-- --
-- S p e c --
-- --
--- Copyright (C) 1992-2005 Free Software Foundation, Inc. --
+-- Copyright (C) 1992-2007, 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 2, or (at your option) any later ver- --
+-- 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 COPYING. If not, write --
--- to the Free Software Foundation, 51 Franklin Street, Fifth Floor, --
--- Boston, MA 02110-1301, USA. --
+-- 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. --
with Types; use Types;
package Sem_Ch3 is
- procedure Analyze_Component_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_Object_Declaration (N : Node_Id);
- procedure Analyze_Others_Choice (N : Node_Id);
- procedure Analyze_Private_Extension_Declaration (N : Node_Id);
- procedure Analyze_Subtype_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_Component_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_Object_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
+ (N : Node_Id;
+ Skip : Boolean := False);
+ -- Called to analyze a subtype declaration. The parameter Skip is used for
+ -- Ada 2005 (AI-412). We set to True in order to avoid reentering the
+ -- defining identifier of N when analyzing a rewritten incomplete subtype
+ -- declaration.
function Access_Definition
(Related_Nod : Node_Id;
N : Node_Id) return Entity_Id;
-- An access definition defines a general access type for a formal
- -- parameter. The procedure is called when processing formals, when
+ -- parameter. The procedure is called when processing formals, when
-- the current scope is the subprogram. The Implicit type is attached
-- to the Related_Nod put into the enclosing scope, so that the only
-- entities defined in the spec are the formals themselves.
-- Called to analyze a list of declarations (in what context ???). Also
-- performs necessary freezing actions (more description needed ???)
+ procedure Analyze_Interface_Declaration (T : Entity_Id; Def : Node_Id);
+ -- Analyze an interface declaration or a formal interface declaration
+
procedure Analyze_Per_Use_Expression (N : Node_Id; T : Entity_Id);
-- Default and per object expressions do not freeze their components,
-- and must be analyzed and resolved accordingly. The analysis is
procedure Derive_Subprograms
(Parent_Type : Entity_Id;
Derived_Type : Entity_Id;
- Generic_Actual : Entity_Id := Empty;
- No_Predefined_Prims : Boolean := False;
- Predefined_Prims_Only : Boolean := False);
+ Generic_Actual : Entity_Id := Empty);
-- To complete type derivation, collect/retrieve the primitive operations
-- of the parent type, and replace the subsidiary subtypes with the derived
-- type, to build the specs of the inherited ops. For generic actuals, the
-- the derived subprograms are aliased to those of the actual, not those of
-- the ancestor. The last two params are used in case of derivation from
-- abstract interface types: No_Predefined_Prims is used to avoid the
- -- derivation of predefined primitives from the interface, and Predefined
- -- Prims_Only is used to complete the derivation predefined primitives
- -- in case of private tagged types implementing interfaces.
+ -- derivation of predefined primitives from an abstract interface.
--
-- 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;
+ Dest : Elist_Id) return Entity_Id;
+ -- Ada 2005: Determine whether the interfaces in list Src are all present
+ -- in the list Dest. Return the first differing interface, or Empty
+ -- otherwise.
+
function Find_Type_Of_Subtype_Indic (S : Node_Id) return Entity_Id;
-- Given a subtype indication S (which is really an N_Subtype_Indication
-- node or a plain N_Identifier), find the type of the subtype mark.
-- Given a discriminant somewhere in the Typ_For_Constraint tree
-- and a Constraint, return the value of that discriminant.
+ function Is_Null_Extension (T : Entity_Id) return Boolean;
+ -- Returns True if the tagged type T has an N_Full_Type_Declaration that
+ -- is a null extension, meaning that it has an extension part without any
+ -- components and does not have a known discriminant part.
+
function Is_Visible_Component (C : Entity_Id) return Boolean;
-- Determines if a record component C is visible in the present context.
-- Note that even though component C could appear in the entity chain
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. 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 type as well.
+ -- 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 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;
+ -- Always False in Ada 95 mode. Equivalent to OK_For_Limited_Init_In_05 in
+ -- Ada 2005 mode.
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
-- 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.
+ -- checking statements generated by the Checks package. R_Check_Off is set
+ -- to True when the call to Range_Check is to be skipped.
function Process_Subtype
(S : Node_Id;
-- Prev is entity on the partial view, on which references are posted.
function Replace_Anonymous_Access_To_Protected_Subprogram
- (N : Node_Id;
- Prev_E : Entity_Id) return Entity_Id;
+ (N : Node_Id) return Entity_Id;
-- Ada 2005 (AI-254): Create and decorate an internal full type declaration
- -- in the enclosing scope corresponding to an anonymous access to protected
- -- subprogram. In addition, replace the anonymous access by an occurrence
- -- of this internal type. Prev_Etype is used to link the new internal
- -- entity with the anonymous entity. Return the entity of this type
- -- declaration.
+ -- for an anonymous access to protected subprogram. For a record component
+ -- declaration, the type is created in the enclosing scope, for an array
+ -- type declaration or an object declaration it is simply placed ahead of
+ -- this declaration.
procedure Set_Completion_Referenced (E : Entity_Id);
-- If E is the completion of a private or incomplete type declaration,
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