164 lines
6.7 KiB
Ada
164 lines
6.7 KiB
Ada
------------------------------------------------------------------------------
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-- --
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-- GNAT COMPILER COMPONENTS --
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-- --
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-- S I N F O . C N --
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-- --
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-- B o d y --
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-- --
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-- Copyright (C) 1992-2012, Free Software Foundation, Inc. --
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-- --
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-- GNAT is free software; you can redistribute it and/or modify it under --
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-- terms of the GNU General Public License as published by the Free Soft- --
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-- ware Foundation; either version 3, or (at your option) any later ver- --
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-- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
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-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
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-- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License --
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-- for more details. You should have received a copy of the GNU General --
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-- Public License distributed with GNAT; see file COPYING3. If not, go to --
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-- http://www.gnu.org/licenses for a complete copy of the license. --
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-- --
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-- GNAT was originally developed by the GNAT team at New York University. --
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-- Extensive contributions were provided by Ada Core Technologies Inc. --
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-- --
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------------------------------------------------------------------------------
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-- This child package of Sinfo contains some routines that permit in place
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-- alteration of existing tree nodes by changing the value in the Nkind
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-- field. Since Nkind functions logically in a manner similar to a variant
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-- record discriminant part, such alterations cannot be permitted in a
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-- general manner, but in some specific cases, the fields of related nodes
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-- have been deliberately layed out in a manner that permits such alteration.
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with Atree; use Atree;
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with Snames; use Snames;
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package body Sinfo.CN is
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use Atree.Unchecked_Access;
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-- This package is one of the few packages which is allowed to make direct
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-- references to tree nodes (since it is in the business of providing a
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-- higher level of tree access which other clients are expected to use and
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-- which implements checks).
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------------------------------------------------------------
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-- Change_Character_Literal_To_Defining_Character_Literal --
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------------------------------------------------------------
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procedure Change_Character_Literal_To_Defining_Character_Literal
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(N : in out Node_Id)
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is
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begin
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Set_Nkind (N, N_Defining_Character_Literal);
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N := Extend_Node (N);
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end Change_Character_Literal_To_Defining_Character_Literal;
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------------------------------------
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-- Change_Conversion_To_Unchecked --
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------------------------------------
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procedure Change_Conversion_To_Unchecked (N : Node_Id) is
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begin
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Set_Do_Overflow_Check (N, False);
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Set_Do_Tag_Check (N, False);
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Set_Do_Length_Check (N, False);
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Set_Nkind (N, N_Unchecked_Type_Conversion);
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end Change_Conversion_To_Unchecked;
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----------------------------------------------
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-- Change_Identifier_To_Defining_Identifier --
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----------------------------------------------
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procedure Change_Identifier_To_Defining_Identifier (N : in out Node_Id) is
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begin
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Set_Nkind (N, N_Defining_Identifier);
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N := Extend_Node (N);
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end Change_Identifier_To_Defining_Identifier;
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---------------------------------------------
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-- Change_Name_To_Procedure_Call_Statement --
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---------------------------------------------
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procedure Change_Name_To_Procedure_Call_Statement (N : Node_Id) is
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begin
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-- Case of Indexed component, which is a procedure call with arguments
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if Nkind (N) = N_Indexed_Component then
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declare
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Prefix_Node : constant Node_Id := Prefix (N);
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Exprs_Node : constant List_Id := Expressions (N);
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begin
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Change_Node (N, N_Procedure_Call_Statement);
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Set_Name (N, Prefix_Node);
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Set_Parameter_Associations (N, Exprs_Node);
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end;
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-- Case of function call node, which is a really a procedure call
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elsif Nkind (N) = N_Function_Call then
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declare
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Fname_Node : constant Node_Id := Name (N);
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Params_List : constant List_Id := Parameter_Associations (N);
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begin
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Change_Node (N, N_Procedure_Call_Statement);
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Set_Name (N, Fname_Node);
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Set_Parameter_Associations (N, Params_List);
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end;
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-- Case of call to attribute that denotes a procedure. Here we just
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-- leave the attribute reference unchanged.
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elsif Nkind (N) = N_Attribute_Reference
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and then Is_Procedure_Attribute_Name (Attribute_Name (N))
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then
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null;
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-- All other cases of names are parameterless procedure calls
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else
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declare
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Name_Node : constant Node_Id := Relocate_Node (N);
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begin
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Change_Node (N, N_Procedure_Call_Statement);
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Set_Name (N, Name_Node);
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end;
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end if;
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end Change_Name_To_Procedure_Call_Statement;
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--------------------------------------------------------
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-- Change_Operator_Symbol_To_Defining_Operator_Symbol --
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--------------------------------------------------------
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procedure Change_Operator_Symbol_To_Defining_Operator_Symbol
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(N : in out Node_Id)
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is
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begin
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Set_Nkind (N, N_Defining_Operator_Symbol);
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Set_Node2 (N, Empty); -- Clear unused Str2 field
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N := Extend_Node (N);
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end Change_Operator_Symbol_To_Defining_Operator_Symbol;
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----------------------------------------------
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-- Change_Operator_Symbol_To_String_Literal --
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----------------------------------------------
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procedure Change_Operator_Symbol_To_String_Literal (N : Node_Id) is
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begin
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Set_Nkind (N, N_String_Literal);
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Set_Node1 (N, Empty); -- clear Name1 field
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end Change_Operator_Symbol_To_String_Literal;
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------------------------------------------------
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-- Change_Selected_Component_To_Expanded_Name --
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------------------------------------------------
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procedure Change_Selected_Component_To_Expanded_Name (N : Node_Id) is
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begin
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Set_Nkind (N, N_Expanded_Name);
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Set_Chars (N, Chars (Selector_Name (N)));
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end Change_Selected_Component_To_Expanded_Name;
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end Sinfo.CN;
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