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diff --git a/gcc-4.4.3/gcc/ada/sem_util.ads b/gcc-4.4.3/gcc/ada/sem_util.ads deleted file mode 100644 index ce6d4bd99..000000000 --- a/gcc-4.4.3/gcc/ada/sem_util.ads +++ /dev/null @@ -1,1190 +0,0 @@ ------------------------------------------------------------------------------- --- -- --- GNAT COMPILER COMPONENTS -- --- -- --- S E M _ U T I L -- --- -- --- S p e c -- --- -- --- 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. -- --- -- ------------------------------------------------------------------------------- - --- Package containing utility procedures used throughout the semantics - -with Einfo; use Einfo; -with Namet; use Namet; -with Nmake; use Nmake; -with Snames; use Snames; -with Types; use Types; -with Uintp; use Uintp; -with Urealp; use Urealp; - -package Sem_Util is - - function Abstract_Interface_List (Typ : Entity_Id) return List_Id; - -- Given a type that implements interfaces look for its associated - -- definition node and return its list of interfaces. - - procedure Add_Access_Type_To_Process (E : Entity_Id; A : Entity_Id); - -- Add A to the list of access types to process when expanding the - -- freeze node of E. - - procedure Add_Global_Declaration (N : Node_Id); - -- These procedures adds a declaration N at the library level, to be - -- elaborated before any other code in the unit. It is used for example - -- for the entity that marks whether a unit has been elaborated. The - -- declaration is added to the Declarations list of the Aux_Decls_Node - -- for the current unit. The declarations are added in the current scope, - -- so the caller should push a new scope as required before the call. - - function Alignment_In_Bits (E : Entity_Id) return Uint; - -- If the alignment of the type or object E is currently known to the - -- compiler, then this function returns the alignment value in bits. - -- Otherwise Uint_0 is returned, indicating that the alignment of the - -- entity is not yet known to the compiler. - - procedure Apply_Compile_Time_Constraint_Error - (N : Node_Id; - Msg : String; - Reason : RT_Exception_Code; - Ent : Entity_Id := Empty; - Typ : Entity_Id := Empty; - Loc : Source_Ptr := No_Location; - Rep : Boolean := True; - Warn : Boolean := False); - -- N is a subexpression which will raise constraint error when evaluated - -- at runtime. Msg is a message that explains the reason for raising the - -- exception. The last character is ? if the message is always a warning, - -- even in Ada 95, and is not a ? if the message represents an illegality - -- (because of violation of static expression rules) in Ada 95 (but not - -- in Ada 83). Typically this routine posts all messages at the Sloc of - -- node N. However, if Loc /= No_Location, Loc is the Sloc used to output - -- the message. After posting the appropriate message, and if the flag - -- Rep is set, this routine replaces the expression with an appropriate - -- N_Raise_Constraint_Error node using the given Reason code. This node - -- is then marked as being static if the original node is static, but - -- sets the flag Raises_Constraint_Error, preventing further evaluation. - -- The error message may contain a } or & insertion character. This - -- normally references Etype (N), unless the Ent argument is given - -- explicitly, in which case it is used instead. The type of the raise - -- node that is built is normally Etype (N), but if the Typ parameter - -- is present, this is used instead. Warn is normally False. If it is - -- True then the message is treated as a warning even though it does - -- not end with a ? (this is used when the caller wants to parametrize - -- whether an error or warning is given. - - function Build_Actual_Subtype - (T : Entity_Id; - N : Node_Or_Entity_Id) return Node_Id; - -- Build an anonymous subtype for an entity or expression, using the - -- bounds of the entity or the discriminants of the enclosing record. - -- T is the type for which the actual subtype is required, and N is either - -- a defining identifier, or any subexpression. - - function Build_Actual_Subtype_Of_Component - (T : Entity_Id; - N : Node_Id) return Node_Id; - -- Determine whether a selected component has a type that depends on - -- discriminants, and build actual subtype for it if so. - - function Build_Default_Subtype - (T : Entity_Id; - N : Node_Id) return Entity_Id; - -- If T is an unconstrained type with defaulted discriminants, build a - -- subtype constrained by the default values, insert the subtype - -- declaration in the tree before N, and return the entity of that - -- subtype. Otherwise, simply return T. - - function Build_Discriminal_Subtype_Of_Component - (T : Entity_Id) return Node_Id; - -- Determine whether a record component has a type that depends on - -- discriminants, and build actual subtype for it if so. - - procedure Build_Elaboration_Entity (N : Node_Id; Spec_Id : Entity_Id); - -- Given a compilation unit node N, allocate an elaboration boolean for - -- the compilation unit, and install it in the Elaboration_Entity field - -- of Spec_Id, the entity for the compilation unit. - - function Cannot_Raise_Constraint_Error (Expr : Node_Id) return Boolean; - -- Returns True if the expression cannot possibly raise Constraint_Error. - -- The response is conservative in the sense that a result of False does - -- not necessarily mean that CE could be raised, but a response of True - -- means that for sure CE cannot be raised. - - procedure Check_Fully_Declared (T : Entity_Id; N : Node_Id); - -- Verify that the full declaration of type T has been seen. If not, - -- place error message on node N. Used in object declarations, type - -- conversions, qualified expressions. - - procedure Check_Nested_Access (Ent : Entity_Id); - -- Check whether Ent denotes an entity declared in an uplevel scope, which - -- is accessed inside a nested procedure, and set Has_Up_Level_Access flag - -- accordingly. This is currently only enabled for VM_Target /= No_VM. - - procedure Check_Potentially_Blocking_Operation (N : Node_Id); - -- N is one of the statement forms that is a potentially blocking - -- operation. If it appears within a protected action, emit warning. - - procedure Check_Unprotected_Access - (Context : Node_Id; - Expr : Node_Id); - -- Check whether the expression is a pointer to a protected component, - -- and the context is external to the protected operation, to warn against - -- a possible unlocked access to data. - - procedure Check_VMS (Construct : Node_Id); - -- Check that this the target is OpenVMS, and if so, return with - -- no effect, otherwise post an error noting this can only be used - -- with OpenVMS ports. The argument is the construct in question - -- and is used to post the error message. - - procedure Collect_Interfaces - (T : Entity_Id; - Ifaces_List : out Elist_Id; - Exclude_Parents : Boolean := False; - Use_Full_View : Boolean := True); - -- Ada 2005 (AI-251): Collect whole list of abstract interfaces that are - -- directly or indirectly implemented by T. Exclude_Parents is used to - -- avoid the addition of inherited interfaces to the generated list. - -- Use_Full_View is used to collect the interfaces using the full-view - -- (if available). - - procedure Collect_Interface_Components - (Tagged_Type : Entity_Id; - Components_List : out Elist_Id); - -- Ada 2005 (AI-251): Collect all the tag components associated with the - -- secondary dispatch tables of a tagged type. - - procedure Collect_Interfaces_Info - (T : Entity_Id; - Ifaces_List : out Elist_Id; - Components_List : out Elist_Id; - Tags_List : out Elist_Id); - -- Ada 2005 (AI-251): Collect all the interfaces associated with T plus - -- the record component and tag associated with each of these interfaces. - -- On exit Ifaces_List, Components_List and Tags_List have the same number - -- of elements, and elements at the same position on these tables provide - -- information on the same interface type. - - function Collect_Primitive_Operations (T : Entity_Id) return Elist_Id; - -- Called upon type derivation and extension. We scan the declarative - -- part in which the type appears, and collect subprograms that have - -- one subsidiary subtype of the type. These subprograms can only - -- appear after the type itself. - - function Compile_Time_Constraint_Error - (N : Node_Id; - Msg : String; - Ent : Entity_Id := Empty; - Loc : Source_Ptr := No_Location; - Warn : Boolean := False) return Node_Id; - -- This is similar to Apply_Compile_Time_Constraint_Error in that it - -- generates a warning (or error) message in the same manner, but it does - -- not replace any nodes. For convenience, the function always returns its - -- first argument. The message is a warning if the message ends with ?, or - -- we are operating in Ada 83 mode, or if the Warn parameter is set to - -- True. - - procedure Conditional_Delay (New_Ent, Old_Ent : Entity_Id); - -- Sets the Has_Delayed_Freeze flag of New if the Delayed_Freeze flag - -- of Old is set and Old has no yet been Frozen (i.e. Is_Frozen is false); - - function Copy_Parameter_List (Subp_Id : Entity_Id) return List_Id; - -- Utility to create a parameter profile for a new subprogram spec, - -- when the subprogram has a body that acts as spec. This is done for - -- some cases of inlining, and for private protected ops. Also used - -- to create bodies for stubbed subprograms. - - function Current_Entity (N : Node_Id) return Entity_Id; - -- Find the currently visible definition for a given identifier, that is to - -- say the first entry in the visibility chain for the Chars of N. - - function Current_Entity_In_Scope (N : Node_Id) return Entity_Id; - -- Find whether there is a previous definition for identifier N in the - -- current scope. Because declarations for a scope are not necessarily - -- contiguous (e.g. for packages) the first entry on the visibility chain - -- for N is not necessarily in the current scope. - - function Current_Scope return Entity_Id; - -- Get entity representing current scope - - function Current_Subprogram return Entity_Id; - -- Returns current enclosing subprogram. If Current_Scope is a subprogram, - -- then that is what is returned, otherwise the Enclosing_Subprogram of - -- the Current_Scope is returned. The returned value is Empty if this - -- is called from a library package which is not within any subprogram. - - function Defining_Entity (N : Node_Id) return Entity_Id; - -- Given a declaration N, returns the associated defining entity. If - -- the declaration has a specification, the entity is obtained from - -- the specification. If the declaration has a defining unit name, - -- then the defining entity is obtained from the defining unit name - -- ignoring any child unit prefixes. - - function Denotes_Discriminant - (N : Node_Id; - Check_Concurrent : Boolean := False) return Boolean; - -- Returns True if node N is an Entity_Name node for a discriminant. - -- If the flag Check_Concurrent is true, function also returns true - -- when N denotes the discriminal of the discriminant of a concurrent - -- type. This is necessary to disable some optimizations on private - -- components of protected types, and constraint checks on entry - -- families constrained by discriminants. - - function Denotes_Variable (N : Node_Id) return Boolean; - -- Returns True if node N denotes a single variable without parentheses - - function Depends_On_Discriminant (N : Node_Id) return Boolean; - -- Returns True if N denotes a discriminant or if N is a range, a subtype - -- indication or a scalar subtype where one of the bounds is a - -- discriminant. - - function Designate_Same_Unit - (Name1 : Node_Id; - Name2 : Node_Id) return Boolean; - -- Return true if Name1 and Name2 designate the same unit name; - -- each of these names is supposed to be a selected component name, - -- an expanded name, a defining program unit name or an identifier - - function Enclosing_Generic_Body - (N : Node_Id) return Node_Id; - -- Returns the Node_Id associated with the innermost enclosing - -- generic body, if any. If none, then returns Empty. - - function Enclosing_Generic_Unit - (N : Node_Id) return Node_Id; - -- Returns the Node_Id associated with the innermost enclosing - -- generic unit, if any. If none, then returns Empty. - - function Enclosing_Lib_Unit_Entity return Entity_Id; - -- Returns the entity of enclosing N_Compilation_Unit Node which is the - -- root of the current scope (which must not be Standard_Standard, and - -- the caller is responsible for ensuring this condition). - - function Enclosing_Lib_Unit_Node (N : Node_Id) return Node_Id; - -- Returns the enclosing N_Compilation_Unit Node that is the root - -- of a subtree containing N. - - function Enclosing_Subprogram (E : Entity_Id) return Entity_Id; - -- Utility function to return the Ada entity of the subprogram enclosing - -- the entity E, if any. Returns Empty if no enclosing subprogram. - - procedure Ensure_Freeze_Node (E : Entity_Id); - -- Make sure a freeze node is allocated for entity E. If necessary, - -- build and initialize a new freeze node and set Has_Delayed_Freeze - -- true for entity E. - - procedure Enter_Name (Def_Id : Entity_Id); - -- Insert new name in symbol table of current scope with check for - -- duplications (error message is issued if a conflict is found) - -- Note: Enter_Name is not used for overloadable entities, instead - -- these are entered using Sem_Ch6.Enter_Overloadable_Entity. - - procedure Explain_Limited_Type (T : Entity_Id; N : Node_Id); - -- This procedure is called after issuing a message complaining - -- about an inappropriate use of limited type T. If useful, it - -- adds additional continuation lines to the message explaining - -- why type T is limited. Messages are placed at node N. - - procedure Find_Actual - (N : Node_Id; - Formal : out Entity_Id; - Call : out Node_Id); - -- Determines if the node N is an actual parameter of a procedure call. If - -- so, then Formal points to the entity for the formal (whose Ekind is one - -- of E_In_Parameter, E_Out_Parameter, E_In_Out_Parameter) and Call is set - -- to the node for the corresponding call. If the node N is not an actual - -- parameter, or is an actual parameter of a function call, then Formal and - -- Call are set to Empty. - - function Find_Corresponding_Discriminant - (Id : Node_Id; - Typ : Entity_Id) return Entity_Id; - -- Because discriminants may have different names in a generic unit - -- and in an instance, they are resolved positionally when possible. - -- A reference to a discriminant carries the discriminant that it - -- denotes when analyzed. Subsequent uses of this id on a different - -- type denote the discriminant at the same position in this new type. - - function Find_Overlaid_Object (N : Node_Id) return Entity_Id; - -- The node N should be an address representation clause. This function - -- checks if the target expression is the address of some stand alone - -- object (variable or constant), and if so, returns its entity. If N is - -- not an address representation clause, or if it is not possible to - -- determine that the address is of this form, then Empty is returned. - - function Find_Parameter_Type (Param : Node_Id) return Entity_Id; - -- Return the type of formal parameter Param as determined by its - -- specification. - - function Find_Static_Alternative (N : Node_Id) return Node_Id; - -- N is a case statement whose expression is a compile-time value. - -- Determine the alternative chosen, so that the code of non-selected - -- alternatives, and the warnings that may apply to them, are removed. - - function First_Actual (Node : Node_Id) return Node_Id; - -- Node is an N_Function_Call or N_Procedure_Call_Statement node. The - -- result returned is the first actual parameter in declaration order - -- (not the order of parameters as they appeared in the source, which - -- can be quite different as a result of the use of named parameters). - -- Empty is returned for a call with no parameters. The procedure for - -- iterating through the actuals in declaration order is to use this - -- function to find the first actual, and then use Next_Actual to obtain - -- the next actual in declaration order. Note that the value returned - -- is always the expression (not the N_Parameter_Association nodes - -- even if named association is used). - - function Full_Qualified_Name (E : Entity_Id) return String_Id; - -- Generates the string literal corresponding to the E's full qualified - -- name in upper case. An ASCII.NUL is appended as the last character. - -- The names in the string are generated by Namet.Get_Decoded_Name_String. - - procedure Gather_Components - (Typ : Entity_Id; - Comp_List : Node_Id; - Governed_By : List_Id; - Into : Elist_Id; - Report_Errors : out Boolean); - -- The purpose of this procedure is to gather the valid components in a - -- record type according to the values of its discriminants, in order to - -- validate the components of a record aggregate. - -- - -- Typ is the type of the aggregate when its constrained discriminants - -- need to be collected, otherwise it is Empty. - -- - -- Comp_List is an N_Component_List node. - -- - -- Governed_By is a list of N_Component_Association nodes, where each - -- choice list contains the name of a discriminant and the expression - -- field gives its value. The values of the discriminants governing - -- the (possibly nested) variant parts in Comp_List are found in this - -- Component_Association List. - -- - -- Into is the list where the valid components are appended. Note that - -- Into need not be an Empty list. If it's not, components are attached - -- to its tail. - -- - -- Report_Errors is set to True if the values of the discriminants are - -- non-static. - -- - -- This procedure is also used when building a record subtype. If the - -- discriminant constraint of the subtype is static, the components of the - -- subtype are only those of the variants selected by the values of the - -- discriminants. Otherwise all components of the parent must be included - -- in the subtype for semantic analysis. - - function Get_Actual_Subtype (N : Node_Id) return Entity_Id; - -- Given a node for an expression, obtain the actual subtype of the - -- expression. In the case of a parameter where the formal is an - -- unconstrained array or discriminated type, this will be the - -- previously constructed subtype of the actual. Note that this is - -- not quite the "Actual Subtype" of the RM, since it is always - -- a constrained type, i.e. it is the subtype of the value of the - -- actual. The actual subtype is also returned in other cases where - -- it has already been constructed for an object. Otherwise the - -- expression type is returned unchanged, except for the case of an - -- unconstrained array type, where an actual subtype is created, using - -- Insert_Actions if necessary to insert any associated actions. - - function Get_Actual_Subtype_If_Available (N : Node_Id) return Entity_Id; - -- This is like Get_Actual_Subtype, except that it never constructs an - -- actual subtype. If an actual subtype is already available, i.e. the - -- Actual_Subtype field of the corresponding entity is set, then it is - -- returned. Otherwise the Etype of the node is returned. - - function Get_Default_External_Name (E : Node_Or_Entity_Id) return Node_Id; - -- This is used to construct the string literal node representing a - -- default external name, i.e. one that is constructed from the name - -- of an entity, or (in the case of extended DEC import/export pragmas, - -- an identifier provided as the external name. Letters in the name are - -- according to the setting of Opt.External_Name_Default_Casing. - - function Get_Generic_Entity (N : Node_Id) return Entity_Id; - -- Returns the true generic entity in an instantiation. If the name in - -- the instantiation is a renaming, the function returns the renamed - -- generic. - - procedure Get_Index_Bounds (N : Node_Id; L, H : out Node_Id); - -- This procedure assigns to L and H respectively the values of the - -- low and high bounds of node N, which must be a range, subtype - -- indication, or the name of a scalar subtype. The result in L, H - -- may be set to Error if there was an earlier error in the range. - - function Get_Enum_Lit_From_Pos - (T : Entity_Id; - Pos : Uint; - Loc : Source_Ptr) return Entity_Id; - -- This function obtains the E_Enumeration_Literal entity for the - -- specified value from the enumeration type or subtype T. The - -- second argument is the Pos value, which is assumed to be in range. - -- The third argument supplies a source location for constructed - -- nodes returned by this function. - - procedure Get_Library_Unit_Name_String (Decl_Node : Node_Id); - -- Retrieve the fully expanded name of the library unit declared by - -- Decl_Node into the name buffer. - - function Get_Name_Entity_Id (Id : Name_Id) return Entity_Id; - -- An entity value is associated with each name in the name table. The - -- Get_Name_Entity_Id function fetches the Entity_Id of this entity, - -- which is the innermost visible entity with the given name. See the - -- body of Sem_Ch8 for further details on handling of entity visibility. - - function Get_Pragma_Id (N : Node_Id) return Pragma_Id; - pragma Inline (Get_Pragma_Id); - -- Obtains the Pragma_Id from the Chars field of Pragma_Identifier (N) - - function Get_Referenced_Object (N : Node_Id) return Node_Id; - -- Given a node, return the renamed object if the node represents a renamed - -- object, otherwise return the node unchanged. The node may represent an - -- arbitrary expression. - - function Get_Renamed_Entity (E : Entity_Id) return Entity_Id; - -- Given an entity for an exception, package, subprogram or generic unit, - -- returns the ultimately renamed entity if this is a renaming. If this is - -- not a renamed entity, returns its argument. It is an error to call this - -- with any other kind of entity. - - function Get_Subprogram_Entity (Nod : Node_Id) return Entity_Id; - -- Nod is either a procedure call statement, or a function call, or - -- an accept statement node. This procedure finds the Entity_Id of the - -- related subprogram or entry and returns it, or if no subprogram can - -- be found, returns Empty. - - function Get_Subprogram_Body (E : Entity_Id) return Node_Id; - -- Given the entity for a subprogram (E_Function or E_Procedure), - -- return the corresponding N_Subprogram_Body node. If the corresponding - -- body of the declaration is missing (as for an imported subprogram) - -- return Empty. - - function Get_Task_Body_Procedure (E : Entity_Id) return Node_Id; - pragma Inline (Get_Task_Body_Procedure); - -- Given an entity for a task type or subtype, retrieves the - -- Task_Body_Procedure field from the corresponding task type - -- declaration. - - function Has_Access_Values (T : Entity_Id) return Boolean; - -- Returns true if type or subtype T is an access type, or has a component - -- (at any recursive level) that is an access type. This is a conservative - -- predicate, if it is not known whether or not T contains access values - -- (happens for generic formals in some cases), then False is returned. - -- Note that tagged types return False. Even though the tag is implemented - -- as an access type internally, this function tests only for access types - -- known to the programmer. See also Has_Tagged_Component. - - type Alignment_Result is (Known_Compatible, Unknown, Known_Incompatible); - -- Result of Has_Compatible_Alignment test, description found below. Note - -- that the values are arranged in increasing order of problematicness. - - function Has_Compatible_Alignment - (Obj : Entity_Id; - Expr : Node_Id) return Alignment_Result; - -- Obj is an object entity, and expr is a node for an object reference. If - -- the alignment of the object referenced by Expr is known to be compatible - -- with the alignment of Obj (i.e. is larger or the same), then the result - -- is Known_Compatible. If the alignment of the object referenced by Expr - -- is known to be less than the alignment of Obj, then Known_Incompatible - -- is returned. If neither condition can be reliably established at compile - -- time, then Unknown is returned. This is used to determine if alignment - -- checks are required for address clauses, and also whether copies must - -- be made when objects are passed by reference. - -- - -- Note: Known_Incompatible does not mean that at run time the alignment - -- of Expr is known to be wrong for Obj, just that it can be determined - -- that alignments have been explicitly or implicitly specified which - -- are incompatible (whereas Unknown means that even this is not known). - -- The appropriate reaction of a caller to Known_Incompatible is to treat - -- it as Unknown, but issue a warning that there may be an alignment error. - - function Has_Declarations (N : Node_Id) return Boolean; - -- Determines if the node can have declarations - - function Has_Discriminant_Dependent_Constraint - (Comp : Entity_Id) return Boolean; - -- Returns True if and only if Comp has a constrained subtype - -- that depends on a discriminant. - - function Has_Infinities (E : Entity_Id) return Boolean; - -- Determines if the range of the floating-point type E includes - -- infinities. Returns False if E is not a floating-point type. - - function Has_Interfaces - (T : Entity_Id; - Use_Full_View : Boolean := True) return Boolean; - -- Where T is a concurrent type or a record type, returns true if T covers - -- any abstract interface types. In case of private types the argument - -- Use_Full_View controls if the check is done using its full view (if - -- available). - - function Has_Null_Exclusion (N : Node_Id) return Boolean; - -- Determine whether node N has a null exclusion - - function Has_Overriding_Initialize (T : Entity_Id) return Boolean; - -- Predicate to determine whether a controlled type has a user-defined - -- Initialize primitive, which makes the type not preelaborable. - - function Has_Preelaborable_Initialization (E : Entity_Id) return Boolean; - -- Return True iff type E has preelaborable initialization as defined in - -- Ada 2005 (see AI-161 for details of the definition of this attribute). - - function Has_Private_Component (Type_Id : Entity_Id) return Boolean; - -- Check if a type has a (sub)component of a private type that has not - -- yet received a full declaration. - - function Has_Stream (T : Entity_Id) return Boolean; - -- Tests if type T is derived from Ada.Streams.Root_Stream_Type, or - -- in the case of a composite type, has a component for which this - -- predicate is True, and if so returns True. Otherwise a result of - -- False means that there is no Stream type in sight. For a private - -- type, the test is applied to the underlying type (or returns False - -- if there is no underlying type). - - function Has_Tagged_Component (Typ : Entity_Id) return Boolean; - -- Returns True if Typ is a composite type (array or record) which is - -- either itself a tagged type, or has a component (recursively) which is - -- a tagged type. Returns False for non-composite type, or if no tagged - -- component is present. This function is used to check if '=' has to be - -- expanded into a bunch component comparisons. - - function Implements_Interface - (Typ_Ent : Entity_Id; - Iface_Ent : Entity_Id; - Exclude_Parents : Boolean := False) return Boolean; - -- Returns true if the Typ implements interface Iface - - function In_Instance return Boolean; - -- Returns True if the current scope is within a generic instance - - function In_Instance_Body return Boolean; - -- Returns True if current scope is within the body of an instance, where - -- several semantic checks (e.g. accessibility checks) are relaxed. - - function In_Instance_Not_Visible return Boolean; - -- Returns True if current scope is with the private part or the body of - -- an instance. Other semantic checks are suppressed in this context. - - function In_Instance_Visible_Part return Boolean; - -- Returns True if current scope is within the visible part of a package - -- instance, where several additional semantic checks apply. - - function In_Package_Body return Boolean; - -- Returns True if current scope is within a package body - - function In_Parameter_Specification (N : Node_Id) return Boolean; - -- Returns True if node N belongs to a parameter specification - - function In_Subprogram_Or_Concurrent_Unit return Boolean; - -- Determines if the current scope is within a subprogram compilation - -- unit (inside a subprogram declaration, subprogram body, or generic - -- subprogram declaration) or within a task or protected body. The test - -- is for appearing anywhere within such a construct (that is it does not - -- need to be directly within). - - function In_Visible_Part (Scope_Id : Entity_Id) return Boolean; - -- Determine whether a declaration occurs within the visible part of a - -- package specification. The package must be on the scope stack, and the - -- corresponding private part must not. - - procedure Insert_Explicit_Dereference (N : Node_Id); - -- In a context that requires a composite or subprogram type and - -- where a prefix is an access type, rewrite the access type node - -- N (which is the prefix, e.g. of an indexed component) as an - -- explicit dereference. - - procedure Inspect_Deferred_Constant_Completion (Decls : List_Id); - -- Examine all deferred constants in the declaration list Decls and check - -- whether they have been completed by a full constant declaration or an - -- Import pragma. Emit the error message if that is not the case. - - function Is_AAMP_Float (E : Entity_Id) return Boolean; - -- Defined for all type entities. Returns True only for the base type - -- of float types with AAMP format. The particular format is determined - -- by the Digits_Value value which is 6 for the 32-bit floating point type, - -- or 9 for the 48-bit type. This is not an attribute function (like - -- VAX_Float) in order to not use up an extra flag and to prevent - -- the dependency of Einfo on Targparm which would be required for a - -- synthesized attribute. - - function Is_Actual_Parameter (N : Node_Id) return Boolean; - -- Determines if N is an actual parameter in a subprogram call - - function Is_Aliased_View (Obj : Node_Id) return Boolean; - -- Determine if Obj is an aliased view, i.e. the name of an - -- object to which 'Access or 'Unchecked_Access can apply. - - function Is_Ancestor_Package - (E1 : Entity_Id; - E2 : Entity_Id) return Boolean; - -- Determine whether package E1 is an ancestor of E2 - - function Is_Atomic_Object (N : Node_Id) return Boolean; - -- Determines if the given node denotes an atomic object in the sense - -- of the legality checks described in RM C.6(12). - - function Is_Coextension_Root (N : Node_Id) return Boolean; - -- Determine whether node N is an allocator which acts as a coextension - -- root. - - function Is_Controlling_Limited_Procedure - (Proc_Nam : Entity_Id) return Boolean; - -- Ada 2005 (AI-345): Determine whether Proc_Nam is a primitive procedure - -- of a limited interface with a controlling first parameter. - - function Is_Dependent_Component_Of_Mutable_Object - (Object : Node_Id) return Boolean; - -- Returns True if Object is the name of a subcomponent that - -- depends on discriminants of a variable whose nominal subtype - -- is unconstrained and not indefinite, and the variable is - -- not aliased. Otherwise returns False. The nodes passed - -- to this function are assumed to denote objects. - - function Is_Dereferenced (N : Node_Id) return Boolean; - -- N is a subexpression node of an access type. This function returns - -- true if N appears as the prefix of a node that does a dereference - -- of the access value (selected/indexed component, explicit dereference - -- or a slice), and false otherwise. - - function Is_Descendent_Of (T1 : Entity_Id; T2 : Entity_Id) return Boolean; - -- Returns True if type T1 is a descendent of type T2, and false otherwise. - -- This is the RM definition, a type is a descendent of another type if it - -- is the same type or is derived from a descendent of the other type. - - function Is_Concurrent_Interface (T : Entity_Id) return Boolean; - -- First determine whether type T is an interface and then check whether - -- it is of protected, synchronized or task kind. - - function Is_False (U : Uint) return Boolean; - -- The argument is a Uint value which is the Boolean'Pos value of a - -- Boolean operand (i.e. is either 0 for False, or 1 for True). This - -- function simply tests if it is False (i.e. zero) - - function Is_Fixed_Model_Number (U : Ureal; T : Entity_Id) return Boolean; - -- Returns True iff the number U is a model number of the fixed- - -- point type T, i.e. if it is an exact multiple of Small. - - function Is_Fully_Initialized_Type (Typ : Entity_Id) return Boolean; - -- Typ is a type entity. This function returns true if this type is - -- fully initialized, meaning that an object of the type is fully - -- initialized. Note that initialization resulting from the use of - -- pragma Normalized_Scalars does not count. Note that this is only - -- used for the purpose of issuing warnings for objects that are - -- potentially referenced uninitialized. This means that the result - -- returned is not crucial, but probably should err on the side of - -- thinking things are fully initialized if it does not know. - - function Is_Inherited_Operation (E : Entity_Id) return Boolean; - -- E is a subprogram. Return True is E is an implicit operation inherited - -- by a derived type declarations. - - function Is_Library_Level_Entity (E : Entity_Id) return Boolean; - -- A library-level declaration is one that is accessible from Standard, - -- i.e. a library unit or an entity declared in a library package. - - function Is_Local_Variable_Reference (Expr : Node_Id) return Boolean; - -- Determines whether Expr is a reference to a variable or IN OUT - -- mode parameter of the current enclosing subprogram. - -- Why are OUT parameters not considered here ??? - - function Is_Object_Reference (N : Node_Id) return Boolean; - -- Determines if the tree referenced by N represents an object. Both - -- variable and constant objects return True (compare Is_Variable). - - function Is_OK_Variable_For_Out_Formal (AV : Node_Id) return Boolean; - -- Used to test if AV is an acceptable formal for an OUT or IN OUT - -- formal. Note that the Is_Variable function is not quite the right - -- test because this is a case in which conversions whose expression - -- is a variable (in the Is_Variable sense) with a non-tagged type - -- target are considered view conversions and hence variables. - - function Is_Partially_Initialized_Type (Typ : Entity_Id) return Boolean; - -- Typ is a type entity. This function returns true if this type is - -- partly initialized, meaning that an object of the type is at least - -- partly initialized (in particular in the record case, that at least - -- one component has an initialization expression). Note that - -- initialization resulting from the use of pragma Normalized_Scalars does - -- not count. - - function Is_Potentially_Persistent_Type (T : Entity_Id) return Boolean; - -- Determines if type T is a potentially persistent type. A potentially - -- persistent type is defined (recursively) as a scalar type, a non-tagged - -- record whose components are all of a potentially persistent type, or an - -- array with all static constraints whose component type is potentially - -- persistent. A private type is potentially persistent if the full type - -- is potentially persistent. - - function Is_Protected_Self_Reference (N : Node_Id) return Boolean; - -- Return True if node N denotes a protected type name which represents - -- the current instance of a protected object according to RM 9.4(21/2). - - function Is_RCI_Pkg_Spec_Or_Body (Cunit : Node_Id) return Boolean; - -- Return True if a compilation unit is the specification or the - -- body of a remote call interface package. - - function Is_Remote_Access_To_Class_Wide_Type (E : Entity_Id) return Boolean; - -- Return True if E is a remote access-to-class-wide type - - function Is_Remote_Access_To_Subprogram_Type (E : Entity_Id) return Boolean; - -- Return True if E is a remote access to subprogram type - - function Is_Remote_Call (N : Node_Id) return Boolean; - -- Return True if N denotes a potentially remote call - - function Is_Renamed_Entry (Proc_Nam : Entity_Id) return Boolean; - -- Return True if Proc_Nam is a procedure renaming of an entry - - function Is_Selector_Name (N : Node_Id) return Boolean; - -- Given an N_Identifier node N, determines if it is a Selector_Name. - -- As described in Sinfo, Selector_Names are special because they - -- represent use of the N_Identifier node for a true identifier, when - -- normally such nodes represent a direct name. - - function Is_Statement (N : Node_Id) return Boolean; - -- Check if the node N is a statement node. Note that this includes - -- the case of procedure call statements (unlike the direct use of - -- the N_Statement_Other_Than_Procedure_Call subtype from Sinfo). - -- Note that a label is *not* a statement, and will return False. - - function Is_Synchronized_Tagged_Type (E : Entity_Id) return Boolean; - -- Returns True if E is a synchronized tagged type (AARM 3.9.4 (6/2)) - - function Is_Transfer (N : Node_Id) return Boolean; - -- Returns True if the node N is a statement which is known to cause - -- an unconditional transfer of control at runtime, i.e. the following - -- statement definitely will not be executed. - - function Is_True (U : Uint) return Boolean; - -- The argument is a Uint value which is the Boolean'Pos value of a - -- Boolean operand (i.e. is either 0 for False, or 1 for True). This - -- function simply tests if it is True (i.e. non-zero) - - function Is_Value_Type (T : Entity_Id) return Boolean; - -- Returns true if type T represents a value type. This is only relevant to - -- CIL, will always return false for other targets. - -- What is a "value type", since this is not an Ada term, it should be - -- defined here ??? - - function Is_Variable (N : Node_Id) return Boolean; - -- Determines if the tree referenced by N represents a variable, i.e. - -- can appear on the left side of an assignment. There is one situation, - -- namely formal parameters, in which non-tagged type conversions are - -- also considered variables, but Is_Variable returns False for such - -- cases, since it has no knowledge of the context. Note that this is - -- the point at which Assignment_OK is checked, and True is returned - -- for any tree thus marked. - - function Is_Volatile_Object (N : Node_Id) return Boolean; - -- Determines if the given node denotes an volatile object in the sense - -- of the legality checks described in RM C.6(12). Note that the test - -- here is for something actually declared as volatile, not for an object - -- that gets treated as volatile (see Einfo.Treat_As_Volatile). - - procedure Kill_Current_Values (Last_Assignment_Only : Boolean := False); - -- This procedure is called to clear all constant indications from all - -- entities in the current scope and in any parent scopes if the current - -- scope is a block or a package (and that recursion continues to the top - -- scope that is not a block or a package). This is used when the - -- sequential flow-of-control assumption is violated (occurrence of a - -- label, head of a loop, or start of an exception handler). The effect of - -- the call is to clear the Constant_Value field (but we do not need to - -- clear the Is_True_Constant flag, since that only gets reset if there - -- really is an assignment somewhere in the entity scope). This procedure - -- also calls Kill_All_Checks, since this is a special case of needing to - -- forget saved values. This procedure also clears Is_Known_Non_Null flags - -- in variables, constants or parameters since these are also not known to - -- be valid. - -- - -- The Last_Assignment_Only flag is set True to clear only Last_Assignment - -- fields and leave other fields unchanged. This is used when we encounter - -- an unconditional flow of control change (return, goto, raise). In such - -- cases we don't need to clear the current values, since it may be that - -- the flow of control change occurs in a conditional context, and if it - -- is not taken, then it is just fine to keep the current values. But the - -- Last_Assignment field is different, if we have a sequence assign-to-v, - -- conditional-return, assign-to-v, we do not want to complain that the - -- second assignment clobbers the first. - - procedure Kill_Current_Values - (Ent : Entity_Id; - Last_Assignment_Only : Boolean := False); - -- This performs the same processing as described above for the form with - -- no argument, but for the specific entity given. The call has no effect - -- if the entity Ent is not for an object. Again, Last_Assignment_Only is - -- set if you want to clear only the Last_Assignment field (see above). - - procedure Kill_Size_Check_Code (E : Entity_Id); - -- Called when an address clause or pragma Import is applied to an entity. - -- If the entity is a variable or a constant, and size check code is - -- present, this size check code is killed, since the object will not - -- be allocated by the program. - - function Known_To_Be_Assigned (N : Node_Id) return Boolean; - -- The node N is an entity reference. This function determines whether the - -- reference is for sure an assignment of the entity, returning True if - -- so. This differs from May_Be_Lvalue in that it defaults in the other - -- direction. Cases which may possibly be assignments but are not known to - -- be may return True from May_Be_Lvalue, but False from this function. - - function Make_Simple_Return_Statement - (Sloc : Source_Ptr; - Expression : Node_Id := Empty) return Node_Id - renames Make_Return_Statement; - -- See Sinfo. We rename Make_Return_Statement to the correct Ada 2005 - -- terminology here. Clients should use Make_Simple_Return_Statement. - - Make_Return_Statement : constant := -2 ** 33; - -- Attempt to prevent accidental uses of Make_Return_Statement. If this - -- and the one in Nmake are both potentially use-visible, it will cause - -- a compilation error. Note that type and value are irrelevant. - - N_Return_Statement : constant := -2**33; - -- Attempt to prevent accidental uses of N_Return_Statement; similar to - -- Make_Return_Statement above. - - procedure Mark_Coextensions (Context_Nod : Node_Id; Root_Nod : Node_Id); - -- Given a node which designates the context of analysis and an origin in - -- the tree, traverse from Root_Nod and mark all allocators as either - -- dynamic or static depending on Context_Nod. Any erroneous marking is - -- cleaned up during resolution. - - function May_Be_Lvalue (N : Node_Id) return Boolean; - -- Determines if N could be an lvalue (e.g. an assignment left hand side). - -- An lvalue is defined as any expression which appears in a context where - -- a name is required by the syntax, and the identity, rather than merely - -- the value of the node is needed (for example, the prefix of an Access - -- attribute is in this category). Note that, as implied by the name, this - -- test is conservative. If it cannot be sure that N is NOT an lvalue, then - -- it returns True. It tries hard to get the answer right, but it is hard - -- to guarantee this in all cases. Note that it is more possible to give - -- correct answer if the tree is fully analyzed. - - function Needs_One_Actual (E : Entity_Id) return Boolean; - -- Returns True if a function has defaults for all but its first - -- formal. Used in Ada 2005 mode to solve the syntactic ambiguity that - -- results from an indexing of a function call written in prefix form. - - function New_External_Entity - (Kind : Entity_Kind; - Scope_Id : Entity_Id; - Sloc_Value : Source_Ptr; - Related_Id : Entity_Id; - Suffix : Character; - Suffix_Index : Nat := 0; - Prefix : Character := ' ') return Entity_Id; - -- This function creates an N_Defining_Identifier node for an internal - -- created entity, such as an implicit type or subtype, or a record - -- initialization procedure. The entity name is constructed with a call - -- to New_External_Name (Related_Id, Suffix, Suffix_Index, Prefix), so - -- that the generated name may be referenced as a public entry, and the - -- Is_Public flag is set if needed (using Set_Public_Status). If the - -- entity is for a type or subtype, the size/align fields are initialized - -- to unknown (Uint_0). - - function New_Internal_Entity - (Kind : Entity_Kind; - Scope_Id : Entity_Id; - Sloc_Value : Source_Ptr; - Id_Char : Character) return Entity_Id; - -- This function is similar to New_External_Entity, except that the - -- name is constructed by New_Internal_Name (Id_Char). This is used - -- when the resulting entity does not have to be referenced as a - -- public entity (and in this case Is_Public is not set). - - procedure Next_Actual (Actual_Id : in out Node_Id); - pragma Inline (Next_Actual); - -- Next_Actual (N) is equivalent to N := Next_Actual (N) - - function Next_Actual (Actual_Id : Node_Id) return Node_Id; - -- Find next actual parameter in declaration order. As described for - -- First_Actual, this is the next actual in the declaration order, not - -- the call order, so this does not correspond to simply taking the - -- next entry of the Parameter_Associations list. The argument is an - -- actual previously returned by a call to First_Actual or Next_Actual. - -- Note that the result produced is always an expression, not a parameter - -- association node, even if named notation was used. - - procedure Normalize_Actuals - (N : Node_Id; - S : Entity_Id; - Report : Boolean; - Success : out Boolean); - -- Reorders lists of actuals according to names of formals, value returned - -- in Success indicates success of reordering. For more details, see body. - -- Errors are reported only if Report is set to True. - - procedure Note_Possible_Modification (N : Node_Id; Sure : Boolean); - -- This routine is called if the sub-expression N maybe the target of - -- an assignment (e.g. it is the left side of an assignment, used as - -- an out parameters, or used as prefixes of access attributes). It - -- sets May_Be_Modified in the associated entity if there is one, - -- taking into account the rule that in the case of renamed objects, - -- it is the flag in the renamed object that must be set. - -- - -- The parameter Sure is set True if the modification is sure to occur - -- (e.g. target of assignment, or out parameter), and to False if the - -- modification is only potential (e.g. address of entity taken). - - function Object_Access_Level (Obj : Node_Id) return Uint; - -- Return the accessibility level of the view of the object Obj. - -- For convenience, qualified expressions applied to object names - -- are also allowed as actuals for this function. - - function Primitive_Names_Match (E1, E2 : Entity_Id) return Boolean; - -- Returns True if the names of both entities correspond with matching - -- primitives. This routine includes support for the case in which one - -- or both entities correspond with entities built by Derive_Subprogram - -- with a special name to avoid being overridden (i.e. return true in case - -- of entities with names "nameP" and "name" or vice versa). - - function Private_Component (Type_Id : Entity_Id) return Entity_Id; - -- Returns some private component (if any) of the given Type_Id. - -- Used to enforce the rules on visibility of operations on composite - -- types, that depend on the full view of the component type. For a - -- record type there may be several such components, we just return - -- the first one. - - procedure Process_End_Label - (N : Node_Id; - Typ : Character; - Ent : Entity_Id); - -- N is a node whose End_Label is to be processed, generating all - -- appropriate cross-reference entries, and performing style checks - -- for any identifier references in the end label. Typ is either - -- 'e' or 't indicating the type of the cross-reference entity - -- (e for spec, t for body, see Lib.Xref spec for details). The - -- parameter Ent gives the entity to which the End_Label refers, - -- and to which cross-references are to be generated. - - function Real_Convert (S : String) return Node_Id; - -- S is a possibly signed syntactically valid real literal. The result - -- returned is an N_Real_Literal node representing the literal value. - - procedure Remove_Homonym (E : Entity_Id); - -- Removes E from the homonym chain - - function Rep_To_Pos_Flag (E : Entity_Id; Loc : Source_Ptr) return Node_Id; - -- This is used to construct the second argument in a call to Rep_To_Pos - -- which is Standard_True if range checks are enabled (E is an entity to - -- which the Range_Checks_Suppressed test is applied), and Standard_False - -- if range checks are suppressed. Loc is the location for the node that - -- is returned (which is a New_Occurrence of the appropriate entity). - -- - -- Note: one might think that it would be fine to always use True and - -- to ignore the suppress in this case, but it is generally better to - -- believe a request to suppress exceptions if possible, and further - -- more there is at least one case in the generated code (the code for - -- array assignment in a loop) that depends on this suppression. - - procedure Require_Entity (N : Node_Id); - -- N is a node which should have an entity value if it is an entity name. - -- If not, then check if there were previous errors. If so, just fill - -- in with Any_Id and ignore. Otherwise signal a program error exception. - -- This is used as a defense mechanism against ill-formed trees caused by - -- previous errors (particularly in -gnatq mode). - - function Requires_Transient_Scope (Id : Entity_Id) return Boolean; - -- E is a type entity. The result is True when temporaries of this - -- type need to be wrapped in a transient scope to be reclaimed - -- properly when a secondary stack is in use. Examples of types - -- requiring such wrapping are controlled types and variable-sized - -- types including unconstrained arrays - - procedure Reset_Analyzed_Flags (N : Node_Id); - -- Reset the Analyzed flags in all nodes of the tree whose root is N - - function Safe_To_Capture_Value - (N : Node_Id; - Ent : Entity_Id; - Cond : Boolean := False) return Boolean; - -- The caller is interested in capturing a value (either the current value, - -- or an indication that the value is non-null) for the given entity Ent. - -- This value can only be captured if sequential execution semantics can be - -- properly guaranteed so that a subsequent reference will indeed be sure - -- that this current value indication is correct. The node N is the - -- construct which resulted in the possible capture of the value (this - -- is used to check if we are in a conditional). - -- - -- Cond is used to skip the test for being inside a conditional. It is used - -- in the case of capturing values from if/while tests, which already do a - -- proper job of handling scoping issues without this help. - -- - -- The only entities whose values can be captured are OUT and IN OUT formal - -- parameters, and variables unless Cond is True, in which case we also - -- allow IN formals, loop parameters and constants, where we cannot ever - -- capture actual value information, but we can capture conditional tests. - - function Same_Name (N1, N2 : Node_Id) return Boolean; - -- Determine if two (possibly expanded) names are the same name. This is - -- a purely syntactic test, and N1 and N2 need not be analyzed. - - function Same_Object (Node1, Node2 : Node_Id) return Boolean; - -- Determine if Node1 and Node2 are known to designate the same object. - -- This is a semantic test and both nodes must be fully analyzed. A result - -- of True is decisively correct. A result of False does not necessarily - -- mean that different objects are designated, just that this could not - -- be reliably determined at compile time. - - function Same_Type (T1, T2 : Entity_Id) return Boolean; - -- Determines if T1 and T2 represent exactly the same type. Two types - -- are the same if they are identical, or if one is an unconstrained - -- subtype of the other, or they are both common subtypes of the same - -- type with identical constraints. The result returned is conservative. - -- It is True if the types are known to be the same, but a result of - -- False is indecisive (e.g. the compiler may not be able to tell that - -- two constraints are identical). - - function Same_Value (Node1, Node2 : Node_Id) return Boolean; - -- Determines if Node1 and Node2 are known to be the same value, which is - -- true if they are both compile time known values and have the same value, - -- or if they are the same object (in the sense of function Same_Object). - -- A result of False does not necessarily mean they have different values, - -- just that it is not possible to determine they have the same value. - - function Scope_Within_Or_Same (Scope1, Scope2 : Entity_Id) return Boolean; - -- Determines if the entity Scope1 is the same as Scope2, or if it is - -- inside it, where both entities represent scopes. Note that scopes - -- are only partially ordered, so Scope_Within_Or_Same (A,B) and - -- Scope_Within_Or_Same (B,A) can both be False for a given pair A,B. - - function Scope_Within (Scope1, Scope2 : Entity_Id) return Boolean; - -- Like Scope_Within_Or_Same, except that this function returns - -- False in the case where Scope1 and Scope2 are the same scope. - - procedure Set_Convention (E : Entity_Id; Val : Convention_Id); - -- Same as Basic_Set_Convention, but with an extra check for access types. - -- In particular, if E is an access-to-subprogram type, and Val is a - -- foreign convention, then we set Can_Use_Internal_Rep to False on E. - - procedure Set_Current_Entity (E : Entity_Id); - -- Establish the entity E as the currently visible definition of its - -- associated name (i.e. the Node_Id associated with its name) - - procedure Set_Debug_Info_Needed (T : Entity_Id); - -- Sets the Debug_Info_Needed flag on entity T , and also on any entities - -- that are needed by T (for an object, the type of the object is needed, - -- and for a type, various subsidiary types are needed -- see body for - -- details). Never has any effect on T if the Debug_Info_Off flag is set. - -- This routine should always be used instead of Set_Needs_Debug_Info to - -- ensure that subsidiary entities are properly handled. - - procedure Set_Entity_With_Style_Check (N : Node_Id; Val : Entity_Id); - -- This procedure has the same calling sequence as Set_Entity, but - -- if Style_Check is set, then it calls a style checking routine which - -- can check identifier spelling style. - - procedure Set_Name_Entity_Id (Id : Name_Id; Val : Entity_Id); - -- Sets the Entity_Id value associated with the given name, which is the - -- Id of the innermost visible entity with the given name. See the body - -- of package Sem_Ch8 for further details on the handling of visibility. - - procedure Set_Next_Actual (Ass1_Id : Node_Id; Ass2_Id : Node_Id); - -- The arguments may be parameter associations, whose descendants - -- are the optional formal name and the actual parameter. Positional - -- parameters are already members of a list, and do not need to be - -- chained separately. See also First_Actual and Next_Actual. - - procedure Set_Optimize_Alignment_Flags (E : Entity_Id); - pragma Inline (Set_Optimize_Alignment_Flags); - -- Sets Optimize_Alignment_Space/Time flags in E from current settings - - procedure Set_Public_Status (Id : Entity_Id); - -- If an entity (visible or otherwise) is defined in a library - -- package, or a package that is itself public, then this subprogram - -- labels the entity public as well. - - procedure Set_Referenced_Modified (N : Node_Id; Out_Param : Boolean); - -- N is the node for either a left hand side (Out_Param set to False), - -- or an Out or In_Out parameter (Out_Param set to True). If there is - -- an assignable entity being referenced, then the appropriate flag - -- (Referenced_As_LHS if Out_Param is False, Referenced_As_Out_Parameter - -- if Out_Param is True) is set True, and the other flag set False. - - procedure Set_Scope_Is_Transient (V : Boolean := True); - -- Set the flag Is_Transient of the current scope - - procedure Set_Size_Info (T1, T2 : Entity_Id); - -- Copies the Esize field and Has_Biased_Representation flag from sub(type) - -- entity T2 to (sub)type entity T1. Also copies the Is_Unsigned_Type flag - -- in the fixed-point and discrete cases, and also copies the alignment - -- value from T2 to T1. It does NOT copy the RM_Size field, which must be - -- separately set if this is required to be copied also. - - function Scope_Is_Transient return Boolean; - -- True if the current scope is transient - - function Static_Integer (N : Node_Id) return Uint; - -- This function analyzes the given expression node and then resolves it - -- as any integer type. If the result is static, then the value of the - -- universal expression is returned, otherwise an error message is output - -- and a value of No_Uint is returned. - - function Statically_Different (E1, E2 : Node_Id) return Boolean; - -- Return True if it can be statically determined that the Expressions - -- E1 and E2 refer to different objects - - function Subprogram_Access_Level (Subp : Entity_Id) return Uint; - -- Return the accessibility level of the view denoted by Subp - - procedure Trace_Scope (N : Node_Id; E : Entity_Id; Msg : String); - -- Print debugging information on entry to each unit being analyzed - - procedure Transfer_Entities (From : Entity_Id; To : Entity_Id); - -- Move a list of entities from one scope to another, and recompute - -- Is_Public based upon the new scope. - - function Type_Access_Level (Typ : Entity_Id) return Uint; - -- Return the accessibility level of Typ - - function Ultimate_Alias (Prim : Entity_Id) return Entity_Id; - -- Return the last entity in the chain of aliased entities of Prim. - -- If Prim has no alias return Prim. - - function Unit_Declaration_Node (Unit_Id : Entity_Id) return Node_Id; - -- Unit_Id is the simple name of a program unit, this function returns the - -- corresponding xxx_Declaration node for the entity. Also applies to the - -- body entities for subprograms, tasks and protected units, in which case - -- it returns the subprogram, task or protected body node for it. The unit - -- may be a child unit with any number of ancestors. - - function Universal_Interpretation (Opnd : Node_Id) return Entity_Id; - -- Yields universal_Integer or Universal_Real if this is a candidate - - function Unqualify (Expr : Node_Id) return Node_Id; - -- Removes any qualifications from Expr. For example, for T1'(T2'(X)), - -- this returns X. If Expr is not a qualified expression, returns Expr. - - function Within_Init_Proc return Boolean; - -- Determines if Current_Scope is within an init proc - - procedure Wrong_Type (Expr : Node_Id; Expected_Type : Entity_Id); - -- Output error message for incorrectly typed expression. Expr is the - -- node for the incorrectly typed construct (Etype (Expr) is the type - -- found), and Expected_Type is the entity for the expected type. Note - -- that Expr does not have to be a subexpression, anything with an - -- Etype field may be used. - -private - pragma Inline (Current_Entity); - pragma Inline (Get_Name_Entity_Id); - pragma Inline (Is_False); - pragma Inline (Is_Statement); - pragma Inline (Is_True); - pragma Inline (Set_Current_Entity); - pragma Inline (Set_Name_Entity_Id); - pragma Inline (Set_Size_Info); - pragma Inline (Unqualify); - -end Sem_Util; |