1 ------------------------------------------------------------------------------
3 -- GNAT COMPILER COMPONENTS --
9 -- Copyright (C) 1992-2012, Free Software Foundation, Inc. --
11 -- GNAT is free software; you can redistribute it and/or modify it under --
12 -- terms of the GNU General Public License as published by the Free Soft- --
13 -- ware Foundation; either version 3, or (at your option) any later ver- --
14 -- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
15 -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
16 -- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License --
17 -- for more details. You should have received a copy of the GNU General --
18 -- Public License distributed with GNAT; see file COPYING3. If not, go to --
19 -- http://www.gnu.org/licenses for a complete copy of the license. --
21 -- GNAT was originally developed by the GNAT team at New York University. --
22 -- Extensive contributions were provided by Ada Core Technologies Inc. --
24 ------------------------------------------------------------------------------
26 -- This child package of Sinfo contains some routines that permit in place
27 -- alteration of existing tree nodes by changing the value in the Nkind
28 -- field. Since Nkind functions logically in a manner similar to a variant
29 -- record discriminant part, such alterations cannot be permitted in a
30 -- general manner, but in some specific cases, the fields of related nodes
31 -- have been deliberately layed out in a manner that permits such alteration.
33 with Atree; use Atree;
34 with Snames; use Snames;
36 package body Sinfo.CN is
38 use Atree.Unchecked_Access;
39 -- This package is one of the few packages which is allowed to make direct
40 -- references to tree nodes (since it is in the business of providing a
41 -- higher level of tree access which other clients are expected to use and
42 -- which implements checks).
44 ------------------------------------------------------------
45 -- Change_Character_Literal_To_Defining_Character_Literal --
46 ------------------------------------------------------------
48 procedure Change_Character_Literal_To_Defining_Character_Literal
52 Set_Nkind (N, N_Defining_Character_Literal);
54 end Change_Character_Literal_To_Defining_Character_Literal;
56 ------------------------------------
57 -- Change_Conversion_To_Unchecked --
58 ------------------------------------
60 procedure Change_Conversion_To_Unchecked (N : Node_Id) is
62 Set_Do_Overflow_Check (N, False);
63 Set_Do_Tag_Check (N, False);
64 Set_Do_Length_Check (N, False);
65 Set_Nkind (N, N_Unchecked_Type_Conversion);
66 end Change_Conversion_To_Unchecked;
68 ----------------------------------------------
69 -- Change_Identifier_To_Defining_Identifier --
70 ----------------------------------------------
72 procedure Change_Identifier_To_Defining_Identifier (N : in out Node_Id) is
74 Set_Nkind (N, N_Defining_Identifier);
76 end Change_Identifier_To_Defining_Identifier;
78 ---------------------------------------------
79 -- Change_Name_To_Procedure_Call_Statement --
80 ---------------------------------------------
82 procedure Change_Name_To_Procedure_Call_Statement (N : Node_Id) is
84 -- Case of Indexed component, which is a procedure call with arguments
86 if Nkind (N) = N_Indexed_Component then
88 Prefix_Node : constant Node_Id := Prefix (N);
89 Exprs_Node : constant List_Id := Expressions (N);
92 Change_Node (N, N_Procedure_Call_Statement);
93 Set_Name (N, Prefix_Node);
94 Set_Parameter_Associations (N, Exprs_Node);
97 -- Case of function call node, which is a really a procedure call
99 elsif Nkind (N) = N_Function_Call then
101 Fname_Node : constant Node_Id := Name (N);
102 Params_List : constant List_Id := Parameter_Associations (N);
105 Change_Node (N, N_Procedure_Call_Statement);
106 Set_Name (N, Fname_Node);
107 Set_Parameter_Associations (N, Params_List);
110 -- Case of call to attribute that denotes a procedure. Here we just
111 -- leave the attribute reference unchanged.
113 elsif Nkind (N) = N_Attribute_Reference
114 and then Is_Procedure_Attribute_Name (Attribute_Name (N))
118 -- All other cases of names are parameterless procedure calls
122 Name_Node : constant Node_Id := Relocate_Node (N);
124 Change_Node (N, N_Procedure_Call_Statement);
125 Set_Name (N, Name_Node);
128 end Change_Name_To_Procedure_Call_Statement;
130 --------------------------------------------------------
131 -- Change_Operator_Symbol_To_Defining_Operator_Symbol --
132 --------------------------------------------------------
134 procedure Change_Operator_Symbol_To_Defining_Operator_Symbol
138 Set_Nkind (N, N_Defining_Operator_Symbol);
139 Set_Node2 (N, Empty); -- Clear unused Str2 field
140 N := Extend_Node (N);
141 end Change_Operator_Symbol_To_Defining_Operator_Symbol;
143 ----------------------------------------------
144 -- Change_Operator_Symbol_To_String_Literal --
145 ----------------------------------------------
147 procedure Change_Operator_Symbol_To_String_Literal (N : Node_Id) is
149 Set_Nkind (N, N_String_Literal);
150 Set_Node1 (N, Empty); -- clear Name1 field
151 end Change_Operator_Symbol_To_String_Literal;
153 ------------------------------------------------
154 -- Change_Selected_Component_To_Expanded_Name --
155 ------------------------------------------------
157 procedure Change_Selected_Component_To_Expanded_Name (N : Node_Id) is
159 Set_Nkind (N, N_Expanded_Name);
160 Set_Chars (N, Chars (Selector_Name (N)));
161 end Change_Selected_Component_To_Expanded_Name;