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diff --git a/gcc-4.4.0/gcc/ada/sem_prag.adb b/gcc-4.4.0/gcc/ada/sem_prag.adb new file mode 100644 index 000000000..065cb9701 --- /dev/null +++ b/gcc-4.4.0/gcc/ada/sem_prag.adb @@ -0,0 +1,12690 @@ +------------------------------------------------------------------------------ +-- -- +-- GNAT COMPILER COMPONENTS -- +-- -- +-- S E M _ P R A G -- +-- -- +-- B o d y -- +-- -- +-- Copyright (C) 1992-2008, 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. See the GNU General Public License -- +-- for more details. You should have received a copy of the GNU General -- +-- Public License distributed with GNAT; see file COPYING3. If not, go to -- +-- http://www.gnu.org/licenses for a complete copy of the license. -- +-- -- +-- GNAT was originally developed by the GNAT team at New York University. -- +-- Extensive contributions were provided by Ada Core Technologies Inc. -- +-- -- +------------------------------------------------------------------------------ + +-- This unit contains the semantic processing for all pragmas, both language +-- and implementation defined. For most pragmas, the parser only does the +-- most basic job of checking the syntax, so Sem_Prag also contains the code +-- to complete the syntax checks. Certain pragmas are handled partially or +-- completely by the parser (see Par.Prag for further details). + +with Atree; use Atree; +with Casing; use Casing; +with Checks; use Checks; +with Csets; use Csets; +with Debug; use Debug; +with Einfo; use Einfo; +with Errout; use Errout; +with Exp_Dist; use Exp_Dist; +with Lib; use Lib; +with Lib.Writ; use Lib.Writ; +with Lib.Xref; use Lib.Xref; +with Namet.Sp; use Namet.Sp; +with Nlists; use Nlists; +with Nmake; use Nmake; +with Opt; use Opt; +with Output; use Output; +with Restrict; use Restrict; +with Rident; use Rident; +with Rtsfind; use Rtsfind; +with Sem; use Sem; +with Sem_Aux; use Sem_Aux; +with Sem_Ch3; use Sem_Ch3; +with Sem_Ch6; use Sem_Ch6; +with Sem_Ch8; use Sem_Ch8; +with Sem_Ch12; use Sem_Ch12; +with Sem_Ch13; use Sem_Ch13; +with Sem_Dist; use Sem_Dist; +with Sem_Elim; use Sem_Elim; +with Sem_Eval; use Sem_Eval; +with Sem_Intr; use Sem_Intr; +with Sem_Mech; use Sem_Mech; +with Sem_Res; use Sem_Res; +with Sem_Type; use Sem_Type; +with Sem_Util; use Sem_Util; +with Sem_VFpt; use Sem_VFpt; +with Sem_Warn; use Sem_Warn; +with Stand; use Stand; +with Sinfo; use Sinfo; +with Sinfo.CN; use Sinfo.CN; +with Sinput; use Sinput; +with Snames; use Snames; +with Stringt; use Stringt; +with Stylesw; use Stylesw; +with Table; +with Targparm; use Targparm; +with Tbuild; use Tbuild; +with Ttypes; +with Uintp; use Uintp; +with Uname; use Uname; +with Urealp; use Urealp; +with Validsw; use Validsw; + +package body Sem_Prag is + + ---------------------------------------------- + -- Common Handling of Import-Export Pragmas -- + ---------------------------------------------- + + -- In the following section, a number of Import_xxx and Export_xxx + -- pragmas are defined by GNAT. These are compatible with the DEC + -- pragmas of the same name, and all have the following common + -- form and processing: + + -- pragma Export_xxx + -- [Internal =>] LOCAL_NAME + -- [, [External =>] EXTERNAL_SYMBOL] + -- [, other optional parameters ]); + + -- pragma Import_xxx + -- [Internal =>] LOCAL_NAME + -- [, [External =>] EXTERNAL_SYMBOL] + -- [, other optional parameters ]); + + -- EXTERNAL_SYMBOL ::= + -- IDENTIFIER + -- | static_string_EXPRESSION + + -- The internal LOCAL_NAME designates the entity that is imported or + -- exported, and must refer to an entity in the current declarative + -- part (as required by the rules for LOCAL_NAME). + + -- The external linker name is designated by the External parameter + -- if given, or the Internal parameter if not (if there is no External + -- parameter, the External parameter is a copy of the Internal name). + + -- If the External parameter is given as a string, then this string + -- is treated as an external name (exactly as though it had been given + -- as an External_Name parameter for a normal Import pragma). + + -- If the External parameter is given as an identifier (or there is no + -- External parameter, so that the Internal identifier is used), then + -- the external name is the characters of the identifier, translated + -- to all upper case letters for OpenVMS versions of GNAT, and to all + -- lower case letters for all other versions + + -- Note: the external name specified or implied by any of these special + -- Import_xxx or Export_xxx pragmas override an external or link name + -- specified in a previous Import or Export pragma. + + -- Note: these and all other DEC-compatible GNAT pragmas allow full + -- use of named notation, following the standard rules for subprogram + -- calls, i.e. parameters can be given in any order if named notation + -- is used, and positional and named notation can be mixed, subject to + -- the rule that all positional parameters must appear first. + + -- Note: All these pragmas are implemented exactly following the DEC + -- design and implementation and are intended to be fully compatible + -- with the use of these pragmas in the DEC Ada compiler. + + -------------------------------------------- + -- Checking for Duplicated External Names -- + -------------------------------------------- + + -- It is suspicious if two separate Export pragmas use the same external + -- name. The following table is used to diagnose this situation so that + -- an appropriate warning can be issued. + + -- The Node_Id stored is for the N_String_Literal node created to + -- hold the value of the external name. The Sloc of this node is + -- used to cross-reference the location of the duplication. + + package Externals is new Table.Table ( + Table_Component_Type => Node_Id, + Table_Index_Type => Int, + Table_Low_Bound => 0, + Table_Initial => 100, + Table_Increment => 100, + Table_Name => "Name_Externals"); + + ------------------------------------- + -- Local Subprograms and Variables -- + ------------------------------------- + + function Adjust_External_Name_Case (N : Node_Id) return Node_Id; + -- This routine is used for possible casing adjustment of an explicit + -- external name supplied as a string literal (the node N), according + -- to the casing requirement of Opt.External_Name_Casing. If this is + -- set to As_Is, then the string literal is returned unchanged, but if + -- it is set to Uppercase or Lowercase, then a new string literal with + -- appropriate casing is constructed. + + function Get_Base_Subprogram (Def_Id : Entity_Id) return Entity_Id; + -- If Def_Id refers to a renamed subprogram, then the base subprogram + -- (the original one, following the renaming chain) is returned. + -- Otherwise the entity is returned unchanged. Should be in Einfo??? + + function Get_Pragma_Arg (Arg : Node_Id) return Node_Id; + -- All the routines that check pragma arguments take either a pragma + -- argument association (in which case the expression of the argument + -- association is checked), or the expression directly. The function + -- Get_Pragma_Arg is a utility used to deal with these two cases. If Arg + -- is a pragma argument association node, then its expression is returned, + -- otherwise Arg is returned unchanged. + + procedure rv; + -- This is a dummy function called by the processing for pragma Reviewable. + -- It is there for assisting front end debugging. By placing a Reviewable + -- pragma in the source program, a breakpoint on rv catches this place in + -- the source, allowing convenient stepping to the point of interest. + + procedure Set_Unit_Name (N : Node_Id; With_Item : Node_Id); + -- Place semantic information on the argument of an Elaborate or + -- Elaborate_All pragma. Entity name for unit and its parents is + -- taken from item in previous with_clause that mentions the unit. + + ------------------------------- + -- Adjust_External_Name_Case -- + ------------------------------- + + function Adjust_External_Name_Case (N : Node_Id) return Node_Id is + CC : Char_Code; + + begin + -- Adjust case of literal if required + + if Opt.External_Name_Exp_Casing = As_Is then + return N; + + else + -- Copy existing string + + Start_String; + + -- Set proper casing + + for J in 1 .. String_Length (Strval (N)) loop + CC := Get_String_Char (Strval (N), J); + + if Opt.External_Name_Exp_Casing = Uppercase + and then CC >= Get_Char_Code ('a') + and then CC <= Get_Char_Code ('z') + then + Store_String_Char (CC - 32); + + elsif Opt.External_Name_Exp_Casing = Lowercase + and then CC >= Get_Char_Code ('A') + and then CC <= Get_Char_Code ('Z') + then + Store_String_Char (CC + 32); + + else + Store_String_Char (CC); + end if; + end loop; + + return + Make_String_Literal (Sloc (N), + Strval => End_String); + end if; + end Adjust_External_Name_Case; + + ------------------------------ + -- Analyze_PPC_In_Decl_Part -- + ------------------------------ + + procedure Analyze_PPC_In_Decl_Part (N : Node_Id; S : Entity_Id) is + Arg1 : constant Node_Id := + First (Pragma_Argument_Associations (N)); + Arg2 : constant Node_Id := Next (Arg1); + + begin + -- Install formals and push subprogram spec onto scope stack + -- so that we can see the formals from the pragma. + + Install_Formals (S); + Push_Scope (S); + + -- Preanalyze the boolean expression, we treat this as a + -- spec expression (i.e. similar to a default expression). + + Preanalyze_Spec_Expression + (Get_Pragma_Arg (Arg1), Standard_Boolean); + + -- If there is a message argument, analyze it the same way + + if Present (Arg2) then + Preanalyze_Spec_Expression + (Get_Pragma_Arg (Arg2), Standard_String); + end if; + + -- Remove the subprogram from the scope stack now that the + -- pre-analysis of the precondition/postcondition is done. + + End_Scope; + end Analyze_PPC_In_Decl_Part; + + -------------------- + -- Analyze_Pragma -- + -------------------- + + procedure Analyze_Pragma (N : Node_Id) is + Loc : constant Source_Ptr := Sloc (N); + Pname : constant Name_Id := Pragma_Name (N); + Prag_Id : Pragma_Id; + + Pragma_Exit : exception; + -- This exception is used to exit pragma processing completely. It + -- is used when an error is detected, and no further processing is + -- required. It is also used if an earlier error has left the tree + -- in a state where the pragma should not be processed. + + Arg_Count : Nat; + -- Number of pragma argument associations + + Arg1 : Node_Id; + Arg2 : Node_Id; + Arg3 : Node_Id; + Arg4 : Node_Id; + -- First four pragma arguments (pragma argument association nodes, + -- or Empty if the corresponding argument does not exist). + + type Name_List is array (Natural range <>) of Name_Id; + type Args_List is array (Natural range <>) of Node_Id; + -- Types used for arguments to Check_Arg_Order and Gather_Associations + + procedure Ada_2005_Pragma; + -- Called for pragmas defined in Ada 2005, that are not in Ada 95. In + -- Ada 95 mode, these are implementation defined pragmas, so should be + -- caught by the No_Implementation_Pragmas restriction + + procedure Check_Ada_83_Warning; + -- Issues a warning message for the current pragma if operating in Ada + -- 83 mode (used for language pragmas that are not a standard part of + -- Ada 83). This procedure does not raise Error_Pragma. Also notes use + -- of 95 pragma. + + procedure Check_Arg_Count (Required : Nat); + -- Check argument count for pragma is equal to given parameter. + -- If not, then issue an error message and raise Pragma_Exit. + + -- Note: all routines whose name is Check_Arg_Is_xxx take an + -- argument Arg which can either be a pragma argument association, + -- in which case the check is applied to the expression of the + -- association or an expression directly. + + procedure Check_Arg_Is_External_Name (Arg : Node_Id); + -- Check that an argument has the right form for an EXTERNAL_NAME + -- parameter of an extended import/export pragma. The rule is that + -- the name must be an identifier or string literal (in Ada 83 mode) + -- or a static string expression (in Ada 95 mode). + + procedure Check_Arg_Is_Identifier (Arg : Node_Id); + -- Check the specified argument Arg to make sure that it is an + -- identifier. If not give error and raise Pragma_Exit. + + procedure Check_Arg_Is_Integer_Literal (Arg : Node_Id); + -- Check the specified argument Arg to make sure that it is an + -- integer literal. If not give error and raise Pragma_Exit. + + procedure Check_Arg_Is_Library_Level_Local_Name (Arg : Node_Id); + -- Check the specified argument Arg to make sure that it has the + -- proper syntactic form for a local name and meets the semantic + -- requirements for a local name. The local name is analyzed as + -- part of the processing for this call. In addition, the local + -- name is required to represent an entity at the library level. + + procedure Check_Arg_Is_Local_Name (Arg : Node_Id); + -- Check the specified argument Arg to make sure that it has the + -- proper syntactic form for a local name and meets the semantic + -- requirements for a local name. The local name is analyzed as + -- part of the processing for this call. + + procedure Check_Arg_Is_Locking_Policy (Arg : Node_Id); + -- Check the specified argument Arg to make sure that it is a valid + -- locking policy name. If not give error and raise Pragma_Exit. + + procedure Check_Arg_Is_One_Of (Arg : Node_Id; N1, N2 : Name_Id); + procedure Check_Arg_Is_One_Of (Arg : Node_Id; N1, N2, N3 : Name_Id); + procedure Check_Arg_Is_One_Of (Arg : Node_Id; N1, N2, N3, N4 : Name_Id); + -- Check the specified argument Arg to make sure that it is an + -- identifier whose name matches either N1 or N2 (or N3 if present). + -- If not then give error and raise Pragma_Exit. + + procedure Check_Arg_Is_Queuing_Policy (Arg : Node_Id); + -- Check the specified argument Arg to make sure that it is a valid + -- queuing policy name. If not give error and raise Pragma_Exit. + + procedure Check_Arg_Is_Static_Expression + (Arg : Node_Id; + Typ : Entity_Id); + -- Check the specified argument Arg to make sure that it is a static + -- expression of the given type (i.e. it will be analyzed and resolved + -- using this type, which can be any valid argument to Resolve, e.g. + -- Any_Integer is OK). If not, given error and raise Pragma_Exit. + + procedure Check_Arg_Is_String_Literal (Arg : Node_Id); + -- Check the specified argument Arg to make sure that it is a + -- string literal. If not give error and raise Pragma_Exit + + procedure Check_Arg_Is_Task_Dispatching_Policy (Arg : Node_Id); + -- Check the specified argument Arg to make sure that it is a valid + -- valid task dispatching policy name. If not give error and raise + -- Pragma_Exit. + + procedure Check_Arg_Order (Names : Name_List); + -- Checks for an instance of two arguments with identifiers for the + -- current pragma which are not in the sequence indicated by Names, + -- and if so, generates a fatal message about bad order of arguments. + + procedure Check_At_Least_N_Arguments (N : Nat); + -- Check there are at least N arguments present + + procedure Check_At_Most_N_Arguments (N : Nat); + -- Check there are no more than N arguments present + + procedure Check_Component (Comp : Node_Id); + -- Examine Unchecked_Union component for correct use of per-object + -- constrained subtypes, and for restrictions on finalizable components. + + procedure Check_Duplicated_Export_Name (Nam : Node_Id); + -- Nam is an N_String_Literal node containing the external name set + -- by an Import or Export pragma (or extended Import or Export pragma). + -- This procedure checks for possible duplications if this is the + -- export case, and if found, issues an appropriate error message. + + procedure Check_First_Subtype (Arg : Node_Id); + -- Checks that Arg, whose expression is an entity name referencing + -- a subtype, does not reference a type that is not a first subtype. + + procedure Check_In_Main_Program; + -- Common checks for pragmas that appear within a main program + -- (Priority, Main_Storage, Time_Slice, Relative_Deadline). + + procedure Check_Interrupt_Or_Attach_Handler; + -- Common processing for first argument of pragma Interrupt_Handler + -- or pragma Attach_Handler. + + procedure Check_Is_In_Decl_Part_Or_Package_Spec; + -- Check that pragma appears in a declarative part, or in a package + -- specification, i.e. that it does not occur in a statement sequence + -- in a body. + + procedure Check_No_Identifier (Arg : Node_Id); + -- Checks that the given argument does not have an identifier. If + -- an identifier is present, then an error message is issued, and + -- Pragma_Exit is raised. + + procedure Check_No_Identifiers; + -- Checks that none of the arguments to the pragma has an identifier. + -- If any argument has an identifier, then an error message is issued, + -- and Pragma_Exit is raised. + + procedure Check_Optional_Identifier (Arg : Node_Id; Id : Name_Id); + -- Checks if the given argument has an identifier, and if so, requires + -- it to match the given identifier name. If there is a non-matching + -- identifier, then an error message is given and Error_Pragmas raised. + + procedure Check_Optional_Identifier (Arg : Node_Id; Id : String); + -- Checks if the given argument has an identifier, and if so, requires + -- it to match the given identifier name. If there is a non-matching + -- identifier, then an error message is given and Error_Pragmas raised. + -- In this version of the procedure, the identifier name is given as + -- a string with lower case letters. + + procedure Check_Precondition_Postcondition (In_Body : out Boolean); + -- Called to process a precondition or postcondition pragma. There are + -- three cases: + -- + -- The pragma appears after a subprogram spec + -- + -- If the corresponding check is not enabled, the pragma is analyzed + -- but otherwise ignored and control returns with In_Body set False. + -- + -- If the check is enabled, then the first step is to analyze the + -- pragma, but this is skipped if the subprogram spec appears within + -- a package specification (because this is the case where we delay + -- analysis till the end of the spec). Then (whether or not it was + -- analyzed), the pragma is chained to the subprogram in question + -- (using Spec_PPC_List and Next_Pragma) and control returns to the + -- caller with In_Body set False. + -- + -- The pragma appears at the start of subprogram body declarations + -- + -- In this case an immediate return to the caller is made with + -- In_Body set True, and the pragma is NOT analyzed. + -- + -- In all other cases, an error message for bad placement is given + + procedure Check_Static_Constraint (Constr : Node_Id); + -- Constr is a constraint from an N_Subtype_Indication node from a + -- component constraint in an Unchecked_Union type. This routine checks + -- that the constraint is static as required by the restrictions for + -- Unchecked_Union. + + procedure Check_Valid_Configuration_Pragma; + -- Legality checks for placement of a configuration pragma + + procedure Check_Valid_Library_Unit_Pragma; + -- Legality checks for library unit pragmas. A special case arises for + -- pragmas in generic instances that come from copies of the original + -- library unit pragmas in the generic templates. In the case of other + -- than library level instantiations these can appear in contexts which + -- would normally be invalid (they only apply to the original template + -- and to library level instantiations), and they are simply ignored, + -- which is implemented by rewriting them as null statements. + + procedure Check_Variant (Variant : Node_Id); + -- Check Unchecked_Union variant for lack of nested variants and + -- presence of at least one component. + + procedure Error_Pragma (Msg : String); + pragma No_Return (Error_Pragma); + -- Outputs error message for current pragma. The message contains a % + -- that will be replaced with the pragma name, and the flag is placed + -- on the pragma itself. Pragma_Exit is then raised. + + procedure Error_Pragma_Arg (Msg : String; Arg : Node_Id); + pragma No_Return (Error_Pragma_Arg); + -- Outputs error message for current pragma. The message may contain + -- a % that will be replaced with the pragma name. The parameter Arg + -- may either be a pragma argument association, in which case the flag + -- is placed on the expression of this association, or an expression, + -- in which case the flag is placed directly on the expression. The + -- message is placed using Error_Msg_N, so the message may also contain + -- an & insertion character which will reference the given Arg value. + -- After placing the message, Pragma_Exit is raised. + + procedure Error_Pragma_Arg (Msg1, Msg2 : String; Arg : Node_Id); + pragma No_Return (Error_Pragma_Arg); + -- Similar to above form of Error_Pragma_Arg except that two messages + -- are provided, the second is a continuation comment starting with \. + + procedure Error_Pragma_Arg_Ident (Msg : String; Arg : Node_Id); + pragma No_Return (Error_Pragma_Arg_Ident); + -- Outputs error message for current pragma. The message may contain + -- a % that will be replaced with the pragma name. The parameter Arg + -- must be a pragma argument association with a non-empty identifier + -- (i.e. its Chars field must be set), and the error message is placed + -- on the identifier. The message is placed using Error_Msg_N so + -- the message may also contain an & insertion character which will + -- reference the identifier. After placing the message, Pragma_Exit + -- is raised. + + procedure Error_Pragma_Ref (Msg : String; Ref : Entity_Id); + pragma No_Return (Error_Pragma_Ref); + -- Outputs error message for current pragma. The message may contain + -- a % that will be replaced with the pragma name. The parameter Ref + -- must be an entity whose name can be referenced by & and sloc by #. + -- After placing the message, Pragma_Exit is raised. + + function Find_Lib_Unit_Name return Entity_Id; + -- Used for a library unit pragma to find the entity to which the + -- library unit pragma applies, returns the entity found. + + procedure Find_Program_Unit_Name (Id : Node_Id); + -- If the pragma is a compilation unit pragma, the id must denote the + -- compilation unit in the same compilation, and the pragma must appear + -- in the list of preceding or trailing pragmas. If it is a program + -- unit pragma that is not a compilation unit pragma, then the + -- identifier must be visible. + + function Find_Unique_Parameterless_Procedure + (Name : Entity_Id; + Arg : Node_Id) return Entity_Id; + -- Used for a procedure pragma to find the unique parameterless + -- procedure identified by Name, returns it if it exists, otherwise + -- errors out and uses Arg as the pragma argument for the message. + + procedure Gather_Associations + (Names : Name_List; + Args : out Args_List); + -- This procedure is used to gather the arguments for a pragma that + -- permits arbitrary ordering of parameters using the normal rules + -- for named and positional parameters. The Names argument is a list + -- of Name_Id values that corresponds to the allowed pragma argument + -- association identifiers in order. The result returned in Args is + -- a list of corresponding expressions that are the pragma arguments. + -- Note that this is a list of expressions, not of pragma argument + -- associations (Gather_Associations has completely checked all the + -- optional identifiers when it returns). An entry in Args is Empty + -- on return if the corresponding argument is not present. + + procedure GNAT_Pragma; + -- Called for all GNAT defined pragmas to check the relevant restriction + -- (No_Implementation_Pragmas). + + function Is_Before_First_Decl + (Pragma_Node : Node_Id; + Decls : List_Id) return Boolean; + -- Return True if Pragma_Node is before the first declarative item in + -- Decls where Decls is the list of declarative items. + + function Is_Configuration_Pragma return Boolean; + -- Determines if the placement of the current pragma is appropriate + -- for a configuration pragma. + + function Is_In_Context_Clause return Boolean; + -- Returns True if pragma appears within the context clause of a unit, + -- and False for any other placement (does not generate any messages). + + function Is_Static_String_Expression (Arg : Node_Id) return Boolean; + -- Analyzes the argument, and determines if it is a static string + -- expression, returns True if so, False if non-static or not String. + + procedure Pragma_Misplaced; + pragma No_Return (Pragma_Misplaced); + -- Issue fatal error message for misplaced pragma + + procedure Process_Atomic_Shared_Volatile; + -- Common processing for pragmas Atomic, Shared, Volatile. Note that + -- Shared is an obsolete Ada 83 pragma, treated as being identical + -- in effect to pragma Atomic. + + procedure Process_Compile_Time_Warning_Or_Error; + -- Common processing for Compile_Time_Error and Compile_Time_Warning + + procedure Process_Convention (C : out Convention_Id; E : out Entity_Id); + -- Common processing for Convention, Interface, Import and Export. + -- Checks first two arguments of pragma, and sets the appropriate + -- convention value in the specified entity or entities. On return + -- C is the convention, E is the referenced entity. + + procedure Process_Extended_Import_Export_Exception_Pragma + (Arg_Internal : Node_Id; + Arg_External : Node_Id; + Arg_Form : Node_Id; + Arg_Code : Node_Id); + -- Common processing for the pragmas Import/Export_Exception. + -- The three arguments correspond to the three named parameters of + -- the pragma. An argument is empty if the corresponding parameter + -- is not present in the pragma. + + procedure Process_Extended_Import_Export_Object_Pragma + (Arg_Internal : Node_Id; + Arg_External : Node_Id; + Arg_Size : Node_Id); + -- Common processing for the pragmas Import/Export_Object. + -- The three arguments correspond to the three named parameters + -- of the pragmas. An argument is empty if the corresponding + -- parameter is not present in the pragma. + + procedure Process_Extended_Import_Export_Internal_Arg + (Arg_Internal : Node_Id := Empty); + -- Common processing for all extended Import and Export pragmas. The + -- argument is the pragma parameter for the Internal argument. If + -- Arg_Internal is empty or inappropriate, an error message is posted. + -- Otherwise, on normal return, the Entity_Field of Arg_Internal is + -- set to identify the referenced entity. + + procedure Process_Extended_Import_Export_Subprogram_Pragma + (Arg_Internal : Node_Id; + Arg_External : Node_Id; + Arg_Parameter_Types : Node_Id; + Arg_Result_Type : Node_Id := Empty; + Arg_Mechanism : Node_Id; + Arg_Result_Mechanism : Node_Id := Empty; + Arg_First_Optional_Parameter : Node_Id := Empty); + -- Common processing for all extended Import and Export pragmas + -- applying to subprograms. The caller omits any arguments that do + -- not apply to the pragma in question (for example, Arg_Result_Type + -- can be non-Empty only in the Import_Function and Export_Function + -- cases). The argument names correspond to the allowed pragma + -- association identifiers. + + procedure Process_Generic_List; + -- Common processing for Share_Generic and Inline_Generic + + procedure Process_Import_Or_Interface; + -- Common processing for Import of Interface + + procedure Process_Inline (Active : Boolean); + -- Common processing for Inline and Inline_Always. The parameter + -- indicates if the inline pragma is active, i.e. if it should + -- actually cause inlining to occur. + + procedure Process_Interface_Name + (Subprogram_Def : Entity_Id; + Ext_Arg : Node_Id; + Link_Arg : Node_Id); + -- Given the last two arguments of pragma Import, pragma Export, or + -- pragma Interface_Name, performs validity checks and sets the + -- Interface_Name field of the given subprogram entity to the + -- appropriate external or link name, depending on the arguments + -- given. Ext_Arg is always present, but Link_Arg may be missing. + -- Note that Ext_Arg may represent the Link_Name if Link_Arg is + -- missing, and appropriate named notation is used for Ext_Arg. + -- If neither Ext_Arg nor Link_Arg is present, the interface name + -- is set to the default from the subprogram name. + + procedure Process_Interrupt_Or_Attach_Handler; + -- Common processing for Interrupt and Attach_Handler pragmas + + procedure Process_Restrictions_Or_Restriction_Warnings (Warn : Boolean); + -- Common processing for Restrictions and Restriction_Warnings pragmas. + -- Warn is True for Restriction_Warnings, or for Restrictions if the + -- flag Treat_Restrictions_As_Warnings is set, and False if this flag + -- is not set in the Restrictions case. + + procedure Process_Suppress_Unsuppress (Suppress_Case : Boolean); + -- Common processing for Suppress and Unsuppress. The boolean parameter + -- Suppress_Case is True for the Suppress case, and False for the + -- Unsuppress case. + + procedure Set_Exported (E : Entity_Id; Arg : Node_Id); + -- This procedure sets the Is_Exported flag for the given entity, + -- checking that the entity was not previously imported. Arg is + -- the argument that specified the entity. A check is also made + -- for exporting inappropriate entities. + + procedure Set_Extended_Import_Export_External_Name + (Internal_Ent : Entity_Id; + Arg_External : Node_Id); + -- Common processing for all extended import export pragmas. The first + -- argument, Internal_Ent, is the internal entity, which has already + -- been checked for validity by the caller. Arg_External is from the + -- Import or Export pragma, and may be null if no External parameter + -- was present. If Arg_External is present and is a non-null string + -- (a null string is treated as the default), then the Interface_Name + -- field of Internal_Ent is set appropriately. + + procedure Set_Imported (E : Entity_Id); + -- This procedure sets the Is_Imported flag for the given entity, + -- checking that it is not previously exported or imported. + + procedure Set_Mechanism_Value (Ent : Entity_Id; Mech_Name : Node_Id); + -- Mech is a parameter passing mechanism (see Import_Function syntax + -- for MECHANISM_NAME). This routine checks that the mechanism argument + -- has the right form, and if not issues an error message. If the + -- argument has the right form then the Mechanism field of Ent is + -- set appropriately. + + procedure Set_Ravenscar_Profile (N : Node_Id); + -- Activate the set of configuration pragmas and restrictions that + -- make up the Ravenscar Profile. N is the corresponding pragma + -- node, which is used for error messages on any constructs + -- that violate the profile. + + --------------------- + -- Ada_2005_Pragma -- + --------------------- + + procedure Ada_2005_Pragma is + begin + if Ada_Version <= Ada_95 then + Check_Restriction (No_Implementation_Pragmas, N); + end if; + end Ada_2005_Pragma; + + -------------------------- + -- Check_Ada_83_Warning -- + -------------------------- + + procedure Check_Ada_83_Warning is + begin + if Ada_Version = Ada_83 and then Comes_From_Source (N) then + Error_Msg_N ("(Ada 83) pragma& is non-standard?", N); + end if; + end Check_Ada_83_Warning; + + --------------------- + -- Check_Arg_Count -- + --------------------- + + procedure Check_Arg_Count (Required : Nat) is + begin + if Arg_Count /= Required then + Error_Pragma ("wrong number of arguments for pragma%"); + end if; + end Check_Arg_Count; + + -------------------------------- + -- Check_Arg_Is_External_Name -- + -------------------------------- + + procedure Check_Arg_Is_External_Name (Arg : Node_Id) is + Argx : constant Node_Id := Get_Pragma_Arg (Arg); + + begin + if Nkind (Argx) = N_Identifier then + return; + + else + Analyze_And_Resolve (Argx, Standard_String); + + if Is_OK_Static_Expression (Argx) then + return; + + elsif Etype (Argx) = Any_Type then + raise Pragma_Exit; + + -- An interesting special case, if we have a string literal and + -- we are in Ada 83 mode, then we allow it even though it will + -- not be flagged as static. This allows expected Ada 83 mode + -- use of external names which are string literals, even though + -- technically these are not static in Ada 83. + + elsif Ada_Version = Ada_83 + and then Nkind (Argx) = N_String_Literal + then + return; + + -- Static expression that raises Constraint_Error. This has + -- already been flagged, so just exit from pragma processing. + + elsif Is_Static_Expression (Argx) then + raise Pragma_Exit; + + -- Here we have a real error (non-static expression) + + else + Error_Msg_Name_1 := Pname; + Flag_Non_Static_Expr + ("argument for pragma% must be a identifier or " & + "static string expression!", Argx); + raise Pragma_Exit; + end if; + end if; + end Check_Arg_Is_External_Name; + + ----------------------------- + -- Check_Arg_Is_Identifier -- + ----------------------------- + + procedure Check_Arg_Is_Identifier (Arg : Node_Id) is + Argx : constant Node_Id := Get_Pragma_Arg (Arg); + begin + if Nkind (Argx) /= N_Identifier then + Error_Pragma_Arg + ("argument for pragma% must be identifier", Argx); + end if; + end Check_Arg_Is_Identifier; + + ---------------------------------- + -- Check_Arg_Is_Integer_Literal -- + ---------------------------------- + + procedure Check_Arg_Is_Integer_Literal (Arg : Node_Id) is + Argx : constant Node_Id := Get_Pragma_Arg (Arg); + begin + if Nkind (Argx) /= N_Integer_Literal then + Error_Pragma_Arg + ("argument for pragma% must be integer literal", Argx); + end if; + end Check_Arg_Is_Integer_Literal; + + ------------------------------------------- + -- Check_Arg_Is_Library_Level_Local_Name -- + ------------------------------------------- + + -- LOCAL_NAME ::= + -- DIRECT_NAME + -- | DIRECT_NAME'ATTRIBUTE_DESIGNATOR + -- | library_unit_NAME + + procedure Check_Arg_Is_Library_Level_Local_Name (Arg : Node_Id) is + begin + Check_Arg_Is_Local_Name (Arg); + + if not Is_Library_Level_Entity (Entity (Expression (Arg))) + and then Comes_From_Source (N) + then + Error_Pragma_Arg + ("argument for pragma% must be library level entity", Arg); + end if; + end Check_Arg_Is_Library_Level_Local_Name; + + ----------------------------- + -- Check_Arg_Is_Local_Name -- + ----------------------------- + + -- LOCAL_NAME ::= + -- DIRECT_NAME + -- | DIRECT_NAME'ATTRIBUTE_DESIGNATOR + -- | library_unit_NAME + + procedure Check_Arg_Is_Local_Name (Arg : Node_Id) is + Argx : constant Node_Id := Get_Pragma_Arg (Arg); + + begin + Analyze (Argx); + + if Nkind (Argx) not in N_Direct_Name + and then (Nkind (Argx) /= N_Attribute_Reference + or else Present (Expressions (Argx)) + or else Nkind (Prefix (Argx)) /= N_Identifier) + and then (not Is_Entity_Name (Argx) + or else not Is_Compilation_Unit (Entity (Argx))) + then + Error_Pragma_Arg ("argument for pragma% must be local name", Argx); + end if; + + if Is_Entity_Name (Argx) + and then Scope (Entity (Argx)) /= Current_Scope + then + Error_Pragma_Arg + ("pragma% argument must be in same declarative part", Arg); + end if; + end Check_Arg_Is_Local_Name; + + --------------------------------- + -- Check_Arg_Is_Locking_Policy -- + --------------------------------- + + procedure Check_Arg_Is_Locking_Policy (Arg : Node_Id) is + Argx : constant Node_Id := Get_Pragma_Arg (Arg); + + begin + Check_Arg_Is_Identifier (Argx); + + if not Is_Locking_Policy_Name (Chars (Argx)) then + Error_Pragma_Arg + ("& is not a valid locking policy name", Argx); + end if; + end Check_Arg_Is_Locking_Policy; + + ------------------------- + -- Check_Arg_Is_One_Of -- + ------------------------- + + procedure Check_Arg_Is_One_Of (Arg : Node_Id; N1, N2 : Name_Id) is + Argx : constant Node_Id := Get_Pragma_Arg (Arg); + + begin + Check_Arg_Is_Identifier (Argx); + + if Chars (Argx) /= N1 and then Chars (Argx) /= N2 then + Error_Msg_Name_2 := N1; + Error_Msg_Name_3 := N2; + Error_Pragma_Arg ("argument for pragma% must be% or%", Argx); + end if; + end Check_Arg_Is_One_Of; + + procedure Check_Arg_Is_One_Of + (Arg : Node_Id; + N1, N2, N3 : Name_Id) + is + Argx : constant Node_Id := Get_Pragma_Arg (Arg); + + begin + Check_Arg_Is_Identifier (Argx); + + if Chars (Argx) /= N1 + and then Chars (Argx) /= N2 + and then Chars (Argx) /= N3 + then + Error_Pragma_Arg ("invalid argument for pragma%", Argx); + end if; + end Check_Arg_Is_One_Of; + + procedure Check_Arg_Is_One_Of + (Arg : Node_Id; + N1, N2, N3, N4 : Name_Id) + is + Argx : constant Node_Id := Get_Pragma_Arg (Arg); + + begin + Check_Arg_Is_Identifier (Argx); + + if Chars (Argx) /= N1 + and then Chars (Argx) /= N2 + and then Chars (Argx) /= N3 + and then Chars (Argx) /= N4 + then + Error_Pragma_Arg ("invalid argument for pragma%", Argx); + end if; + end Check_Arg_Is_One_Of; + + --------------------------------- + -- Check_Arg_Is_Queuing_Policy -- + --------------------------------- + + procedure Check_Arg_Is_Queuing_Policy (Arg : Node_Id) is + Argx : constant Node_Id := Get_Pragma_Arg (Arg); + + begin + Check_Arg_Is_Identifier (Argx); + + if not Is_Queuing_Policy_Name (Chars (Argx)) then + Error_Pragma_Arg + ("& is not a valid queuing policy name", Argx); + end if; + end Check_Arg_Is_Queuing_Policy; + + ------------------------------------ + -- Check_Arg_Is_Static_Expression -- + ------------------------------------ + + procedure Check_Arg_Is_Static_Expression + (Arg : Node_Id; + Typ : Entity_Id) + is + Argx : constant Node_Id := Get_Pragma_Arg (Arg); + + begin + Analyze_And_Resolve (Argx, Typ); + + if Is_OK_Static_Expression (Argx) then + return; + + elsif Etype (Argx) = Any_Type then + raise Pragma_Exit; + + -- An interesting special case, if we have a string literal and + -- we are in Ada 83 mode, then we allow it even though it will + -- not be flagged as static. This allows the use of Ada 95 + -- pragmas like Import in Ada 83 mode. They will of course be + -- flagged with warnings as usual, but will not cause errors. + + elsif Ada_Version = Ada_83 + and then Nkind (Argx) = N_String_Literal + then + return; + + -- Static expression that raises Constraint_Error. This has + -- already been flagged, so just exit from pragma processing. + + elsif Is_Static_Expression (Argx) then + raise Pragma_Exit; + + -- Finally, we have a real error + + else + Error_Msg_Name_1 := Pname; + Flag_Non_Static_Expr + ("argument for pragma% must be a static expression!", Argx); + raise Pragma_Exit; + end if; + end Check_Arg_Is_Static_Expression; + + --------------------------------- + -- Check_Arg_Is_String_Literal -- + --------------------------------- + + procedure Check_Arg_Is_String_Literal (Arg : Node_Id) is + Argx : constant Node_Id := Get_Pragma_Arg (Arg); + begin + if Nkind (Argx) /= N_String_Literal then + Error_Pragma_Arg + ("argument for pragma% must be string literal", Argx); + end if; + end Check_Arg_Is_String_Literal; + + ------------------------------------------ + -- Check_Arg_Is_Task_Dispatching_Policy -- + ------------------------------------------ + + procedure Check_Arg_Is_Task_Dispatching_Policy (Arg : Node_Id) is + Argx : constant Node_Id := Get_Pragma_Arg (Arg); + + begin + Check_Arg_Is_Identifier (Argx); + + if not Is_Task_Dispatching_Policy_Name (Chars (Argx)) then + Error_Pragma_Arg + ("& is not a valid task dispatching policy name", Argx); + end if; + end Check_Arg_Is_Task_Dispatching_Policy; + + --------------------- + -- Check_Arg_Order -- + --------------------- + + procedure Check_Arg_Order (Names : Name_List) is + Arg : Node_Id; + + Highest_So_Far : Natural := 0; + -- Highest index in Names seen do far + + begin + Arg := Arg1; + for J in 1 .. Arg_Count loop + if Chars (Arg) /= No_Name then + for K in Names'Range loop + if Chars (Arg) = Names (K) then + if K < Highest_So_Far then + Error_Msg_Name_1 := Pname; + Error_Msg_N + ("parameters out of order for pragma%", Arg); + Error_Msg_Name_1 := Names (K); + Error_Msg_Name_2 := Names (Highest_So_Far); + Error_Msg_N ("\% must appear before %", Arg); + raise Pragma_Exit; + + else + Highest_So_Far := K; + end if; + end if; + end loop; + end if; + + Arg := Next (Arg); + end loop; + end Check_Arg_Order; + + -------------------------------- + -- Check_At_Least_N_Arguments -- + -------------------------------- + + procedure Check_At_Least_N_Arguments (N : Nat) is + begin + if Arg_Count < N then + Error_Pragma ("too few arguments for pragma%"); + end if; + end Check_At_Least_N_Arguments; + + ------------------------------- + -- Check_At_Most_N_Arguments -- + ------------------------------- + + procedure Check_At_Most_N_Arguments (N : Nat) is + Arg : Node_Id; + begin + if Arg_Count > N then + Arg := Arg1; + for J in 1 .. N loop + Next (Arg); + Error_Pragma_Arg ("too many arguments for pragma%", Arg); + end loop; + end if; + end Check_At_Most_N_Arguments; + + --------------------- + -- Check_Component -- + --------------------- + + procedure Check_Component (Comp : Node_Id) is + begin + if Nkind (Comp) = N_Component_Declaration then + declare + Sindic : constant Node_Id := + Subtype_Indication (Component_Definition (Comp)); + Typ : constant Entity_Id := + Etype (Defining_Identifier (Comp)); + begin + if Nkind (Sindic) = N_Subtype_Indication then + + -- Ada 2005 (AI-216): If a component subtype is subject to + -- a per-object constraint, then the component type shall + -- be an Unchecked_Union. + + if Has_Per_Object_Constraint (Defining_Identifier (Comp)) + and then + not Is_Unchecked_Union (Etype (Subtype_Mark (Sindic))) + then + Error_Msg_N ("component subtype subject to per-object" & + " constraint must be an Unchecked_Union", Comp); + end if; + end if; + + if Is_Controlled (Typ) then + Error_Msg_N + ("component of unchecked union cannot be controlled", Comp); + + elsif Has_Task (Typ) then + Error_Msg_N + ("component of unchecked union cannot have tasks", Comp); + end if; + end; + end if; + end Check_Component; + + ---------------------------------- + -- Check_Duplicated_Export_Name -- + ---------------------------------- + + procedure Check_Duplicated_Export_Name (Nam : Node_Id) is + String_Val : constant String_Id := Strval (Nam); + + begin + -- We are only interested in the export case, and in the case of + -- generics, it is the instance, not the template, that is the + -- problem (the template will generate a warning in any case). + + if not Inside_A_Generic + and then (Prag_Id = Pragma_Export + or else + Prag_Id = Pragma_Export_Procedure + or else + Prag_Id = Pragma_Export_Valued_Procedure + or else + Prag_Id = Pragma_Export_Function) + then + for J in Externals.First .. Externals.Last loop + if String_Equal (String_Val, Strval (Externals.Table (J))) then + Error_Msg_Sloc := Sloc (Externals.Table (J)); + Error_Msg_N ("external name duplicates name given#", Nam); + exit; + end if; + end loop; + + Externals.Append (Nam); + end if; + end Check_Duplicated_Export_Name; + + ------------------------- + -- Check_First_Subtype -- + ------------------------- + + procedure Check_First_Subtype (Arg : Node_Id) is + Argx : constant Node_Id := Get_Pragma_Arg (Arg); + begin + if not Is_First_Subtype (Entity (Argx)) then + Error_Pragma_Arg + ("pragma% cannot apply to subtype", Argx); + end if; + end Check_First_Subtype; + + --------------------------- + -- Check_In_Main_Program -- + --------------------------- + + procedure Check_In_Main_Program is + P : constant Node_Id := Parent (N); + + begin + -- Must be at in subprogram body + + if Nkind (P) /= N_Subprogram_Body then + Error_Pragma ("% pragma allowed only in subprogram"); + + -- Otherwise warn if obviously not main program + + elsif Present (Parameter_Specifications (Specification (P))) + or else not Is_Compilation_Unit (Defining_Entity (P)) + then + Error_Msg_Name_1 := Pname; + Error_Msg_N + ("?pragma% is only effective in main program", N); + end if; + end Check_In_Main_Program; + + --------------------------------------- + -- Check_Interrupt_Or_Attach_Handler -- + --------------------------------------- + + procedure Check_Interrupt_Or_Attach_Handler is + Arg1_X : constant Node_Id := Expression (Arg1); + Handler_Proc, Proc_Scope : Entity_Id; + + begin + Analyze (Arg1_X); + + if Prag_Id = Pragma_Interrupt_Handler then + Check_Restriction (No_Dynamic_Attachment, N); + end if; + + Handler_Proc := Find_Unique_Parameterless_Procedure (Arg1_X, Arg1); + Proc_Scope := Scope (Handler_Proc); + + -- On AAMP only, a pragma Interrupt_Handler is supported for + -- nonprotected parameterless procedures. + + if not AAMP_On_Target + or else Prag_Id = Pragma_Attach_Handler + then + if Ekind (Proc_Scope) /= E_Protected_Type then + Error_Pragma_Arg + ("argument of pragma% must be protected procedure", Arg1); + end if; + + if Parent (N) /= Protected_Definition (Parent (Proc_Scope)) then + Error_Pragma ("pragma% must be in protected definition"); + end if; + end if; + + if not Is_Library_Level_Entity (Proc_Scope) + or else (AAMP_On_Target + and then not Is_Library_Level_Entity (Handler_Proc)) + then + Error_Pragma_Arg + ("argument for pragma% must be library level entity", Arg1); + end if; + end Check_Interrupt_Or_Attach_Handler; + + ------------------------------------------- + -- Check_Is_In_Decl_Part_Or_Package_Spec -- + ------------------------------------------- + + procedure Check_Is_In_Decl_Part_Or_Package_Spec is + P : Node_Id; + + begin + P := Parent (N); + loop + if No (P) then + exit; + + elsif Nkind (P) = N_Handled_Sequence_Of_Statements then + exit; + + elsif Nkind (P) = N_Package_Specification then + return; + + elsif Nkind (P) = N_Block_Statement then + return; + + -- Note: the following tests seem a little peculiar, because + -- they test for bodies, but if we were in the statement part + -- of the body, we would already have hit the handled statement + -- sequence, so the only way we get here is by being in the + -- declarative part of the body. + + elsif Nkind_In (P, N_Subprogram_Body, + N_Package_Body, + N_Task_Body, + N_Entry_Body) + then + return; + end if; + + P := Parent (P); + end loop; + + Error_Pragma ("pragma% is not in declarative part or package spec"); + end Check_Is_In_Decl_Part_Or_Package_Spec; + + ------------------------- + -- Check_No_Identifier -- + ------------------------- + + procedure Check_No_Identifier (Arg : Node_Id) is + begin + if Chars (Arg) /= No_Name then + Error_Pragma_Arg_Ident + ("pragma% does not permit identifier& here", Arg); + end if; + end Check_No_Identifier; + + -------------------------- + -- Check_No_Identifiers -- + -------------------------- + + procedure Check_No_Identifiers is + Arg_Node : Node_Id; + begin + if Arg_Count > 0 then + Arg_Node := Arg1; + while Present (Arg_Node) loop + Check_No_Identifier (Arg_Node); + Next (Arg_Node); + end loop; + end if; + end Check_No_Identifiers; + + ------------------------------- + -- Check_Optional_Identifier -- + ------------------------------- + + procedure Check_Optional_Identifier (Arg : Node_Id; Id : Name_Id) is + begin + if Present (Arg) and then Chars (Arg) /= No_Name then + if Chars (Arg) /= Id then + Error_Msg_Name_1 := Pname; + Error_Msg_Name_2 := Id; + Error_Msg_N ("pragma% argument expects identifier%", Arg); + raise Pragma_Exit; + end if; + end if; + end Check_Optional_Identifier; + + procedure Check_Optional_Identifier (Arg : Node_Id; Id : String) is + begin + Name_Buffer (1 .. Id'Length) := Id; + Name_Len := Id'Length; + Check_Optional_Identifier (Arg, Name_Find); + end Check_Optional_Identifier; + + -------------------------------------- + -- Check_Precondition_Postcondition -- + -------------------------------------- + + procedure Check_Precondition_Postcondition (In_Body : out Boolean) is + P : Node_Id; + PO : Node_Id; + + procedure Chain_PPC (PO : Node_Id); + -- If PO is a subprogram declaration node (or a generic subprogram + -- declaration node), then the precondition/postcondition applies + -- to this subprogram and the processing for the pragma is completed. + -- Otherwise the pragma is misplaced. + + --------------- + -- Chain_PPC -- + --------------- + + procedure Chain_PPC (PO : Node_Id) is + S : Node_Id; + + begin + if not Nkind_In (PO, N_Subprogram_Declaration, + N_Generic_Subprogram_Declaration) + then + Pragma_Misplaced; + end if; + + -- Here if we have subprogram or generic subprogram declaration + + S := Defining_Unit_Name (Specification (PO)); + + -- Analyze the pragma unless it appears within a package spec, + -- which is the case where we delay the analysis of the PPC until + -- the end of the package declarations (for details, see + -- Analyze_Package_Specification.Analyze_PPCs). + + if not Is_Package_Or_Generic_Package (Scope (S)) then + Analyze_PPC_In_Decl_Part (N, S); + end if; + + -- Chain spec PPC pragma to list for subprogram + + Set_Next_Pragma (N, Spec_PPC_List (S)); + Set_Spec_PPC_List (S, N); + + -- Return indicating spec case + + In_Body := False; + return; + end Chain_PPC; + + -- Start of processing for Check_Precondition_Postcondition + + begin + if not Is_List_Member (N) then + Pragma_Misplaced; + end if; + + -- Record whether pragma is enabled + + Set_PPC_Enabled (N, Check_Enabled (Pname)); + + -- If we are within an inlined body, the legality of the pragma + -- has been checked already. + + if In_Inlined_Body then + In_Body := True; + return; + end if; + + -- Search prior declarations + + P := N; + while Present (Prev (P)) loop + P := Prev (P); + + -- If the previous node is a generic subprogram, do not go to + -- to the original node, which is the unanalyzed tree: we need + -- to attach the pre/postconditions to the analyzed version + -- at this point. They get propagated to the original tree when + -- analyzing the corresponding body. + + if Nkind (P) not in N_Generic_Declaration then + PO := Original_Node (P); + else + PO := P; + end if; + + -- Skip past prior pragma + + if Nkind (PO) = N_Pragma then + null; + + -- Skip stuff not coming from source + + elsif not Comes_From_Source (PO) then + null; + + -- Only remaining possibility is subprogram declaration + + else + Chain_PPC (PO); + return; + end if; + end loop; + + -- If we fall through loop, pragma is at start of list, so see if + -- it is at the start of declarations of a subprogram body. + + if Nkind (Parent (N)) = N_Subprogram_Body + and then List_Containing (N) = Declarations (Parent (N)) + then + if Operating_Mode /= Generate_Code then + + -- Analyze expression in pragma, for correctness + -- and for ASIS use. + + Preanalyze_Spec_Expression + (Get_Pragma_Arg (Arg1), Standard_Boolean); + end if; + + In_Body := True; + return; + + -- See if it is in the pragmas after a library level subprogram + + elsif Nkind (Parent (N)) = N_Compilation_Unit_Aux then + Chain_PPC (Unit (Parent (Parent (N)))); + return; + end if; + + -- If we fall through, pragma was misplaced + + Pragma_Misplaced; + end Check_Precondition_Postcondition; + + ----------------------------- + -- Check_Static_Constraint -- + ----------------------------- + + -- Note: for convenience in writing this procedure, in addition to + -- the officially (i.e. by spec) allowed argument which is always + -- a constraint, it also allows ranges and discriminant associations. + -- Above is not clear ??? + + procedure Check_Static_Constraint (Constr : Node_Id) is + + procedure Require_Static (E : Node_Id); + -- Require given expression to be static expression + + -------------------- + -- Require_Static -- + -------------------- + + procedure Require_Static (E : Node_Id) is + begin + if not Is_OK_Static_Expression (E) then + Flag_Non_Static_Expr + ("non-static constraint not allowed in Unchecked_Union!", E); + raise Pragma_Exit; + end if; + end Require_Static; + + -- Start of processing for Check_Static_Constraint + + begin + case Nkind (Constr) is + when N_Discriminant_Association => + Require_Static (Expression (Constr)); + + when N_Range => + Require_Static (Low_Bound (Constr)); + Require_Static (High_Bound (Constr)); + + when N_Attribute_Reference => + Require_Static (Type_Low_Bound (Etype (Prefix (Constr)))); + Require_Static (Type_High_Bound (Etype (Prefix (Constr)))); + + when N_Range_Constraint => + Check_Static_Constraint (Range_Expression (Constr)); + + when N_Index_Or_Discriminant_Constraint => + declare + IDC : Entity_Id; + begin + IDC := First (Constraints (Constr)); + while Present (IDC) loop + Check_Static_Constraint (IDC); + Next (IDC); + end loop; + end; + + when others => + null; + end case; + end Check_Static_Constraint; + + -------------------------------------- + -- Check_Valid_Configuration_Pragma -- + -------------------------------------- + + -- A configuration pragma must appear in the context clause of a + -- compilation unit, and only other pragmas may precede it. Note that + -- the test also allows use in a configuration pragma file. + + procedure Check_Valid_Configuration_Pragma is + begin + if not Is_Configuration_Pragma then + Error_Pragma ("incorrect placement for configuration pragma%"); + end if; + end Check_Valid_Configuration_Pragma; + + ------------------------------------- + -- Check_Valid_Library_Unit_Pragma -- + ------------------------------------- + + procedure Check_Valid_Library_Unit_Pragma is + Plist : List_Id; + Parent_Node : Node_Id; + Unit_Name : Entity_Id; + Unit_Kind : Node_Kind; + Unit_Node : Node_Id; + Sindex : Source_File_Index; + + begin + if not Is_List_Member (N) then + Pragma_Misplaced; + + else + Plist := List_Containing (N); + Parent_Node := Parent (Plist); + + if Parent_Node = Empty then + Pragma_Misplaced; + + -- Case of pragma appearing after a compilation unit. In this + -- case it must have an argument with the corresponding name + -- and must be part of the following pragmas of its parent. + + elsif Nkind (Parent_Node) = N_Compilation_Unit_Aux then + if Plist /= Pragmas_After (Parent_Node) then + Pragma_Misplaced; + + elsif Arg_Count = 0 then + Error_Pragma + ("argument required if outside compilation unit"); + + else + Check_No_Identifiers; + Check_Arg_Count (1); + Unit_Node := Unit (Parent (Parent_Node)); + Unit_Kind := Nkind (Unit_Node); + + Analyze (Expression (Arg1)); + + if Unit_Kind = N_Generic_Subprogram_Declaration + or else Unit_Kind = N_Subprogram_Declaration + then + Unit_Name := Defining_Entity (Unit_Node); + + elsif Unit_Kind in N_Generic_Instantiation then + Unit_Name := Defining_Entity (Unit_Node); + + else + Unit_Name := Cunit_Entity (Current_Sem_Unit); + end if; + + if Chars (Unit_Name) /= + Chars (Entity (Expression (Arg1))) + then + Error_Pragma_Arg + ("pragma% argument is not current unit name", Arg1); + end if; + + if Ekind (Unit_Name) = E_Package + and then Present (Renamed_Entity (Unit_Name)) + then + Error_Pragma ("pragma% not allowed for renamed package"); + end if; + end if; + + -- Pragma appears other than after a compilation unit + + else + -- Here we check for the generic instantiation case and also + -- for the case of processing a generic formal package. We + -- detect these cases by noting that the Sloc on the node + -- does not belong to the current compilation unit. + + Sindex := Source_Index (Current_Sem_Unit); + + if Loc not in Source_First (Sindex) .. Source_Last (Sindex) then + Rewrite (N, Make_Null_Statement (Loc)); + return; + + -- If before first declaration, the pragma applies to the + -- enclosing unit, and the name if present must be this name. + + elsif Is_Before_First_Decl (N, Plist) then + Unit_Node := Unit_Declaration_Node (Current_Scope); + Unit_Kind := Nkind (Unit_Node); + + if Nkind (Parent (Unit_Node)) /= N_Compilation_Unit then + Pragma_Misplaced; + + elsif Unit_Kind = N_Subprogram_Body + and then not Acts_As_Spec (Unit_Node) + then + Pragma_Misplaced; + + elsif Nkind (Parent_Node) = N_Package_Body then + Pragma_Misplaced; + + elsif Nkind (Parent_Node) = N_Package_Specification + and then Plist = Private_Declarations (Parent_Node) + then + Pragma_Misplaced; + + elsif (Nkind (Parent_Node) = N_Generic_Package_Declaration + or else Nkind (Parent_Node) = + N_Generic_Subprogram_Declaration) + and then Plist = Generic_Formal_Declarations (Parent_Node) + then + Pragma_Misplaced; + + elsif Arg_Count > 0 then + Analyze (Expression (Arg1)); + + if Entity (Expression (Arg1)) /= Current_Scope then + Error_Pragma_Arg + ("name in pragma% must be enclosing unit", Arg1); + end if; + + -- It is legal to have no argument in this context + + else + return; + end if; + + -- Error if not before first declaration. This is because a + -- library unit pragma argument must be the name of a library + -- unit (RM 10.1.5(7)), but the only names permitted in this + -- context are (RM 10.1.5(6)) names of subprogram declarations, + -- generic subprogram declarations or generic instantiations. + + else + Error_Pragma + ("pragma% misplaced, must be before first declaration"); + end if; + end if; + end if; + end Check_Valid_Library_Unit_Pragma; + + ------------------- + -- Check_Variant -- + ------------------- + + procedure Check_Variant (Variant : Node_Id) is + Clist : constant Node_Id := Component_List (Variant); + Comp : Node_Id; + + begin + if not Is_Non_Empty_List (Component_Items (Clist)) then + Error_Msg_N + ("Unchecked_Union may not have empty component list", + Variant); + return; + end if; + + Comp := First (Component_Items (Clist)); + while Present (Comp) loop + Check_Component (Comp); + Next (Comp); + end loop; + end Check_Variant; + + ------------------ + -- Error_Pragma -- + ------------------ + + procedure Error_Pragma (Msg : String) is + begin + Error_Msg_Name_1 := Pname; + Error_Msg_N (Msg, N); + raise Pragma_Exit; + end Error_Pragma; + + ---------------------- + -- Error_Pragma_Arg -- + ---------------------- + + procedure Error_Pragma_Arg (Msg : String; Arg : Node_Id) is + begin + Error_Msg_Name_1 := Pname; + Error_Msg_N (Msg, Get_Pragma_Arg (Arg)); + raise Pragma_Exit; + end Error_Pragma_Arg; + + procedure Error_Pragma_Arg (Msg1, Msg2 : String; Arg : Node_Id) is + begin + Error_Msg_Name_1 := Pname; + Error_Msg_N (Msg1, Get_Pragma_Arg (Arg)); + Error_Pragma_Arg (Msg2, Arg); + end Error_Pragma_Arg; + + ---------------------------- + -- Error_Pragma_Arg_Ident -- + ---------------------------- + + procedure Error_Pragma_Arg_Ident (Msg : String; Arg : Node_Id) is + begin + Error_Msg_Name_1 := Pname; + Error_Msg_N (Msg, Arg); + raise Pragma_Exit; + end Error_Pragma_Arg_Ident; + + ---------------------- + -- Error_Pragma_Ref -- + ---------------------- + + procedure Error_Pragma_Ref (Msg : String; Ref : Entity_Id) is + begin + Error_Msg_Name_1 := Pname; + Error_Msg_Sloc := Sloc (Ref); + Error_Msg_NE (Msg, N, Ref); + raise Pragma_Exit; + end Error_Pragma_Ref; + + ------------------------ + -- Find_Lib_Unit_Name -- + ------------------------ + + function Find_Lib_Unit_Name return Entity_Id is + begin + -- Return inner compilation unit entity, for case of nested + -- categorization pragmas. This happens in generic unit. + + if Nkind (Parent (N)) = N_Package_Specification + and then Defining_Entity (Parent (N)) /= Current_Scope + then + return Defining_Entity (Parent (N)); + else + return Current_Scope; + end if; + end Find_Lib_Unit_Name; + + ---------------------------- + -- Find_Program_Unit_Name -- + ---------------------------- + + procedure Find_Program_Unit_Name (Id : Node_Id) is + Unit_Name : Entity_Id; + Unit_Kind : Node_Kind; + P : constant Node_Id := Parent (N); + + begin + if Nkind (P) = N_Compilation_Unit then + Unit_Kind := Nkind (Unit (P)); + + if Unit_Kind = N_Subprogram_Declaration + or else Unit_Kind = N_Package_Declaration + or else Unit_Kind in N_Generic_Declaration + then + Unit_Name := Defining_Entity (Unit (P)); + + if Chars (Id) = Chars (Unit_Name) then + Set_Entity (Id, Unit_Name); + Set_Etype (Id, Etype (Unit_Name)); + else + Set_Etype (Id, Any_Type); + Error_Pragma + ("cannot find program unit referenced by pragma%"); + end if; + + else + Set_Etype (Id, Any_Type); + Error_Pragma ("pragma% inapplicable to this unit"); + end if; + + else + Analyze (Id); + end if; + end Find_Program_Unit_Name; + + ----------------------------------------- + -- Find_Unique_Parameterless_Procedure -- + ----------------------------------------- + + function Find_Unique_Parameterless_Procedure + (Name : Entity_Id; + Arg : Node_Id) return Entity_Id + is + Proc : Entity_Id := Empty; + + begin + -- The body of this procedure needs some comments ??? + + if not Is_Entity_Name (Name) then + Error_Pragma_Arg + ("argument of pragma% must be entity name", Arg); + + elsif not Is_Overloaded (Name) then + Proc := Entity (Name); + + if Ekind (Proc) /= E_Procedure + or else Present (First_Formal (Proc)) then + Error_Pragma_Arg + ("argument of pragma% must be parameterless procedure", Arg); + end if; + + else + declare + Found : Boolean := False; + It : Interp; + Index : Interp_Index; + + begin + Get_First_Interp (Name, Index, It); + while Present (It.Nam) loop + Proc := It.Nam; + + if Ekind (Proc) = E_Procedure + and then No (First_Formal (Proc)) + then + if not Found then + Found := True; + Set_Entity (Name, Proc); + Set_Is_Overloaded (Name, False); + else + Error_Pragma_Arg + ("ambiguous handler name for pragma% ", Arg); + end if; + end if; + + Get_Next_Interp (Index, It); + end loop; + + if not Found then + Error_Pragma_Arg + ("argument of pragma% must be parameterless procedure", + Arg); + else + Proc := Entity (Name); + end if; + end; + end if; + + return Proc; + end Find_Unique_Parameterless_Procedure; + + ------------------------- + -- Gather_Associations -- + ------------------------- + + procedure Gather_Associations + (Names : Name_List; + Args : out Args_List) + is + Arg : Node_Id; + + begin + -- Initialize all parameters to Empty + + for J in Args'Range loop + Args (J) := Empty; + end loop; + + -- That's all we have to do if there are no argument associations + + if No (Pragma_Argument_Associations (N)) then + return; + end if; + + -- Otherwise first deal with any positional parameters present + + Arg := First (Pragma_Argument_Associations (N)); + for Index in Args'Range loop + exit when No (Arg) or else Chars (Arg) /= No_Name; + Args (Index) := Expression (Arg); + Next (Arg); + end loop; + + -- Positional parameters all processed, if any left, then we + -- have too many positional parameters. + + if Present (Arg) and then Chars (Arg) = No_Name then + Error_Pragma_Arg + ("too many positional associations for pragma%", Arg); + end if; + + -- Process named parameters if any are present + + while Present (Arg) loop + if Chars (Arg) = No_Name then + Error_Pragma_Arg + ("positional association cannot follow named association", + Arg); + + else + for Index in Names'Range loop + if Names (Index) = Chars (Arg) then + if Present (Args (Index)) then + Error_Pragma_Arg + ("duplicate argument association for pragma%", Arg); + else + Args (Index) := Expression (Arg); + exit; + end if; + end if; + + if Index = Names'Last then + Error_Msg_Name_1 := Pname; + Error_Msg_N ("pragma% does not allow & argument", Arg); + + -- Check for possible misspelling + + for Index1 in Names'Range loop + if Is_Bad_Spelling_Of + (Chars (Arg), Names (Index1)) + then + Error_Msg_Name_1 := Names (Index1); + Error_Msg_N ("\possible misspelling of%", Arg); + exit; + end if; + end loop; + + raise Pragma_Exit; + end if; + end loop; + end if; + + Next (Arg); + end loop; + end Gather_Associations; + + ----------------- + -- GNAT_Pragma -- + ----------------- + + procedure GNAT_Pragma is + begin + Check_Restriction (No_Implementation_Pragmas, N); + end GNAT_Pragma; + + -------------------------- + -- Is_Before_First_Decl -- + -------------------------- + + function Is_Before_First_Decl + (Pragma_Node : Node_Id; + Decls : List_Id) return Boolean + is + Item : Node_Id := First (Decls); + + begin + -- Only other pragmas can come before this pragma + + loop + if No (Item) or else Nkind (Item) /= N_Pragma then + return False; + + elsif Item = Pragma_Node then + return True; + end if; + + Next (Item); + end loop; + end Is_Before_First_Decl; + + ----------------------------- + -- Is_Configuration_Pragma -- + ----------------------------- + + -- A configuration pragma must appear in the context clause of a + -- compilation unit, and only other pragmas may precede it. Note that + -- the test below also permits use in a configuration pragma file. + + function Is_Configuration_Pragma return Boolean is + Lis : constant List_Id := List_Containing (N); + Par : constant Node_Id := Parent (N); + Prg : Node_Id; + + begin + -- If no parent, then we are in the configuration pragma file, + -- so the placement is definitely appropriate. + + if No (Par) then + return True; + + -- Otherwise we must be in the context clause of a compilation unit + -- and the only thing allowed before us in the context list is more + -- configuration pragmas. + + elsif Nkind (Par) = N_Compilation_Unit + and then Context_Items (Par) = Lis + then + Prg := First (Lis); + + loop + if Prg = N then + return True; + elsif Nkind (Prg) /= N_Pragma then + return False; + end if; + + Next (Prg); + end loop; + + else + return False; + end if; + end Is_Configuration_Pragma; + + -------------------------- + -- Is_In_Context_Clause -- + -------------------------- + + function Is_In_Context_Clause return Boolean is + Plist : List_Id; + Parent_Node : Node_Id; + + begin + if not Is_List_Member (N) then + return False; + + else + Plist := List_Containing (N); + Parent_Node := Parent (Plist); + + if Parent_Node = Empty + or else Nkind (Parent_Node) /= N_Compilation_Unit + or else Context_Items (Parent_Node) /= Plist + then + return False; + end if; + end if; + + return True; + end Is_In_Context_Clause; + + --------------------------------- + -- Is_Static_String_Expression -- + --------------------------------- + + function Is_Static_String_Expression (Arg : Node_Id) return Boolean is + Argx : constant Node_Id := Get_Pragma_Arg (Arg); + + begin + Analyze_And_Resolve (Argx); + return Is_OK_Static_Expression (Argx) + and then Nkind (Argx) = N_String_Literal; + end Is_Static_String_Expression; + + ---------------------- + -- Pragma_Misplaced -- + ---------------------- + + procedure Pragma_Misplaced is + begin + Error_Pragma ("incorrect placement of pragma%"); + end Pragma_Misplaced; + + ------------------------------------ + -- Process Atomic_Shared_Volatile -- + ------------------------------------ + + procedure Process_Atomic_Shared_Volatile is + E_Id : Node_Id; + E : Entity_Id; + D : Node_Id; + K : Node_Kind; + Utyp : Entity_Id; + + procedure Set_Atomic (E : Entity_Id); + -- Set given type as atomic, and if no explicit alignment was given, + -- set alignment to unknown, since back end knows what the alignment + -- requirements are for atomic arrays. Note: this step is necessary + -- for derived types. + + ---------------- + -- Set_Atomic -- + ---------------- + + procedure Set_Atomic (E : Entity_Id) is + begin + Set_Is_Atomic (E); + + if not Has_Alignment_Clause (E) then + Set_Alignment (E, Uint_0); + end if; + end Set_Atomic; + + -- Start of processing for Process_Atomic_Shared_Volatile + + begin + Check_Ada_83_Warning; + Check_No_Identifiers; + Check_Arg_Count (1); + Check_Arg_Is_Local_Name (Arg1); + E_Id := Expression (Arg1); + + if Etype (E_Id) = Any_Type then + return; + end if; + + E := Entity (E_Id); + D := Declaration_Node (E); + K := Nkind (D); + + if Is_Type (E) then + if Rep_Item_Too_Early (E, N) + or else + Rep_Item_Too_Late (E, N) + then + return; + else + Check_First_Subtype (Arg1); + end if; + + if Prag_Id /= Pragma_Volatile then + Set_Atomic (E); + Set_Atomic (Underlying_Type (E)); + Set_Atomic (Base_Type (E)); + end if; + + -- Attribute belongs on the base type. If the view of the type is + -- currently private, it also belongs on the underlying type. + + Set_Is_Volatile (Base_Type (E)); + Set_Is_Volatile (Underlying_Type (E)); + + Set_Treat_As_Volatile (E); + Set_Treat_As_Volatile (Underlying_Type (E)); + + elsif K = N_Object_Declaration + or else (K = N_Component_Declaration + and then Original_Record_Component (E) = E) + then + if Rep_Item_Too_Late (E, N) then + return; + end if; + + if Prag_Id /= Pragma_Volatile then + Set_Is_Atomic (E); + + -- If the object declaration has an explicit initialization, a + -- temporary may have to be created to hold the expression, to + -- ensure that access to the object remain atomic. + + if Nkind (Parent (E)) = N_Object_Declaration + and then Present (Expression (Parent (E))) + then + Set_Has_Delayed_Freeze (E); + end if; + + -- An interesting improvement here. If an object of type X + -- is declared atomic, and the type X is not atomic, that's + -- a pity, since it may not have appropriate alignment etc. + -- We can rescue this in the special case where the object + -- and type are in the same unit by just setting the type + -- as atomic, so that the back end will process it as atomic. + + Utyp := Underlying_Type (Etype (E)); + + if Present (Utyp) + and then Sloc (E) > No_Location + and then Sloc (Utyp) > No_Location + and then + Get_Source_File_Index (Sloc (E)) = + Get_Source_File_Index (Sloc (Underlying_Type (Etype (E)))) + then + Set_Is_Atomic (Underlying_Type (Etype (E))); + end if; + end if; + + Set_Is_Volatile (E); + Set_Treat_As_Volatile (E); + + else + Error_Pragma_Arg + ("inappropriate entity for pragma%", Arg1); + end if; + end Process_Atomic_Shared_Volatile; + + ------------------------------------------- + -- Process_Compile_Time_Warning_Or_Error -- + ------------------------------------------- + + procedure Process_Compile_Time_Warning_Or_Error is + Arg1x : constant Node_Id := Get_Pragma_Arg (Arg1); + + begin + Check_Arg_Count (2); + Check_No_Identifiers; + Check_Arg_Is_Static_Expression (Arg2, Standard_String); + Analyze_And_Resolve (Arg1x, Standard_Boolean); + + if Compile_Time_Known_Value (Arg1x) then + if Is_True (Expr_Value (Get_Pragma_Arg (Arg1))) then + declare + Str : constant String_Id := + Strval (Get_Pragma_Arg (Arg2)); + Len : constant Int := String_Length (Str); + Cont : Boolean; + Ptr : Nat; + CC : Char_Code; + C : Character; + Cent : constant Entity_Id := + Cunit_Entity (Current_Sem_Unit); + + Force : constant Boolean := + Prag_Id = Pragma_Compile_Time_Warning + and then + Is_Spec_Name (Unit_Name (Current_Sem_Unit)) + and then (Ekind (Cent) /= E_Package + or else not In_Private_Part (Cent)); + -- Set True if this is the warning case, and we are in the + -- visible part of a package spec, or in a subprogram spec, + -- in which case we want to force the client to see the + -- warning, even though it is not in the main unit. + + begin + -- Loop through segments of message separated by line + -- feeds. We output these segments as separate messages + -- with continuation marks for all but the first. + + Cont := False; + Ptr := 1; + loop + Error_Msg_Strlen := 0; + + -- Loop to copy characters from argument to error + -- message string buffer. + + loop + exit when Ptr > Len; + CC := Get_String_Char (Str, Ptr); + Ptr := Ptr + 1; + + -- Ignore wide chars ??? else store character + + if In_Character_Range (CC) then + C := Get_Character (CC); + exit when C = ASCII.LF; + Error_Msg_Strlen := Error_Msg_Strlen + 1; + Error_Msg_String (Error_Msg_Strlen) := C; + end if; + end loop; + + -- Here with one line ready to go + + Error_Msg_Warn := Prag_Id = Pragma_Compile_Time_Warning; + + -- If this is a warning in a spec, then we want clients + -- to see the warning, so mark the message with the + -- special sequence !! to force the warning. In the case + -- of a package spec, we do not force this if we are in + -- the private part of the spec. + + if Force then + if Cont = False then + Error_Msg_N ("<~!!", Arg1); + Cont := True; + else + Error_Msg_N ("\<~!!", Arg1); + end if; + + -- Error, rather than warning, or in a body, so we do not + -- need to force visibility for client (error will be + -- output in any case, and this is the situation in which + -- we do not want a client to get a warning, since the + -- warning is in the body or the spec private part. + + else + if Cont = False then + Error_Msg_N ("<~", Arg1); + Cont := True; + else + Error_Msg_N ("\<~", Arg1); + end if; + end if; + + exit when Ptr > Len; + end loop; + end; + end if; + end if; + end Process_Compile_Time_Warning_Or_Error; + + ------------------------ + -- Process_Convention -- + ------------------------ + + procedure Process_Convention + (C : out Convention_Id; + E : out Entity_Id) + is + Id : Node_Id; + E1 : Entity_Id; + Cname : Name_Id; + Comp_Unit : Unit_Number_Type; + + procedure Set_Convention_From_Pragma (E : Entity_Id); + -- Set convention in entity E, and also flag that the entity has a + -- convention pragma. If entity is for a private or incomplete type, + -- also set convention and flag on underlying type. This procedure + -- also deals with the special case of C_Pass_By_Copy convention. + + -------------------------------- + -- Set_Convention_From_Pragma -- + -------------------------------- + + procedure Set_Convention_From_Pragma (E : Entity_Id) is + begin + -- Ada 2005 (AI-430): Check invalid attempt to change convention + -- for an overridden dispatching operation. Technically this is + -- an amendment and should only be done in Ada 2005 mode. However, + -- this is clearly a mistake, since the problem that is addressed + -- by this AI is that there is a clear gap in the RM! + + if Is_Dispatching_Operation (E) + and then Present (Overridden_Operation (E)) + and then C /= Convention (Overridden_Operation (E)) + then + Error_Pragma_Arg + ("cannot change convention for " & + "overridden dispatching operation", + Arg1); + end if; + + -- Set the convention + + Set_Convention (E, C); + Set_Has_Convention_Pragma (E); + + if Is_Incomplete_Or_Private_Type (E) then + Set_Convention (Underlying_Type (E), C); + Set_Has_Convention_Pragma (Underlying_Type (E), True); + end if; + + -- A class-wide type should inherit the convention of + -- the specific root type (although this isn't specified + -- clearly by the RM). + + if Is_Type (E) and then Present (Class_Wide_Type (E)) then + Set_Convention (Class_Wide_Type (E), C); + end if; + + -- If the entity is a record type, then check for special case of + -- C_Pass_By_Copy, which is treated the same as C except that the + -- special record flag is set. This convention is only permitted + -- on record types (see AI95-00131). + + if Cname = Name_C_Pass_By_Copy then + if Is_Record_Type (E) then + Set_C_Pass_By_Copy (Base_Type (E)); + elsif Is_Incomplete_Or_Private_Type (E) + and then Is_Record_Type (Underlying_Type (E)) + then + Set_C_Pass_By_Copy (Base_Type (Underlying_Type (E))); + else + Error_Pragma_Arg + ("C_Pass_By_Copy convention allowed only for record type", + Arg2); + end if; + end if; + + -- If the entity is a derived boolean type, check for the + -- special case of convention C, C++, or Fortran, where we + -- consider any nonzero value to represent true. + + if Is_Discrete_Type (E) + and then Root_Type (Etype (E)) = Standard_Boolean + and then + (C = Convention_C + or else + C = Convention_CPP + or else + C = Convention_Fortran) + then + Set_Nonzero_Is_True (Base_Type (E)); + end if; + end Set_Convention_From_Pragma; + + -- Start of processing for Process_Convention + + begin + Check_At_Least_N_Arguments (2); + Check_Optional_Identifier (Arg1, Name_Convention); + Check_Arg_Is_Identifier (Arg1); + Cname := Chars (Expression (Arg1)); + + -- C_Pass_By_Copy is treated as a synonym for convention C + -- (this is tested again below to set the critical flag) + + if Cname = Name_C_Pass_By_Copy then + C := Convention_C; + + -- Otherwise we must have something in the standard convention list + + elsif Is_Convention_Name (Cname) then + C := Get_Convention_Id (Chars (Expression (Arg1))); + + -- In DEC VMS, it seems that there is an undocumented feature that + -- any unrecognized convention is treated as the default, which for + -- us is convention C. It does not seem so terrible to do this + -- unconditionally, silently in the VMS case, and with a warning + -- in the non-VMS case. + + else + if Warn_On_Export_Import and not OpenVMS_On_Target then + Error_Msg_N + ("?unrecognized convention name, C assumed", + Expression (Arg1)); + end if; + + C := Convention_C; + end if; + + Check_Optional_Identifier (Arg2, Name_Entity); + Check_Arg_Is_Local_Name (Arg2); + + Id := Expression (Arg2); + Analyze (Id); + + if not Is_Entity_Name (Id) then + Error_Pragma_Arg ("entity name required", Arg2); + end if; + + E := Entity (Id); + + -- Go to renamed subprogram if present, since convention applies to + -- the actual renamed entity, not to the renaming entity. If the + -- subprogram is inherited, go to parent subprogram. + + if Is_Subprogram (E) + and then Present (Alias (E)) + then + if Nkind (Parent (Declaration_Node (E))) = + N_Subprogram_Renaming_Declaration + then + if Scope (E) /= Scope (Alias (E)) then + Error_Pragma_Ref + ("cannot apply pragma% to non-local renaming&#", E); + end if; + E := Alias (E); + + elsif Nkind_In (Parent (E), N_Full_Type_Declaration, + N_Private_Extension_Declaration) + and then Scope (E) = Scope (Alias (E)) + then + E := Alias (E); + end if; + end if; + + -- Check that we are not applying this to a specless body + + if Is_Subprogram (E) + and then Nkind (Parent (Declaration_Node (E))) = N_Subprogram_Body + then + Error_Pragma + ("pragma% requires separate spec and must come before body"); + end if; + + -- Check that we are not applying this to a named constant + + if Ekind (E) = E_Named_Integer + or else + Ekind (E) = E_Named_Real + then + Error_Msg_Name_1 := Pname; + Error_Msg_N + ("cannot apply pragma% to named constant!", + Get_Pragma_Arg (Arg2)); + Error_Pragma_Arg + ("\supply appropriate type for&!", Arg2); + end if; + + if Ekind (E) = E_Enumeration_Literal then + Error_Pragma ("enumeration literal not allowed for pragma%"); + end if; + + -- Check for rep item appearing too early or too late + + if Etype (E) = Any_Type + or else Rep_Item_Too_Early (E, N) + then + raise Pragma_Exit; + else + E := Underlying_Type (E); + end if; + + if Rep_Item_Too_Late (E, N) then + raise Pragma_Exit; + end if; + + if Has_Convention_Pragma (E) then + Error_Pragma_Arg + ("at most one Convention/Export/Import pragma is allowed", Arg2); + + elsif Convention (E) = Convention_Protected + or else Ekind (Scope (E)) = E_Protected_Type + then + Error_Pragma_Arg + ("a protected operation cannot be given a different convention", + Arg2); + end if; + + -- For Intrinsic, a subprogram is required + + if C = Convention_Intrinsic + and then not Is_Subprogram (E) + and then not Is_Generic_Subprogram (E) + then + Error_Pragma_Arg + ("second argument of pragma% must be a subprogram", Arg2); + end if; + + -- For Stdcall, a subprogram, variable or subprogram type is required + + if C = Convention_Stdcall + and then not Is_Subprogram (E) + and then not Is_Generic_Subprogram (E) + and then Ekind (E) /= E_Variable + and then not + (Is_Access_Type (E) + and then Ekind (Designated_Type (E)) = E_Subprogram_Type) + then + Error_Pragma_Arg + ("second argument of pragma% must be subprogram (type)", + Arg2); + end if; + + if not Is_Subprogram (E) + and then not Is_Generic_Subprogram (E) + then + Set_Convention_From_Pragma (E); + + if Is_Type (E) then + + Check_First_Subtype (Arg2); + Set_Convention_From_Pragma (Base_Type (E)); + + -- For subprograms, we must set the convention on the + -- internally generated directly designated type as well. + + if Ekind (E) = E_Access_Subprogram_Type then + Set_Convention_From_Pragma (Directly_Designated_Type (E)); + end if; + end if; + + -- For the subprogram case, set proper convention for all homonyms + -- in same scope and the same declarative part, i.e. the same + -- compilation unit. + + else + Comp_Unit := Get_Source_Unit (E); + Set_Convention_From_Pragma (E); + + -- Treat a pragma Import as an implicit body, for GPS use + + if Prag_Id = Pragma_Import then + Generate_Reference (E, Id, 'b'); + end if; + + E1 := E; + loop + E1 := Homonym (E1); + exit when No (E1) or else Scope (E1) /= Current_Scope; + + -- Do not set the pragma on inherited operations or on + -- formal subprograms. + + if Comes_From_Source (E1) + and then Comp_Unit = Get_Source_Unit (E1) + and then not Is_Formal_Subprogram (E1) + and then Nkind (Original_Node (Parent (E1))) /= + N_Full_Type_Declaration + then + if Present (Alias (E1)) + and then Scope (E1) /= Scope (Alias (E1)) + then + Error_Pragma_Ref + ("cannot apply pragma% to non-local renaming&#", E1); + end if; + Set_Convention_From_Pragma (E1); + + if Prag_Id = Pragma_Import then + Generate_Reference (E, Id, 'b'); + end if; + end if; + end loop; + end if; + end Process_Convention; + + ----------------------------------------------------- + -- Process_Extended_Import_Export_Exception_Pragma -- + ----------------------------------------------------- + + procedure Process_Extended_Import_Export_Exception_Pragma + (Arg_Internal : Node_Id; + Arg_External : Node_Id; + Arg_Form : Node_Id; + Arg_Code : Node_Id) + is + Def_Id : Entity_Id; + Code_Val : Uint; + + begin + if not OpenVMS_On_Target then + Error_Pragma + ("?pragma% ignored (applies only to Open'V'M'S)"); + end if; + + Process_Extended_Import_Export_Internal_Arg (Arg_Internal); + Def_Id := Entity (Arg_Internal); + + if Ekind (Def_Id) /= E_Exception then + Error_Pragma_Arg + ("pragma% must refer to declared exception", Arg_Internal); + end if; + + Set_Extended_Import_Export_External_Name (Def_Id, Arg_External); + + if Present (Arg_Form) then + Check_Arg_Is_One_Of (Arg_Form, Name_Ada, Name_VMS); + end if; + + if Present (Arg_Form) + and then Chars (Arg_Form) = Name_Ada + then + null; + else + Set_Is_VMS_Exception (Def_Id); + Set_Exception_Code (Def_Id, No_Uint); + end if; + + if Present (Arg_Code) then + if not Is_VMS_Exception (Def_Id) then + Error_Pragma_Arg + ("Code option for pragma% not allowed for Ada case", + Arg_Code); + end if; + + Check_Arg_Is_Static_Expression (Arg_Code, Any_Integer); + Code_Val := Expr_Value (Arg_Code); + + if not UI_Is_In_Int_Range (Code_Val) then + Error_Pragma_Arg + ("Code option for pragma% must be in 32-bit range", + Arg_Code); + + else + Set_Exception_Code (Def_Id, Code_Val); + end if; + end if; + end Process_Extended_Import_Export_Exception_Pragma; + + ------------------------------------------------- + -- Process_Extended_Import_Export_Internal_Arg -- + ------------------------------------------------- + + procedure Process_Extended_Import_Export_Internal_Arg + (Arg_Internal : Node_Id := Empty) + is + begin + if No (Arg_Internal) then + Error_Pragma ("Internal parameter required for pragma%"); + end if; + + if Nkind (Arg_Internal) = N_Identifier then + null; + + elsif Nkind (Arg_Internal) = N_Operator_Symbol + and then (Prag_Id = Pragma_Import_Function + or else + Prag_Id = Pragma_Export_Function) + then + null; + + else + Error_Pragma_Arg + ("wrong form for Internal parameter for pragma%", Arg_Internal); + end if; + + Check_Arg_Is_Local_Name (Arg_Internal); + end Process_Extended_Import_Export_Internal_Arg; + + -------------------------------------------------- + -- Process_Extended_Import_Export_Object_Pragma -- + -------------------------------------------------- + + procedure Process_Extended_Import_Export_Object_Pragma + (Arg_Internal : Node_Id; + Arg_External : Node_Id; + Arg_Size : Node_Id) + is + Def_Id : Entity_Id; + + begin + Process_Extended_Import_Export_Internal_Arg (Arg_Internal); + Def_Id := Entity (Arg_Internal); + + if Ekind (Def_Id) /= E_Constant + and then Ekind (Def_Id) /= E_Variable + then + Error_Pragma_Arg + ("pragma% must designate an object", Arg_Internal); + end if; + + if Has_Rep_Pragma (Def_Id, Name_Common_Object) + or else + Has_Rep_Pragma (Def_Id, Name_Psect_Object) + then + Error_Pragma_Arg + ("previous Common/Psect_Object applies, pragma % not permitted", + Arg_Internal); + end if; + + if Rep_Item_Too_Late (Def_Id, N) then + raise Pragma_Exit; + end if; + + Set_Extended_Import_Export_External_Name (Def_Id, Arg_External); + + if Present (Arg_Size) then + Check_Arg_Is_External_Name (Arg_Size); + end if; + + -- Export_Object case + + if Prag_Id = Pragma_Export_Object then + if not Is_Library_Level_Entity (Def_Id) then + Error_Pragma_Arg + ("argument for pragma% must be library level entity", + Arg_Internal); + end if; + + if Ekind (Current_Scope) = E_Generic_Package then + Error_Pragma ("pragma& cannot appear in a generic unit"); + end if; + + if not Size_Known_At_Compile_Time (Etype (Def_Id)) then + Error_Pragma_Arg + ("exported object must have compile time known size", + Arg_Internal); + end if; + + if Warn_On_Export_Import and then Is_Exported (Def_Id) then + Error_Msg_N + ("?duplicate Export_Object pragma", N); + else + Set_Exported (Def_Id, Arg_Internal); + end if; + + -- Import_Object case + + else + if Is_Concurrent_Type (Etype (Def_Id)) then + Error_Pragma_Arg + ("cannot use pragma% for task/protected object", + Arg_Internal); + end if; + + if Ekind (Def_Id) = E_Constant then + Error_Pragma_Arg + ("cannot import a constant", Arg_Internal); + end if; + + if Warn_On_Export_Import + and then Has_Discriminants (Etype (Def_Id)) + then + Error_Msg_N + ("imported value must be initialized?", Arg_Internal); + end if; + + if Warn_On_Export_Import + and then Is_Access_Type (Etype (Def_Id)) + then + Error_Pragma_Arg + ("cannot import object of an access type?", Arg_Internal); + end if; + + if Warn_On_Export_Import + and then Is_Imported (Def_Id) + then + Error_Msg_N + ("?duplicate Import_Object pragma", N); + + -- Check for explicit initialization present. Note that an + -- initialization that generated by the code generator, e.g. + -- for an access type, does not count here. + + elsif Present (Expression (Parent (Def_Id))) + and then + Comes_From_Source + (Original_Node (Expression (Parent (Def_Id)))) + then + Error_Msg_Sloc := Sloc (Def_Id); + Error_Pragma_Arg + ("imported entities cannot be initialized (RM B.1(24))", + "\no initialization allowed for & declared#", Arg1); + else + Set_Imported (Def_Id); + Note_Possible_Modification (Arg_Internal, Sure => False); + end if; + end if; + end Process_Extended_Import_Export_Object_Pragma; + + ------------------------------------------------------ + -- Process_Extended_Import_Export_Subprogram_Pragma -- + ------------------------------------------------------ + + procedure Process_Extended_Import_Export_Subprogram_Pragma + (Arg_Internal : Node_Id; + Arg_External : Node_Id; + Arg_Parameter_Types : Node_Id; + Arg_Result_Type : Node_Id := Empty; + Arg_Mechanism : Node_Id; + Arg_Result_Mechanism : Node_Id := Empty; + Arg_First_Optional_Parameter : Node_Id := Empty) + is + Ent : Entity_Id; + Def_Id : Entity_Id; + Hom_Id : Entity_Id; + Formal : Entity_Id; + Ambiguous : Boolean; + Match : Boolean; + Dval : Node_Id; + + function Same_Base_Type + (Ptype : Node_Id; + Formal : Entity_Id) return Boolean; + -- Determines if Ptype references the type of Formal. Note that + -- only the base types need to match according to the spec. Ptype + -- here is the argument from the pragma, which is either a type + -- name, or an access attribute. + + -------------------- + -- Same_Base_Type -- + -------------------- + + function Same_Base_Type + (Ptype : Node_Id; + Formal : Entity_Id) return Boolean + is + Ftyp : constant Entity_Id := Base_Type (Etype (Formal)); + Pref : Node_Id; + + begin + -- Case where pragma argument is typ'Access + + if Nkind (Ptype) = N_Attribute_Reference + and then Attribute_Name (Ptype) = Name_Access + then + Pref := Prefix (Ptype); + Find_Type (Pref); + + if not Is_Entity_Name (Pref) + or else Entity (Pref) = Any_Type + then + raise Pragma_Exit; + end if; + + -- We have a match if the corresponding argument is of an + -- anonymous access type, and its designated type matches + -- the type of the prefix of the access attribute + + return Ekind (Ftyp) = E_Anonymous_Access_Type + and then Base_Type (Entity (Pref)) = + Base_Type (Etype (Designated_Type (Ftyp))); + + -- Case where pragma argument is a type name + + else + Find_Type (Ptype); + + if not Is_Entity_Name (Ptype) + or else Entity (Ptype) = Any_Type + then + raise Pragma_Exit; + end if; + + -- We have a match if the corresponding argument is of + -- the type given in the pragma (comparing base types) + + return Base_Type (Entity (Ptype)) = Ftyp; + end if; + end Same_Base_Type; + + -- Start of processing for + -- Process_Extended_Import_Export_Subprogram_Pragma + + begin + Process_Extended_Import_Export_Internal_Arg (Arg_Internal); + Ent := Empty; + Ambiguous := False; + + -- Loop through homonyms (overloadings) of the entity + + Hom_Id := Entity (Arg_Internal); + while Present (Hom_Id) loop + Def_Id := Get_Base_Subprogram (Hom_Id); + + -- We need a subprogram in the current scope + + if not Is_Subprogram (Def_Id) + or else Scope (Def_Id) /= Current_Scope + then + null; + + else + Match := True; + + -- Pragma cannot apply to subprogram body + + if Is_Subprogram (Def_Id) + and then Nkind (Parent (Declaration_Node (Def_Id))) = + N_Subprogram_Body + then + Error_Pragma + ("pragma% requires separate spec" + & " and must come before body"); + end if; + + -- Test result type if given, note that the result type + -- parameter can only be present for the function cases. + + if Present (Arg_Result_Type) + and then not Same_Base_Type (Arg_Result_Type, Def_Id) + then + Match := False; + + elsif Etype (Def_Id) /= Standard_Void_Type + and then + (Pname = Name_Export_Procedure + or else + Pname = Name_Import_Procedure) + then + Match := False; + + -- Test parameter types if given. Note that this parameter + -- has not been analyzed (and must not be, since it is + -- semantic nonsense), so we get it as the parser left it. + + elsif Present (Arg_Parameter_Types) then + Check_Matching_Types : declare + Formal : Entity_Id; + Ptype : Node_Id; + + begin + Formal := First_Formal (Def_Id); + + if Nkind (Arg_Parameter_Types) = N_Null then + if Present (Formal) then + Match := False; + end if; + + -- A list of one type, e.g. (List) is parsed as + -- a parenthesized expression. + + elsif Nkind (Arg_Parameter_Types) /= N_Aggregate + and then Paren_Count (Arg_Parameter_Types) = 1 + then + if No (Formal) + or else Present (Next_Formal (Formal)) + then + Match := False; + else + Match := + Same_Base_Type (Arg_Parameter_Types, Formal); + end if; + + -- A list of more than one type is parsed as a aggregate + + elsif Nkind (Arg_Parameter_Types) = N_Aggregate + and then Paren_Count (Arg_Parameter_Types) = 0 + then + Ptype := First (Expressions (Arg_Parameter_Types)); + while Present (Ptype) or else Present (Formal) loop + if No (Ptype) + or else No (Formal) + or else not Same_Base_Type (Ptype, Formal) + then + Match := False; + exit; + else + Next_Formal (Formal); + Next (Ptype); + end if; + end loop; + + -- Anything else is of the wrong form + + else + Error_Pragma_Arg + ("wrong form for Parameter_Types parameter", + Arg_Parameter_Types); + end if; + end Check_Matching_Types; + end if; + + -- Match is now False if the entry we found did not match + -- either a supplied Parameter_Types or Result_Types argument + + if Match then + if No (Ent) then + Ent := Def_Id; + + -- Ambiguous case, the flag Ambiguous shows if we already + -- detected this and output the initial messages. + + else + if not Ambiguous then + Ambiguous := True; + Error_Msg_Name_1 := Pname; + Error_Msg_N + ("pragma% does not uniquely identify subprogram!", + N); + Error_Msg_Sloc := Sloc (Ent); + Error_Msg_N ("matching subprogram #!", N); + Ent := Empty; + end if; + + Error_Msg_Sloc := Sloc (Def_Id); + Error_Msg_N ("matching subprogram #!", N); + end if; + end if; + end if; + + Hom_Id := Homonym (Hom_Id); + end loop; + + -- See if we found an entry + + if No (Ent) then + if not Ambiguous then + if Is_Generic_Subprogram (Entity (Arg_Internal)) then + Error_Pragma + ("pragma% cannot be given for generic subprogram"); + else + Error_Pragma + ("pragma% does not identify local subprogram"); + end if; + end if; + + return; + end if; + + -- Import pragmas must be for imported entities + + if Prag_Id = Pragma_Import_Function + or else + Prag_Id = Pragma_Import_Procedure + or else + Prag_Id = Pragma_Import_Valued_Procedure + then + if not Is_Imported (Ent) then + Error_Pragma + ("pragma Import or Interface must precede pragma%"); + end if; + + -- Here we have the Export case which can set the entity as exported + + -- But does not do so if the specified external name is null, since + -- that is taken as a signal in DEC Ada 83 (with which we want to be + -- compatible) to request no external name. + + elsif Nkind (Arg_External) = N_String_Literal + and then String_Length (Strval (Arg_External)) = 0 + then + null; + + -- In all other cases, set entity as exported + + else + Set_Exported (Ent, Arg_Internal); + end if; + + -- Special processing for Valued_Procedure cases + + if Prag_Id = Pragma_Import_Valued_Procedure + or else + Prag_Id = Pragma_Export_Valued_Procedure + then + Formal := First_Formal (Ent); + + if No (Formal) then + Error_Pragma + ("at least one parameter required for pragma%"); + + elsif Ekind (Formal) /= E_Out_Parameter then + Error_Pragma + ("first parameter must have mode out for pragma%"); + + else + Set_Is_Valued_Procedure (Ent); + end if; + end if; + + Set_Extended_Import_Export_External_Name (Ent, Arg_External); + + -- Process Result_Mechanism argument if present. We have already + -- checked that this is only allowed for the function case. + + if Present (Arg_Result_Mechanism) then + Set_Mechanism_Value (Ent, Arg_Result_Mechanism); + end if; + + -- Process Mechanism parameter if present. Note that this parameter + -- is not analyzed, and must not be analyzed since it is semantic + -- nonsense, so we get it in exactly as the parser left it. + + if Present (Arg_Mechanism) then + declare + Formal : Entity_Id; + Massoc : Node_Id; + Mname : Node_Id; + Choice : Node_Id; + + begin + -- A single mechanism association without a formal parameter + -- name is parsed as a parenthesized expression. All other + -- cases are parsed as aggregates, so we rewrite the single + -- parameter case as an aggregate for consistency. + + if Nkind (Arg_Mechanism) /= N_Aggregate + and then Paren_Count (Arg_Mechanism) = 1 + then + Rewrite (Arg_Mechanism, + Make_Aggregate (Sloc (Arg_Mechanism), + Expressions => New_List ( + Relocate_Node (Arg_Mechanism)))); + end if; + + -- Case of only mechanism name given, applies to all formals + + if Nkind (Arg_Mechanism) /= N_Aggregate then + Formal := First_Formal (Ent); + while Present (Formal) loop + Set_Mechanism_Value (Formal, Arg_Mechanism); + Next_Formal (Formal); + end loop; + + -- Case of list of mechanism associations given + + else + if Null_Record_Present (Arg_Mechanism) then + Error_Pragma_Arg + ("inappropriate form for Mechanism parameter", + Arg_Mechanism); + end if; + + -- Deal with positional ones first + + Formal := First_Formal (Ent); + + if Present (Expressions (Arg_Mechanism)) then + Mname := First (Expressions (Arg_Mechanism)); + while Present (Mname) loop + if No (Formal) then + Error_Pragma_Arg + ("too many mechanism associations", Mname); + end if; + + Set_Mechanism_Value (Formal, Mname); + Next_Formal (Formal); + Next (Mname); + end loop; + end if; + + -- Deal with named entries + + if Present (Component_Associations (Arg_Mechanism)) then + Massoc := First (Component_Associations (Arg_Mechanism)); + while Present (Massoc) loop + Choice := First (Choices (Massoc)); + + if Nkind (Choice) /= N_Identifier + or else Present (Next (Choice)) + then + Error_Pragma_Arg + ("incorrect form for mechanism association", + Massoc); + end if; + + Formal := First_Formal (Ent); + loop + if No (Formal) then + Error_Pragma_Arg + ("parameter name & not present", Choice); + end if; + + if Chars (Choice) = Chars (Formal) then + Set_Mechanism_Value + (Formal, Expression (Massoc)); + + -- Set entity on identifier for ASIS + + Set_Entity (Choice, Formal); + + exit; + end if; + + Next_Formal (Formal); + end loop; + + Next (Massoc); + end loop; + end if; + end if; + end; + end if; + + -- Process First_Optional_Parameter argument if present. We have + -- already checked that this is only allowed for the Import case. + + if Present (Arg_First_Optional_Parameter) then + if Nkind (Arg_First_Optional_Parameter) /= N_Identifier then + Error_Pragma_Arg + ("first optional parameter must be formal parameter name", + Arg_First_Optional_Parameter); + end if; + + Formal := First_Formal (Ent); + loop + if No (Formal) then + Error_Pragma_Arg + ("specified formal parameter& not found", + Arg_First_Optional_Parameter); + end if; + + exit when Chars (Formal) = + Chars (Arg_First_Optional_Parameter); + + Next_Formal (Formal); + end loop; + + Set_First_Optional_Parameter (Ent, Formal); + + -- Check specified and all remaining formals have right form + + while Present (Formal) loop + if Ekind (Formal) /= E_In_Parameter then + Error_Msg_NE + ("optional formal& is not of mode in!", + Arg_First_Optional_Parameter, Formal); + + else + Dval := Default_Value (Formal); + + if No (Dval) then + Error_Msg_NE + ("optional formal& does not have default value!", + Arg_First_Optional_Parameter, Formal); + + elsif Compile_Time_Known_Value_Or_Aggr (Dval) then + null; + + else + Error_Msg_FE + ("default value for optional formal& is non-static!", + Arg_First_Optional_Parameter, Formal); + end if; + end if; + + Set_Is_Optional_Parameter (Formal); + Next_Formal (Formal); + end loop; + end if; + end Process_Extended_Import_Export_Subprogram_Pragma; + + -------------------------- + -- Process_Generic_List -- + -------------------------- + + procedure Process_Generic_List is + Arg : Node_Id; + Exp : Node_Id; + + begin + Check_No_Identifiers; + Check_At_Least_N_Arguments (1); + + Arg := Arg1; + while Present (Arg) loop + Exp := Expression (Arg); + Analyze (Exp); + + if not Is_Entity_Name (Exp) + or else + (not Is_Generic_Instance (Entity (Exp)) + and then + not Is_Generic_Unit (Entity (Exp))) + then + Error_Pragma_Arg + ("pragma% argument must be name of generic unit/instance", + Arg); + end if; + + Next (Arg); + end loop; + end Process_Generic_List; + + --------------------------------- + -- Process_Import_Or_Interface -- + --------------------------------- + + procedure Process_Import_Or_Interface is + C : Convention_Id; + Def_Id : Entity_Id; + Hom_Id : Entity_Id; + + begin + Process_Convention (C, Def_Id); + Kill_Size_Check_Code (Def_Id); + Note_Possible_Modification (Expression (Arg2), Sure => False); + + if Ekind (Def_Id) = E_Variable + or else + Ekind (Def_Id) = E_Constant + then + -- We do not permit Import to apply to a renaming declaration + + if Present (Renamed_Object (Def_Id)) then + Error_Pragma_Arg + ("pragma% not allowed for object renaming", Arg2); + + -- User initialization is not allowed for imported object, but + -- the object declaration may contain a default initialization, + -- that will be discarded. Note that an explicit initialization + -- only counts if it comes from source, otherwise it is simply + -- the code generator making an implicit initialization explicit. + + elsif Present (Expression (Parent (Def_Id))) + and then Comes_From_Source (Expression (Parent (Def_Id))) + then + Error_Msg_Sloc := Sloc (Def_Id); + Error_Pragma_Arg + ("no initialization allowed for declaration of& #", + "\imported entities cannot be initialized (RM B.1(24))", + Arg2); + + else + Set_Imported (Def_Id); + Process_Interface_Name (Def_Id, Arg3, Arg4); + + -- Note that we do not set Is_Public here. That's because we + -- only want to set it if there is no address clause, and we + -- don't know that yet, so we delay that processing till + -- freeze time. + + -- pragma Import completes deferred constants + + if Ekind (Def_Id) = E_Constant then + Set_Has_Completion (Def_Id); + end if; + + -- It is not possible to import a constant of an unconstrained + -- array type (e.g. string) because there is no simple way to + -- write a meaningful subtype for it. + + if Is_Array_Type (Etype (Def_Id)) + and then not Is_Constrained (Etype (Def_Id)) + then + Error_Msg_NE + ("imported constant& must have a constrained subtype", + N, Def_Id); + end if; + end if; + + elsif Is_Subprogram (Def_Id) + or else Is_Generic_Subprogram (Def_Id) + then + -- If the name is overloaded, pragma applies to all of the + -- denoted entities in the same declarative part. + + Hom_Id := Def_Id; + while Present (Hom_Id) loop + Def_Id := Get_Base_Subprogram (Hom_Id); + + -- Ignore inherited subprograms because the pragma will + -- apply to the parent operation, which is the one called. + + if Is_Overloadable (Def_Id) + and then Present (Alias (Def_Id)) + then + null; + + -- If it is not a subprogram, it must be in an outer + -- scope and pragma does not apply. + + elsif not Is_Subprogram (Def_Id) + and then not Is_Generic_Subprogram (Def_Id) + then + null; + + -- Verify that the homonym is in the same declarative + -- part (not just the same scope). + + elsif Parent (Unit_Declaration_Node (Def_Id)) /= Parent (N) + and then Nkind (Parent (N)) /= N_Compilation_Unit_Aux + then + exit; + + else + Set_Imported (Def_Id); + + -- Special processing for Convention_Intrinsic + + if C = Convention_Intrinsic then + + -- Link_Name argument not allowed for intrinsic + + if Present (Arg3) + and then Chars (Arg3) = Name_Link_Name + then + Arg4 := Arg3; + end if; + + if Present (Arg4) then + Error_Pragma_Arg + ("Link_Name argument not allowed for " & + "Import Intrinsic", + Arg4); + end if; + + Set_Is_Intrinsic_Subprogram (Def_Id); + + -- If no external name is present, then check that + -- this is a valid intrinsic subprogram. If an external + -- name is present, then this is handled by the back end. + + if No (Arg3) then + Check_Intrinsic_Subprogram (Def_Id, Expression (Arg2)); + end if; + end if; + + -- All interfaced procedures need an external symbol + -- created for them since they are always referenced + -- from another object file. + + Set_Is_Public (Def_Id); + + -- Verify that the subprogram does not have a completion + -- through a renaming declaration. For other completions + -- the pragma appears as a too late representation. + + declare + Decl : constant Node_Id := Unit_Declaration_Node (Def_Id); + + begin + if Present (Decl) + and then Nkind (Decl) = N_Subprogram_Declaration + and then Present (Corresponding_Body (Decl)) + and then Nkind (Unit_Declaration_Node + (Corresponding_Body (Decl))) = + N_Subprogram_Renaming_Declaration + then + Error_Msg_Sloc := Sloc (Def_Id); + Error_Msg_NE + ("cannot import&, renaming already provided for " & + "declaration #", N, Def_Id); + end if; + end; + + Set_Has_Completion (Def_Id); + Process_Interface_Name (Def_Id, Arg3, Arg4); + end if; + + if Is_Compilation_Unit (Hom_Id) then + + -- Its possible homonyms are not affected by the pragma. + -- Such homonyms might be present in the context of other + -- units being compiled. + + exit; + + else + Hom_Id := Homonym (Hom_Id); + end if; + end loop; + + -- When the convention is Java or CIL, we also allow Import to be + -- given for packages, generic packages, exceptions, and record + -- components. + + elsif (C = Convention_Java or else C = Convention_CIL) + and then + (Is_Package_Or_Generic_Package (Def_Id) + or else Ekind (Def_Id) = E_Exception + or else Nkind (Parent (Def_Id)) = N_Component_Declaration) + then + Set_Imported (Def_Id); + Set_Is_Public (Def_Id); + Process_Interface_Name (Def_Id, Arg3, Arg4); + + -- Import a CPP class + + elsif Is_Record_Type (Def_Id) + and then C = Convention_CPP + then + if not Is_Tagged_Type (Def_Id) then + Error_Msg_Sloc := Sloc (Def_Id); + Error_Pragma_Arg ("imported 'C'P'P type must be tagged", Arg2); + + else + -- Types treated as CPP classes are treated as limited, but we + -- don't require them to be declared this way. A warning is + -- issued to encourage the user to declare them as limited. + -- This is not an error, for compatibility reasons, because + -- these types have been supported this way for some time. + + if not Is_Limited_Type (Def_Id) then + Error_Msg_N + ("imported 'C'P'P type should be " & + "explicitly declared limited?", + Get_Pragma_Arg (Arg2)); + Error_Msg_N + ("\type will be considered limited", + Get_Pragma_Arg (Arg2)); + end if; + + Set_Is_CPP_Class (Def_Id); + Set_Is_Limited_Record (Def_Id); + end if; + + else + Error_Pragma_Arg + ("second argument of pragma% must be object or subprogram", + Arg2); + end if; + + -- If this pragma applies to a compilation unit, then the unit, + -- which is a subprogram, does not require (or allow) a body. + -- We also do not need to elaborate imported procedures. + + if Nkind (Parent (N)) = N_Compilation_Unit_Aux then + declare + Cunit : constant Node_Id := Parent (Parent (N)); + begin + Set_Body_Required (Cunit, False); + end; + end if; + end Process_Import_Or_Interface; + + -------------------- + -- Process_Inline -- + -------------------- + + procedure Process_Inline (Active : Boolean) is + Assoc : Node_Id; + Decl : Node_Id; + Subp_Id : Node_Id; + Subp : Entity_Id; + Applies : Boolean; + Effective : Boolean := False; + + procedure Make_Inline (Subp : Entity_Id); + -- Subp is the defining unit name of the subprogram + -- declaration. Set the flag, as well as the flag in the + -- corresponding body, if there is one present. + + procedure Set_Inline_Flags (Subp : Entity_Id); + -- Sets Is_Inlined and Has_Pragma_Inline flags for Subp and also + -- Has_Pragma_Inline_Always for the Inline_Always case. + + function Inlining_Not_Possible (Subp : Entity_Id) return Boolean; + -- Returns True if it can be determined at this stage that inlining + -- is not possible, for example if the body is available and contains + -- exception handlers, we prevent inlining, since otherwise we can + -- get undefined symbols at link time. This function also emits a + -- warning if front-end inlining is enabled and the pragma appears + -- too late. + -- + -- ??? is business with link symbols still valid, or does it relate + -- to front end ZCX which is being phased out ??? + + --------------------------- + -- Inlining_Not_Possible -- + --------------------------- + + function Inlining_Not_Possible (Subp : Entity_Id) return Boolean is + Decl : constant Node_Id := Unit_Declaration_Node (Subp); + Stats : Node_Id; + + begin + if Nkind (Decl) = N_Subprogram_Body then + Stats := Handled_Statement_Sequence (Decl); + return Present (Exception_Handlers (Stats)) + or else Present (At_End_Proc (Stats)); + + elsif Nkind (Decl) = N_Subprogram_Declaration + and then Present (Corresponding_Body (Decl)) + then + if Front_End_Inlining + and then Analyzed (Corresponding_Body (Decl)) + then + Error_Msg_N ("pragma appears too late, ignored?", N); + return True; + + -- If the subprogram is a renaming as body, the body is + -- just a call to the renamed subprogram, and inlining is + -- trivially possible. + + elsif + Nkind (Unit_Declaration_Node (Corresponding_Body (Decl))) = + N_Subprogram_Renaming_Declaration + then + return False; + + else + Stats := + Handled_Statement_Sequence + (Unit_Declaration_Node (Corresponding_Body (Decl))); + + return + Present (Exception_Handlers (Stats)) + or else Present (At_End_Proc (Stats)); + end if; + + else + -- If body is not available, assume the best, the check is + -- performed again when compiling enclosing package bodies. + + return False; + end if; + end Inlining_Not_Possible; + + ----------------- + -- Make_Inline -- + ----------------- + + procedure Make_Inline (Subp : Entity_Id) is + Kind : constant Entity_Kind := Ekind (Subp); + Inner_Subp : Entity_Id := Subp; + + begin + -- Ignore if bad type, avoid cascaded error + + if Etype (Subp) = Any_Type then + Applies := True; + return; + + -- Ignore if all inlining is suppressed + + elsif Suppress_All_Inlining then + Applies := True; + return; + + -- If inlining is not possible, for now do not treat as an error + + elsif Inlining_Not_Possible (Subp) then + Applies := True; + return; + + -- Here we have a candidate for inlining, but we must exclude + -- derived operations. Otherwise we would end up trying to inline + -- a phantom declaration, and the result would be to drag in a + -- body which has no direct inlining associated with it. That + -- would not only be inefficient but would also result in the + -- backend doing cross-unit inlining in cases where it was + -- definitely inappropriate to do so. + + -- However, a simple Comes_From_Source test is insufficient, since + -- we do want to allow inlining of generic instances which also do + -- not come from source. We also need to recognize specs + -- generated by the front-end for bodies that carry the pragma. + -- Finally, predefined operators do not come from source but are + -- not inlineable either. + + elsif Is_Generic_Instance (Subp) + or else Nkind (Parent (Parent (Subp))) = N_Subprogram_Declaration + then + null; + + elsif not Comes_From_Source (Subp) + and then Scope (Subp) /= Standard_Standard + then + Applies := True; + return; + end if; + + -- The referenced entity must either be the enclosing entity, + -- or an entity declared within the current open scope. + + if Present (Scope (Subp)) + and then Scope (Subp) /= Current_Scope + and then Subp /= Current_Scope + then + Error_Pragma_Arg + ("argument of% must be entity in current scope", Assoc); + return; + end if; + + -- Processing for procedure, operator or function. + -- If subprogram is aliased (as for an instance) indicate + -- that the renamed entity (if declared in the same unit) + -- is inlined. + + if Is_Subprogram (Subp) then + while Present (Alias (Inner_Subp)) loop + Inner_Subp := Alias (Inner_Subp); + end loop; + + if In_Same_Source_Unit (Subp, Inner_Subp) then + Set_Inline_Flags (Inner_Subp); + + Decl := Parent (Parent (Inner_Subp)); + + if Nkind (Decl) = N_Subprogram_Declaration + and then Present (Corresponding_Body (Decl)) + then + Set_Inline_Flags (Corresponding_Body (Decl)); + + elsif Is_Generic_Instance (Subp) then + + -- Indicate that the body needs to be created for + -- inlining subsequent calls. The instantiation + -- node follows the declaration of the wrapper + -- package created for it. + + if Scope (Subp) /= Standard_Standard + and then + Need_Subprogram_Instance_Body + (Next (Unit_Declaration_Node (Scope (Alias (Subp)))), + Subp) + then + null; + end if; + end if; + end if; + + Applies := True; + + -- For a generic subprogram set flag as well, for use at + -- the point of instantiation, to determine whether the + -- body should be generated. + + elsif Is_Generic_Subprogram (Subp) then + Set_Inline_Flags (Subp); + Applies := True; + + -- Literals are by definition inlined + + elsif Kind = E_Enumeration_Literal then + null; + + -- Anything else is an error + + else + Error_Pragma_Arg + ("expect subprogram name for pragma%", Assoc); + end if; + end Make_Inline; + + ---------------------- + -- Set_Inline_Flags -- + ---------------------- + + procedure Set_Inline_Flags (Subp : Entity_Id) is + begin + if Active then + Set_Is_Inlined (Subp, True); + end if; + + if not Has_Pragma_Inline (Subp) then + Set_Has_Pragma_Inline (Subp); + Effective := True; + end if; + + if Prag_Id = Pragma_Inline_Always then + Set_Has_Pragma_Inline_Always (Subp); + end if; + end Set_Inline_Flags; + + -- Start of processing for Process_Inline + + begin + Check_No_Identifiers; + Check_At_Least_N_Arguments (1); + + if Active then + Inline_Processing_Required := True; + end if; + + Assoc := Arg1; + while Present (Assoc) loop + Subp_Id := Expression (Assoc); + Analyze (Subp_Id); + Applies := False; + + if Is_Entity_Name (Subp_Id) then + Subp := Entity (Subp_Id); + + if Subp = Any_Id then + + -- If previous error, avoid cascaded errors + + Applies := True; + Effective := True; + + else + Make_Inline (Subp); + + while Present (Homonym (Subp)) + and then Scope (Homonym (Subp)) = Current_Scope + loop + Make_Inline (Homonym (Subp)); + Subp := Homonym (Subp); + end loop; + end if; + end if; + + if not Applies then + Error_Pragma_Arg + ("inappropriate argument for pragma%", Assoc); + + elsif not Effective + and then Warn_On_Redundant_Constructs + and then not Suppress_All_Inlining + then + if Inlining_Not_Possible (Subp) then + Error_Msg_NE + ("pragma Inline for& is ignored?", N, Entity (Subp_Id)); + else + Error_Msg_NE + ("pragma Inline for& is redundant?", N, Entity (Subp_Id)); + end if; + end if; + + Next (Assoc); + end loop; + end Process_Inline; + + ---------------------------- + -- Process_Interface_Name -- + ---------------------------- + + procedure Process_Interface_Name + (Subprogram_Def : Entity_Id; + Ext_Arg : Node_Id; + Link_Arg : Node_Id) + is + Ext_Nam : Node_Id; + Link_Nam : Node_Id; + String_Val : String_Id; + + procedure Check_Form_Of_Interface_Name + (SN : Node_Id; + Ext_Name_Case : Boolean); + -- SN is a string literal node for an interface name. This routine + -- performs some minimal checks that the name is reasonable. In + -- particular that no spaces or other obviously incorrect characters + -- appear. This is only a warning, since any characters are allowed. + -- Ext_Name_Case is True for an External_Name, False for a Link_Name. + + ---------------------------------- + -- Check_Form_Of_Interface_Name -- + ---------------------------------- + + procedure Check_Form_Of_Interface_Name + (SN : Node_Id; + Ext_Name_Case : Boolean) + is + S : constant String_Id := Strval (Expr_Value_S (SN)); + SL : constant Nat := String_Length (S); + C : Char_Code; + + begin + if SL = 0 then + Error_Msg_N ("interface name cannot be null string", SN); + end if; + + for J in 1 .. SL loop + C := Get_String_Char (S, J); + + -- Look for dubious character and issue unconditional warning. + -- Definitely dubious if not in character range. + + if not In_Character_Range (C) + + -- For all cases except external names on CLI target, + -- commas, spaces and slashes are dubious (in CLI, we use + -- spaces and commas in external names to specify assembly + -- version and public key). + + or else ((not Ext_Name_Case or else VM_Target /= CLI_Target) + and then (Get_Character (C) = ' ' + or else + Get_Character (C) = ',' + or else + Get_Character (C) = '/' + or else + Get_Character (C) = '\')) + then + Error_Msg + ("?interface name contains illegal character", + Sloc (SN) + Source_Ptr (J)); + end if; + end loop; + end Check_Form_Of_Interface_Name; + + -- Start of processing for Process_Interface_Name + + begin + if No (Link_Arg) then + if No (Ext_Arg) then + if VM_Target = CLI_Target + and then Ekind (Subprogram_Def) = E_Package + and then Nkind (Parent (Subprogram_Def)) = + N_Package_Specification + and then Present (Generic_Parent (Parent (Subprogram_Def))) + then + Set_Interface_Name + (Subprogram_Def, + Interface_Name + (Generic_Parent (Parent (Subprogram_Def)))); + end if; + + return; + + elsif Chars (Ext_Arg) = Name_Link_Name then + Ext_Nam := Empty; + Link_Nam := Expression (Ext_Arg); + + else + Check_Optional_Identifier (Ext_Arg, Name_External_Name); + Ext_Nam := Expression (Ext_Arg); + Link_Nam := Empty; + end if; + + else + Check_Optional_Identifier (Ext_Arg, Name_External_Name); + Check_Optional_Identifier (Link_Arg, Name_Link_Name); + Ext_Nam := Expression (Ext_Arg); + Link_Nam := Expression (Link_Arg); + end if; + + -- Check expressions for external name and link name are static + + if Present (Ext_Nam) then + Check_Arg_Is_Static_Expression (Ext_Nam, Standard_String); + Check_Form_Of_Interface_Name (Ext_Nam, Ext_Name_Case => True); + + -- Verify that external name is not the name of a local entity, + -- which would hide the imported one and could lead to run-time + -- surprises. The problem can only arise for entities declared in + -- a package body (otherwise the external name is fully qualified + -- and will not conflict). + + declare + Nam : Name_Id; + E : Entity_Id; + Par : Node_Id; + + begin + if Prag_Id = Pragma_Import then + String_To_Name_Buffer (Strval (Expr_Value_S (Ext_Nam))); + Nam := Name_Find; + E := Entity_Id (Get_Name_Table_Info (Nam)); + + if Nam /= Chars (Subprogram_Def) + and then Present (E) + and then not Is_Overloadable (E) + and then Is_Immediately_Visible (E) + and then not Is_Imported (E) + and then Ekind (Scope (E)) = E_Package + then + Par := Parent (E); + while Present (Par) loop + if Nkind (Par) = N_Package_Body then + Error_Msg_Sloc := Sloc (E); + Error_Msg_NE + ("imported entity is hidden by & declared#", + Ext_Arg, E); + exit; + end if; + + Par := Parent (Par); + end loop; + end if; + end if; + end; + end if; + + if Present (Link_Nam) then + Check_Arg_Is_Static_Expression (Link_Nam, Standard_String); + Check_Form_Of_Interface_Name (Link_Nam, Ext_Name_Case => False); + end if; + + -- If there is no link name, just set the external name + + if No (Link_Nam) then + Link_Nam := Adjust_External_Name_Case (Expr_Value_S (Ext_Nam)); + + -- For the Link_Name case, the given literal is preceded by an + -- asterisk, which indicates to GCC that the given name should + -- be taken literally, and in particular that no prepending of + -- underlines should occur, even in systems where this is the + -- normal default. + + else + Start_String; + + if VM_Target = No_VM then + Store_String_Char (Get_Char_Code ('*')); + end if; + + String_Val := Strval (Expr_Value_S (Link_Nam)); + Store_String_Chars (String_Val); + Link_Nam := + Make_String_Literal (Sloc (Link_Nam), + Strval => End_String); + end if; + + Set_Encoded_Interface_Name + (Get_Base_Subprogram (Subprogram_Def), Link_Nam); + Check_Duplicated_Export_Name (Link_Nam); + end Process_Interface_Name; + + ----------------------------------------- + -- Process_Interrupt_Or_Attach_Handler -- + ----------------------------------------- + + procedure Process_Interrupt_Or_Attach_Handler is + Arg1_X : constant Node_Id := Expression (Arg1); + Handler_Proc : constant Entity_Id := Entity (Arg1_X); + Proc_Scope : constant Entity_Id := Scope (Handler_Proc); + + begin + Set_Is_Interrupt_Handler (Handler_Proc); + + -- If the pragma is not associated with a handler procedure + -- within a protected type, then it must be for a nonprotected + -- procedure for the AAMP target, in which case we don't + -- associate a representation item with the procedure's scope. + + if Ekind (Proc_Scope) = E_Protected_Type then + if Prag_Id = Pragma_Interrupt_Handler + or else + Prag_Id = Pragma_Attach_Handler + then + Record_Rep_Item (Proc_Scope, N); + end if; + end if; + end Process_Interrupt_Or_Attach_Handler; + + -------------------------------------------------- + -- Process_Restrictions_Or_Restriction_Warnings -- + -------------------------------------------------- + + -- Note: some of the simple identifier cases were handled in par-prag, + -- but it is harmless (and more straightforward) to simply handle all + -- cases here, even if it means we repeat a bit of work in some cases. + + procedure Process_Restrictions_Or_Restriction_Warnings + (Warn : Boolean) + is + Arg : Node_Id; + R_Id : Restriction_Id; + Id : Name_Id; + Expr : Node_Id; + Val : Uint; + + procedure Check_Unit_Name (N : Node_Id); + -- Checks unit name parameter for No_Dependence. Returns if it has + -- an appropriate form, otherwise raises pragma argument error. + + --------------------- + -- Check_Unit_Name -- + --------------------- + + procedure Check_Unit_Name (N : Node_Id) is + begin + if Nkind (N) = N_Selected_Component then + Check_Unit_Name (Prefix (N)); + Check_Unit_Name (Selector_Name (N)); + + elsif Nkind (N) = N_Identifier then + return; + + else + Error_Pragma_Arg + ("wrong form for unit name for No_Dependence", N); + end if; + end Check_Unit_Name; + + -- Start of processing for Process_Restrictions_Or_Restriction_Warnings + + begin + Check_Ada_83_Warning; + Check_At_Least_N_Arguments (1); + Check_Valid_Configuration_Pragma; + + Arg := Arg1; + while Present (Arg) loop + Id := Chars (Arg); + Expr := Expression (Arg); + + -- Case of no restriction identifier present + + if Id = No_Name then + if Nkind (Expr) /= N_Identifier then + Error_Pragma_Arg + ("invalid form for restriction", Arg); + end if; + + R_Id := + Get_Restriction_Id + (Process_Restriction_Synonyms (Expr)); + + if R_Id not in All_Boolean_Restrictions then + Error_Msg_Name_1 := Pname; + Error_Msg_N + ("invalid restriction identifier&", Get_Pragma_Arg (Arg)); + + -- Check for possible misspelling + + for J in Restriction_Id loop + declare + Rnm : constant String := Restriction_Id'Image (J); + + begin + Name_Buffer (1 .. Rnm'Length) := Rnm; + Name_Len := Rnm'Length; + Set_Casing (All_Lower_Case); + + if Is_Bad_Spelling_Of (Chars (Expr), Name_Enter) then + Set_Casing + (Identifier_Casing (Current_Source_File)); + Error_Msg_String (1 .. Rnm'Length) := + Name_Buffer (1 .. Name_Len); + Error_Msg_Strlen := Rnm'Length; + Error_Msg_N + ("\possible misspelling of ""~""", + Get_Pragma_Arg (Arg)); + exit; + end if; + end; + end loop; + + raise Pragma_Exit; + end if; + + if Implementation_Restriction (R_Id) then + Check_Restriction (No_Implementation_Restrictions, Arg); + end if; + + -- If this is a warning, then set the warning unless we already + -- have a real restriction active (we never want a warning to + -- override a real restriction). + + if Warn then + if not Restriction_Active (R_Id) then + Set_Restriction (R_Id, N); + Restriction_Warnings (R_Id) := True; + end if; + + -- If real restriction case, then set it and make sure that the + -- restriction warning flag is off, since a real restriction + -- always overrides a warning. + + else + Set_Restriction (R_Id, N); + Restriction_Warnings (R_Id) := False; + end if; + + -- A very special case that must be processed here: pragma + -- Restrictions (No_Exceptions) turns off all run-time + -- checking. This is a bit dubious in terms of the formal + -- language definition, but it is what is intended by RM + -- H.4(12). Restriction_Warnings never affects generated code + -- so this is done only in the real restriction case. + + if R_Id = No_Exceptions and then not Warn then + Scope_Suppress := (others => True); + end if; + + -- Case of No_Dependence => unit-name. Note that the parser + -- already made the necessary entry in the No_Dependence table. + + elsif Id = Name_No_Dependence then + Check_Unit_Name (Expr); + + -- All other cases of restriction identifier present + + else + R_Id := Get_Restriction_Id (Process_Restriction_Synonyms (Arg)); + Analyze_And_Resolve (Expr, Any_Integer); + + if R_Id not in All_Parameter_Restrictions then + Error_Pragma_Arg + ("invalid restriction parameter identifier", Arg); + + elsif not Is_OK_Static_Expression (Expr) then + Flag_Non_Static_Expr + ("value must be static expression!", Expr); + raise Pragma_Exit; + + elsif not Is_Integer_Type (Etype (Expr)) + or else Expr_Value (Expr) < 0 + then + Error_Pragma_Arg + ("value must be non-negative integer", Arg); + end if; + + -- Restriction pragma is active + + Val := Expr_Value (Expr); + + if not UI_Is_In_Int_Range (Val) then + Error_Pragma_Arg + ("pragma ignored, value too large?", Arg); + end if; + + -- Warning case. If the real restriction is active, then we + -- ignore the request, since warning never overrides a real + -- restriction. Otherwise we set the proper warning. Note that + -- this circuit sets the warning again if it is already set, + -- which is what we want, since the constant may have changed. + + if Warn then + if not Restriction_Active (R_Id) then + Set_Restriction + (R_Id, N, Integer (UI_To_Int (Val))); + Restriction_Warnings (R_Id) := True; + end if; + + -- Real restriction case, set restriction and make sure warning + -- flag is off since real restriction always overrides warning. + + else + Set_Restriction (R_Id, N, Integer (UI_To_Int (Val))); + Restriction_Warnings (R_Id) := False; + end if; + end if; + + Next (Arg); + end loop; + end Process_Restrictions_Or_Restriction_Warnings; + + --------------------------------- + -- Process_Suppress_Unsuppress -- + --------------------------------- + + -- Note: this procedure makes entries in the check suppress data + -- structures managed by Sem. See spec of package Sem for full + -- details on how we handle recording of check suppression. + + procedure Process_Suppress_Unsuppress (Suppress_Case : Boolean) is + C : Check_Id; + E_Id : Node_Id; + E : Entity_Id; + + In_Package_Spec : constant Boolean := + Is_Package_Or_Generic_Package (Current_Scope) + and then not In_Package_Body (Current_Scope); + + procedure Suppress_Unsuppress_Echeck (E : Entity_Id; C : Check_Id); + -- Used to suppress a single check on the given entity + + -------------------------------- + -- Suppress_Unsuppress_Echeck -- + -------------------------------- + + procedure Suppress_Unsuppress_Echeck (E : Entity_Id; C : Check_Id) is + begin + Set_Checks_May_Be_Suppressed (E); + + if In_Package_Spec then + Push_Global_Suppress_Stack_Entry + (Entity => E, + Check => C, + Suppress => Suppress_Case); + + else + Push_Local_Suppress_Stack_Entry + (Entity => E, + Check => C, + Suppress => Suppress_Case); + end if; + + -- If this is a first subtype, and the base type is distinct, + -- then also set the suppress flags on the base type. + + if Is_First_Subtype (E) + and then Etype (E) /= E + then + Suppress_Unsuppress_Echeck (Etype (E), C); + end if; + end Suppress_Unsuppress_Echeck; + + -- Start of processing for Process_Suppress_Unsuppress + + begin + -- Suppress/Unsuppress can appear as a configuration pragma, + -- or in a declarative part or a package spec (RM 11.5(5)) + + if not Is_Configuration_Pragma then + Check_Is_In_Decl_Part_Or_Package_Spec; + end if; + + Check_At_Least_N_Arguments (1); + Check_At_Most_N_Arguments (2); + Check_No_Identifier (Arg1); + Check_Arg_Is_Identifier (Arg1); + + C := Get_Check_Id (Chars (Expression (Arg1))); + + if C = No_Check_Id then + Error_Pragma_Arg + ("argument of pragma% is not valid check name", Arg1); + end if; + + if not Suppress_Case + and then (C = All_Checks or else C = Overflow_Check) + then + Opt.Overflow_Checks_Unsuppressed := True; + end if; + + if Arg_Count = 1 then + + -- Make an entry in the local scope suppress table. This is the + -- table that directly shows the current value of the scope + -- suppress check for any check id value. + + if C = All_Checks then + + -- For All_Checks, we set all specific predefined checks with + -- the exception of Elaboration_Check, which is handled + -- specially because of not wanting All_Checks to have the + -- effect of deactivating static elaboration order processing. + + for J in Scope_Suppress'Range loop + if J /= Elaboration_Check then + Scope_Suppress (J) := Suppress_Case; + end if; + end loop; + + -- If not All_Checks, and predefined check, then set appropriate + -- scope entry. Note that we will set Elaboration_Check if this + -- is explicitly specified. + + elsif C in Predefined_Check_Id then + Scope_Suppress (C) := Suppress_Case; + end if; + + -- Also make an entry in the Local_Entity_Suppress table + + Push_Local_Suppress_Stack_Entry + (Entity => Empty, + Check => C, + Suppress => Suppress_Case); + + -- Case of two arguments present, where the check is suppressed for + -- a specified entity (given as the second argument of the pragma) + + else + Check_Optional_Identifier (Arg2, Name_On); + E_Id := Expression (Arg2); + Analyze (E_Id); + + if not Is_Entity_Name (E_Id) then + Error_Pragma_Arg + ("second argument of pragma% must be entity name", Arg2); + end if; + + E := Entity (E_Id); + + if E = Any_Id then + return; + end if; + + -- Enforce RM 11.5(7) which requires that for a pragma that + -- appears within a package spec, the named entity must be + -- within the package spec. We allow the package name itself + -- to be mentioned since that makes sense, although it is not + -- strictly allowed by 11.5(7). + + if In_Package_Spec + and then E /= Current_Scope + and then Scope (E) /= Current_Scope + then + Error_Pragma_Arg + ("entity in pragma% is not in package spec (RM 11.5(7))", + Arg2); + end if; + + -- Loop through homonyms. As noted below, in the case of a package + -- spec, only homonyms within the package spec are considered. + + loop + Suppress_Unsuppress_Echeck (E, C); + + if Is_Generic_Instance (E) + and then Is_Subprogram (E) + and then Present (Alias (E)) + then + Suppress_Unsuppress_Echeck (Alias (E), C); + end if; + + -- Move to next homonym + + E := Homonym (E); + exit when No (E); + + -- If we are within a package specification, the + -- pragma only applies to homonyms in the same scope. + + exit when In_Package_Spec + and then Scope (E) /= Current_Scope; + end loop; + end if; + end Process_Suppress_Unsuppress; + + ------------------ + -- Set_Exported -- + ------------------ + + procedure Set_Exported (E : Entity_Id; Arg : Node_Id) is + begin + if Is_Imported (E) then + Error_Pragma_Arg + ("cannot export entity& that was previously imported", Arg); + + elsif Present (Address_Clause (E)) then + Error_Pragma_Arg + ("cannot export entity& that has an address clause", Arg); + end if; + + Set_Is_Exported (E); + + -- Generate a reference for entity explicitly, because the + -- identifier may be overloaded and name resolution will not + -- generate one. + + Generate_Reference (E, Arg); + + -- Deal with exporting non-library level entity + + if not Is_Library_Level_Entity (E) then + + -- Not allowed at all for subprograms + + if Is_Subprogram (E) then + Error_Pragma_Arg ("local subprogram& cannot be exported", Arg); + + -- Otherwise set public and statically allocated + + else + Set_Is_Public (E); + Set_Is_Statically_Allocated (E); + + -- Warn if the corresponding W flag is set and the pragma + -- comes from source. The latter may not be true e.g. on + -- VMS where we expand export pragmas for exception codes + -- associated with imported or exported exceptions. We do + -- not want to generate a warning for something that the + -- user did not write. + + if Warn_On_Export_Import + and then Comes_From_Source (Arg) + then + Error_Msg_NE + ("?& has been made static as a result of Export", Arg, E); + Error_Msg_N + ("\this usage is non-standard and non-portable", Arg); + end if; + end if; + end if; + + if Warn_On_Export_Import and then Is_Type (E) then + Error_Msg_NE + ("exporting a type has no effect?", Arg, E); + end if; + + if Warn_On_Export_Import and Inside_A_Generic then + Error_Msg_NE + ("all instances of& will have the same external name?", Arg, E); + end if; + end Set_Exported; + + ---------------------------------------------- + -- Set_Extended_Import_Export_External_Name -- + ---------------------------------------------- + + procedure Set_Extended_Import_Export_External_Name + (Internal_Ent : Entity_Id; + Arg_External : Node_Id) + is + Old_Name : constant Node_Id := Interface_Name (Internal_Ent); + New_Name : Node_Id; + + begin + if No (Arg_External) then + return; + end if; + + Check_Arg_Is_External_Name (Arg_External); + + if Nkind (Arg_External) = N_String_Literal then + if String_Length (Strval (Arg_External)) = 0 then + return; + else + New_Name := Adjust_External_Name_Case (Arg_External); + end if; + + elsif Nkind (Arg_External) = N_Identifier then + New_Name := Get_Default_External_Name (Arg_External); + + -- Check_Arg_Is_External_Name should let through only + -- identifiers and string literals or static string + -- expressions (which are folded to string literals). + + else + raise Program_Error; + end if; + + -- If we already have an external name set (by a prior normal + -- Import or Export pragma), then the external names must match + + if Present (Interface_Name (Internal_Ent)) then + Check_Matching_Internal_Names : declare + S1 : constant String_Id := Strval (Old_Name); + S2 : constant String_Id := Strval (New_Name); + + procedure Mismatch; + -- Called if names do not match + + -------------- + -- Mismatch -- + -------------- + + procedure Mismatch is + begin + Error_Msg_Sloc := Sloc (Old_Name); + Error_Pragma_Arg + ("external name does not match that given #", + Arg_External); + end Mismatch; + + -- Start of processing for Check_Matching_Internal_Names + + begin + if String_Length (S1) /= String_Length (S2) then + Mismatch; + + else + for J in 1 .. String_Length (S1) loop + if Get_String_Char (S1, J) /= Get_String_Char (S2, J) then + Mismatch; + end if; + end loop; + end if; + end Check_Matching_Internal_Names; + + -- Otherwise set the given name + + else + Set_Encoded_Interface_Name (Internal_Ent, New_Name); + Check_Duplicated_Export_Name (New_Name); + end if; + end Set_Extended_Import_Export_External_Name; + + ------------------ + -- Set_Imported -- + ------------------ + + procedure Set_Imported (E : Entity_Id) is + begin + -- Error message if already imported or exported + + if Is_Exported (E) or else Is_Imported (E) then + if Is_Exported (E) then + Error_Msg_NE ("entity& was previously exported", N, E); + else + Error_Msg_NE ("entity& was previously imported", N, E); + end if; + + Error_Msg_Name_1 := Pname; + Error_Msg_N + ("\(pragma% applies to all previous entities)", N); + + Error_Msg_Sloc := Sloc (E); + Error_Msg_NE ("\import not allowed for& declared#", N, E); + + -- Here if not previously imported or exported, OK to import + + else + Set_Is_Imported (E); + + -- If the entity is an object that is not at the library + -- level, then it is statically allocated. We do not worry + -- about objects with address clauses in this context since + -- they are not really imported in the linker sense. + + if Is_Object (E) + and then not Is_Library_Level_Entity (E) + and then No (Address_Clause (E)) + then + Set_Is_Statically_Allocated (E); + end if; + end if; + end Set_Imported; + + ------------------------- + -- Set_Mechanism_Value -- + ------------------------- + + -- Note: the mechanism name has not been analyzed (and cannot indeed + -- be analyzed, since it is semantic nonsense), so we get it in the + -- exact form created by the parser. + + procedure Set_Mechanism_Value (Ent : Entity_Id; Mech_Name : Node_Id) is + Class : Node_Id; + Param : Node_Id; + Mech_Name_Id : Name_Id; + + procedure Bad_Class; + -- Signal bad descriptor class name + + procedure Bad_Mechanism; + -- Signal bad mechanism name + + --------------- + -- Bad_Class -- + --------------- + + procedure Bad_Class is + begin + Error_Pragma_Arg ("unrecognized descriptor class name", Class); + end Bad_Class; + + ------------------------- + -- Bad_Mechanism_Value -- + ------------------------- + + procedure Bad_Mechanism is + begin + Error_Pragma_Arg ("unrecognized mechanism name", Mech_Name); + end Bad_Mechanism; + + -- Start of processing for Set_Mechanism_Value + + begin + if Mechanism (Ent) /= Default_Mechanism then + Error_Msg_NE + ("mechanism for & has already been set", Mech_Name, Ent); + end if; + + -- MECHANISM_NAME ::= value | reference | descriptor | + -- short_descriptor + + if Nkind (Mech_Name) = N_Identifier then + if Chars (Mech_Name) = Name_Value then + Set_Mechanism (Ent, By_Copy); + return; + + elsif Chars (Mech_Name) = Name_Reference then + Set_Mechanism (Ent, By_Reference); + return; + + elsif Chars (Mech_Name) = Name_Descriptor then + Check_VMS (Mech_Name); + Set_Mechanism (Ent, By_Descriptor); + return; + + elsif Chars (Mech_Name) = Name_Short_Descriptor then + Check_VMS (Mech_Name); + Set_Mechanism (Ent, By_Short_Descriptor); + return; + + elsif Chars (Mech_Name) = Name_Copy then + Error_Pragma_Arg + ("bad mechanism name, Value assumed", Mech_Name); + + else + Bad_Mechanism; + end if; + + -- MECHANISM_NAME ::= descriptor (CLASS_NAME) | + -- short_descriptor (CLASS_NAME) + -- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca + + -- Note: this form is parsed as an indexed component + + elsif Nkind (Mech_Name) = N_Indexed_Component then + + Class := First (Expressions (Mech_Name)); + + if Nkind (Prefix (Mech_Name)) /= N_Identifier + or else not (Chars (Prefix (Mech_Name)) = Name_Descriptor or else + Chars (Prefix (Mech_Name)) = Name_Short_Descriptor) + or else Present (Next (Class)) + then + Bad_Mechanism; + else + Mech_Name_Id := Chars (Prefix (Mech_Name)); + end if; + + -- MECHANISM_NAME ::= descriptor (Class => CLASS_NAME) | + -- short_descriptor (Class => CLASS_NAME) + -- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca + + -- Note: this form is parsed as a function call + + elsif Nkind (Mech_Name) = N_Function_Call then + + Param := First (Parameter_Associations (Mech_Name)); + + if Nkind (Name (Mech_Name)) /= N_Identifier + or else not (Chars (Name (Mech_Name)) = Name_Descriptor or else + Chars (Name (Mech_Name)) = Name_Short_Descriptor) + or else Present (Next (Param)) + or else No (Selector_Name (Param)) + or else Chars (Selector_Name (Param)) /= Name_Class + then + Bad_Mechanism; + else + Class := Explicit_Actual_Parameter (Param); + Mech_Name_Id := Chars (Name (Mech_Name)); + end if; + + else + Bad_Mechanism; + end if; + + -- Fall through here with Class set to descriptor class name + + Check_VMS (Mech_Name); + + if Nkind (Class) /= N_Identifier then + Bad_Class; + + elsif Mech_Name_Id = Name_Descriptor + and then Chars (Class) = Name_UBS + then + Set_Mechanism (Ent, By_Descriptor_UBS); + + elsif Mech_Name_Id = Name_Descriptor + and then Chars (Class) = Name_UBSB + then + Set_Mechanism (Ent, By_Descriptor_UBSB); + + elsif Mech_Name_Id = Name_Descriptor + and then Chars (Class) = Name_UBA + then + Set_Mechanism (Ent, By_Descriptor_UBA); + + elsif Mech_Name_Id = Name_Descriptor + and then Chars (Class) = Name_S + then + Set_Mechanism (Ent, By_Descriptor_S); + + elsif Mech_Name_Id = Name_Descriptor + and then Chars (Class) = Name_SB + then + Set_Mechanism (Ent, By_Descriptor_SB); + + elsif Mech_Name_Id = Name_Descriptor + and then Chars (Class) = Name_A + then + Set_Mechanism (Ent, By_Descriptor_A); + + elsif Mech_Name_Id = Name_Descriptor + and then Chars (Class) = Name_NCA + then + Set_Mechanism (Ent, By_Descriptor_NCA); + + elsif Mech_Name_Id = Name_Short_Descriptor + and then Chars (Class) = Name_UBS + then + Set_Mechanism (Ent, By_Short_Descriptor_UBS); + + elsif Mech_Name_Id = Name_Short_Descriptor + and then Chars (Class) = Name_UBSB + then + Set_Mechanism (Ent, By_Short_Descriptor_UBSB); + + elsif Mech_Name_Id = Name_Short_Descriptor + and then Chars (Class) = Name_UBA + then + Set_Mechanism (Ent, By_Short_Descriptor_UBA); + + elsif Mech_Name_Id = Name_Short_Descriptor + and then Chars (Class) = Name_S + then + Set_Mechanism (Ent, By_Short_Descriptor_S); + + elsif Mech_Name_Id = Name_Short_Descriptor + and then Chars (Class) = Name_SB + then + Set_Mechanism (Ent, By_Short_Descriptor_SB); + + elsif Mech_Name_Id = Name_Short_Descriptor + and then Chars (Class) = Name_A + then + Set_Mechanism (Ent, By_Short_Descriptor_A); + + elsif Mech_Name_Id = Name_Short_Descriptor + and then Chars (Class) = Name_NCA + then + Set_Mechanism (Ent, By_Short_Descriptor_NCA); + + else + Bad_Class; + end if; + end Set_Mechanism_Value; + + --------------------------- + -- Set_Ravenscar_Profile -- + --------------------------- + + -- The tasks to be done here are + + -- Set required policies + + -- pragma Task_Dispatching_Policy (FIFO_Within_Priorities) + -- pragma Locking_Policy (Ceiling_Locking) + + -- Set Detect_Blocking mode + + -- Set required restrictions (see System.Rident for detailed list) + + procedure Set_Ravenscar_Profile (N : Node_Id) is + begin + -- pragma Task_Dispatching_Policy (FIFO_Within_Priorities) + + if Task_Dispatching_Policy /= ' ' + and then Task_Dispatching_Policy /= 'F' + then + Error_Msg_Sloc := Task_Dispatching_Policy_Sloc; + Error_Pragma ("Profile (Ravenscar) incompatible with policy#"); + + -- Set the FIFO_Within_Priorities policy, but always preserve + -- System_Location since we like the error message with the run time + -- name. + + else + Task_Dispatching_Policy := 'F'; + + if Task_Dispatching_Policy_Sloc /= System_Location then + Task_Dispatching_Policy_Sloc := Loc; + end if; + end if; + + -- pragma Locking_Policy (Ceiling_Locking) + + if Locking_Policy /= ' ' + and then Locking_Policy /= 'C' + then + Error_Msg_Sloc := Locking_Policy_Sloc; + Error_Pragma ("Profile (Ravenscar) incompatible with policy#"); + + -- Set the Ceiling_Locking policy, but preserve System_Location since + -- we like the error message with the run time name. + + else + Locking_Policy := 'C'; + + if Locking_Policy_Sloc /= System_Location then + Locking_Policy_Sloc := Loc; + end if; + end if; + + -- pragma Detect_Blocking + + Detect_Blocking := True; + + -- Set the corresponding restrictions + + Set_Profile_Restrictions + (Ravenscar, N, Warn => Treat_Restrictions_As_Warnings); + end Set_Ravenscar_Profile; + + -- Start of processing for Analyze_Pragma + + begin + -- Deal with unrecognized pragma + + if not Is_Pragma_Name (Pname) then + if Warn_On_Unrecognized_Pragma then + Error_Msg_Name_1 := Pname; + Error_Msg_N ("?unrecognized pragma%!", Pragma_Identifier (N)); + + for PN in First_Pragma_Name .. Last_Pragma_Name loop + if Is_Bad_Spelling_Of (Pname, PN) then + Error_Msg_Name_1 := PN; + Error_Msg_N + ("\?possible misspelling of %!", Pragma_Identifier (N)); + exit; + end if; + end loop; + end if; + + return; + end if; + + -- Here to start processing for recognized pragma + + Prag_Id := Get_Pragma_Id (Pname); + + -- Preset arguments + + Arg1 := Empty; + Arg2 := Empty; + Arg3 := Empty; + Arg4 := Empty; + + if Present (Pragma_Argument_Associations (N)) then + Arg1 := First (Pragma_Argument_Associations (N)); + + if Present (Arg1) then + Arg2 := Next (Arg1); + + if Present (Arg2) then + Arg3 := Next (Arg2); + + if Present (Arg3) then + Arg4 := Next (Arg3); + end if; + end if; + end if; + end if; + + -- Count number of arguments + + declare + Arg_Node : Node_Id; + begin + Arg_Count := 0; + Arg_Node := Arg1; + while Present (Arg_Node) loop + Arg_Count := Arg_Count + 1; + Next (Arg_Node); + end loop; + end; + + -- An enumeration type defines the pragmas that are supported by the + -- implementation. Get_Pragma_Id (in package Prag) transforms a name + -- into the corresponding enumeration value for the following case. + + case Prag_Id is + + ----------------- + -- Abort_Defer -- + ----------------- + + -- pragma Abort_Defer; + + when Pragma_Abort_Defer => + GNAT_Pragma; + Check_Arg_Count (0); + + -- The only required semantic processing is to check the + -- placement. This pragma must appear at the start of the + -- statement sequence of a handled sequence of statements. + + if Nkind (Parent (N)) /= N_Handled_Sequence_Of_Statements + or else N /= First (Statements (Parent (N))) + then + Pragma_Misplaced; + end if; + + ------------ + -- Ada_83 -- + ------------ + + -- pragma Ada_83; + + -- Note: this pragma also has some specific processing in Par.Prag + -- because we want to set the Ada version mode during parsing. + + when Pragma_Ada_83 => + GNAT_Pragma; + Check_Arg_Count (0); + + -- We really should check unconditionally for proper configuration + -- pragma placement, since we really don't want mixed Ada modes + -- within a single unit, and the GNAT reference manual has always + -- said this was a configuration pragma, but we did not check and + -- are hesitant to add the check now. + + -- However, we really cannot tolerate mixing Ada 2005 with Ada 83 + -- or Ada 95, so we must check if we are in Ada 2005 mode. + + if Ada_Version >= Ada_05 then + Check_Valid_Configuration_Pragma; + end if; + + -- Now set Ada 83 mode + + Ada_Version := Ada_83; + Ada_Version_Explicit := Ada_Version; + + ------------ + -- Ada_95 -- + ------------ + + -- pragma Ada_95; + + -- Note: this pragma also has some specific processing in Par.Prag + -- because we want to set the Ada 83 version mode during parsing. + + when Pragma_Ada_95 => + GNAT_Pragma; + Check_Arg_Count (0); + + -- We really should check unconditionally for proper configuration + -- pragma placement, since we really don't want mixed Ada modes + -- within a single unit, and the GNAT reference manual has always + -- said this was a configuration pragma, but we did not check and + -- are hesitant to add the check now. + + -- However, we really cannot tolerate mixing Ada 2005 with Ada 83 + -- or Ada 95, so we must check if we are in Ada 2005 mode. + + if Ada_Version >= Ada_05 then + Check_Valid_Configuration_Pragma; + end if; + + -- Now set Ada 95 mode + + Ada_Version := Ada_95; + Ada_Version_Explicit := Ada_Version; + + --------------------- + -- Ada_05/Ada_2005 -- + --------------------- + + -- pragma Ada_05; + -- pragma Ada_05 (LOCAL_NAME); + + -- pragma Ada_2005; + -- pragma Ada_2005 (LOCAL_NAME): + + -- Note: these pragma also have some specific processing in Par.Prag + -- because we want to set the Ada 2005 version mode during parsing. + + when Pragma_Ada_05 | Pragma_Ada_2005 => declare + E_Id : Node_Id; + + begin + GNAT_Pragma; + + if Arg_Count = 1 then + Check_Arg_Is_Local_Name (Arg1); + E_Id := Expression (Arg1); + + if Etype (E_Id) = Any_Type then + return; + end if; + + Set_Is_Ada_2005_Only (Entity (E_Id)); + + else + Check_Arg_Count (0); + + -- For Ada_2005 we unconditionally enforce the documented + -- configuration pragma placement, since we do not want to + -- tolerate mixed modes in a unit involving Ada 2005. That + -- would cause real difficulties for those cases where there + -- are incompatibilities between Ada 95 and Ada 2005. + + Check_Valid_Configuration_Pragma; + + -- Now set Ada 2005 mode + + Ada_Version := Ada_05; + Ada_Version_Explicit := Ada_05; + end if; + end; + + ---------------------- + -- All_Calls_Remote -- + ---------------------- + + -- pragma All_Calls_Remote [(library_package_NAME)]; + + when Pragma_All_Calls_Remote => All_Calls_Remote : declare + Lib_Entity : Entity_Id; + + begin + Check_Ada_83_Warning; + Check_Valid_Library_Unit_Pragma; + + if Nkind (N) = N_Null_Statement then + return; + end if; + + Lib_Entity := Find_Lib_Unit_Name; + + -- This pragma should only apply to a RCI unit (RM E.2.3(23)) + + if Present (Lib_Entity) + and then not Debug_Flag_U + then + if not Is_Remote_Call_Interface (Lib_Entity) then + Error_Pragma ("pragma% only apply to rci unit"); + + -- Set flag for entity of the library unit + + else + Set_Has_All_Calls_Remote (Lib_Entity); + end if; + + end if; + end All_Calls_Remote; + + -------------- + -- Annotate -- + -------------- + + -- pragma Annotate (IDENTIFIER {, ARG}); + -- ARG ::= NAME | EXPRESSION + + when Pragma_Annotate => Annotate : begin + GNAT_Pragma; + Check_At_Least_N_Arguments (1); + Check_Arg_Is_Identifier (Arg1); + + declare + Arg : Node_Id; + Exp : Node_Id; + + begin + Arg := Arg2; + while Present (Arg) loop + Exp := Expression (Arg); + Analyze (Exp); + + if Is_Entity_Name (Exp) then + null; + + elsif Nkind (Exp) = N_String_Literal then + Resolve (Exp, Standard_String); + + elsif Is_Overloaded (Exp) then + Error_Pragma_Arg ("ambiguous argument for pragma%", Exp); + + else + Resolve (Exp); + end if; + + Next (Arg); + end loop; + end; + end Annotate; + + ------------ + -- Assert -- + ------------ + + -- pragma Assert ([Check =>] Boolean_EXPRESSION + -- [, [Message =>] Static_String_EXPRESSION]); + + when Pragma_Assert => Assert : declare + Expr : Node_Id; + Newa : List_Id; + + begin + Ada_2005_Pragma; + Check_At_Least_N_Arguments (1); + Check_At_Most_N_Arguments (2); + Check_Arg_Order ((Name_Check, Name_Message)); + Check_Optional_Identifier (Arg1, Name_Check); + + -- We treat pragma Assert as equivalent to: + + -- pragma Check (Assertion, condition [, msg]); + + -- So rewrite pragma in this manner, and analyze the result + + Expr := Get_Pragma_Arg (Arg1); + Newa := New_List ( + Make_Pragma_Argument_Association (Loc, + Expression => + Make_Identifier (Loc, + Chars => Name_Assertion)), + + Make_Pragma_Argument_Association (Sloc (Expr), + Expression => Expr)); + + if Arg_Count > 1 then + Check_Optional_Identifier (Arg2, Name_Message); + Analyze_And_Resolve (Get_Pragma_Arg (Arg2), Standard_String); + Append_To (Newa, Relocate_Node (Arg2)); + end if; + + Rewrite (N, + Make_Pragma (Loc, + Chars => Name_Check, + Pragma_Argument_Associations => Newa)); + Analyze (N); + end Assert; + + ---------------------- + -- Assertion_Policy -- + ---------------------- + + -- pragma Assertion_Policy (Check | Ignore) + + when Pragma_Assertion_Policy => Assertion_Policy : declare + Policy : Node_Id; + + begin + Ada_2005_Pragma; + Check_Valid_Configuration_Pragma; + Check_Arg_Count (1); + Check_No_Identifiers; + Check_Arg_Is_One_Of (Arg1, Name_Check, Name_Ignore); + + -- We treat pragma Assertion_Policy as equivalent to: + + -- pragma Check_Policy (Assertion, policy) + + -- So rewrite the pragma in that manner and link on to the chain + -- of Check_Policy pragmas, marking the pragma as analyzed. + + Policy := Get_Pragma_Arg (Arg1); + + Rewrite (N, + Make_Pragma (Loc, + Chars => Name_Check_Policy, + + Pragma_Argument_Associations => New_List ( + Make_Pragma_Argument_Association (Loc, + Expression => + Make_Identifier (Loc, + Chars => Name_Assertion)), + + Make_Pragma_Argument_Association (Loc, + Expression => + Make_Identifier (Sloc (Policy), + Chars => Chars (Policy)))))); + + Set_Analyzed (N); + Set_Next_Pragma (N, Opt.Check_Policy_List); + Opt.Check_Policy_List := N; + end Assertion_Policy; + + ------------------------------ + -- Assume_No_Invalid_Values -- + ------------------------------ + + -- pragma Assume_No_Invalid_Values (On | Off); + + when Pragma_Assume_No_Invalid_Values => + GNAT_Pragma; + Check_Valid_Configuration_Pragma; + Check_Arg_Count (1); + Check_No_Identifiers; + Check_Arg_Is_One_Of (Arg1, Name_On, Name_Off); + + if Chars (Expression (Arg1)) = Name_On then + Assume_No_Invalid_Values := True; + else + Assume_No_Invalid_Values := False; + end if; + + --------------- + -- AST_Entry -- + --------------- + + -- pragma AST_Entry (entry_IDENTIFIER); + + when Pragma_AST_Entry => AST_Entry : declare + Ent : Node_Id; + + begin + GNAT_Pragma; + Check_VMS (N); + Check_Arg_Count (1); + Check_No_Identifiers; + Check_Arg_Is_Local_Name (Arg1); + Ent := Entity (Expression (Arg1)); + + -- Note: the implementation of the AST_Entry pragma could handle + -- the entry family case fine, but for now we are consistent with + -- the DEC rules, and do not allow the pragma, which of course + -- has the effect of also forbidding the attribute. + + if Ekind (Ent) /= E_Entry then + Error_Pragma_Arg + ("pragma% argument must be simple entry name", Arg1); + + elsif Is_AST_Entry (Ent) then + Error_Pragma_Arg + ("duplicate % pragma for entry", Arg1); + + elsif Has_Homonym (Ent) then + Error_Pragma_Arg + ("pragma% argument cannot specify overloaded entry", Arg1); + + else + declare + FF : constant Entity_Id := First_Formal (Ent); + + begin + if Present (FF) then + if Present (Next_Formal (FF)) then + Error_Pragma_Arg + ("entry for pragma% can have only one argument", + Arg1); + + elsif Parameter_Mode (FF) /= E_In_Parameter then + Error_Pragma_Arg + ("entry parameter for pragma% must have mode IN", + Arg1); + end if; + end if; + end; + + Set_Is_AST_Entry (Ent); + end if; + end AST_Entry; + + ------------------ + -- Asynchronous -- + ------------------ + + -- pragma Asynchronous (LOCAL_NAME); + + when Pragma_Asynchronous => Asynchronous : declare + Nm : Entity_Id; + C_Ent : Entity_Id; + L : List_Id; + S : Node_Id; + N : Node_Id; + Formal : Entity_Id; + + procedure Process_Async_Pragma; + -- Common processing for procedure and access-to-procedure case + + -------------------------- + -- Process_Async_Pragma -- + -------------------------- + + procedure Process_Async_Pragma is + begin + if No (L) then + Set_Is_Asynchronous (Nm); + return; + end if; + + -- The formals should be of mode IN (RM E.4.1(6)) + + S := First (L); + while Present (S) loop + Formal := Defining_Identifier (S); + + if Nkind (Formal) = N_Defining_Identifier + and then Ekind (Formal) /= E_In_Parameter + then + Error_Pragma_Arg + ("pragma% procedure can only have IN parameter", + Arg1); + end if; + + Next (S); + end loop; + + Set_Is_Asynchronous (Nm); + end Process_Async_Pragma; + + -- Start of processing for pragma Asynchronous + + begin + Check_Ada_83_Warning; + Check_No_Identifiers; + Check_Arg_Count (1); + Check_Arg_Is_Local_Name (Arg1); + + if Debug_Flag_U then + return; + end if; + + C_Ent := Cunit_Entity (Current_Sem_Unit); + Analyze (Expression (Arg1)); + Nm := Entity (Expression (Arg1)); + + if not Is_Remote_Call_Interface (C_Ent) + and then not Is_Remote_Types (C_Ent) + then + -- This pragma should only appear in an RCI or Remote Types + -- unit (RM E.4.1(4)) + + Error_Pragma + ("pragma% not in Remote_Call_Interface or " & + "Remote_Types unit"); + end if; + + if Ekind (Nm) = E_Procedure + and then Nkind (Parent (Nm)) = N_Procedure_Specification + then + if not Is_Remote_Call_Interface (Nm) then + Error_Pragma_Arg + ("pragma% cannot be applied on non-remote procedure", + Arg1); + end if; + + L := Parameter_Specifications (Parent (Nm)); + Process_Async_Pragma; + return; + + elsif Ekind (Nm) = E_Function then + Error_Pragma_Arg + ("pragma% cannot be applied to function", Arg1); + + elsif Is_Remote_Access_To_Subprogram_Type (Nm) then + + if Is_Record_Type (Nm) then + -- A record type that is the Equivalent_Type for + -- a remote access-to-subprogram type. + + N := Declaration_Node (Corresponding_Remote_Type (Nm)); + + else + -- A non-expanded RAS type (case where distribution is + -- not enabled). + + N := Declaration_Node (Nm); + end if; + + if Nkind (N) = N_Full_Type_Declaration + and then Nkind (Type_Definition (N)) = + N_Access_Procedure_Definition + then + L := Parameter_Specifications (Type_Definition (N)); + Process_Async_Pragma; + + if Is_Asynchronous (Nm) + and then Expander_Active + and then Get_PCS_Name /= Name_No_DSA + then + RACW_Type_Is_Asynchronous (Underlying_RACW_Type (Nm)); + end if; + + else + Error_Pragma_Arg + ("pragma% cannot reference access-to-function type", + Arg1); + end if; + + -- Only other possibility is Access-to-class-wide type + + elsif Is_Access_Type (Nm) + and then Is_Class_Wide_Type (Designated_Type (Nm)) + then + Check_First_Subtype (Arg1); + Set_Is_Asynchronous (Nm); + if Expander_Active then + RACW_Type_Is_Asynchronous (Nm); + end if; + + else + Error_Pragma_Arg ("inappropriate argument for pragma%", Arg1); + end if; + end Asynchronous; + + ------------ + -- Atomic -- + ------------ + + -- pragma Atomic (LOCAL_NAME); + + when Pragma_Atomic => + Process_Atomic_Shared_Volatile; + + ----------------------- + -- Atomic_Components -- + ----------------------- + + -- pragma Atomic_Components (array_LOCAL_NAME); + + -- This processing is shared by Volatile_Components + + when Pragma_Atomic_Components | + Pragma_Volatile_Components => + + Atomic_Components : declare + E_Id : Node_Id; + E : Entity_Id; + D : Node_Id; + K : Node_Kind; + + begin + Check_Ada_83_Warning; + Check_No_Identifiers; + Check_Arg_Count (1); + Check_Arg_Is_Local_Name (Arg1); + E_Id := Expression (Arg1); + + if Etype (E_Id) = Any_Type then + return; + end if; + + E := Entity (E_Id); + + if Rep_Item_Too_Early (E, N) + or else + Rep_Item_Too_Late (E, N) + then + return; + end if; + + D := Declaration_Node (E); + K := Nkind (D); + + if (K = N_Full_Type_Declaration and then Is_Array_Type (E)) + or else + ((Ekind (E) = E_Constant or else Ekind (E) = E_Variable) + and then Nkind (D) = N_Object_Declaration + and then Nkind (Object_Definition (D)) = + N_Constrained_Array_Definition) + then + -- The flag is set on the object, or on the base type + + if Nkind (D) /= N_Object_Declaration then + E := Base_Type (E); + end if; + + Set_Has_Volatile_Components (E); + + if Prag_Id = Pragma_Atomic_Components then + Set_Has_Atomic_Components (E); + + if Is_Packed (E) then + Set_Is_Packed (E, False); + + Error_Pragma_Arg + ("?Pack canceled, cannot pack atomic components", + Arg1); + end if; + end if; + + else + Error_Pragma_Arg ("inappropriate entity for pragma%", Arg1); + end if; + end Atomic_Components; + + -------------------- + -- Attach_Handler -- + -------------------- + + -- pragma Attach_Handler (handler_NAME, EXPRESSION); + + when Pragma_Attach_Handler => + Check_Ada_83_Warning; + Check_No_Identifiers; + Check_Arg_Count (2); + + if No_Run_Time_Mode then + Error_Msg_CRT ("Attach_Handler pragma", N); + else + Check_Interrupt_Or_Attach_Handler; + + -- The expression that designates the attribute may + -- depend on a discriminant, and is therefore a per- + -- object expression, to be expanded in the init proc. + -- If expansion is enabled, perform semantic checks + -- on a copy only. + + if Expander_Active then + declare + Temp : constant Node_Id := + New_Copy_Tree (Expression (Arg2)); + begin + Set_Parent (Temp, N); + Preanalyze_And_Resolve (Temp, RTE (RE_Interrupt_ID)); + end; + + else + Analyze (Expression (Arg2)); + Resolve (Expression (Arg2), RTE (RE_Interrupt_ID)); + end if; + + Process_Interrupt_Or_Attach_Handler; + end if; + + -------------------- + -- C_Pass_By_Copy -- + -------------------- + + -- pragma C_Pass_By_Copy ([Max_Size =>] static_integer_EXPRESSION); + + when Pragma_C_Pass_By_Copy => C_Pass_By_Copy : declare + Arg : Node_Id; + Val : Uint; + + begin + GNAT_Pragma; + Check_Valid_Configuration_Pragma; + Check_Arg_Count (1); + Check_Optional_Identifier (Arg1, "max_size"); + + Arg := Expression (Arg1); + Check_Arg_Is_Static_Expression (Arg, Any_Integer); + + Val := Expr_Value (Arg); + + if Val <= 0 then + Error_Pragma_Arg + ("maximum size for pragma% must be positive", Arg1); + + elsif UI_Is_In_Int_Range (Val) then + Default_C_Record_Mechanism := UI_To_Int (Val); + + -- If a giant value is given, Int'Last will do well enough. + -- If sometime someone complains that a record larger than + -- two gigabytes is not copied, we will worry about it then! + + else + Default_C_Record_Mechanism := Mechanism_Type'Last; + end if; + end C_Pass_By_Copy; + + ----------- + -- Check -- + ----------- + + -- pragma Check ([Name =>] Identifier, + -- [Check =>] Boolean_Expression + -- [,[Message =>] String_Expression]); + + when Pragma_Check => Check : declare + Expr : Node_Id; + Eloc : Source_Ptr; + + Check_On : Boolean; + -- Set True if category of assertions referenced by Name enabled + + begin + GNAT_Pragma; + Check_At_Least_N_Arguments (2); + Check_At_Most_N_Arguments (3); + Check_Optional_Identifier (Arg1, Name_Name); + Check_Optional_Identifier (Arg2, Name_Check); + + if Arg_Count = 3 then + Check_Optional_Identifier (Arg3, Name_Message); + Analyze_And_Resolve (Get_Pragma_Arg (Arg3), Standard_String); + end if; + + Check_Arg_Is_Identifier (Arg1); + Check_On := Check_Enabled (Chars (Get_Pragma_Arg (Arg1))); + + -- If expansion is active and the check is not enabled then we + -- rewrite the Check as: + + -- if False and then condition then + -- null; + -- end if; + + -- The reason we do this rewriting during semantic analysis rather + -- than as part of normal expansion is that we cannot analyze and + -- expand the code for the boolean expression directly, or it may + -- cause insertion of actions that would escape the attempt to + -- suppress the check code. + + -- Note that the Sloc for the if statement corresponds to the + -- argument condition, not the pragma itself. The reason for this + -- is that we may generate a warning if the condition is False at + -- compile time, and we do not want to delete this warning when we + -- delete the if statement. + + Expr := Expression (Arg2); + + if Expander_Active and then not Check_On then + Eloc := Sloc (Expr); + + Rewrite (N, + Make_If_Statement (Eloc, + Condition => + Make_And_Then (Eloc, + Left_Opnd => New_Occurrence_Of (Standard_False, Eloc), + Right_Opnd => Expr), + Then_Statements => New_List ( + Make_Null_Statement (Eloc)))); + + Analyze (N); + + -- Check is active + + else + Analyze_And_Resolve (Expr, Any_Boolean); + end if; + + -- If assertion is of the form (X'First = literal), where X is + -- a formal, then set Low_Bound_Known flag on this formal. + + if Nkind (Expr) = N_Op_Eq then + declare + Right : constant Node_Id := Right_Opnd (Expr); + Left : constant Node_Id := Left_Opnd (Expr); + begin + if Nkind (Left) = N_Attribute_Reference + and then Attribute_Name (Left) = Name_First + and then Is_Entity_Name (Prefix (Left)) + and then Is_Formal (Entity (Prefix (Left))) + and then Nkind (Right) = N_Integer_Literal + then + Set_Low_Bound_Known (Entity (Prefix (Left))); + end if; + end; + end if; + end Check; + + ---------------- + -- Check_Name -- + ---------------- + + -- pragma Check_Name (check_IDENTIFIER); + + when Pragma_Check_Name => + Check_No_Identifiers; + GNAT_Pragma; + Check_Valid_Configuration_Pragma; + Check_Arg_Count (1); + Check_Arg_Is_Identifier (Arg1); + + declare + Nam : constant Name_Id := Chars (Expression (Arg1)); + + begin + for J in Check_Names.First .. Check_Names.Last loop + if Check_Names.Table (J) = Nam then + return; + end if; + end loop; + + Check_Names.Append (Nam); + end; + + ------------------ + -- Check_Policy -- + ------------------ + + -- pragma Check_Policy ([Name =>] IDENTIFIER, + -- POLICY_IDENTIFIER; + + -- POLICY_IDENTIFIER ::= ON | OFF | CHECK | IGNORE + + -- Note: this is a configuration pragma, but it is allowed to + -- appear anywhere else. + + when Pragma_Check_Policy => + GNAT_Pragma; + Check_Arg_Count (2); + Check_No_Identifier (Arg2); + Check_Optional_Identifier (Arg1, Name_Name); + Check_Arg_Is_One_Of + (Arg2, Name_On, Name_Off, Name_Check, Name_Ignore); + + -- A Check_Policy pragma can appear either as a configuration + -- pragma, or in a declarative part or a package spec (see RM + -- 11.5(5) for rules for Suppress/Unsuppress which are also + -- followed for Check_Policy). + + if not Is_Configuration_Pragma then + Check_Is_In_Decl_Part_Or_Package_Spec; + end if; + + Set_Next_Pragma (N, Opt.Check_Policy_List); + Opt.Check_Policy_List := N; + + --------------------- + -- CIL_Constructor -- + --------------------- + + -- pragma CIL_Constructor ([Entity =>] LOCAL_NAME); + + -- Processing for this pragma is shared with Java_Constructor + + ------------- + -- Comment -- + ------------- + + -- pragma Comment (static_string_EXPRESSION) + + -- Processing for pragma Comment shares the circuitry for pragma + -- Ident. The only differences are that Ident enforces a limit of 31 + -- characters on its argument, and also enforces limitations on + -- placement for DEC compatibility. Pragma Comment shares neither of + -- these restrictions. + + ------------------- + -- Common_Object -- + ------------------- + + -- pragma Common_Object ( + -- [Internal =>] LOCAL_NAME + -- [, [External =>] EXTERNAL_SYMBOL] + -- [, [Size =>] EXTERNAL_SYMBOL]); + + -- Processing for this pragma is shared with Psect_Object + + ------------------------ + -- Compile_Time_Error -- + ------------------------ + + -- pragma Compile_Time_Error + -- (boolean_EXPRESSION, static_string_EXPRESSION); + + when Pragma_Compile_Time_Error => + GNAT_Pragma; + Process_Compile_Time_Warning_Or_Error; + + -------------------------- + -- Compile_Time_Warning -- + -------------------------- + + -- pragma Compile_Time_Warning + -- (boolean_EXPRESSION, static_string_EXPRESSION); + + when Pragma_Compile_Time_Warning => + GNAT_Pragma; + Process_Compile_Time_Warning_Or_Error; + + ------------------- + -- Compiler_Unit -- + ------------------- + + when Pragma_Compiler_Unit => + GNAT_Pragma; + Check_Arg_Count (0); + Set_Is_Compiler_Unit (Get_Source_Unit (N)); + + ----------------------------- + -- Complete_Representation -- + ----------------------------- + + -- pragma Complete_Representation; + + when Pragma_Complete_Representation => + GNAT_Pragma; + Check_Arg_Count (0); + + if Nkind (Parent (N)) /= N_Record_Representation_Clause then + Error_Pragma + ("pragma & must appear within record representation clause"); + end if; + + ---------------------------- + -- Complex_Representation -- + ---------------------------- + + -- pragma Complex_Representation ([Entity =>] LOCAL_NAME); + + when Pragma_Complex_Representation => Complex_Representation : declare + E_Id : Entity_Id; + E : Entity_Id; + Ent : Entity_Id; + + begin + GNAT_Pragma; + Check_Arg_Count (1); + Check_Optional_Identifier (Arg1, Name_Entity); + Check_Arg_Is_Local_Name (Arg1); + E_Id := Expression (Arg1); + + if Etype (E_Id) = Any_Type then + return; + end if; + + E := Entity (E_Id); + + if not Is_Record_Type (E) then + Error_Pragma_Arg + ("argument for pragma% must be record type", Arg1); + end if; + + Ent := First_Entity (E); + + if No (Ent) + or else No (Next_Entity (Ent)) + or else Present (Next_Entity (Next_Entity (Ent))) + or else not Is_Floating_Point_Type (Etype (Ent)) + or else Etype (Ent) /= Etype (Next_Entity (Ent)) + then + Error_Pragma_Arg + ("record for pragma% must have two fields of the same " + & "floating-point type", Arg1); + + else + Set_Has_Complex_Representation (Base_Type (E)); + + -- We need to treat the type has having a non-standard + -- representation, for back-end purposes, even though in + -- general a complex will have the default representation + -- of a record with two real components. + + Set_Has_Non_Standard_Rep (Base_Type (E)); + end if; + end Complex_Representation; + + ------------------------- + -- Component_Alignment -- + ------------------------- + + -- pragma Component_Alignment ( + -- [Form =>] ALIGNMENT_CHOICE + -- [, [Name =>] type_LOCAL_NAME]); + -- + -- ALIGNMENT_CHOICE ::= + -- Component_Size + -- | Component_Size_4 + -- | Storage_Unit + -- | Default + + when Pragma_Component_Alignment => Component_AlignmentP : declare + Args : Args_List (1 .. 2); + Names : constant Name_List (1 .. 2) := ( + Name_Form, + Name_Name); + + Form : Node_Id renames Args (1); + Name : Node_Id renames Args (2); + + Atype : Component_Alignment_Kind; + Typ : Entity_Id; + + begin + GNAT_Pragma; + Gather_Associations (Names, Args); + + if No (Form) then + Error_Pragma ("missing Form argument for pragma%"); + end if; + + Check_Arg_Is_Identifier (Form); + + -- Get proper alignment, note that Default = Component_Size + -- on all machines we have so far, and we want to set this + -- value rather than the default value to indicate that it + -- has been explicitly set (and thus will not get overridden + -- by the default component alignment for the current scope) + + if Chars (Form) = Name_Component_Size then + Atype := Calign_Component_Size; + + elsif Chars (Form) = Name_Component_Size_4 then + Atype := Calign_Component_Size_4; + + elsif Chars (Form) = Name_Default then + Atype := Calign_Component_Size; + + elsif Chars (Form) = Name_Storage_Unit then + Atype := Calign_Storage_Unit; + + else + Error_Pragma_Arg + ("invalid Form parameter for pragma%", Form); + end if; + + -- Case with no name, supplied, affects scope table entry + + if No (Name) then + Scope_Stack.Table + (Scope_Stack.Last).Component_Alignment_Default := Atype; + + -- Case of name supplied + + else + Check_Arg_Is_Local_Name (Name); + Find_Type (Name); + Typ := Entity (Name); + + if Typ = Any_Type + or else Rep_Item_Too_Early (Typ, N) + then + return; + else + Typ := Underlying_Type (Typ); + end if; + + if not Is_Record_Type (Typ) + and then not Is_Array_Type (Typ) + then + Error_Pragma_Arg + ("Name parameter of pragma% must identify record or " & + "array type", Name); + end if; + + -- An explicit Component_Alignment pragma overrides an + -- implicit pragma Pack, but not an explicit one. + + if not Has_Pragma_Pack (Base_Type (Typ)) then + Set_Is_Packed (Base_Type (Typ), False); + Set_Component_Alignment (Base_Type (Typ), Atype); + end if; + end if; + end Component_AlignmentP; + + ---------------- + -- Controlled -- + ---------------- + + -- pragma Controlled (first_subtype_LOCAL_NAME); + + when Pragma_Controlled => Controlled : declare + Arg : Node_Id; + + begin + Check_No_Identifiers; + Check_Arg_Count (1); + Check_Arg_Is_Local_Name (Arg1); + Arg := Expression (Arg1); + + if not Is_Entity_Name (Arg) + or else not Is_Access_Type (Entity (Arg)) + then + Error_Pragma_Arg ("pragma% requires access type", Arg1); + else + Set_Has_Pragma_Controlled (Base_Type (Entity (Arg))); + end if; + end Controlled; + + ---------------- + -- Convention -- + ---------------- + + -- pragma Convention ([Convention =>] convention_IDENTIFIER, + -- [Entity =>] LOCAL_NAME); + + when Pragma_Convention => Convention : declare + C : Convention_Id; + E : Entity_Id; + pragma Warnings (Off, C); + pragma Warnings (Off, E); + begin + Check_Arg_Order ((Name_Convention, Name_Entity)); + Check_Ada_83_Warning; + Check_Arg_Count (2); + Process_Convention (C, E); + end Convention; + + --------------------------- + -- Convention_Identifier -- + --------------------------- + + -- pragma Convention_Identifier ([Name =>] IDENTIFIER, + -- [Convention =>] convention_IDENTIFIER); + + when Pragma_Convention_Identifier => Convention_Identifier : declare + Idnam : Name_Id; + Cname : Name_Id; + + begin + GNAT_Pragma; + Check_Arg_Order ((Name_Name, Name_Convention)); + Check_Arg_Count (2); + Check_Optional_Identifier (Arg1, Name_Name); + Check_Optional_Identifier (Arg2, Name_Convention); + Check_Arg_Is_Identifier (Arg1); + Check_Arg_Is_Identifier (Arg2); + Idnam := Chars (Expression (Arg1)); + Cname := Chars (Expression (Arg2)); + + if Is_Convention_Name (Cname) then + Record_Convention_Identifier + (Idnam, Get_Convention_Id (Cname)); + else + Error_Pragma_Arg + ("second arg for % pragma must be convention", Arg2); + end if; + end Convention_Identifier; + + --------------- + -- CPP_Class -- + --------------- + + -- pragma CPP_Class ([Entity =>] local_NAME) + + when Pragma_CPP_Class => CPP_Class : declare + Arg : Node_Id; + Typ : Entity_Id; + + begin + if Warn_On_Obsolescent_Feature then + Error_Msg_N + ("'G'N'A'T pragma cpp'_class is now obsolete; replace it" & + " by pragma import?", N); + end if; + + GNAT_Pragma; + Check_Arg_Count (1); + Check_Optional_Identifier (Arg1, Name_Entity); + Check_Arg_Is_Local_Name (Arg1); + + Arg := Expression (Arg1); + Analyze (Arg); + + if Etype (Arg) = Any_Type then + return; + end if; + + if not Is_Entity_Name (Arg) + or else not Is_Type (Entity (Arg)) + then + Error_Pragma_Arg ("pragma% requires a type mark", Arg1); + end if; + + Typ := Entity (Arg); + + if not Is_Tagged_Type (Typ) then + Error_Pragma_Arg ("pragma% applicable to tagged types ", Arg1); + end if; + + -- Types treated as CPP classes are treated as limited, but we + -- don't require them to be declared this way. A warning is issued + -- to encourage the user to declare them as limited. This is not + -- an error, for compatibility reasons, because these types have + -- been supported this way for some time. + + if not Is_Limited_Type (Typ) then + Error_Msg_N + ("imported 'C'P'P type should be " & + "explicitly declared limited?", + Get_Pragma_Arg (Arg1)); + Error_Msg_N + ("\type will be considered limited", + Get_Pragma_Arg (Arg1)); + end if; + + Set_Is_CPP_Class (Typ); + Set_Is_Limited_Record (Typ); + Set_Convention (Typ, Convention_CPP); + end CPP_Class; + + --------------------- + -- CPP_Constructor -- + --------------------- + + -- pragma CPP_Constructor ([Entity =>] LOCAL_NAME + -- [, [External_Name =>] static_string_EXPRESSION ] + -- [, [Link_Name =>] static_string_EXPRESSION ]); + + when Pragma_CPP_Constructor => CPP_Constructor : declare + Id : Entity_Id; + Def_Id : Entity_Id; + + begin + GNAT_Pragma; + Check_At_Least_N_Arguments (1); + Check_At_Most_N_Arguments (3); + Check_Optional_Identifier (Arg1, Name_Entity); + Check_Arg_Is_Local_Name (Arg1); + + Id := Expression (Arg1); + Find_Program_Unit_Name (Id); + + -- If we did not find the name, we are done + + if Etype (Id) = Any_Type then + return; + end if; + + Def_Id := Entity (Id); + + if Ekind (Def_Id) = E_Function + and then Is_Class_Wide_Type (Etype (Def_Id)) + and then Is_CPP_Class (Etype (Etype (Def_Id))) + then + if Arg_Count >= 2 then + Set_Imported (Def_Id); + Set_Is_Public (Def_Id); + Process_Interface_Name (Def_Id, Arg2, Arg3); + end if; + + if No (Parameter_Specifications (Parent (Def_Id))) then + Set_Has_Completion (Def_Id); + Set_Is_Constructor (Def_Id); + else + Error_Pragma_Arg + ("non-default constructors not implemented", Arg1); + end if; + + else + Error_Pragma_Arg + ("pragma% requires function returning a 'C'P'P_Class type", + Arg1); + end if; + end CPP_Constructor; + + ----------------- + -- CPP_Virtual -- + ----------------- + + when Pragma_CPP_Virtual => CPP_Virtual : declare + begin + GNAT_Pragma; + + if Warn_On_Obsolescent_Feature then + Error_Msg_N + ("'G'N'A'T pragma cpp'_virtual is now obsolete and has " & + "no effect?", N); + end if; + end CPP_Virtual; + + ---------------- + -- CPP_Vtable -- + ---------------- + + when Pragma_CPP_Vtable => CPP_Vtable : declare + begin + GNAT_Pragma; + + if Warn_On_Obsolescent_Feature then + Error_Msg_N + ("'G'N'A'T pragma cpp'_vtable is now obsolete and has " & + "no effect?", N); + end if; + end CPP_Vtable; + + ----------- + -- Debug -- + ----------- + + -- pragma Debug ([boolean_EXPRESSION,] PROCEDURE_CALL_STATEMENT); + + when Pragma_Debug => Debug : declare + Cond : Node_Id; + + begin + GNAT_Pragma; + + Cond := + New_Occurrence_Of + (Boolean_Literals (Debug_Pragmas_Enabled and Expander_Active), + Loc); + + if Arg_Count = 2 then + Cond := + Make_And_Then (Loc, + Left_Opnd => Relocate_Node (Cond), + Right_Opnd => Expression (Arg1)); + end if; + + -- Rewrite into a conditional with an appropriate condition. We + -- wrap the procedure call in a block so that overhead from e.g. + -- use of the secondary stack does not generate execution overhead + -- for suppressed conditions. + + Rewrite (N, Make_Implicit_If_Statement (N, + Condition => Cond, + Then_Statements => New_List ( + Make_Block_Statement (Loc, + Handled_Statement_Sequence => + Make_Handled_Sequence_Of_Statements (Loc, + Statements => New_List ( + Relocate_Node (Debug_Statement (N)))))))); + Analyze (N); + end Debug; + + ------------------ + -- Debug_Policy -- + ------------------ + + -- pragma Debug_Policy (Check | Ignore) + + when Pragma_Debug_Policy => + GNAT_Pragma; + Check_Arg_Count (1); + Check_Arg_Is_One_Of (Arg1, Name_Check, Name_Ignore); + Debug_Pragmas_Enabled := Chars (Expression (Arg1)) = Name_Check; + + --------------------- + -- Detect_Blocking -- + --------------------- + + -- pragma Detect_Blocking; + + when Pragma_Detect_Blocking => + Ada_2005_Pragma; + Check_Arg_Count (0); + Check_Valid_Configuration_Pragma; + Detect_Blocking := True; + + ------------------- + -- Discard_Names -- + ------------------- + + -- pragma Discard_Names [([On =>] LOCAL_NAME)]; + + when Pragma_Discard_Names => Discard_Names : declare + E : Entity_Id; + E_Id : Entity_Id; + + begin + Check_Ada_83_Warning; + + -- Deal with configuration pragma case + + if Arg_Count = 0 and then Is_Configuration_Pragma then + Global_Discard_Names := True; + return; + + -- Otherwise, check correct appropriate context + + else + Check_Is_In_Decl_Part_Or_Package_Spec; + + if Arg_Count = 0 then + + -- If there is no parameter, then from now on this pragma + -- applies to any enumeration, exception or tagged type + -- defined in the current declarative part, and recursively + -- to any nested scope. + + Set_Discard_Names (Current_Scope); + return; + + else + Check_Arg_Count (1); + Check_Optional_Identifier (Arg1, Name_On); + Check_Arg_Is_Local_Name (Arg1); + + E_Id := Expression (Arg1); + + if Etype (E_Id) = Any_Type then + return; + else + E := Entity (E_Id); + end if; + + if (Is_First_Subtype (E) + and then + (Is_Enumeration_Type (E) or else Is_Tagged_Type (E))) + or else Ekind (E) = E_Exception + then + Set_Discard_Names (E); + else + Error_Pragma_Arg + ("inappropriate entity for pragma%", Arg1); + end if; + + end if; + end if; + end Discard_Names; + + --------------- + -- Elaborate -- + --------------- + + -- pragma Elaborate (library_unit_NAME {, library_unit_NAME}); + + when Pragma_Elaborate => Elaborate : declare + Arg : Node_Id; + Citem : Node_Id; + + begin + -- Pragma must be in context items list of a compilation unit + + if not Is_In_Context_Clause then + Pragma_Misplaced; + end if; + + -- Must be at least one argument + + if Arg_Count = 0 then + Error_Pragma ("pragma% requires at least one argument"); + end if; + + -- In Ada 83 mode, there can be no items following it in the + -- context list except other pragmas and implicit with clauses + -- (e.g. those added by use of Rtsfind). In Ada 95 mode, this + -- placement rule does not apply. + + if Ada_Version = Ada_83 and then Comes_From_Source (N) then + Citem := Next (N); + while Present (Citem) loop + if Nkind (Citem) = N_Pragma + or else (Nkind (Citem) = N_With_Clause + and then Implicit_With (Citem)) + then + null; + else + Error_Pragma + ("(Ada 83) pragma% must be at end of context clause"); + end if; + + Next (Citem); + end loop; + end if; + + -- Finally, the arguments must all be units mentioned in a with + -- clause in the same context clause. Note we already checked (in + -- Par.Prag) that the arguments are all identifiers or selected + -- components. + + Arg := Arg1; + Outer : while Present (Arg) loop + Citem := First (List_Containing (N)); + Inner : while Citem /= N loop + if Nkind (Citem) = N_With_Clause + and then Same_Name (Name (Citem), Expression (Arg)) + then + Set_Elaborate_Present (Citem, True); + Set_Unit_Name (Expression (Arg), Name (Citem)); + + -- With the pragma present, elaboration calls on + -- subprograms from the named unit need no further + -- checks, as long as the pragma appears in the current + -- compilation unit. If the pragma appears in some unit + -- in the context, there might still be a need for an + -- Elaborate_All_Desirable from the current compilation + -- to the named unit, so we keep the check enabled. + + if In_Extended_Main_Source_Unit (N) then + Set_Suppress_Elaboration_Warnings + (Entity (Name (Citem))); + end if; + + exit Inner; + end if; + + Next (Citem); + end loop Inner; + + if Citem = N then + Error_Pragma_Arg + ("argument of pragma% is not with'ed unit", Arg); + end if; + + Next (Arg); + end loop Outer; + + -- Give a warning if operating in static mode with -gnatwl + -- (elaboration warnings enabled) switch set. + + if Elab_Warnings and not Dynamic_Elaboration_Checks then + Error_Msg_N + ("?use of pragma Elaborate may not be safe", N); + Error_Msg_N + ("?use pragma Elaborate_All instead if possible", N); + end if; + end Elaborate; + + ------------------- + -- Elaborate_All -- + ------------------- + + -- pragma Elaborate_All (library_unit_NAME {, library_unit_NAME}); + + when Pragma_Elaborate_All => Elaborate_All : declare + Arg : Node_Id; + Citem : Node_Id; + + begin + Check_Ada_83_Warning; + + -- Pragma must be in context items list of a compilation unit + + if not Is_In_Context_Clause then + Pragma_Misplaced; + end if; + + -- Must be at least one argument + + if Arg_Count = 0 then + Error_Pragma ("pragma% requires at least one argument"); + end if; + + -- Note: unlike pragma Elaborate, pragma Elaborate_All does not + -- have to appear at the end of the context clause, but may + -- appear mixed in with other items, even in Ada 83 mode. + + -- Final check: the arguments must all be units mentioned in + -- a with clause in the same context clause. Note that we + -- already checked (in Par.Prag) that all the arguments are + -- either identifiers or selected components. + + Arg := Arg1; + Outr : while Present (Arg) loop + Citem := First (List_Containing (N)); + Innr : while Citem /= N loop + if Nkind (Citem) = N_With_Clause + and then Same_Name (Name (Citem), Expression (Arg)) + then + Set_Elaborate_All_Present (Citem, True); + Set_Unit_Name (Expression (Arg), Name (Citem)); + + -- Suppress warnings and elaboration checks on the named + -- unit if the pragma is in the current compilation, as + -- for pragma Elaborate. + + if In_Extended_Main_Source_Unit (N) then + Set_Suppress_Elaboration_Warnings + (Entity (Name (Citem))); + end if; + exit Innr; + end if; + + Next (Citem); + end loop Innr; + + if Citem = N then + Set_Error_Posted (N); + Error_Pragma_Arg + ("argument of pragma% is not with'ed unit", Arg); + end if; + + Next (Arg); + end loop Outr; + end Elaborate_All; + + -------------------- + -- Elaborate_Body -- + -------------------- + + -- pragma Elaborate_Body [( library_unit_NAME )]; + + when Pragma_Elaborate_Body => Elaborate_Body : declare + Cunit_Node : Node_Id; + Cunit_Ent : Entity_Id; + + begin + Check_Ada_83_Warning; + Check_Valid_Library_Unit_Pragma; + + if Nkind (N) = N_Null_Statement then + return; + end if; + + Cunit_Node := Cunit (Current_Sem_Unit); + Cunit_Ent := Cunit_Entity (Current_Sem_Unit); + + if Nkind (Unit (Cunit_Node)) = N_Package_Body + or else + Nkind (Unit (Cunit_Node)) = N_Subprogram_Body + then + Error_Pragma ("pragma% must refer to a spec, not a body"); + else + Set_Body_Required (Cunit_Node, True); + Set_Has_Pragma_Elaborate_Body (Cunit_Ent); + + -- If we are in dynamic elaboration mode, then we suppress + -- elaboration warnings for the unit, since it is definitely + -- fine NOT to do dynamic checks at the first level (and such + -- checks will be suppressed because no elaboration boolean + -- is created for Elaborate_Body packages). + + -- But in the static model of elaboration, Elaborate_Body is + -- definitely NOT good enough to ensure elaboration safety on + -- its own, since the body may WITH other units that are not + -- safe from an elaboration point of view, so a client must + -- still do an Elaborate_All on such units. + + -- Debug flag -gnatdD restores the old behavior of 3.13, + -- where Elaborate_Body always suppressed elab warnings. + + if Dynamic_Elaboration_Checks or Debug_Flag_DD then + Set_Suppress_Elaboration_Warnings (Cunit_Ent); + end if; + end if; + end Elaborate_Body; + + ------------------------ + -- Elaboration_Checks -- + ------------------------ + + -- pragma Elaboration_Checks (Static | Dynamic); + + when Pragma_Elaboration_Checks => + GNAT_Pragma; + Check_Arg_Count (1); + Check_Arg_Is_One_Of (Arg1, Name_Static, Name_Dynamic); + Dynamic_Elaboration_Checks := + (Chars (Get_Pragma_Arg (Arg1)) = Name_Dynamic); + + --------------- + -- Eliminate -- + --------------- + + -- pragma Eliminate ( + -- [Unit_Name =>] IDENTIFIER | + -- SELECTED_COMPONENT + -- [,[Entity =>] IDENTIFIER | + -- SELECTED_COMPONENT | + -- STRING_LITERAL] + -- [,]OVERLOADING_RESOLUTION); + + -- OVERLOADING_RESOLUTION ::= PARAMETER_AND_RESULT_TYPE_PROFILE | + -- SOURCE_LOCATION + + -- PARAMETER_AND_RESULT_TYPE_PROFILE ::= PROCEDURE_PROFILE | + -- FUNCTION_PROFILE + + -- PROCEDURE_PROFILE ::= Parameter_Types => PARAMETER_TYPES + + -- FUNCTION_PROFILE ::= [Parameter_Types => PARAMETER_TYPES,] + -- Result_Type => result_SUBTYPE_NAME] + + -- PARAMETER_TYPES ::= (SUBTYPE_NAME {, SUBTYPE_NAME}) + -- SUBTYPE_NAME ::= STRING_LITERAL + + -- SOURCE_LOCATION ::= Source_Location => SOURCE_TRACE + -- SOURCE_TRACE ::= STRING_LITERAL + + when Pragma_Eliminate => Eliminate : declare + Args : Args_List (1 .. 5); + Names : constant Name_List (1 .. 5) := ( + Name_Unit_Name, + Name_Entity, + Name_Parameter_Types, + Name_Result_Type, + Name_Source_Location); + + Unit_Name : Node_Id renames Args (1); + Entity : Node_Id renames Args (2); + Parameter_Types : Node_Id renames Args (3); + Result_Type : Node_Id renames Args (4); + Source_Location : Node_Id renames Args (5); + + begin + GNAT_Pragma; + Check_Valid_Configuration_Pragma; + Gather_Associations (Names, Args); + + if No (Unit_Name) then + Error_Pragma ("missing Unit_Name argument for pragma%"); + end if; + + if No (Entity) + and then (Present (Parameter_Types) + or else + Present (Result_Type) + or else + Present (Source_Location)) + then + Error_Pragma ("missing Entity argument for pragma%"); + end if; + + if (Present (Parameter_Types) + or else + Present (Result_Type)) + and then + Present (Source_Location) + then + Error_Pragma + ("parameter profile and source location cannot " & + "be used together in pragma%"); + end if; + + Process_Eliminate_Pragma + (N, + Unit_Name, + Entity, + Parameter_Types, + Result_Type, + Source_Location); + end Eliminate; + + ------------ + -- Export -- + ------------ + + -- pragma Export ( + -- [ Convention =>] convention_IDENTIFIER, + -- [ Entity =>] local_NAME + -- [, [External_Name =>] static_string_EXPRESSION ] + -- [, [Link_Name =>] static_string_EXPRESSION ]); + + when Pragma_Export => Export : declare + C : Convention_Id; + Def_Id : Entity_Id; + + pragma Warnings (Off, C); + + begin + Check_Ada_83_Warning; + Check_Arg_Order + ((Name_Convention, + Name_Entity, + Name_External_Name, + Name_Link_Name)); + Check_At_Least_N_Arguments (2); + Check_At_Most_N_Arguments (4); + Process_Convention (C, Def_Id); + + if Ekind (Def_Id) /= E_Constant then + Note_Possible_Modification (Expression (Arg2), Sure => False); + end if; + + Process_Interface_Name (Def_Id, Arg3, Arg4); + Set_Exported (Def_Id, Arg2); + + -- If the entity is a deferred constant, propagate the + -- information to the full view, because gigi elaborates + -- the full view only. + + if Ekind (Def_Id) = E_Constant + and then Present (Full_View (Def_Id)) + then + declare + Id2 : constant Entity_Id := Full_View (Def_Id); + begin + Set_Is_Exported (Id2, Is_Exported (Def_Id)); + Set_First_Rep_Item (Id2, First_Rep_Item (Def_Id)); + Set_Interface_Name (Id2, Einfo.Interface_Name (Def_Id)); + end; + end if; + end Export; + + ---------------------- + -- Export_Exception -- + ---------------------- + + -- pragma Export_Exception ( + -- [Internal =>] LOCAL_NAME + -- [, [External =>] EXTERNAL_SYMBOL] + -- [, [Form =>] Ada | VMS] + -- [, [Code =>] static_integer_EXPRESSION]); + + when Pragma_Export_Exception => Export_Exception : declare + Args : Args_List (1 .. 4); + Names : constant Name_List (1 .. 4) := ( + Name_Internal, + Name_External, + Name_Form, + Name_Code); + + Internal : Node_Id renames Args (1); + External : Node_Id renames Args (2); + Form : Node_Id renames Args (3); + Code : Node_Id renames Args (4); + + begin + GNAT_Pragma; + + if Inside_A_Generic then + Error_Pragma ("pragma% cannot be used for generic entities"); + end if; + + Gather_Associations (Names, Args); + Process_Extended_Import_Export_Exception_Pragma ( + Arg_Internal => Internal, + Arg_External => External, + Arg_Form => Form, + Arg_Code => Code); + + if not Is_VMS_Exception (Entity (Internal)) then + Set_Exported (Entity (Internal), Internal); + end if; + end Export_Exception; + + --------------------- + -- Export_Function -- + --------------------- + + -- pragma Export_Function ( + -- [Internal =>] LOCAL_NAME + -- [, [External =>] EXTERNAL_SYMBOL] + -- [, [Parameter_Types =>] (PARAMETER_TYPES)] + -- [, [Result_Type =>] TYPE_DESIGNATOR] + -- [, [Mechanism =>] MECHANISM] + -- [, [Result_Mechanism =>] MECHANISM_NAME]); + + -- EXTERNAL_SYMBOL ::= + -- IDENTIFIER + -- | static_string_EXPRESSION + + -- PARAMETER_TYPES ::= + -- null + -- | TYPE_DESIGNATOR @{, TYPE_DESIGNATOR@} + + -- TYPE_DESIGNATOR ::= + -- subtype_NAME + -- | subtype_Name ' Access + + -- MECHANISM ::= + -- MECHANISM_NAME + -- | (MECHANISM_ASSOCIATION @{, MECHANISM_ASSOCIATION@}) + + -- MECHANISM_ASSOCIATION ::= + -- [formal_parameter_NAME =>] MECHANISM_NAME + + -- MECHANISM_NAME ::= + -- Value + -- | Reference + -- | Descriptor [([Class =>] CLASS_NAME)] + + -- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca + + when Pragma_Export_Function => Export_Function : declare + Args : Args_List (1 .. 6); + Names : constant Name_List (1 .. 6) := ( + Name_Internal, + Name_External, + Name_Parameter_Types, + Name_Result_Type, + Name_Mechanism, + Name_Result_Mechanism); + + Internal : Node_Id renames Args (1); + External : Node_Id renames Args (2); + Parameter_Types : Node_Id renames Args (3); + Result_Type : Node_Id renames Args (4); + Mechanism : Node_Id renames Args (5); + Result_Mechanism : Node_Id renames Args (6); + + begin + GNAT_Pragma; + Gather_Associations (Names, Args); + Process_Extended_Import_Export_Subprogram_Pragma ( + Arg_Internal => Internal, + Arg_External => External, + Arg_Parameter_Types => Parameter_Types, + Arg_Result_Type => Result_Type, + Arg_Mechanism => Mechanism, + Arg_Result_Mechanism => Result_Mechanism); + end Export_Function; + + ------------------- + -- Export_Object -- + ------------------- + + -- pragma Export_Object ( + -- [Internal =>] LOCAL_NAME + -- [, [External =>] EXTERNAL_SYMBOL] + -- [, [Size =>] EXTERNAL_SYMBOL]); + + -- EXTERNAL_SYMBOL ::= + -- IDENTIFIER + -- | static_string_EXPRESSION + + -- PARAMETER_TYPES ::= + -- null + -- | TYPE_DESIGNATOR @{, TYPE_DESIGNATOR@} + + -- TYPE_DESIGNATOR ::= + -- subtype_NAME + -- | subtype_Name ' Access + + -- MECHANISM ::= + -- MECHANISM_NAME + -- | (MECHANISM_ASSOCIATION @{, MECHANISM_ASSOCIATION@}) + + -- MECHANISM_ASSOCIATION ::= + -- [formal_parameter_NAME =>] MECHANISM_NAME + + -- MECHANISM_NAME ::= + -- Value + -- | Reference + -- | Descriptor [([Class =>] CLASS_NAME)] + + -- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca + + when Pragma_Export_Object => Export_Object : declare + Args : Args_List (1 .. 3); + Names : constant Name_List (1 .. 3) := ( + Name_Internal, + Name_External, + Name_Size); + + Internal : Node_Id renames Args (1); + External : Node_Id renames Args (2); + Size : Node_Id renames Args (3); + + begin + GNAT_Pragma; + Gather_Associations (Names, Args); + Process_Extended_Import_Export_Object_Pragma ( + Arg_Internal => Internal, + Arg_External => External, + Arg_Size => Size); + end Export_Object; + + ---------------------- + -- Export_Procedure -- + ---------------------- + + -- pragma Export_Procedure ( + -- [Internal =>] LOCAL_NAME + -- [, [External =>] EXTERNAL_SYMBOL] + -- [, [Parameter_Types =>] (PARAMETER_TYPES)] + -- [, [Mechanism =>] MECHANISM]); + + -- EXTERNAL_SYMBOL ::= + -- IDENTIFIER + -- | static_string_EXPRESSION + + -- PARAMETER_TYPES ::= + -- null + -- | TYPE_DESIGNATOR @{, TYPE_DESIGNATOR@} + + -- TYPE_DESIGNATOR ::= + -- subtype_NAME + -- | subtype_Name ' Access + + -- MECHANISM ::= + -- MECHANISM_NAME + -- | (MECHANISM_ASSOCIATION @{, MECHANISM_ASSOCIATION@}) + + -- MECHANISM_ASSOCIATION ::= + -- [formal_parameter_NAME =>] MECHANISM_NAME + + -- MECHANISM_NAME ::= + -- Value + -- | Reference + -- | Descriptor [([Class =>] CLASS_NAME)] + + -- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca + + when Pragma_Export_Procedure => Export_Procedure : declare + Args : Args_List (1 .. 4); + Names : constant Name_List (1 .. 4) := ( + Name_Internal, + Name_External, + Name_Parameter_Types, + Name_Mechanism); + + Internal : Node_Id renames Args (1); + External : Node_Id renames Args (2); + Parameter_Types : Node_Id renames Args (3); + Mechanism : Node_Id renames Args (4); + + begin + GNAT_Pragma; + Gather_Associations (Names, Args); + Process_Extended_Import_Export_Subprogram_Pragma ( + Arg_Internal => Internal, + Arg_External => External, + Arg_Parameter_Types => Parameter_Types, + Arg_Mechanism => Mechanism); + end Export_Procedure; + + ------------------ + -- Export_Value -- + ------------------ + + -- pragma Export_Value ( + -- [Value =>] static_integer_EXPRESSION, + -- [Link_Name =>] static_string_EXPRESSION); + + when Pragma_Export_Value => + GNAT_Pragma; + Check_Arg_Order ((Name_Value, Name_Link_Name)); + Check_Arg_Count (2); + + Check_Optional_Identifier (Arg1, Name_Value); + Check_Arg_Is_Static_Expression (Arg1, Any_Integer); + + Check_Optional_Identifier (Arg2, Name_Link_Name); + Check_Arg_Is_Static_Expression (Arg2, Standard_String); + + ----------------------------- + -- Export_Valued_Procedure -- + ----------------------------- + + -- pragma Export_Valued_Procedure ( + -- [Internal =>] LOCAL_NAME + -- [, [External =>] EXTERNAL_SYMBOL,] + -- [, [Parameter_Types =>] (PARAMETER_TYPES)] + -- [, [Mechanism =>] MECHANISM]); + + -- EXTERNAL_SYMBOL ::= + -- IDENTIFIER + -- | static_string_EXPRESSION + + -- PARAMETER_TYPES ::= + -- null + -- | TYPE_DESIGNATOR @{, TYPE_DESIGNATOR@} + + -- TYPE_DESIGNATOR ::= + -- subtype_NAME + -- | subtype_Name ' Access + + -- MECHANISM ::= + -- MECHANISM_NAME + -- | (MECHANISM_ASSOCIATION @{, MECHANISM_ASSOCIATION@}) + + -- MECHANISM_ASSOCIATION ::= + -- [formal_parameter_NAME =>] MECHANISM_NAME + + -- MECHANISM_NAME ::= + -- Value + -- | Reference + -- | Descriptor [([Class =>] CLASS_NAME)] + + -- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca + + when Pragma_Export_Valued_Procedure => + Export_Valued_Procedure : declare + Args : Args_List (1 .. 4); + Names : constant Name_List (1 .. 4) := ( + Name_Internal, + Name_External, + Name_Parameter_Types, + Name_Mechanism); + + Internal : Node_Id renames Args (1); + External : Node_Id renames Args (2); + Parameter_Types : Node_Id renames Args (3); + Mechanism : Node_Id renames Args (4); + + begin + GNAT_Pragma; + Gather_Associations (Names, Args); + Process_Extended_Import_Export_Subprogram_Pragma ( + Arg_Internal => Internal, + Arg_External => External, + Arg_Parameter_Types => Parameter_Types, + Arg_Mechanism => Mechanism); + end Export_Valued_Procedure; + + ------------------- + -- Extend_System -- + ------------------- + + -- pragma Extend_System ([Name =>] Identifier); + + when Pragma_Extend_System => Extend_System : declare + begin + GNAT_Pragma; + Check_Valid_Configuration_Pragma; + Check_Arg_Count (1); + Check_Optional_Identifier (Arg1, Name_Name); + Check_Arg_Is_Identifier (Arg1); + + Get_Name_String (Chars (Expression (Arg1))); + + if Name_Len > 4 + and then Name_Buffer (1 .. 4) = "aux_" + then + if Present (System_Extend_Pragma_Arg) then + if Chars (Expression (Arg1)) = + Chars (Expression (System_Extend_Pragma_Arg)) + then + null; + else + Error_Msg_Sloc := Sloc (System_Extend_Pragma_Arg); + Error_Pragma ("pragma% conflicts with that #"); + end if; + + else + System_Extend_Pragma_Arg := Arg1; + + if not GNAT_Mode then + System_Extend_Unit := Arg1; + end if; + end if; + else + Error_Pragma ("incorrect name for pragma%, must be Aux_xxx"); + end if; + end Extend_System; + + ------------------------ + -- Extensions_Allowed -- + ------------------------ + + -- pragma Extensions_Allowed (ON | OFF); + + when Pragma_Extensions_Allowed => + GNAT_Pragma; + Check_Arg_Count (1); + Check_No_Identifiers; + Check_Arg_Is_One_Of (Arg1, Name_On, Name_Off); + + if Chars (Expression (Arg1)) = Name_On then + Extensions_Allowed := True; + else + Extensions_Allowed := False; + end if; + + -------------- + -- External -- + -------------- + + -- pragma External ( + -- [ Convention =>] convention_IDENTIFIER, + -- [ Entity =>] local_NAME + -- [, [External_Name =>] static_string_EXPRESSION ] + -- [, [Link_Name =>] static_string_EXPRESSION ]); + + when Pragma_External => External : declare + Def_Id : Entity_Id; + + C : Convention_Id; + pragma Warnings (Off, C); + + begin + GNAT_Pragma; + Check_Arg_Order + ((Name_Convention, + Name_Entity, + Name_External_Name, + Name_Link_Name)); + Check_At_Least_N_Arguments (2); + Check_At_Most_N_Arguments (4); + Process_Convention (C, Def_Id); + Note_Possible_Modification (Expression (Arg2), Sure => False); + Process_Interface_Name (Def_Id, Arg3, Arg4); + Set_Exported (Def_Id, Arg2); + end External; + + -------------------------- + -- External_Name_Casing -- + -------------------------- + + -- pragma External_Name_Casing ( + -- UPPERCASE | LOWERCASE + -- [, AS_IS | UPPERCASE | LOWERCASE]); + + when Pragma_External_Name_Casing => External_Name_Casing : declare + begin + GNAT_Pragma; + Check_No_Identifiers; + + if Arg_Count = 2 then + Check_Arg_Is_One_Of + (Arg2, Name_As_Is, Name_Uppercase, Name_Lowercase); + + case Chars (Get_Pragma_Arg (Arg2)) is + when Name_As_Is => + Opt.External_Name_Exp_Casing := As_Is; + + when Name_Uppercase => + Opt.External_Name_Exp_Casing := Uppercase; + + when Name_Lowercase => + Opt.External_Name_Exp_Casing := Lowercase; + + when others => + null; + end case; + + else + Check_Arg_Count (1); + end if; + + Check_Arg_Is_One_Of (Arg1, Name_Uppercase, Name_Lowercase); + + case Chars (Get_Pragma_Arg (Arg1)) is + when Name_Uppercase => + Opt.External_Name_Imp_Casing := Uppercase; + + when Name_Lowercase => + Opt.External_Name_Imp_Casing := Lowercase; + + when others => + null; + end case; + end External_Name_Casing; + + -------------------------- + -- Favor_Top_Level -- + -------------------------- + + -- pragma Favor_Top_Level (type_NAME); + + when Pragma_Favor_Top_Level => Favor_Top_Level : declare + Named_Entity : Entity_Id; + + begin + GNAT_Pragma; + Check_No_Identifiers; + Check_Arg_Count (1); + Check_Arg_Is_Local_Name (Arg1); + Named_Entity := Entity (Expression (Arg1)); + + -- If it's an access-to-subprogram type (in particular, not a + -- subtype), set the flag on that type. + + if Is_Access_Subprogram_Type (Named_Entity) then + Set_Can_Use_Internal_Rep (Named_Entity, False); + + -- Otherwise it's an error (name denotes the wrong sort of entity) + + else + Error_Pragma_Arg + ("access-to-subprogram type expected", Expression (Arg1)); + end if; + end Favor_Top_Level; + + --------------- + -- Fast_Math -- + --------------- + + -- pragma Fast_Math; + + when Pragma_Fast_Math => + GNAT_Pragma; + Check_No_Identifiers; + Check_Valid_Configuration_Pragma; + Fast_Math := True; + + --------------------------- + -- Finalize_Storage_Only -- + --------------------------- + + -- pragma Finalize_Storage_Only (first_subtype_LOCAL_NAME); + + when Pragma_Finalize_Storage_Only => Finalize_Storage : declare + Assoc : constant Node_Id := Arg1; + Type_Id : constant Node_Id := Expression (Assoc); + Typ : Entity_Id; + + begin + GNAT_Pragma; + Check_No_Identifiers; + Check_Arg_Count (1); + Check_Arg_Is_Local_Name (Arg1); + + Find_Type (Type_Id); + Typ := Entity (Type_Id); + + if Typ = Any_Type + or else Rep_Item_Too_Early (Typ, N) + then + return; + else + Typ := Underlying_Type (Typ); + end if; + + if not Is_Controlled (Typ) then + Error_Pragma ("pragma% must specify controlled type"); + end if; + + Check_First_Subtype (Arg1); + + if Finalize_Storage_Only (Typ) then + Error_Pragma ("duplicate pragma%, only one allowed"); + + elsif not Rep_Item_Too_Late (Typ, N) then + Set_Finalize_Storage_Only (Base_Type (Typ), True); + end if; + end Finalize_Storage; + + -------------------------- + -- Float_Representation -- + -------------------------- + + -- pragma Float_Representation (FLOAT_REP[, float_type_LOCAL_NAME]); + + -- FLOAT_REP ::= VAX_Float | IEEE_Float + + when Pragma_Float_Representation => Float_Representation : declare + Argx : Node_Id; + Digs : Nat; + Ent : Entity_Id; + + begin + GNAT_Pragma; + + if Arg_Count = 1 then + Check_Valid_Configuration_Pragma; + else + Check_Arg_Count (2); + Check_Optional_Identifier (Arg2, Name_Entity); + Check_Arg_Is_Local_Name (Arg2); + end if; + + Check_No_Identifier (Arg1); + Check_Arg_Is_One_Of (Arg1, Name_VAX_Float, Name_IEEE_Float); + + if not OpenVMS_On_Target then + if Chars (Expression (Arg1)) = Name_VAX_Float then + Error_Pragma + ("?pragma% ignored (applies only to Open'V'M'S)"); + end if; + + return; + end if; + + -- One argument case + + if Arg_Count = 1 then + if Chars (Expression (Arg1)) = Name_VAX_Float then + if Opt.Float_Format = 'I' then + Error_Pragma ("'I'E'E'E format previously specified"); + end if; + + Opt.Float_Format := 'V'; + + else + if Opt.Float_Format = 'V' then + Error_Pragma ("'V'A'X format previously specified"); + end if; + + Opt.Float_Format := 'I'; + end if; + + Set_Standard_Fpt_Formats; + + -- Two argument case + + else + Argx := Get_Pragma_Arg (Arg2); + + if not Is_Entity_Name (Argx) + or else not Is_Floating_Point_Type (Entity (Argx)) + then + Error_Pragma_Arg + ("second argument of% pragma must be floating-point type", + Arg2); + end if; + + Ent := Entity (Argx); + Digs := UI_To_Int (Digits_Value (Ent)); + + -- Two arguments, VAX_Float case + + if Chars (Expression (Arg1)) = Name_VAX_Float then + case Digs is + when 6 => Set_F_Float (Ent); + when 9 => Set_D_Float (Ent); + when 15 => Set_G_Float (Ent); + + when others => + Error_Pragma_Arg + ("wrong digits value, must be 6,9 or 15", Arg2); + end case; + + -- Two arguments, IEEE_Float case + + else + case Digs is + when 6 => Set_IEEE_Short (Ent); + when 15 => Set_IEEE_Long (Ent); + + when others => + Error_Pragma_Arg + ("wrong digits value, must be 6 or 15", Arg2); + end case; + end if; + end if; + end Float_Representation; + + ----------- + -- Ident -- + ----------- + + -- pragma Ident (static_string_EXPRESSION) + + -- Note: pragma Comment shares this processing. Pragma Comment + -- is identical to Ident, except that the restriction of the + -- argument to 31 characters and the placement restrictions + -- are not enforced for pragma Comment. + + when Pragma_Ident | Pragma_Comment => Ident : declare + Str : Node_Id; + + begin + GNAT_Pragma; + Check_Arg_Count (1); + Check_No_Identifiers; + Check_Arg_Is_Static_Expression (Arg1, Standard_String); + + -- For pragma Ident, preserve DEC compatibility by requiring + -- the pragma to appear in a declarative part or package spec. + + if Prag_Id = Pragma_Ident then + Check_Is_In_Decl_Part_Or_Package_Spec; + end if; + + Str := Expr_Value_S (Expression (Arg1)); + + declare + CS : Node_Id; + GP : Node_Id; + + begin + GP := Parent (Parent (N)); + + if Nkind (GP) = N_Package_Declaration + or else + Nkind (GP) = N_Generic_Package_Declaration + then + GP := Parent (GP); + end if; + + -- If we have a compilation unit, then record the ident + -- value, checking for improper duplication. + + if Nkind (GP) = N_Compilation_Unit then + CS := Ident_String (Current_Sem_Unit); + + if Present (CS) then + + -- For Ident, we do not permit multiple instances + + if Prag_Id = Pragma_Ident then + Error_Pragma ("duplicate% pragma not permitted"); + + -- For Comment, we concatenate the string, unless we + -- want to preserve the tree structure for ASIS. + + elsif not ASIS_Mode then + Start_String (Strval (CS)); + Store_String_Char (' '); + Store_String_Chars (Strval (Str)); + Set_Strval (CS, End_String); + end if; + + else + -- In VMS, the effect of IDENT is achieved by passing + -- IDENTIFICATION=name as a --for-linker switch. + + if OpenVMS_On_Target then + Start_String; + Store_String_Chars + ("--for-linker=IDENTIFICATION="); + String_To_Name_Buffer (Strval (Str)); + Store_String_Chars (Name_Buffer (1 .. Name_Len)); + + -- Only the last processed IDENT is saved. The main + -- purpose is so an IDENT associated with a main + -- procedure will be used in preference to an IDENT + -- associated with a with'd package. + + Replace_Linker_Option_String + (End_String, "--for-linker=IDENTIFICATION="); + end if; + + Set_Ident_String (Current_Sem_Unit, Str); + end if; + + -- For subunits, we just ignore the Ident, since in GNAT + -- these are not separate object files, and hence not + -- separate units in the unit table. + + elsif Nkind (GP) = N_Subunit then + null; + + -- Otherwise we have a misplaced pragma Ident, but we ignore + -- this if we are in an instantiation, since it comes from + -- a generic, and has no relevance to the instantiation. + + elsif Prag_Id = Pragma_Ident then + if Instantiation_Location (Loc) = No_Location then + Error_Pragma ("pragma% only allowed at outer level"); + end if; + end if; + end; + end Ident; + + -------------------------- + -- Implemented_By_Entry -- + -------------------------- + + -- pragma Implemented_By_Entry (DIRECT_NAME); + + when Pragma_Implemented_By_Entry => Implemented_By_Entry : declare + Ent : Entity_Id; + + begin + Ada_2005_Pragma; + Check_Arg_Count (1); + Check_No_Identifiers; + Check_Arg_Is_Identifier (Arg1); + Check_Arg_Is_Local_Name (Arg1); + Ent := Entity (Expression (Arg1)); + + -- Pragma Implemented_By_Entry must be applied only to protected + -- synchronized or task interface primitives. + + if (Ekind (Ent) /= E_Function + and then Ekind (Ent) /= E_Procedure) + or else not Present (First_Formal (Ent)) + or else not Is_Concurrent_Interface (Etype (First_Formal (Ent))) + then + Error_Pragma_Arg + ("pragma % must be applied to a concurrent interface " & + "primitive", Arg1); + + else + if Einfo.Implemented_By_Entry (Ent) + and then Warn_On_Redundant_Constructs + then + Error_Pragma ("?duplicate pragma%!"); + else + Set_Implemented_By_Entry (Ent); + end if; + end if; + end Implemented_By_Entry; + + ----------------------- + -- Implicit_Packing -- + ----------------------- + + -- pragma Implicit_Packing; + + when Pragma_Implicit_Packing => + GNAT_Pragma; + Check_Arg_Count (0); + Implicit_Packing := True; + + ------------ + -- Import -- + ------------ + + -- pragma Import ( + -- [Convention =>] convention_IDENTIFIER, + -- [Entity =>] local_NAME + -- [, [External_Name =>] static_string_EXPRESSION ] + -- [, [Link_Name =>] static_string_EXPRESSION ]); + + when Pragma_Import => + Check_Ada_83_Warning; + Check_Arg_Order + ((Name_Convention, + Name_Entity, + Name_External_Name, + Name_Link_Name)); + Check_At_Least_N_Arguments (2); + Check_At_Most_N_Arguments (4); + Process_Import_Or_Interface; + + ---------------------- + -- Import_Exception -- + ---------------------- + + -- pragma Import_Exception ( + -- [Internal =>] LOCAL_NAME + -- [, [External =>] EXTERNAL_SYMBOL] + -- [, [Form =>] Ada | VMS] + -- [, [Code =>] static_integer_EXPRESSION]); + + when Pragma_Import_Exception => Import_Exception : declare + Args : Args_List (1 .. 4); + Names : constant Name_List (1 .. 4) := ( + Name_Internal, + Name_External, + Name_Form, + Name_Code); + + Internal : Node_Id renames Args (1); + External : Node_Id renames Args (2); + Form : Node_Id renames Args (3); + Code : Node_Id renames Args (4); + + begin + GNAT_Pragma; + Gather_Associations (Names, Args); + + if Present (External) and then Present (Code) then + Error_Pragma + ("cannot give both External and Code options for pragma%"); + end if; + + Process_Extended_Import_Export_Exception_Pragma ( + Arg_Internal => Internal, + Arg_External => External, + Arg_Form => Form, + Arg_Code => Code); + + if not Is_VMS_Exception (Entity (Internal)) then + Set_Imported (Entity (Internal)); + end if; + end Import_Exception; + + --------------------- + -- Import_Function -- + --------------------- + + -- pragma Import_Function ( + -- [Internal =>] LOCAL_NAME, + -- [, [External =>] EXTERNAL_SYMBOL] + -- [, [Parameter_Types =>] (PARAMETER_TYPES)] + -- [, [Result_Type =>] SUBTYPE_MARK] + -- [, [Mechanism =>] MECHANISM] + -- [, [Result_Mechanism =>] MECHANISM_NAME] + -- [, [First_Optional_Parameter =>] IDENTIFIER]); + + -- EXTERNAL_SYMBOL ::= + -- IDENTIFIER + -- | static_string_EXPRESSION + + -- PARAMETER_TYPES ::= + -- null + -- | TYPE_DESIGNATOR @{, TYPE_DESIGNATOR@} + + -- TYPE_DESIGNATOR ::= + -- subtype_NAME + -- | subtype_Name ' Access + + -- MECHANISM ::= + -- MECHANISM_NAME + -- | (MECHANISM_ASSOCIATION @{, MECHANISM_ASSOCIATION@}) + + -- MECHANISM_ASSOCIATION ::= + -- [formal_parameter_NAME =>] MECHANISM_NAME + + -- MECHANISM_NAME ::= + -- Value + -- | Reference + -- | Descriptor [([Class =>] CLASS_NAME)] + + -- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca + + when Pragma_Import_Function => Import_Function : declare + Args : Args_List (1 .. 7); + Names : constant Name_List (1 .. 7) := ( + Name_Internal, + Name_External, + Name_Parameter_Types, + Name_Result_Type, + Name_Mechanism, + Name_Result_Mechanism, + Name_First_Optional_Parameter); + + Internal : Node_Id renames Args (1); + External : Node_Id renames Args (2); + Parameter_Types : Node_Id renames Args (3); + Result_Type : Node_Id renames Args (4); + Mechanism : Node_Id renames Args (5); + Result_Mechanism : Node_Id renames Args (6); + First_Optional_Parameter : Node_Id renames Args (7); + + begin + GNAT_Pragma; + Gather_Associations (Names, Args); + Process_Extended_Import_Export_Subprogram_Pragma ( + Arg_Internal => Internal, + Arg_External => External, + Arg_Parameter_Types => Parameter_Types, + Arg_Result_Type => Result_Type, + Arg_Mechanism => Mechanism, + Arg_Result_Mechanism => Result_Mechanism, + Arg_First_Optional_Parameter => First_Optional_Parameter); + end Import_Function; + + ------------------- + -- Import_Object -- + ------------------- + + -- pragma Import_Object ( + -- [Internal =>] LOCAL_NAME + -- [, [External =>] EXTERNAL_SYMBOL] + -- [, [Size =>] EXTERNAL_SYMBOL]); + + -- EXTERNAL_SYMBOL ::= + -- IDENTIFIER + -- | static_string_EXPRESSION + + when Pragma_Import_Object => Import_Object : declare + Args : Args_List (1 .. 3); + Names : constant Name_List (1 .. 3) := ( + Name_Internal, + Name_External, + Name_Size); + + Internal : Node_Id renames Args (1); + External : Node_Id renames Args (2); + Size : Node_Id renames Args (3); + + begin + GNAT_Pragma; + Gather_Associations (Names, Args); + Process_Extended_Import_Export_Object_Pragma ( + Arg_Internal => Internal, + Arg_External => External, + Arg_Size => Size); + end Import_Object; + + ---------------------- + -- Import_Procedure -- + ---------------------- + + -- pragma Import_Procedure ( + -- [Internal =>] LOCAL_NAME + -- [, [External =>] EXTERNAL_SYMBOL] + -- [, [Parameter_Types =>] (PARAMETER_TYPES)] + -- [, [Mechanism =>] MECHANISM] + -- [, [First_Optional_Parameter =>] IDENTIFIER]); + + -- EXTERNAL_SYMBOL ::= + -- IDENTIFIER + -- | static_string_EXPRESSION + + -- PARAMETER_TYPES ::= + -- null + -- | TYPE_DESIGNATOR @{, TYPE_DESIGNATOR@} + + -- TYPE_DESIGNATOR ::= + -- subtype_NAME + -- | subtype_Name ' Access + + -- MECHANISM ::= + -- MECHANISM_NAME + -- | (MECHANISM_ASSOCIATION @{, MECHANISM_ASSOCIATION@}) + + -- MECHANISM_ASSOCIATION ::= + -- [formal_parameter_NAME =>] MECHANISM_NAME + + -- MECHANISM_NAME ::= + -- Value + -- | Reference + -- | Descriptor [([Class =>] CLASS_NAME)] + + -- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca + + when Pragma_Import_Procedure => Import_Procedure : declare + Args : Args_List (1 .. 5); + Names : constant Name_List (1 .. 5) := ( + Name_Internal, + Name_External, + Name_Parameter_Types, + Name_Mechanism, + Name_First_Optional_Parameter); + + Internal : Node_Id renames Args (1); + External : Node_Id renames Args (2); + Parameter_Types : Node_Id renames Args (3); + Mechanism : Node_Id renames Args (4); + First_Optional_Parameter : Node_Id renames Args (5); + + begin + GNAT_Pragma; + Gather_Associations (Names, Args); + Process_Extended_Import_Export_Subprogram_Pragma ( + Arg_Internal => Internal, + Arg_External => External, + Arg_Parameter_Types => Parameter_Types, + Arg_Mechanism => Mechanism, + Arg_First_Optional_Parameter => First_Optional_Parameter); + end Import_Procedure; + + ----------------------------- + -- Import_Valued_Procedure -- + ----------------------------- + + -- pragma Import_Valued_Procedure ( + -- [Internal =>] LOCAL_NAME + -- [, [External =>] EXTERNAL_SYMBOL] + -- [, [Parameter_Types =>] (PARAMETER_TYPES)] + -- [, [Mechanism =>] MECHANISM] + -- [, [First_Optional_Parameter =>] IDENTIFIER]); + + -- EXTERNAL_SYMBOL ::= + -- IDENTIFIER + -- | static_string_EXPRESSION + + -- PARAMETER_TYPES ::= + -- null + -- | TYPE_DESIGNATOR @{, TYPE_DESIGNATOR@} + + -- TYPE_DESIGNATOR ::= + -- subtype_NAME + -- | subtype_Name ' Access + + -- MECHANISM ::= + -- MECHANISM_NAME + -- | (MECHANISM_ASSOCIATION @{, MECHANISM_ASSOCIATION@}) + + -- MECHANISM_ASSOCIATION ::= + -- [formal_parameter_NAME =>] MECHANISM_NAME + + -- MECHANISM_NAME ::= + -- Value + -- | Reference + -- | Descriptor [([Class =>] CLASS_NAME)] + + -- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca + + when Pragma_Import_Valued_Procedure => + Import_Valued_Procedure : declare + Args : Args_List (1 .. 5); + Names : constant Name_List (1 .. 5) := ( + Name_Internal, + Name_External, + Name_Parameter_Types, + Name_Mechanism, + Name_First_Optional_Parameter); + + Internal : Node_Id renames Args (1); + External : Node_Id renames Args (2); + Parameter_Types : Node_Id renames Args (3); + Mechanism : Node_Id renames Args (4); + First_Optional_Parameter : Node_Id renames Args (5); + + begin + GNAT_Pragma; + Gather_Associations (Names, Args); + Process_Extended_Import_Export_Subprogram_Pragma ( + Arg_Internal => Internal, + Arg_External => External, + Arg_Parameter_Types => Parameter_Types, + Arg_Mechanism => Mechanism, + Arg_First_Optional_Parameter => First_Optional_Parameter); + end Import_Valued_Procedure; + + ------------------------ + -- Initialize_Scalars -- + ------------------------ + + -- pragma Initialize_Scalars; + + when Pragma_Initialize_Scalars => + GNAT_Pragma; + Check_Arg_Count (0); + Check_Valid_Configuration_Pragma; + Check_Restriction (No_Initialize_Scalars, N); + + if not Restriction_Active (No_Initialize_Scalars) then + Init_Or_Norm_Scalars := True; + Initialize_Scalars := True; + end if; + + ------------ + -- Inline -- + ------------ + + -- pragma Inline ( NAME {, NAME} ); + + when Pragma_Inline => + + -- Pragma is active if inlining option is active + + Process_Inline (Inline_Active); + + ------------------- + -- Inline_Always -- + ------------------- + + -- pragma Inline_Always ( NAME {, NAME} ); + + when Pragma_Inline_Always => + GNAT_Pragma; + Process_Inline (True); + + -------------------- + -- Inline_Generic -- + -------------------- + + -- pragma Inline_Generic (NAME {, NAME}); + + when Pragma_Inline_Generic => + GNAT_Pragma; + Process_Generic_List; + + ---------------------- + -- Inspection_Point -- + ---------------------- + + -- pragma Inspection_Point [(object_NAME {, object_NAME})]; + + when Pragma_Inspection_Point => Inspection_Point : declare + Arg : Node_Id; + Exp : Node_Id; + + begin + if Arg_Count > 0 then + Arg := Arg1; + loop + Exp := Expression (Arg); + Analyze (Exp); + + if not Is_Entity_Name (Exp) + or else not Is_Object (Entity (Exp)) + then + Error_Pragma_Arg ("object name required", Arg); + end if; + + Next (Arg); + exit when No (Arg); + end loop; + end if; + end Inspection_Point; + + --------------- + -- Interface -- + --------------- + + -- pragma Interface ( + -- [ Convention =>] convention_IDENTIFIER, + -- [ Entity =>] local_NAME + -- [, [External_Name =>] static_string_EXPRESSION ] + -- [, [Link_Name =>] static_string_EXPRESSION ]); + + when Pragma_Interface => + GNAT_Pragma; + Check_Arg_Order + ((Name_Convention, + Name_Entity, + Name_External_Name, + Name_Link_Name)); + Check_At_Least_N_Arguments (2); + Check_At_Most_N_Arguments (4); + Process_Import_Or_Interface; + + -------------------- + -- Interface_Name -- + -------------------- + + -- pragma Interface_Name ( + -- [ Entity =>] local_NAME + -- [,[External_Name =>] static_string_EXPRESSION ] + -- [,[Link_Name =>] static_string_EXPRESSION ]); + + when Pragma_Interface_Name => Interface_Name : declare + Id : Node_Id; + Def_Id : Entity_Id; + Hom_Id : Entity_Id; + Found : Boolean; + + begin + GNAT_Pragma; + Check_Arg_Order + ((Name_Entity, Name_External_Name, Name_Link_Name)); + Check_At_Least_N_Arguments (2); + Check_At_Most_N_Arguments (3); + Id := Expression (Arg1); + Analyze (Id); + + if not Is_Entity_Name (Id) then + Error_Pragma_Arg + ("first argument for pragma% must be entity name", Arg1); + elsif Etype (Id) = Any_Type then + return; + else + Def_Id := Entity (Id); + end if; + + -- Special DEC-compatible processing for the object case, forces + -- object to be imported. + + if Ekind (Def_Id) = E_Variable then + Kill_Size_Check_Code (Def_Id); + Note_Possible_Modification (Id, Sure => False); + + -- Initialization is not allowed for imported variable + + if Present (Expression (Parent (Def_Id))) + and then Comes_From_Source (Expression (Parent (Def_Id))) + then + Error_Msg_Sloc := Sloc (Def_Id); + Error_Pragma_Arg + ("no initialization allowed for declaration of& #", + Arg2); + + else + -- For compatibility, support VADS usage of providing both + -- pragmas Interface and Interface_Name to obtain the effect + -- of a single Import pragma. + + if Is_Imported (Def_Id) + and then Present (First_Rep_Item (Def_Id)) + and then Nkind (First_Rep_Item (Def_Id)) = N_Pragma + and then + Pragma_Name (First_Rep_Item (Def_Id)) = Name_Interface + then + null; + else + Set_Imported (Def_Id); + end if; + + Set_Is_Public (Def_Id); + Process_Interface_Name (Def_Id, Arg2, Arg3); + end if; + + -- Otherwise must be subprogram + + elsif not Is_Subprogram (Def_Id) then + Error_Pragma_Arg + ("argument of pragma% is not subprogram", Arg1); + + else + Check_At_Most_N_Arguments (3); + Hom_Id := Def_Id; + Found := False; + + -- Loop through homonyms + + loop + Def_Id := Get_Base_Subprogram (Hom_Id); + + if Is_Imported (Def_Id) then + Process_Interface_Name (Def_Id, Arg2, Arg3); + Found := True; + end if; + + Hom_Id := Homonym (Hom_Id); + + exit when No (Hom_Id) + or else Scope (Hom_Id) /= Current_Scope; + end loop; + + if not Found then + Error_Pragma_Arg + ("argument of pragma% is not imported subprogram", + Arg1); + end if; + end if; + end Interface_Name; + + ----------------------- + -- Interrupt_Handler -- + ----------------------- + + -- pragma Interrupt_Handler (handler_NAME); + + when Pragma_Interrupt_Handler => + Check_Ada_83_Warning; + Check_Arg_Count (1); + Check_No_Identifiers; + + if No_Run_Time_Mode then + Error_Msg_CRT ("Interrupt_Handler pragma", N); + else + Check_Interrupt_Or_Attach_Handler; + Process_Interrupt_Or_Attach_Handler; + end if; + + ------------------------ + -- Interrupt_Priority -- + ------------------------ + + -- pragma Interrupt_Priority [(EXPRESSION)]; + + when Pragma_Interrupt_Priority => Interrupt_Priority : declare + P : constant Node_Id := Parent (N); + Arg : Node_Id; + + begin + Check_Ada_83_Warning; + + if Arg_Count /= 0 then + Arg := Expression (Arg1); + Check_Arg_Count (1); + Check_No_Identifiers; + + -- The expression must be analyzed in the special manner + -- described in "Handling of Default and Per-Object + -- Expressions" in sem.ads. + + Preanalyze_Spec_Expression (Arg, RTE (RE_Interrupt_Priority)); + end if; + + if Nkind (P) /= N_Task_Definition + and then Nkind (P) /= N_Protected_Definition + then + Pragma_Misplaced; + return; + + elsif Has_Priority_Pragma (P) then + Error_Pragma ("duplicate pragma% not allowed"); + + else + Set_Has_Priority_Pragma (P, True); + Record_Rep_Item (Defining_Identifier (Parent (P)), N); + end if; + end Interrupt_Priority; + + --------------------- + -- Interrupt_State -- + --------------------- + + -- pragma Interrupt_State ( + -- [Name =>] INTERRUPT_ID, + -- [State =>] INTERRUPT_STATE); + + -- INTERRUPT_ID => IDENTIFIER | static_integer_EXPRESSION + -- INTERRUPT_STATE => System | Runtime | User + + -- Note: if the interrupt id is given as an identifier, then + -- it must be one of the identifiers in Ada.Interrupts.Names. + -- Otherwise it is given as a static integer expression which + -- must be in the range of Ada.Interrupts.Interrupt_ID. + + when Pragma_Interrupt_State => Interrupt_State : declare + + Int_Id : constant Entity_Id := RTE (RE_Interrupt_ID); + -- This is the entity Ada.Interrupts.Interrupt_ID; + + State_Type : Character; + -- Set to 's'/'r'/'u' for System/Runtime/User + + IST_Num : Pos; + -- Index to entry in Interrupt_States table + + Int_Val : Uint; + -- Value of interrupt + + Arg1X : constant Node_Id := Get_Pragma_Arg (Arg1); + -- The first argument to the pragma + + Int_Ent : Entity_Id; + -- Interrupt entity in Ada.Interrupts.Names + + begin + GNAT_Pragma; + Check_Arg_Order ((Name_Name, Name_State)); + Check_Arg_Count (2); + + Check_Optional_Identifier (Arg1, Name_Name); + Check_Optional_Identifier (Arg2, Name_State); + Check_Arg_Is_Identifier (Arg2); + + -- First argument is identifier + + if Nkind (Arg1X) = N_Identifier then + + -- Search list of names in Ada.Interrupts.Names + + Int_Ent := First_Entity (RTE (RE_Names)); + loop + if No (Int_Ent) then + Error_Pragma_Arg ("invalid interrupt name", Arg1); + + elsif Chars (Int_Ent) = Chars (Arg1X) then + Int_Val := Expr_Value (Constant_Value (Int_Ent)); + exit; + end if; + + Next_Entity (Int_Ent); + end loop; + + -- First argument is not an identifier, so it must be a + -- static expression of type Ada.Interrupts.Interrupt_ID. + + else + Check_Arg_Is_Static_Expression (Arg1, Any_Integer); + Int_Val := Expr_Value (Arg1X); + + if Int_Val < Expr_Value (Type_Low_Bound (Int_Id)) + or else + Int_Val > Expr_Value (Type_High_Bound (Int_Id)) + then + Error_Pragma_Arg + ("value not in range of type " & + """Ada.Interrupts.Interrupt_'I'D""", Arg1); + end if; + end if; + + -- Check OK state + + case Chars (Get_Pragma_Arg (Arg2)) is + when Name_Runtime => State_Type := 'r'; + when Name_System => State_Type := 's'; + when Name_User => State_Type := 'u'; + + when others => + Error_Pragma_Arg ("invalid interrupt state", Arg2); + end case; + + -- Check if entry is already stored + + IST_Num := Interrupt_States.First; + loop + -- If entry not found, add it + + if IST_Num > Interrupt_States.Last then + Interrupt_States.Append + ((Interrupt_Number => UI_To_Int (Int_Val), + Interrupt_State => State_Type, + Pragma_Loc => Loc)); + exit; + + -- Case of entry for the same entry + + elsif Int_Val = Interrupt_States.Table (IST_Num). + Interrupt_Number + then + -- If state matches, done, no need to make redundant entry + + exit when + State_Type = Interrupt_States.Table (IST_Num). + Interrupt_State; + + -- Otherwise if state does not match, error + + Error_Msg_Sloc := + Interrupt_States.Table (IST_Num).Pragma_Loc; + Error_Pragma_Arg + ("state conflicts with that given #", Arg2); + exit; + end if; + + IST_Num := IST_Num + 1; + end loop; + end Interrupt_State; + + ---------------------- + -- Java_Constructor -- + ---------------------- + + -- pragma Java_Constructor ([Entity =>] LOCAL_NAME); + + -- Also handles pragma CIL_Constructor + + when Pragma_CIL_Constructor | Pragma_Java_Constructor => + Java_Constructor : declare + Id : Entity_Id; + Def_Id : Entity_Id; + Hom_Id : Entity_Id; + Convention : Convention_Id; + + begin + GNAT_Pragma; + Check_Arg_Count (1); + Check_Optional_Identifier (Arg1, Name_Entity); + Check_Arg_Is_Local_Name (Arg1); + + Id := Expression (Arg1); + Find_Program_Unit_Name (Id); + + -- If we did not find the name, we are done + + if Etype (Id) = Any_Type then + return; + end if; + + case Prag_Id is + when Pragma_CIL_Constructor => Convention := Convention_CIL; + when Pragma_Java_Constructor => Convention := Convention_Java; + when others => null; + end case; + + Hom_Id := Entity (Id); + + -- Loop through homonyms + + loop + Def_Id := Get_Base_Subprogram (Hom_Id); + + -- The constructor is required to be a function returning an + -- access type whose designated type has convention Java/CIL. + + if Ekind (Def_Id) = E_Function + and then + (Is_Value_Type (Etype (Def_Id)) + or else + (Ekind (Etype (Def_Id)) in Access_Kind + and then + (Atree.Convention + (Designated_Type (Etype (Def_Id))) = Convention + or else + Atree.Convention + (Root_Type (Designated_Type (Etype (Def_Id)))) = + Convention))) + then + Set_Is_Constructor (Def_Id); + Set_Convention (Def_Id, Convention); + Set_Is_Imported (Def_Id); + + else + if Convention = Convention_Java then + Error_Pragma_Arg + ("pragma% requires function returning a " & + "'Java access type", Arg1); + else + pragma Assert (Convention = Convention_CIL); + Error_Pragma_Arg + ("pragma% requires function returning a " & + "'CIL access type", Arg1); + end if; + end if; + + Hom_Id := Homonym (Hom_Id); + + exit when No (Hom_Id) or else Scope (Hom_Id) /= Current_Scope; + end loop; + end Java_Constructor; + + ---------------------- + -- Java_Interface -- + ---------------------- + + -- pragma Java_Interface ([Entity =>] LOCAL_NAME); + + when Pragma_Java_Interface => Java_Interface : declare + Arg : Node_Id; + Typ : Entity_Id; + + begin + GNAT_Pragma; + Check_Arg_Count (1); + Check_Optional_Identifier (Arg1, Name_Entity); + Check_Arg_Is_Local_Name (Arg1); + + Arg := Expression (Arg1); + Analyze (Arg); + + if Etype (Arg) = Any_Type then + return; + end if; + + if not Is_Entity_Name (Arg) + or else not Is_Type (Entity (Arg)) + then + Error_Pragma_Arg ("pragma% requires a type mark", Arg1); + end if; + + Typ := Underlying_Type (Entity (Arg)); + + -- For now we simply check some of the semantic constraints + -- on the type. This currently leaves out some restrictions + -- on interface types, namely that the parent type must be + -- java.lang.Object.Typ and that all primitives of the type + -- should be declared abstract. ??? + + if not Is_Tagged_Type (Typ) or else not Is_Abstract_Type (Typ) then + Error_Pragma_Arg ("pragma% requires an abstract " + & "tagged type", Arg1); + + elsif not Has_Discriminants (Typ) + or else Ekind (Etype (First_Discriminant (Typ))) + /= E_Anonymous_Access_Type + or else + not Is_Class_Wide_Type + (Designated_Type (Etype (First_Discriminant (Typ)))) + then + Error_Pragma_Arg + ("type must have a class-wide access discriminant", Arg1); + end if; + end Java_Interface; + + ---------------- + -- Keep_Names -- + ---------------- + + -- pragma Keep_Names ([On => ] local_NAME); + + when Pragma_Keep_Names => Keep_Names : declare + Arg : Node_Id; + + begin + GNAT_Pragma; + Check_Arg_Count (1); + Check_Optional_Identifier (Arg1, Name_On); + Check_Arg_Is_Local_Name (Arg1); + + Arg := Expression (Arg1); + Analyze (Arg); + + if Etype (Arg) = Any_Type then + return; + end if; + + if not Is_Entity_Name (Arg) + or else Ekind (Entity (Arg)) /= E_Enumeration_Type + then + Error_Pragma_Arg + ("pragma% requires a local enumeration type", Arg1); + end if; + + Set_Discard_Names (Entity (Arg), False); + end Keep_Names; + + ------------- + -- License -- + ------------- + + -- pragma License (RESTRICTED | UNRESTRICTED | GPL | MODIFIED_GPL); + + when Pragma_License => + GNAT_Pragma; + Check_Arg_Count (1); + Check_No_Identifiers; + Check_Valid_Configuration_Pragma; + Check_Arg_Is_Identifier (Arg1); + + declare + Sind : constant Source_File_Index := + Source_Index (Current_Sem_Unit); + + begin + case Chars (Get_Pragma_Arg (Arg1)) is + when Name_GPL => + Set_License (Sind, GPL); + + when Name_Modified_GPL => + Set_License (Sind, Modified_GPL); + + when Name_Restricted => + Set_License (Sind, Restricted); + + when Name_Unrestricted => + Set_License (Sind, Unrestricted); + + when others => + Error_Pragma_Arg ("invalid license name", Arg1); + end case; + end; + + --------------- + -- Link_With -- + --------------- + + -- pragma Link_With (string_EXPRESSION {, string_EXPRESSION}); + + when Pragma_Link_With => Link_With : declare + Arg : Node_Id; + + begin + GNAT_Pragma; + + if Operating_Mode = Generate_Code + and then In_Extended_Main_Source_Unit (N) + then + Check_At_Least_N_Arguments (1); + Check_No_Identifiers; + Check_Is_In_Decl_Part_Or_Package_Spec; + Check_Arg_Is_Static_Expression (Arg1, Standard_String); + Start_String; + + Arg := Arg1; + while Present (Arg) loop + Check_Arg_Is_Static_Expression (Arg, Standard_String); + + -- Store argument, converting sequences of spaces + -- to a single null character (this is one of the + -- differences in processing between Link_With + -- and Linker_Options). + + Arg_Store : declare + C : constant Char_Code := Get_Char_Code (' '); + S : constant String_Id := + Strval (Expr_Value_S (Expression (Arg))); + L : constant Nat := String_Length (S); + F : Nat := 1; + + procedure Skip_Spaces; + -- Advance F past any spaces + + ----------------- + -- Skip_Spaces -- + ----------------- + + procedure Skip_Spaces is + begin + while F <= L and then Get_String_Char (S, F) = C loop + F := F + 1; + end loop; + end Skip_Spaces; + + -- Start of processing for Arg_Store + + begin + Skip_Spaces; -- skip leading spaces + + -- Loop through characters, changing any embedded + -- sequence of spaces to a single null character + -- (this is how Link_With/Linker_Options differ) + + while F <= L loop + if Get_String_Char (S, F) = C then + Skip_Spaces; + exit when F > L; + Store_String_Char (ASCII.NUL); + + else + Store_String_Char (Get_String_Char (S, F)); + F := F + 1; + end if; + end loop; + end Arg_Store; + + Arg := Next (Arg); + + if Present (Arg) then + Store_String_Char (ASCII.NUL); + end if; + end loop; + + Store_Linker_Option_String (End_String); + end if; + end Link_With; + + ------------------ + -- Linker_Alias -- + ------------------ + + -- pragma Linker_Alias ( + -- [Entity =>] LOCAL_NAME + -- [Target =>] static_string_EXPRESSION); + + when Pragma_Linker_Alias => + GNAT_Pragma; + Check_Arg_Order ((Name_Entity, Name_Target)); + Check_Arg_Count (2); + Check_Optional_Identifier (Arg1, Name_Entity); + Check_Optional_Identifier (Arg2, Name_Target); + Check_Arg_Is_Library_Level_Local_Name (Arg1); + Check_Arg_Is_Static_Expression (Arg2, Standard_String); + + -- The only processing required is to link this item on to the + -- list of rep items for the given entity. This is accomplished + -- by the call to Rep_Item_Too_Late (when no error is detected + -- and False is returned). + + if Rep_Item_Too_Late (Entity (Expression (Arg1)), N) then + return; + else + Set_Has_Gigi_Rep_Item (Entity (Expression (Arg1))); + end if; + + ------------------------ + -- Linker_Constructor -- + ------------------------ + + -- pragma Linker_Constructor (procedure_LOCAL_NAME); + + -- Code is shared with Linker_Destructor + + ----------------------- + -- Linker_Destructor -- + ----------------------- + + -- pragma Linker_Destructor (procedure_LOCAL_NAME); + + when Pragma_Linker_Constructor | + Pragma_Linker_Destructor => + Linker_Constructor : declare + Arg1_X : Node_Id; + Proc : Entity_Id; + + begin + GNAT_Pragma; + Check_Arg_Count (1); + Check_No_Identifiers; + Check_Arg_Is_Local_Name (Arg1); + Arg1_X := Expression (Arg1); + Analyze (Arg1_X); + Proc := Find_Unique_Parameterless_Procedure (Arg1_X, Arg1); + + if not Is_Library_Level_Entity (Proc) then + Error_Pragma_Arg + ("argument for pragma% must be library level entity", Arg1); + end if; + + -- The only processing required is to link this item on to the + -- list of rep items for the given entity. This is accomplished + -- by the call to Rep_Item_Too_Late (when no error is detected + -- and False is returned). + + if Rep_Item_Too_Late (Proc, N) then + return; + else + Set_Has_Gigi_Rep_Item (Proc); + end if; + end Linker_Constructor; + + -------------------- + -- Linker_Options -- + -------------------- + + -- pragma Linker_Options (string_EXPRESSION {, string_EXPRESSION}); + + when Pragma_Linker_Options => Linker_Options : declare + Arg : Node_Id; + + begin + Check_Ada_83_Warning; + Check_No_Identifiers; + Check_Arg_Count (1); + Check_Is_In_Decl_Part_Or_Package_Spec; + Check_Arg_Is_Static_Expression (Arg1, Standard_String); + Start_String (Strval (Expr_Value_S (Expression (Arg1)))); + + Arg := Arg2; + while Present (Arg) loop + Check_Arg_Is_Static_Expression (Arg, Standard_String); + Store_String_Char (ASCII.NUL); + Store_String_Chars (Strval (Expr_Value_S (Expression (Arg)))); + Arg := Next (Arg); + end loop; + + if Operating_Mode = Generate_Code + and then In_Extended_Main_Source_Unit (N) + then + Store_Linker_Option_String (End_String); + end if; + end Linker_Options; + + -------------------- + -- Linker_Section -- + -------------------- + + -- pragma Linker_Section ( + -- [Entity =>] LOCAL_NAME + -- [Section =>] static_string_EXPRESSION); + + when Pragma_Linker_Section => + GNAT_Pragma; + Check_Arg_Order ((Name_Entity, Name_Section)); + Check_Arg_Count (2); + Check_Optional_Identifier (Arg1, Name_Entity); + Check_Optional_Identifier (Arg2, Name_Section); + Check_Arg_Is_Library_Level_Local_Name (Arg1); + Check_Arg_Is_Static_Expression (Arg2, Standard_String); + + -- This pragma applies only to objects + + if not Is_Object (Entity (Expression (Arg1))) then + Error_Pragma_Arg ("pragma% applies only to objects", Arg1); + end if; + + -- The only processing required is to link this item on to the + -- list of rep items for the given entity. This is accomplished + -- by the call to Rep_Item_Too_Late (when no error is detected + -- and False is returned). + + if Rep_Item_Too_Late (Entity (Expression (Arg1)), N) then + return; + else + Set_Has_Gigi_Rep_Item (Entity (Expression (Arg1))); + end if; + + ---------- + -- List -- + ---------- + + -- pragma List (On | Off) + + -- There is nothing to do here, since we did all the processing + -- for this pragma in Par.Prag (so that it works properly even in + -- syntax only mode) + + when Pragma_List => + null; + + -------------------- + -- Locking_Policy -- + -------------------- + + -- pragma Locking_Policy (policy_IDENTIFIER); + + when Pragma_Locking_Policy => declare + LP : Character; + + begin + Check_Ada_83_Warning; + Check_Arg_Count (1); + Check_No_Identifiers; + Check_Arg_Is_Locking_Policy (Arg1); + Check_Valid_Configuration_Pragma; + Get_Name_String (Chars (Expression (Arg1))); + LP := Fold_Upper (Name_Buffer (1)); + + if Locking_Policy /= ' ' + and then Locking_Policy /= LP + then + Error_Msg_Sloc := Locking_Policy_Sloc; + Error_Pragma ("locking policy incompatible with policy#"); + + -- Set new policy, but always preserve System_Location since + -- we like the error message with the run time name. + + else + Locking_Policy := LP; + + if Locking_Policy_Sloc /= System_Location then + Locking_Policy_Sloc := Loc; + end if; + end if; + end; + + ---------------- + -- Long_Float -- + ---------------- + + -- pragma Long_Float (D_Float | G_Float); + + when Pragma_Long_Float => + GNAT_Pragma; + Check_Valid_Configuration_Pragma; + Check_Arg_Count (1); + Check_No_Identifier (Arg1); + Check_Arg_Is_One_Of (Arg1, Name_D_Float, Name_G_Float); + + if not OpenVMS_On_Target then + Error_Pragma ("?pragma% ignored (applies only to Open'V'M'S)"); + end if; + + -- D_Float case + + if Chars (Expression (Arg1)) = Name_D_Float then + if Opt.Float_Format_Long = 'G' then + Error_Pragma ("G_Float previously specified"); + end if; + + Opt.Float_Format_Long := 'D'; + + -- G_Float case (this is the default, does not need overriding) + + else + if Opt.Float_Format_Long = 'D' then + Error_Pragma ("D_Float previously specified"); + end if; + + Opt.Float_Format_Long := 'G'; + end if; + + Set_Standard_Fpt_Formats; + + ----------------------- + -- Machine_Attribute -- + ----------------------- + + -- pragma Machine_Attribute ( + -- [Entity =>] LOCAL_NAME, + -- [Attribute_Name =>] static_string_EXPRESSION + -- [, [Info =>] static_string_EXPRESSION] ); + + when Pragma_Machine_Attribute => Machine_Attribute : declare + Def_Id : Entity_Id; + + begin + GNAT_Pragma; + Check_Arg_Order ((Name_Entity, Name_Attribute_Name, Name_Info)); + + if Arg_Count = 3 then + Check_Optional_Identifier (Arg3, Name_Info); + Check_Arg_Is_Static_Expression (Arg3, Standard_String); + else + Check_Arg_Count (2); + end if; + + Check_Optional_Identifier (Arg1, Name_Entity); + Check_Optional_Identifier (Arg2, Name_Attribute_Name); + Check_Arg_Is_Local_Name (Arg1); + Check_Arg_Is_Static_Expression (Arg2, Standard_String); + Def_Id := Entity (Expression (Arg1)); + + if Is_Access_Type (Def_Id) then + Def_Id := Designated_Type (Def_Id); + end if; + + if Rep_Item_Too_Early (Def_Id, N) then + return; + end if; + + Def_Id := Underlying_Type (Def_Id); + + -- The only processing required is to link this item on to the + -- list of rep items for the given entity. This is accomplished + -- by the call to Rep_Item_Too_Late (when no error is detected + -- and False is returned). + + if Rep_Item_Too_Late (Def_Id, N) then + return; + else + Set_Has_Gigi_Rep_Item (Entity (Expression (Arg1))); + end if; + end Machine_Attribute; + + ---------- + -- Main -- + ---------- + + -- pragma Main + -- (MAIN_OPTION [, MAIN_OPTION]); + + -- MAIN_OPTION ::= + -- [STACK_SIZE =>] static_integer_EXPRESSION + -- | [TASK_STACK_SIZE_DEFAULT =>] static_integer_EXPRESSION + -- | [TIME_SLICING_ENABLED =>] static_boolean_EXPRESSION + + when Pragma_Main => Main : declare + Args : Args_List (1 .. 3); + Names : constant Name_List (1 .. 3) := ( + Name_Stack_Size, + Name_Task_Stack_Size_Default, + Name_Time_Slicing_Enabled); + + Nod : Node_Id; + + begin + GNAT_Pragma; + Gather_Associations (Names, Args); + + for J in 1 .. 2 loop + if Present (Args (J)) then + Check_Arg_Is_Static_Expression (Args (J), Any_Integer); + end if; + end loop; + + if Present (Args (3)) then + Check_Arg_Is_Static_Expression (Args (3), Standard_Boolean); + end if; + + Nod := Next (N); + while Present (Nod) loop + if Nkind (Nod) = N_Pragma + and then Pragma_Name (Nod) = Name_Main + then + Error_Msg_Name_1 := Pname; + Error_Msg_N ("duplicate pragma% not permitted", Nod); + end if; + + Next (Nod); + end loop; + end Main; + + ------------------ + -- Main_Storage -- + ------------------ + + -- pragma Main_Storage + -- (MAIN_STORAGE_OPTION [, MAIN_STORAGE_OPTION]); + + -- MAIN_STORAGE_OPTION ::= + -- [WORKING_STORAGE =>] static_SIMPLE_EXPRESSION + -- | [TOP_GUARD =>] static_SIMPLE_EXPRESSION + + when Pragma_Main_Storage => Main_Storage : declare + Args : Args_List (1 .. 2); + Names : constant Name_List (1 .. 2) := ( + Name_Working_Storage, + Name_Top_Guard); + + Nod : Node_Id; + + begin + GNAT_Pragma; + Gather_Associations (Names, Args); + + for J in 1 .. 2 loop + if Present (Args (J)) then + Check_Arg_Is_Static_Expression (Args (J), Any_Integer); + end if; + end loop; + + Check_In_Main_Program; + + Nod := Next (N); + while Present (Nod) loop + if Nkind (Nod) = N_Pragma + and then Pragma_Name (Nod) = Name_Main_Storage + then + Error_Msg_Name_1 := Pname; + Error_Msg_N ("duplicate pragma% not permitted", Nod); + end if; + + Next (Nod); + end loop; + end Main_Storage; + + ----------------- + -- Memory_Size -- + ----------------- + + -- pragma Memory_Size (NUMERIC_LITERAL) + + when Pragma_Memory_Size => + GNAT_Pragma; + + -- Memory size is simply ignored + + Check_No_Identifiers; + Check_Arg_Count (1); + Check_Arg_Is_Integer_Literal (Arg1); + + ------------- + -- No_Body -- + ------------- + + -- pragma No_Body; + + -- The only correct use of this pragma is on its own in a file, in + -- which case it is specially processed (see Gnat1drv.Check_Bad_Body + -- and Frontend, which use Sinput.L.Source_File_Is_Pragma_No_Body to + -- check for a file containing nothing but a No_Body pragma). If we + -- attempt to process it during normal semantics processing, it means + -- it was misplaced. + + when Pragma_No_Body => + GNAT_Pragma; + Pragma_Misplaced; + + --------------- + -- No_Return -- + --------------- + + -- pragma No_Return (procedure_LOCAL_NAME {, procedure_Local_Name}); + + when Pragma_No_Return => No_Return : declare + Id : Node_Id; + E : Entity_Id; + Found : Boolean; + Arg : Node_Id; + + begin + GNAT_Pragma; + Check_At_Least_N_Arguments (1); + + -- Loop through arguments of pragma + + Arg := Arg1; + while Present (Arg) loop + Check_Arg_Is_Local_Name (Arg); + Id := Expression (Arg); + Analyze (Id); + + if not Is_Entity_Name (Id) then + Error_Pragma_Arg ("entity name required", Arg); + end if; + + if Etype (Id) = Any_Type then + raise Pragma_Exit; + end if; + + -- Loop to find matching procedures + + E := Entity (Id); + Found := False; + while Present (E) + and then Scope (E) = Current_Scope + loop + if Ekind (E) = E_Procedure + or else Ekind (E) = E_Generic_Procedure + then + Set_No_Return (E); + + -- Set flag on any alias as well + + if Is_Overloadable (E) and then Present (Alias (E)) then + Set_No_Return (Alias (E)); + end if; + + Found := True; + end if; + + E := Homonym (E); + end loop; + + if not Found then + Error_Pragma_Arg ("no procedure & found for pragma%", Arg); + end if; + + Next (Arg); + end loop; + end No_Return; + + ----------------- + -- No_Run_Time -- + ----------------- + + -- pragma No_Run_Time; + + -- Note: this pragma is retained for backwards compatibility. + -- See body of Rtsfind for full details on its handling. + + when Pragma_No_Run_Time => + GNAT_Pragma; + Check_Valid_Configuration_Pragma; + Check_Arg_Count (0); + + No_Run_Time_Mode := True; + Configurable_Run_Time_Mode := True; + + -- Set Duration to 32 bits if word size is 32 + + if Ttypes.System_Word_Size = 32 then + Duration_32_Bits_On_Target := True; + end if; + + -- Set appropriate restrictions + + Set_Restriction (No_Finalization, N); + Set_Restriction (No_Exception_Handlers, N); + Set_Restriction (Max_Tasks, N, 0); + Set_Restriction (No_Tasking, N); + + ------------------------ + -- No_Strict_Aliasing -- + ------------------------ + + -- pragma No_Strict_Aliasing [([Entity =>] type_LOCAL_NAME)]; + + when Pragma_No_Strict_Aliasing => No_Strict_Aliasing : declare + E_Id : Entity_Id; + + begin + GNAT_Pragma; + Check_At_Most_N_Arguments (1); + + if Arg_Count = 0 then + Check_Valid_Configuration_Pragma; + Opt.No_Strict_Aliasing := True; + + else + Check_Optional_Identifier (Arg2, Name_Entity); + Check_Arg_Is_Local_Name (Arg1); + E_Id := Entity (Expression (Arg1)); + + if E_Id = Any_Type then + return; + elsif No (E_Id) or else not Is_Access_Type (E_Id) then + Error_Pragma_Arg ("pragma% requires access type", Arg1); + end if; + + Set_No_Strict_Aliasing (Implementation_Base_Type (E_Id)); + end if; + end No_Strict_Aliasing; + + ----------------------- + -- Normalize_Scalars -- + ----------------------- + + -- pragma Normalize_Scalars; + + when Pragma_Normalize_Scalars => + Check_Ada_83_Warning; + Check_Arg_Count (0); + Check_Valid_Configuration_Pragma; + Normalize_Scalars := True; + Init_Or_Norm_Scalars := True; + + ----------------- + -- Obsolescent -- + ----------------- + + -- pragma Obsolescent [( + -- [Entity => NAME,] + -- [(static_string_EXPRESSION [, Ada_05])]; + + when Pragma_Obsolescent => Obsolescent : declare + Ename : Node_Id; + Decl : Node_Id; + + procedure Set_Obsolescent (E : Entity_Id); + -- Given an entity Ent, mark it as obsolescent if appropriate + + --------------------- + -- Set_Obsolescent -- + --------------------- + + procedure Set_Obsolescent (E : Entity_Id) is + Active : Boolean; + Ent : Entity_Id; + S : String_Id; + + begin + Active := True; + Ent := E; + + -- Entity name was given + + if Present (Ename) then + + -- If entity name matches, we are fine + -- Save entity in pragma argument, for ASIS use. + + if Chars (Ename) = Chars (Ent) then + Set_Entity (Ename, Ent); + Generate_Reference (Ent, Ename); + + -- If entity name does not match, only possibility is an + -- enumeration literal from an enumeration type declaration. + + elsif Ekind (Ent) /= E_Enumeration_Type then + Error_Pragma + ("pragma % entity name does not match declaration"); + + else + Ent := First_Literal (E); + loop + if No (Ent) then + Error_Pragma + ("pragma % entity name does not match any " & + "enumeration literal"); + + elsif Chars (Ent) = Chars (Ename) then + Set_Entity (Ename, Ent); + Generate_Reference (Ent, Ename); + exit; + + else + Ent := Next_Literal (Ent); + end if; + end loop; + end if; + end if; + + -- Ent points to entity to be marked + + if Arg_Count >= 1 then + + -- Deal with static string argument + + Check_Arg_Is_Static_Expression (Arg1, Standard_String); + S := Strval (Expression (Arg1)); + + for J in 1 .. String_Length (S) loop + if not In_Character_Range (Get_String_Char (S, J)) then + Error_Pragma_Arg + ("pragma% argument does not allow wide characters", + Arg1); + end if; + end loop; + + Obsolescent_Warnings.Append + ((Ent => Ent, Msg => Strval (Expression (Arg1)))); + + -- Check for Ada_05 parameter + + if Arg_Count /= 1 then + Check_Arg_Count (2); + + declare + Argx : constant Node_Id := Get_Pragma_Arg (Arg2); + + begin + Check_Arg_Is_Identifier (Argx); + + if Chars (Argx) /= Name_Ada_05 then + Error_Msg_Name_2 := Name_Ada_05; + Error_Pragma_Arg + ("only allowed argument for pragma% is %", Argx); + end if; + + if Ada_Version_Explicit < Ada_05 + or else not Warn_On_Ada_2005_Compatibility + then + Active := False; + end if; + end; + end if; + end if; + + -- Set flag if pragma active + + if Active then + Set_Is_Obsolescent (Ent); + end if; + + return; + end Set_Obsolescent; + + -- Start of processing for pragma Obsolescent + + begin + GNAT_Pragma; + + Check_At_Most_N_Arguments (3); + + -- See if first argument specifies an entity name + + if Arg_Count >= 1 + and then Chars (Arg1) = Name_Entity + then + Ename := Get_Pragma_Arg (Arg1); + + if Nkind (Ename) /= N_Character_Literal + and then + Nkind (Ename) /= N_Identifier + and then + Nkind (Ename) /= N_Operator_Symbol + then + Error_Pragma_Arg ("entity name expected for pragma%", Arg1); + end if; + + -- Eliminate first argument, so we can share processing + + Arg1 := Arg2; + Arg2 := Arg3; + Arg_Count := Arg_Count - 1; + + -- No Entity name argument given + + else + Ename := Empty; + end if; + + Check_No_Identifiers; + + -- Get immediately preceding declaration + + Decl := Prev (N); + while Present (Decl) and then Nkind (Decl) = N_Pragma loop + Prev (Decl); + end loop; + + -- Cases where we do not follow anything other than another pragma + + if No (Decl) then + + -- First case: library level compilation unit declaration with + -- the pragma immediately following the declaration. + + if Nkind (Parent (N)) = N_Compilation_Unit_Aux then + Set_Obsolescent + (Defining_Entity (Unit (Parent (Parent (N))))); + return; + + -- Case 2: library unit placement for package + + else + declare + Ent : constant Entity_Id := Find_Lib_Unit_Name; + begin + if Is_Package_Or_Generic_Package (Ent) then + Set_Obsolescent (Ent); + return; + end if; + end; + end if; + + -- Cases where we must follow a declaration + + else + if Nkind (Decl) not in N_Declaration + and then Nkind (Decl) not in N_Later_Decl_Item + and then Nkind (Decl) not in N_Generic_Declaration + then + Error_Pragma + ("pragma% misplaced, " & + "must immediately follow a declaration"); + + else + Set_Obsolescent (Defining_Entity (Decl)); + return; + end if; + end if; + end Obsolescent; + + -------------- + -- Optimize -- + -------------- + + -- pragma Optimize (Time | Space | Off); + + -- The actual check for optimize is done in Gigi. Note that this + -- pragma does not actually change the optimization setting, it + -- simply checks that it is consistent with the pragma. + + when Pragma_Optimize => + Check_No_Identifiers; + Check_Arg_Count (1); + Check_Arg_Is_One_Of (Arg1, Name_Time, Name_Space, Name_Off); + + ------------------------ + -- Optimize_Alignment -- + ------------------------ + + -- pragma Optimize_Alignment (Time | Space | Off); + + when Pragma_Optimize_Alignment => + GNAT_Pragma; + Check_No_Identifiers; + Check_Arg_Count (1); + Check_Valid_Configuration_Pragma; + + declare + Nam : constant Name_Id := Chars (Get_Pragma_Arg (Arg1)); + begin + case Nam is + when Name_Time => + Opt.Optimize_Alignment := 'T'; + when Name_Space => + Opt.Optimize_Alignment := 'S'; + when Name_Off => + Opt.Optimize_Alignment := 'O'; + when others => + Error_Pragma_Arg ("invalid argument for pragma%", Arg1); + end case; + end; + + -- Set indication that mode is set locally. If we are in fact in a + -- configuration pragma file, this setting is harmless since the + -- switch will get reset anyway at the start of each unit. + + Optimize_Alignment_Local := True; + + ---------- + -- Pack -- + ---------- + + -- pragma Pack (first_subtype_LOCAL_NAME); + + when Pragma_Pack => Pack : declare + Assoc : constant Node_Id := Arg1; + Type_Id : Node_Id; + Typ : Entity_Id; + + begin + Check_No_Identifiers; + Check_Arg_Count (1); + Check_Arg_Is_Local_Name (Arg1); + + Type_Id := Expression (Assoc); + Find_Type (Type_Id); + Typ := Entity (Type_Id); + + if Typ = Any_Type + or else Rep_Item_Too_Early (Typ, N) + then + return; + else + Typ := Underlying_Type (Typ); + end if; + + if not Is_Array_Type (Typ) and then not Is_Record_Type (Typ) then + Error_Pragma ("pragma% must specify array or record type"); + end if; + + Check_First_Subtype (Arg1); + + if Has_Pragma_Pack (Typ) then + Error_Pragma ("duplicate pragma%, only one allowed"); + + -- Array type + + elsif Is_Array_Type (Typ) then + + -- Pack not allowed for aliased or atomic components + + if Has_Aliased_Components (Base_Type (Typ)) then + Error_Pragma + ("pragma% ignored, cannot pack aliased components?"); + + elsif Has_Atomic_Components (Typ) + or else Is_Atomic (Component_Type (Typ)) + then + Error_Pragma + ("?pragma% ignored, cannot pack atomic components"); + end if; + + -- If we had an explicit component size given, then we do not + -- let Pack override this given size. We also give a warning + -- that Pack is being ignored unless we can tell for sure that + -- the Pack would not have had any effect anyway. + + if Has_Component_Size_Clause (Typ) then + if Known_Static_RM_Size (Component_Type (Typ)) + and then + RM_Size (Component_Type (Typ)) = Component_Size (Typ) + then + null; + else + Error_Pragma + ("?pragma% ignored, explicit component size given"); + end if; + + -- If no prior array component size given, Pack is effective + + else + if not Rep_Item_Too_Late (Typ, N) then + if VM_Target = No_VM then + Set_Is_Packed (Base_Type (Typ)); + elsif not GNAT_Mode then + Error_Pragma + ("?pragma% ignored in this configuration"); + end if; + + Set_Has_Pragma_Pack (Base_Type (Typ)); + Set_Has_Non_Standard_Rep (Base_Type (Typ)); + end if; + end if; + + -- For record types, the pack is always effective + + else pragma Assert (Is_Record_Type (Typ)); + if not Rep_Item_Too_Late (Typ, N) then + if VM_Target = No_VM then + Set_Is_Packed (Base_Type (Typ)); + elsif not GNAT_Mode then + Error_Pragma ("?pragma% ignored in this configuration"); + end if; + + Set_Has_Pragma_Pack (Base_Type (Typ)); + Set_Has_Non_Standard_Rep (Base_Type (Typ)); + end if; + end if; + end Pack; + + ---------- + -- Page -- + ---------- + + -- pragma Page; + + -- There is nothing to do here, since we did all the processing + -- for this pragma in Par.Prag (so that it works properly even in + -- syntax only mode) + + when Pragma_Page => + null; + + ------------- + -- Passive -- + ------------- + + -- pragma Passive [(PASSIVE_FORM)]; + + -- PASSIVE_FORM ::= Semaphore | No + + when Pragma_Passive => + GNAT_Pragma; + + if Nkind (Parent (N)) /= N_Task_Definition then + Error_Pragma ("pragma% must be within task definition"); + end if; + + if Arg_Count /= 0 then + Check_Arg_Count (1); + Check_Arg_Is_One_Of (Arg1, Name_Semaphore, Name_No); + end if; + + ---------------------------------- + -- Preelaborable_Initialization -- + ---------------------------------- + + -- pragma Preelaborable_Initialization (DIRECT_NAME); + + when Pragma_Preelaborable_Initialization => Preelab_Init : declare + Ent : Entity_Id; + + begin + Ada_2005_Pragma; + Check_Arg_Count (1); + Check_No_Identifiers; + Check_Arg_Is_Identifier (Arg1); + Check_Arg_Is_Local_Name (Arg1); + Check_First_Subtype (Arg1); + Ent := Entity (Expression (Arg1)); + + if not Is_Private_Type (Ent) + and then not Is_Protected_Type (Ent) + then + Error_Pragma_Arg + ("pragma % can only be applied to private or protected type", + Arg1); + end if; + + -- Give an error if the pragma is applied to a protected type that + -- does not qualify (due to having entries, or due to components + -- that do not qualify). + + if Is_Protected_Type (Ent) + and then not Has_Preelaborable_Initialization (Ent) + then + Error_Msg_N + ("protected type & does not have preelaborable " & + "initialization", Ent); + + -- Otherwise mark the type as definitely having preelaborable + -- initialization. + + else + Set_Known_To_Have_Preelab_Init (Ent); + end if; + + if Has_Pragma_Preelab_Init (Ent) + and then Warn_On_Redundant_Constructs + then + Error_Pragma ("?duplicate pragma%!"); + else + Set_Has_Pragma_Preelab_Init (Ent); + end if; + end Preelab_Init; + + -------------------- + -- Persistent_BSS -- + -------------------- + + when Pragma_Persistent_BSS => Persistent_BSS : declare + Decl : Node_Id; + Ent : Entity_Id; + Prag : Node_Id; + + begin + GNAT_Pragma; + Check_At_Most_N_Arguments (1); + + -- Case of application to specific object (one argument) + + if Arg_Count = 1 then + Check_Arg_Is_Library_Level_Local_Name (Arg1); + + if not Is_Entity_Name (Expression (Arg1)) + or else + (Ekind (Entity (Expression (Arg1))) /= E_Variable + and then Ekind (Entity (Expression (Arg1))) /= E_Constant) + then + Error_Pragma_Arg ("pragma% only applies to objects", Arg1); + end if; + + Ent := Entity (Expression (Arg1)); + Decl := Parent (Ent); + + if Rep_Item_Too_Late (Ent, N) then + return; + end if; + + if Present (Expression (Decl)) then + Error_Pragma_Arg + ("object for pragma% cannot have initialization", Arg1); + end if; + + if not Is_Potentially_Persistent_Type (Etype (Ent)) then + Error_Pragma_Arg + ("object type for pragma% is not potentially persistent", + Arg1); + end if; + + Prag := + Make_Linker_Section_Pragma + (Ent, Sloc (N), ".persistent.bss"); + Insert_After (N, Prag); + Analyze (Prag); + + -- Case of use as configuration pragma with no arguments + + else + Check_Valid_Configuration_Pragma; + Persistent_BSS_Mode := True; + end if; + end Persistent_BSS; + + ------------- + -- Polling -- + ------------- + + -- pragma Polling (ON | OFF); + + when Pragma_Polling => + GNAT_Pragma; + Check_Arg_Count (1); + Check_No_Identifiers; + Check_Arg_Is_One_Of (Arg1, Name_On, Name_Off); + Polling_Required := (Chars (Expression (Arg1)) = Name_On); + + ------------------- + -- Postcondition -- + ------------------- + + -- pragma Postcondition ([Check =>] Boolean_Expression + -- [,[Message =>] String_Expression]); + + when Pragma_Postcondition => Postcondition : declare + In_Body : Boolean; + pragma Warnings (Off, In_Body); + + begin + GNAT_Pragma; + Check_At_Least_N_Arguments (1); + Check_At_Most_N_Arguments (2); + Check_Optional_Identifier (Arg1, Name_Check); + + -- All we need to do here is call the common check procedure, + -- the remainder of the processing is found in Sem_Ch6/Sem_Ch7. + + Check_Precondition_Postcondition (In_Body); + end Postcondition; + + ------------------ + -- Precondition -- + ------------------ + + -- pragma Precondition ([Check =>] Boolean_Expression + -- [,[Message =>] String_Expression]); + + when Pragma_Precondition => Precondition : declare + In_Body : Boolean; + + begin + GNAT_Pragma; + Check_At_Least_N_Arguments (1); + Check_At_Most_N_Arguments (2); + Check_Optional_Identifier (Arg1, Name_Check); + + Check_Precondition_Postcondition (In_Body); + + -- If in spec, nothing to do. If in body, then we convert the + -- pragma to pragma Check (Precondition, cond [, msg]). Note we + -- do this whether or not precondition checks are enabled. That + -- works fine since pragma Check will do this check. + + if In_Body then + if Arg_Count = 2 then + Check_Optional_Identifier (Arg3, Name_Message); + Analyze_And_Resolve (Get_Pragma_Arg (Arg2), Standard_String); + end if; + + Analyze_And_Resolve (Get_Pragma_Arg (Arg1), Standard_Boolean); + + Rewrite (N, + Make_Pragma (Loc, + Chars => Name_Check, + Pragma_Argument_Associations => New_List ( + Make_Pragma_Argument_Association (Loc, + Expression => + Make_Identifier (Loc, + Chars => Name_Precondition)), + + Make_Pragma_Argument_Association (Sloc (Arg1), + Expression => Relocate_Node (Get_Pragma_Arg (Arg1)))))); + + if Arg_Count = 2 then + Append_To (Pragma_Argument_Associations (N), + Make_Pragma_Argument_Association (Sloc (Arg2), + Expression => Relocate_Node (Get_Pragma_Arg (Arg2)))); + end if; + + Analyze (N); + end if; + end Precondition; + + ------------------ + -- Preelaborate -- + ------------------ + + -- pragma Preelaborate [(library_unit_NAME)]; + + -- Set the flag Is_Preelaborated of program unit name entity + + when Pragma_Preelaborate => Preelaborate : declare + Pa : constant Node_Id := Parent (N); + Pk : constant Node_Kind := Nkind (Pa); + Ent : Entity_Id; + + begin + Check_Ada_83_Warning; + Check_Valid_Library_Unit_Pragma; + + if Nkind (N) = N_Null_Statement then + return; + end if; + + Ent := Find_Lib_Unit_Name; + + -- This filters out pragmas inside generic parent then + -- show up inside instantiation + + if Present (Ent) + and then not (Pk = N_Package_Specification + and then Present (Generic_Parent (Pa))) + then + if not Debug_Flag_U then + Set_Is_Preelaborated (Ent); + Set_Suppress_Elaboration_Warnings (Ent); + end if; + end if; + end Preelaborate; + + --------------------- + -- Preelaborate_05 -- + --------------------- + + -- pragma Preelaborate_05 [(library_unit_NAME)]; + + -- This pragma is useable only in GNAT_Mode, where it is used like + -- pragma Preelaborate but it is only effective in Ada 2005 mode + -- (otherwise it is ignored). This is used to implement AI-362 which + -- recategorizes some run-time packages in Ada 2005 mode. + + when Pragma_Preelaborate_05 => Preelaborate_05 : declare + Ent : Entity_Id; + + begin + GNAT_Pragma; + Check_Valid_Library_Unit_Pragma; + + if not GNAT_Mode then + Error_Pragma ("pragma% only available in GNAT mode"); + end if; + + if Nkind (N) = N_Null_Statement then + return; + end if; + + -- This is one of the few cases where we need to test the value of + -- Ada_Version_Explicit rather than Ada_Version (which is always + -- set to Ada_05 in a predefined unit), we need to know the + -- explicit version set to know if this pragma is active. + + if Ada_Version_Explicit >= Ada_05 then + Ent := Find_Lib_Unit_Name; + Set_Is_Preelaborated (Ent); + Set_Suppress_Elaboration_Warnings (Ent); + end if; + end Preelaborate_05; + + -------------- + -- Priority -- + -------------- + + -- pragma Priority (EXPRESSION); + + when Pragma_Priority => Priority : declare + P : constant Node_Id := Parent (N); + Arg : Node_Id; + + begin + Check_No_Identifiers; + Check_Arg_Count (1); + + -- Subprogram case + + if Nkind (P) = N_Subprogram_Body then + Check_In_Main_Program; + + Arg := Expression (Arg1); + Analyze_And_Resolve (Arg, Standard_Integer); + + -- Must be static + + if not Is_Static_Expression (Arg) then + Flag_Non_Static_Expr + ("main subprogram priority is not static!", Arg); + raise Pragma_Exit; + + -- If constraint error, then we already signalled an error + + elsif Raises_Constraint_Error (Arg) then + null; + + -- Otherwise check in range + + else + declare + Val : constant Uint := Expr_Value (Arg); + + begin + if Val < 0 + or else Val > Expr_Value (Expression + (Parent (RTE (RE_Max_Priority)))) + then + Error_Pragma_Arg + ("main subprogram priority is out of range", Arg1); + end if; + end; + end if; + + Set_Main_Priority + (Current_Sem_Unit, UI_To_Int (Expr_Value (Arg))); + + -- Load an arbitrary entity from System.Tasking to make sure + -- this package is implicitly with'ed, since we need to have + -- the tasking run-time active for the pragma Priority to have + -- any effect. + + declare + Discard : Entity_Id; + pragma Warnings (Off, Discard); + begin + Discard := RTE (RE_Task_List); + end; + + -- Task or Protected, must be of type Integer + + elsif Nkind (P) = N_Protected_Definition + or else + Nkind (P) = N_Task_Definition + then + Arg := Expression (Arg1); + + -- The expression must be analyzed in the special manner + -- described in "Handling of Default and Per-Object + -- Expressions" in sem.ads. + + Preanalyze_Spec_Expression (Arg, Standard_Integer); + + if not Is_Static_Expression (Arg) then + Check_Restriction (Static_Priorities, Arg); + end if; + + -- Anything else is incorrect + + else + Pragma_Misplaced; + end if; + + if Has_Priority_Pragma (P) then + Error_Pragma ("duplicate pragma% not allowed"); + else + Set_Has_Priority_Pragma (P, True); + + if Nkind (P) = N_Protected_Definition + or else + Nkind (P) = N_Task_Definition + then + Record_Rep_Item (Defining_Identifier (Parent (P)), N); + -- exp_ch9 should use this ??? + end if; + end if; + end Priority; + + ----------------------------------- + -- Priority_Specific_Dispatching -- + ----------------------------------- + + -- pragma Priority_Specific_Dispatching ( + -- policy_IDENTIFIER, + -- first_priority_EXPRESSION, + -- last_priority_EXPRESSION); + + when Pragma_Priority_Specific_Dispatching => + Priority_Specific_Dispatching : declare + Prio_Id : constant Entity_Id := RTE (RE_Any_Priority); + -- This is the entity System.Any_Priority; + + DP : Character; + Lower_Bound : Node_Id; + Upper_Bound : Node_Id; + Lower_Val : Uint; + Upper_Val : Uint; + + begin + Ada_2005_Pragma; + Check_Arg_Count (3); + Check_No_Identifiers; + Check_Arg_Is_Task_Dispatching_Policy (Arg1); + Check_Valid_Configuration_Pragma; + Get_Name_String (Chars (Expression (Arg1))); + DP := Fold_Upper (Name_Buffer (1)); + + Lower_Bound := Expression (Arg2); + Check_Arg_Is_Static_Expression (Lower_Bound, Standard_Integer); + Lower_Val := Expr_Value (Lower_Bound); + + Upper_Bound := Expression (Arg3); + Check_Arg_Is_Static_Expression (Upper_Bound, Standard_Integer); + Upper_Val := Expr_Value (Upper_Bound); + + -- It is not allowed to use Task_Dispatching_Policy and + -- Priority_Specific_Dispatching in the same partition. + + if Task_Dispatching_Policy /= ' ' then + Error_Msg_Sloc := Task_Dispatching_Policy_Sloc; + Error_Pragma + ("pragma% incompatible with Task_Dispatching_Policy#"); + + -- Check lower bound in range + + elsif Lower_Val < Expr_Value (Type_Low_Bound (Prio_Id)) + or else + Lower_Val > Expr_Value (Type_High_Bound (Prio_Id)) + then + Error_Pragma_Arg + ("first_priority is out of range", Arg2); + + -- Check upper bound in range + + elsif Upper_Val < Expr_Value (Type_Low_Bound (Prio_Id)) + or else + Upper_Val > Expr_Value (Type_High_Bound (Prio_Id)) + then + Error_Pragma_Arg + ("last_priority is out of range", Arg3); + + -- Check that the priority range is valid + + elsif Lower_Val > Upper_Val then + Error_Pragma + ("last_priority_expression must be greater than" & + " or equal to first_priority_expression"); + + -- Store the new policy, but always preserve System_Location since + -- we like the error message with the run-time name. + + else + -- Check overlapping in the priority ranges specified in other + -- Priority_Specific_Dispatching pragmas within the same + -- partition. We can only check those we know about! + + for J in + Specific_Dispatching.First .. Specific_Dispatching.Last + loop + if Specific_Dispatching.Table (J).First_Priority in + UI_To_Int (Lower_Val) .. UI_To_Int (Upper_Val) + or else Specific_Dispatching.Table (J).Last_Priority in + UI_To_Int (Lower_Val) .. UI_To_Int (Upper_Val) + then + Error_Msg_Sloc := + Specific_Dispatching.Table (J).Pragma_Loc; + Error_Pragma + ("priority range overlaps with " + & "Priority_Specific_Dispatching#"); + end if; + end loop; + + -- The use of Priority_Specific_Dispatching is incompatible + -- with Task_Dispatching_Policy. + + if Task_Dispatching_Policy /= ' ' then + Error_Msg_Sloc := Task_Dispatching_Policy_Sloc; + Error_Pragma + ("Priority_Specific_Dispatching incompatible " + & "with Task_Dispatching_Policy#"); + end if; + + -- The use of Priority_Specific_Dispatching forces ceiling + -- locking policy. + + if Locking_Policy /= ' ' and then Locking_Policy /= 'C' then + Error_Msg_Sloc := Locking_Policy_Sloc; + Error_Pragma + ("Priority_Specific_Dispatching incompatible " + & "with Locking_Policy#"); + + -- Set the Ceiling_Locking policy, but preserve System_Location + -- since we like the error message with the run time name. + + else + Locking_Policy := 'C'; + + if Locking_Policy_Sloc /= System_Location then + Locking_Policy_Sloc := Loc; + end if; + end if; + + -- Add entry in the table + + Specific_Dispatching.Append + ((Dispatching_Policy => DP, + First_Priority => UI_To_Int (Lower_Val), + Last_Priority => UI_To_Int (Upper_Val), + Pragma_Loc => Loc)); + end if; + end Priority_Specific_Dispatching; + + ------------- + -- Profile -- + ------------- + + -- pragma Profile (profile_IDENTIFIER); + + -- profile_IDENTIFIER => Restricted | Ravenscar + + when Pragma_Profile => + Ada_2005_Pragma; + Check_Arg_Count (1); + Check_Valid_Configuration_Pragma; + Check_No_Identifiers; + + declare + Argx : constant Node_Id := Get_Pragma_Arg (Arg1); + begin + if Chars (Argx) = Name_Ravenscar then + Set_Ravenscar_Profile (N); + elsif Chars (Argx) = Name_Restricted then + Set_Profile_Restrictions + (Restricted, N, Warn => Treat_Restrictions_As_Warnings); + else + Error_Pragma_Arg ("& is not a valid profile", Argx); + end if; + end; + + ---------------------- + -- Profile_Warnings -- + ---------------------- + + -- pragma Profile_Warnings (profile_IDENTIFIER); + + -- profile_IDENTIFIER => Restricted | Ravenscar + + when Pragma_Profile_Warnings => + GNAT_Pragma; + Check_Arg_Count (1); + Check_Valid_Configuration_Pragma; + Check_No_Identifiers; + + declare + Argx : constant Node_Id := Get_Pragma_Arg (Arg1); + begin + if Chars (Argx) = Name_Ravenscar then + Set_Profile_Restrictions (Ravenscar, N, Warn => True); + elsif Chars (Argx) = Name_Restricted then + Set_Profile_Restrictions (Restricted, N, Warn => True); + else + Error_Pragma_Arg ("& is not a valid profile", Argx); + end if; + end; + + -------------------------- + -- Propagate_Exceptions -- + -------------------------- + + -- pragma Propagate_Exceptions; + + -- Note: this pragma is obsolete and has no effect + + when Pragma_Propagate_Exceptions => + GNAT_Pragma; + Check_Arg_Count (0); + + if In_Extended_Main_Source_Unit (N) then + Propagate_Exceptions := True; + end if; + + ------------------ + -- Psect_Object -- + ------------------ + + -- pragma Psect_Object ( + -- [Internal =>] LOCAL_NAME, + -- [, [External =>] EXTERNAL_SYMBOL] + -- [, [Size =>] EXTERNAL_SYMBOL]); + + when Pragma_Psect_Object | Pragma_Common_Object => + Psect_Object : declare + Args : Args_List (1 .. 3); + Names : constant Name_List (1 .. 3) := ( + Name_Internal, + Name_External, + Name_Size); + + Internal : Node_Id renames Args (1); + External : Node_Id renames Args (2); + Size : Node_Id renames Args (3); + + Def_Id : Entity_Id; + + procedure Check_Too_Long (Arg : Node_Id); + -- Posts message if the argument is an identifier with more + -- than 31 characters, or a string literal with more than + -- 31 characters, and we are operating under VMS + + -------------------- + -- Check_Too_Long -- + -------------------- + + procedure Check_Too_Long (Arg : Node_Id) is + X : constant Node_Id := Original_Node (Arg); + + begin + if Nkind (X) /= N_String_Literal + and then + Nkind (X) /= N_Identifier + then + Error_Pragma_Arg + ("inappropriate argument for pragma %", Arg); + end if; + + if OpenVMS_On_Target then + if (Nkind (X) = N_String_Literal + and then String_Length (Strval (X)) > 31) + or else + (Nkind (X) = N_Identifier + and then Length_Of_Name (Chars (X)) > 31) + then + Error_Pragma_Arg + ("argument for pragma % is longer than 31 characters", + Arg); + end if; + end if; + end Check_Too_Long; + + -- Start of processing for Common_Object/Psect_Object + + begin + GNAT_Pragma; + Gather_Associations (Names, Args); + Process_Extended_Import_Export_Internal_Arg (Internal); + + Def_Id := Entity (Internal); + + if Ekind (Def_Id) /= E_Constant + and then Ekind (Def_Id) /= E_Variable + then + Error_Pragma_Arg + ("pragma% must designate an object", Internal); + end if; + + Check_Too_Long (Internal); + + if Is_Imported (Def_Id) or else Is_Exported (Def_Id) then + Error_Pragma_Arg + ("cannot use pragma% for imported/exported object", + Internal); + end if; + + if Is_Concurrent_Type (Etype (Internal)) then + Error_Pragma_Arg + ("cannot specify pragma % for task/protected object", + Internal); + end if; + + if Has_Rep_Pragma (Def_Id, Name_Common_Object) + or else + Has_Rep_Pragma (Def_Id, Name_Psect_Object) + then + Error_Msg_N ("?duplicate Common/Psect_Object pragma", N); + end if; + + if Ekind (Def_Id) = E_Constant then + Error_Pragma_Arg + ("cannot specify pragma % for a constant", Internal); + end if; + + if Is_Record_Type (Etype (Internal)) then + declare + Ent : Entity_Id; + Decl : Entity_Id; + + begin + Ent := First_Entity (Etype (Internal)); + while Present (Ent) loop + Decl := Declaration_Node (Ent); + + if Ekind (Ent) = E_Component + and then Nkind (Decl) = N_Component_Declaration + and then Present (Expression (Decl)) + and then Warn_On_Export_Import + then + Error_Msg_N + ("?object for pragma % has defaults", Internal); + exit; + + else + Next_Entity (Ent); + end if; + end loop; + end; + end if; + + if Present (Size) then + Check_Too_Long (Size); + end if; + + if Present (External) then + Check_Arg_Is_External_Name (External); + Check_Too_Long (External); + end if; + + -- If all error tests pass, link pragma on to the rep item chain + + Record_Rep_Item (Def_Id, N); + end Psect_Object; + + ---------- + -- Pure -- + ---------- + + -- pragma Pure [(library_unit_NAME)]; + + when Pragma_Pure => Pure : declare + Ent : Entity_Id; + + begin + Check_Ada_83_Warning; + Check_Valid_Library_Unit_Pragma; + + if Nkind (N) = N_Null_Statement then + return; + end if; + + Ent := Find_Lib_Unit_Name; + Set_Is_Pure (Ent); + Set_Has_Pragma_Pure (Ent); + Set_Suppress_Elaboration_Warnings (Ent); + end Pure; + + ------------- + -- Pure_05 -- + ------------- + + -- pragma Pure_05 [(library_unit_NAME)]; + + -- This pragma is useable only in GNAT_Mode, where it is used like + -- pragma Pure but it is only effective in Ada 2005 mode (otherwise + -- it is ignored). It may be used after a pragma Preelaborate, in + -- which case it overrides the effect of the pragma Preelaborate. + -- This is used to implement AI-362 which recategorizes some run-time + -- packages in Ada 2005 mode. + + when Pragma_Pure_05 => Pure_05 : declare + Ent : Entity_Id; + + begin + GNAT_Pragma; + Check_Valid_Library_Unit_Pragma; + + if not GNAT_Mode then + Error_Pragma ("pragma% only available in GNAT mode"); + end if; + if Nkind (N) = N_Null_Statement then + return; + end if; + + -- This is one of the few cases where we need to test the value of + -- Ada_Version_Explicit rather than Ada_Version (which is always + -- set to Ada_05 in a predefined unit), we need to know the + -- explicit version set to know if this pragma is active. + + if Ada_Version_Explicit >= Ada_05 then + Ent := Find_Lib_Unit_Name; + Set_Is_Preelaborated (Ent, False); + Set_Is_Pure (Ent); + Set_Suppress_Elaboration_Warnings (Ent); + end if; + end Pure_05; + + ------------------- + -- Pure_Function -- + ------------------- + + -- pragma Pure_Function ([Entity =>] function_LOCAL_NAME); + + when Pragma_Pure_Function => Pure_Function : declare + E_Id : Node_Id; + E : Entity_Id; + Def_Id : Entity_Id; + Effective : Boolean := False; + + begin + GNAT_Pragma; + Check_Arg_Count (1); + Check_Optional_Identifier (Arg1, Name_Entity); + Check_Arg_Is_Local_Name (Arg1); + E_Id := Expression (Arg1); + + if Error_Posted (E_Id) then + return; + end if; + + -- Loop through homonyms (overloadings) of referenced entity + + E := Entity (E_Id); + + if Present (E) then + loop + Def_Id := Get_Base_Subprogram (E); + + if Ekind (Def_Id) /= E_Function + and then Ekind (Def_Id) /= E_Generic_Function + and then Ekind (Def_Id) /= E_Operator + then + Error_Pragma_Arg + ("pragma% requires a function name", Arg1); + end if; + + Set_Is_Pure (Def_Id); + + if not Has_Pragma_Pure_Function (Def_Id) then + Set_Has_Pragma_Pure_Function (Def_Id); + Effective := True; + end if; + + E := Homonym (E); + exit when No (E) or else Scope (E) /= Current_Scope; + end loop; + + if not Effective + and then Warn_On_Redundant_Constructs + then + Error_Msg_NE ("pragma Pure_Function on& is redundant?", + N, Entity (E_Id)); + end if; + end if; + end Pure_Function; + + -------------------- + -- Queuing_Policy -- + -------------------- + + -- pragma Queuing_Policy (policy_IDENTIFIER); + + when Pragma_Queuing_Policy => declare + QP : Character; + + begin + Check_Ada_83_Warning; + Check_Arg_Count (1); + Check_No_Identifiers; + Check_Arg_Is_Queuing_Policy (Arg1); + Check_Valid_Configuration_Pragma; + Get_Name_String (Chars (Expression (Arg1))); + QP := Fold_Upper (Name_Buffer (1)); + + if Queuing_Policy /= ' ' + and then Queuing_Policy /= QP + then + Error_Msg_Sloc := Queuing_Policy_Sloc; + Error_Pragma ("queuing policy incompatible with policy#"); + + -- Set new policy, but always preserve System_Location since + -- we like the error message with the run time name. + + else + Queuing_Policy := QP; + + if Queuing_Policy_Sloc /= System_Location then + Queuing_Policy_Sloc := Loc; + end if; + end if; + end; + + ----------------------- + -- Relative_Deadline -- + ----------------------- + + -- pragma Relative_Deadline (time_span_EXPRESSION); + + when Pragma_Relative_Deadline => Relative_Deadline : declare + P : constant Node_Id := Parent (N); + Arg : Node_Id; + + begin + Ada_2005_Pragma; + Check_No_Identifiers; + Check_Arg_Count (1); + + Arg := Expression (Arg1); + + -- The expression must be analyzed in the special manner described + -- in "Handling of Default and Per-Object Expressions" in sem.ads. + + Preanalyze_Spec_Expression (Arg, RTE (RE_Time_Span)); + + -- Subprogram case + + if Nkind (P) = N_Subprogram_Body then + Check_In_Main_Program; + + -- Tasks + + elsif Nkind (P) = N_Task_Definition then + null; + + -- Anything else is incorrect + + else + Pragma_Misplaced; + end if; + + if Has_Relative_Deadline_Pragma (P) then + Error_Pragma ("duplicate pragma% not allowed"); + else + Set_Has_Relative_Deadline_Pragma (P, True); + + if Nkind (P) = N_Task_Definition then + Record_Rep_Item (Defining_Identifier (Parent (P)), N); + end if; + end if; + end Relative_Deadline; + + --------------------------- + -- Remote_Call_Interface -- + --------------------------- + + -- pragma Remote_Call_Interface [(library_unit_NAME)]; + + when Pragma_Remote_Call_Interface => Remote_Call_Interface : declare + Cunit_Node : Node_Id; + Cunit_Ent : Entity_Id; + K : Node_Kind; + + begin + Check_Ada_83_Warning; + Check_Valid_Library_Unit_Pragma; + + if Nkind (N) = N_Null_Statement then + return; + end if; + + Cunit_Node := Cunit (Current_Sem_Unit); + K := Nkind (Unit (Cunit_Node)); + Cunit_Ent := Cunit_Entity (Current_Sem_Unit); + + if K = N_Package_Declaration + or else K = N_Generic_Package_Declaration + or else K = N_Subprogram_Declaration + or else K = N_Generic_Subprogram_Declaration + or else (K = N_Subprogram_Body + and then Acts_As_Spec (Unit (Cunit_Node))) + then + null; + else + Error_Pragma ( + "pragma% must apply to package or subprogram declaration"); + end if; + + Set_Is_Remote_Call_Interface (Cunit_Ent); + end Remote_Call_Interface; + + ------------------ + -- Remote_Types -- + ------------------ + + -- pragma Remote_Types [(library_unit_NAME)]; + + when Pragma_Remote_Types => Remote_Types : declare + Cunit_Node : Node_Id; + Cunit_Ent : Entity_Id; + + begin + Check_Ada_83_Warning; + Check_Valid_Library_Unit_Pragma; + + if Nkind (N) = N_Null_Statement then + return; + end if; + + Cunit_Node := Cunit (Current_Sem_Unit); + Cunit_Ent := Cunit_Entity (Current_Sem_Unit); + + if Nkind (Unit (Cunit_Node)) /= N_Package_Declaration + and then + Nkind (Unit (Cunit_Node)) /= N_Generic_Package_Declaration + then + Error_Pragma ( + "pragma% can only apply to a package declaration"); + end if; + + Set_Is_Remote_Types (Cunit_Ent); + end Remote_Types; + + --------------- + -- Ravenscar -- + --------------- + + -- pragma Ravenscar; + + when Pragma_Ravenscar => + GNAT_Pragma; + Check_Arg_Count (0); + Check_Valid_Configuration_Pragma; + Set_Ravenscar_Profile (N); + + if Warn_On_Obsolescent_Feature then + Error_Msg_N + ("pragma Ravenscar is an obsolescent feature?", N); + Error_Msg_N + ("|use pragma Profile (Ravenscar) instead", N); + end if; + + ------------------------- + -- Restricted_Run_Time -- + ------------------------- + + -- pragma Restricted_Run_Time; + + when Pragma_Restricted_Run_Time => + GNAT_Pragma; + Check_Arg_Count (0); + Check_Valid_Configuration_Pragma; + Set_Profile_Restrictions + (Restricted, N, Warn => Treat_Restrictions_As_Warnings); + + if Warn_On_Obsolescent_Feature then + Error_Msg_N + ("pragma Restricted_Run_Time is an obsolescent feature?", N); + Error_Msg_N + ("|use pragma Profile (Restricted) instead", N); + end if; + + ------------------ + -- Restrictions -- + ------------------ + + -- pragma Restrictions (RESTRICTION {, RESTRICTION}); + + -- RESTRICTION ::= + -- restriction_IDENTIFIER + -- | restriction_parameter_IDENTIFIER => EXPRESSION + + when Pragma_Restrictions => + Process_Restrictions_Or_Restriction_Warnings + (Warn => Treat_Restrictions_As_Warnings); + + -------------------------- + -- Restriction_Warnings -- + -------------------------- + + -- pragma Restriction_Warnings (RESTRICTION {, RESTRICTION}); + + -- RESTRICTION ::= + -- restriction_IDENTIFIER + -- | restriction_parameter_IDENTIFIER => EXPRESSION + + when Pragma_Restriction_Warnings => + GNAT_Pragma; + Process_Restrictions_Or_Restriction_Warnings (Warn => True); + + ---------------- + -- Reviewable -- + ---------------- + + -- pragma Reviewable; + + when Pragma_Reviewable => + Check_Ada_83_Warning; + Check_Arg_Count (0); + rv; + + ------------------- + -- Share_Generic -- + ------------------- + + -- pragma Share_Generic (NAME {, NAME}); + + when Pragma_Share_Generic => + GNAT_Pragma; + Process_Generic_List; + + ------------ + -- Shared -- + ------------ + + -- pragma Shared (LOCAL_NAME); + + when Pragma_Shared => + GNAT_Pragma; + Process_Atomic_Shared_Volatile; + + -------------------- + -- Shared_Passive -- + -------------------- + + -- pragma Shared_Passive [(library_unit_NAME)]; + + -- Set the flag Is_Shared_Passive of program unit name entity + + when Pragma_Shared_Passive => Shared_Passive : declare + Cunit_Node : Node_Id; + Cunit_Ent : Entity_Id; + + begin + Check_Ada_83_Warning; + Check_Valid_Library_Unit_Pragma; + + if Nkind (N) = N_Null_Statement then + return; + end if; + + Cunit_Node := Cunit (Current_Sem_Unit); + Cunit_Ent := Cunit_Entity (Current_Sem_Unit); + + if Nkind (Unit (Cunit_Node)) /= N_Package_Declaration + and then + Nkind (Unit (Cunit_Node)) /= N_Generic_Package_Declaration + then + Error_Pragma ( + "pragma% can only apply to a package declaration"); + end if; + + Set_Is_Shared_Passive (Cunit_Ent); + end Shared_Passive; + + ---------------------- + -- Source_File_Name -- + ---------------------- + + -- There are five forms for this pragma: + + -- pragma Source_File_Name ( + -- [UNIT_NAME =>] unit_NAME, + -- BODY_FILE_NAME => STRING_LITERAL + -- [, [INDEX =>] INTEGER_LITERAL]); + + -- pragma Source_File_Name ( + -- [UNIT_NAME =>] unit_NAME, + -- SPEC_FILE_NAME => STRING_LITERAL + -- [, [INDEX =>] INTEGER_LITERAL]); + + -- pragma Source_File_Name ( + -- BODY_FILE_NAME => STRING_LITERAL + -- [, DOT_REPLACEMENT => STRING_LITERAL] + -- [, CASING => CASING_SPEC]); + + -- pragma Source_File_Name ( + -- SPEC_FILE_NAME => STRING_LITERAL + -- [, DOT_REPLACEMENT => STRING_LITERAL] + -- [, CASING => CASING_SPEC]); + + -- pragma Source_File_Name ( + -- SUBUNIT_FILE_NAME => STRING_LITERAL + -- [, DOT_REPLACEMENT => STRING_LITERAL] + -- [, CASING => CASING_SPEC]); + + -- CASING_SPEC ::= Uppercase | Lowercase | Mixedcase + + -- Pragma Source_File_Name_Project (SFNP) is equivalent to pragma + -- Source_File_Name (SFN), however their usage is exclusive: + -- SFN can only be used when no project file is used, while + -- SFNP can only be used when a project file is used. + + -- No processing here. Processing was completed during parsing, + -- since we need to have file names set as early as possible. + -- Units are loaded well before semantic processing starts. + + -- The only processing we defer to this point is the check + -- for correct placement. + + when Pragma_Source_File_Name => + GNAT_Pragma; + Check_Valid_Configuration_Pragma; + + ------------------------------ + -- Source_File_Name_Project -- + ------------------------------ + + -- See Source_File_Name for syntax + + -- No processing here. Processing was completed during parsing, + -- since we need to have file names set as early as possible. + -- Units are loaded well before semantic processing starts. + + -- The only processing we defer to this point is the check + -- for correct placement. + + when Pragma_Source_File_Name_Project => + GNAT_Pragma; + Check_Valid_Configuration_Pragma; + + -- Check that a pragma Source_File_Name_Project is used only + -- in a configuration pragmas file. + + -- Pragmas Source_File_Name_Project should only be generated + -- by the Project Manager in configuration pragmas files. + + -- This is really an ugly test. It seems to depend on some + -- accidental and undocumented property. At the very least + -- it needs to be documented, but it would be better to have + -- a clean way of testing if we are in a configuration file??? + + if Present (Parent (N)) then + Error_Pragma + ("pragma% can only appear in a configuration pragmas file"); + end if; + + ---------------------- + -- Source_Reference -- + ---------------------- + + -- pragma Source_Reference (INTEGER_LITERAL [, STRING_LITERAL]); + + -- Nothing to do, all processing completed in Par.Prag, since we + -- need the information for possible parser messages that are output + + when Pragma_Source_Reference => + GNAT_Pragma; + + -------------------------------- + -- Static_Elaboration_Desired -- + -------------------------------- + + -- pragma Static_Elaboration_Desired (DIRECT_NAME); + + when Pragma_Static_Elaboration_Desired => + GNAT_Pragma; + Check_At_Most_N_Arguments (1); + + if Is_Compilation_Unit (Current_Scope) + and then Ekind (Current_Scope) = E_Package + then + Set_Static_Elaboration_Desired (Current_Scope, True); + else + Error_Pragma ("pragma% must apply to a library-level package"); + end if; + + ------------------ + -- Storage_Size -- + ------------------ + + -- pragma Storage_Size (EXPRESSION); + + when Pragma_Storage_Size => Storage_Size : declare + P : constant Node_Id := Parent (N); + Arg : Node_Id; + + begin + Check_No_Identifiers; + Check_Arg_Count (1); + + -- The expression must be analyzed in the special manner described + -- in "Handling of Default Expressions" in sem.ads. + + Arg := Expression (Arg1); + Preanalyze_Spec_Expression (Arg, Any_Integer); + + if not Is_Static_Expression (Arg) then + Check_Restriction (Static_Storage_Size, Arg); + end if; + + if Nkind (P) /= N_Task_Definition then + Pragma_Misplaced; + return; + + else + if Has_Storage_Size_Pragma (P) then + Error_Pragma ("duplicate pragma% not allowed"); + else + Set_Has_Storage_Size_Pragma (P, True); + end if; + + Record_Rep_Item (Defining_Identifier (Parent (P)), N); + -- ??? exp_ch9 should use this! + end if; + end Storage_Size; + + ------------------ + -- Storage_Unit -- + ------------------ + + -- pragma Storage_Unit (NUMERIC_LITERAL); + + -- Only permitted argument is System'Storage_Unit value + + when Pragma_Storage_Unit => + Check_No_Identifiers; + Check_Arg_Count (1); + Check_Arg_Is_Integer_Literal (Arg1); + + if Intval (Expression (Arg1)) /= + UI_From_Int (Ttypes.System_Storage_Unit) + then + Error_Msg_Uint_1 := UI_From_Int (Ttypes.System_Storage_Unit); + Error_Pragma_Arg + ("the only allowed argument for pragma% is ^", Arg1); + end if; + + -------------------- + -- Stream_Convert -- + -------------------- + + -- pragma Stream_Convert ( + -- [Entity =>] type_LOCAL_NAME, + -- [Read =>] function_NAME, + -- [Write =>] function NAME); + + when Pragma_Stream_Convert => Stream_Convert : declare + + procedure Check_OK_Stream_Convert_Function (Arg : Node_Id); + -- Check that the given argument is the name of a local + -- function of one argument that is not overloaded earlier + -- in the current local scope. A check is also made that the + -- argument is a function with one parameter. + + -------------------------------------- + -- Check_OK_Stream_Convert_Function -- + -------------------------------------- + + procedure Check_OK_Stream_Convert_Function (Arg : Node_Id) is + Ent : Entity_Id; + + begin + Check_Arg_Is_Local_Name (Arg); + Ent := Entity (Expression (Arg)); + + if Has_Homonym (Ent) then + Error_Pragma_Arg + ("argument for pragma% may not be overloaded", Arg); + end if; + + if Ekind (Ent) /= E_Function + or else No (First_Formal (Ent)) + or else Present (Next_Formal (First_Formal (Ent))) + then + Error_Pragma_Arg + ("argument for pragma% must be" & + " function of one argument", Arg); + end if; + end Check_OK_Stream_Convert_Function; + + -- Start of processing for Stream_Convert + + begin + GNAT_Pragma; + Check_Arg_Order ((Name_Entity, Name_Read, Name_Write)); + Check_Arg_Count (3); + Check_Optional_Identifier (Arg1, Name_Entity); + Check_Optional_Identifier (Arg2, Name_Read); + Check_Optional_Identifier (Arg3, Name_Write); + Check_Arg_Is_Local_Name (Arg1); + Check_OK_Stream_Convert_Function (Arg2); + Check_OK_Stream_Convert_Function (Arg3); + + declare + Typ : constant Entity_Id := + Underlying_Type (Entity (Expression (Arg1))); + Read : constant Entity_Id := Entity (Expression (Arg2)); + Write : constant Entity_Id := Entity (Expression (Arg3)); + + begin + Check_First_Subtype (Arg1); + + -- Check for too early or too late. Note that we don't enforce + -- the rule about primitive operations in this case, since, as + -- is the case for explicit stream attributes themselves, these + -- restrictions are not appropriate. Note that the chaining of + -- the pragma by Rep_Item_Too_Late is actually the critical + -- processing done for this pragma. + + if Rep_Item_Too_Early (Typ, N) + or else + Rep_Item_Too_Late (Typ, N, FOnly => True) + then + return; + end if; + + -- Return if previous error + + if Etype (Typ) = Any_Type + or else + Etype (Read) = Any_Type + or else + Etype (Write) = Any_Type + then + return; + end if; + + -- Error checks + + if Underlying_Type (Etype (Read)) /= Typ then + Error_Pragma_Arg + ("incorrect return type for function&", Arg2); + end if; + + if Underlying_Type (Etype (First_Formal (Write))) /= Typ then + Error_Pragma_Arg + ("incorrect parameter type for function&", Arg3); + end if; + + if Underlying_Type (Etype (First_Formal (Read))) /= + Underlying_Type (Etype (Write)) + then + Error_Pragma_Arg + ("result type of & does not match Read parameter type", + Arg3); + end if; + end; + end Stream_Convert; + + ------------------------- + -- Style_Checks (GNAT) -- + ------------------------- + + -- pragma Style_Checks (On | Off | ALL_CHECKS | STRING_LITERAL); + + -- This is processed by the parser since some of the style + -- checks take place during source scanning and parsing. This + -- means that we don't need to issue error messages here. + + when Pragma_Style_Checks => Style_Checks : declare + A : constant Node_Id := Expression (Arg1); + S : String_Id; + C : Char_Code; + + begin + GNAT_Pragma; + Check_No_Identifiers; + + -- Two argument form + + if Arg_Count = 2 then + Check_Arg_Is_One_Of (Arg1, Name_On, Name_Off); + + declare + E_Id : Node_Id; + E : Entity_Id; + + begin + E_Id := Expression (Arg2); + Analyze (E_Id); + + if not Is_Entity_Name (E_Id) then + Error_Pragma_Arg + ("second argument of pragma% must be entity name", + Arg2); + end if; + + E := Entity (E_Id); + + if E = Any_Id then + return; + else + loop + Set_Suppress_Style_Checks (E, + (Chars (Expression (Arg1)) = Name_Off)); + exit when No (Homonym (E)); + E := Homonym (E); + end loop; + end if; + end; + + -- One argument form + + else + Check_Arg_Count (1); + + if Nkind (A) = N_String_Literal then + S := Strval (A); + + declare + Slen : constant Natural := Natural (String_Length (S)); + Options : String (1 .. Slen); + J : Natural; + + begin + J := 1; + loop + C := Get_String_Char (S, Int (J)); + exit when not In_Character_Range (C); + Options (J) := Get_Character (C); + + -- If at end of string, set options. As per discussion + -- above, no need to check for errors, since we issued + -- them in the parser. + + if J = Slen then + Set_Style_Check_Options (Options); + exit; + end if; + + J := J + 1; + end loop; + end; + + elsif Nkind (A) = N_Identifier then + if Chars (A) = Name_All_Checks then + Set_Default_Style_Check_Options; + + elsif Chars (A) = Name_On then + Style_Check := True; + + elsif Chars (A) = Name_Off then + Style_Check := False; + end if; + end if; + end if; + end Style_Checks; + + -------------- + -- Subtitle -- + -------------- + + -- pragma Subtitle ([Subtitle =>] STRING_LITERAL); + + when Pragma_Subtitle => + GNAT_Pragma; + Check_Arg_Count (1); + Check_Optional_Identifier (Arg1, Name_Subtitle); + Check_Arg_Is_String_Literal (Arg1); + + -------------- + -- Suppress -- + -------------- + + -- pragma Suppress (IDENTIFIER [, [On =>] NAME]); + + when Pragma_Suppress => + Process_Suppress_Unsuppress (True); + + ------------------ + -- Suppress_All -- + ------------------ + + -- pragma Suppress_All; + + -- The only check made here is that the pragma appears in the + -- proper place, i.e. following a compilation unit. If indeed + -- it appears in this context, then the parser has already + -- inserted an equivalent pragma Suppress (All_Checks) to get + -- the required effect. + + when Pragma_Suppress_All => + GNAT_Pragma; + Check_Arg_Count (0); + + if Nkind (Parent (N)) /= N_Compilation_Unit_Aux + or else not Is_List_Member (N) + or else List_Containing (N) /= Pragmas_After (Parent (N)) + then + Error_Pragma + ("misplaced pragma%, must follow compilation unit"); + end if; + + ------------------------- + -- Suppress_Debug_Info -- + ------------------------- + + -- pragma Suppress_Debug_Info ([Entity =>] LOCAL_NAME); + + when Pragma_Suppress_Debug_Info => + GNAT_Pragma; + Check_Arg_Count (1); + Check_Optional_Identifier (Arg1, Name_Entity); + Check_Arg_Is_Local_Name (Arg1); + Set_Debug_Info_Off (Entity (Get_Pragma_Arg (Arg1))); + + ---------------------------------- + -- Suppress_Exception_Locations -- + ---------------------------------- + + -- pragma Suppress_Exception_Locations; + + when Pragma_Suppress_Exception_Locations => + GNAT_Pragma; + Check_Arg_Count (0); + Check_Valid_Configuration_Pragma; + Exception_Locations_Suppressed := True; + + ----------------------------- + -- Suppress_Initialization -- + ----------------------------- + + -- pragma Suppress_Initialization ([Entity =>] type_Name); + + when Pragma_Suppress_Initialization => Suppress_Init : declare + E_Id : Node_Id; + E : Entity_Id; + + begin + GNAT_Pragma; + Check_Arg_Count (1); + Check_Optional_Identifier (Arg1, Name_Entity); + Check_Arg_Is_Local_Name (Arg1); + + E_Id := Expression (Arg1); + + if Etype (E_Id) = Any_Type then + return; + end if; + + E := Entity (E_Id); + + if Is_Type (E) then + if Is_Incomplete_Or_Private_Type (E) then + if No (Full_View (Base_Type (E))) then + Error_Pragma_Arg + ("argument of pragma% cannot be an incomplete type", + Arg1); + else + Set_Suppress_Init_Proc (Full_View (Base_Type (E))); + end if; + else + Set_Suppress_Init_Proc (Base_Type (E)); + end if; + + else + Error_Pragma_Arg + ("pragma% requires argument that is a type name", Arg1); + end if; + end Suppress_Init; + + ----------------- + -- System_Name -- + ----------------- + + -- pragma System_Name (DIRECT_NAME); + + -- Syntax check: one argument, which must be the identifier GNAT + -- or the identifier GCC, no other identifiers are acceptable. + + when Pragma_System_Name => + GNAT_Pragma; + Check_No_Identifiers; + Check_Arg_Count (1); + Check_Arg_Is_One_Of (Arg1, Name_Gcc, Name_Gnat); + + ----------------------------- + -- Task_Dispatching_Policy -- + ----------------------------- + + -- pragma Task_Dispatching_Policy (policy_IDENTIFIER); + + when Pragma_Task_Dispatching_Policy => declare + DP : Character; + + begin + Check_Ada_83_Warning; + Check_Arg_Count (1); + Check_No_Identifiers; + Check_Arg_Is_Task_Dispatching_Policy (Arg1); + Check_Valid_Configuration_Pragma; + Get_Name_String (Chars (Expression (Arg1))); + DP := Fold_Upper (Name_Buffer (1)); + + if Task_Dispatching_Policy /= ' ' + and then Task_Dispatching_Policy /= DP + then + Error_Msg_Sloc := Task_Dispatching_Policy_Sloc; + Error_Pragma + ("task dispatching policy incompatible with policy#"); + + -- Set new policy, but always preserve System_Location since + -- we like the error message with the run time name. + + else + Task_Dispatching_Policy := DP; + + if Task_Dispatching_Policy_Sloc /= System_Location then + Task_Dispatching_Policy_Sloc := Loc; + end if; + end if; + end; + + -------------- + -- Task_Info -- + -------------- + + -- pragma Task_Info (EXPRESSION); + + when Pragma_Task_Info => Task_Info : declare + P : constant Node_Id := Parent (N); + + begin + GNAT_Pragma; + + if Nkind (P) /= N_Task_Definition then + Error_Pragma ("pragma% must appear in task definition"); + end if; + + Check_No_Identifiers; + Check_Arg_Count (1); + + Analyze_And_Resolve (Expression (Arg1), RTE (RE_Task_Info_Type)); + + if Etype (Expression (Arg1)) = Any_Type then + return; + end if; + + if Has_Task_Info_Pragma (P) then + Error_Pragma ("duplicate pragma% not allowed"); + else + Set_Has_Task_Info_Pragma (P, True); + end if; + end Task_Info; + + --------------- + -- Task_Name -- + --------------- + + -- pragma Task_Name (string_EXPRESSION); + + when Pragma_Task_Name => Task_Name : declare + P : constant Node_Id := Parent (N); + Arg : Node_Id; + + begin + Check_No_Identifiers; + Check_Arg_Count (1); + + Arg := Expression (Arg1); + Analyze_And_Resolve (Arg, Standard_String); + + if Nkind (P) /= N_Task_Definition then + Pragma_Misplaced; + end if; + + if Has_Task_Name_Pragma (P) then + Error_Pragma ("duplicate pragma% not allowed"); + else + Set_Has_Task_Name_Pragma (P, True); + Record_Rep_Item (Defining_Identifier (Parent (P)), N); + end if; + end Task_Name; + + ------------------ + -- Task_Storage -- + ------------------ + + -- pragma Task_Storage ( + -- [Task_Type =>] LOCAL_NAME, + -- [Top_Guard =>] static_integer_EXPRESSION); + + when Pragma_Task_Storage => Task_Storage : declare + Args : Args_List (1 .. 2); + Names : constant Name_List (1 .. 2) := ( + Name_Task_Type, + Name_Top_Guard); + + Task_Type : Node_Id renames Args (1); + Top_Guard : Node_Id renames Args (2); + + Ent : Entity_Id; + + begin + GNAT_Pragma; + Gather_Associations (Names, Args); + + if No (Task_Type) then + Error_Pragma + ("missing task_type argument for pragma%"); + end if; + + Check_Arg_Is_Local_Name (Task_Type); + + Ent := Entity (Task_Type); + + if not Is_Task_Type (Ent) then + Error_Pragma_Arg + ("argument for pragma% must be task type", Task_Type); + end if; + + if No (Top_Guard) then + Error_Pragma_Arg + ("pragma% takes two arguments", Task_Type); + else + Check_Arg_Is_Static_Expression (Top_Guard, Any_Integer); + end if; + + Check_First_Subtype (Task_Type); + + if Rep_Item_Too_Late (Ent, N) then + raise Pragma_Exit; + end if; + end Task_Storage; + + ---------------- + -- Time_Slice -- + ---------------- + + -- pragma Time_Slice (static_duration_EXPRESSION); + + when Pragma_Time_Slice => Time_Slice : declare + Val : Ureal; + Nod : Node_Id; + + begin + GNAT_Pragma; + Check_Arg_Count (1); + Check_No_Identifiers; + Check_In_Main_Program; + Check_Arg_Is_Static_Expression (Arg1, Standard_Duration); + + if not Error_Posted (Arg1) then + Nod := Next (N); + while Present (Nod) loop + if Nkind (Nod) = N_Pragma + and then Pragma_Name (Nod) = Name_Time_Slice + then + Error_Msg_Name_1 := Pname; + Error_Msg_N ("duplicate pragma% not permitted", Nod); + end if; + + Next (Nod); + end loop; + end if; + + -- Process only if in main unit + + if Get_Source_Unit (Loc) = Main_Unit then + Opt.Time_Slice_Set := True; + Val := Expr_Value_R (Expression (Arg1)); + + if Val <= Ureal_0 then + Opt.Time_Slice_Value := 0; + + elsif Val > UR_From_Uint (UI_From_Int (1000)) then + Opt.Time_Slice_Value := 1_000_000_000; + + else + Opt.Time_Slice_Value := + UI_To_Int (UR_To_Uint (Val * UI_From_Int (1_000_000))); + end if; + end if; + end Time_Slice; + + ----------- + -- Title -- + ----------- + + -- pragma Title (TITLING_OPTION [, TITLING OPTION]); + + -- TITLING_OPTION ::= + -- [Title =>] STRING_LITERAL + -- | [Subtitle =>] STRING_LITERAL + + when Pragma_Title => Title : declare + Args : Args_List (1 .. 2); + Names : constant Name_List (1 .. 2) := ( + Name_Title, + Name_Subtitle); + + begin + GNAT_Pragma; + Gather_Associations (Names, Args); + + for J in 1 .. 2 loop + if Present (Args (J)) then + Check_Arg_Is_String_Literal (Args (J)); + end if; + end loop; + end Title; + + --------------------- + -- Unchecked_Union -- + --------------------- + + -- pragma Unchecked_Union (first_subtype_LOCAL_NAME) + + when Pragma_Unchecked_Union => Unchecked_Union : declare + Assoc : constant Node_Id := Arg1; + Type_Id : constant Node_Id := Expression (Assoc); + Typ : Entity_Id; + Discr : Entity_Id; + Tdef : Node_Id; + Clist : Node_Id; + Vpart : Node_Id; + Comp : Node_Id; + Variant : Node_Id; + + begin + Ada_2005_Pragma; + Check_No_Identifiers; + Check_Arg_Count (1); + Check_Arg_Is_Local_Name (Arg1); + + Find_Type (Type_Id); + Typ := Entity (Type_Id); + + if Typ = Any_Type + or else Rep_Item_Too_Early (Typ, N) + then + return; + else + Typ := Underlying_Type (Typ); + end if; + + if Rep_Item_Too_Late (Typ, N) then + return; + end if; + + Check_First_Subtype (Arg1); + + -- Note remaining cases are references to a type in the current + -- declarative part. If we find an error, we post the error on + -- the relevant type declaration at an appropriate point. + + if not Is_Record_Type (Typ) then + Error_Msg_N ("Unchecked_Union must be record type", Typ); + return; + + elsif Is_Tagged_Type (Typ) then + Error_Msg_N ("Unchecked_Union must not be tagged", Typ); + return; + + elsif Is_Limited_Type (Typ) then + Error_Msg_N + ("Unchecked_Union must not be limited record type", Typ); + Explain_Limited_Type (Typ, Typ); + return; + + else + if not Has_Discriminants (Typ) then + Error_Msg_N + ("Unchecked_Union must have one discriminant", Typ); + return; + end if; + + Discr := First_Discriminant (Typ); + while Present (Discr) loop + if No (Discriminant_Default_Value (Discr)) then + Error_Msg_N + ("Unchecked_Union discriminant must have default value", + Discr); + end if; + Next_Discriminant (Discr); + end loop; + + Tdef := Type_Definition (Declaration_Node (Typ)); + Clist := Component_List (Tdef); + + Comp := First (Component_Items (Clist)); + while Present (Comp) loop + Check_Component (Comp); + Next (Comp); + end loop; + + if No (Clist) or else No (Variant_Part (Clist)) then + Error_Msg_N + ("Unchecked_Union must have variant part", + Tdef); + return; + end if; + + Vpart := Variant_Part (Clist); + + Variant := First (Variants (Vpart)); + while Present (Variant) loop + Check_Variant (Variant); + Next (Variant); + end loop; + end if; + + Set_Is_Unchecked_Union (Typ, True); + Set_Convention (Typ, Convention_C); + + Set_Has_Unchecked_Union (Base_Type (Typ), True); + Set_Is_Unchecked_Union (Base_Type (Typ), True); + end Unchecked_Union; + + ------------------------ + -- Unimplemented_Unit -- + ------------------------ + + -- pragma Unimplemented_Unit; + + -- Note: this only gives an error if we are generating code, + -- or if we are in a generic library unit (where the pragma + -- appears in the body, not in the spec). + + when Pragma_Unimplemented_Unit => Unimplemented_Unit : declare + Cunitent : constant Entity_Id := + Cunit_Entity (Get_Source_Unit (Loc)); + Ent_Kind : constant Entity_Kind := + Ekind (Cunitent); + + begin + GNAT_Pragma; + Check_Arg_Count (0); + + if Operating_Mode = Generate_Code + or else Ent_Kind = E_Generic_Function + or else Ent_Kind = E_Generic_Procedure + or else Ent_Kind = E_Generic_Package + then + Get_Name_String (Chars (Cunitent)); + Set_Casing (Mixed_Case); + Write_Str (Name_Buffer (1 .. Name_Len)); + Write_Str (" is not supported in this configuration"); + Write_Eol; + raise Unrecoverable_Error; + end if; + end Unimplemented_Unit; + + ------------------------ + -- Universal_Aliasing -- + ------------------------ + + -- pragma Universal_Aliasing [([Entity =>] type_LOCAL_NAME)]; + + when Pragma_Universal_Aliasing => Universal_Alias : declare + E_Id : Entity_Id; + + begin + GNAT_Pragma; + Check_Arg_Count (1); + Check_Optional_Identifier (Arg2, Name_Entity); + Check_Arg_Is_Local_Name (Arg1); + E_Id := Entity (Expression (Arg1)); + + if E_Id = Any_Type then + return; + elsif No (E_Id) or else not Is_Type (E_Id) then + Error_Pragma_Arg ("pragma% requires type", Arg1); + end if; + + Set_Universal_Aliasing (Implementation_Base_Type (E_Id)); + end Universal_Alias; + + -------------------- + -- Universal_Data -- + -------------------- + + -- pragma Universal_Data [(library_unit_NAME)]; + + when Pragma_Universal_Data => + GNAT_Pragma; + + -- If this is a configuration pragma, then set the universal + -- addressing option, otherwise confirm that the pragma + -- satisfies the requirements of library unit pragma placement + -- and leave it to the GNAAMP back end to detect the pragma + -- (avoids transitive setting of the option due to withed units). + + if Is_Configuration_Pragma then + Universal_Addressing_On_AAMP := True; + else + Check_Valid_Library_Unit_Pragma; + end if; + + if not AAMP_On_Target then + Error_Pragma ("?pragma% ignored (applies only to AAMP)"); + end if; + + ---------------- + -- Unmodified -- + ---------------- + + -- pragma Unmodified (local_Name {, local_Name}); + + when Pragma_Unmodified => Unmodified : declare + Arg_Node : Node_Id; + Arg_Expr : Node_Id; + Arg_Ent : Entity_Id; + + begin + GNAT_Pragma; + Check_At_Least_N_Arguments (1); + + -- Loop through arguments + + Arg_Node := Arg1; + while Present (Arg_Node) loop + Check_No_Identifier (Arg_Node); + + -- Note: the analyze call done by Check_Arg_Is_Local_Name + -- will in fact generate reference, so that the entity will + -- have a reference, which will inhibit any warnings about + -- it not being referenced, and also properly show up in the + -- ali file as a reference. But this reference is recorded + -- before the Has_Pragma_Unreferenced flag is set, so that + -- no warning is generated for this reference. + + Check_Arg_Is_Local_Name (Arg_Node); + Arg_Expr := Get_Pragma_Arg (Arg_Node); + + if Is_Entity_Name (Arg_Expr) then + Arg_Ent := Entity (Arg_Expr); + + if not Is_Assignable (Arg_Ent) then + Error_Pragma_Arg + ("pragma% can only be applied to a variable", + Arg_Expr); + else + Set_Has_Pragma_Unmodified (Arg_Ent); + end if; + end if; + + Next (Arg_Node); + end loop; + end Unmodified; + + ------------------ + -- Unreferenced -- + ------------------ + + -- pragma Unreferenced (local_Name {, local_Name}); + + -- or when used in a context clause: + + -- pragma Unreferenced (library_unit_NAME {, library_unit_NAME} + + when Pragma_Unreferenced => Unreferenced : declare + Arg_Node : Node_Id; + Arg_Expr : Node_Id; + Arg_Ent : Entity_Id; + Citem : Node_Id; + + begin + GNAT_Pragma; + Check_At_Least_N_Arguments (1); + + -- Check case of appearing within context clause + + if Is_In_Context_Clause then + + -- The arguments must all be units mentioned in a with clause + -- in the same context clause. Note we already checked (in + -- Par.Prag) that the arguments are either identifiers or + -- selected components. + + Arg_Node := Arg1; + while Present (Arg_Node) loop + Citem := First (List_Containing (N)); + while Citem /= N loop + if Nkind (Citem) = N_With_Clause + and then Same_Name (Name (Citem), Expression (Arg_Node)) + then + Set_Has_Pragma_Unreferenced + (Cunit_Entity + (Get_Source_Unit + (Library_Unit (Citem)))); + Set_Unit_Name (Expression (Arg_Node), Name (Citem)); + exit; + end if; + + Next (Citem); + end loop; + + if Citem = N then + Error_Pragma_Arg + ("argument of pragma% is not with'ed unit", Arg_Node); + end if; + + Next (Arg_Node); + end loop; + + -- Case of not in list of context items + + else + Arg_Node := Arg1; + while Present (Arg_Node) loop + Check_No_Identifier (Arg_Node); + + -- Note: the analyze call done by Check_Arg_Is_Local_Name + -- will in fact generate reference, so that the entity will + -- have a reference, which will inhibit any warnings about + -- it not being referenced, and also properly show up in the + -- ali file as a reference. But this reference is recorded + -- before the Has_Pragma_Unreferenced flag is set, so that + -- no warning is generated for this reference. + + Check_Arg_Is_Local_Name (Arg_Node); + Arg_Expr := Get_Pragma_Arg (Arg_Node); + + if Is_Entity_Name (Arg_Expr) then + Arg_Ent := Entity (Arg_Expr); + + -- If the entity is overloaded, the pragma applies to the + -- most recent overloading, as documented. In this case, + -- name resolution does not generate a reference, so it + -- must be done here explicitly. + + if Is_Overloaded (Arg_Expr) then + Generate_Reference (Arg_Ent, N); + end if; + + Set_Has_Pragma_Unreferenced (Arg_Ent); + end if; + + Next (Arg_Node); + end loop; + end if; + end Unreferenced; + + -------------------------- + -- Unreferenced_Objects -- + -------------------------- + + -- pragma Unreferenced_Objects (local_Name {, local_Name}); + + when Pragma_Unreferenced_Objects => Unreferenced_Objects : declare + Arg_Node : Node_Id; + Arg_Expr : Node_Id; + + begin + GNAT_Pragma; + Check_At_Least_N_Arguments (1); + + Arg_Node := Arg1; + while Present (Arg_Node) loop + Check_No_Identifier (Arg_Node); + Check_Arg_Is_Local_Name (Arg_Node); + Arg_Expr := Get_Pragma_Arg (Arg_Node); + + if not Is_Entity_Name (Arg_Expr) + or else not Is_Type (Entity (Arg_Expr)) + then + Error_Pragma_Arg + ("argument for pragma% must be type or subtype", Arg_Node); + end if; + + Set_Has_Pragma_Unreferenced_Objects (Entity (Arg_Expr)); + Next (Arg_Node); + end loop; + end Unreferenced_Objects; + + ------------------------------ + -- Unreserve_All_Interrupts -- + ------------------------------ + + -- pragma Unreserve_All_Interrupts; + + when Pragma_Unreserve_All_Interrupts => + GNAT_Pragma; + Check_Arg_Count (0); + + if In_Extended_Main_Code_Unit (Main_Unit_Entity) then + Unreserve_All_Interrupts := True; + end if; + + ---------------- + -- Unsuppress -- + ---------------- + + -- pragma Unsuppress (IDENTIFIER [, [On =>] NAME]); + + when Pragma_Unsuppress => + Ada_2005_Pragma; + Process_Suppress_Unsuppress (False); + + ------------------- + -- Use_VADS_Size -- + ------------------- + + -- pragma Use_VADS_Size; + + when Pragma_Use_VADS_Size => + GNAT_Pragma; + Check_Arg_Count (0); + Check_Valid_Configuration_Pragma; + Use_VADS_Size := True; + + --------------------- + -- Validity_Checks -- + --------------------- + + -- pragma Validity_Checks (On | Off | ALL_CHECKS | STRING_LITERAL); + + when Pragma_Validity_Checks => Validity_Checks : declare + A : constant Node_Id := Expression (Arg1); + S : String_Id; + C : Char_Code; + + begin + GNAT_Pragma; + Check_Arg_Count (1); + Check_No_Identifiers; + + if Nkind (A) = N_String_Literal then + S := Strval (A); + + declare + Slen : constant Natural := Natural (String_Length (S)); + Options : String (1 .. Slen); + J : Natural; + + begin + J := 1; + loop + C := Get_String_Char (S, Int (J)); + exit when not In_Character_Range (C); + Options (J) := Get_Character (C); + + if J = Slen then + Set_Validity_Check_Options (Options); + exit; + else + J := J + 1; + end if; + end loop; + end; + + elsif Nkind (A) = N_Identifier then + + if Chars (A) = Name_All_Checks then + Set_Validity_Check_Options ("a"); + + elsif Chars (A) = Name_On then + Validity_Checks_On := True; + + elsif Chars (A) = Name_Off then + Validity_Checks_On := False; + + end if; + end if; + end Validity_Checks; + + -------------- + -- Volatile -- + -------------- + + -- pragma Volatile (LOCAL_NAME); + + when Pragma_Volatile => + Process_Atomic_Shared_Volatile; + + ------------------------- + -- Volatile_Components -- + ------------------------- + + -- pragma Volatile_Components (array_LOCAL_NAME); + + -- Volatile is handled by the same circuit as Atomic_Components + + -------------- + -- Warnings -- + -------------- + + -- pragma Warnings (On | Off); + -- pragma Warnings (On | Off, LOCAL_NAME); + -- pragma Warnings (static_string_EXPRESSION); + -- pragma Warnings (On | Off, STRING_LITERAL); + + when Pragma_Warnings => Warnings : begin + GNAT_Pragma; + Check_At_Least_N_Arguments (1); + Check_No_Identifiers; + + declare + Argx : constant Node_Id := Get_Pragma_Arg (Arg1); + + begin + -- One argument case + + if Arg_Count = 1 then + + -- On/Off one argument case was processed by parser + + if Nkind (Argx) = N_Identifier + and then + (Chars (Argx) = Name_On + or else + Chars (Argx) = Name_Off) + then + null; + + -- One argument case must be ON/OFF or static string expr + + elsif not Is_Static_String_Expression (Arg1) then + Error_Pragma_Arg + ("argument of pragma% must be On/Off or " & + "static string expression", Arg2); + + -- One argument string expression case + + else + declare + Lit : constant Node_Id := Expr_Value_S (Argx); + Str : constant String_Id := Strval (Lit); + Len : constant Nat := String_Length (Str); + C : Char_Code; + J : Nat; + OK : Boolean; + Chr : Character; + + begin + J := 1; + while J <= Len loop + C := Get_String_Char (Str, J); + OK := In_Character_Range (C); + + if OK then + Chr := Get_Character (C); + + -- Dot case + + if J < Len and then Chr = '.' then + J := J + 1; + C := Get_String_Char (Str, J); + Chr := Get_Character (C); + + if not Set_Dot_Warning_Switch (Chr) then + Error_Pragma_Arg + ("invalid warning switch character " & + '.' & Chr, Arg1); + end if; + + -- Non-Dot case + + else + OK := Set_Warning_Switch (Chr); + end if; + end if; + + if not OK then + Error_Pragma_Arg + ("invalid warning switch character " & Chr, + Arg1); + end if; + + J := J + 1; + end loop; + end; + end if; + + -- Two or more arguments (must be two) + + else + Check_Arg_Is_One_Of (Arg1, Name_On, Name_Off); + Check_At_Most_N_Arguments (2); + + declare + E_Id : Node_Id; + E : Entity_Id; + Err : Boolean; + + begin + E_Id := Expression (Arg2); + Analyze (E_Id); + + -- In the expansion of an inlined body, a reference to + -- the formal may be wrapped in a conversion if the + -- actual is a conversion. Retrieve the real entity name. + + if (In_Instance_Body + or else In_Inlined_Body) + and then Nkind (E_Id) = N_Unchecked_Type_Conversion + then + E_Id := Expression (E_Id); + end if; + + -- Entity name case + + if Is_Entity_Name (E_Id) then + E := Entity (E_Id); + + if E = Any_Id then + return; + else + loop + Set_Warnings_Off + (E, (Chars (Expression (Arg1)) = Name_Off)); + + if Chars (Expression (Arg1)) = Name_Off + and then Warn_On_Warnings_Off + then + Warnings_Off_Pragmas.Append ((N, E)); + end if; + + if Is_Enumeration_Type (E) then + declare + Lit : Entity_Id; + begin + Lit := First_Literal (E); + while Present (Lit) loop + Set_Warnings_Off (Lit); + Next_Literal (Lit); + end loop; + end; + end if; + + exit when No (Homonym (E)); + E := Homonym (E); + end loop; + end if; + + -- Error if not entity or static string literal case + + elsif not Is_Static_String_Expression (Arg2) then + Error_Pragma_Arg + ("second argument of pragma% must be entity " & + "name or static string expression", Arg2); + + -- String literal case + + else + String_To_Name_Buffer + (Strval (Expr_Value_S (Expression (Arg2)))); + + -- Note on configuration pragma case: If this is a + -- configuration pragma, then for an OFF pragma, we + -- just set Config True in the call, which is all + -- that needs to be done. For the case of ON, this + -- is normally an error, unless it is canceling the + -- effect of a previous OFF pragma in the same file. + -- In any other case, an error will be signalled (ON + -- with no matching OFF). + + if Chars (Argx) = Name_Off then + Set_Specific_Warning_Off + (Loc, Name_Buffer (1 .. Name_Len), + Config => Is_Configuration_Pragma); + + elsif Chars (Argx) = Name_On then + Set_Specific_Warning_On + (Loc, Name_Buffer (1 .. Name_Len), Err); + + if Err then + Error_Msg + ("?pragma Warnings On with no " & + "matching Warnings Off", + Loc); + end if; + end if; + end if; + end; + end if; + end; + end Warnings; + + ------------------- + -- Weak_External -- + ------------------- + + -- pragma Weak_External ([Entity =>] LOCAL_NAME); + + when Pragma_Weak_External => Weak_External : declare + Ent : Entity_Id; + + begin + GNAT_Pragma; + Check_Arg_Count (1); + Check_Optional_Identifier (Arg1, Name_Entity); + Check_Arg_Is_Library_Level_Local_Name (Arg1); + Ent := Entity (Expression (Arg1)); + + if Rep_Item_Too_Early (Ent, N) then + return; + else + Ent := Underlying_Type (Ent); + end if; + + -- The only processing required is to link this item on to the + -- list of rep items for the given entity. This is accomplished + -- by the call to Rep_Item_Too_Late (when no error is detected + -- and False is returned). + + if Rep_Item_Too_Late (Ent, N) then + return; + else + Set_Has_Gigi_Rep_Item (Ent); + end if; + end Weak_External; + + ----------------------------- + -- Wide_Character_Encoding -- + ----------------------------- + + -- pragma Wide_Character_Encoding (IDENTIFIER); + + when Pragma_Wide_Character_Encoding => + GNAT_Pragma; + + -- Nothing to do, handled in parser. Note that we do not enforce + -- configuration pragma placement, this pragma can appear at any + -- place in the source, allowing mixed encodings within a single + -- source program. + + null; + + -------------------- + -- Unknown_Pragma -- + -------------------- + + -- Should be impossible, since the case of an unknown pragma is + -- separately processed before the case statement is entered. + + when Unknown_Pragma => + raise Program_Error; + end case; + + exception + when Pragma_Exit => null; + end Analyze_Pragma; + + ------------------- + -- Check_Enabled -- + ------------------- + + function Check_Enabled (Nam : Name_Id) return Boolean is + PP : Node_Id; + + begin + PP := Opt.Check_Policy_List; + loop + if No (PP) then + return Assertions_Enabled; + + elsif + Nam = Chars (Expression (First (Pragma_Argument_Associations (PP)))) + then + case + Chars (Expression (Last (Pragma_Argument_Associations (PP)))) + is + when Name_On | Name_Check => + return True; + when Name_Off | Name_Ignore => + return False; + when others => + raise Program_Error; + end case; + + else + PP := Next_Pragma (PP); + end if; + end loop; + end Check_Enabled; + + --------------------------------- + -- Delay_Config_Pragma_Analyze -- + --------------------------------- + + function Delay_Config_Pragma_Analyze (N : Node_Id) return Boolean is + begin + return Pragma_Name (N) = Name_Interrupt_State + or else + Pragma_Name (N) = Name_Priority_Specific_Dispatching; + end Delay_Config_Pragma_Analyze; + + ------------------------- + -- Get_Base_Subprogram -- + ------------------------- + + function Get_Base_Subprogram (Def_Id : Entity_Id) return Entity_Id is + Result : Entity_Id; + + begin + -- Follow subprogram renaming chain + + Result := Def_Id; + while Is_Subprogram (Result) + and then + (Is_Generic_Instance (Result) + or else Nkind (Parent (Declaration_Node (Result))) = + N_Subprogram_Renaming_Declaration) + and then Present (Alias (Result)) + loop + Result := Alias (Result); + end loop; + + return Result; + end Get_Base_Subprogram; + + -------------------- + -- Get_Pragma_Arg -- + -------------------- + + function Get_Pragma_Arg (Arg : Node_Id) return Node_Id is + begin + if Nkind (Arg) = N_Pragma_Argument_Association then + return Expression (Arg); + else + return Arg; + end if; + end Get_Pragma_Arg; + + ---------------- + -- Initialize -- + ---------------- + + procedure Initialize is + begin + Externals.Init; + end Initialize; + + ----------------------------- + -- Is_Config_Static_String -- + ----------------------------- + + function Is_Config_Static_String (Arg : Node_Id) return Boolean is + + function Add_Config_Static_String (Arg : Node_Id) return Boolean; + -- This is an internal recursive function that is just like the + -- outer function except that it adds the string to the name buffer + -- rather than placing the string in the name buffer. + + ------------------------------ + -- Add_Config_Static_String -- + ------------------------------ + + function Add_Config_Static_String (Arg : Node_Id) return Boolean is + N : Node_Id; + C : Char_Code; + + begin + N := Arg; + + if Nkind (N) = N_Op_Concat then + if Add_Config_Static_String (Left_Opnd (N)) then + N := Right_Opnd (N); + else + return False; + end if; + end if; + + if Nkind (N) /= N_String_Literal then + Error_Msg_N ("string literal expected for pragma argument", N); + return False; + + else + for J in 1 .. String_Length (Strval (N)) loop + C := Get_String_Char (Strval (N), J); + + if not In_Character_Range (C) then + Error_Msg + ("string literal contains invalid wide character", + Sloc (N) + 1 + Source_Ptr (J)); + return False; + end if; + + Add_Char_To_Name_Buffer (Get_Character (C)); + end loop; + end if; + + return True; + end Add_Config_Static_String; + + -- Start of processing for Is_Config_Static_String + + begin + + Name_Len := 0; + return Add_Config_Static_String (Arg); + end Is_Config_Static_String; + + ----------------------------------------- + -- Is_Non_Significant_Pragma_Reference -- + ----------------------------------------- + + -- This function makes use of the following static table which indicates + -- whether a given pragma is significant. A value of -1 in this table + -- indicates that the reference is significant. A value of zero indicates + -- than appearance as any argument is insignificant, a positive value + -- indicates that appearance in that parameter position is significant. + + -- A value of 99 flags a special case requiring a special check (this is + -- used for cases not covered by this standard encoding, e.g. pragma Check + -- where the first argument is not significant, but the others are). + + Sig_Flags : constant array (Pragma_Id) of Int := + (Pragma_AST_Entry => -1, + Pragma_Abort_Defer => -1, + Pragma_Ada_83 => -1, + Pragma_Ada_95 => -1, + Pragma_Ada_05 => -1, + Pragma_Ada_2005 => -1, + Pragma_All_Calls_Remote => -1, + Pragma_Annotate => -1, + Pragma_Assert => -1, + Pragma_Assertion_Policy => 0, + Pragma_Assume_No_Invalid_Values => 0, + Pragma_Asynchronous => -1, + Pragma_Atomic => 0, + Pragma_Atomic_Components => 0, + Pragma_Attach_Handler => -1, + Pragma_Check => 99, + Pragma_Check_Name => 0, + Pragma_Check_Policy => 0, + Pragma_CIL_Constructor => -1, + Pragma_CPP_Class => 0, + Pragma_CPP_Constructor => 0, + Pragma_CPP_Virtual => 0, + Pragma_CPP_Vtable => 0, + Pragma_C_Pass_By_Copy => 0, + Pragma_Comment => 0, + Pragma_Common_Object => -1, + Pragma_Compile_Time_Error => -1, + Pragma_Compile_Time_Warning => -1, + Pragma_Compiler_Unit => 0, + Pragma_Complete_Representation => 0, + Pragma_Complex_Representation => 0, + Pragma_Component_Alignment => -1, + Pragma_Controlled => 0, + Pragma_Convention => 0, + Pragma_Convention_Identifier => 0, + Pragma_Debug => -1, + Pragma_Debug_Policy => 0, + Pragma_Detect_Blocking => -1, + Pragma_Discard_Names => 0, + Pragma_Elaborate => -1, + Pragma_Elaborate_All => -1, + Pragma_Elaborate_Body => -1, + Pragma_Elaboration_Checks => -1, + Pragma_Eliminate => -1, + Pragma_Export => -1, + Pragma_Export_Exception => -1, + Pragma_Export_Function => -1, + Pragma_Export_Object => -1, + Pragma_Export_Procedure => -1, + Pragma_Export_Value => -1, + Pragma_Export_Valued_Procedure => -1, + Pragma_Extend_System => -1, + Pragma_Extensions_Allowed => -1, + Pragma_External => -1, + Pragma_Favor_Top_Level => -1, + Pragma_External_Name_Casing => -1, + Pragma_Fast_Math => -1, + Pragma_Finalize_Storage_Only => 0, + Pragma_Float_Representation => 0, + Pragma_Ident => -1, + Pragma_Implemented_By_Entry => -1, + Pragma_Implicit_Packing => 0, + Pragma_Import => +2, + Pragma_Import_Exception => 0, + Pragma_Import_Function => 0, + Pragma_Import_Object => 0, + Pragma_Import_Procedure => 0, + Pragma_Import_Valued_Procedure => 0, + Pragma_Initialize_Scalars => -1, + Pragma_Inline => 0, + Pragma_Inline_Always => 0, + Pragma_Inline_Generic => 0, + Pragma_Inspection_Point => -1, + Pragma_Interface => +2, + Pragma_Interface_Name => +2, + Pragma_Interrupt_Handler => -1, + Pragma_Interrupt_Priority => -1, + Pragma_Interrupt_State => -1, + Pragma_Java_Constructor => -1, + Pragma_Java_Interface => -1, + Pragma_Keep_Names => 0, + Pragma_License => -1, + Pragma_Link_With => -1, + Pragma_Linker_Alias => -1, + Pragma_Linker_Constructor => -1, + Pragma_Linker_Destructor => -1, + Pragma_Linker_Options => -1, + Pragma_Linker_Section => -1, + Pragma_List => -1, + Pragma_Locking_Policy => -1, + Pragma_Long_Float => -1, + Pragma_Machine_Attribute => -1, + Pragma_Main => -1, + Pragma_Main_Storage => -1, + Pragma_Memory_Size => -1, + Pragma_No_Return => 0, + Pragma_No_Body => 0, + Pragma_No_Run_Time => -1, + Pragma_No_Strict_Aliasing => -1, + Pragma_Normalize_Scalars => -1, + Pragma_Obsolescent => 0, + Pragma_Optimize => -1, + Pragma_Optimize_Alignment => -1, + Pragma_Pack => 0, + Pragma_Page => -1, + Pragma_Passive => -1, + Pragma_Preelaborable_Initialization => -1, + Pragma_Polling => -1, + Pragma_Persistent_BSS => 0, + Pragma_Postcondition => -1, + Pragma_Precondition => -1, + Pragma_Preelaborate => -1, + Pragma_Preelaborate_05 => -1, + Pragma_Priority => -1, + Pragma_Priority_Specific_Dispatching => -1, + Pragma_Profile => 0, + Pragma_Profile_Warnings => 0, + Pragma_Propagate_Exceptions => -1, + Pragma_Psect_Object => -1, + Pragma_Pure => -1, + Pragma_Pure_05 => -1, + Pragma_Pure_Function => -1, + Pragma_Queuing_Policy => -1, + Pragma_Ravenscar => -1, + Pragma_Relative_Deadline => -1, + Pragma_Remote_Call_Interface => -1, + Pragma_Remote_Types => -1, + Pragma_Restricted_Run_Time => -1, + Pragma_Restriction_Warnings => -1, + Pragma_Restrictions => -1, + Pragma_Reviewable => -1, + Pragma_Share_Generic => -1, + Pragma_Shared => -1, + Pragma_Shared_Passive => -1, + Pragma_Source_File_Name => -1, + Pragma_Source_File_Name_Project => -1, + Pragma_Source_Reference => -1, + Pragma_Storage_Size => -1, + Pragma_Storage_Unit => -1, + Pragma_Static_Elaboration_Desired => -1, + Pragma_Stream_Convert => -1, + Pragma_Style_Checks => -1, + Pragma_Subtitle => -1, + Pragma_Suppress => 0, + Pragma_Suppress_Exception_Locations => 0, + Pragma_Suppress_All => -1, + Pragma_Suppress_Debug_Info => 0, + Pragma_Suppress_Initialization => 0, + Pragma_System_Name => -1, + Pragma_Task_Dispatching_Policy => -1, + Pragma_Task_Info => -1, + Pragma_Task_Name => -1, + Pragma_Task_Storage => 0, + Pragma_Time_Slice => -1, + Pragma_Title => -1, + Pragma_Unchecked_Union => 0, + Pragma_Unimplemented_Unit => -1, + Pragma_Universal_Aliasing => -1, + Pragma_Universal_Data => -1, + Pragma_Unmodified => -1, + Pragma_Unreferenced => -1, + Pragma_Unreferenced_Objects => -1, + Pragma_Unreserve_All_Interrupts => -1, + Pragma_Unsuppress => 0, + Pragma_Use_VADS_Size => -1, + Pragma_Validity_Checks => -1, + Pragma_Volatile => 0, + Pragma_Volatile_Components => 0, + Pragma_Warnings => -1, + Pragma_Weak_External => -1, + Pragma_Wide_Character_Encoding => 0, + Unknown_Pragma => 0); + + function Is_Non_Significant_Pragma_Reference (N : Node_Id) return Boolean is + Id : Pragma_Id; + P : Node_Id; + C : Int; + A : Node_Id; + + begin + P := Parent (N); + + if Nkind (P) /= N_Pragma_Argument_Association then + return False; + + else + Id := Get_Pragma_Id (Parent (P)); + C := Sig_Flags (Id); + + case C is + when -1 => + return False; + + when 0 => + return True; + + when 99 => + case Id is + + -- For pragma Check, the first argument is not significant, + -- the second and the third (if present) arguments are + -- significant. + + when Pragma_Check => + return + P = First (Pragma_Argument_Associations (Parent (P))); + + when others => + raise Program_Error; + end case; + + when others => + A := First (Pragma_Argument_Associations (Parent (P))); + for J in 1 .. C - 1 loop + if No (A) then + return False; + end if; + + Next (A); + end loop; + + return A = P; -- is this wrong way round ??? + end case; + end if; + end Is_Non_Significant_Pragma_Reference; + + ------------------------------ + -- Is_Pragma_String_Literal -- + ------------------------------ + + -- This function returns true if the corresponding pragma argument is + -- a static string expression. These are the only cases in which string + -- literals can appear as pragma arguments. We also allow a string + -- literal as the first argument to pragma Assert (although it will + -- of course always generate a type error). + + function Is_Pragma_String_Literal (Par : Node_Id) return Boolean is + Pragn : constant Node_Id := Parent (Par); + Assoc : constant List_Id := Pragma_Argument_Associations (Pragn); + Pname : constant Name_Id := Pragma_Name (Pragn); + Argn : Natural; + N : Node_Id; + + begin + Argn := 1; + N := First (Assoc); + loop + exit when N = Par; + Argn := Argn + 1; + Next (N); + end loop; + + if Pname = Name_Assert then + return True; + + elsif Pname = Name_Export then + return Argn > 2; + + elsif Pname = Name_Ident then + return Argn = 1; + + elsif Pname = Name_Import then + return Argn > 2; + + elsif Pname = Name_Interface_Name then + return Argn > 1; + + elsif Pname = Name_Linker_Alias then + return Argn = 2; + + elsif Pname = Name_Linker_Section then + return Argn = 2; + + elsif Pname = Name_Machine_Attribute then + return Argn = 2; + + elsif Pname = Name_Source_File_Name then + return True; + + elsif Pname = Name_Source_Reference then + return Argn = 2; + + elsif Pname = Name_Title then + return True; + + elsif Pname = Name_Subtitle then + return True; + + else + return False; + end if; + end Is_Pragma_String_Literal; + + -------------------------------------- + -- Process_Compilation_Unit_Pragmas -- + -------------------------------------- + + procedure Process_Compilation_Unit_Pragmas (N : Node_Id) is + begin + -- A special check for pragma Suppress_All. This is a strange DEC + -- pragma, strange because it comes at the end of the unit. If we + -- have a pragma Suppress_All in the Pragmas_After of the current + -- unit, then we insert a pragma Suppress (All_Checks) at the start + -- of the context clause to ensure the correct processing. + + declare + PA : constant List_Id := Pragmas_After (Aux_Decls_Node (N)); + P : Node_Id; + + begin + if Present (PA) then + P := First (PA); + while Present (P) loop + if Pragma_Name (P) = Name_Suppress_All then + Prepend_To (Context_Items (N), + Make_Pragma (Sloc (P), + Chars => Name_Suppress, + Pragma_Argument_Associations => New_List ( + Make_Pragma_Argument_Association (Sloc (P), + Expression => + Make_Identifier (Sloc (P), + Chars => Name_All_Checks))))); + exit; + end if; + + Next (P); + end loop; + end if; + end; + end Process_Compilation_Unit_Pragmas; + + -------- + -- rv -- + -------- + + procedure rv is + begin + null; + end rv; + + -------------------------------- + -- Set_Encoded_Interface_Name -- + -------------------------------- + + procedure Set_Encoded_Interface_Name (E : Entity_Id; S : Node_Id) is + Str : constant String_Id := Strval (S); + Len : constant Int := String_Length (Str); + CC : Char_Code; + C : Character; + J : Int; + + Hex : constant array (0 .. 15) of Character := "0123456789abcdef"; + + procedure Encode; + -- Stores encoded value of character code CC. The encoding we + -- use an underscore followed by four lower case hex digits. + + ------------ + -- Encode -- + ------------ + + procedure Encode is + begin + Store_String_Char (Get_Char_Code ('_')); + Store_String_Char + (Get_Char_Code (Hex (Integer (CC / 2 ** 12)))); + Store_String_Char + (Get_Char_Code (Hex (Integer (CC / 2 ** 8 and 16#0F#)))); + Store_String_Char + (Get_Char_Code (Hex (Integer (CC / 2 ** 4 and 16#0F#)))); + Store_String_Char + (Get_Char_Code (Hex (Integer (CC and 16#0F#)))); + end Encode; + + -- Start of processing for Set_Encoded_Interface_Name + + begin + -- If first character is asterisk, this is a link name, and we + -- leave it completely unmodified. We also ignore null strings + -- (the latter case happens only in error cases) and no encoding + -- should occur for Java or AAMP interface names. + + if Len = 0 + or else Get_String_Char (Str, 1) = Get_Char_Code ('*') + or else VM_Target /= No_VM + or else AAMP_On_Target + then + Set_Interface_Name (E, S); + + else + J := 1; + loop + CC := Get_String_Char (Str, J); + + exit when not In_Character_Range (CC); + + C := Get_Character (CC); + + exit when C /= '_' and then C /= '$' + and then C not in '0' .. '9' + and then C not in 'a' .. 'z' + and then C not in 'A' .. 'Z'; + + if J = Len then + Set_Interface_Name (E, S); + return; + + else + J := J + 1; + end if; + end loop; + + -- Here we need to encode. The encoding we use as follows: + -- three underscores + four hex digits (lower case) + + Start_String; + + for J in 1 .. String_Length (Str) loop + CC := Get_String_Char (Str, J); + + if not In_Character_Range (CC) then + Encode; + else + C := Get_Character (CC); + + if C = '_' or else C = '$' + or else C in '0' .. '9' + or else C in 'a' .. 'z' + or else C in 'A' .. 'Z' + then + Store_String_Char (CC); + else + Encode; + end if; + end if; + end loop; + + Set_Interface_Name (E, + Make_String_Literal (Sloc (S), + Strval => End_String)); + end if; + end Set_Encoded_Interface_Name; + + ------------------- + -- Set_Unit_Name -- + ------------------- + + procedure Set_Unit_Name (N : Node_Id; With_Item : Node_Id) is + Pref : Node_Id; + Scop : Entity_Id; + + begin + if Nkind (N) = N_Identifier + and then Nkind (With_Item) = N_Identifier + then + Set_Entity (N, Entity (With_Item)); + + elsif Nkind (N) = N_Selected_Component then + Change_Selected_Component_To_Expanded_Name (N); + Set_Entity (N, Entity (With_Item)); + Set_Entity (Selector_Name (N), Entity (N)); + + Pref := Prefix (N); + Scop := Scope (Entity (N)); + while Nkind (Pref) = N_Selected_Component loop + Change_Selected_Component_To_Expanded_Name (Pref); + Set_Entity (Selector_Name (Pref), Scop); + Set_Entity (Pref, Scop); + Pref := Prefix (Pref); + Scop := Scope (Scop); + end loop; + + Set_Entity (Pref, Scop); + end if; + end Set_Unit_Name; + +end Sem_Prag; |