| ------------------------------------------------------------------------------ |
| -- -- |
| -- 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; |
