------------------------------------------------------------------------------ -- -- -- 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;