-- --
-- S p e c --
-- --
--- $Revision: 1.22 $ --
--- --
--- Copyright (C) 1992,1993,1994,1995,1996 Free Software Foundation, Inc. --
+-- Copyright (C) 1992-2005, 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- --
-- 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, 59 Temple Place - Suite 330, Boston, --
--- MA 02111-1307, USA. --
+-- to the Free Software Foundation, 51 Franklin Street, Fifth Floor, --
+-- Boston, MA 02110-1301, USA. --
-- --
-- GNAT was originally developed by the GNAT team at New York University. --
--- It is now maintained by Ada Core Technologies Inc (http://www.gnat.com). --
+-- Extensive contributions were provided by Ada Core Technologies Inc. --
-- --
------------------------------------------------------------------------------
-- or not to copy a referenced Itype. If the associated node is part of
-- the tree to be copied by New_Copy_Tree, then (since the idea of the
-- call to New_Copy_Tree is to create a complete duplicate of a tree,
- -- as though it had appeared separately int he source), the Itype in
+ -- as though it had appeared separately in the source), the Itype in
-- question is duplicated as part of the New_Copy_Tree processing.
-----------------
Related_Id : Entity_Id := Empty;
Suffix : Character := ' ';
Suffix_Index : Nat := 0;
- Scope_Id : Entity_Id := Current_Scope)
- return Entity_Id;
+ Scope_Id : Entity_Id := Current_Scope) return Entity_Id;
-- Used to create a new Itype.
--
-- Related_Nod is the node for which this Itype was created. It is
-- The Scope_Id parameter specifies the scope of the created type, and
-- is normally the Current_Scope as shown, but can be set otherwise.
+ ---------------------------------
+ -- Create_Null_Excluding_Itype --
+ ---------------------------------
+
+ function Create_Null_Excluding_Itype
+ (T : Entity_Id;
+ Related_Nod : Node_Id;
+ Scope_Id : Entity_Id := Current_Scope) return Entity_Id;
+ -- Ada 2005 (AI-231): T is an access type and this subprogram creates and
+ -- returns an internal access-subtype declaration of T that has the null
+ -- exclusion attribute set to True.
+ --
+ -- Usage of null-excluding itypes
+ -- ------------------------------
+ --
+ -- type T1 is access ...
+ -- type T2 is not null T1;
+ --
+ -- type Rec is record
+ -- Comp : not null T1;
+ -- end record;
+ --
+ -- type Arr is array (...) of not null T1;
+ --
+ -- Instead of associating the not-null attribute with the defining ids of
+ -- these declarations, we generate an internal subtype declaration of T1
+ -- that has the null exclusion attribute set to true.
+
end Itypes;
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