-- --
-- S p e c --
-- --
--- Copyright (C) 1992-2008, Free Software Foundation, Inc. --
+-- Copyright (C) 1992-2011, 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- --
package Sem_Ch3 is
procedure Analyze_Component_Declaration (N : Node_Id);
+ procedure Analyze_Full_Type_Declaration (N : Node_Id);
procedure Analyze_Incomplete_Type_Decl (N : Node_Id);
procedure Analyze_Itype_Reference (N : Node_Id);
procedure Analyze_Number_Declaration (N : Node_Id);
procedure Analyze_Others_Choice (N : Node_Id);
procedure Analyze_Private_Extension_Declaration (N : Node_Id);
procedure Analyze_Subtype_Indication (N : Node_Id);
- procedure Analyze_Type_Declaration (N : Node_Id);
procedure Analyze_Variant_Part (N : Node_Id);
procedure Analyze_Subtype_Declaration
-- the signature of the implicit type works like the profile of a regular
-- subprogram.
+ procedure Add_Internal_Interface_Entities (Tagged_Type : Entity_Id);
+ -- Add to the list of primitives of Tagged_Type the internal entities
+ -- associated with covered interface primitives. These entities link the
+ -- interface primitives with the tagged type primitives that cover them.
+
procedure Analyze_Declarations (L : List_Id);
-- Called to analyze a list of declarations (in what context ???). Also
-- performs necessary freezing actions (more description needed ???)
procedure Access_Type_Declaration (T : Entity_Id; Def : Node_Id);
-- Process an access type declaration
+ procedure Build_Itype_Reference (Ityp : Entity_Id; Nod : Node_Id);
+ -- Create a reference to an internal type, for use by Gigi. The back-end
+ -- elaborates itypes on demand, i.e. when their first use is seen. This can
+ -- lead to scope anomalies if the first use is within a scope that is
+ -- nested within the scope that contains the point of definition of the
+ -- itype. The Itype_Reference node forces the elaboration of the itype
+ -- in the proper scope. The node is inserted after Nod, which is the
+ -- enclosing declaration that generated Ityp.
+ --
+ -- A related mechanism is used during expansion, for itypes created in
+ -- branches of conditionals. See Ensure_Defined in exp_util.
+ -- Could both mechanisms be merged ???
+
procedure Check_Abstract_Overriding (T : Entity_Id);
- -- Check that all abstract subprograms inherited from T's parent type
- -- have been overridden as required, and that nonabstract subprograms
- -- have not been incorrectly overridden with an abstract subprogram.
+ -- Check that all abstract subprograms inherited from T's parent type have
+ -- been overridden as required, and that nonabstract subprograms have not
+ -- been incorrectly overridden with an abstract subprogram.
procedure Check_Aliased_Component_Types (T : Entity_Id);
-- Given an array type or record type T, check that if the type is
- -- nonlimited, then the nominal subtype of any components of T
- -- that have discriminants must be constrained.
+ -- nonlimited, then the nominal subtype of any components of T that
+ -- have discriminants must be constrained.
procedure Check_Completion (Body_Id : Node_Id := Empty);
- -- At the end of a declarative part, verify that all entities that
- -- require completion have received one. If Body_Id is absent, the
- -- error indicating a missing completion is placed on the declaration
- -- that needs completion. If Body_Id is present, it is the defining
- -- identifier of a package body, and errors are posted on that node,
- -- rather than on the declarations that require completion in the package
- -- declaration.
+ -- At the end of a declarative part, verify that all entities that require
+ -- completion have received one. If Body_Id is absent, the error indicating
+ -- a missing completion is placed on the declaration that needs completion.
+ -- If Body_Id is present, it is the defining identifier of a package body,
+ -- and errors are posted on that node, rather than on the declarations that
+ -- require completion in the package declaration.
+
+ procedure Check_CPP_Type (T : Entity_Id);
+ -- Check that components of imported CPP type T do not have default
+ -- expressions because the constructor (if any) is on the C++ side.
procedure Derive_Subprogram
(New_Subp : in out Entity_Id;
-- the derived subprograms are aliased to those of the actual, not those of
-- the ancestor.
--
- -- Note: one might expect this to be private to the package body, but
- -- there is one rather unusual usage in package Exp_Dist.
+ -- Note: one might expect this to be private to the package body, but there
+ -- is one rather unusual usage in package Exp_Dist.
function Find_Hidden_Interface
(Src : Elist_Id;
function Find_Type_Name (N : Node_Id) return Entity_Id;
-- Enter the identifier in a type definition, or find the entity already
-- declared, in the case of the full declaration of an incomplete or
- -- private type.
+ -- private type. If the previous declaration is tagged then the class-wide
+ -- entity is propagated to the identifier to prevent multiple incompatible
+ -- class-wide types that may be created for self-referential anonymous
+ -- access components.
function Get_Discriminant_Value
(Discriminant : Entity_Id;
Typ_For_Constraint : Entity_Id;
Constraint : Elist_Id) return Node_Id;
-- ??? MORE DOCUMENTATION
- -- Given a discriminant somewhere in the Typ_For_Constraint tree
- -- and a Constraint, return the value of that discriminant.
+ -- Given a discriminant somewhere in the Typ_For_Constraint tree and a
+ -- Constraint, return the value of that discriminant.
+
+ function Is_Constant_Bound (Exp : Node_Id) return Boolean;
+ -- Exp is the expression for an array bound. Determines whether the
+ -- bound is a compile-time known value, or a constant entity, or an
+ -- enumeration literal, or an expression composed of constant-bound
+ -- subexpressions which are evaluated by means of standard operators.
function Is_Null_Extension (T : Entity_Id) return Boolean;
-- Returns True if the tagged type T has an N_Full_Type_Declaration that
(I : Node_Id;
Related_Nod : Node_Id;
Related_Id : Entity_Id := Empty;
- Suffix_Index : Nat := 1);
+ Suffix_Index : Nat := 1;
+ In_Iter_Schm : Boolean := False);
-- Process an index that is given in an array declaration, an entry
-- family declaration or a loop iteration. The index is given by an
-- index declaration (a 'box'), or by a discrete range. The later can
-- be the name of a discrete type, or a subtype indication.
--
-- Related_Nod is the node where the potential generated implicit types
- -- will be inserted. The 2 last parameters are used for creating the name.
+ -- will be inserted. The next last parameters are used for creating the
+ -- name. In_Iter_Schm is True if Make_Index is called on the discrete
+ -- subtype definition in an iteration scheme.
procedure Make_Class_Wide_Type (T : Entity_Id);
-- A Class_Wide_Type is created for each tagged type definition. The
- -- attributes of a class wide type are inherited from those of the type T.
+ -- attributes of a class-wide type are inherited from those of the type T.
-- If T is introduced by a private declaration, the corresponding class
-- wide type is created at the same time, and therefore there is a private
- -- and a full declaration for the class wide type as well.
-
- function OK_For_Limited_Init_In_05 (Exp : Node_Id) return Boolean;
- -- Presuming Exp is an expression of an inherently limited type, returns
- -- True if the expression is allowed in an initialization context by the
- -- rules of Ada 2005. We use the rule in RM-7.5(2.1/2), "...it is an
- -- aggregate, a function_call, or a parenthesized expression or
- -- qualified_expression whose operand is permitted...". Note that in Ada
- -- 95 mode, we sometimes wish to give warnings based on whether the
- -- program _would_ be legal in Ada 2005. Note that Exp must already have
- -- been resolved, so we can know whether it's a function call (as opposed
- -- to an indexed component, for example).
-
- function OK_For_Limited_Init (Exp : Node_Id) return Boolean;
+ -- and a full declaration for the class-wide type as well.
+
+ function OK_For_Limited_Init_In_05
+ (Typ : Entity_Id;
+ Exp : Node_Id) return Boolean;
+ -- Presuming Exp is an expression of an inherently limited type Typ,
+ -- returns True if the expression is allowed in an initialization context
+ -- by the rules of Ada 2005. We use the rule in RM-7.5(2.1/2), "...it is an
+ -- aggregate, a function_call, or a parenthesized expression or qualified
+ -- expression whose operand is permitted...". Note that in Ada 95 mode,
+ -- we sometimes wish to give warnings based on whether the program _would_
+ -- be legal in Ada 2005. Note that Exp must already have been resolved,
+ -- so we can know whether it's a function call (as opposed to an indexed
+ -- component, for example). In the case where Typ is a limited interface's
+ -- class-wide type, then the expression is allowed to be of any kind if its
+ -- type is a nonlimited descendant of the interface.
+
+ function OK_For_Limited_Init
+ (Typ : Entity_Id;
+ Exp : Node_Id) return Boolean;
-- Always False in Ada 95 mode. Equivalent to OK_For_Limited_Init_In_05 in
-- Ada 2005 mode.
-- In_Default_Expression flag. See the documentation section entitled
-- "Handling of Default and Per-Object Expressions" in sem.ads for full
-- details. N is the expression to be analyzed, T is the expected type.
+ -- This mechanism is also used for aspect specifications that have an
+ -- expression parameter that needs similar preanalysis.
procedure Process_Full_View (N : Node_Id; Full_T, Priv_T : Entity_Id);
-- Process some semantic actions when the full view of a private type is
-- of the dependant private subtypes. The second action is to recopy the
-- primitive operations of the private view (in the tagged case).
-- N is the N_Full_Type_Declaration node.
-
+ --
-- Full_T is the full view of the type whose full declaration is in N.
--
-- Priv_T is the private view of the type whose full declaration is in N.
procedure Process_Range_Expr_In_Decl
- (R : Node_Id;
- T : Entity_Id;
- Check_List : List_Id := Empty_List;
- R_Check_Off : Boolean := False);
+ (R : Node_Id;
+ T : Entity_Id;
+ Check_List : List_Id := Empty_List;
+ R_Check_Off : Boolean := False;
+ In_Iter_Schm : Boolean := False);
-- Process a range expression that appears in a declaration context. The
- -- range is analyzed and resolved with the base type of the given type,
- -- and an appropriate check for expressions in non-static contexts made
- -- on the bounds. R is analyzed and resolved using T, so the caller should
- -- if necessary link R into the tree before the call, and in particular in
- -- the case of a subtype declaration, it is appropriate to set the parent
- -- pointer of R so that the types get properly frozen. The Check_List
- -- parameter is used when the subprogram is called from
- -- Build_Record_Init_Proc and is used to return a set of constraint
- -- checking statements generated by the Checks package. R_Check_Off is set
- -- to True when the call to Range_Check is to be skipped.
+ -- range is analyzed and resolved with the base type of the given type, and
+ -- an appropriate check for expressions in non-static contexts made on the
+ -- bounds. R is analyzed and resolved using T, so the caller should if
+ -- necessary link R into the tree before the call, and in particular in the
+ -- case of a subtype declaration, it is appropriate to set the parent
+ -- pointer of R so that the types get properly frozen. Check_List is used
+ -- when the subprogram is called from Build_Record_Init_Proc and is used to
+ -- return a set of constraint checking statements generated by the Checks
+ -- package. R_Check_Off is set to True when the call to Range_Check is to
+ -- be skipped. In_Iter_Schm is True if Process_Range_Expr_In_Decl is called
+ -- on the discrete subtype definition in an iteration scheme.
function Process_Subtype
(S : Node_Id;
-- Process the discriminants contained in an N_Full_Type_Declaration or
-- N_Incomplete_Type_Decl node N. If the declaration is a completion,
-- Prev is entity on the partial view, on which references are posted.
+ -- However, note that Process_Discriminants is called for a completion only
+ -- if partial view had no discriminants (else we just check conformance
+ -- between the two views and do not call Process_Discriminants again for
+ -- the completion).
function Replace_Anonymous_Access_To_Protected_Subprogram
(N : Node_Id) return Entity_Id;
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