 => False, -- Next_Named_Actual (Node4-Sem) + 5 => False), -- unused + + N_Return_Statement => + (1 => False, -- Storage_Pool (Node1-Sem) + 2 => False, -- Procedure_To_Call (Node2-Sem) + 3 => True, -- Expression (Node3) + 4 => False, -- unused + 5 => False), -- Return_Statement_Entity (Node5-Sem) + + N_Extended_Return_Statement => + (1 => False, -- Storage_Pool (Node1-Sem) + 2 => False, -- Procedure_To_Call (Node2-Sem) + 3 => True, -- Return_Object_Declarations (List3) + 4 => True, -- Handled_Statement_Sequence (Node4) + 5 => False), -- Return_Statement_Entity (Node5-Sem) + + N_Package_Declaration => + (1 => True, -- Specification (Node1) + 2 => False, -- unused + 3 => False, -- Activation_Chain_Entity (Node3-Sem) + 4 => False, -- Parent_Spec (Node4-Sem) + 5 => False), -- Corresponding_Body (Node5-Sem) + + N_Package_Specification => + (1 => True, -- Defining_Unit_Name (Node1) + 2 => True, -- Visible_Declarations (List2) + 3 => True, -- Private_Declarations (List3) + 4 => True, -- End_Label (Node4) + 5 => False), -- Generic_Parent (Node5-Sem) + + N_Package_Body => + (1 => True, -- Defining_Unit_Name (Node1) + 2 => True, -- Declarations (List2) + 3 => False, -- unused + 4 => True, -- Handled_Statement_Sequence (Node4) + 5 => False), -- Corresponding_Spec (Node5-Sem) + + N_Private_Type_Declaration => + (1 => True, -- Defining_Identifier (Node1) + 2 => False, -- unused + 3 => False, -- unused + 4 => True, -- Discriminant_Specifications (List4) + 5 => False), -- unused + + N_Private_Extension_Declaration => + (1 => True, -- Defining_Identifier (Node1) + 2 => True, -- Interface_List (List2) + 3 => False, -- unused + 4 => True, -- Discriminant_Specifications (List4) + 5 => True), -- Subtype_Indication (Node5) + + N_Use_Package_Clause => + (1 => False, -- unused + 2 => True, -- Names (List2) + 3 => False, -- Next_Use_Clause (Node3-Sem) + 4 => False, -- Hidden_By_Use_Clause (Elist4-Sem) + 5 => False), -- unused + + N_Use_Type_Clause => + (1 => False, -- unused + 2 => True, -- Subtype_Marks (List2) + 3 => False, -- Next_Use_Clause (Node3-Sem) + 4 => False, -- Hidden_By_Use_Clause (Elist4-Sem) + 5 => False), -- unused + + N_Object_Renaming_Declaration => + (1 => True, -- Defining_Identifier (Node1) + 2 => True, -- Name (Node2) + 3 => True, -- Access_Definition (Node3) + 4 => True, -- Subtype_Mark (Node4) + 5 => False), -- Corresponding_Generic_Association (Node5-Sem) + + N_Exception_Renaming_Declaration => + (1 => True, -- Defining_Identifier (Node1) + 2 => True, -- Name (Node2) + 3 => False, -- unused + 4 => False, -- unused + 5 => False), -- unused + + N_Package_Renaming_Declaration => + (1 => True, -- Defining_Unit_Name (Node1) + 2 => True, -- Name (Node2) + 3 => False, -- unused + 4 => False, -- Parent_Spec (Node4-Sem) + 5 => False), -- unused + + N_Subprogram_Renaming_Declaration => + (1 => True, -- Specification (Node1) + 2 => True, -- Name (Node2) + 3 => False, -- Corresponding_Formal_Spec (Node3-Sem) + 4 => False, -- Parent_Spec (Node4-Sem) + 5 => False), -- Corresponding_Spec (Node5-Sem) + + N_Generic_Package_Renaming_Declaration => + (1 => True, -- Defining_Unit_Name (Node1) + 2 => True, -- Name (Node2) + 3 => False, -- unused + 4 => False, -- Parent_Spec (Node4-Sem) + 5 => False), -- unused + + N_Generic_Procedure_Renaming_Declaration => + (1 => True, -- Defining_Unit_Name (Node1) + 2 => True, -- Name (Node2) + 3 => False, -- unused + 4 => False, -- Parent_Spec (Node4-Sem) + 5 => False), -- unused + + N_Generic_Function_Renaming_Declaration => + (1 => True, -- Defining_Unit_Name (Node1) + 2 => True, -- Name (Node2) + 3 => False, -- unused + 4 => False, -- Parent_Spec (Node4-Sem) + 5 => False), -- unused + + N_Task_Type_Declaration => + (1 => True, -- Defining_Identifier (Node1) + 2 => True, -- Interface_List (List2) + 3 => True, -- Task_Definition (Node3) + 4 => True, -- Discriminant_Specifications (List4) + 5 => False), -- Corresponding_Body (Node5-Sem) + + N_Single_Task_Declaration => + (1 => True, -- Defining_Identifier (Node1) + 2 => True, -- Interface_List (List2) + 3 => True, -- Task_Definition (Node3) + 4 => False, -- unused + 5 => False), -- unused + + N_Task_Definition => + (1 => False, -- unused + 2 => True, -- Visible_Declarations (List2) + 3 => True, -- Private_Declarations (List3) + 4 => True, -- End_Label (Node4) + 5 => False), -- unused + + N_Task_Body => + (1 => True, -- Defining_Identifier (Node1) + 2 => True, -- Declarations (List2) + 3 => False, -- Activation_Chain_Entity (Node3-Sem) + 4 => True, -- Handled_Statement_Sequence (Node4) + 5 => False), -- Corresponding_Spec (Node5-Sem) + + N_Protected_Type_Declaration => + (1 => True, -- Defining_Identifier (Node1) + 2 => True, -- Interface_List (List2) + 3 => True, -- Protected_Definition (Node3) + 4 => True, -- Discriminant_Specifications (List4) + 5 => False), -- Corresponding_Body (Node5-Sem) + + N_Single_Protected_Declaration => + (1 => True, -- Defining_Identifier (Node1) + 2 => True, -- Interface_List (List2) + 3 => True, -- Protected_Definition (Node3) + 4 => False, -- unused + 5 => False), -- unused + + N_Protected_Definition => + (1 => False, -- unused + 2 => True, -- Visible_Declarations (List2) + 3 => True, -- Private_Declarations (List3) + 4 => True, -- End_Label (Node4) + 5 => False), -- unused + + N_Protected_Body => + (1 => True, -- Defining_Identifier (Node1) + 2 => True, -- Declarations (List2) + 3 => False, -- unused + 4 => True, -- End_Label (Node4) + 5 => False), -- Corresponding_Spec (Node5-Sem) + + N_Entry_Declaration => + (1 => True, -- Defining_Identifier (Node1) + 2 => False, -- unused + 3 => True, -- Parameter_Specifications (List3) + 4 => True, -- Discrete_Subtype_Definition (Node4) + 5 => False), -- Corresponding_Body (Node5-Sem) + + N_Accept_Statement => + (1 => True, -- Entry_Direct_Name (Node1) + 2 => True, -- Declarations (List2) + 3 => True, -- Parameter_Specifications (List3) + 4 => True, -- Handled_Statement_Sequence (Node4) + 5 => True), -- Entry_Index (Node5) + + N_Entry_Body => + (1 => True, -- Defining_Identifier (Node1) + 2 => True, -- Declarations (List2) + 3 => False, -- Activation_Chain_Entity (Node3-Sem) + 4 => True, -- Handled_Statement_Sequence (Node4) + 5 => True), -- Entry_Body_Formal_Part (Node5) + + N_Entry_Body_Formal_Part => + (1 => True, -- Condition (Node1) + 2 => False, -- unused + 3 => True, -- Parameter_Specifications (List3) + 4 => True, -- Entry_Index_Specification (Node4) + 5 => False), -- unused + + N_Entry_Index_Specification => + (1 => True, -- Defining_Identifier (Node1) + 2 => False, -- unused + 3 => False, -- unused + 4 => True, -- Discrete_Subtype_Definition (Node4) + 5 => False), -- unused + + N_Entry_Call_Statement => + (1 => False, -- unused + 2 => True, -- Name (Node2) + 3 => True, -- Parameter_Associations (List3) + 4 => False, -- First_Named_Actual (Node4-Sem) + 5 => False), -- unused + + N_Requeue_Statement => + (1 => False, -- unused + 2 => True, -- Name (Node2) + 3 => False, -- unused + 4 => False, -- unused + 5 => False), -- unused + + N_Delay_Until_Statement => + (1 => False, -- unused + 2 => False, -- unused + 3 => True, -- Expression (Node3) + 4 => False, -- unused + 5 => False), -- unused + + N_Delay_Relative_Statement => + (1 => False, -- unused + 2 => False, -- unused + 3 => True, -- Expression (Node3) + 4 => False, -- unused + 5 => False), -- unused + + N_Selective_Accept => + (1 => True, -- Select_Alternatives (List1) + 2 => False, -- unused + 3 => False, -- unused + 4 => True, -- Else_Statements (List4) + 5 => False), -- unused + + N_Accept_Alternative => + (1 => True, -- Condition (Node1) + 2 => True, -- Accept_Statement (Node2) + 3 => True, -- Statements (List3) + 4 => True, -- Pragmas_Before (List4) + 5 => False), -- Accept_Handler_Records (List5-Sem) + + N_Delay_Alternative => + (1 => True, -- Condition (Node1) + 2 => True, -- Delay_Statement (Node2) + 3 => True, -- Statements (List3) + 4 => True, -- Pragmas_Before (List4) + 5 => False), -- unused + + N_Terminate_Alternative => + (1 => True, -- Condition (Node1) + 2 => False, -- unused + 3 => False, -- unused + 4 => True, -- Pragmas_Before (List4) + 5 => True), -- Pragmas_After (List5) + + N_Timed_Entry_Call => + (1 => True, -- Entry_Call_Alternative (Node1) + 2 => False, -- unused + 3 => False, -- unused + 4 => True, -- Delay_Alternative (Node4) + 5 => False), -- unused + + N_Entry_Call_Alternative => + (1 => True, -- Entry_Call_Statement (Node1) + 2 => False, -- unused + 3 => True, -- Statements (List3) + 4 => True, -- Pragmas_Before (List4) + 5 => False), -- unused + + N_Conditional_Entry_Call => + (1 => True, -- Entry_Call_Alternative (Node1) + 2 => False, -- unused + 3 => False, -- unused + 4 => True, -- Else_Statements (List4) + 5 => False), -- unused + + N_Asynchronous_Select => + (1 => True, -- Triggering_Alternative (Node1) + 2 => True, -- Abortable_Part (Node2) + 3 => False, -- unused + 4 => False, -- unused + 5 => False), -- unused + + N_Triggering_Alternative => + (1 => True, -- Triggering_Statement (Node1) + 2 => False, -- unused + 3 => True, -- Statements (List3) + 4 => True, -- Pragmas_Before (List4) + 5 => False), -- unused + + N_Abortable_Part => + (1 => False, -- unused + 2 => False, -- unused + 3 => True, -- Statements (List3) + 4 => False, -- unused + 5 => False), -- unused + + N_Abort_Statement => + (1 => False, -- unused + 2 => True, -- Names (List2) + 3 => False, -- unused + 4 => False, -- unused + 5 => False), -- unused + + N_Compilation_Unit => + (1 => True, -- Context_Items (List1) + 2 => True, -- Unit (Node2) + 3 => False, -- First_Inlined_Subprogram (Node3-Sem) + 4 => False, -- Library_Unit (Node4-Sem) + 5 => True), -- Aux_Decls_Node (Node5) + + N_Compilation_Unit_Aux => + (1 => True, -- Actions (List1) + 2 => True, -- Declarations (List2) + 3 => False, -- unused + 4 => True, -- Config_Pragmas (List4) + 5 => True), -- Pragmas_After (List5) + + N_With_Clause => + (1 => False, -- unused + 2 => True, -- Name (Node2) + 3 => False, -- unused + 4 => False, -- Library_Unit (Node4-Sem) + 5 => False), -- Corresponding_Spec (Node5-Sem) + + N_Subprogram_Body_Stub => + (1 => True, -- Specification (Node1) + 2 => False, -- unused + 3 => False, -- unused + 4 => False, -- Library_Unit (Node4-Sem) + 5 => False), -- Corresponding_Body (Node5-Sem) + + N_Package_Body_Stub => + (1 => True, -- Defining_Identifier (Node1) + 2 => False, -- unused + 3 => False, -- unused + 4 => False, -- Library_Unit (Node4-Sem) + 5 => False), -- Corresponding_Body (Node5-Sem) + + N_Task_Body_Stub => + (1 => True, -- Defining_Identifier (Node1) + 2 => False, -- unused + 3 => False, -- unused + 4 => False, -- Library_Unit (Node4-Sem) + 5 => False), -- Corresponding_Body (Node5-Sem) + + N_Protected_Body_Stub => + (1 => True, -- Defining_Identifier (Node1) + 2 => False, -- unused + 3 => False, -- unused + 4 => False, -- Library_Unit (Node4-Sem) + 5 => False), -- Corresponding_Body (Node5-Sem) + + N_Subunit => + (1 => True, -- Proper_Body (Node1) + 2 => True, -- Name (Node2) + 3 => False, -- Corresponding_Stub (Node3-Sem) + 4 => False, -- unused + 5 => False), -- unused + + N_Exception_Declaration => + (1 => True, -- Defining_Identifier (Node1) + 2 => False, -- unused + 3 => False, -- Expression (Node3-Sem) + 4 => False, -- unused + 5 => False), -- unused + + N_Handled_Sequence_Of_Statements => + (1 => True, -- At_End_Proc (Node1) + 2 => False, -- First_Real_Statement (Node2-Sem) + 3 => True, -- Statements (List3) + 4 => True, -- End_Label (Node4) + 5 => True), -- Exception_Handlers (List5) + + N_Exception_Handler => + (1 => False, -- Local_Raise_Statements (Elist1) + 2 => True, -- Choice_Parameter (Node2) + 3 => True, -- Statements (List3) + 4 => True, -- Exception_Choices (List4) + 5 => False), -- Exception_Label (Node5) + + N_Raise_Statement => + (1 => False, -- unused + 2 => True, -- Name (Node2) + 3 => True, -- Expression (Node3) + 4 => False, -- unused + 5 => False), -- unused + + N_Generic_Subprogram_Declaration => + (1 => True, -- Specification (Node1) + 2 => True, -- Generic_Formal_Declarations (List2) + 3 => False, -- unused + 4 => False, -- Parent_Spec (Node4-Sem) + 5 => False), -- Corresponding_Body (Node5-Sem) + + N_Generic_Package_Declaration => + (1 => True, -- Specification (Node1) + 2 => True, -- Generic_Formal_Declarations (List2) + 3 => False, -- Activation_Chain_Entity (Node3-Sem) + 4 => False, -- Parent_Spec (Node4-Sem) + 5 => False), -- Corresponding_Body (Node5-Sem) + + N_Package_Instantiation => + (1 => True, -- Defining_Unit_Name (Node1) + 2 => True, -- Name (Node2) + 3 => True, -- Generic_Associations (List3) + 4 => False, -- Parent_Spec (Node4-Sem) + 5 => False), -- Instance_Spec (Node5-Sem) + + N_Procedure_Instantiation => + (1 => True, -- Defining_Unit_Name (Node1) + 2 => True, -- Name (Node2) + 3 => True, -- Generic_Associations (List3) + 4 => False, -- Parent_Spec (Node4-Sem) + 5 => False), -- Instance_Spec (Node5-Sem) + + N_Function_Instantiation => + (1 => True, -- Defining_Unit_Name (Node1) + 2 => True, -- Name (Node2) + 3 => True, -- Generic_Associations (List3) + 4 => False, -- Parent_Spec (Node4-Sem) + 5 => False), -- Instance_Spec (Node5-Sem) + + N_Generic_Association => + (1 => True, -- Explicit_Generic_Actual_Parameter (Node1) + 2 => True, -- Selector_Name (Node2) + 3 => False, -- unused + 4 => False, -- unused + 5 => False), -- unused + + N_Formal_Object_Declaration => + (1 => True, -- Defining_Identifier (Node1) + 2 => False, -- unused + 3 => True, -- Access_Definition (Node3) + 4 => True, -- Subtype_Mark (Node4) + 5 => True), -- Default_Expression (Node5) + + N_Formal_Type_Declaration => + (1 => True, -- Defining_Identifier (Node1) + 2 => False, -- unused + 3 => True, -- Formal_Type_Definition (Node3) + 4 => True, -- Discriminant_Specifications (List4) + 5 => False), -- unused + + N_Formal_Private_Type_Definition => + (1 => False, -- unused + 2 => False, -- unused + 3 => False, -- unused + 4 => False, -- unused + 5 => False), -- unused + + N_Formal_Derived_Type_Definition => + (1 => False, -- unused + 2 => True, -- Interface_List (List2) + 3 => False, -- unused + 4 => True, -- Subtype_Mark (Node4) + 5 => False), -- unused + + N_Formal_Discrete_Type_Definition => + (1 => False, -- unused + 2 => False, -- unused + 3 => False, -- unused + 4 => False, -- unused + 5 => False), -- unused + + N_Formal_Signed_Integer_Type_Definition => + (1 => False, -- unused + 2 => False, -- unused + 3 => False, -- unused + 4 => False, -- unused + 5 => False), -- unused + + N_Formal_Modular_Type_Definition => + (1 => False, -- unused + 2 => False, -- unused + 3 => False, -- unused + 4 => False, -- unused + 5 => False), -- unused + + N_Formal_Floating_Point_Definition => + (1 => False, -- unused + 2 => False, -- unused + 3 => False, -- unused + 4 => False, -- unused + 5 => False), -- unused + + N_Formal_Ordinary_Fixed_Point_Definition => + (1 => False, -- unused + 2 => False, -- unused + 3 => False, -- unused + 4 => False, -- unused + 5 => False), -- unused + + N_Formal_Decimal_Fixed_Point_Definition => + (1 => False, -- unused + 2 => False, -- unused + 3 => False, -- unused + 4 => False, -- unused + 5 => False), -- unused + + N_Formal_Concrete_Subprogram_Declaration => + (1 => True, -- Specification (Node1) + 2 => True, -- Default_Name (Node2) + 3 => False, -- unused + 4 => False, -- unused + 5 => False), -- unused + + N_Formal_Abstract_Subprogram_Declaration => + (1 => True, -- Specification (Node1) + 2 => True, -- Default_Name (Node2) + 3 => False, -- unused + 4 => False, -- unused + 5 => False), -- unused + + N_Formal_Package_Declaration => + (1 => True, -- Defining_Identifier (Node1) + 2 => True, -- Name (Node2) + 3 => True, -- Generic_Associations (List3) + 4 => False, -- unused + 5 => False), -- Instance_Spec (Node5-Sem) + + N_Attribute_Definition_Clause => + (1 => True, -- Chars (Name1) + 2 => True, -- Name (Node2) + 3 => True, -- Expression (Node3) + 4 => False, -- unused + 5 => False), -- Next_Rep_Item (Node5-Sem) + + N_Enumeration_Representation_Clause => + (1 => True, -- Identifier (Node1) + 2 => False, -- unused + 3 => True, -- Array_Aggregate (Node3) + 4 => False, -- unused + 5 => False), -- Next_Rep_Item (Node5-Sem) + + N_Record_Representation_Clause => + (1 => True, -- Identifier (Node1) + 2 => True, -- Mod_Clause (Node2) + 3 => True, -- Component_Clauses (List3) + 4 => False, -- unused + 5 => False), -- Next_Rep_Item (Node5-Sem) + + N_Component_Clause => + (1 => True, -- Component_Name (Node1) + 2 => True, -- Position (Node2) + 3 => True, -- First_Bit (Node3) + 4 => True, -- Last_Bit (Node4) + 5 => False), -- unused + + N_Code_Statement => + (1 => False, -- unused + 2 => False, -- unused + 3 => True, -- Expression (Node3) + 4 => False, -- unused + 5 => False), -- unused + + N_Op_Rotate_Left => + (1 => True, -- Chars (Name1) + 2 => True, -- Left_Opnd (Node2) + 3 => True, -- Right_Opnd (Node3) + 4 => False, -- Entity (Node4-Sem) + 5 => False), -- Etype (Node5-Sem) + + N_Op_Rotate_Right => + (1 => True, -- Chars (Name1) + 2 => True, -- Left_Opnd (Node2) + 3 => True, -- Right_Opnd (Node3) + 4 => False, -- Entity (Node4-Sem) + 5 => False), -- Etype (Node5-Sem) + + N_Op_Shift_Left => + (1 => True, -- Chars (Name1) + 2 => True, -- Left_Opnd (Node2) + 3 => True, -- Right_Opnd (Node3) + 4 => False, -- Entity (Node4-Sem) + 5 => False), -- Etype (Node5-Sem) + + N_Op_Shift_Right_Arithmetic => + (1 => True, -- Chars (Name1) + 2 => True, -- Left_Opnd (Node2) + 3 => True, -- Right_Opnd (Node3) + 4 => False, -- Entity (Node4-Sem) + 5 => False), -- Etype (Node5-Sem) + + N_Op_Shift_Right => + (1 => True, -- Chars (Name1) + 2 => True, -- Left_Opnd (Node2) + 3 => True, -- Right_Opnd (Node3) + 4 => False, -- Entity (Node4-Sem) + 5 => False), -- Etype (Node5-Sem) + + N_Delta_Constraint => + (1 => False, -- unused + 2 => False, -- unused + 3 => True, -- Delta_Expression (Node3) + 4 => True, -- Range_Constraint (Node4) + 5 => False), -- unused + + N_At_Clause => + (1 => True, -- Identifier (Node1) + 2 => False, -- unused + 3 => True, -- Expression (Node3) + 4 => False, -- unused + 5 => False), -- unused + + N_Mod_Clause => + (1 => False, -- unused + 2 => False, -- unused + 3 => True, -- Expression (Node3) + 4 => True, -- Pragmas_Before (List4) + 5 => False), -- unused + + N_Conditional_Expression => + (1 => True, -- Expressions (List1) + 2 => False, -- Then_Actions (List2-Sem) + 3 => False, -- Else_Actions (List3-Sem) + 4 => False, -- unused + 5 => False), -- Etype (Node5-Sem) + + N_Expanded_Name => + (1 => True, -- Chars (Name1) + 2 => True, -- Selector_Name (Node2) + 3 => True, -- Prefix (Node3) + 4 => False, -- Entity (Node4-Sem) + 5 => False), -- Etype (Node5-Sem) + + N_Free_Statement => + (1 => False, -- Storage_Pool (Node1-Sem) + 2 => False, -- Procedure_To_Call (Node2-Sem) + 3 => True, -- Expression (Node3) + 4 => False, -- Actual_Designated_Subtype (Node4-Sem) + 5 => False), -- unused + + N_Freeze_Entity => + (1 => True, -- Actions (List1) + 2 => False, -- Access_Types_To_Process (Elist2-Sem) + 3 => False, -- TSS_Elist (Elist3-Sem) + 4 => False, -- Entity (Node4-Sem) + 5 => False), -- First_Subtype_Link (Node5-Sem) + + N_Implicit_Label_Declaration => + (1 => True, -- Defining_Identifier (Node1) + 2 => False, -- Label_Construct (Node2-Sem) + 3 => False, -- unused + 4 => False, -- unused + 5 => False), -- unused + + N_Itype_Reference => + (1 => False, -- Itype (Node1-Sem) + 2 => False, -- unused + 3 => False, -- unused + 4 => False, -- unused + 5 => False), -- unused + + N_Raise_Constraint_Error => + (1 => True, -- Condition (Node1) + 2 => False, -- unused + 3 => True, -- Reason (Uint3) + 4 => False, -- unused + 5 => False), -- Etype (Node5-Sem) + + N_Raise_Program_Error => + (1 => True, -- Condition (Node1) + 2 => False, -- unused + 3 => True, -- Reason (Uint3) + 4 => False, -- unused + 5 => False), -- Etype (Node5-Sem) + + N_Raise_Storage_Error => + (1 => True, -- Condition (Node1) + 2 => False, -- unused + 3 => True, -- Reason (Uint3) + 4 => False, -- unused + 5 => False), -- Etype (Node5-Sem) + + N_Push_Constraint_Error_Label => + (1 => False, -- unused + 2 => False, -- unused + 3 => False, -- unused + 4 => False, -- unused + 5 => False), -- unused + + N_Push_Program_Error_Label => + (1 => False, -- Exception_Label + 2 => False, -- unused + 3 => False, -- unused + 4 => False, -- unused + 5 => False), -- Exception_Label + + N_Push_Storage_Error_Label => + (1 => False, -- Exception_Label + 2 => False, -- unused + 3 => False, -- unused + 4 => False, -- unused + 5 => False), -- Exception_Label + + N_Pop_Constraint_Error_Label => + (1 => False, -- unused + 2 => False, -- unused + 3 => False, -- unused + 4 => False, -- unused + 5 => False), -- unused + + N_Pop_Program_Error_Label => + (1 => False, -- unused + 2 => False, -- unused + 3 => False, -- unused + 4 => False, -- unused + 5 => False), -- unused + + N_Pop_Storage_Error_Label => + (1 => False, -- unused + 2 => False, -- unused + 3 => False, -- unused + 4 => False, -- unused + 5 => False), -- unused + + N_Reference => + (1 => False, -- unused + 2 => False, -- unused + 3 => True, -- Prefix (Node3) + 4 => False, -- unused + 5 => False), -- Etype (Node5-Sem) + + N_Subprogram_Info => + (1 => True, -- Identifier (Node1) + 2 => False, -- unused + 3 => False, -- unused + 4 => False, -- unused + 5 => False), -- Etype (Node5-Sem) + + N_Unchecked_Expression => + (1 => False, -- unused + 2 => False, -- unused + 3 => True, -- Expression (Node3) + 4 => False, -- unused + 5 => False), -- Etype (Node5-Sem) + + N_Unchecked_Type_Conversion => + (1 => False, -- unused + 2 => False, -- unused + 3 => True, -- Expression (Node3) + 4 => True, -- Subtype_Mark (Node4) + 5 => False), -- Etype (Node5-Sem) + + N_Validate_Unchecked_Conversion => + (1 => False, -- Source_Type (Node1-Sem) + 2 => False, -- Target_Type (Node2-Sem) + 3 => False, -- unused + 4 => False, -- unused + 5 => False), -- unused + + -- End of inserted output from makeisf program + + -- Entries for Empty, Error and Unused. Even thought these have a Chars + -- field for debugging purposes, they are not really syntactic fields, so + -- we mark all fields as unused. + + N_Empty => + (1 => False, -- unused + 2 => False, -- unused + 3 => False, -- unused + 4 => False, -- unused + 5 => False), -- unused + + N_Error => + (1 => False, -- unused + 2 => False, -- unused + 3 => False, -- unused + 4 => False, -- unused + 5 => False), -- unused + + N_Unused_At_Start => + (1 => False, -- unused + 2 => False, -- unused + 3 => False, -- unused + 4 => False, -- unused + 5 => False), -- unused + + N_Unused_At_End => + (1 => False, -- unused + 2 => False, -- unused + 3 => False, -- unused + 4 => False, -- unused + 5 => False)); -- unused + + -------------------- + -- Inline Pragmas -- + -------------------- + + pragma Inline (ABE_Is_Certain); + pragma Inline (Abort_Present); + pragma Inline (Abortable_Part); + pragma Inline (Abstract_Present); + pragma Inline (Accept_Handler_Records); + pragma Inline (Accept_Statement); + pragma Inline (Access_Definition); + pragma Inline (Access_To_Subprogram_Definition); + pragma Inline (Access_Types_To_Process); + pragma Inline (Actions); + pragma Inline (Activation_Chain_Entity); + pragma Inline (Acts_As_Spec); + pragma Inline (Actual_Designated_Subtype); + pragma Inline (Address_Warning_Posted); + pragma Inline (Aggregate_Bounds); + pragma Inline (Aliased_Present); + pragma Inline (All_Others); + pragma Inline (All_Present); + pragma Inline (Alternatives); + pragma Inline (Ancestor_Part); + pragma Inline (Array_Aggregate); + pragma Inline (Assignment_OK); + pragma Inline (Associated_Node); + pragma Inline (At_End_Proc); + pragma Inline (Attribute_Name); + pragma Inline (Aux_Decls_Node); + pragma Inline (Backwards_OK); + pragma Inline (Bad_Is_Detected); + pragma Inline (Body_To_Inline); + pragma Inline (Body_Required); + pragma Inline (By_Ref); + pragma Inline (Box_Present); + pragma Inline (Char_Literal_Value); + pragma Inline (Chars); + pragma Inline (Check_Address_Alignment); + pragma Inline (Choice_Parameter); + pragma Inline (Choices); + pragma Inline (Coextensions); + pragma Inline (Comes_From_Extended_Return_Statement); + pragma Inline (Compile_Time_Known_Aggregate); + pragma Inline (Component_Associations); + pragma Inline (Component_Clauses); + pragma Inline (Component_Definition); + pragma Inline (Component_Items); + pragma Inline (Component_List); + pragma Inline (Component_Name); + pragma Inline (Condition); + pragma Inline (Condition_Actions); + pragma Inline (Config_Pragmas); + pragma Inline (Constant_Present); + pragma Inline (Constraint); + pragma Inline (Constraints); + pragma Inline (Context_Installed); + pragma Inline (Context_Items); + pragma Inline (Controlling_Argument); + pragma Inline (Conversion_OK); + pragma Inline (Corresponding_Body); + pragma Inline (Corresponding_Formal_Spec); + pragma Inline (Corresponding_Generic_Association); + pragma Inline (Corresponding_Integer_Value); + pragma Inline (Corresponding_Spec); + pragma Inline (Corresponding_Stub); + pragma Inline (Dcheck_Function); + pragma Inline (Debug_Statement); + pragma Inline (Declarations); + pragma Inline (Default_Expression); + pragma Inline (Default_Name); + pragma Inline (Defining_Identifier); + pragma Inline (Defining_Unit_Name); + pragma Inline (Delay_Alternative); + pragma Inline (Delay_Statement); + pragma Inline (Delta_Expression); + pragma Inline (Digits_Expression); + pragma Inline (Discr_Check_Funcs_Built); + pragma Inline (Discrete_Choices); + pragma Inline (Discrete_Range); + pragma Inline (Discrete_Subtype_Definition); + pragma Inline (Discrete_Subtype_Definitions); + pragma Inline (Discriminant_Specifications); + pragma Inline (Discriminant_Type); + pragma Inline (Do_Accessibility_Check); + pragma Inline (Do_Discriminant_Check); + pragma Inline (Do_Length_Check); + pragma Inline (Do_Division_Check); + pragma Inline (Do_Overflow_Check); + pragma Inline (Do_Range_Check); + pragma Inline (Do_Storage_Check); + pragma Inline (Do_Tag_Check); + pragma Inline (Elaborate_Present); + pragma Inline (Elaborate_All_Desirable); + pragma Inline (Elaborate_All_Present); + pragma Inline (Elaborate_Desirable); + pragma Inline (Elaboration_Boolean); + pragma Inline (Else_Actions); + pragma Inline (Else_Statements); + pragma Inline (Elsif_Parts); + pragma Inline (Enclosing_Variant); + pragma Inline (End_Label); + pragma Inline (End_Span); + pragma Inline (Entity); + pragma Inline (Entity_Or_Associated_Node); + pragma Inline (Entry_Body_Formal_Part); + pragma Inline (Entry_Call_Alternative); + pragma Inline (Entry_Call_Statement); + pragma Inline (Entry_Direct_Name); + pragma Inline (Entry_Index); + pragma Inline (Entry_Index_Specification); + pragma Inline (Etype); + pragma Inline (Exception_Choices); + pragma Inline (Exception_Handlers); + pragma Inline (Exception_Junk); + pragma Inline (Exception_Label); + pragma Inline (Expansion_Delayed); + pragma Inline (Explicit_Actual_Parameter); + pragma Inline (Explicit_Generic_Actual_Parameter); + pragma Inline (Expression); + pragma Inline (Expressions); + pragma Inline (First_Bit); + pragma Inline (First_Inlined_Subprogram); + pragma Inline (First_Name); + pragma Inline (First_Named_Actual); + pragma Inline (First_Real_Statement); + pragma Inline (First_Subtype_Link); + pragma Inline (Float_Truncate); + pragma Inline (Formal_Type_Definition); + pragma Inline (Forwards_OK); + pragma Inline (From_At_End); + pragma Inline (From_At_Mod); + pragma Inline (From_Default); + pragma Inline (Generic_Associations); + pragma Inline (Generic_Formal_Declarations); + pragma Inline (Generic_Parent); + pragma Inline (Generic_Parent_Type); + pragma Inline (Handled_Statement_Sequence); + pragma Inline (Handler_List_Entry); + pragma Inline (Has_Created_Identifier); + pragma Inline (Has_Dynamic_Length_Check); + pragma Inline (Has_Dynamic_Range_Check); + pragma Inline (Has_Init_Expression); + pragma Inline (Has_Local_Raise); + pragma Inline (Has_Self_Reference); + pragma Inline (Has_No_Elaboration_Code); + pragma Inline (Has_Priority_Pragma); + pragma Inline (Has_Private_View); + pragma Inline (Has_Relative_Deadline_Pragma); + pragma Inline (Has_Storage_Size_Pragma); + pragma Inline (Has_Task_Info_Pragma); + pragma Inline (Has_Task_Name_Pragma); + pragma Inline (Has_Wide_Character); + pragma Inline (Hidden_By_Use_Clause); + pragma Inline (High_Bound); + pragma Inline (Identifier); + pragma Inline (Implicit_With); + pragma Inline (Interface_List); + pragma Inline (Interface_Present); + pragma Inline (Includes_Infinities); + pragma Inline (In_Present); + pragma Inline (Instance_Spec); + pragma Inline (Intval); + pragma Inline (Is_Asynchronous_Call_Block); + pragma Inline (Is_Component_Left_Opnd); + pragma Inline (Is_Component_Right_Opnd); + pragma Inline (Is_Controlling_Actual); + pragma Inline (Is_Dynamic_Coextension); + pragma Inline (Is_Entry_Barrier_Function); + pragma Inline (Is_Expanded_Build_In_Place_Call); + pragma Inline (Is_Folded_In_Parser); + pragma Inline (Is_In_Discriminant_Check); + pragma Inline (Is_Machine_Number); + pragma Inline (Is_Null_Loop); + pragma Inline (Is_Overloaded); + pragma Inline (Is_Power_Of_2_For_Shift); + pragma Inline (Is_Protected_Subprogram_Body); + pragma Inline (Is_Static_Coextension); + pragma Inline (Is_Static_Expression); + pragma Inline (Is_Subprogram_Descriptor); + pragma Inline (Is_Task_Allocation_Block); + pragma Inline (Is_Task_Master); + pragma Inline (Iteration_Scheme); + pragma Inline (Itype); + pragma Inline (Kill_Range_Check); + pragma Inline (Last_Bit); + pragma Inline (Last_Name); + pragma Inline (Library_Unit); + pragma Inline (Label_Construct); + pragma Inline (Left_Opnd); + pragma Inline (Limited_View_Installed); + pragma Inline (Limited_Present); + pragma Inline (Literals); + pragma Inline (Local_Raise_Not_OK); + pragma Inline (Local_Raise_Statements); + pragma Inline (Loop_Actions); + pragma Inline (Loop_Parameter_Specification); + pragma Inline (Low_Bound); + pragma Inline (Mod_Clause); + pragma Inline (More_Ids); + pragma Inline (Must_Be_Byte_Aligned); + pragma Inline (Must_Not_Freeze); + pragma Inline (Must_Not_Override); + pragma Inline (Must_Override); + pragma Inline (Name); + pragma Inline (Names); + pragma Inline (Next_Entity); + pragma Inline (Next_Named_Actual); + pragma Inline (Next_Pragma); + pragma Inline (Next_Rep_Item); + pragma Inline (Next_Use_Clause); + pragma Inline (No_Ctrl_Actions); + pragma Inline (No_Elaboration_Check); + pragma Inline (No_Entities_Ref_In_Spec); + pragma Inline (No_Initialization); + pragma Inline (No_Truncation); + pragma Inline (Null_Present); + pragma Inline (Null_Exclusion_Present); + pragma Inline (Null_Record_Present); + pragma Inline (Object_Definition); + pragma Inline (Original_Discriminant); + pragma Inline (Original_Entity); + pragma Inline (Others_Discrete_Choices); + pragma Inline (Out_Present); + pragma Inline (Parameter_Associations); + pragma Inline (Parameter_Specifications); + pragma Inline (Parameter_List_Truncated); + pragma Inline (Parameter_Type); + pragma Inline (Parent_Spec); + pragma Inline (PPC_Enabled); + pragma Inline (Position); + pragma Inline (Pragma_Argument_Associations); + pragma Inline (Pragma_Identifier); + pragma Inline (Pragmas_After); + pragma Inline (Pragmas_Before); + pragma Inline (Prefix); + pragma Inline (Present_Expr); + pragma Inline (Prev_Ids); + pragma Inline (Print_In_Hex); + pragma Inline (Private_Declarations); + pragma Inline (Private_Present); + pragma Inline (Procedure_To_Call); + pragma Inline (Proper_Body); + pragma Inline (Protected_Definition); + pragma Inline (Protected_Present); + pragma Inline (Raises_Constraint_Error); + pragma Inline (Range_Constraint); + pragma Inline (Range_Expression); + pragma Inline (Real_Range_Specification); + pragma Inline (Realval); + pragma Inline (Reason); + pragma Inline (Record_Extension_Part); + pragma Inline (Redundant_Use); + pragma Inline (Renaming_Exception); + pragma Inline (Result_Definition); + pragma Inline (Return_Object_Declarations); + pragma Inline (Return_Statement_Entity); + pragma Inline (Reverse_Present); + pragma Inline (Right_Opnd); + pragma Inline (Rounded_Result); + pragma Inline (Scope); + pragma Inline (Select_Alternatives); + pragma Inline (Selector_Name); + pragma Inline (Selector_Names); + pragma Inline (Shift_Count_OK); + pragma Inline (Source_Type); + pragma Inline (Specification); + pragma Inline (Statements); + pragma Inline (Static_Processing_OK); + pragma Inline (Storage_Pool); + pragma Inline (Strval); + pragma Inline (Subtype_Indication); + pragma Inline (Subtype_Mark); + pragma Inline (Subtype_Marks); + pragma Inline (Synchronized_Present); + pragma Inline (Tagged_Present); + pragma Inline (Target_Type); + pragma Inline (Task_Definition); + pragma Inline (Task_Present); + pragma Inline (Then_Actions); + pragma Inline (Then_Statements); + pragma Inline (Triggering_Alternative); + pragma Inline (Triggering_Statement); + pragma Inline (Treat_Fixed_As_Integer); + pragma Inline (TSS_Elist); + pragma Inline (Type_Definition); + pragma Inline (Unit); + pragma Inline (Unknown_Discriminants_Present); + pragma Inline (Unreferenced_In_Spec); + pragma Inline (Variant_Part); + pragma Inline (Variants); + pragma Inline (Visible_Declarations); + pragma Inline (Was_Originally_Stub); + pragma Inline (Zero_Cost_Handling); + + pragma Inline (Set_ABE_Is_Certain); + pragma Inline (Set_Abort_Present); + pragma Inline (Set_Abortable_Part); + pragma Inline (Set_Abstract_Present); + pragma Inline (Set_Accept_Handler_Records); + pragma Inline (Set_Accept_Statement); + pragma Inline (Set_Access_Definition); + pragma Inline (Set_Access_To_Subprogram_Definition); + pragma Inline (Set_Access_Types_To_Process); + pragma Inline (Set_Actions); + pragma Inline (Set_Activation_Chain_Entity); + pragma Inline (Set_Acts_As_Spec); + pragma Inline (Set_Actual_Designated_Subtype); + pragma Inline (Set_Address_Warning_Posted); + pragma Inline (Set_Aggregate_Bounds); + pragma Inline (Set_Aliased_Present); + pragma Inline (Set_All_Others); + pragma Inline (Set_All_Present); + pragma Inline (Set_Alternatives); + pragma Inline (Set_Ancestor_Part); + pragma Inline (Set_Array_Aggregate); + pragma Inline (Set_Assignment_OK); + pragma Inline (Set_Associated_Node); + pragma Inline (Set_At_End_Proc); + pragma Inline (Set_Attribute_Name); + pragma Inline (Set_Aux_Decls_Node); + pragma Inline (Set_Backwards_OK); + pragma Inline (Set_Bad_Is_Detected); + pragma Inline (Set_Body_To_Inline); + pragma Inline (Set_Body_Required); + pragma Inline (Set_By_Ref); + pragma Inline (Set_Box_Present); + pragma Inline (Set_Char_Literal_Value); + pragma Inline (Set_Chars); + pragma Inline (Set_Check_Address_Alignment); + pragma Inline (Set_Choice_Parameter); + pragma Inline (Set_Choices); + pragma Inline (Set_Coextensions); + pragma Inline (Set_Comes_From_Extended_Return_Statement); + pragma Inline (Set_Compile_Time_Known_Aggregate); + pragma Inline (Set_Component_Associations); + pragma Inline (Set_Component_Clauses); + pragma Inline (Set_Component_Definition); + pragma Inline (Set_Component_Items); + pragma Inline (Set_Component_List); + pragma Inline (Set_Component_Name); + pragma Inline (Set_Condition); + pragma Inline (Set_Condition_Actions); + pragma Inline (Set_Config_Pragmas); + pragma Inline (Set_Constant_Present); + pragma Inline (Set_Constraint); + pragma Inline (Set_Constraints); + pragma Inline (Set_Context_Installed); + pragma Inline (Set_Context_Items); + pragma Inline (Set_Controlling_Argument); + pragma Inline (Set_Conversion_OK); + pragma Inline (Set_Corresponding_Body); + pragma Inline (Set_Corresponding_Formal_Spec); + pragma Inline (Set_Corresponding_Generic_Association); + pragma Inline (Set_Corresponding_Integer_Value); + pragma Inline (Set_Corresponding_Spec); + pragma Inline (Set_Corresponding_Stub); + pragma Inline (Set_Dcheck_Function); + pragma Inline (Set_Debug_Statement); + pragma Inline (Set_Declarations); + pragma Inline (Set_Default_Expression); + pragma Inline (Set_Default_Name); + pragma Inline (Set_Defining_Identifier); + pragma Inline (Set_Defining_Unit_Name); + pragma Inline (Set_Delay_Alternative); + pragma Inline (Set_Delay_Statement); + pragma Inline (Set_Delta_Expression); + pragma Inline (Set_Digits_Expression); + pragma Inline (Set_Discr_Check_Funcs_Built); + pragma Inline (Set_Discrete_Choices); + pragma Inline (Set_Discrete_Range); + pragma Inline (Set_Discrete_Subtype_Definition); + pragma Inline (Set_Discrete_Subtype_Definitions); + pragma Inline (Set_Discriminant_Specifications); + pragma Inline (Set_Discriminant_Type); + pragma Inline (Set_Do_Accessibility_Check); + pragma Inline (Set_Do_Discriminant_Check); + pragma Inline (Set_Do_Length_Check); + pragma Inline (Set_Do_Division_Check); + pragma Inline (Set_Do_Overflow_Check); + pragma Inline (Set_Do_Range_Check); + pragma Inline (Set_Do_Storage_Check); + pragma Inline (Set_Do_Tag_Check); + pragma Inline (Set_Elaborate_Present); + pragma Inline (Set_Elaborate_All_Desirable); + pragma Inline (Set_Elaborate_All_Present); + pragma Inline (Set_Elaborate_Desirable); + pragma Inline (Set_Elaboration_Boolean); + pragma Inline (Set_Else_Actions); + pragma Inline (Set_Else_Statements); + pragma Inline (Set_Elsif_Parts); + pragma Inline (Set_Enclosing_Variant); + pragma Inline (Set_End_Label); + pragma Inline (Set_End_Span); + pragma Inline (Set_Entity); + pragma Inline (Set_Entry_Body_Formal_Part); + pragma Inline (Set_Entry_Call_Alternative); + pragma Inline (Set_Entry_Call_Statement); + pragma Inline (Set_Entry_Direct_Name); + pragma Inline (Set_Entry_Index); + pragma Inline (Set_Entry_Index_Specification); + pragma Inline (Set_Etype); + pragma Inline (Set_Exception_Choices); + pragma Inline (Set_Exception_Handlers); + pragma Inline (Set_Exception_Junk); + pragma Inline (Set_Exception_Label); + pragma Inline (Set_Expansion_Delayed); + pragma Inline (Set_Explicit_Actual_Parameter); + pragma Inline (Set_Explicit_Generic_Actual_Parameter); + pragma Inline (Set_Expression); + pragma Inline (Set_Expressions); + pragma Inline (Set_First_Bit); + pragma Inline (Set_First_Inlined_Subprogram); + pragma Inline (Set_First_Name); + pragma Inline (Set_First_Named_Actual); + pragma Inline (Set_First_Real_Statement); + pragma Inline (Set_First_Subtype_Link); + pragma Inline (Set_Float_Truncate); + pragma Inline (Set_Formal_Type_Definition); + pragma Inline (Set_Forwards_OK); + pragma Inline (Set_From_At_End); + pragma Inline (Set_From_At_Mod); + pragma Inline (Set_From_Default); + pragma Inline (Set_Generic_Associations); + pragma Inline (Set_Generic_Formal_Declarations); + pragma Inline (Set_Generic_Parent); + pragma Inline (Set_Generic_Parent_Type); + pragma Inline (Set_Handled_Statement_Sequence); + pragma Inline (Set_Handler_List_Entry); + pragma Inline (Set_Has_Created_Identifier); + pragma Inline (Set_Has_Dynamic_Length_Check); + pragma Inline (Set_Has_Init_Expression); + pragma Inline (Set_Has_Local_Raise); + pragma Inline (Set_Has_Dynamic_Range_Check); + pragma Inline (Set_Has_No_Elaboration_Code); + pragma Inline (Set_Has_Priority_Pragma); + pragma Inline (Set_Has_Private_View); + pragma Inline (Set_Has_Relative_Deadline_Pragma); + pragma Inline (Set_Has_Storage_Size_Pragma); + pragma Inline (Set_Has_Task_Info_Pragma); + pragma Inline (Set_Has_Task_Name_Pragma); + pragma Inline (Set_Has_Wide_Character); + pragma Inline (Set_Hidden_By_Use_Clause); + pragma Inline (Set_High_Bound); + pragma Inline (Set_Identifier); + pragma Inline (Set_Implicit_With); + pragma Inline (Set_Includes_Infinities); + pragma Inline (Set_Interface_List); + pragma Inline (Set_Interface_Present); + pragma Inline (Set_In_Present); + pragma Inline (Set_Instance_Spec); + pragma Inline (Set_Intval); + pragma Inline (Set_Is_Asynchronous_Call_Block); + pragma Inline (Set_Is_Component_Left_Opnd); + pragma Inline (Set_Is_Component_Right_Opnd); + pragma Inline (Set_Is_Controlling_Actual); + pragma Inline (Set_Is_Dynamic_Coextension); + pragma Inline (Set_Is_Entry_Barrier_Function); + pragma Inline (Set_Is_Expanded_Build_In_Place_Call); + pragma Inline (Set_Is_Folded_In_Parser); + pragma Inline (Set_Is_In_Discriminant_Check); + pragma Inline (Set_Is_Machine_Number); + pragma Inline (Set_Is_Null_Loop); + pragma Inline (Set_Is_Overloaded); + pragma Inline (Set_Is_Power_Of_2_For_Shift); + pragma Inline (Set_Is_Protected_Subprogram_Body); + pragma Inline (Set_Has_Self_Reference); + pragma Inline (Set_Is_Static_Coextension); + pragma Inline (Set_Is_Static_Expression); + pragma Inline (Set_Is_Subprogram_Descriptor); + pragma Inline (Set_Is_Task_Allocation_Block); + pragma Inline (Set_Is_Task_Master); + pragma Inline (Set_Iteration_Scheme); + pragma Inline (Set_Itype); + pragma Inline (Set_Kill_Range_Check); + pragma Inline (Set_Last_Bit); + pragma Inline (Set_Last_Name); + pragma Inline (Set_Library_Unit); + pragma Inline (Set_Label_Construct); + pragma Inline (Set_Left_Opnd); + pragma Inline (Set_Limited_View_Installed); + pragma Inline (Set_Limited_Present); + pragma Inline (Set_Literals); + pragma Inline (Set_Local_Raise_Not_OK); + pragma Inline (Set_Local_Raise_Statements); + pragma Inline (Set_Loop_Actions); + pragma Inline (Set_Loop_Parameter_Specification); + pragma Inline (Set_Low_Bound); + pragma Inline (Set_Mod_Clause); + pragma Inline (Set_More_Ids); + pragma Inline (Set_Must_Be_Byte_Aligned); + pragma Inline (Set_Must_Not_Freeze); + pragma Inline (Set_Must_Not_Override); + pragma Inline (Set_Must_Override); + pragma Inline (Set_Name); + pragma Inline (Set_Names); + pragma Inline (Set_Next_Entity); + pragma Inline (Set_Next_Named_Actual); + pragma Inline (Set_Next_Pragma); + pragma Inline (Set_Next_Rep_Item); + pragma Inline (Set_Next_Use_Clause); + pragma Inline (Set_No_Ctrl_Actions); + pragma Inline (Set_No_Elaboration_Check); + pragma Inline (Set_No_Entities_Ref_In_Spec); + pragma Inline (Set_No_Initialization); + pragma Inline (Set_No_Truncation); + pragma Inline (Set_Null_Present); + pragma Inline (Set_Null_Exclusion_Present); + pragma Inline (Set_Null_Record_Present); + pragma Inline (Set_Object_Definition); + pragma Inline (Set_Original_Discriminant); + pragma Inline (Set_Original_Entity); + pragma Inline (Set_Others_Discrete_Choices); + pragma Inline (Set_Out_Present); + pragma Inline (Set_Parameter_Associations); + pragma Inline (Set_Parameter_Specifications); + pragma Inline (Set_Parameter_List_Truncated); + pragma Inline (Set_Parameter_Type); + pragma Inline (Set_Parent_Spec); + pragma Inline (Set_PPC_Enabled); + pragma Inline (Set_Position); + pragma Inline (Set_Pragma_Argument_Associations); + pragma Inline (Set_Pragma_Identifier); + pragma Inline (Set_Pragmas_After); + pragma Inline (Set_Pragmas_Before); + pragma Inline (Set_Prefix); + pragma Inline (Set_Present_Expr); + pragma Inline (Set_Prev_Ids); + pragma Inline (Set_Print_In_Hex); + pragma Inline (Set_Private_Declarations); + pragma Inline (Set_Private_Present); + pragma Inline (Set_Procedure_To_Call); + pragma Inline (Set_Proper_Body); + pragma Inline (Set_Protected_Definition); + pragma Inline (Set_Protected_Present); + pragma Inline (Set_Raises_Constraint_Error); + pragma Inline (Set_Range_Constraint); + pragma Inline (Set_Range_Expression); + pragma Inline (Set_Real_Range_Specification); + pragma Inline (Set_Realval); + pragma Inline (Set_Reason); + pragma Inline (Set_Record_Extension_Part); + pragma Inline (Set_Redundant_Use); + pragma Inline (Set_Renaming_Exception); + pragma Inline (Set_Result_Definition); + pragma Inline (Set_Return_Object_Declarations); + pragma Inline (Set_Reverse_Present); + pragma Inline (Set_Right_Opnd); + pragma Inline (Set_Rounded_Result); + pragma Inline (Set_Scope); + pragma Inline (Set_Select_Alternatives); + pragma Inline (Set_Selector_Name); + pragma Inline (Set_Selector_Names); + pragma Inline (Set_Shift_Count_OK); + pragma Inline (Set_Source_Type); + pragma Inline (Set_Specification); + pragma Inline (Set_Statements); + pragma Inline (Set_Static_Processing_OK); + pragma Inline (Set_Storage_Pool); + pragma Inline (Set_Strval); + pragma Inline (Set_Subtype_Indication); + pragma Inline (Set_Subtype_Mark); + pragma Inline (Set_Subtype_Marks); + pragma Inline (Set_Synchronized_Present); + pragma Inline (Set_Tagged_Present); + pragma Inline (Set_Target_Type); + pragma Inline (Set_Task_Definition); + pragma Inline (Set_Task_Present); + pragma Inline (Set_Then_Actions); + pragma Inline (Set_Then_Statements); + pragma Inline (Set_Triggering_Alternative); + pragma Inline (Set_Triggering_Statement); + pragma Inline (Set_Treat_Fixed_As_Integer); + pragma Inline (Set_TSS_Elist); + pragma Inline (Set_Type_Definition); + pragma Inline (Set_Unit); + pragma Inline (Set_Unknown_Discriminants_Present); + pragma Inline (Set_Unreferenced_In_Spec); + pragma Inline (Set_Variant_Part); + pragma Inline (Set_Variants); + pragma Inline (Set_Visible_Declarations); + pragma Inline (Set_Was_Originally_Stub); + pragma Inline (Set_Zero_Cost_Handling); + + N_Simple_Return_Statement : constant Node_Kind := N_Return_Statement; + -- Rename N_Return_Statement to be N_Simple_Return_Statement. Clients + -- should refer to N_Simple_Return_Statement. + +end Sinfo; |