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------------------------------------------------------------------------------
-- --
-- GNAT COMPILER COMPONENTS --
-- --
-- S I N F O . C N --
-- --
-- B o d y --
-- --
-- Copyright (C) 1992-2021, 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;
with Snames; use Snames;
with Sinfo.Nodes; use Sinfo.Nodes;
with Sinfo.Utils; use Sinfo.Utils;
package body Sinfo.CN is
procedure Assert_Expression_Fields_Zero (N : Node_Id);
-- Asserts that all fields documented in Sinfo as "plus fields for
-- expression" have their initial zero value. Note that N_Operator_Symbol
-- is not documented as having "plus fields for expression", but it is in
-- N_Subexpr, so it does.
-- ????This is redundant with Check_Vanishing_Fields in Atree.
-----------------------------------
-- Assert_Expression_Fields_Zero --
-----------------------------------
procedure Assert_Expression_Fields_Zero (N : Node_Id) is
begin
pragma Assert (Paren_Count (N) = 0);
pragma Assert (No (Etype (N)));
pragma Assert (not Is_Overloaded (N));
pragma Assert (not Is_Static_Expression (N));
pragma Assert (not Raises_Constraint_Error (N));
pragma Assert (not Must_Not_Freeze (N));
pragma Assert (not Do_Range_Check (N));
pragma Assert (not Has_Dynamic_Length_Check (N));
pragma Assert (not Assignment_OK (N));
pragma Assert (not Is_Controlling_Actual (N));
end Assert_Expression_Fields_Zero;
------------------------------------------------------------
-- Change_Character_Literal_To_Defining_Character_Literal --
------------------------------------------------------------
procedure Change_Character_Literal_To_Defining_Character_Literal
(N : Node_Id)
is
begin
Reinit_Field_To_Zero (N, Char_Literal_Value);
-- ????pragma Assert (No (Node2 (N))); -- Char_Literal_Value is Uint2 out of r
pragma Assert (No (Entity (N)));
pragma Assert (No (Associated_Node (N)));
pragma Assert (not Has_Private_View (N));
Assert_Expression_Fields_Zero (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);
Mutate_Nkind (N, N_Unchecked_Type_Conversion);
end Change_Conversion_To_Unchecked;
----------------------------------------------
-- Change_Identifier_To_Defining_Identifier --
----------------------------------------------
procedure Change_Identifier_To_Defining_Identifier (N : Node_Id) is
begin
pragma Assert (No (Entity (N)));
pragma Assert (No (Associated_Node (N)));
pragma Assert (No (Original_Discriminant (N)));
pragma Assert (not Is_Elaboration_Checks_OK_Node (N));
pragma Assert (not Is_SPARK_Mode_On_Node (N));
pragma Assert (not Is_Elaboration_Warnings_OK_Node (N));
pragma Assert (not Has_Private_View (N));
pragma Assert (not Redundant_Use (N));
pragma Assert (not Atomic_Sync_Required (N));
Assert_Expression_Fields_Zero (N);
Extend_Node (N);
end Change_Identifier_To_Defining_Identifier;
---------------------------------------------
-- Change_Name_To_Procedure_Call_Statement --
---------------------------------------------
procedure Change_Name_To_Procedure_Call_Statement (N : Node_Id) is
begin
-- Case of Indexed component, which is a procedure call with arguments
if Nkind (N) = N_Indexed_Component then
declare
Prefix_Node : constant Node_Id := Prefix (N);
Exprs_Node : constant List_Id := Expressions (N);
begin
Change_Node (N, N_Procedure_Call_Statement);
Set_Name (N, Prefix_Node);
Set_Parameter_Associations (N, Exprs_Node);
end;
-- Case of function call node, which is a really a procedure call
elsif Nkind (N) = N_Function_Call then
declare
Fname_Node : constant Node_Id := Name (N);
Params_List : constant List_Id := Parameter_Associations (N);
begin
Change_Node (N, N_Procedure_Call_Statement);
Set_Name (N, Fname_Node);
Set_Parameter_Associations (N, Params_List);
end;
-- Case of call to attribute that denotes a procedure. Here we just
-- leave the attribute reference unchanged.
elsif Nkind (N) = N_Attribute_Reference
and then Is_Procedure_Attribute_Name (Attribute_Name (N))
then
null;
-- All other cases of names are parameterless procedure calls
else
declare
Name_Node : constant Node_Id := Relocate_Node (N);
begin
Change_Node (N, N_Procedure_Call_Statement);
Set_Name (N, Name_Node);
end;
end if;
end Change_Name_To_Procedure_Call_Statement;
--------------------------------------------------------
-- Change_Operator_Symbol_To_Defining_Operator_Symbol --
--------------------------------------------------------
procedure Change_Operator_Symbol_To_Defining_Operator_Symbol
(N : Node_Id)
is
begin
Reinit_Field_To_Zero (N, Strval);
-- ????pragma Assert (No (Node3 (N))); -- Strval is Str3, 0 is out of range
pragma Assert (No (Entity (N)));
pragma Assert (No (Associated_Node (N)));
pragma Assert (No (Etype (N)));
pragma Assert (not Has_Private_View (N));
Assert_Expression_Fields_Zero (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
Reinit_Field_To_Zero (N, Chars);
Set_Entity (N, Empty);
-- ????pragma Assert (No (Node1 (N))); -- Chars is Name1 out of range
pragma Assert (No (Entity (N)));
pragma Assert (No (Associated_Node (N)));
pragma Assert (No (Etype (N)));
pragma Assert (not Has_Private_View (N));
Mutate_Nkind (N, N_String_Literal);
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
Mutate_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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