This file is indexed.

/usr/share/ada/adainclude/gnatprj/erroutc.ads is in libgnatprj4.6-dev 4.6.3-8.

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
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
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
------------------------------------------------------------------------------
--                                                                          --
--                         GNAT COMPILER COMPONENTS                         --
--                                                                          --
--                              E R R O U T C                               --
--                                                                          --
--                                 S p e c                                  --
--                                                                          --
--          Copyright (C) 1992-2010, 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 packages contains global variables and routines common to error
--  reporting packages, including Errout and Prj.Err.

with Table;
with Types; use Types;

package Erroutc is

   Class_Flag : Boolean := False;
   --  This flag is set True when outputting a reference to a class-wide
   --  type, and is used by Add_Class to insert 'Class at the proper point

   Continuation : Boolean := False;
   --  Indicates if current message is a continuation. Initialized from the
   --  Msg_Cont parameter in Error_Msg_Internal and then set True if a \
   --  insertion character is encountered.

   Continuation_New_Line : Boolean := False;
   --  Indicates if current message was a continuation line marked with \\ to
   --  force a new line. Set True if \\ encountered.

   Flag_Source : Source_File_Index;
   --  Source file index for source file where error is being posted

   Is_Warning_Msg : Boolean := False;
   --  Set True to indicate if current message is warning message

   Is_Style_Msg : Boolean := False;
   --  Set True to indicate if the current message is a style message
   --  (i.e. a message whose text starts with the characters "(style)").

   Is_Serious_Error : Boolean := False;
   --  Set by Set_Msg_Text to indicate if current message is serious error

   Is_Unconditional_Msg : Boolean := False;
   --  Set by Set_Msg_Text to indicate if current message is unconditional

   Kill_Message : Boolean := False;
   --  A flag used to kill weird messages (e.g. those containing uninterpreted
   --  implicit type references) if we have already seen at least one message
   --  already. The idea is that we hope the weird message is a junk cascaded
   --  message that should be suppressed.

   Last_Killed : Boolean := False;
   --  Set True if the most recently posted non-continuation message was
   --  killed. This is used to determine the processing of any continuation
   --  messages that follow.

   List_Pragmas_Index : Int := 0;
   --  Index into List_Pragmas table

   List_Pragmas_Mode : Boolean := False;
   --  Starts True, gets set False by pragma List (Off), True by List (On)

   Manual_Quote_Mode : Boolean := False;
   --  Set True in manual quotation mode

   Max_Msg_Length : constant := 1024 + 2 * Int (Column_Number'Last);
   --  Maximum length of error message. The addition of 2 * Column_Number'Last
   --  ensures that two insertion tokens of maximum length can be accommodated.
   --  The value of 1024 is an arbitrary value that should be more than long
   --  enough to accommodate any reasonable message (and for that matter, some
   --  pretty unreasonable messages!)

   Msg_Buffer : String (1 .. Max_Msg_Length);
   --  Buffer used to prepare error messages

   Msglen : Integer := 0;
   --  Number of characters currently stored in the message buffer

   Suppress_Message : Boolean;
   --  A flag used to suppress certain obviously redundant messages (i.e.
   --  those referring to a node whose type is Any_Type). This suppression
   --  is effective only if All_Errors_Mode is off.

   Suppress_Instance_Location : Boolean := False;
   --  Normally, if a # location in a message references a location within
   --  a generic template, then a note is added giving the location of the
   --  instantiation. If this variable is set True, then this note is not
   --  output. This is used for internal processing for the case of an
   --  illegal instantiation. See Error_Msg routine for further details.

   ----------------------------
   -- Message ID Definitions --
   ----------------------------

   type Error_Msg_Id is new Int;
   --  A type used to represent specific error messages. Used by the clients
   --  of this package only in the context of the Get_Error_Id and
   --  Change_Error_Text subprograms.

   No_Error_Msg : constant Error_Msg_Id := 0;
   --  A constant which is different from any value returned by Get_Error_Id.
   --  Typically used by a client to indicate absence of a saved Id value.

   Cur_Msg : Error_Msg_Id := No_Error_Msg;
   --  Id of most recently posted error message

   function Get_Msg_Id return Error_Msg_Id;
   --  Returns the Id of the message most recently posted using one of the
   --  Error_Msg routines.

   function Get_Location (E : Error_Msg_Id) return Source_Ptr;
   --  Returns the flag location of the error message with the given id E

   -----------------------------------
   -- Error Message Data Structures --
   -----------------------------------

   --  The error messages are stored as a linked list of error message objects
   --  sorted into ascending order by the source location (Sloc). Each object
   --  records the text of the message and its source location.

   --  The following record type and table are used to represent error
   --  messages, with one entry in the table being allocated for each message.

   type Error_Msg_Object is record
      Text : String_Ptr;
      --  Text of error message, fully expanded with all insertions

      Next : Error_Msg_Id;
      --  Pointer to next message in error chain. A value of No_Error_Msg
      --  indicates the end of the chain.

      Prev : Error_Msg_Id;
      --  Pointer to previous message in error chain. Only set during the
      --  Finalize procedure. A value of No_Error_Msg indicates the first
      --  message in the chain.

      Sfile : Source_File_Index;
      --  Source table index of source file. In the case of an error that
      --  refers to a template, always references the original template
      --  not an instantiation copy.

      Sptr : Source_Ptr;
      --  Flag pointer. In the case of an error that refers to a template,
      --  always references the original template, not an instantiation copy.
      --  This value is the actual place in the source that the error message
      --  will be posted. Note that an error placed on an instantiation will
      --  have Sptr pointing to the instantiation point.

      Optr : Source_Ptr;
      --  Flag location used in the call to post the error. This is normally
      --  the same as Sptr, except when an error is posted on a particular
      --  instantiation of a generic. In such a case, Sptr will point to
      --  the original source location of the instantiation itself, but
      --  Optr will point to the template location (more accurately to the
      --  template copy in the instantiation copy corresponding to the
      --  instantiation referenced by Sptr).

      Line : Physical_Line_Number;
      --  Line number for error message

      Col : Column_Number;
      --  Column number for error message

      Warn : Boolean;
      --  True if warning message (i.e. insertion character ? appeared)

      Style : Boolean;
      --  True if style message (starts with "(style)")

      Serious : Boolean;
      --  True if serious error message (not a warning and no | character)

      Uncond : Boolean;
      --  True if unconditional message (i.e. insertion character ! appeared)

      Msg_Cont : Boolean;
      --  This is used for logical messages that are composed of multiple
      --  individual messages. For messages that are not part of such a
      --  group, or that are the first message in such a group. Msg_Cont
      --  is set to False. For subsequent messages in a group, Msg_Cont
      --  is set to True. This is used to make sure that such a group of
      --  messages is either suppressed or retained as a group (e.g. in
      --  the circuit that deletes identical messages).

      Deleted : Boolean;
      --  If this flag is set, the message is not printed. This is used
      --  in the circuit for deleting duplicate/redundant error messages.
   end record;

   package Errors is new Table.Table (
     Table_Component_Type => Error_Msg_Object,
     Table_Index_Type     => Error_Msg_Id,
     Table_Low_Bound      => 1,
     Table_Initial        => 200,
     Table_Increment      => 200,
     Table_Name           => "Error");

   First_Error_Msg : Error_Msg_Id;
   --  The list of error messages, i.e. the first entry on the list of error
   --  messages. This is not the same as the physically first entry in the
   --  error message table, since messages are not always inserted in sequence.

   Last_Error_Msg : Error_Msg_Id;
   --  The last entry on the list of error messages. Note that this is not
   --  the same as the physically last entry in the error message table, since
   --  messages are not always inserted in sequence.

   --------------------------
   -- Warning Mode Control --
   --------------------------

   --  Pragma Warnings allows warnings to be turned off for a specified
   --  region of code, and the following tables are the data structure used
   --  to keep track of these regions.

   --  The first table is used for the basic command line control, and for
   --  the forms of Warning with a single ON or OFF parameter

   --  It contains pairs of source locations, the first being the start
   --  location for a warnings off region, and the second being the end
   --  location. When a pragma Warnings (Off) is encountered, a new entry
   --  is established extending from the location of the pragma to the
   --  end of the current source file. A subsequent pragma Warnings (On)
   --  adjusts the end point of this entry appropriately.

   --  If all warnings are suppressed by command switch, then there is a
   --  dummy entry (put there by Errout.Initialize) at the start of the
   --  table which covers all possible Source_Ptr values. Note that the
   --  source pointer values in this table always reference the original
   --  template, not an instantiation copy, in the generic case.

   type Warnings_Entry is record
      Start : Source_Ptr;
      Stop  : Source_Ptr;
   end record;

   package Warnings is new Table.Table (
     Table_Component_Type => Warnings_Entry,
     Table_Index_Type     => Natural,
     Table_Low_Bound      => 1,
     Table_Initial        => 100,
     Table_Increment      => 200,
     Table_Name           => "Warnings");

   --  The second table is used for the specific forms of the pragma, where
   --  the first argument is ON or OFF, and the second parameter is a string
   --  which is the entire message to suppress, or a prefix of it.

   type Specific_Warning_Entry is record
      Start : Source_Ptr;
      Stop  : Source_Ptr;
      --  Starting and ending source pointers for the range. These are always
      --  from the same source file.

      Msg : String_Ptr;
      --  Message from pragma Warnings (Off, string)

      Open : Boolean;
      --  Set to True if OFF has been encountered with no matching ON

      Used : Boolean;
      --  Set to True if entry has been used to suppress a warning

      Config : Boolean;
      --  True if pragma is configuration pragma (in which case no matching
      --  Off pragma is required, and it is not required that a specific
      --  warning be suppressed).
   end record;

   package Specific_Warnings is new Table.Table (
     Table_Component_Type => Specific_Warning_Entry,
     Table_Index_Type     => Natural,
     Table_Low_Bound      => 1,
     Table_Initial        => 100,
     Table_Increment      => 200,
     Table_Name           => "Specific_Warnings");

   --  Note on handling configuration case versus specific case. A complication
   --  arises from this example:

   --     pragma Warnings (Off, "not referenced*");
   --     procedure Mumble (X : Integer) is
   --     pragma Warnings (On, "not referenced*");
   --     begin
   --        null;
   --     end Mumble;

   --  The trouble is that the first pragma is technically a configuration
   --  pragma, and yet it is clearly being used in the context of thinking
   --  of it as a specific case. To deal with this, what we do is that the
   --  On entry can match a configuration pragma from the same file, and if
   --  we find such an On entry, we cancel the indication of it being the
   --  configuration case. This seems to handle all cases we run into ok.

   -----------------
   -- Subprograms --
   -----------------

   procedure Add_Class;
   --  Add 'Class to buffer for class wide type case (Class_Flag set)

   function Buffer_Ends_With (S : String) return Boolean;
   --  Tests if message buffer ends with given string preceded by a space

   procedure Buffer_Remove (S : String);
   --  Removes given string from end of buffer if it is present
   --  at end of buffer, and preceded by a space.

   function Compilation_Errors return Boolean;
   --  Returns true if errors have been detected, or warnings in -gnatwe
   --  (treat warnings as errors) mode.

   procedure dmsg (Id : Error_Msg_Id);
   --  Debugging routine to dump an error message

   procedure Debug_Output (N : Node_Id);
   --  Called from Error_Msg_N and Error_Msg_NE to generate line of debug
   --  output giving node number (of node N) if the debug X switch is set.

   procedure Check_Duplicate_Message (M1, M2 : Error_Msg_Id);
   --  This function is passed the Id values of two error messages. If
   --  either M1 or M2 is a continuation message, or is already deleted,
   --  the call is ignored. Otherwise a check is made to see if M1 and M2
   --  are duplicated or redundant. If so, the message to be deleted and
   --  all its continuations are marked with the Deleted flag set to True.

   procedure Output_Error_Msgs (E : in out Error_Msg_Id);
   --  Output source line, error flag, and text of stored error message and
   --  all subsequent messages for the same line and unit. On return E is
   --  set to be one higher than the last message output.

   procedure Output_Line_Number (L : Logical_Line_Number);
   --  Output a line number as six digits (with leading zeroes suppressed),
   --  followed by a period and a blank (note that this is 8 characters which
   --  means that tabs in the source line will not get messed up). Line numbers
   --  that match or are less than the last Source_Reference pragma are listed
   --  as all blanks, avoiding output of junk line numbers.

   procedure Output_Msg_Text (E : Error_Msg_Id);
   --  Outputs characters of text in the text of the error message E. Note that
   --  no end of line is output, the caller is responsible for adding the end
   --  of line. If Error_Msg_Line_Length is non-zero, this is the routine that
   --  splits the line generating multiple lines of output, and in this case
   --  the last line has no terminating end of line character.

   procedure Purge_Messages (From : Source_Ptr; To : Source_Ptr);
   --  All error messages whose location is in the range From .. To (not
   --  including the end points) will be deleted from the error listing.

   function Same_Error (M1, M2 : Error_Msg_Id) return Boolean;
   --  See if two messages have the same text. Returns true if the text
   --  of the two messages is identical, or if one of them is the same
   --  as the other with an appended "instance at xxx" tag.

   procedure Set_Msg_Blank;
   --  Sets a single blank in the message if the preceding character is a
   --  non-blank character other than a left parenthesis or minus. Has no
   --  effect if manual quote mode is turned on.

   procedure Set_Msg_Blank_Conditional;
   --  Sets a single blank in the message if the preceding character is a
   --  non-blank character other than a left parenthesis or quote. Has no
   --  effect if manual quote mode is turned on.

   procedure Set_Msg_Char (C : Character);
   --  Add a single character to the current message. This routine does not
   --  check for special insertion characters (they are just treated as text
   --  characters if they occur).

   procedure Set_Msg_Insertion_File_Name;
   --  Handle file name insertion (left brace insertion character)

   procedure Set_Msg_Insertion_Line_Number (Loc, Flag : Source_Ptr);
   --  Handle line number insertion (# insertion character). Loc is the
   --  location to be referenced, and Flag is the location at which the
   --  flag is posted (used to determine whether to add "in file xxx")

   procedure Set_Msg_Insertion_Name_Literal;

   procedure Set_Msg_Insertion_Name;
   --  Handle name insertion (% insertion character)

   procedure Set_Msg_Insertion_Reserved_Name;
   --  Handle insertion of reserved word name (* insertion character)

   procedure Set_Msg_Insertion_Reserved_Word
     (Text : String;
      J    : in out Integer);
   --  Handle reserved word insertion (upper case letters). The Text argument
   --  is the current error message input text, and J is an index which on
   --  entry points to the first character of the reserved word, and on exit
   --  points past the last character of the reserved word.

   procedure Set_Msg_Insertion_Run_Time_Name;
   --  If package System contains a definition for Run_Time_Name (see package
   --  Targparm for details), then this procedure will insert a message of
   --  the form (name) into the current error message, with name set in mixed
   --  case (upper case after any spaces). If no run time name is defined,
   --  then this routine has no effect).

   procedure Set_Msg_Insertion_Uint;
   --  Handle Uint insertion (^ insertion character)

   procedure Set_Msg_Int (Line : Int);
   --  Set the decimal representation of the argument in the error message
   --  buffer with no leading zeroes output.

   procedure Set_Msg_Name_Buffer;
   --  Output name from Name_Buffer, with surrounding quotes unless manual
   --  quotation mode is in effect.

   procedure Set_Msg_Quote;
   --  Set quote if in normal quote mode, nothing if in manual quote mode

   procedure Set_Msg_Str (Text : String);
   --  Add a sequence of characters to the current message. This routine does
   --  not check for special insertion characters (they are just treated as
   --  text characters if they occur).

   procedure Set_Next_Non_Deleted_Msg (E : in out Error_Msg_Id);
   --  Given a message id, move to next message id, but skip any deleted
   --  messages, so that this results in E on output being the first non-
   --  deleted message following the input value of E, or No_Error_Msg if
   --  the input value of E was either already No_Error_Msg, or was the
   --  last non-deleted message.

   procedure Set_Specific_Warning_Off
     (Loc    : Source_Ptr;
      Msg    : String;
      Config : Boolean);
   --  This is called in response to the two argument form of pragma Warnings
   --  where the first argument is OFF, and the second argument is a string
   --  which identifies a specific warning to be suppressed. The first argument
   --  is the start of the suppression range, and the second argument is the
   --  string from the pragma. Loc is the location of the pragma (which is the
   --  start of the range to suppress). Config is True for the configuration
   --  pragma case (where there is no requirement for a matching OFF pragma).

   procedure Set_Specific_Warning_On
     (Loc : Source_Ptr;
      Msg : String;
      Err : out Boolean);
   --  This is called in response to the two argument form of pragma Warnings
   --  where the first argument is ON, and the second argument is a string
   --  which identifies a specific warning to be suppressed. The first argument
   --  is the end of the suppression range, and the second argument is the
   --  string from the pragma. Err is set to True on return to report the error
   --  of no matching Warnings Off pragma preceding this one.

   procedure Set_Warnings_Mode_Off (Loc : Source_Ptr);
   --  Called in response to a pragma Warnings (Off) to record the source
   --  location from which warnings are to be turned off.

   procedure Set_Warnings_Mode_On (Loc : Source_Ptr);
   --  Called in response to a pragma Warnings (On) to record the source
   --  location from which warnings are to be turned back on.

   procedure Test_Style_Warning_Serious_Msg (Msg : String);
   --  Sets Is_Warning_Msg true if Msg is a warning message (contains a
   --  question mark character), and False otherwise. Is_Style_Msg is set true
   --  if Msg is a style message (starts with "(style)". Sets Is_Serious_Error
   --  True unless the message is a warning or style/info message or contains
   --  the character | indicating a non-serious error message. Note that the
   --  call has no effect for continuation messages (those whose first
   --  character is '\').

   function Warnings_Suppressed (Loc : Source_Ptr) return Boolean;
   --  Determines if given location is covered by a warnings off suppression
   --  range in the warnings table (or is suppressed by compilation option,
   --  which generates a warning range for the whole source file). This routine
   --  only deals with the general ON/OFF case, not specific warnings. True
   --  is also returned if warnings are globally suppressed.

   function Warning_Specifically_Suppressed
     (Loc : Source_Ptr;
      Msg : String_Ptr) return Boolean;
   --  Determines if given message to be posted at given location is suppressed
   --  by specific ON/OFF Warnings pragmas specifying this particular message.

   type Error_Msg_Proc is
     access procedure (Msg : String; Flag_Location : Source_Ptr);
   procedure Validate_Specific_Warnings (Eproc : Error_Msg_Proc);
   --  Checks that specific warnings are consistent (for non-configuration
   --  case, properly closed, and used). The argument is a pointer to the
   --  Error_Msg procedure to be called if any inconsistencies are detected.

end Erroutc;