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------------------------------------------------------------------------------
-- --
-- GNAT COMPILER COMPONENTS --
-- --
-- S I N F O . C N --
-- --
-- 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 child package of Sinfo contains some routines that permit in place
-- alteration of existing tree nodes by changing the value in the Nkind
-- field. Since Nkind functions logically in a manner similar to a variant
-- record discriminant part, such alterations cannot be permitted in a
-- general manner, but in some specific cases, the fields of related nodes
-- have been deliberately layed out in a manner that permits such alteration.
with Atree; use Atree;
package body Sinfo.CN is
use Atree.Unchecked_Access;
-- This package is one of the few packages which is allowed to make direct
-- references to tree nodes (since it is in the business of providing a
-- higher level of tree access which other clients are expected to use and
-- which implements checks).
------------------------------------------------------------
-- Change_Character_Literal_To_Defining_Character_Literal --
------------------------------------------------------------
procedure Change_Character_Literal_To_Defining_Character_Literal
(N : in out Node_Id)
is
begin
Set_Nkind (N, N_Defining_Character_Literal);
N := Extend_Node (N);
end Change_Character_Literal_To_Defining_Character_Literal;
------------------------------------
-- Change_Conversion_To_Unchecked --
------------------------------------
procedure Change_Conversion_To_Unchecked (N : Node_Id) is
begin
Set_Do_Overflow_Check (N, False);
Set_Do_Tag_Check (N, False);
Set_Do_Length_Check (N, False);
Set_Nkind (N, N_Unchecked_Type_Conversion);
end Change_Conversion_To_Unchecked;
----------------------------------------------
-- Change_Identifier_To_Defining_Identifier --
----------------------------------------------
procedure Change_Identifier_To_Defining_Identifier (N : in out Node_Id) is
begin
Set_Nkind (N, N_Defining_Identifier);
N := Extend_Node (N);
end Change_Identifier_To_Defining_Identifier;
--------------------------------------------------------
-- Change_Operator_Symbol_To_Defining_Operator_Symbol --
--------------------------------------------------------
procedure Change_Operator_Symbol_To_Defining_Operator_Symbol
(N : in out Node_Id)
is
begin
Set_Nkind (N, N_Defining_Operator_Symbol);
Set_Node2 (N, Empty); -- Clear unused Str2 field
N := Extend_Node (N);
end Change_Operator_Symbol_To_Defining_Operator_Symbol;
----------------------------------------------
-- Change_Operator_Symbol_To_String_Literal --
----------------------------------------------
procedure Change_Operator_Symbol_To_String_Literal (N : Node_Id) is
begin
Set_Nkind (N, N_String_Literal);
Set_Node1 (N, Empty); -- clear Name1 field
end Change_Operator_Symbol_To_String_Literal;
------------------------------------------------
-- Change_Selected_Component_To_Expanded_Name --
------------------------------------------------
procedure Change_Selected_Component_To_Expanded_Name (N : Node_Id) is
begin
Set_Nkind (N, N_Expanded_Name);
Set_Chars (N, Chars (Selector_Name (N)));
end Change_Selected_Component_To_Expanded_Name;
end Sinfo.CN;
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