This file is indexed.

/usr/share/ada/adainclude/opentoken/opentoken-token-enumerated.adb is in libopentoken3-dev 4.0b-4.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

  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
-------------------------------------------------------------------------------
--
-- Copyright (C) 2009 Stephe Leake
-- Copyright (C) 1999 Ted Dennison
--
-- This file is part of the OpenToken package.
--
-- The OpenToken package is free software; you can redistribute it and/or
-- modify it under the terms of the  GNU General Public License as published
-- by the Free Software Foundation; either version 3, or (at your option)
-- any later version. The OpenToken package is distributed in the hope that
-- it will be useful, but WITHOUT 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 the OpenToken
-- package;  see file GPL.txt.  If not, write to  the Free Software Foundation,
-- 59 Temple Place - Suite 330,  Boston, MA 02111-1307, USA.
--
--  As a special exception, if other files instantiate generics from
--  this unit, or you link this unit with other files to produce an
--  executable, this unit does not by itself cause the resulting
--  executable to be covered by the GNU General Public License. This
--  exception does not however invalidate any other reasons why the
--  executable file might be covered by the GNU Public License.
--
-------------------------------------------------------------------------------

with Ada.Tags;
with Ada.Text_IO;
package body OpenToken.Token.Enumerated is

   function Get
     (ID    : in Token_ID := Token_ID'First;
      Name  : in String   := "";
      Build : in Action   := null)
     return Instance'Class
   is begin
      if Name = "" then
         return Instance'Class (Instance'(Name => null, ID => ID, Build => Build));
      else
         return Instance'Class (Instance'(Name => new String'(Name), ID => ID, Build => Build));
      end if;
   end Get;

   procedure Set_Build (Token : in out Instance'Class; Build : in Action)
   is begin
      Token.Build := Build;
   end Set_Build;

   function ID (Token : in Instance'Class) return Token_ID is
   begin
      return Token.ID;
   end ID;

   procedure Set_ID
     (Token : in out Instance'Class;
      ID    : in     Token_ID)
   is begin
      Token.ID := ID;
   end Set_ID;

   overriding procedure Parse
     (Match    : access Instance;
      Analyzer : in out Source_Class;
      Actively : in     Boolean      := True)
   is
      use type Ada.Tags.Tag;
      Next_Token : constant OpenToken.Token.Class := Get (Analyzer);
   begin
      if Trace_Parse then
         Trace_Indent := Trace_Indent + 1;
         if Actively then
            Trace_Put ("parsing");
         else
            Trace_Put ("trying");
         end if;
         Ada.Text_IO.Put_Line (" enumerated " & Name_Dispatch (Match));
      end if;

      if Instance (Next_Token).ID = Match.ID then
         --  Next_Token was passed to a dispatching Create by
         --  Find_Next; copy the results of that.
         --
         --  Previous versions of OpenToken called Create again here,
         --  with an argument of Lexeme (Analyzer), which is wrong
         --  when Next_Token was read from the lookahead queue, since
         --  the Lexeme reads from the input buffer, which is not
         --  preserved in the lookahead queue. We added Copy to handle
         --  that; lexeme is preserved in the copy of the token in the
         --  lookahead queue.
         --
         --  Note that we can't just use ':='; that doesn't dispatch,
         --  so it only copies the ID, which is pointless.
         --
         --  This change (not calling Create here) will cause user
         --  applications to silently fail (silently meaning the
         --  compiler won't catch it; user unit tests should catch the
         --  problem). We can't make Copy abstract, because
         --  Enumerated.Instance can't be abstract.

         if Actively then
            if Next_Token'Tag = Class (Match.all)'Tag then
               Copy (To => Class (Match.all), From => Next_Token);
               if Match.Build /= null then
                  Match.Build (Match.all);
               end if;
            else
               --  It is the parser programmer's job to ensure these types match.
               raise Programmer_Error with
                 "Expected a token of type " & Ada.Tags.Expanded_Name (Class (Match.all)'Tag) &
                 "'Class but found a " & Ada.Tags.Expanded_Name (Next_Token'Tag);
            end if;
         end if;
      else
         if Actively then
            raise Parse_Error with "Expected " & Name_Dispatch (Match) & " but found " & Name_Dispatch (Next_Token);
         else
            --  The spec says "raise Parse_Error with no message". If
            --  we leave out 'with ""' here, GNAT attaches a message
            --  giving the line number. That's useful in general, but
            --  fails our unit test. And it would be painful (and
            --  non-portable) to maintain a unit test that checked for
            --  the GNAT string, since it has line numbers in it. So
            --  we override it in this case.
            --
            --  The point of "raise with no message" is to not spend
            --  time computing a nice user message, because it will be
            --  thrown away. I'm not clear whether 'with ""' or the
            --  GNAT default is faster, but it probably doesn't matter
            --  much.
            raise Parse_Error with "";
         end if;
      end if;

      Find_Next (Analyzer, Look_Ahead => not Actively);

      if Trace_Parse then
         Trace_Put ("...succeeded"); Ada.Text_IO.New_Line;
         Trace_Indent := Trace_Indent - 1;
      end if;
   exception
   when others =>
      if Trace_Parse then
         Trace_Put ("...failed"); Ada.Text_IO.New_Line;
         Trace_Indent := Trace_Indent - 1;
      end if;
      raise;
   end Parse;

   overriding function Name (Token : in Instance) return String
   is begin
      if Token.Name = null then
         return Token_ID'Image (Token.ID);
      else
         return Token.Name.all;
      end if;
   end Name;

end OpenToken.Token.Enumerated;