File : errout.adb
1 ------------------------------------------------------------------------------
2 -- --
3 -- GNAT COMPILER COMPONENTS --
4 -- --
5 -- E R R O U T --
6 -- --
7 -- B o d y --
8 -- --
9 -- Copyright (C) 1992-2016, Free Software Foundation, Inc. --
10 -- --
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. --
20 -- --
21 -- GNAT was originally developed by the GNAT team at New York University. --
22 -- Extensive contributions were provided by Ada Core Technologies Inc. --
23 -- --
24 ------------------------------------------------------------------------------
25
26 -- Warning: Error messages can be generated during Gigi processing by direct
27 -- calls to error message routines, so it is essential that the processing
28 -- in this body be consistent with the requirements for the Gigi processing
29 -- environment, and that in particular, no disallowed table expansion is
30 -- allowed to occur.
31
32 with Atree; use Atree;
33 with Casing; use Casing;
34 with Csets; use Csets;
35 with Debug; use Debug;
36 with Einfo; use Einfo;
37 with Erroutc; use Erroutc;
38 with Fname; use Fname;
39 with Gnatvsn; use Gnatvsn;
40 with Lib; use Lib;
41 with Opt; use Opt;
42 with Nlists; use Nlists;
43 with Output; use Output;
44 with Scans; use Scans;
45 with Sem_Aux; use Sem_Aux;
46 with Sinput; use Sinput;
47 with Sinfo; use Sinfo;
48 with Snames; use Snames;
49 with Stand; use Stand;
50 with Stylesw; use Stylesw;
51 with Uname; use Uname;
52
53 package body Errout is
54
55 Errors_Must_Be_Ignored : Boolean := False;
56 -- Set to True by procedure Set_Ignore_Errors (True), when calls to error
57 -- message procedures should be ignored (when parsing irrelevant text in
58 -- sources being preprocessed).
59
60 Finalize_Called : Boolean := False;
61 -- Set True if the Finalize routine has been called
62
63 Warn_On_Instance : Boolean;
64 -- Flag set true for warning message to be posted on instance
65
66 ------------------------------------
67 -- Table of Non-Instance Messages --
68 ------------------------------------
69
70 -- This table contains an entry for every error message processed by the
71 -- Error_Msg routine that is not posted on generic (or inlined) instance.
72 -- As explained in further detail in the Error_Msg procedure body, this
73 -- table is used to avoid posting redundant messages on instances.
74
75 type NIM_Record is record
76 Msg : String_Ptr;
77 Loc : Source_Ptr;
78 end record;
79 -- Type used to store text and location of one message
80
81 package Non_Instance_Msgs is new Table.Table (
82 Table_Component_Type => NIM_Record,
83 Table_Index_Type => Int,
84 Table_Low_Bound => 1,
85 Table_Initial => 100,
86 Table_Increment => 100,
87 Table_Name => "Non_Instance_Msgs");
88
89 -----------------------
90 -- Local Subprograms --
91 -----------------------
92
93 procedure Error_Msg_Internal
94 (Msg : String;
95 Sptr : Source_Ptr;
96 Optr : Source_Ptr;
97 Msg_Cont : Boolean);
98 -- This is the low level routine used to post messages after dealing with
99 -- the issue of messages placed on instantiations (which get broken up
100 -- into separate calls in Error_Msg). Sptr is the location on which the
101 -- flag will be placed in the output. In the case where the flag is on
102 -- the template, this points directly to the template, not to one of the
103 -- instantiation copies of the template. Optr is the original location
104 -- used to flag the error, and this may indeed point to an instantiation
105 -- copy. So typically we can see Optr pointing to the template location
106 -- in an instantiation copy when Sptr points to the source location of
107 -- the actual instantiation (i.e the line with the new). Msg_Cont is
108 -- set true if this is a continuation message.
109
110 function No_Warnings (N : Node_Or_Entity_Id) return Boolean;
111 -- Determines if warnings should be suppressed for the given node
112
113 function OK_Node (N : Node_Id) return Boolean;
114 -- Determines if a node is an OK node to place an error message on (return
115 -- True) or if the error message should be suppressed (return False). A
116 -- message is suppressed if the node already has an error posted on it,
117 -- or if it refers to an Etype that has an error posted on it, or if
118 -- it references an Entity that has an error posted on it.
119
120 procedure Output_Source_Line
121 (L : Physical_Line_Number;
122 Sfile : Source_File_Index;
123 Errs : Boolean);
124 -- Outputs text of source line L, in file S, together with preceding line
125 -- number, as described above for Output_Line_Number. The Errs parameter
126 -- indicates if there are errors attached to the line, which forces
127 -- listing on, even in the presence of pragma List (Off).
128
129 procedure Set_Msg_Insertion_Column;
130 -- Handle column number insertion (@ insertion character)
131
132 procedure Set_Msg_Insertion_Node;
133 -- Handle node (name from node) insertion (& insertion character)
134
135 procedure Set_Msg_Insertion_Type_Reference (Flag : Source_Ptr);
136 -- Handle type reference (right brace insertion character). Flag is the
137 -- location of the flag, which is provided for the internal call to
138 -- Set_Msg_Insertion_Line_Number,
139
140 procedure Set_Msg_Insertion_Unit_Name (Suffix : Boolean := True);
141 -- Handle unit name insertion ($ insertion character). Depending on Boolean
142 -- parameter Suffix, (spec) or (body) is appended after the unit name.
143
144 procedure Set_Msg_Node (Node : Node_Id);
145 -- Add the sequence of characters for the name associated with the given
146 -- node to the current message. For N_Designator, N_Selected_Component,
147 -- N_Defining_Program_Unit_Name, and N_Expanded_Name, the Prefix is
148 -- included as well.
149
150 procedure Set_Msg_Text (Text : String; Flag : Source_Ptr);
151 -- Add a sequence of characters to the current message. The characters may
152 -- be one of the special insertion characters (see documentation in spec).
153 -- Flag is the location at which the error is to be posted, which is used
154 -- to determine whether or not the # insertion needs a file name. The
155 -- variables Msg_Buffer are set on return Msglen.
156
157 procedure Set_Posted (N : Node_Id);
158 -- Sets the Error_Posted flag on the given node, and all its parents that
159 -- are subexpressions and then on the parent non-subexpression construct
160 -- that contains the original expression. If that parent is a named
161 -- association, the flag is further propagated to its parent. This is done
162 -- in order to guard against cascaded errors. Note that this call has an
163 -- effect for a serious error only.
164
165 procedure Set_Qualification (N : Nat; E : Entity_Id);
166 -- Outputs up to N levels of qualification for the given entity. For
167 -- example, the entity A.B.C.D will output B.C. if N = 2.
168
169 function Special_Msg_Delete
170 (Msg : String;
171 N : Node_Or_Entity_Id;
172 E : Node_Or_Entity_Id) return Boolean;
173 -- This function is called from Error_Msg_NEL, passing the message Msg,
174 -- node N on which the error is to be posted, and the entity or node E
175 -- to be used for an & insertion in the message if any. The job of this
176 -- procedure is to test for certain cascaded messages that we would like
177 -- to suppress. If the message is to be suppressed then we return True.
178 -- If the message should be generated (the normal case) False is returned.
179
180 procedure Unwind_Internal_Type (Ent : in out Entity_Id);
181 -- This procedure is given an entity id for an internal type, i.e. a type
182 -- with an internal name. It unwinds the type to try to get to something
183 -- reasonably printable, generating prefixes like "subtype of", "access
184 -- to", etc along the way in the buffer. The value in Ent on return is the
185 -- final name to be printed. Hopefully this is not an internal name, but in
186 -- some internal name cases, it is an internal name, and has to be printed
187 -- anyway (although in this case the message has been killed if possible).
188 -- The global variable Class_Flag is set to True if the resulting entity
189 -- should have 'Class appended to its name (see Add_Class procedure), and
190 -- is otherwise unchanged.
191
192 function Warn_Insertion return String;
193 -- This is called for warning messages only (so Warning_Msg_Char is set)
194 -- and returns a corresponding string to use at the beginning of generated
195 -- auxiliary messages, such as "in instantiation at ...".
196 -- 'a' .. 'z' returns "?x?"
197 -- 'A' .. 'Z' returns "?X?"
198 -- '*' returns "?*?"
199 -- '$' returns "?$?info: "
200 -- ' ' returns " "
201 -- No other settings are valid
202
203 -----------------------
204 -- Change_Error_Text --
205 -----------------------
206
207 procedure Change_Error_Text (Error_Id : Error_Msg_Id; New_Msg : String) is
208 Save_Next : Error_Msg_Id;
209 Err_Id : Error_Msg_Id := Error_Id;
210
211 begin
212 Set_Msg_Text (New_Msg, Errors.Table (Error_Id).Sptr);
213 Errors.Table (Error_Id).Text := new String'(Msg_Buffer (1 .. Msglen));
214
215 -- If in immediate error message mode, output modified error message now
216 -- This is just a bit tricky, because we want to output just a single
217 -- message, and the messages we modified is already linked in. We solve
218 -- this by temporarily resetting its forward pointer to empty.
219
220 if Debug_Flag_OO then
221 Save_Next := Errors.Table (Error_Id).Next;
222 Errors.Table (Error_Id).Next := No_Error_Msg;
223 Write_Eol;
224 Output_Source_Line
225 (Errors.Table (Error_Id).Line, Errors.Table (Error_Id).Sfile, True);
226 Output_Error_Msgs (Err_Id);
227 Errors.Table (Error_Id).Next := Save_Next;
228 end if;
229 end Change_Error_Text;
230
231 ------------------------
232 -- Compilation_Errors --
233 ------------------------
234
235 function Compilation_Errors return Boolean is
236 begin
237 if not Finalize_Called then
238 raise Program_Error;
239 else
240 return Erroutc.Compilation_Errors;
241 end if;
242 end Compilation_Errors;
243
244 --------------------------------------
245 -- Delete_Warning_And_Continuations --
246 --------------------------------------
247
248 procedure Delete_Warning_And_Continuations (Msg : Error_Msg_Id) is
249 Id : Error_Msg_Id;
250
251 begin
252 pragma Assert (not Errors.Table (Msg).Msg_Cont);
253
254 Id := Msg;
255 loop
256 declare
257 M : Error_Msg_Object renames Errors.Table (Id);
258
259 begin
260 if not M.Deleted then
261 M.Deleted := True;
262 Warnings_Detected := Warnings_Detected - 1;
263
264 if M.Info then
265 Info_Messages := Info_Messages - 1;
266 end if;
267
268 if M.Warn_Err then
269 Warnings_Treated_As_Errors := Warnings_Treated_As_Errors - 1;
270 end if;
271 end if;
272
273 Id := M.Next;
274 exit when Id = No_Error_Msg;
275 exit when not Errors.Table (Id).Msg_Cont;
276 end;
277 end loop;
278 end Delete_Warning_And_Continuations;
279
280 ---------------
281 -- Error_Msg --
282 ---------------
283
284 -- Error_Msg posts a flag at the given location, except that if the
285 -- Flag_Location points within a generic template and corresponds to an
286 -- instantiation of this generic template, then the actual message will be
287 -- posted on the generic instantiation, along with additional messages
288 -- referencing the generic declaration.
289
290 procedure Error_Msg (Msg : String; Flag_Location : Source_Ptr) is
291 Sindex : Source_File_Index;
292 -- Source index for flag location
293
294 Orig_Loc : Source_Ptr;
295 -- Original location of Flag_Location (i.e. location in original
296 -- template in instantiation case, otherwise unchanged).
297
298 begin
299 -- It is a fatal error to issue an error message when scanning from the
300 -- internal source buffer (see Sinput for further documentation)
301
302 pragma Assert (Sinput.Source /= Internal_Source_Ptr);
303
304 -- Return if all errors are to be ignored
305
306 if Errors_Must_Be_Ignored then
307 return;
308 end if;
309
310 -- If we already have messages, and we are trying to place a message at
311 -- No_Location, then just ignore the attempt since we assume that what
312 -- is happening is some cascaded junk. Note that this is safe in the
313 -- sense that proceeding will surely bomb. We will also bomb if the flag
314 -- location is No_Location and we don't have any messages so far, but
315 -- that is a real bug and a legitimate bomb, so we go ahead.
316
317 if Flag_Location = No_Location
318 and then Total_Errors_Detected > 0
319 then
320 return;
321 end if;
322
323 -- Start of processing for new message
324
325 Sindex := Get_Source_File_Index (Flag_Location);
326 Prescan_Message (Msg);
327 Orig_Loc := Original_Location (Flag_Location);
328
329 -- If the current location is in an instantiation, the issue arises of
330 -- whether to post the message on the template or the instantiation.
331
332 -- The way we decide is to see if we have posted the same message on
333 -- the template when we compiled the template (the template is always
334 -- compiled before any instantiations). For this purpose, we use a
335 -- separate table of messages. The reason we do this is twofold:
336
337 -- First, the messages can get changed by various processing
338 -- including the insertion of tokens etc, making it hard to
339 -- do the comparison.
340
341 -- Second, we will suppress a warning on a template if it is not in
342 -- the current extended source unit. That's reasonable and means we
343 -- don't want the warning on the instantiation here either, but it
344 -- does mean that the main error table would not in any case include
345 -- the message.
346
347 if Flag_Location = Orig_Loc then
348 Non_Instance_Msgs.Append ((new String'(Msg), Flag_Location));
349 Warn_On_Instance := False;
350
351 -- Here we have an instance message
352
353 else
354 -- Delete if debug flag off, and this message duplicates a message
355 -- already posted on the corresponding template
356
357 if not Debug_Flag_GG then
358 for J in Non_Instance_Msgs.First .. Non_Instance_Msgs.Last loop
359 if Msg = Non_Instance_Msgs.Table (J).Msg.all
360 and then Non_Instance_Msgs.Table (J).Loc = Orig_Loc
361 then
362 return;
363 end if;
364 end loop;
365 end if;
366
367 -- No duplicate, so error/warning will be posted on instance
368
369 Warn_On_Instance := Is_Warning_Msg;
370 end if;
371
372 -- Ignore warning message that is suppressed for this location. Note
373 -- that style checks are not considered warning messages for this
374 -- purpose.
375
376 if Is_Warning_Msg and then Warnings_Suppressed (Orig_Loc) /= No_String
377 then
378 return;
379
380 -- For style messages, check too many messages so far
381
382 elsif Is_Style_Msg
383 and then Maximum_Messages /= 0
384 and then Warnings_Detected >= Maximum_Messages
385 then
386 return;
387 end if;
388
389 -- The idea at this stage is that we have two kinds of messages
390
391 -- First, we have those messages that are to be placed as requested at
392 -- Flag_Location. This includes messages that have nothing to do with
393 -- generics, and also messages placed on generic templates that reflect
394 -- an error in the template itself. For such messages we simply call
395 -- Error_Msg_Internal to place the message in the requested location.
396
397 if Instantiation (Sindex) = No_Location then
398 Error_Msg_Internal (Msg, Flag_Location, Flag_Location, False);
399 return;
400 end if;
401
402 -- If we are trying to flag an error in an instantiation, we may have
403 -- a generic contract violation. What we generate in this case is:
404
405 -- instantiation error at ...
406 -- original error message
407
408 -- or
409
410 -- warning: in instantiation at
411 -- warning: original warning message
412
413 -- All these messages are posted at the location of the top level
414 -- instantiation. If there are nested instantiations, then the
415 -- instantiation error message can be repeated, pointing to each
416 -- of the relevant instantiations.
417
418 -- Note: the instantiation mechanism is also shared for inlining of
419 -- subprogram bodies when front end inlining is done. In this case the
420 -- messages have the form:
421
422 -- in inlined body at ...
423 -- original error message
424
425 -- or
426
427 -- warning: in inlined body at
428 -- warning: original warning message
429
430 -- OK, here we have an instantiation error, and we need to generate the
431 -- error on the instantiation, rather than on the template.
432
433 declare
434 Actual_Error_Loc : Source_Ptr;
435 -- Location of outer level instantiation in instantiation case, or
436 -- just a copy of Flag_Location in the normal case. This is the
437 -- location where all error messages will actually be posted.
438
439 Save_Error_Msg_Sloc : constant Source_Ptr := Error_Msg_Sloc;
440 -- Save possible location set for caller's message. We need to use
441 -- Error_Msg_Sloc for the location of the instantiation error but we
442 -- have to preserve a possible original value.
443
444 X : Source_File_Index;
445
446 Msg_Cont_Status : Boolean;
447 -- Used to label continuation lines in instantiation case with
448 -- proper Msg_Cont status.
449
450 begin
451 -- Loop to find highest level instantiation, where all error
452 -- messages will be placed.
453
454 X := Sindex;
455 loop
456 Actual_Error_Loc := Instantiation (X);
457 X := Get_Source_File_Index (Actual_Error_Loc);
458 exit when Instantiation (X) = No_Location;
459 end loop;
460
461 -- Since we are generating the messages at the instantiation point in
462 -- any case, we do not want the references to the bad lines in the
463 -- instance to be annotated with the location of the instantiation.
464
465 Suppress_Instance_Location := True;
466 Msg_Cont_Status := False;
467
468 -- Loop to generate instantiation messages
469
470 Error_Msg_Sloc := Flag_Location;
471 X := Get_Source_File_Index (Flag_Location);
472 while Instantiation (X) /= No_Location loop
473
474 -- Suppress instantiation message on continuation lines
475
476 if Msg (Msg'First) /= '\' then
477
478 -- Case of inlined body
479
480 if Inlined_Body (X) then
481 if Is_Warning_Msg or Is_Style_Msg then
482 Error_Msg_Internal
483 (Warn_Insertion & "in inlined body #",
484 Actual_Error_Loc, Flag_Location, Msg_Cont_Status);
485 else
486 Error_Msg_Internal
487 ("error in inlined body #",
488 Actual_Error_Loc, Flag_Location, Msg_Cont_Status);
489 end if;
490
491 -- Case of generic instantiation
492
493 else
494 if Is_Warning_Msg or else Is_Style_Msg then
495 Error_Msg_Internal
496 (Warn_Insertion & "in instantiation #",
497 Actual_Error_Loc, Flag_Location, Msg_Cont_Status);
498 else
499 Error_Msg_Internal
500 ("instantiation error #",
501 Actual_Error_Loc, Flag_Location, Msg_Cont_Status);
502 end if;
503 end if;
504 end if;
505
506 Error_Msg_Sloc := Instantiation (X);
507 X := Get_Source_File_Index (Error_Msg_Sloc);
508 Msg_Cont_Status := True;
509 end loop;
510
511 Suppress_Instance_Location := False;
512 Error_Msg_Sloc := Save_Error_Msg_Sloc;
513
514 -- Here we output the original message on the outer instantiation
515
516 Error_Msg_Internal
517 (Msg, Actual_Error_Loc, Flag_Location, Msg_Cont_Status);
518 end;
519 end Error_Msg;
520
521 --------------------------------
522 -- Error_Msg_Ada_2012_Feature --
523 --------------------------------
524
525 procedure Error_Msg_Ada_2012_Feature (Feature : String; Loc : Source_Ptr) is
526 begin
527 if Ada_Version < Ada_2012 then
528 Error_Msg (Feature & " is an Ada 2012 feature", Loc);
529
530 if No (Ada_Version_Pragma) then
531 Error_Msg ("\unit must be compiled with -gnat2012 switch", Loc);
532 else
533 Error_Msg_Sloc := Sloc (Ada_Version_Pragma);
534 Error_Msg ("\incompatible with Ada version set#", Loc);
535 end if;
536 end if;
537 end Error_Msg_Ada_2012_Feature;
538
539 ------------------
540 -- Error_Msg_AP --
541 ------------------
542
543 procedure Error_Msg_AP (Msg : String) is
544 S1 : Source_Ptr;
545 C : Character;
546
547 begin
548 -- If we had saved the Scan_Ptr value after scanning the previous
549 -- token, then we would have exactly the right place for putting
550 -- the flag immediately at hand. However, that would add at least
551 -- two instructions to a Scan call *just* to service the possibility
552 -- of an Error_Msg_AP call. So instead we reconstruct that value.
553
554 -- We have two possibilities, start with Prev_Token_Ptr and skip over
555 -- the current token, which is made harder by the possibility that this
556 -- token may be in error, or start with Token_Ptr and work backwards.
557 -- We used to take the second approach, but it's hard because of
558 -- comments, and harder still because things that look like comments
559 -- can appear inside strings. So now we take the first approach.
560
561 -- Note: in the case where there is no previous token, Prev_Token_Ptr
562 -- is set to Source_First, which is a reasonable position for the
563 -- error flag in this situation.
564
565 S1 := Prev_Token_Ptr;
566 C := Source (S1);
567
568 -- If the previous token is a string literal, we need a special approach
569 -- since there may be white space inside the literal and we don't want
570 -- to stop on that white space.
571
572 -- Note: since this is an error recovery issue anyway, it is not worth
573 -- worrying about special UTF_32 line terminator characters here.
574
575 if Prev_Token = Tok_String_Literal then
576 loop
577 S1 := S1 + 1;
578
579 if Source (S1) = C then
580 S1 := S1 + 1;
581 exit when Source (S1) /= C;
582 elsif Source (S1) in Line_Terminator then
583 exit;
584 end if;
585 end loop;
586
587 -- Character literal also needs special handling
588
589 elsif Prev_Token = Tok_Char_Literal then
590 S1 := S1 + 3;
591
592 -- Otherwise we search forward for the end of the current token, marked
593 -- by a line terminator, white space, a comment symbol or if we bump
594 -- into the following token (i.e. the current token).
595
596 -- Again, it is not worth worrying about UTF_32 special line terminator
597 -- characters in this context, since this is only for error recovery.
598
599 else
600 while Source (S1) not in Line_Terminator
601 and then Source (S1) /= ' '
602 and then Source (S1) /= ASCII.HT
603 and then (Source (S1) /= '-' or else Source (S1 + 1) /= '-')
604 and then S1 /= Token_Ptr
605 loop
606 S1 := S1 + 1;
607 end loop;
608 end if;
609
610 -- S1 is now set to the location for the flag
611
612 Error_Msg (Msg, S1);
613 end Error_Msg_AP;
614
615 ------------------
616 -- Error_Msg_BC --
617 ------------------
618
619 procedure Error_Msg_BC (Msg : String) is
620 begin
621 -- If we are at end of file, post the flag after the previous token
622
623 if Token = Tok_EOF then
624 Error_Msg_AP (Msg);
625
626 -- If we are at start of file, post the flag at the current token
627
628 elsif Token_Ptr = Source_First (Current_Source_File) then
629 Error_Msg_SC (Msg);
630
631 -- If the character before the current token is a space or a horizontal
632 -- tab, then we place the flag on this character (in the case of a tab
633 -- we would really like to place it in the "last" character of the tab
634 -- space, but that it too much trouble to worry about).
635
636 elsif Source (Token_Ptr - 1) = ' '
637 or else Source (Token_Ptr - 1) = ASCII.HT
638 then
639 Error_Msg (Msg, Token_Ptr - 1);
640
641 -- If there is no space or tab before the current token, then there is
642 -- no room to place the flag before the token, so we place it on the
643 -- token instead (this happens for example at the start of a line).
644
645 else
646 Error_Msg (Msg, Token_Ptr);
647 end if;
648 end Error_Msg_BC;
649
650 -------------------
651 -- Error_Msg_CRT --
652 -------------------
653
654 procedure Error_Msg_CRT (Feature : String; N : Node_Id) is
655 CNRT : constant String := " not allowed in no run time mode";
656 CCRT : constant String := " not supported by configuration>";
657
658 S : String (1 .. Feature'Length + 1 + CCRT'Length);
659 L : Natural;
660
661 begin
662 S (1) := '|';
663 S (2 .. Feature'Length + 1) := Feature;
664 L := Feature'Length + 2;
665
666 if No_Run_Time_Mode then
667 S (L .. L + CNRT'Length - 1) := CNRT;
668 L := L + CNRT'Length - 1;
669
670 else pragma Assert (Configurable_Run_Time_Mode);
671 S (L .. L + CCRT'Length - 1) := CCRT;
672 L := L + CCRT'Length - 1;
673 end if;
674
675 Error_Msg_N (S (1 .. L), N);
676 Configurable_Run_Time_Violations := Configurable_Run_Time_Violations + 1;
677 end Error_Msg_CRT;
678
679 ------------------
680 -- Error_Msg_PT --
681 ------------------
682
683 procedure Error_Msg_PT (E : Entity_Id; Iface_Prim : Entity_Id) is
684 begin
685 Error_Msg_N
686 ("illegal overriding of subprogram inherited from interface", E);
687
688 Error_Msg_Sloc := Sloc (Iface_Prim);
689
690 if Ekind (E) = E_Function then
691 Error_Msg_N
692 ("\first formal of & declared # must be of mode `IN` "
693 & "or access-to-constant", E);
694 else
695 Error_Msg_N
696 ("\first formal of & declared # must be of mode `OUT`, `IN OUT` "
697 & "or access-to-variable", E);
698 end if;
699 end Error_Msg_PT;
700
701 -----------------
702 -- Error_Msg_F --
703 -----------------
704
705 procedure Error_Msg_F (Msg : String; N : Node_Id) is
706 begin
707 Error_Msg_NEL (Msg, N, N, Sloc (First_Node (N)));
708 end Error_Msg_F;
709
710 ------------------
711 -- Error_Msg_FE --
712 ------------------
713
714 procedure Error_Msg_FE
715 (Msg : String;
716 N : Node_Id;
717 E : Node_Or_Entity_Id)
718 is
719 begin
720 Error_Msg_NEL (Msg, N, E, Sloc (First_Node (N)));
721 end Error_Msg_FE;
722
723 ------------------------
724 -- Error_Msg_Internal --
725 ------------------------
726
727 procedure Error_Msg_Internal
728 (Msg : String;
729 Sptr : Source_Ptr;
730 Optr : Source_Ptr;
731 Msg_Cont : Boolean)
732 is
733 Next_Msg : Error_Msg_Id;
734 -- Pointer to next message at insertion point
735
736 Prev_Msg : Error_Msg_Id;
737 -- Pointer to previous message at insertion point
738
739 Temp_Msg : Error_Msg_Id;
740
741 Warn_Err : Boolean;
742 -- Set if warning to be treated as error
743
744 procedure Handle_Serious_Error;
745 -- Internal procedure to do all error message handling for a serious
746 -- error message, other than bumping the error counts and arranging
747 -- for the message to be output.
748
749 --------------------------
750 -- Handle_Serious_Error --
751 --------------------------
752
753 procedure Handle_Serious_Error is
754 begin
755 -- Turn off code generation if not done already
756
757 if Operating_Mode = Generate_Code then
758 Operating_Mode := Check_Semantics;
759 Expander_Active := False;
760 end if;
761
762 -- Set the fatal error flag in the unit table unless we are in
763 -- Try_Semantics mode (in which case we set ignored mode if not
764 -- currently set. This stops the semantics from being performed
765 -- if we find a serious error. This is skipped if we are currently
766 -- dealing with the configuration pragma file.
767
768 if Current_Source_Unit /= No_Unit then
769 declare
770 U : constant Unit_Number_Type := Get_Source_Unit (Sptr);
771 begin
772 if Try_Semantics then
773 if Fatal_Error (U) = None then
774 Set_Fatal_Error (U, Error_Ignored);
775 end if;
776 else
777 Set_Fatal_Error (U, Error_Detected);
778 end if;
779 end;
780 end if;
781 end Handle_Serious_Error;
782
783 -- Start of processing for Error_Msg_Internal
784
785 begin
786 if Raise_Exception_On_Error /= 0 then
787 raise Error_Msg_Exception;
788 end if;
789
790 Continuation := Msg_Cont;
791 Continuation_New_Line := False;
792 Suppress_Message := False;
793 Kill_Message := False;
794 Set_Msg_Text (Msg, Sptr);
795
796 -- Kill continuation if parent message killed
797
798 if Continuation and Last_Killed then
799 return;
800 end if;
801
802 -- Return without doing anything if message is suppressed
803
804 if Suppress_Message
805 and then not All_Errors_Mode
806 and then not Is_Warning_Msg
807 and then not Is_Unconditional_Msg
808 then
809 if not Continuation then
810 Last_Killed := True;
811 end if;
812
813 return;
814 end if;
815
816 -- Return without doing anything if message is killed and this is not
817 -- the first error message. The philosophy is that if we get a weird
818 -- error message and we already have had a message, then we hope the
819 -- weird message is a junk cascaded message
820
821 if Kill_Message
822 and then not All_Errors_Mode
823 and then Total_Errors_Detected /= 0
824 then
825 if not Continuation then
826 Last_Killed := True;
827 end if;
828
829 return;
830 end if;
831
832 -- Special check for warning message to see if it should be output
833
834 if Is_Warning_Msg then
835
836 -- Immediate return if warning message and warnings are suppressed
837
838 if Warnings_Suppressed (Optr) /= No_String
839 or else
840 Warnings_Suppressed (Sptr) /= No_String
841 then
842 Cur_Msg := No_Error_Msg;
843 return;
844 end if;
845
846 -- If the flag location is in the main extended source unit then for
847 -- sure we want the warning since it definitely belongs
848
849 if In_Extended_Main_Source_Unit (Sptr) then
850 null;
851
852 -- If the main unit has not been read yet. the warning must be on
853 -- a configuration file: gnat.adc or user-defined. This means we
854 -- are not parsing the main unit yet, so skip following checks.
855
856 elsif No (Cunit (Main_Unit)) then
857 null;
858
859 -- If the flag location is not in the main extended source unit, then
860 -- we want to eliminate the warning, unless it is in the extended
861 -- main code unit and we want warnings on the instance.
862
863 elsif In_Extended_Main_Code_Unit (Sptr) and then Warn_On_Instance then
864 null;
865
866 -- Keep warning if debug flag G set
867
868 elsif Debug_Flag_GG then
869 null;
870
871 -- Keep warning if message text contains !!
872
873 elsif Has_Double_Exclam then
874 null;
875
876 -- Here is where we delete a warning from a with'ed unit
877
878 else
879 Cur_Msg := No_Error_Msg;
880
881 if not Continuation then
882 Last_Killed := True;
883 end if;
884
885 return;
886 end if;
887 end if;
888
889 -- If message is to be ignored in special ignore message mode, this is
890 -- where we do this special processing, bypassing message output.
891
892 if Ignore_Errors_Enable > 0 then
893 if Is_Serious_Error then
894 Handle_Serious_Error;
895 end if;
896
897 return;
898 end if;
899
900 -- If error message line length set, and this is a continuation message
901 -- then all we do is to append the text to the text of the last message
902 -- with a comma space separator (eliminating a possible (style) or
903 -- info prefix).
904
905 if Error_Msg_Line_Length /= 0 and then Continuation then
906 Cur_Msg := Errors.Last;
907
908 declare
909 Oldm : String_Ptr := Errors.Table (Cur_Msg).Text;
910 Newm : String (1 .. Oldm'Last + 2 + Msglen);
911 Newl : Natural;
912 M : Natural;
913
914 begin
915 -- First copy old message to new one and free it
916
917 Newm (Oldm'Range) := Oldm.all;
918 Newl := Oldm'Length;
919 Free (Oldm);
920
921 -- Remove (style) or info: at start of message
922
923 if Msglen > 8 and then Msg_Buffer (1 .. 8) = "(style) " then
924 M := 9;
925
926 elsif Msglen > 6 and then Msg_Buffer (1 .. 6) = "info: " then
927 M := 7;
928
929 else
930 M := 1;
931 end if;
932
933 -- Now deal with separation between messages. Normally this is
934 -- simply comma space, but there are some special cases.
935
936 -- If continuation new line, then put actual NL character in msg
937
938 if Continuation_New_Line then
939 Newl := Newl + 1;
940 Newm (Newl) := ASCII.LF;
941
942 -- If continuation message is enclosed in parentheses, then
943 -- special treatment (don't need a comma, and we want to combine
944 -- successive parenthetical remarks into a single one with
945 -- separating commas).
946
947 elsif Msg_Buffer (M) = '(' and then Msg_Buffer (Msglen) = ')' then
948
949 -- Case where existing message ends in right paren, remove
950 -- and separate parenthetical remarks with a comma.
951
952 if Newm (Newl) = ')' then
953 Newm (Newl) := ',';
954 Msg_Buffer (M) := ' ';
955
956 -- Case where we are adding new parenthetical comment
957
958 else
959 Newl := Newl + 1;
960 Newm (Newl) := ' ';
961 end if;
962
963 -- Case where continuation not in parens and no new line
964
965 else
966 Newm (Newl + 1 .. Newl + 2) := ", ";
967 Newl := Newl + 2;
968 end if;
969
970 -- Append new message
971
972 Newm (Newl + 1 .. Newl + Msglen - M + 1) :=
973 Msg_Buffer (M .. Msglen);
974 Newl := Newl + Msglen - M + 1;
975 Errors.Table (Cur_Msg).Text := new String'(Newm (1 .. Newl));
976
977 -- Update warning msg flag and message doc char if needed
978
979 if Is_Warning_Msg then
980 if not Errors.Table (Cur_Msg).Warn then
981 Errors.Table (Cur_Msg).Warn := True;
982 Errors.Table (Cur_Msg).Warn_Chr := Warning_Msg_Char;
983
984 elsif Warning_Msg_Char /= ' ' then
985 Errors.Table (Cur_Msg).Warn_Chr := Warning_Msg_Char;
986 end if;
987 end if;
988 end;
989
990 return;
991 end if;
992
993 -- Here we build a new error object
994
995 Errors.Append
996 ((Text => new String'(Msg_Buffer (1 .. Msglen)),
997 Next => No_Error_Msg,
998 Prev => No_Error_Msg,
999 Sptr => Sptr,
1000 Optr => Optr,
1001 Sfile => Get_Source_File_Index (Sptr),
1002 Line => Get_Physical_Line_Number (Sptr),
1003 Col => Get_Column_Number (Sptr),
1004 Warn => Is_Warning_Msg,
1005 Info => Is_Info_Msg,
1006 Check => Is_Check_Msg,
1007 Warn_Err => False, -- reset below
1008 Warn_Chr => Warning_Msg_Char,
1009 Style => Is_Style_Msg,
1010 Serious => Is_Serious_Error,
1011 Uncond => Is_Unconditional_Msg,
1012 Msg_Cont => Continuation,
1013 Deleted => False));
1014 Cur_Msg := Errors.Last;
1015
1016 -- Test if warning to be treated as error
1017
1018 Warn_Err :=
1019 Is_Warning_Msg
1020 and then (Warning_Treated_As_Error (Msg_Buffer (1 .. Msglen))
1021 or else
1022 Warning_Treated_As_Error (Get_Warning_Tag (Cur_Msg)));
1023
1024 -- Propagate Warn_Err to this message and preceding continuations
1025
1026 for J in reverse 1 .. Errors.Last loop
1027 Errors.Table (J).Warn_Err := Warn_Err;
1028 exit when not Errors.Table (J).Msg_Cont;
1029 end loop;
1030
1031 -- If immediate errors mode set, output error message now. Also output
1032 -- now if the -d1 debug flag is set (so node number message comes out
1033 -- just before actual error message)
1034
1035 if Debug_Flag_OO or else Debug_Flag_1 then
1036 Write_Eol;
1037 Output_Source_Line
1038 (Errors.Table (Cur_Msg).Line, Errors.Table (Cur_Msg).Sfile, True);
1039 Temp_Msg := Cur_Msg;
1040 Output_Error_Msgs (Temp_Msg);
1041
1042 -- If not in immediate errors mode, then we insert the message in the
1043 -- error chain for later output by Finalize. The messages are sorted
1044 -- first by unit (main unit comes first), and within a unit by source
1045 -- location (earlier flag location first in the chain).
1046
1047 else
1048 -- First a quick check, does this belong at the very end of the chain
1049 -- of error messages. This saves a lot of time in the normal case if
1050 -- there are lots of messages.
1051
1052 if Last_Error_Msg /= No_Error_Msg
1053 and then Errors.Table (Cur_Msg).Sfile =
1054 Errors.Table (Last_Error_Msg).Sfile
1055 and then (Sptr > Errors.Table (Last_Error_Msg).Sptr
1056 or else
1057 (Sptr = Errors.Table (Last_Error_Msg).Sptr
1058 and then
1059 Optr > Errors.Table (Last_Error_Msg).Optr))
1060 then
1061 Prev_Msg := Last_Error_Msg;
1062 Next_Msg := No_Error_Msg;
1063
1064 -- Otherwise do a full sequential search for the insertion point
1065
1066 else
1067 Prev_Msg := No_Error_Msg;
1068 Next_Msg := First_Error_Msg;
1069 while Next_Msg /= No_Error_Msg loop
1070 exit when
1071 Errors.Table (Cur_Msg).Sfile < Errors.Table (Next_Msg).Sfile;
1072
1073 if Errors.Table (Cur_Msg).Sfile = Errors.Table (Next_Msg).Sfile
1074 then
1075 exit when Sptr < Errors.Table (Next_Msg).Sptr
1076 or else (Sptr = Errors.Table (Next_Msg).Sptr
1077 and then Optr < Errors.Table (Next_Msg).Optr);
1078 end if;
1079
1080 Prev_Msg := Next_Msg;
1081 Next_Msg := Errors.Table (Next_Msg).Next;
1082 end loop;
1083 end if;
1084
1085 -- Now we insert the new message in the error chain.
1086
1087 -- The possible insertion point for the new message is after Prev_Msg
1088 -- and before Next_Msg. However, this is where we do a special check
1089 -- for redundant parsing messages, defined as messages posted on the
1090 -- same line. The idea here is that probably such messages are junk
1091 -- from the parser recovering. In full errors mode, we don't do this
1092 -- deletion, but otherwise such messages are discarded at this stage.
1093
1094 if Prev_Msg /= No_Error_Msg
1095 and then Errors.Table (Prev_Msg).Line =
1096 Errors.Table (Cur_Msg).Line
1097 and then Errors.Table (Prev_Msg).Sfile =
1098 Errors.Table (Cur_Msg).Sfile
1099 and then Compiler_State = Parsing
1100 and then not All_Errors_Mode
1101 then
1102 -- Don't delete unconditional messages and at this stage, don't
1103 -- delete continuation lines; we attempted to delete those earlier
1104 -- if the parent message was deleted.
1105
1106 if not Errors.Table (Cur_Msg).Uncond
1107 and then not Continuation
1108 then
1109 -- Don't delete if prev msg is warning and new msg is an error.
1110 -- This is because we don't want a real error masked by a
1111 -- warning. In all other cases (that is parse errors for the
1112 -- same line that are not unconditional) we do delete the
1113 -- message. This helps to avoid junk extra messages from
1114 -- cascaded parsing errors
1115
1116 if not (Errors.Table (Prev_Msg).Warn
1117 or else
1118 Errors.Table (Prev_Msg).Style)
1119 or else
1120 (Errors.Table (Cur_Msg).Warn
1121 or else
1122 Errors.Table (Cur_Msg).Style)
1123 then
1124 -- All tests passed, delete the message by simply returning
1125 -- without any further processing.
1126
1127 pragma Assert (not Continuation);
1128
1129 Last_Killed := True;
1130 return;
1131 end if;
1132 end if;
1133 end if;
1134
1135 -- Come here if message is to be inserted in the error chain
1136
1137 if not Continuation then
1138 Last_Killed := False;
1139 end if;
1140
1141 if Prev_Msg = No_Error_Msg then
1142 First_Error_Msg := Cur_Msg;
1143 else
1144 Errors.Table (Prev_Msg).Next := Cur_Msg;
1145 end if;
1146
1147 Errors.Table (Cur_Msg).Next := Next_Msg;
1148
1149 if Next_Msg = No_Error_Msg then
1150 Last_Error_Msg := Cur_Msg;
1151 end if;
1152 end if;
1153
1154 -- Bump appropriate statistics counts
1155
1156 if Errors.Table (Cur_Msg).Info then
1157 Info_Messages := Info_Messages + 1;
1158
1159 -- Could be (usually is) both "info" and "warning"
1160
1161 if Errors.Table (Cur_Msg).Warn then
1162 Warnings_Detected := Warnings_Detected + 1;
1163 end if;
1164
1165 elsif Errors.Table (Cur_Msg).Warn
1166 or else Errors.Table (Cur_Msg).Style
1167 then
1168 Warnings_Detected := Warnings_Detected + 1;
1169
1170 elsif Errors.Table (Cur_Msg).Check then
1171 Check_Messages := Check_Messages + 1;
1172
1173 else
1174 Total_Errors_Detected := Total_Errors_Detected + 1;
1175
1176 if Errors.Table (Cur_Msg).Serious then
1177 Serious_Errors_Detected := Serious_Errors_Detected + 1;
1178 Handle_Serious_Error;
1179
1180 -- If not serious error, set Fatal_Error to indicate ignored error
1181
1182 else
1183 declare
1184 U : constant Unit_Number_Type := Get_Source_Unit (Sptr);
1185 begin
1186 if Fatal_Error (U) = None then
1187 Set_Fatal_Error (U, Error_Ignored);
1188 end if;
1189 end;
1190 end if;
1191 end if;
1192
1193 -- Record warning message issued
1194
1195 if Errors.Table (Cur_Msg).Warn
1196 and then not Errors.Table (Cur_Msg).Msg_Cont
1197 then
1198 Warning_Msg := Cur_Msg;
1199 end if;
1200
1201 -- If too many warnings turn off warnings
1202
1203 if Maximum_Messages /= 0 then
1204 if Warnings_Detected = Maximum_Messages then
1205 Warning_Mode := Suppress;
1206 end if;
1207
1208 -- If too many errors abandon compilation
1209
1210 if Total_Errors_Detected = Maximum_Messages then
1211 raise Unrecoverable_Error;
1212 end if;
1213 end if;
1214 end Error_Msg_Internal;
1215
1216 -----------------
1217 -- Error_Msg_N --
1218 -----------------
1219
1220 procedure Error_Msg_N (Msg : String; N : Node_Or_Entity_Id) is
1221 begin
1222 Error_Msg_NEL (Msg, N, N, Sloc (N));
1223 end Error_Msg_N;
1224
1225 ------------------
1226 -- Error_Msg_NE --
1227 ------------------
1228
1229 procedure Error_Msg_NE
1230 (Msg : String;
1231 N : Node_Or_Entity_Id;
1232 E : Node_Or_Entity_Id)
1233 is
1234 begin
1235 Error_Msg_NEL (Msg, N, E, Sloc (N));
1236 end Error_Msg_NE;
1237
1238 -------------------
1239 -- Error_Msg_NEL --
1240 -------------------
1241
1242 procedure Error_Msg_NEL
1243 (Msg : String;
1244 N : Node_Or_Entity_Id;
1245 E : Node_Or_Entity_Id;
1246 Flag_Location : Source_Ptr)
1247 is
1248 begin
1249 if Special_Msg_Delete (Msg, N, E) then
1250 return;
1251 end if;
1252
1253 Prescan_Message (Msg);
1254
1255 -- Special handling for warning messages
1256
1257 if Is_Warning_Msg then
1258
1259 -- Suppress if no warnings set for either entity or node
1260
1261 if No_Warnings (N) or else No_Warnings (E) then
1262
1263 -- Disable any continuation messages as well
1264
1265 Last_Killed := True;
1266 return;
1267 end if;
1268
1269 -- Suppress if inside loop that is known to be null or is probably
1270 -- null (case where loop executes only if invalid values present).
1271 -- In either case warnings in the loop are likely to be junk.
1272
1273 declare
1274 P : Node_Id;
1275
1276 begin
1277 P := Parent (N);
1278 while Present (P) loop
1279 if Nkind (P) = N_Loop_Statement
1280 and then Suppress_Loop_Warnings (P)
1281 then
1282 return;
1283 end if;
1284
1285 P := Parent (P);
1286 end loop;
1287 end;
1288 end if;
1289
1290 -- Test for message to be output
1291
1292 if All_Errors_Mode
1293 or else Is_Unconditional_Msg
1294 or else Is_Warning_Msg
1295 or else OK_Node (N)
1296 or else (Msg (Msg'First) = '\' and then not Last_Killed)
1297 then
1298 Debug_Output (N);
1299 Error_Msg_Node_1 := E;
1300 Error_Msg (Msg, Flag_Location);
1301
1302 else
1303 Last_Killed := True;
1304 end if;
1305
1306 Set_Posted (N);
1307 end Error_Msg_NEL;
1308
1309 ------------------
1310 -- Error_Msg_NW --
1311 ------------------
1312
1313 procedure Error_Msg_NW
1314 (Eflag : Boolean;
1315 Msg : String;
1316 N : Node_Or_Entity_Id)
1317 is
1318 begin
1319 if Eflag
1320 and then In_Extended_Main_Source_Unit (N)
1321 and then Comes_From_Source (N)
1322 then
1323 Error_Msg_NEL (Msg, N, N, Sloc (N));
1324 end if;
1325 end Error_Msg_NW;
1326
1327 -----------------
1328 -- Error_Msg_S --
1329 -----------------
1330
1331 procedure Error_Msg_S (Msg : String) is
1332 begin
1333 Error_Msg (Msg, Scan_Ptr);
1334 end Error_Msg_S;
1335
1336 ------------------
1337 -- Error_Msg_SC --
1338 ------------------
1339
1340 procedure Error_Msg_SC (Msg : String) is
1341 begin
1342 -- If we are at end of file, post the flag after the previous token
1343
1344 if Token = Tok_EOF then
1345 Error_Msg_AP (Msg);
1346
1347 -- For all other cases the message is posted at the current token
1348 -- pointer position
1349
1350 else
1351 Error_Msg (Msg, Token_Ptr);
1352 end if;
1353 end Error_Msg_SC;
1354
1355 ------------------
1356 -- Error_Msg_SP --
1357 ------------------
1358
1359 procedure Error_Msg_SP (Msg : String) is
1360 begin
1361 -- Note: in the case where there is no previous token, Prev_Token_Ptr
1362 -- is set to Source_First, which is a reasonable position for the
1363 -- error flag in this situation
1364
1365 Error_Msg (Msg, Prev_Token_Ptr);
1366 end Error_Msg_SP;
1367
1368 --------------
1369 -- Finalize --
1370 --------------
1371
1372 procedure Finalize (Last_Call : Boolean) is
1373 Cur : Error_Msg_Id;
1374 Nxt : Error_Msg_Id;
1375 F : Error_Msg_Id;
1376
1377 procedure Delete_Warning (E : Error_Msg_Id);
1378 -- Delete a warning msg if not already deleted and adjust warning count
1379
1380 --------------------
1381 -- Delete_Warning --
1382 --------------------
1383
1384 procedure Delete_Warning (E : Error_Msg_Id) is
1385 begin
1386 if not Errors.Table (E).Deleted then
1387 Errors.Table (E).Deleted := True;
1388 Warnings_Detected := Warnings_Detected - 1;
1389
1390 if Errors.Table (E).Info then
1391 Info_Messages := Info_Messages - 1;
1392 end if;
1393
1394 if Errors.Table (E).Warn_Err then
1395 Warnings_Treated_As_Errors := Warnings_Treated_As_Errors - 1;
1396 end if;
1397 end if;
1398 end Delete_Warning;
1399
1400 -- Start of processing for Finalize
1401
1402 begin
1403 -- Set Prev pointers
1404
1405 Cur := First_Error_Msg;
1406 while Cur /= No_Error_Msg loop
1407 Nxt := Errors.Table (Cur).Next;
1408 exit when Nxt = No_Error_Msg;
1409 Errors.Table (Nxt).Prev := Cur;
1410 Cur := Nxt;
1411 end loop;
1412
1413 -- Eliminate any duplicated error messages from the list. This is
1414 -- done after the fact to avoid problems with Change_Error_Text.
1415
1416 Cur := First_Error_Msg;
1417 while Cur /= No_Error_Msg loop
1418 Nxt := Errors.Table (Cur).Next;
1419
1420 F := Nxt;
1421 while F /= No_Error_Msg
1422 and then Errors.Table (F).Sptr = Errors.Table (Cur).Sptr
1423 loop
1424 Check_Duplicate_Message (Cur, F);
1425 F := Errors.Table (F).Next;
1426 end loop;
1427
1428 Cur := Nxt;
1429 end loop;
1430
1431 -- Mark any messages suppressed by specific warnings as Deleted
1432
1433 Cur := First_Error_Msg;
1434 while Cur /= No_Error_Msg loop
1435 declare
1436 CE : Error_Msg_Object renames Errors.Table (Cur);
1437 Tag : constant String := Get_Warning_Tag (Cur);
1438
1439 begin
1440 if (CE.Warn and not CE.Deleted)
1441 and then
1442 (Warning_Specifically_Suppressed (CE.Sptr, CE.Text, Tag) /=
1443 No_String
1444 or else
1445 Warning_Specifically_Suppressed (CE.Optr, CE.Text, Tag) /=
1446 No_String)
1447 then
1448 Delete_Warning (Cur);
1449
1450 -- If this is a continuation, delete previous parts of message
1451
1452 F := Cur;
1453 while Errors.Table (F).Msg_Cont loop
1454 F := Errors.Table (F).Prev;
1455 exit when F = No_Error_Msg;
1456 Delete_Warning (F);
1457 end loop;
1458
1459 -- Delete any following continuations
1460
1461 F := Cur;
1462 loop
1463 F := Errors.Table (F).Next;
1464 exit when F = No_Error_Msg;
1465 exit when not Errors.Table (F).Msg_Cont;
1466 Delete_Warning (F);
1467 end loop;
1468 end if;
1469 end;
1470
1471 Cur := Errors.Table (Cur).Next;
1472 end loop;
1473
1474 Finalize_Called := True;
1475
1476 -- Check consistency of specific warnings (may add warnings). We only
1477 -- do this on the last call, after all possible warnings are posted.
1478
1479 if Last_Call then
1480 Validate_Specific_Warnings (Error_Msg'Access);
1481 end if;
1482 end Finalize;
1483
1484 ----------------
1485 -- First_Node --
1486 ----------------
1487
1488 function First_Node (C : Node_Id) return Node_Id is
1489 Orig : constant Node_Id := Original_Node (C);
1490 Loc : constant Source_Ptr := Sloc (Orig);
1491 Sfile : constant Source_File_Index := Get_Source_File_Index (Loc);
1492 Earliest : Node_Id;
1493 Eloc : Source_Ptr;
1494
1495 function Test_Earlier (N : Node_Id) return Traverse_Result;
1496 -- Function applied to every node in the construct
1497
1498 procedure Search_Tree_First is new Traverse_Proc (Test_Earlier);
1499 -- Create traversal procedure
1500
1501 ------------------
1502 -- Test_Earlier --
1503 ------------------
1504
1505 function Test_Earlier (N : Node_Id) return Traverse_Result is
1506 Norig : constant Node_Id := Original_Node (N);
1507 Loc : constant Source_Ptr := Sloc (Norig);
1508
1509 begin
1510 -- Check for earlier
1511
1512 if Loc < Eloc
1513
1514 -- Ignore nodes with no useful location information
1515
1516 and then Loc /= Standard_Location
1517 and then Loc /= No_Location
1518
1519 -- Ignore nodes from a different file. This ensures against cases
1520 -- of strange foreign code somehow being present. We don't want
1521 -- wild placement of messages if that happens.
1522
1523 and then Get_Source_File_Index (Loc) = Sfile
1524 then
1525 Earliest := Norig;
1526 Eloc := Loc;
1527 end if;
1528
1529 return OK_Orig;
1530 end Test_Earlier;
1531
1532 -- Start of processing for First_Node
1533
1534 begin
1535 if Nkind (Orig) in N_Subexpr then
1536 Earliest := Orig;
1537 Eloc := Loc;
1538 Search_Tree_First (Orig);
1539 return Earliest;
1540
1541 else
1542 return Orig;
1543 end if;
1544 end First_Node;
1545
1546 ----------------
1547 -- First_Sloc --
1548 ----------------
1549
1550 function First_Sloc (N : Node_Id) return Source_Ptr is
1551 SI : constant Source_File_Index := Source_Index (Get_Source_Unit (N));
1552 SF : constant Source_Ptr := Source_First (SI);
1553 F : Node_Id;
1554 S : Source_Ptr;
1555
1556 begin
1557 F := First_Node (N);
1558 S := Sloc (F);
1559
1560 -- The following circuit is a bit subtle. When we have parenthesized
1561 -- expressions, then the Sloc will not record the location of the paren,
1562 -- but we would like to post the flag on the paren. So what we do is to
1563 -- crawl up the tree from the First_Node, adjusting the Sloc value for
1564 -- any parentheses we know are present. Yes, we know this circuit is not
1565 -- 100% reliable (e.g. because we don't record all possible paren level
1566 -- values), but this is only for an error message so it is good enough.
1567
1568 Node_Loop : loop
1569 Paren_Loop : for J in 1 .. Paren_Count (F) loop
1570
1571 -- We don't look more than 12 characters behind the current
1572 -- location, and in any case not past the front of the source.
1573
1574 Search_Loop : for K in 1 .. 12 loop
1575 exit Search_Loop when S = SF;
1576
1577 if Source_Text (SI) (S - 1) = '(' then
1578 S := S - 1;
1579 exit Search_Loop;
1580
1581 elsif Source_Text (SI) (S - 1) <= ' ' then
1582 S := S - 1;
1583
1584 else
1585 exit Search_Loop;
1586 end if;
1587 end loop Search_Loop;
1588 end loop Paren_Loop;
1589
1590 exit Node_Loop when F = N;
1591 F := Parent (F);
1592 exit Node_Loop when Nkind (F) not in N_Subexpr;
1593 end loop Node_Loop;
1594
1595 return S;
1596 end First_Sloc;
1597
1598 -----------------------
1599 -- Get_Ignore_Errors --
1600 -----------------------
1601
1602 function Get_Ignore_Errors return Boolean is
1603 begin
1604 return Errors_Must_Be_Ignored;
1605 end Get_Ignore_Errors;
1606
1607 ----------------
1608 -- Initialize --
1609 ----------------
1610
1611 procedure Initialize is
1612 begin
1613 Errors.Init;
1614 First_Error_Msg := No_Error_Msg;
1615 Last_Error_Msg := No_Error_Msg;
1616 Serious_Errors_Detected := 0;
1617 Total_Errors_Detected := 0;
1618 Warnings_Treated_As_Errors := 0;
1619 Warnings_Detected := 0;
1620 Info_Messages := 0;
1621 Warnings_As_Errors_Count := 0;
1622 Cur_Msg := No_Error_Msg;
1623 List_Pragmas.Init;
1624
1625 -- Initialize warnings tables
1626
1627 Warnings.Init;
1628 Specific_Warnings.Init;
1629 end Initialize;
1630
1631 -----------------
1632 -- No_Warnings --
1633 -----------------
1634
1635 function No_Warnings (N : Node_Or_Entity_Id) return Boolean is
1636 begin
1637 if Error_Posted (N) then
1638 return True;
1639
1640 elsif Nkind (N) in N_Entity and then Has_Warnings_Off (N) then
1641 return True;
1642
1643 elsif Is_Entity_Name (N)
1644 and then Present (Entity (N))
1645 and then Has_Warnings_Off (Entity (N))
1646 then
1647 return True;
1648
1649 else
1650 return False;
1651 end if;
1652 end No_Warnings;
1653
1654 -------------
1655 -- OK_Node --
1656 -------------
1657
1658 function OK_Node (N : Node_Id) return Boolean is
1659 K : constant Node_Kind := Nkind (N);
1660
1661 begin
1662 if Error_Posted (N) then
1663 return False;
1664
1665 elsif K in N_Has_Etype
1666 and then Present (Etype (N))
1667 and then Error_Posted (Etype (N))
1668 then
1669 return False;
1670
1671 elsif (K in N_Op
1672 or else K = N_Attribute_Reference
1673 or else K = N_Character_Literal
1674 or else K = N_Expanded_Name
1675 or else K = N_Identifier
1676 or else K = N_Operator_Symbol)
1677 and then Present (Entity (N))
1678 and then Error_Posted (Entity (N))
1679 then
1680 return False;
1681 else
1682 return True;
1683 end if;
1684 end OK_Node;
1685
1686 ---------------------
1687 -- Output_Messages --
1688 ---------------------
1689
1690 procedure Output_Messages is
1691 E : Error_Msg_Id;
1692 Err_Flag : Boolean;
1693
1694 procedure Write_Error_Summary;
1695 -- Write error summary
1696
1697 procedure Write_Header (Sfile : Source_File_Index);
1698 -- Write header line (compiling or checking given file)
1699
1700 procedure Write_Max_Errors;
1701 -- Write message if max errors reached
1702
1703 -------------------------
1704 -- Write_Error_Summary --
1705 -------------------------
1706
1707 procedure Write_Error_Summary is
1708 begin
1709 -- Extra blank line if error messages or source listing were output
1710
1711 if Total_Errors_Detected + Warnings_Detected > 0 or else Full_List
1712 then
1713 Write_Eol;
1714 end if;
1715
1716 -- Message giving number of lines read and number of errors detected.
1717 -- This normally goes to Standard_Output. The exception is when brief
1718 -- mode is not set, verbose mode (or full list mode) is set, and
1719 -- there are errors. In this case we send the message to standard
1720 -- error to make sure that *something* appears on standard error
1721 -- in an error situation.
1722
1723 if Total_Errors_Detected + Warnings_Detected /= 0
1724 and then not Brief_Output
1725 and then (Verbose_Mode or Full_List)
1726 then
1727 Set_Standard_Error;
1728 end if;
1729
1730 -- Message giving total number of lines. Don't give this message if
1731 -- the Main_Source line is unknown (this happens in error situations,
1732 -- e.g. when integrated preprocessing fails).
1733
1734 if Main_Source_File /= No_Source_File then
1735 Write_Str (" ");
1736 Write_Int (Num_Source_Lines (Main_Source_File));
1737
1738 if Num_Source_Lines (Main_Source_File) = 1 then
1739 Write_Str (" line: ");
1740 else
1741 Write_Str (" lines: ");
1742 end if;
1743 end if;
1744
1745 if Total_Errors_Detected = 0 then
1746 Write_Str ("No errors");
1747
1748 elsif Total_Errors_Detected = 1 then
1749 Write_Str ("1 error");
1750
1751 else
1752 Write_Int (Total_Errors_Detected);
1753 Write_Str (" errors");
1754 end if;
1755
1756 if Warnings_Detected - Info_Messages /= 0 then
1757 Write_Str (", ");
1758 Write_Int (Warnings_Detected);
1759 Write_Str (" warning");
1760
1761 if Warnings_Detected - Info_Messages /= 1 then
1762 Write_Char ('s');
1763 end if;
1764
1765 if Warning_Mode = Treat_As_Error then
1766 Write_Str (" (treated as error");
1767
1768 if Warnings_Detected /= 1 then
1769 Write_Char ('s');
1770 end if;
1771
1772 Write_Char (')');
1773
1774 elsif Warnings_Treated_As_Errors /= 0 then
1775 Write_Str (" (");
1776 Write_Int (Warnings_Treated_As_Errors);
1777 Write_Str (" treated as errors)");
1778 end if;
1779 end if;
1780
1781 if Info_Messages /= 0 then
1782 Write_Str (", ");
1783 Write_Int (Info_Messages);
1784 Write_Str (" info message");
1785
1786 if Info_Messages > 1 then
1787 Write_Char ('s');
1788 end if;
1789 end if;
1790
1791 Write_Eol;
1792 Set_Standard_Output;
1793 end Write_Error_Summary;
1794
1795 ------------------
1796 -- Write_Header --
1797 ------------------
1798
1799 procedure Write_Header (Sfile : Source_File_Index) is
1800 begin
1801 if Verbose_Mode or Full_List then
1802 if Original_Operating_Mode = Generate_Code then
1803 Write_Str ("Compiling: ");
1804 else
1805 Write_Str ("Checking: ");
1806 end if;
1807
1808 Write_Name (Full_File_Name (Sfile));
1809
1810 if not Debug_Flag_7 then
1811 Write_Eol;
1812 Write_Str ("Source file time stamp: ");
1813 Write_Time_Stamp (Sfile);
1814 Write_Eol;
1815 Write_Str ("Compiled at: " & Compilation_Time);
1816 end if;
1817
1818 Write_Eol;
1819 end if;
1820 end Write_Header;
1821
1822 ----------------------
1823 -- Write_Max_Errors --
1824 ----------------------
1825
1826 procedure Write_Max_Errors is
1827 begin
1828 if Maximum_Messages /= 0 then
1829 if Warnings_Detected >= Maximum_Messages then
1830 Set_Standard_Error;
1831 Write_Line ("maximum number of warnings output");
1832 Write_Line ("any further warnings suppressed");
1833 Set_Standard_Output;
1834 end if;
1835
1836 -- If too many errors print message
1837
1838 if Total_Errors_Detected >= Maximum_Messages then
1839 Set_Standard_Error;
1840 Write_Line ("fatal error: maximum number of errors detected");
1841 Set_Standard_Output;
1842 end if;
1843 end if;
1844 end Write_Max_Errors;
1845
1846 -- Start of processing for Output_Messages
1847
1848 begin
1849 -- Error if Finalize has not been called
1850
1851 if not Finalize_Called then
1852 raise Program_Error;
1853 end if;
1854
1855 -- Reset current error source file if the main unit has a pragma
1856 -- Source_Reference. This ensures outputting the proper name of
1857 -- the source file in this situation.
1858
1859 if Main_Source_File = No_Source_File
1860 or else Num_SRef_Pragmas (Main_Source_File) /= 0
1861 then
1862 Current_Error_Source_File := No_Source_File;
1863 end if;
1864
1865 -- Brief Error mode
1866
1867 if Brief_Output or (not Full_List and not Verbose_Mode) then
1868 Set_Standard_Error;
1869
1870 E := First_Error_Msg;
1871 while E /= No_Error_Msg loop
1872 if not Errors.Table (E).Deleted and then not Debug_Flag_KK then
1873 if Full_Path_Name_For_Brief_Errors then
1874 Write_Name (Full_Ref_Name (Errors.Table (E).Sfile));
1875 else
1876 Write_Name (Reference_Name (Errors.Table (E).Sfile));
1877 end if;
1878
1879 Write_Char (':');
1880 Write_Int (Int (Physical_To_Logical
1881 (Errors.Table (E).Line,
1882 Errors.Table (E).Sfile)));
1883 Write_Char (':');
1884
1885 if Errors.Table (E).Col < 10 then
1886 Write_Char ('0');
1887 end if;
1888
1889 Write_Int (Int (Errors.Table (E).Col));
1890 Write_Str (": ");
1891 Output_Msg_Text (E);
1892 Write_Eol;
1893 end if;
1894
1895 E := Errors.Table (E).Next;
1896 end loop;
1897
1898 Set_Standard_Output;
1899 end if;
1900
1901 -- Full source listing case
1902
1903 if Full_List then
1904 List_Pragmas_Index := 1;
1905 List_Pragmas_Mode := True;
1906 E := First_Error_Msg;
1907
1908 -- Normal case, to stdout (copyright notice already output)
1909
1910 if Full_List_File_Name = null then
1911 if not Debug_Flag_7 then
1912 Write_Eol;
1913 end if;
1914
1915 -- Output to file
1916
1917 else
1918 Create_List_File_Access.all (Full_List_File_Name.all);
1919 Set_Special_Output (Write_List_Info_Access.all'Access);
1920
1921 -- Write copyright notice to file
1922
1923 if not Debug_Flag_7 then
1924 Write_Str ("GNAT ");
1925 Write_Str (Gnat_Version_String);
1926 Write_Eol;
1927 Write_Str ("Copyright 1992-" &
1928 Current_Year &
1929 ", Free Software Foundation, Inc.");
1930 Write_Eol;
1931 end if;
1932 end if;
1933
1934 -- First list extended main source file units with errors
1935
1936 for U in Main_Unit .. Last_Unit loop
1937 if In_Extended_Main_Source_Unit (Cunit_Entity (U))
1938
1939 -- If debug flag d.m is set, only the main source is listed
1940
1941 and then (U = Main_Unit or else not Debug_Flag_Dot_M)
1942
1943 -- If the unit of the entity does not come from source, it is
1944 -- an implicit subprogram declaration for a child subprogram.
1945 -- Do not emit errors for it, they are listed with the body.
1946
1947 and then
1948 (No (Cunit_Entity (U))
1949 or else Comes_From_Source (Cunit_Entity (U))
1950 or else not Is_Subprogram (Cunit_Entity (U)))
1951
1952 -- If the compilation unit associated with this unit does not
1953 -- come from source, it means it is an instantiation that should
1954 -- not be included in the source listing.
1955
1956 and then Comes_From_Source (Cunit (U))
1957 then
1958 declare
1959 Sfile : constant Source_File_Index := Source_Index (U);
1960
1961 begin
1962 Write_Eol;
1963
1964 -- Only write the header if Sfile is known
1965
1966 if Sfile /= No_Source_File then
1967 Write_Header (Sfile);
1968 Write_Eol;
1969 end if;
1970
1971 -- Normally, we don't want an "error messages from file"
1972 -- message when listing the entire file, so we set the
1973 -- current source file as the current error source file.
1974 -- However, the old style of doing things was to list this
1975 -- message if pragma Source_Reference is present, even for
1976 -- the main unit. Since the purpose of the -gnatd.m switch
1977 -- is to duplicate the old behavior, we skip the reset if
1978 -- this debug flag is set.
1979
1980 if not Debug_Flag_Dot_M then
1981 Current_Error_Source_File := Sfile;
1982 end if;
1983
1984 -- Only output the listing if Sfile is known, to avoid
1985 -- crashing the compiler.
1986
1987 if Sfile /= No_Source_File then
1988 for N in 1 .. Last_Source_Line (Sfile) loop
1989 while E /= No_Error_Msg
1990 and then Errors.Table (E).Deleted
1991 loop
1992 E := Errors.Table (E).Next;
1993 end loop;
1994
1995 Err_Flag :=
1996 E /= No_Error_Msg
1997 and then Errors.Table (E).Line = N
1998 and then Errors.Table (E).Sfile = Sfile;
1999
2000 Output_Source_Line (N, Sfile, Err_Flag);
2001
2002 if Err_Flag then
2003 Output_Error_Msgs (E);
2004
2005 if not Debug_Flag_2 then
2006 Write_Eol;
2007 end if;
2008 end if;
2009 end loop;
2010 end if;
2011 end;
2012 end if;
2013 end loop;
2014
2015 -- Then output errors, if any, for subsidiary units not in the
2016 -- main extended unit.
2017
2018 -- Note: if debug flag d.m set, include errors for any units other
2019 -- than the main unit in the extended source unit (e.g. spec and
2020 -- subunits for a body).
2021
2022 while E /= No_Error_Msg
2023 and then (not In_Extended_Main_Source_Unit (Errors.Table (E).Sptr)
2024 or else
2025 (Debug_Flag_Dot_M
2026 and then Get_Source_Unit
2027 (Errors.Table (E).Sptr) /= Main_Unit))
2028 loop
2029 if Errors.Table (E).Deleted then
2030 E := Errors.Table (E).Next;
2031
2032 else
2033 Write_Eol;
2034 Output_Source_Line
2035 (Errors.Table (E).Line, Errors.Table (E).Sfile, True);
2036 Output_Error_Msgs (E);
2037 end if;
2038 end loop;
2039
2040 -- If output to file, write extra copy of error summary to the
2041 -- output file, and then close it.
2042
2043 if Full_List_File_Name /= null then
2044 Write_Error_Summary;
2045 Write_Max_Errors;
2046 Close_List_File_Access.all;
2047 Cancel_Special_Output;
2048 end if;
2049 end if;
2050
2051 -- Verbose mode (error lines only with error flags). Normally this is
2052 -- ignored in full list mode, unless we are listing to a file, in which
2053 -- case we still generate -gnatv output to standard output.
2054
2055 if Verbose_Mode
2056 and then (not Full_List or else Full_List_File_Name /= null)
2057 then
2058 Write_Eol;
2059
2060 -- Output the header only when Main_Source_File is known
2061
2062 if Main_Source_File /= No_Source_File then
2063 Write_Header (Main_Source_File);
2064 end if;
2065
2066 E := First_Error_Msg;
2067
2068 -- Loop through error lines
2069
2070 while E /= No_Error_Msg loop
2071 if Errors.Table (E).Deleted then
2072 E := Errors.Table (E).Next;
2073 else
2074 Write_Eol;
2075 Output_Source_Line
2076 (Errors.Table (E).Line, Errors.Table (E).Sfile, True);
2077 Output_Error_Msgs (E);
2078 end if;
2079 end loop;
2080 end if;
2081
2082 -- Output error summary if verbose or full list mode
2083
2084 if Verbose_Mode or else Full_List then
2085 Write_Error_Summary;
2086 end if;
2087
2088 Write_Max_Errors;
2089
2090 if Warning_Mode = Treat_As_Error then
2091 Total_Errors_Detected :=
2092 Total_Errors_Detected + Warnings_Detected - Info_Messages;
2093 Warnings_Detected := Info_Messages;
2094 end if;
2095 end Output_Messages;
2096
2097 ------------------------
2098 -- Output_Source_Line --
2099 ------------------------
2100
2101 procedure Output_Source_Line
2102 (L : Physical_Line_Number;
2103 Sfile : Source_File_Index;
2104 Errs : Boolean)
2105 is
2106 S : Source_Ptr;
2107 C : Character;
2108
2109 Line_Number_Output : Boolean := False;
2110 -- Set True once line number is output
2111
2112 Empty_Line : Boolean := True;
2113 -- Set False if line includes at least one character
2114
2115 begin
2116 if Sfile /= Current_Error_Source_File then
2117 Write_Str ("==============Error messages for ");
2118
2119 case Sinput.File_Type (Sfile) is
2120 when Sinput.Src =>
2121 Write_Str ("source");
2122
2123 when Sinput.Config =>
2124 Write_Str ("configuration pragmas");
2125
2126 when Sinput.Def =>
2127 Write_Str ("symbol definition");
2128
2129 when Sinput.Preproc =>
2130 Write_Str ("preprocessing data");
2131 end case;
2132
2133 Write_Str (" file: ");
2134 Write_Name (Full_File_Name (Sfile));
2135 Write_Eol;
2136
2137 if Num_SRef_Pragmas (Sfile) > 0 then
2138 Write_Str ("--------------Line numbers from file: ");
2139 Write_Name (Full_Ref_Name (Sfile));
2140 Write_Str (" (starting at line ");
2141 Write_Int (Int (First_Mapped_Line (Sfile)));
2142 Write_Char (')');
2143 Write_Eol;
2144 end if;
2145
2146 Current_Error_Source_File := Sfile;
2147 end if;
2148
2149 if Errs or List_Pragmas_Mode then
2150 Output_Line_Number (Physical_To_Logical (L, Sfile));
2151 Line_Number_Output := True;
2152 end if;
2153
2154 S := Line_Start (L, Sfile);
2155
2156 loop
2157 C := Source_Text (Sfile) (S);
2158 exit when C = ASCII.LF or else C = ASCII.CR or else C = EOF;
2159
2160 -- Deal with matching entry in List_Pragmas table
2161
2162 if Full_List
2163 and then List_Pragmas_Index <= List_Pragmas.Last
2164 and then S = List_Pragmas.Table (List_Pragmas_Index).Ploc
2165 then
2166 case List_Pragmas.Table (List_Pragmas_Index).Ptyp is
2167 when Page =>
2168 Write_Char (C);
2169
2170 -- Ignore if on line with errors so that error flags
2171 -- get properly listed with the error line .
2172
2173 if not Errs then
2174 Write_Char (ASCII.FF);
2175 end if;
2176
2177 when List_On =>
2178 List_Pragmas_Mode := True;
2179
2180 if not Line_Number_Output then
2181 Output_Line_Number (Physical_To_Logical (L, Sfile));
2182 Line_Number_Output := True;
2183 end if;
2184
2185 Write_Char (C);
2186
2187 when List_Off =>
2188 Write_Char (C);
2189 List_Pragmas_Mode := False;
2190 end case;
2191
2192 List_Pragmas_Index := List_Pragmas_Index + 1;
2193
2194 -- Normal case (no matching entry in List_Pragmas table)
2195
2196 else
2197 if Errs or List_Pragmas_Mode then
2198 Write_Char (C);
2199 end if;
2200 end if;
2201
2202 Empty_Line := False;
2203 S := S + 1;
2204 end loop;
2205
2206 -- If we have output a source line, then add the line terminator, with
2207 -- training spaces preserved (so we output the line exactly as input).
2208
2209 if Line_Number_Output then
2210 if Empty_Line then
2211 Write_Eol;
2212 else
2213 Write_Eol_Keep_Blanks;
2214 end if;
2215 end if;
2216 end Output_Source_Line;
2217
2218 -----------------------------
2219 -- Remove_Warning_Messages --
2220 -----------------------------
2221
2222 procedure Remove_Warning_Messages (N : Node_Id) is
2223
2224 function Check_For_Warning (N : Node_Id) return Traverse_Result;
2225 -- This function checks one node for a possible warning message
2226
2227 function Check_All_Warnings is new Traverse_Func (Check_For_Warning);
2228 -- This defines the traversal operation
2229
2230 -----------------------
2231 -- Check_For_Warning --
2232 -----------------------
2233
2234 function Check_For_Warning (N : Node_Id) return Traverse_Result is
2235 Loc : constant Source_Ptr := Sloc (N);
2236 E : Error_Msg_Id;
2237
2238 function To_Be_Removed (E : Error_Msg_Id) return Boolean;
2239 -- Returns True for a message that is to be removed. Also adjusts
2240 -- warning count appropriately.
2241
2242 -------------------
2243 -- To_Be_Removed --
2244 -------------------
2245
2246 function To_Be_Removed (E : Error_Msg_Id) return Boolean is
2247 begin
2248 if E /= No_Error_Msg
2249
2250 -- Don't remove if location does not match
2251
2252 and then Errors.Table (E).Optr = Loc
2253
2254 -- Don't remove if not warning/info message. Note that we do
2255 -- not remove style messages here. They are warning messages
2256 -- but not ones we want removed in this context.
2257
2258 and then Errors.Table (E).Warn
2259
2260 -- Don't remove unconditional messages
2261
2262 and then not Errors.Table (E).Uncond
2263 then
2264 Warnings_Detected := Warnings_Detected - 1;
2265
2266 if Errors.Table (E).Info then
2267 Info_Messages := Info_Messages - 1;
2268 end if;
2269
2270 return True;
2271
2272 -- No removal required
2273
2274 else
2275 return False;
2276 end if;
2277 end To_Be_Removed;
2278
2279 -- Start of processing for Check_For_Warnings
2280
2281 begin
2282 while To_Be_Removed (First_Error_Msg) loop
2283 First_Error_Msg := Errors.Table (First_Error_Msg).Next;
2284 end loop;
2285
2286 if First_Error_Msg = No_Error_Msg then
2287 Last_Error_Msg := No_Error_Msg;
2288 end if;
2289
2290 E := First_Error_Msg;
2291 while E /= No_Error_Msg loop
2292 while To_Be_Removed (Errors.Table (E).Next) loop
2293 Errors.Table (E).Next :=
2294 Errors.Table (Errors.Table (E).Next).Next;
2295
2296 if Errors.Table (E).Next = No_Error_Msg then
2297 Last_Error_Msg := E;
2298 end if;
2299 end loop;
2300
2301 E := Errors.Table (E).Next;
2302 end loop;
2303
2304 if Nkind (N) = N_Raise_Constraint_Error
2305 and then Original_Node (N) /= N
2306 and then No (Condition (N))
2307 then
2308 -- Warnings may have been posted on subexpressions of the original
2309 -- tree. We place the original node back on the tree to remove
2310 -- those warnings, whose sloc do not match those of any node in
2311 -- the current tree. Given that we are in unreachable code, this
2312 -- modification to the tree is harmless.
2313
2314 declare
2315 Status : Traverse_Final_Result;
2316
2317 begin
2318 if Is_List_Member (N) then
2319 Set_Condition (N, Original_Node (N));
2320 Status := Check_All_Warnings (Condition (N));
2321 else
2322 Rewrite (N, Original_Node (N));
2323 Status := Check_All_Warnings (N);
2324 end if;
2325
2326 return Status;
2327 end;
2328
2329 else
2330 return OK;
2331 end if;
2332 end Check_For_Warning;
2333
2334 -- Start of processing for Remove_Warning_Messages
2335
2336 begin
2337 if Warnings_Detected /= 0 then
2338 declare
2339 Discard : Traverse_Final_Result;
2340 pragma Warnings (Off, Discard);
2341
2342 begin
2343 Discard := Check_All_Warnings (N);
2344 end;
2345 end if;
2346 end Remove_Warning_Messages;
2347
2348 procedure Remove_Warning_Messages (L : List_Id) is
2349 Stat : Node_Id;
2350 begin
2351 if Is_Non_Empty_List (L) then
2352 Stat := First (L);
2353 while Present (Stat) loop
2354 Remove_Warning_Messages (Stat);
2355 Next (Stat);
2356 end loop;
2357 end if;
2358 end Remove_Warning_Messages;
2359
2360 ----------------------
2361 -- Adjust_Name_Case --
2362 ----------------------
2363
2364 procedure Adjust_Name_Case
2365 (Buf : in out Bounded_String;
2366 Loc : Source_Ptr)
2367 is
2368 begin
2369 -- We have an all lower case name from Namet, and now we want to set
2370 -- the appropriate case. If possible we copy the actual casing from
2371 -- the source. If not we use standard identifier casing.
2372
2373 declare
2374 Src_Ind : constant Source_File_Index := Get_Source_File_Index (Loc);
2375 Sbuffer : Source_Buffer_Ptr;
2376 Ref_Ptr : Integer;
2377 Src_Ptr : Source_Ptr;
2378
2379 begin
2380 Ref_Ptr := 1;
2381 Src_Ptr := Loc;
2382
2383 -- For standard locations, always use mixed case
2384
2385 if Loc <= No_Location then
2386 Set_Casing (Mixed_Case);
2387
2388 else
2389 -- Determine if the reference we are dealing with corresponds to
2390 -- text at the point of the error reference. This will often be
2391 -- the case for simple identifier references, and is the case
2392 -- where we can copy the casing from the source.
2393
2394 Sbuffer := Source_Text (Src_Ind);
2395
2396 while Ref_Ptr <= Buf.Length loop
2397 exit when
2398 Fold_Lower (Sbuffer (Src_Ptr)) /=
2399 Fold_Lower (Buf.Chars (Ref_Ptr));
2400 Ref_Ptr := Ref_Ptr + 1;
2401 Src_Ptr := Src_Ptr + 1;
2402 end loop;
2403
2404 -- If we get through the loop without a mismatch, then output the
2405 -- name the way it is cased in the source program
2406
2407 if Ref_Ptr > Buf.Length then
2408 Src_Ptr := Loc;
2409
2410 for J in 1 .. Buf.Length loop
2411 Buf.Chars (J) := Sbuffer (Src_Ptr);
2412 Src_Ptr := Src_Ptr + 1;
2413 end loop;
2414
2415 -- Otherwise set the casing using the default identifier casing
2416
2417 else
2418 Set_Casing (Buf, Identifier_Casing (Src_Ind));
2419 end if;
2420 end if;
2421 end;
2422 end Adjust_Name_Case;
2423
2424 procedure Adjust_Name_Case (Loc : Source_Ptr) is
2425 begin
2426 Adjust_Name_Case (Global_Name_Buffer, Loc);
2427 end Adjust_Name_Case;
2428
2429 ---------------------------
2430 -- Set_Identifier_Casing --
2431 ---------------------------
2432
2433 procedure Set_Identifier_Casing
2434 (Identifier_Name : System.Address;
2435 File_Name : System.Address)
2436 is
2437 Ident : constant Big_String_Ptr := To_Big_String_Ptr (Identifier_Name);
2438 File : constant Big_String_Ptr := To_Big_String_Ptr (File_Name);
2439 Flen : Natural;
2440
2441 Desired_Case : Casing_Type := Mixed_Case;
2442 -- Casing required for result. Default value of Mixed_Case is used if
2443 -- for some reason we cannot find the right file name in the table.
2444
2445 begin
2446 -- Get length of file name
2447
2448 Flen := 0;
2449 while File (Flen + 1) /= ASCII.NUL loop
2450 Flen := Flen + 1;
2451 end loop;
2452
2453 -- Loop through file names to find matching one. This is a bit slow, but
2454 -- we only do it in error situations so it is not so terrible. Note that
2455 -- if the loop does not exit, then the desired case will be left set to
2456 -- Mixed_Case, this can happen if the name was not in canonical form.
2457
2458 for J in 1 .. Last_Source_File loop
2459 Get_Name_String (Full_Debug_Name (J));
2460
2461 if Name_Len = Flen
2462 and then Name_Buffer (1 .. Name_Len) = String (File (1 .. Flen))
2463 then
2464 Desired_Case := Identifier_Casing (J);
2465 exit;
2466 end if;
2467 end loop;
2468
2469 -- Copy identifier as given to Name_Buffer
2470
2471 for J in Name_Buffer'Range loop
2472 Name_Buffer (J) := Ident (J);
2473
2474 if Name_Buffer (J) = ASCII.NUL then
2475 Name_Len := J - 1;
2476 exit;
2477 end if;
2478 end loop;
2479
2480 Set_Casing (Desired_Case);
2481 end Set_Identifier_Casing;
2482
2483 -----------------------
2484 -- Set_Ignore_Errors --
2485 -----------------------
2486
2487 procedure Set_Ignore_Errors (To : Boolean) is
2488 begin
2489 Errors_Must_Be_Ignored := To;
2490 end Set_Ignore_Errors;
2491
2492 ------------------------------
2493 -- Set_Msg_Insertion_Column --
2494 ------------------------------
2495
2496 procedure Set_Msg_Insertion_Column is
2497 begin
2498 if RM_Column_Check then
2499 Set_Msg_Str (" in column ");
2500 Set_Msg_Int (Int (Error_Msg_Col) + 1);
2501 end if;
2502 end Set_Msg_Insertion_Column;
2503
2504 ----------------------------
2505 -- Set_Msg_Insertion_Node --
2506 ----------------------------
2507
2508 procedure Set_Msg_Insertion_Node is
2509 K : Node_Kind;
2510
2511 begin
2512 Suppress_Message :=
2513 Error_Msg_Node_1 = Error
2514 or else Error_Msg_Node_1 = Any_Type;
2515
2516 if Error_Msg_Node_1 = Empty then
2517 Set_Msg_Blank_Conditional;
2518 Set_Msg_Str ("<empty>");
2519
2520 elsif Error_Msg_Node_1 = Error then
2521 Set_Msg_Blank;
2522 Set_Msg_Str ("<error>");
2523
2524 elsif Error_Msg_Node_1 = Standard_Void_Type then
2525 Set_Msg_Blank;
2526 Set_Msg_Str ("procedure name");
2527
2528 elsif Nkind (Error_Msg_Node_1) in N_Entity
2529 and then Ekind (Error_Msg_Node_1) = E_Anonymous_Access_Subprogram_Type
2530 then
2531 Set_Msg_Blank;
2532 Set_Msg_Str ("access to subprogram");
2533
2534 else
2535 Set_Msg_Blank_Conditional;
2536
2537 -- Output name
2538
2539 K := Nkind (Error_Msg_Node_1);
2540
2541 -- If we have operator case, skip quotes since name of operator
2542 -- itself will supply the required quotations. An operator can be an
2543 -- applied use in an expression or an explicit operator symbol, or an
2544 -- identifier whose name indicates it is an operator.
2545
2546 if K in N_Op
2547 or else K = N_Operator_Symbol
2548 or else K = N_Defining_Operator_Symbol
2549 or else ((K = N_Identifier or else K = N_Defining_Identifier)
2550 and then Is_Operator_Name (Chars (Error_Msg_Node_1)))
2551 then
2552 Set_Msg_Node (Error_Msg_Node_1);
2553
2554 -- Normal case, not an operator, surround with quotes
2555
2556 else
2557 Set_Msg_Quote;
2558 Set_Qualification (Error_Msg_Qual_Level, Error_Msg_Node_1);
2559 Set_Msg_Node (Error_Msg_Node_1);
2560 Set_Msg_Quote;
2561 end if;
2562 end if;
2563
2564 -- The following assignment ensures that a second ampersand insertion
2565 -- character will correspond to the Error_Msg_Node_2 parameter. We
2566 -- suppress possible validity checks in case operating in -gnatVa mode,
2567 -- and Error_Msg_Node_2 is not needed and has not been set.
2568
2569 declare
2570 pragma Suppress (Range_Check);
2571 begin
2572 Error_Msg_Node_1 := Error_Msg_Node_2;
2573 end;
2574 end Set_Msg_Insertion_Node;
2575
2576 --------------------------------------
2577 -- Set_Msg_Insertion_Type_Reference --
2578 --------------------------------------
2579
2580 procedure Set_Msg_Insertion_Type_Reference (Flag : Source_Ptr) is
2581 Ent : Entity_Id;
2582
2583 begin
2584 Set_Msg_Blank;
2585
2586 if Error_Msg_Node_1 = Standard_Void_Type then
2587 Set_Msg_Str ("package or procedure name");
2588 return;
2589
2590 elsif Error_Msg_Node_1 = Standard_Exception_Type then
2591 Set_Msg_Str ("exception name");
2592 return;
2593
2594 elsif Error_Msg_Node_1 = Any_Access
2595 or else Error_Msg_Node_1 = Any_Array
2596 or else Error_Msg_Node_1 = Any_Boolean
2597 or else Error_Msg_Node_1 = Any_Character
2598 or else Error_Msg_Node_1 = Any_Composite
2599 or else Error_Msg_Node_1 = Any_Discrete
2600 or else Error_Msg_Node_1 = Any_Fixed
2601 or else Error_Msg_Node_1 = Any_Integer
2602 or else Error_Msg_Node_1 = Any_Modular
2603 or else Error_Msg_Node_1 = Any_Numeric
2604 or else Error_Msg_Node_1 = Any_Real
2605 or else Error_Msg_Node_1 = Any_Scalar
2606 or else Error_Msg_Node_1 = Any_String
2607 then
2608 Get_Unqualified_Decoded_Name_String (Chars (Error_Msg_Node_1));
2609 Set_Msg_Name_Buffer;
2610 return;
2611
2612 elsif Error_Msg_Node_1 = Universal_Real then
2613 Set_Msg_Str ("type universal real");
2614 return;
2615
2616 elsif Error_Msg_Node_1 = Universal_Integer then
2617 Set_Msg_Str ("type universal integer");
2618 return;
2619
2620 elsif Error_Msg_Node_1 = Universal_Fixed then
2621 Set_Msg_Str ("type universal fixed");
2622 return;
2623 end if;
2624
2625 -- Special case of anonymous array
2626
2627 if Nkind (Error_Msg_Node_1) in N_Entity
2628 and then Is_Array_Type (Error_Msg_Node_1)
2629 and then Present (Related_Array_Object (Error_Msg_Node_1))
2630 then
2631 Set_Msg_Str ("type of ");
2632 Set_Msg_Node (Related_Array_Object (Error_Msg_Node_1));
2633 Set_Msg_Str (" declared");
2634 Set_Msg_Insertion_Line_Number
2635 (Sloc (Related_Array_Object (Error_Msg_Node_1)), Flag);
2636 return;
2637 end if;
2638
2639 -- If we fall through, it is not a special case, so first output
2640 -- the name of the type, preceded by private for a private type
2641
2642 if Is_Private_Type (Error_Msg_Node_1) then
2643 Set_Msg_Str ("private type ");
2644 else
2645 Set_Msg_Str ("type ");
2646 end if;
2647
2648 Ent := Error_Msg_Node_1;
2649
2650 if Is_Internal_Name (Chars (Ent)) then
2651 Unwind_Internal_Type (Ent);
2652 end if;
2653
2654 -- Types in Standard are displayed as "Standard.name"
2655
2656 if Sloc (Ent) <= Standard_Location then
2657 Set_Msg_Quote;
2658 Set_Msg_Str ("Standard.");
2659 Set_Msg_Node (Ent);
2660 Add_Class;
2661 Set_Msg_Quote;
2662
2663 -- Types in other language defined units are displayed as
2664 -- "package-name.type-name"
2665
2666 elsif
2667 Is_Predefined_File_Name (Unit_File_Name (Get_Source_Unit (Ent)))
2668 then
2669 Get_Unqualified_Decoded_Name_String
2670 (Unit_Name (Get_Source_Unit (Ent)));
2671 Name_Len := Name_Len - 2;
2672 Set_Msg_Blank_Conditional;
2673 Set_Msg_Quote;
2674 Set_Casing (Mixed_Case);
2675 Set_Msg_Name_Buffer;
2676 Set_Msg_Char ('.');
2677 Set_Casing (Mixed_Case);
2678 Set_Msg_Node (Ent);
2679 Add_Class;
2680 Set_Msg_Quote;
2681
2682 -- All other types display as "type name" defined at line xxx
2683 -- possibly qualified if qualification is requested.
2684
2685 else
2686 Set_Msg_Quote;
2687 Set_Qualification (Error_Msg_Qual_Level, Ent);
2688 Set_Msg_Node (Ent);
2689 Add_Class;
2690
2691 -- If we did not print a name (e.g. in the case of an anonymous
2692 -- subprogram type), there is no name to print, so remove quotes.
2693
2694 if Buffer_Ends_With ('"') then
2695 Buffer_Remove ('"');
2696 else
2697 Set_Msg_Quote;
2698 end if;
2699 end if;
2700
2701 -- If the original type did not come from a predefined file, add the
2702 -- location where the type was defined.
2703
2704 if Sloc (Error_Msg_Node_1) > Standard_Location
2705 and then
2706 not Is_Predefined_File_Name
2707 (Unit_File_Name (Get_Source_Unit (Error_Msg_Node_1)))
2708 then
2709 Set_Msg_Str (" defined");
2710 Set_Msg_Insertion_Line_Number (Sloc (Error_Msg_Node_1), Flag);
2711
2712 -- If it did come from a predefined file, deal with the case where
2713 -- this was a file with a generic instantiation from elsewhere.
2714
2715 else
2716 if Sloc (Error_Msg_Node_1) > Standard_Location then
2717 declare
2718 Iloc : constant Source_Ptr :=
2719 Instantiation_Location (Sloc (Error_Msg_Node_1));
2720
2721 begin
2722 if Iloc /= No_Location
2723 and then not Suppress_Instance_Location
2724 then
2725 Set_Msg_Str (" from instance");
2726 Set_Msg_Insertion_Line_Number (Iloc, Flag);
2727 end if;
2728 end;
2729 end if;
2730 end if;
2731 end Set_Msg_Insertion_Type_Reference;
2732
2733 ---------------------------------
2734 -- Set_Msg_Insertion_Unit_Name --
2735 ---------------------------------
2736
2737 procedure Set_Msg_Insertion_Unit_Name (Suffix : Boolean := True) is
2738 begin
2739 if Error_Msg_Unit_1 = No_Unit_Name then
2740 null;
2741
2742 elsif Error_Msg_Unit_1 = Error_Unit_Name then
2743 Set_Msg_Blank;
2744 Set_Msg_Str ("<error>");
2745
2746 else
2747 Get_Unit_Name_String (Error_Msg_Unit_1, Suffix);
2748 Set_Msg_Blank;
2749 Set_Msg_Quote;
2750 Set_Msg_Name_Buffer;
2751 Set_Msg_Quote;
2752 end if;
2753
2754 -- The following assignment ensures that a second percent insertion
2755 -- character will correspond to the Error_Msg_Unit_2 parameter. We
2756 -- suppress possible validity checks in case operating in -gnatVa mode,
2757 -- and Error_Msg_Unit_2 is not needed and has not been set.
2758
2759 declare
2760 pragma Suppress (Range_Check);
2761 begin
2762 Error_Msg_Unit_1 := Error_Msg_Unit_2;
2763 end;
2764 end Set_Msg_Insertion_Unit_Name;
2765
2766 ------------------
2767 -- Set_Msg_Node --
2768 ------------------
2769
2770 procedure Set_Msg_Node (Node : Node_Id) is
2771 Loc : Source_Ptr;
2772 Ent : Entity_Id;
2773 Nam : Name_Id;
2774
2775 begin
2776 case Nkind (Node) is
2777 when N_Designator =>
2778 Set_Msg_Node (Name (Node));
2779 Set_Msg_Char ('.');
2780 Set_Msg_Node (Identifier (Node));
2781 return;
2782
2783 when N_Defining_Program_Unit_Name =>
2784 Set_Msg_Node (Name (Node));
2785 Set_Msg_Char ('.');
2786 Set_Msg_Node (Defining_Identifier (Node));
2787 return;
2788
2789 when N_Selected_Component | N_Expanded_Name =>
2790 Set_Msg_Node (Prefix (Node));
2791 Set_Msg_Char ('.');
2792 Set_Msg_Node (Selector_Name (Node));
2793 return;
2794
2795 when others =>
2796 null;
2797 end case;
2798
2799 -- The only remaining possibilities are identifiers, defining
2800 -- identifiers, pragmas, and pragma argument associations.
2801
2802 if Nkind (Node) = N_Pragma then
2803 Nam := Pragma_Name (Node);
2804 Loc := Sloc (Node);
2805
2806 -- The other cases have Chars fields
2807
2808 -- First deal with internal names, which generally represent something
2809 -- gone wrong. First attempt: if this is a rewritten node that rewrites
2810 -- something with a Chars field that is not an internal name, use that.
2811
2812 elsif Is_Internal_Name (Chars (Node))
2813 and then Nkind (Original_Node (Node)) in N_Has_Chars
2814 and then not Is_Internal_Name (Chars (Original_Node (Node)))
2815 then
2816 Nam := Chars (Original_Node (Node));
2817 Loc := Sloc (Original_Node (Node));
2818
2819 -- Another shot for internal names, in the case of internal type names,
2820 -- we try to find a reasonable representation for the external name.
2821
2822 elsif Is_Internal_Name (Chars (Node))
2823 and then
2824 ((Is_Entity_Name (Node)
2825 and then Present (Entity (Node))
2826 and then Is_Type (Entity (Node)))
2827 or else
2828 (Nkind (Node) = N_Defining_Identifier and then Is_Type (Node)))
2829 then
2830 if Nkind (Node) = N_Identifier then
2831 Ent := Entity (Node);
2832 else
2833 Ent := Node;
2834 end if;
2835
2836 Loc := Sloc (Ent);
2837
2838 -- If the type is the designated type of an access_to_subprogram,
2839 -- then there is no name to provide in the call.
2840
2841 if Ekind (Ent) = E_Subprogram_Type then
2842 return;
2843
2844 -- Otherwise, we will be able to find some kind of name to output
2845
2846 else
2847 Unwind_Internal_Type (Ent);
2848 Nam := Chars (Ent);
2849 end if;
2850
2851 -- If not internal name, or if we could not find a reasonable possible
2852 -- substitution for the internal name, just use name in Chars field.
2853
2854 else
2855 Nam := Chars (Node);
2856 Loc := Sloc (Node);
2857 end if;
2858
2859 -- At this stage, the name to output is in Nam
2860
2861 Get_Unqualified_Decoded_Name_String (Nam);
2862
2863 -- Remove trailing upper case letters from the name (useful for
2864 -- dealing with some cases of internal names).
2865
2866 while Name_Len > 1 and then Name_Buffer (Name_Len) in 'A' .. 'Z' loop
2867 Name_Len := Name_Len - 1;
2868 end loop;
2869
2870 -- If we have any of the names from standard that start with the
2871 -- characters "any " (e.g. Any_Type), then kill the message since
2872 -- almost certainly it is a junk cascaded message.
2873
2874 if Name_Len > 4
2875 and then Name_Buffer (1 .. 4) = "any "
2876 then
2877 Kill_Message := True;
2878 end if;
2879
2880 -- If we still have an internal name, kill the message (will only
2881 -- work if we already had errors!)
2882
2883 if Is_Internal_Name then
2884 Kill_Message := True;
2885 end if;
2886 -- Remaining step is to adjust casing and possibly add 'Class
2887
2888 Adjust_Name_Case (Global_Name_Buffer, Loc);
2889 Set_Msg_Name_Buffer;
2890 Add_Class;
2891 end Set_Msg_Node;
2892
2893 ------------------
2894 -- Set_Msg_Text --
2895 ------------------
2896
2897 procedure Set_Msg_Text (Text : String; Flag : Source_Ptr) is
2898 C : Character; -- Current character
2899 P : Natural; -- Current index;
2900
2901 procedure Skip_Msg_Insertion_Warning (C : Character);
2902 -- Deal with ? ?? ?x? ?X? ?*? ?$? insertion sequences (and the same
2903 -- sequences using < instead of ?). The caller has already bumped
2904 -- the pointer past the initial ? or < and C is set to this initial
2905 -- character (? or <). This procedure skips past the rest of the
2906 -- sequence. We do not need to set Msg_Insertion_Char, since this
2907 -- was already done during the message prescan.
2908
2909 --------------------------------
2910 -- Skip_Msg_Insertion_Warning --
2911 --------------------------------
2912
2913 procedure Skip_Msg_Insertion_Warning (C : Character) is
2914 begin
2915 if P <= Text'Last and then Text (P) = C then
2916 P := P + 1;
2917
2918 elsif P + 1 <= Text'Last
2919 and then (Text (P) in 'a' .. 'z'
2920 or else
2921 Text (P) in 'A' .. 'Z'
2922 or else
2923 Text (P) = '*'
2924 or else
2925 Text (P) = '$')
2926 and then Text (P + 1) = C
2927 then
2928 P := P + 2;
2929 end if;
2930 end Skip_Msg_Insertion_Warning;
2931
2932 -- Start of processing for Set_Msg_Text
2933
2934 begin
2935 Manual_Quote_Mode := False;
2936 Msglen := 0;
2937 Flag_Source := Get_Source_File_Index (Flag);
2938
2939 -- Skip info: at start, we have recorded this in Is_Info_Msg, and this
2940 -- will be used (Info field in error message object) to put back the
2941 -- string when it is printed. We need to do this, or we get confused
2942 -- with instantiation continuations.
2943
2944 if Text'Length > 6
2945 and then Text (Text'First .. Text'First + 5) = "info: "
2946 then
2947 P := Text'First + 6;
2948 else
2949 P := Text'First;
2950 end if;
2951
2952 -- Loop through characters of message
2953
2954 while P <= Text'Last loop
2955 C := Text (P);
2956 P := P + 1;
2957
2958 -- Check for insertion character or sequence
2959
2960 case C is
2961 when '%' =>
2962 if P <= Text'Last and then Text (P) = '%' then
2963 P := P + 1;
2964 Set_Msg_Insertion_Name_Literal;
2965 else
2966 Set_Msg_Insertion_Name;
2967 end if;
2968
2969 when '$' =>
2970 if P <= Text'Last and then Text (P) = '$' then
2971 P := P + 1;
2972 Set_Msg_Insertion_Unit_Name (Suffix => False);
2973 else
2974 Set_Msg_Insertion_Unit_Name;
2975 end if;
2976
2977 when '{' =>
2978 Set_Msg_Insertion_File_Name;
2979
2980 when '}' =>
2981 Set_Msg_Insertion_Type_Reference (Flag);
2982
2983 when '*' =>
2984 Set_Msg_Insertion_Reserved_Name;
2985
2986 when '&' =>
2987 Set_Msg_Insertion_Node;
2988
2989 when '#' =>
2990 Set_Msg_Insertion_Line_Number (Error_Msg_Sloc, Flag);
2991
2992 when '\' =>
2993 Continuation := True;
2994
2995 if Text (P) = '\' then
2996 Continuation_New_Line := True;
2997 P := P + 1;
2998 end if;
2999
3000 when '@' =>
3001 Set_Msg_Insertion_Column;
3002
3003 when '>' =>
3004 Set_Msg_Insertion_Run_Time_Name;
3005
3006 when '^' =>
3007 Set_Msg_Insertion_Uint;
3008
3009 when '`' =>
3010 Manual_Quote_Mode := not Manual_Quote_Mode;
3011 Set_Msg_Char ('"');
3012
3013 when '!' =>
3014 null; -- already dealt with
3015
3016 when '?' =>
3017 Skip_Msg_Insertion_Warning ('?');
3018
3019 when '<' =>
3020 Skip_Msg_Insertion_Warning ('<');
3021
3022 when '|' =>
3023 null; -- already dealt with
3024
3025 when ''' =>
3026 Set_Msg_Char (Text (P));
3027 P := P + 1;
3028
3029 when '~' =>
3030 Set_Msg_Str (Error_Msg_String (1 .. Error_Msg_Strlen));
3031
3032 -- Upper case letter
3033
3034 when 'A' .. 'Z' =>
3035
3036 -- Start of reserved word if two or more
3037
3038 if P <= Text'Last and then Text (P) in 'A' .. 'Z' then
3039 P := P - 1;
3040 Set_Msg_Insertion_Reserved_Word (Text, P);
3041
3042 -- Single upper case letter is just inserted
3043
3044 else
3045 Set_Msg_Char (C);
3046 end if;
3047
3048 -- '[' (will be/would have been raised at run time)
3049
3050 when '[' =>
3051 if Is_Warning_Msg then
3052 Set_Msg_Str ("will be raised at run time");
3053 else
3054 Set_Msg_Str ("would have been raised at run time");
3055 end if;
3056
3057 -- ']' (may be/might have been raised at run time)
3058
3059 when ']' =>
3060 if Is_Warning_Msg then
3061 Set_Msg_Str ("may be raised at run time");
3062 else
3063 Set_Msg_Str ("might have been raised at run time");
3064 end if;
3065
3066 -- Normal character with no special treatment
3067
3068 when others =>
3069 Set_Msg_Char (C);
3070 end case;
3071 end loop;
3072 end Set_Msg_Text;
3073
3074 ----------------
3075 -- Set_Posted --
3076 ----------------
3077
3078 procedure Set_Posted (N : Node_Id) is
3079 P : Node_Id;
3080
3081 begin
3082 if Is_Serious_Error then
3083
3084 -- We always set Error_Posted on the node itself
3085
3086 Set_Error_Posted (N);
3087
3088 -- If it is a subexpression, then set Error_Posted on parents up to
3089 -- and including the first non-subexpression construct. This helps
3090 -- avoid cascaded error messages within a single expression.
3091
3092 P := N;
3093 loop
3094 P := Parent (P);
3095 exit when No (P);
3096 Set_Error_Posted (P);
3097 exit when Nkind (P) not in N_Subexpr;
3098 end loop;
3099
3100 if Nkind_In (P, N_Pragma_Argument_Association,
3101 N_Component_Association,
3102 N_Discriminant_Association,
3103 N_Generic_Association,
3104 N_Parameter_Association)
3105 then
3106 Set_Error_Posted (Parent (P));
3107 end if;
3108
3109 -- A special check, if we just posted an error on an attribute
3110 -- definition clause, then also set the entity involved as posted.
3111 -- For example, this stops complaining about the alignment after
3112 -- complaining about the size, which is likely to be useless.
3113
3114 if Nkind (P) = N_Attribute_Definition_Clause then
3115 if Is_Entity_Name (Name (P)) then
3116 Set_Error_Posted (Entity (Name (P)));
3117 end if;
3118 end if;
3119 end if;
3120 end Set_Posted;
3121
3122 -----------------------
3123 -- Set_Qualification --
3124 -----------------------
3125
3126 procedure Set_Qualification (N : Nat; E : Entity_Id) is
3127 begin
3128 if N /= 0 and then Scope (E) /= Standard_Standard then
3129 Set_Qualification (N - 1, Scope (E));
3130 Set_Msg_Node (Scope (E));
3131 Set_Msg_Char ('.');
3132 end if;
3133 end Set_Qualification;
3134
3135 ------------------------
3136 -- Special_Msg_Delete --
3137 ------------------------
3138
3139 -- Is it really right to have all this specialized knowledge in errout?
3140
3141 function Special_Msg_Delete
3142 (Msg : String;
3143 N : Node_Or_Entity_Id;
3144 E : Node_Or_Entity_Id) return Boolean
3145 is
3146 begin
3147 -- Never delete messages in -gnatdO mode
3148
3149 if Debug_Flag_OO then
3150 return False;
3151
3152 -- Processing for "atomic access cannot be guaranteed"
3153
3154 elsif Msg = "atomic access to & cannot be guaranteed" then
3155
3156 -- When an atomic object refers to a non-atomic type in the same
3157 -- scope, we implicitly make the type atomic. In the non-error case
3158 -- this is surely safe (and in fact prevents an error from occurring
3159 -- if the type is not atomic by default). But if the object cannot be
3160 -- made atomic, then we introduce an extra junk message by this
3161 -- manipulation, which we get rid of here.
3162
3163 -- We identify this case by the fact that it references a type for
3164 -- which Is_Atomic is set, but there is no Atomic pragma setting it.
3165
3166 if Is_Type (E)
3167 and then Is_Atomic (E)
3168 and then No (Get_Rep_Pragma (E, Name_Atomic))
3169 then
3170 return True;
3171 end if;
3172
3173 -- Similar processing for "volatile full access cannot be guaranteed"
3174
3175 elsif Msg = "volatile full access to & cannot be guaranteed" then
3176 if Is_Type (E)
3177 and then Is_Volatile_Full_Access (E)
3178 and then No (Get_Rep_Pragma (E, Name_Volatile_Full_Access))
3179 then
3180 return True;
3181 end if;
3182
3183 -- Processing for "Size too small" messages
3184
3185 elsif Msg = "size for& too small, minimum allowed is ^" then
3186
3187 -- Suppress "size too small" errors in CodePeer mode, since code may
3188 -- be analyzed in a different configuration than the one used for
3189 -- compilation. Even when the configurations match, this message
3190 -- may be issued on correct code, because pragma Pack is ignored
3191 -- in CodePeer mode.
3192
3193 if CodePeer_Mode then
3194 return True;
3195
3196 -- When a size is wrong for a frozen type there is no explicit size
3197 -- clause, and other errors have occurred, suppress the message,
3198 -- since it is likely that this size error is a cascaded result of
3199 -- other errors. The reason we eliminate unfrozen types is that
3200 -- messages issued before the freeze type are for sure OK.
3201
3202 elsif Is_Frozen (E)
3203 and then Serious_Errors_Detected > 0
3204 and then Nkind (N) /= N_Component_Clause
3205 and then Nkind (Parent (N)) /= N_Component_Clause
3206 and then
3207 No (Get_Attribute_Definition_Clause (E, Attribute_Size))
3208 and then
3209 No (Get_Attribute_Definition_Clause (E, Attribute_Object_Size))
3210 and then
3211 No (Get_Attribute_Definition_Clause (E, Attribute_Value_Size))
3212 then
3213 return True;
3214 end if;
3215 end if;
3216
3217 -- All special tests complete, so go ahead with message
3218
3219 return False;
3220 end Special_Msg_Delete;
3221
3222 -----------------
3223 -- SPARK_Msg_N --
3224 -----------------
3225
3226 procedure SPARK_Msg_N (Msg : String; N : Node_Or_Entity_Id) is
3227 begin
3228 if SPARK_Mode /= Off then
3229 Error_Msg_N (Msg, N);
3230 end if;
3231 end SPARK_Msg_N;
3232
3233 ------------------
3234 -- SPARK_Msg_NE --
3235 ------------------
3236
3237 procedure SPARK_Msg_NE
3238 (Msg : String;
3239 N : Node_Or_Entity_Id;
3240 E : Node_Or_Entity_Id)
3241 is
3242 begin
3243 if SPARK_Mode /= Off then
3244 Error_Msg_NE (Msg, N, E);
3245 end if;
3246 end SPARK_Msg_NE;
3247
3248 --------------------------
3249 -- Unwind_Internal_Type --
3250 --------------------------
3251
3252 procedure Unwind_Internal_Type (Ent : in out Entity_Id) is
3253 Derived : Boolean := False;
3254 Mchar : Character;
3255 Old_Ent : Entity_Id;
3256
3257 begin
3258 -- Undo placement of a quote, since we will put it back later
3259
3260 Mchar := Msg_Buffer (Msglen);
3261
3262 if Mchar = '"' then
3263 Msglen := Msglen - 1;
3264 end if;
3265
3266 -- The loop here deals with recursive types, we are trying to find a
3267 -- related entity that is not an implicit type. Note that the check with
3268 -- Old_Ent stops us from getting "stuck". Also, we don't output the
3269 -- "type derived from" message more than once in the case where we climb
3270 -- up multiple levels.
3271
3272 Find : loop
3273 Old_Ent := Ent;
3274
3275 -- Implicit access type, use directly designated type In Ada 2005,
3276 -- the designated type may be an anonymous access to subprogram, in
3277 -- which case we can only point to its definition.
3278
3279 if Is_Access_Type (Ent) then
3280 if Ekind (Ent) = E_Access_Subprogram_Type
3281 or else Ekind (Ent) = E_Anonymous_Access_Subprogram_Type
3282 or else Is_Access_Protected_Subprogram_Type (Ent)
3283 then
3284 Ent := Directly_Designated_Type (Ent);
3285
3286 if not Comes_From_Source (Ent) then
3287 if Buffer_Ends_With ("type ") then
3288 Buffer_Remove ("type ");
3289 end if;
3290 end if;
3291
3292 if Ekind (Ent) = E_Function then
3293 Set_Msg_Str ("access to function ");
3294 elsif Ekind (Ent) = E_Procedure then
3295 Set_Msg_Str ("access to procedure ");
3296 else
3297 Set_Msg_Str ("access to subprogram");
3298 end if;
3299
3300 exit Find;
3301
3302 -- Type is access to object, named or anonymous
3303
3304 else
3305 Set_Msg_Str ("access to ");
3306 Ent := Directly_Designated_Type (Ent);
3307 end if;
3308
3309 -- Classwide type
3310
3311 elsif Is_Class_Wide_Type (Ent) then
3312 Class_Flag := True;
3313 Ent := Root_Type (Ent);
3314
3315 -- Use base type if this is a subtype
3316
3317 elsif Ent /= Base_Type (Ent) then
3318 Buffer_Remove ("type ");
3319
3320 -- Avoid duplication "subtype of subtype of", and also replace
3321 -- "derived from subtype of" simply by "derived from"
3322
3323 if not Buffer_Ends_With ("subtype of ")
3324 and then not Buffer_Ends_With ("derived from ")
3325 then
3326 Set_Msg_Str ("subtype of ");
3327 end if;
3328
3329 Ent := Base_Type (Ent);
3330
3331 -- If this is a base type with a first named subtype, use the first
3332 -- named subtype instead. This is not quite accurate in all cases,
3333 -- but it makes too much noise to be accurate and add 'Base in all
3334 -- cases. Note that we only do this is the first named subtype is not
3335 -- itself an internal name. This avoids the obvious loop (subtype ->
3336 -- basetype -> subtype) which would otherwise occur).
3337
3338 else
3339 declare
3340 FST : constant Entity_Id := First_Subtype (Ent);
3341
3342 begin
3343 if not Is_Internal_Name (Chars (FST)) then
3344 Ent := FST;
3345 exit Find;
3346
3347 -- Otherwise use root type
3348
3349 else
3350 if not Derived then
3351 Buffer_Remove ("type ");
3352
3353 -- Test for "subtype of type derived from" which seems
3354 -- excessive and is replaced by "type derived from".
3355
3356 Buffer_Remove ("subtype of");
3357
3358 -- Avoid duplicated "type derived from type derived from"
3359
3360 if not Buffer_Ends_With ("type derived from ") then
3361 Set_Msg_Str ("type derived from ");
3362 end if;
3363
3364 Derived := True;
3365 end if;
3366 end if;
3367 end;
3368
3369 Ent := Etype (Ent);
3370 end if;
3371
3372 -- If we are stuck in a loop, get out and settle for the internal
3373 -- name after all. In this case we set to kill the message if it is
3374 -- not the first error message (we really try hard not to show the
3375 -- dirty laundry of the implementation to the poor user).
3376
3377 if Ent = Old_Ent then
3378 Kill_Message := True;
3379 exit Find;
3380 end if;
3381
3382 -- Get out if we finally found a non-internal name to use
3383
3384 exit Find when not Is_Internal_Name (Chars (Ent));
3385 end loop Find;
3386
3387 if Mchar = '"' then
3388 Set_Msg_Char ('"');
3389 end if;
3390 end Unwind_Internal_Type;
3391
3392 --------------------
3393 -- Warn_Insertion --
3394 --------------------
3395
3396 function Warn_Insertion return String is
3397 begin
3398 case Warning_Msg_Char is
3399 when '?' =>
3400 return "??";
3401 when 'a' .. 'z' | 'A' .. 'Z' | '*' | '$' =>
3402 return '?' & Warning_Msg_Char & '?';
3403 when ' ' =>
3404 return "?";
3405 when others =>
3406 raise Program_Error;
3407 end case;
3408 end Warn_Insertion;
3409
3410 end Errout;