1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
|
------------------------------------------------------------------------------
-- --
-- GNAT COMPILER COMPONENTS --
-- --
-- S C A N S --
-- --
-- B o d y --
-- --
-- Copyright (C) 1992-2024, 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. --
-- --
------------------------------------------------------------------------------
with Snames; use Snames;
package body Scans is
-----------------------------
-- Initialize_Ada_Keywords --
-----------------------------
procedure Initialize_Ada_Keywords is
procedure Set_Reserved (N : Name_Id; T : Token_Type);
pragma Inline (Set_Reserved);
-- Set given name as a reserved word (T is the corresponding token)
------------------
-- Set_Reserved --
------------------
procedure Set_Reserved (N : Name_Id; T : Token_Type) is
begin
-- Set up Token_Type values in Names table entries for reserved
-- words. We use the Pos value of the Token_Type value. Note that
-- Is_Keyword_Name relies on the fact that Token_Type'Val (0) is not
-- a reserved word.
Set_Name_Table_Byte (N, Token_Type'Pos (T));
end Set_Reserved;
-- Start of processing for Initialize_Ada_Keywords
begin
-- Establish reserved words
Set_Reserved (Name_Abort, Tok_Abort);
Set_Reserved (Name_Abs, Tok_Abs);
Set_Reserved (Name_Abstract, Tok_Abstract);
Set_Reserved (Name_Accept, Tok_Accept);
Set_Reserved (Name_Access, Tok_Access);
Set_Reserved (Name_And, Tok_And);
Set_Reserved (Name_Aliased, Tok_Aliased);
Set_Reserved (Name_All, Tok_All);
Set_Reserved (Name_Array, Tok_Array);
Set_Reserved (Name_At, Tok_At);
Set_Reserved (Name_Begin, Tok_Begin);
Set_Reserved (Name_Body, Tok_Body);
Set_Reserved (Name_Case, Tok_Case);
Set_Reserved (Name_Constant, Tok_Constant);
Set_Reserved (Name_Declare, Tok_Declare);
Set_Reserved (Name_Delay, Tok_Delay);
Set_Reserved (Name_Delta, Tok_Delta);
Set_Reserved (Name_Digits, Tok_Digits);
Set_Reserved (Name_Do, Tok_Do);
Set_Reserved (Name_Else, Tok_Else);
Set_Reserved (Name_Elsif, Tok_Elsif);
Set_Reserved (Name_End, Tok_End);
Set_Reserved (Name_Entry, Tok_Entry);
Set_Reserved (Name_Exception, Tok_Exception);
Set_Reserved (Name_Exit, Tok_Exit);
Set_Reserved (Name_For, Tok_For);
Set_Reserved (Name_Function, Tok_Function);
Set_Reserved (Name_Generic, Tok_Generic);
Set_Reserved (Name_Goto, Tok_Goto);
Set_Reserved (Name_If, Tok_If);
Set_Reserved (Name_In, Tok_In);
Set_Reserved (Name_Is, Tok_Is);
Set_Reserved (Name_Limited, Tok_Limited);
Set_Reserved (Name_Loop, Tok_Loop);
Set_Reserved (Name_Mod, Tok_Mod);
Set_Reserved (Name_New, Tok_New);
Set_Reserved (Name_Not, Tok_Not);
Set_Reserved (Name_Null, Tok_Null);
Set_Reserved (Name_Of, Tok_Of);
Set_Reserved (Name_Or, Tok_Or);
Set_Reserved (Name_Others, Tok_Others);
Set_Reserved (Name_Out, Tok_Out);
Set_Reserved (Name_Package, Tok_Package);
Set_Reserved (Name_Pragma, Tok_Pragma);
Set_Reserved (Name_Private, Tok_Private);
Set_Reserved (Name_Procedure, Tok_Procedure);
Set_Reserved (Name_Protected, Tok_Protected);
Set_Reserved (Name_Raise, Tok_Raise);
Set_Reserved (Name_Range, Tok_Range);
Set_Reserved (Name_Record, Tok_Record);
Set_Reserved (Name_Rem, Tok_Rem);
Set_Reserved (Name_Renames, Tok_Renames);
Set_Reserved (Name_Requeue, Tok_Requeue);
Set_Reserved (Name_Return, Tok_Return);
Set_Reserved (Name_Reverse, Tok_Reverse);
Set_Reserved (Name_Select, Tok_Select);
Set_Reserved (Name_Separate, Tok_Separate);
Set_Reserved (Name_Subtype, Tok_Subtype);
Set_Reserved (Name_Tagged, Tok_Tagged);
Set_Reserved (Name_Task, Tok_Task);
Set_Reserved (Name_Terminate, Tok_Terminate);
Set_Reserved (Name_Then, Tok_Then);
Set_Reserved (Name_Type, Tok_Type);
Set_Reserved (Name_Until, Tok_Until);
Set_Reserved (Name_Use, Tok_Use);
Set_Reserved (Name_When, Tok_When);
Set_Reserved (Name_While, Tok_While);
Set_Reserved (Name_With, Tok_With);
Set_Reserved (Name_Xor, Tok_Xor);
-- Ada 2005 reserved words
Set_Reserved (Name_Interface, Tok_Interface);
Set_Reserved (Name_Overriding, Tok_Overriding);
Set_Reserved (Name_Synchronized, Tok_Synchronized);
-- Ada 2012 reserved words
Set_Reserved (Name_Some, Tok_Some);
end Initialize_Ada_Keywords;
------------------
-- Keyword_Name --
------------------
function Keyword_Name (Token : Token_Type) return Name_Id is
Tok : String := Token'Img;
pragma Assert (Tok (1 .. 4) = "TOK_");
Name : String renames Tok (5 .. Tok'Last);
begin
-- Convert to lower case. We don't want to add a dependence on a
-- general-purpose To_Lower routine, so we convert "by hand" here.
-- All keywords use 7-bit ASCII letters only, so this works.
for J in Name'Range loop
pragma Assert (Name (J) in 'A' .. 'Z');
Name (J) :=
Character'Val (Character'Pos (Name (J)) +
(Character'Pos ('a') - Character'Pos ('A')));
end loop;
return Name_Find (Name);
end Keyword_Name;
------------------------
-- Restore_Scan_State --
------------------------
procedure Restore_Scan_State (Saved_State : Saved_Scan_State) is
begin
Scan_Ptr := Saved_State.Save_Scan_Ptr;
Token := Saved_State.Save_Token;
Token_Ptr := Saved_State.Save_Token_Ptr;
Current_Line_Start := Saved_State.Save_Current_Line_Start;
Start_Column := Saved_State.Save_Start_Column;
Checksum := Saved_State.Save_Checksum;
First_Non_Blank_Location := Saved_State.Save_First_Non_Blank_Location;
Token_Node := Saved_State.Save_Token_Node;
Token_Name := Saved_State.Save_Token_Name;
Prev_Token := Saved_State.Save_Prev_Token;
Prev_Token_Ptr := Saved_State.Save_Prev_Token_Ptr;
end Restore_Scan_State;
---------------------
-- Save_Scan_State --
---------------------
procedure Save_Scan_State (Saved_State : out Saved_Scan_State) is
begin
Saved_State.Save_Scan_Ptr := Scan_Ptr;
Saved_State.Save_Token := Token;
Saved_State.Save_Token_Ptr := Token_Ptr;
Saved_State.Save_Current_Line_Start := Current_Line_Start;
Saved_State.Save_Start_Column := Start_Column;
Saved_State.Save_Checksum := Checksum;
Saved_State.Save_First_Non_Blank_Location := First_Non_Blank_Location;
Saved_State.Save_Token_Node := Token_Node;
Saved_State.Save_Token_Name := Token_Name;
Saved_State.Save_Prev_Token := Prev_Token;
Saved_State.Save_Prev_Token_Ptr := Prev_Token_Ptr;
end Save_Scan_State;
end Scans;
|
