1 ------------------------------------------------------------------------------
3 -- GNAT COMPILER COMPONENTS --
9 -- Copyright (C) 1992-2013, Free Software Foundation, Inc. --
11 -- GNAT is free software; you can redistribute it and/or modify it under --
12 -- terms of the GNU General Public License as published by the Free Soft- --
13 -- ware Foundation; either version 3, or (at your option) any later ver- --
14 -- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
15 -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
16 -- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License --
17 -- for more details. You should have received a copy of the GNU General --
18 -- Public License distributed with GNAT; see file COPYING3. If not, go to --
19 -- http://www.gnu.org/licenses for a complete copy of the license. --
21 -- GNAT was originally developed by the GNAT team at New York University. --
22 -- Extensive contributions were provided by Ada Core Technologies Inc. --
24 ------------------------------------------------------------------------------
26 -- 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
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 Hostparm; use Hostparm;
43 with Nlists; use Nlists;
44 with Output; use Output;
45 with Scans; use Scans;
46 with Sem_Aux; use Sem_Aux;
47 with Sinput; use Sinput;
48 with Sinfo; use Sinfo;
49 with Snames; use Snames;
50 with Stand; use Stand;
51 with Stylesw; use Stylesw;
52 with Uname; use Uname;
54 package body Errout is
56 Errors_Must_Be_Ignored : Boolean := False;
57 -- Set to True by procedure Set_Ignore_Errors (True), when calls to error
58 -- message procedures should be ignored (when parsing irrelevant text in
59 -- sources being preprocessed).
61 Finalize_Called : Boolean := False;
62 -- Set True if the Finalize routine has been called
64 Warn_On_Instance : Boolean;
65 -- Flag set true for warning message to be posted on instance
67 ------------------------------------
68 -- Table of Non-Instance Messages --
69 ------------------------------------
71 -- This table contains an entry for every error message processed by the
72 -- Error_Msg routine that is not posted on generic (or inlined) instance.
73 -- As explained in further detail in the Error_Msg procedure body, this
74 -- table is used to avoid posting redundant messages on instances.
76 type NIM_Record is record
80 -- Type used to store text and location of one message
82 package Non_Instance_Msgs is new Table.Table (
83 Table_Component_Type => NIM_Record,
84 Table_Index_Type => Int,
87 Table_Increment => 100,
88 Table_Name => "Non_Instance_Msgs");
90 -----------------------
91 -- Local Subprograms --
92 -----------------------
94 procedure Error_Msg_Internal
99 -- This is the low level routine used to post messages after dealing with
100 -- the issue of messages placed on instantiations (which get broken up
101 -- into separate calls in Error_Msg). Sptr is the location on which the
102 -- flag will be placed in the output. In the case where the flag is on
103 -- the template, this points directly to the template, not to one of the
104 -- instantiation copies of the template. Optr is the original location
105 -- used to flag the error, and this may indeed point to an instantiation
106 -- copy. So typically we can see Optr pointing to the template location
107 -- in an instantiation copy when Sptr points to the source location of
108 -- the actual instantiation (i.e the line with the new). Msg_Cont is
109 -- set true if this is a continuation message.
111 function No_Warnings (N : Node_Or_Entity_Id) return Boolean;
112 -- Determines if warnings should be suppressed for the given node
114 function OK_Node (N : Node_Id) return Boolean;
115 -- Determines if a node is an OK node to place an error message on (return
116 -- True) or if the error message should be suppressed (return False). A
117 -- message is suppressed if the node already has an error posted on it,
118 -- or if it refers to an Etype that has an error posted on it, or if
119 -- it references an Entity that has an error posted on it.
121 procedure Output_Source_Line
122 (L : Physical_Line_Number;
123 Sfile : Source_File_Index;
125 -- Outputs text of source line L, in file S, together with preceding line
126 -- number, as described above for Output_Line_Number. The Errs parameter
127 -- indicates if there are errors attached to the line, which forces
128 -- listing on, even in the presence of pragma List (Off).
130 procedure Set_Msg_Insertion_Column;
131 -- Handle column number insertion (@ insertion character)
133 procedure Set_Msg_Insertion_Node;
134 -- Handle node (name from node) insertion (& insertion character)
136 procedure Set_Msg_Insertion_Type_Reference (Flag : Source_Ptr);
137 -- Handle type reference (right brace insertion character). Flag is the
138 -- location of the flag, which is provided for the internal call to
139 -- Set_Msg_Insertion_Line_Number,
141 procedure Set_Msg_Insertion_Unit_Name (Suffix : Boolean := True);
142 -- Handle unit name insertion ($ insertion character). Depending on Boolean
143 -- parameter Suffix, (spec) or (body) is appended after the unit name.
145 procedure Set_Msg_Node (Node : Node_Id);
146 -- Add the sequence of characters for the name associated with the given
147 -- node to the current message. For N_Designator, N_Selected_Component,
148 -- N_Defining_Program_Unit_Name, and N_Expanded_Name, the Prefix is
151 procedure Set_Msg_Text (Text : String; Flag : Source_Ptr);
152 -- Add a sequence of characters to the current message. The characters may
153 -- be one of the special insertion characters (see documentation in spec).
154 -- Flag is the location at which the error is to be posted, which is used
155 -- to determine whether or not the # insertion needs a file name. The
156 -- variables Msg_Buffer are set on return Msglen.
158 procedure Set_Posted (N : Node_Id);
159 -- Sets the Error_Posted flag on the given node, and all its parents
160 -- that are subexpressions and then on the parent non-subexpression
161 -- construct that contains the original expression (this reduces the
162 -- number of cascaded messages). Note that this call only has an effect
163 -- for a serious error. For a non-serious error, it has no effect.
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.
169 function Special_Msg_Delete
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.
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.
192 procedure VMS_Convert;
193 -- This procedure has no effect if called when the host is not OpenVMS. If
194 -- the host is indeed OpenVMS, then the error message stored in Msg_Buffer
195 -- is scanned for appearances of switch names which need converting to
196 -- corresponding VMS qualifier names. See Gnames/Vnames table in Errout
197 -- spec for precise definition of the conversion that is performed by this
198 -- routine in OpenVMS mode.
200 -----------------------
201 -- Change_Error_Text --
202 -----------------------
204 procedure Change_Error_Text (Error_Id : Error_Msg_Id; New_Msg : String) is
205 Save_Next : Error_Msg_Id;
206 Err_Id : Error_Msg_Id := Error_Id;
209 Set_Msg_Text (New_Msg, Errors.Table (Error_Id).Sptr);
210 Errors.Table (Error_Id).Text := new String'(Msg_Buffer (1 .. Msglen));
212 -- If in immediate error message mode, output modified error message now
213 -- This is just a bit tricky, because we want to output just a single
214 -- message, and the messages we modified is already linked in. We solve
215 -- this by temporarily resetting its forward pointer to empty.
217 if Debug_Flag_OO then
218 Save_Next := Errors.Table (Error_Id).Next;
219 Errors.Table (Error_Id).Next := No_Error_Msg;
222 (Errors.Table (Error_Id).Line, Errors.Table (Error_Id).Sfile, True);
223 Output_Error_Msgs (Err_Id);
224 Errors.Table (Error_Id).Next := Save_Next;
226 end Change_Error_Text;
228 ------------------------
229 -- Compilation_Errors --
230 ------------------------
232 function Compilation_Errors return Boolean is
234 if not Finalize_Called then
237 return Erroutc.Compilation_Errors;
239 end Compilation_Errors;
245 -- Error_Msg posts a flag at the given location, except that if the
246 -- Flag_Location points within a generic template and corresponds to an
247 -- instantiation of this generic template, then the actual message will be
248 -- posted on the generic instantiation, along with additional messages
249 -- referencing the generic declaration.
251 procedure Error_Msg (Msg : String; Flag_Location : Source_Ptr) is
252 Sindex : Source_File_Index;
253 -- Source index for flag location
255 Orig_Loc : Source_Ptr;
256 -- Original location of Flag_Location (i.e. location in original
257 -- template in instantiation case, otherwise unchanged).
260 -- It is a fatal error to issue an error message when scanning from the
261 -- internal source buffer (see Sinput for further documentation)
263 pragma Assert (Sinput.Source /= Internal_Source_Ptr);
265 -- Return if all errors are to be ignored
267 if Errors_Must_Be_Ignored then
271 -- If we already have messages, and we are trying to place a message at
272 -- No_Location or in package Standard, then just ignore the attempt
273 -- since we assume that what is happening is some cascaded junk. Note
274 -- that this is safe in the sense that proceeding will surely bomb.
276 if Flag_Location < First_Source_Ptr
277 and then Total_Errors_Detected > 0
282 -- Start of processing for new message
284 Sindex := Get_Source_File_Index (Flag_Location);
285 Test_Style_Warning_Serious_Unconditional_Msg (Msg);
286 Orig_Loc := Original_Location (Flag_Location);
288 -- If the current location is in an instantiation, the issue arises of
289 -- whether to post the message on the template or the instantiation.
291 -- The way we decide is to see if we have posted the same message on
292 -- the template when we compiled the template (the template is always
293 -- compiled before any instantiations). For this purpose, we use a
294 -- separate table of messages. The reason we do this is twofold:
296 -- First, the messages can get changed by various processing
297 -- including the insertion of tokens etc, making it hard to
298 -- do the comparison.
300 -- Second, we will suppress a warning on a template if it is not in
301 -- the current extended source unit. That's reasonable and means we
302 -- don't want the warning on the instantiation here either, but it
303 -- does mean that the main error table would not in any case include
306 if Flag_Location = Orig_Loc then
307 Non_Instance_Msgs.Append ((new String'(Msg), Flag_Location));
308 Warn_On_Instance := False;
310 -- Here we have an instance message
313 -- Delete if debug flag off, and this message duplicates a message
314 -- already posted on the corresponding template
316 if not Debug_Flag_GG then
317 for J in Non_Instance_Msgs.First .. Non_Instance_Msgs.Last loop
318 if Msg = Non_Instance_Msgs.Table (J).Msg.all
319 and then Non_Instance_Msgs.Table (J).Loc = Orig_Loc
326 -- No duplicate, so error/warning will be posted on instance
328 Warn_On_Instance := Is_Warning_Msg;
331 -- Ignore warning message that is suppressed for this location. Note
332 -- that style checks are not considered warning messages for this
335 if Is_Warning_Msg and then Warnings_Suppressed (Orig_Loc) then
338 -- For style messages, check too many messages so far
341 and then Maximum_Messages /= 0
342 and then Warnings_Detected >= Maximum_Messages
347 -- The idea at this stage is that we have two kinds of messages
349 -- First, we have those messages that are to be placed as requested at
350 -- Flag_Location. This includes messages that have nothing to do with
351 -- generics, and also messages placed on generic templates that reflect
352 -- an error in the template itself. For such messages we simply call
353 -- Error_Msg_Internal to place the message in the requested location.
355 if Instantiation (Sindex) = No_Location then
356 Error_Msg_Internal (Msg, Flag_Location, Flag_Location, False);
360 -- If we are trying to flag an error in an instantiation, we may have
361 -- a generic contract violation. What we generate in this case is:
363 -- instantiation error at ...
364 -- original error message
368 -- warning: in instantiation at
369 -- warning: original warning message
371 -- All these messages are posted at the location of the top level
372 -- instantiation. If there are nested instantiations, then the
373 -- instantiation error message can be repeated, pointing to each
374 -- of the relevant instantiations.
376 -- Note: the instantiation mechanism is also shared for inlining of
377 -- subprogram bodies when front end inlining is done. In this case the
378 -- messages have the form:
380 -- in inlined body at ...
381 -- original error message
385 -- warning: in inlined body at
386 -- warning: original warning message
388 -- OK, here we have an instantiation error, and we need to generate the
389 -- error on the instantiation, rather than on the template.
392 Actual_Error_Loc : Source_Ptr;
393 -- Location of outer level instantiation in instantiation case, or
394 -- just a copy of Flag_Location in the normal case. This is the
395 -- location where all error messages will actually be posted.
397 Save_Error_Msg_Sloc : constant Source_Ptr := Error_Msg_Sloc;
398 -- Save possible location set for caller's message. We need to use
399 -- Error_Msg_Sloc for the location of the instantiation error but we
400 -- have to preserve a possible original value.
402 X : Source_File_Index;
404 Msg_Cont_Status : Boolean;
405 -- Used to label continuation lines in instantiation case with
406 -- proper Msg_Cont status.
409 -- Loop to find highest level instantiation, where all error
410 -- messages will be placed.
414 Actual_Error_Loc := Instantiation (X);
415 X := Get_Source_File_Index (Actual_Error_Loc);
416 exit when Instantiation (X) = No_Location;
419 -- Since we are generating the messages at the instantiation point in
420 -- any case, we do not want the references to the bad lines in the
421 -- instance to be annotated with the location of the instantiation.
423 Suppress_Instance_Location := True;
424 Msg_Cont_Status := False;
426 -- Loop to generate instantiation messages
428 Error_Msg_Sloc := Flag_Location;
429 X := Get_Source_File_Index (Flag_Location);
430 while Instantiation (X) /= No_Location loop
432 -- Suppress instantiation message on continuation lines
434 if Msg (Msg'First) /= '\' then
436 -- Case of inlined body
438 if Inlined_Body (X) then
439 if Is_Warning_Msg or else Is_Style_Msg then
441 ("?in inlined body #",
442 Actual_Error_Loc, Flag_Location, Msg_Cont_Status);
445 ("error in inlined body #",
446 Actual_Error_Loc, Flag_Location, Msg_Cont_Status);
449 -- Case of generic instantiation
452 if Is_Warning_Msg or else Is_Style_Msg then
454 ("?in instantiation #",
455 Actual_Error_Loc, Flag_Location, Msg_Cont_Status);
458 ("instantiation error #",
459 Actual_Error_Loc, Flag_Location, Msg_Cont_Status);
464 Error_Msg_Sloc := Instantiation (X);
465 X := Get_Source_File_Index (Error_Msg_Sloc);
466 Msg_Cont_Status := True;
469 Suppress_Instance_Location := False;
470 Error_Msg_Sloc := Save_Error_Msg_Sloc;
472 -- Here we output the original message on the outer instantiation
475 (Msg, Actual_Error_Loc, Flag_Location, Msg_Cont_Status);
479 --------------------------------
480 -- Error_Msg_Ada_2012_Feature --
481 --------------------------------
483 procedure Error_Msg_Ada_2012_Feature (Feature : String; Loc : Source_Ptr) is
485 if Ada_Version < Ada_2012 then
486 Error_Msg (Feature & " is an Ada 2012 feature", Loc);
488 if No (Ada_Version_Pragma) then
489 Error_Msg ("\unit must be compiled with -gnat2012 switch", Loc);
491 Error_Msg_Sloc := Sloc (Ada_Version_Pragma);
492 Error_Msg ("\incompatible with Ada version set#", Loc);
495 end Error_Msg_Ada_2012_Feature;
501 procedure Error_Msg_AP (Msg : String) is
506 -- If we had saved the Scan_Ptr value after scanning the previous
507 -- token, then we would have exactly the right place for putting
508 -- the flag immediately at hand. However, that would add at least
509 -- two instructions to a Scan call *just* to service the possibility
510 -- of an Error_Msg_AP call. So instead we reconstruct that value.
512 -- We have two possibilities, start with Prev_Token_Ptr and skip over
513 -- the current token, which is made harder by the possibility that this
514 -- token may be in error, or start with Token_Ptr and work backwards.
515 -- We used to take the second approach, but it's hard because of
516 -- comments, and harder still because things that look like comments
517 -- can appear inside strings. So now we take the first approach.
519 -- Note: in the case where there is no previous token, Prev_Token_Ptr
520 -- is set to Source_First, which is a reasonable position for the
521 -- error flag in this situation.
523 S1 := Prev_Token_Ptr;
526 -- If the previous token is a string literal, we need a special approach
527 -- since there may be white space inside the literal and we don't want
528 -- to stop on that white space.
530 -- Note: since this is an error recovery issue anyway, it is not worth
531 -- worrying about special UTF_32 line terminator characters here.
533 if Prev_Token = Tok_String_Literal then
537 if Source (S1) = C then
539 exit when Source (S1) /= C;
540 elsif Source (S1) in Line_Terminator then
545 -- Character literal also needs special handling
547 elsif Prev_Token = Tok_Char_Literal then
550 -- Otherwise we search forward for the end of the current token, marked
551 -- by a line terminator, white space, a comment symbol or if we bump
552 -- into the following token (i.e. the current token).
554 -- Again, it is not worth worrying about UTF_32 special line terminator
555 -- characters in this context, since this is only for error recovery.
558 while Source (S1) not in Line_Terminator
559 and then Source (S1) /= ' '
560 and then Source (S1) /= ASCII.HT
561 and then (Source (S1) /= '-' or else Source (S1 + 1) /= '-')
562 and then S1 /= Token_Ptr
568 -- S1 is now set to the location for the flag
577 procedure Error_Msg_BC (Msg : String) is
579 -- If we are at end of file, post the flag after the previous token
581 if Token = Tok_EOF then
584 -- If we are at start of file, post the flag at the current token
586 elsif Token_Ptr = Source_First (Current_Source_File) then
589 -- If the character before the current token is a space or a horizontal
590 -- tab, then we place the flag on this character (in the case of a tab
591 -- we would really like to place it in the "last" character of the tab
592 -- space, but that it too much trouble to worry about).
594 elsif Source (Token_Ptr - 1) = ' '
595 or else Source (Token_Ptr - 1) = ASCII.HT
597 Error_Msg (Msg, Token_Ptr - 1);
599 -- If there is no space or tab before the current token, then there is
600 -- no room to place the flag before the token, so we place it on the
601 -- token instead (this happens for example at the start of a line).
604 Error_Msg (Msg, Token_Ptr);
612 procedure Error_Msg_CRT (Feature : String; N : Node_Id) is
613 CNRT : constant String := " not allowed in no run time mode";
614 CCRT : constant String := " not supported by configuration>";
616 S : String (1 .. Feature'Length + 1 + CCRT'Length);
621 S (2 .. Feature'Length + 1) := Feature;
622 L := Feature'Length + 2;
624 if No_Run_Time_Mode then
625 S (L .. L + CNRT'Length - 1) := CNRT;
626 L := L + CNRT'Length - 1;
628 else pragma Assert (Configurable_Run_Time_Mode);
629 S (L .. L + CCRT'Length - 1) := CCRT;
630 L := L + CCRT'Length - 1;
633 Error_Msg_N (S (1 .. L), N);
634 Configurable_Run_Time_Violations := Configurable_Run_Time_Violations + 1;
641 procedure Error_Msg_PT (Typ : Node_Id; Subp : Node_Id) is
643 -- Error message below needs rewording (remember comma in -gnatj
647 ("first formal of & must be of mode `OUT`, `IN OUT` or " &
648 "access-to-variable", Typ, Subp);
650 ("\in order to be overridden by protected procedure or entry " &
651 "(RM 9.4(11.9/2))", Typ);
658 procedure Error_Msg_F (Msg : String; N : Node_Id) is
660 Error_Msg_NEL (Msg, N, N, Sloc (First_Node (N)));
667 procedure Error_Msg_FE
670 E : Node_Or_Entity_Id)
673 Error_Msg_NEL (Msg, N, E, Sloc (First_Node (N)));
676 ------------------------
677 -- Error_Msg_Internal --
678 ------------------------
680 procedure Error_Msg_Internal
686 Next_Msg : Error_Msg_Id;
687 -- Pointer to next message at insertion point
689 Prev_Msg : Error_Msg_Id;
690 -- Pointer to previous message at insertion point
692 Temp_Msg : Error_Msg_Id;
694 procedure Handle_Serious_Error;
695 -- Internal procedure to do all error message handling for a serious
696 -- error message, other than bumping the error counts and arranging
697 -- for the message to be output.
699 --------------------------
700 -- Handle_Serious_Error --
701 --------------------------
703 procedure Handle_Serious_Error is
705 -- Turn off code generation if not done already
707 if Operating_Mode = Generate_Code then
708 Operating_Mode := Check_Semantics;
709 Expander_Active := False;
712 -- Set the fatal error flag in the unit table unless we are in
713 -- Try_Semantics mode. This stops the semantics from being performed
714 -- if we find a serious error. This is skipped if we are currently
715 -- dealing with the configuration pragma file.
717 if not Try_Semantics and then Current_Source_Unit /= No_Unit then
718 Set_Fatal_Error (Get_Source_Unit (Sptr));
720 end Handle_Serious_Error;
722 -- Start of processing for Error_Msg_Internal
725 if Raise_Exception_On_Error /= 0 then
726 raise Error_Msg_Exception;
729 Continuation := Msg_Cont;
730 Continuation_New_Line := False;
731 Suppress_Message := False;
732 Kill_Message := False;
733 Set_Msg_Text (Msg, Sptr);
735 -- Kill continuation if parent message killed
737 if Continuation and Last_Killed then
741 -- Return without doing anything if message is suppressed
744 and then not All_Errors_Mode
745 and then not Is_Warning_Msg
746 and then not Is_Unconditional_Msg
748 if not Continuation then
755 -- Return without doing anything if message is killed and this is not
756 -- the first error message. The philosophy is that if we get a weird
757 -- error message and we already have had a message, then we hope the
758 -- weird message is a junk cascaded message
761 and then not All_Errors_Mode
762 and then Total_Errors_Detected /= 0
764 if not Continuation then
771 -- Special check for warning message to see if it should be output
773 if Is_Warning_Msg then
775 -- Immediate return if warning message and warnings are suppressed
777 if Warnings_Suppressed (Optr) or else Warnings_Suppressed (Sptr) then
778 Cur_Msg := No_Error_Msg;
782 -- If the flag location is in the main extended source unit then for
783 -- sure we want the warning since it definitely belongs
785 if In_Extended_Main_Source_Unit (Sptr) then
788 -- If the main unit has not been read yet. the warning must be on
789 -- a configuration file: gnat.adc or user-defined. This means we
790 -- are not parsing the main unit yet, so skip following checks.
792 elsif No (Cunit (Main_Unit)) then
795 -- If the flag location is not in the main extended source unit, then
796 -- we want to eliminate the warning, unless it is in the extended
797 -- main code unit and we want warnings on the instance.
799 elsif In_Extended_Main_Code_Unit (Sptr) and then Warn_On_Instance then
802 -- Keep warning if debug flag G set
804 elsif Debug_Flag_GG then
807 -- Keep warning if message text contains !!
809 elsif Has_Double_Exclam then
812 -- Here is where we delete a warning from a with'ed unit
815 Cur_Msg := No_Error_Msg;
817 if not Continuation then
825 -- If message is to be ignored in special ignore message mode, this is
826 -- where we do this special processing, bypassing message output.
828 if Ignore_Errors_Enable > 0 then
829 if Is_Serious_Error then
830 Handle_Serious_Error;
836 -- If error message line length set, and this is a continuation message
837 -- then all we do is to append the text to the text of the last message
838 -- with a comma space separator (eliminating a possible (style) or
841 if Error_Msg_Line_Length /= 0 and then Continuation then
842 Cur_Msg := Errors.Last;
845 Oldm : String_Ptr := Errors.Table (Cur_Msg).Text;
846 Newm : String (1 .. Oldm'Last + 2 + Msglen);
851 -- First copy old message to new one and free it
853 Newm (Oldm'Range) := Oldm.all;
857 -- Remove (style) or info: at start of message
859 if Msglen > 8 and then Msg_Buffer (1 .. 8) = "(style) " then
862 elsif Msglen > 6 and then Msg_Buffer (1 .. 6) = "info: " then
869 -- Now deal with separation between messages. Normally this is
870 -- simply comma space, but there are some special cases.
872 -- If continuation new line, then put actual NL character in msg
874 if Continuation_New_Line then
876 Newm (Newl) := ASCII.LF;
878 -- If continuation message is enclosed in parentheses, then
879 -- special treatment (don't need a comma, and we want to combine
880 -- successive parenthetical remarks into a single one with
881 -- separating commas).
883 elsif Msg_Buffer (M) = '(' and then Msg_Buffer (Msglen) = ')' then
885 -- Case where existing message ends in right paren, remove
886 -- and separate parenthetical remarks with a comma.
888 if Newm (Newl) = ')' then
890 Msg_Buffer (M) := ' ';
892 -- Case where we are adding new parenthetical comment
899 -- Case where continuation not in parens and no new line
902 Newm (Newl + 1 .. Newl + 2) := ", ";
906 -- Append new message
908 Newm (Newl + 1 .. Newl + Msglen - M + 1) :=
909 Msg_Buffer (M .. Msglen);
910 Newl := Newl + Msglen - M + 1;
911 Errors.Table (Cur_Msg).Text := new String'(Newm (1 .. Newl));
913 -- Update warning msg flag and message doc char if needed
915 if Is_Warning_Msg then
916 if not Errors.Table (Cur_Msg).Warn then
917 Errors.Table (Cur_Msg).Warn := True;
918 Errors.Table (Cur_Msg).Warn_Chr := Warning_Msg_Char;
920 elsif Warning_Msg_Char /= ' ' then
921 Errors.Table (Cur_Msg).Warn_Chr := Warning_Msg_Char;
929 -- Here we build a new error object
932 ((Text => new String'(Msg_Buffer (1 .. Msglen)),
933 Next => No_Error_Msg,
934 Prev => No_Error_Msg,
937 Sfile => Get_Source_File_Index (Sptr),
938 Line => Get_Physical_Line_Number (Sptr),
939 Col => Get_Column_Number (Sptr),
940 Warn => Is_Warning_Msg,
941 Warn_Chr => Warning_Msg_Char,
942 Style => Is_Style_Msg,
943 Serious => Is_Serious_Error,
944 Uncond => Is_Unconditional_Msg,
945 Msg_Cont => Continuation,
947 Cur_Msg := Errors.Last;
949 -- If immediate errors mode set, output error message now. Also output
950 -- now if the -d1 debug flag is set (so node number message comes out
951 -- just before actual error message)
953 if Debug_Flag_OO or else Debug_Flag_1 then
956 (Errors.Table (Cur_Msg).Line, Errors.Table (Cur_Msg).Sfile, True);
958 Output_Error_Msgs (Temp_Msg);
960 -- If not in immediate errors mode, then we insert the message in the
961 -- error chain for later output by Finalize. The messages are sorted
962 -- first by unit (main unit comes first), and within a unit by source
963 -- location (earlier flag location first in the chain).
966 -- First a quick check, does this belong at the very end of the chain
967 -- of error messages. This saves a lot of time in the normal case if
968 -- there are lots of messages.
970 if Last_Error_Msg /= No_Error_Msg
971 and then Errors.Table (Cur_Msg).Sfile =
972 Errors.Table (Last_Error_Msg).Sfile
973 and then (Sptr > Errors.Table (Last_Error_Msg).Sptr
975 (Sptr = Errors.Table (Last_Error_Msg).Sptr
977 Optr > Errors.Table (Last_Error_Msg).Optr))
979 Prev_Msg := Last_Error_Msg;
980 Next_Msg := No_Error_Msg;
982 -- Otherwise do a full sequential search for the insertion point
985 Prev_Msg := No_Error_Msg;
986 Next_Msg := First_Error_Msg;
987 while Next_Msg /= No_Error_Msg loop
989 Errors.Table (Cur_Msg).Sfile < Errors.Table (Next_Msg).Sfile;
991 if Errors.Table (Cur_Msg).Sfile =
992 Errors.Table (Next_Msg).Sfile
994 exit when Sptr < Errors.Table (Next_Msg).Sptr
996 (Sptr = Errors.Table (Next_Msg).Sptr
998 Optr < Errors.Table (Next_Msg).Optr);
1001 Prev_Msg := Next_Msg;
1002 Next_Msg := Errors.Table (Next_Msg).Next;
1006 -- Now we insert the new message in the error chain. The insertion
1007 -- point for the message is after Prev_Msg and before Next_Msg.
1009 -- The possible insertion point for the new message is after Prev_Msg
1010 -- and before Next_Msg. However, this is where we do a special check
1011 -- for redundant parsing messages, defined as messages posted on the
1012 -- same line. The idea here is that probably such messages are junk
1013 -- from the parser recovering. In full errors mode, we don't do this
1014 -- deletion, but otherwise such messages are discarded at this stage.
1016 if Prev_Msg /= No_Error_Msg
1017 and then Errors.Table (Prev_Msg).Line =
1018 Errors.Table (Cur_Msg).Line
1019 and then Errors.Table (Prev_Msg).Sfile =
1020 Errors.Table (Cur_Msg).Sfile
1021 and then Compiler_State = Parsing
1022 and then not All_Errors_Mode
1024 -- Don't delete unconditional messages and at this stage, don't
1025 -- delete continuation lines (we attempted to delete those earlier
1026 -- if the parent message was deleted.
1028 if not Errors.Table (Cur_Msg).Uncond
1029 and then not Continuation
1031 -- Don't delete if prev msg is warning and new msg is an error.
1032 -- This is because we don't want a real error masked by a
1033 -- warning. In all other cases (that is parse errors for the
1034 -- same line that are not unconditional) we do delete the
1035 -- message. This helps to avoid junk extra messages from
1036 -- cascaded parsing errors
1038 if not (Errors.Table (Prev_Msg).Warn
1040 Errors.Table (Prev_Msg).Style)
1042 (Errors.Table (Cur_Msg).Warn
1044 Errors.Table (Cur_Msg).Style)
1046 -- All tests passed, delete the message by simply returning
1047 -- without any further processing.
1049 if not Continuation then
1050 Last_Killed := True;
1058 -- Come here if message is to be inserted in the error chain
1060 if not Continuation then
1061 Last_Killed := False;
1064 if Prev_Msg = No_Error_Msg then
1065 First_Error_Msg := Cur_Msg;
1067 Errors.Table (Prev_Msg).Next := Cur_Msg;
1070 Errors.Table (Cur_Msg).Next := Next_Msg;
1072 if Next_Msg = No_Error_Msg then
1073 Last_Error_Msg := Cur_Msg;
1077 -- Bump appropriate statistics count
1079 if Errors.Table (Cur_Msg).Warn or else Errors.Table (Cur_Msg).Style then
1080 Warnings_Detected := Warnings_Detected + 1;
1083 Total_Errors_Detected := Total_Errors_Detected + 1;
1085 if Errors.Table (Cur_Msg).Serious then
1086 Serious_Errors_Detected := Serious_Errors_Detected + 1;
1087 Handle_Serious_Error;
1091 -- If too many warnings turn off warnings
1093 if Maximum_Messages /= 0 then
1094 if Warnings_Detected = Maximum_Messages then
1095 Warning_Mode := Suppress;
1098 -- If too many errors abandon compilation
1100 if Total_Errors_Detected = Maximum_Messages then
1101 raise Unrecoverable_Error;
1104 end Error_Msg_Internal;
1110 procedure Error_Msg_N (Msg : String; N : Node_Or_Entity_Id) is
1112 Error_Msg_NEL (Msg, N, N, Sloc (N));
1119 procedure Error_Msg_NE
1121 N : Node_Or_Entity_Id;
1122 E : Node_Or_Entity_Id)
1125 Error_Msg_NEL (Msg, N, E, Sloc (N));
1132 procedure Error_Msg_NEL
1134 N : Node_Or_Entity_Id;
1135 E : Node_Or_Entity_Id;
1136 Flag_Location : Source_Ptr)
1139 if Special_Msg_Delete (Msg, N, E) then
1143 Test_Style_Warning_Serious_Unconditional_Msg (Msg);
1145 -- Special handling for warning messages
1147 if Is_Warning_Msg then
1149 -- Suppress if no warnings set for either entity or node
1151 if No_Warnings (N) or else No_Warnings (E) then
1153 -- Disable any continuation messages as well
1155 Last_Killed := True;
1159 -- Suppress if inside loop that is known to be null or is probably
1160 -- null (case where loop executes only if invalid values present).
1161 -- In either case warnings in the loop are likely to be junk.
1168 while Present (P) loop
1169 if Nkind (P) = N_Loop_Statement
1170 and then Suppress_Loop_Warnings (P)
1180 -- Test for message to be output
1183 or else Is_Unconditional_Msg
1184 or else Is_Warning_Msg
1186 or else (Msg (Msg'First) = '\' and then not Last_Killed)
1189 Error_Msg_Node_1 := E;
1190 Error_Msg (Msg, Flag_Location);
1193 Last_Killed := True;
1196 if not (Is_Warning_Msg or Is_Style_Msg) then
1205 procedure Error_Msg_NW
1208 N : Node_Or_Entity_Id)
1212 and then In_Extended_Main_Source_Unit (N)
1213 and then Comes_From_Source (N)
1215 Error_Msg_NEL (Msg, N, N, Sloc (N));
1223 procedure Error_Msg_S (Msg : String) is
1225 Error_Msg (Msg, Scan_Ptr);
1232 procedure Error_Msg_SC (Msg : String) is
1234 -- If we are at end of file, post the flag after the previous token
1236 if Token = Tok_EOF then
1239 -- For all other cases the message is posted at the current token
1243 Error_Msg (Msg, Token_Ptr);
1251 procedure Error_Msg_SP (Msg : String) is
1253 -- Note: in the case where there is no previous token, Prev_Token_Ptr
1254 -- is set to Source_First, which is a reasonable position for the
1255 -- error flag in this situation
1257 Error_Msg (Msg, Prev_Token_Ptr);
1264 procedure Finalize (Last_Call : Boolean) is
1269 procedure Delete_Warning (E : Error_Msg_Id);
1270 -- Delete a message if not already deleted and adjust warning count
1272 --------------------
1273 -- Delete_Warning --
1274 --------------------
1276 procedure Delete_Warning (E : Error_Msg_Id) is
1278 if not Errors.Table (E).Deleted then
1279 Errors.Table (E).Deleted := True;
1280 Warnings_Detected := Warnings_Detected - 1;
1284 -- Start of message for Finalize
1287 -- Set Prev pointers
1289 Cur := First_Error_Msg;
1290 while Cur /= No_Error_Msg loop
1291 Nxt := Errors.Table (Cur).Next;
1292 exit when Nxt = No_Error_Msg;
1293 Errors.Table (Nxt).Prev := Cur;
1297 -- Eliminate any duplicated error messages from the list. This is
1298 -- done after the fact to avoid problems with Change_Error_Text.
1300 Cur := First_Error_Msg;
1301 while Cur /= No_Error_Msg loop
1302 Nxt := Errors.Table (Cur).Next;
1305 while F /= No_Error_Msg
1306 and then Errors.Table (F).Sptr = Errors.Table (Cur).Sptr
1308 Check_Duplicate_Message (Cur, F);
1309 F := Errors.Table (F).Next;
1315 -- Mark any messages suppressed by specific warnings as Deleted
1317 Cur := First_Error_Msg;
1318 while Cur /= No_Error_Msg loop
1320 CE : Error_Msg_Object renames Errors.Table (Cur);
1323 if (CE.Warn and not CE.Deleted)
1325 (Warning_Specifically_Suppressed (CE.Sptr, CE.Text)
1327 Warning_Specifically_Suppressed (CE.Optr, CE.Text))
1329 Delete_Warning (Cur);
1331 -- If this is a continuation, delete previous messages
1334 while Errors.Table (F).Msg_Cont loop
1335 F := Errors.Table (F).Prev;
1339 -- Delete any following continuations
1343 F := Errors.Table (F).Next;
1344 exit when F = No_Error_Msg;
1345 exit when not Errors.Table (F).Msg_Cont;
1351 Cur := Errors.Table (Cur).Next;
1354 Finalize_Called := True;
1356 -- Check consistency of specific warnings (may add warnings). We only
1357 -- do this on the last call, after all possible warnings are posted.
1360 Validate_Specific_Warnings (Error_Msg'Access);
1368 function First_Node (C : Node_Id) return Node_Id is
1369 Orig : constant Node_Id := Original_Node (C);
1370 Loc : constant Source_Ptr := Sloc (Orig);
1371 Sfile : constant Source_File_Index := Get_Source_File_Index (Loc);
1375 function Test_Earlier (N : Node_Id) return Traverse_Result;
1376 -- Function applied to every node in the construct
1378 procedure Search_Tree_First is new Traverse_Proc (Test_Earlier);
1379 -- Create traversal procedure
1385 function Test_Earlier (N : Node_Id) return Traverse_Result is
1386 Norig : constant Node_Id := Original_Node (N);
1387 Loc : constant Source_Ptr := Sloc (Norig);
1390 -- Check for earlier
1394 -- Ignore nodes with no useful location information
1396 and then Loc /= Standard_Location
1397 and then Loc /= No_Location
1399 -- Ignore nodes from a different file. This ensures against cases
1400 -- of strange foreign code somehow being present. We don't want
1401 -- wild placement of messages if that happens.
1403 and then Get_Source_File_Index (Loc) = Sfile
1412 -- Start of processing for First_Node
1415 if Nkind (Orig) in N_Subexpr then
1418 Search_Tree_First (Orig);
1430 function First_Sloc (N : Node_Id) return Source_Ptr is
1431 SI : constant Source_File_Index := Source_Index (Get_Source_Unit (N));
1432 SF : constant Source_Ptr := Source_First (SI);
1437 F := First_Node (N);
1440 -- The following circuit is a bit subtle. When we have parenthesized
1441 -- expressions, then the Sloc will not record the location of the paren,
1442 -- but we would like to post the flag on the paren. So what we do is to
1443 -- crawl up the tree from the First_Node, adjusting the Sloc value for
1444 -- any parentheses we know are present. Yes, we know this circuit is not
1445 -- 100% reliable (e.g. because we don't record all possible paren level
1446 -- values), but this is only for an error message so it is good enough.
1449 Paren_Loop : for J in 1 .. Paren_Count (F) loop
1451 -- We don't look more than 12 characters behind the current
1452 -- location, and in any case not past the front of the source.
1454 Search_Loop : for K in 1 .. 12 loop
1455 exit Search_Loop when S = SF;
1457 if Source_Text (SI) (S - 1) = '(' then
1461 elsif Source_Text (SI) (S - 1) <= ' ' then
1467 end loop Search_Loop;
1468 end loop Paren_Loop;
1470 exit Node_Loop when F = N;
1472 exit Node_Loop when Nkind (F) not in N_Subexpr;
1478 -----------------------
1479 -- Get_Ignore_Errors --
1480 -----------------------
1482 function Get_Ignore_Errors return Boolean is
1484 return Errors_Must_Be_Ignored;
1485 end Get_Ignore_Errors;
1491 procedure Initialize is
1494 First_Error_Msg := No_Error_Msg;
1495 Last_Error_Msg := No_Error_Msg;
1496 Serious_Errors_Detected := 0;
1497 Total_Errors_Detected := 0;
1498 Warnings_Detected := 0;
1499 Cur_Msg := No_Error_Msg;
1502 -- Initialize warnings table
1505 Specific_Warnings.Init;
1512 function No_Warnings (N : Node_Or_Entity_Id) return Boolean is
1514 if Error_Posted (N) then
1517 elsif Nkind (N) in N_Entity and then Has_Warnings_Off (N) then
1520 elsif Is_Entity_Name (N)
1521 and then Present (Entity (N))
1522 and then Has_Warnings_Off (Entity (N))
1535 function OK_Node (N : Node_Id) return Boolean is
1536 K : constant Node_Kind := Nkind (N);
1539 if Error_Posted (N) then
1542 elsif K in N_Has_Etype
1543 and then Present (Etype (N))
1544 and then Error_Posted (Etype (N))
1549 or else K = N_Attribute_Reference
1550 or else K = N_Character_Literal
1551 or else K = N_Expanded_Name
1552 or else K = N_Identifier
1553 or else K = N_Operator_Symbol)
1554 and then Present (Entity (N))
1555 and then Error_Posted (Entity (N))
1563 ---------------------
1564 -- Output_Messages --
1565 ---------------------
1567 procedure Output_Messages is
1571 procedure Write_Error_Summary;
1572 -- Write error summary
1574 procedure Write_Header (Sfile : Source_File_Index);
1575 -- Write header line (compiling or checking given file)
1577 procedure Write_Max_Errors;
1578 -- Write message if max errors reached
1580 -------------------------
1581 -- Write_Error_Summary --
1582 -------------------------
1584 procedure Write_Error_Summary is
1586 -- Extra blank line if error messages or source listing were output
1588 if Total_Errors_Detected + Warnings_Detected > 0
1594 -- Message giving number of lines read and number of errors detected.
1595 -- This normally goes to Standard_Output. The exception is when brief
1596 -- mode is not set, verbose mode (or full list mode) is set, and
1597 -- there are errors. In this case we send the message to standard
1598 -- error to make sure that *something* appears on standard error in
1599 -- an error situation.
1601 -- Formerly, only the "# errors" suffix was sent to stderr, whereas
1602 -- "# lines:" appeared on stdout. This caused problems on VMS when
1603 -- the stdout buffer was flushed, giving an extra line feed after
1606 if Total_Errors_Detected + Warnings_Detected /= 0
1607 and then not Brief_Output
1608 and then (Verbose_Mode or Full_List)
1613 -- Message giving total number of lines. Don't give this message if
1614 -- the Main_Source line is unknown (this happens in error situations,
1615 -- e.g. when integrated preprocessing fails).
1617 if Main_Source_File /= No_Source_File then
1619 Write_Int (Num_Source_Lines (Main_Source_File));
1621 if Num_Source_Lines (Main_Source_File) = 1 then
1622 Write_Str (" line: ");
1624 Write_Str (" lines: ");
1628 if Total_Errors_Detected = 0 then
1629 Write_Str ("No errors");
1631 elsif Total_Errors_Detected = 1 then
1632 Write_Str ("1 error");
1635 Write_Int (Total_Errors_Detected);
1636 Write_Str (" errors");
1639 if Warnings_Detected /= 0 then
1641 Write_Int (Warnings_Detected);
1642 Write_Str (" warning");
1644 if Warnings_Detected /= 1 then
1648 if Warning_Mode = Treat_As_Error then
1649 Write_Str (" (treated as error");
1651 if Warnings_Detected /= 1 then
1660 Set_Standard_Output;
1661 end Write_Error_Summary;
1667 procedure Write_Header (Sfile : Source_File_Index) is
1669 if Verbose_Mode or Full_List then
1670 if Original_Operating_Mode = Generate_Code then
1671 Write_Str ("Compiling: ");
1673 Write_Str ("Checking: ");
1676 Write_Name (Full_File_Name (Sfile));
1678 if not Debug_Flag_7 then
1679 Write_Str (" (source file time stamp: ");
1680 Write_Time_Stamp (Sfile);
1688 ----------------------
1689 -- Write_Max_Errors --
1690 ----------------------
1692 procedure Write_Max_Errors is
1694 if Maximum_Messages /= 0 then
1695 if Warnings_Detected >= Maximum_Messages then
1697 Write_Line ("maximum number of warnings output");
1698 Write_Line ("any further warnings suppressed");
1699 Set_Standard_Output;
1702 -- If too many errors print message
1704 if Total_Errors_Detected >= Maximum_Messages then
1706 Write_Line ("fatal error: maximum number of errors detected");
1707 Set_Standard_Output;
1710 end Write_Max_Errors;
1712 -- Start of processing for Output_Messages
1715 -- Error if Finalize has not been called
1717 if not Finalize_Called then
1718 raise Program_Error;
1721 -- Reset current error source file if the main unit has a pragma
1722 -- Source_Reference. This ensures outputting the proper name of
1723 -- the source file in this situation.
1725 if Main_Source_File = No_Source_File
1726 or else Num_SRef_Pragmas (Main_Source_File) /= 0
1728 Current_Error_Source_File := No_Source_File;
1733 if Brief_Output or (not Full_List and not Verbose_Mode) then
1736 E := First_Error_Msg;
1737 while E /= No_Error_Msg loop
1738 if not Errors.Table (E).Deleted and then not Debug_Flag_KK then
1739 if Full_Path_Name_For_Brief_Errors then
1740 Write_Name (Full_Ref_Name (Errors.Table (E).Sfile));
1742 Write_Name (Reference_Name (Errors.Table (E).Sfile));
1746 Write_Int (Int (Physical_To_Logical
1747 (Errors.Table (E).Line,
1748 Errors.Table (E).Sfile)));
1751 if Errors.Table (E).Col < 10 then
1755 Write_Int (Int (Errors.Table (E).Col));
1757 Output_Msg_Text (E);
1761 E := Errors.Table (E).Next;
1764 Set_Standard_Output;
1767 -- Full source listing case
1770 List_Pragmas_Index := 1;
1771 List_Pragmas_Mode := True;
1772 E := First_Error_Msg;
1774 -- Normal case, to stdout (copyright notice already output)
1776 if Full_List_File_Name = null then
1777 if not Debug_Flag_7 then
1784 Create_List_File_Access.all (Full_List_File_Name.all);
1785 Set_Special_Output (Write_List_Info_Access.all'Access);
1787 -- Write copyright notice to file
1789 if not Debug_Flag_7 then
1790 Write_Str ("GNAT ");
1791 Write_Str (Gnat_Version_String);
1793 Write_Str ("Copyright 1992-" &
1795 ", Free Software Foundation, Inc.");
1800 -- First list extended main source file units with errors
1802 for U in Main_Unit .. Last_Unit loop
1803 if In_Extended_Main_Source_Unit (Cunit_Entity (U))
1805 -- If debug flag d.m is set, only the main source is listed
1807 and then (U = Main_Unit or else not Debug_Flag_Dot_M)
1809 -- If the unit of the entity does not come from source, it is
1810 -- an implicit subprogram declaration for a child subprogram.
1811 -- Do not emit errors for it, they are listed with the body.
1814 (No (Cunit_Entity (U))
1815 or else Comes_From_Source (Cunit_Entity (U))
1816 or else not Is_Subprogram (Cunit_Entity (U)))
1819 Sfile : constant Source_File_Index := Source_Index (U);
1824 -- Only write the header if Sfile is known
1826 if Sfile /= No_Source_File then
1827 Write_Header (Sfile);
1831 -- Normally, we don't want an "error messages from file"
1832 -- message when listing the entire file, so we set the
1833 -- current source file as the current error source file.
1834 -- However, the old style of doing things was to list this
1835 -- message if pragma Source_Reference is present, even for
1836 -- the main unit. Since the purpose of the -gnatd.m switch
1837 -- is to duplicate the old behavior, we skip the reset if
1838 -- this debug flag is set.
1840 if not Debug_Flag_Dot_M then
1841 Current_Error_Source_File := Sfile;
1844 -- Only output the listing if Sfile is known, to avoid
1845 -- crashing the compiler.
1847 if Sfile /= No_Source_File then
1848 for N in 1 .. Last_Source_Line (Sfile) loop
1849 while E /= No_Error_Msg
1850 and then Errors.Table (E).Deleted
1852 E := Errors.Table (E).Next;
1857 and then Errors.Table (E).Line = N
1858 and then Errors.Table (E).Sfile = Sfile;
1860 Output_Source_Line (N, Sfile, Err_Flag);
1863 Output_Error_Msgs (E);
1865 if not Debug_Flag_2 then
1875 -- Then output errors, if any, for subsidiary units not in the
1876 -- main extended unit.
1878 -- Note: if debug flag d.m set, include errors for any units other
1879 -- than the main unit in the extended source unit (e.g. spec and
1880 -- subunits for a body).
1882 while E /= No_Error_Msg
1883 and then (not In_Extended_Main_Source_Unit (Errors.Table (E).Sptr)
1886 and then Get_Source_Unit
1887 (Errors.Table (E).Sptr) /= Main_Unit))
1889 if Errors.Table (E).Deleted then
1890 E := Errors.Table (E).Next;
1895 (Errors.Table (E).Line, Errors.Table (E).Sfile, True);
1896 Output_Error_Msgs (E);
1900 -- If output to file, write extra copy of error summary to the
1901 -- output file, and then close it.
1903 if Full_List_File_Name /= null then
1904 Write_Error_Summary;
1906 Close_List_File_Access.all;
1907 Cancel_Special_Output;
1911 -- Verbose mode (error lines only with error flags). Normally this is
1912 -- ignored in full list mode, unless we are listing to a file, in which
1913 -- case we still generate -gnatv output to standard output.
1916 and then (not Full_List or else Full_List_File_Name /= null)
1920 -- Output the header only when Main_Source_File is known
1922 if Main_Source_File /= No_Source_File then
1923 Write_Header (Main_Source_File);
1926 E := First_Error_Msg;
1928 -- Loop through error lines
1930 while E /= No_Error_Msg loop
1931 if Errors.Table (E).Deleted then
1932 E := Errors.Table (E).Next;
1936 (Errors.Table (E).Line, Errors.Table (E).Sfile, True);
1937 Output_Error_Msgs (E);
1942 -- Output error summary if verbose or full list mode
1944 if Verbose_Mode or else Full_List then
1945 Write_Error_Summary;
1950 if Warning_Mode = Treat_As_Error then
1951 Total_Errors_Detected := Total_Errors_Detected + Warnings_Detected;
1952 Warnings_Detected := 0;
1954 end Output_Messages;
1956 ------------------------
1957 -- Output_Source_Line --
1958 ------------------------
1960 procedure Output_Source_Line
1961 (L : Physical_Line_Number;
1962 Sfile : Source_File_Index;
1968 Line_Number_Output : Boolean := False;
1969 -- Set True once line number is output
1971 Empty_Line : Boolean := True;
1972 -- Set False if line includes at least one character
1975 if Sfile /= Current_Error_Source_File then
1976 Write_Str ("==============Error messages for ");
1978 case Sinput.File_Type (Sfile) is
1980 Write_Str ("source");
1982 when Sinput.Config =>
1983 Write_Str ("configuration pragmas");
1986 Write_Str ("symbol definition");
1988 when Sinput.Preproc =>
1989 Write_Str ("preprocessing data");
1992 Write_Str (" file: ");
1993 Write_Name (Full_File_Name (Sfile));
1996 if Num_SRef_Pragmas (Sfile) > 0 then
1997 Write_Str ("--------------Line numbers from file: ");
1998 Write_Name (Full_Ref_Name (Sfile));
1999 Write_Str (" (starting at line ");
2000 Write_Int (Int (First_Mapped_Line (Sfile)));
2005 Current_Error_Source_File := Sfile;
2008 if Errs or List_Pragmas_Mode then
2009 Output_Line_Number (Physical_To_Logical (L, Sfile));
2010 Line_Number_Output := True;
2013 S := Line_Start (L, Sfile);
2016 C := Source_Text (Sfile) (S);
2017 exit when C = ASCII.LF or else C = ASCII.CR or else C = EOF;
2019 -- Deal with matching entry in List_Pragmas table
2022 and then List_Pragmas_Index <= List_Pragmas.Last
2023 and then S = List_Pragmas.Table (List_Pragmas_Index).Ploc
2025 case List_Pragmas.Table (List_Pragmas_Index).Ptyp is
2029 -- Ignore if on line with errors so that error flags
2030 -- get properly listed with the error line .
2033 Write_Char (ASCII.FF);
2037 List_Pragmas_Mode := True;
2039 if not Line_Number_Output then
2040 Output_Line_Number (Physical_To_Logical (L, Sfile));
2041 Line_Number_Output := True;
2048 List_Pragmas_Mode := False;
2051 List_Pragmas_Index := List_Pragmas_Index + 1;
2053 -- Normal case (no matching entry in List_Pragmas table)
2056 if Errs or List_Pragmas_Mode then
2061 Empty_Line := False;
2065 -- If we have output a source line, then add the line terminator, with
2066 -- training spaces preserved (so we output the line exactly as input).
2068 if Line_Number_Output then
2072 Write_Eol_Keep_Blanks;
2075 end Output_Source_Line;
2077 -----------------------------
2078 -- Remove_Warning_Messages --
2079 -----------------------------
2081 procedure Remove_Warning_Messages (N : Node_Id) is
2083 function Check_For_Warning (N : Node_Id) return Traverse_Result;
2084 -- This function checks one node for a possible warning message
2086 function Check_All_Warnings is new Traverse_Func (Check_For_Warning);
2087 -- This defines the traversal operation
2089 -----------------------
2090 -- Check_For_Warning --
2091 -----------------------
2093 function Check_For_Warning (N : Node_Id) return Traverse_Result is
2094 Loc : constant Source_Ptr := Sloc (N);
2097 function To_Be_Removed (E : Error_Msg_Id) return Boolean;
2098 -- Returns True for a message that is to be removed. Also adjusts
2099 -- warning count appropriately.
2105 function To_Be_Removed (E : Error_Msg_Id) return Boolean is
2107 if E /= No_Error_Msg
2109 -- Don't remove if location does not match
2111 and then Errors.Table (E).Optr = Loc
2113 -- Don't remove if not warning/info message. Note that we do
2114 -- not remove style messages here. They are warning messages
2115 -- but not ones we want removed in this context.
2117 and then Errors.Table (E).Warn
2119 -- Don't remove unconditional messages
2121 and then not Errors.Table (E).Uncond
2123 Warnings_Detected := Warnings_Detected - 1;
2126 -- No removal required
2133 -- Start of processing for Check_For_Warnings
2136 while To_Be_Removed (First_Error_Msg) loop
2137 First_Error_Msg := Errors.Table (First_Error_Msg).Next;
2140 if First_Error_Msg = No_Error_Msg then
2141 Last_Error_Msg := No_Error_Msg;
2144 E := First_Error_Msg;
2145 while E /= No_Error_Msg loop
2146 while To_Be_Removed (Errors.Table (E).Next) loop
2147 Errors.Table (E).Next :=
2148 Errors.Table (Errors.Table (E).Next).Next;
2150 if Errors.Table (E).Next = No_Error_Msg then
2151 Last_Error_Msg := E;
2155 E := Errors.Table (E).Next;
2158 if Nkind (N) = N_Raise_Constraint_Error
2159 and then Original_Node (N) /= N
2160 and then No (Condition (N))
2162 -- Warnings may have been posted on subexpressions of the original
2163 -- tree. We place the original node back on the tree to remove
2164 -- those warnings, whose sloc do not match those of any node in
2165 -- the current tree. Given that we are in unreachable code, this
2166 -- modification to the tree is harmless.
2169 Status : Traverse_Final_Result;
2172 if Is_List_Member (N) then
2173 Set_Condition (N, Original_Node (N));
2174 Status := Check_All_Warnings (Condition (N));
2176 Rewrite (N, Original_Node (N));
2177 Status := Check_All_Warnings (N);
2186 end Check_For_Warning;
2188 -- Start of processing for Remove_Warning_Messages
2191 if Warnings_Detected /= 0 then
2193 Discard : Traverse_Final_Result;
2194 pragma Warnings (Off, Discard);
2197 Discard := Check_All_Warnings (N);
2200 end Remove_Warning_Messages;
2202 procedure Remove_Warning_Messages (L : List_Id) is
2205 if Is_Non_Empty_List (L) then
2207 while Present (Stat) loop
2208 Remove_Warning_Messages (Stat);
2212 end Remove_Warning_Messages;
2214 ---------------------------
2215 -- Set_Identifier_Casing --
2216 ---------------------------
2218 procedure Set_Identifier_Casing
2219 (Identifier_Name : System.Address;
2220 File_Name : System.Address)
2222 Ident : constant Big_String_Ptr := To_Big_String_Ptr (Identifier_Name);
2223 File : constant Big_String_Ptr := To_Big_String_Ptr (File_Name);
2226 Desired_Case : Casing_Type := Mixed_Case;
2227 -- Casing required for result. Default value of Mixed_Case is used if
2228 -- for some reason we cannot find the right file name in the table.
2231 -- Get length of file name
2234 while File (Flen + 1) /= ASCII.NUL loop
2238 -- Loop through file names to find matching one. This is a bit slow, but
2239 -- we only do it in error situations so it is not so terrible. Note that
2240 -- if the loop does not exit, then the desired case will be left set to
2241 -- Mixed_Case, this can happen if the name was not in canonical form,
2242 -- and gets canonicalized on VMS. Possibly we could fix this by
2243 -- unconditionally canonicalizing these names ???
2245 for J in 1 .. Last_Source_File loop
2246 Get_Name_String (Full_Debug_Name (J));
2249 and then Name_Buffer (1 .. Name_Len) = String (File (1 .. Flen))
2251 Desired_Case := Identifier_Casing (J);
2256 -- Copy identifier as given to Name_Buffer
2258 for J in Name_Buffer'Range loop
2259 Name_Buffer (J) := Ident (J);
2261 if Name_Buffer (J) = ASCII.NUL then
2267 Set_Casing (Desired_Case);
2268 end Set_Identifier_Casing;
2270 -----------------------
2271 -- Set_Ignore_Errors --
2272 -----------------------
2274 procedure Set_Ignore_Errors (To : Boolean) is
2276 Errors_Must_Be_Ignored := To;
2277 end Set_Ignore_Errors;
2279 ------------------------------
2280 -- Set_Msg_Insertion_Column --
2281 ------------------------------
2283 procedure Set_Msg_Insertion_Column is
2285 if RM_Column_Check then
2286 Set_Msg_Str (" in column ");
2287 Set_Msg_Int (Int (Error_Msg_Col) + 1);
2289 end Set_Msg_Insertion_Column;
2291 ----------------------------
2292 -- Set_Msg_Insertion_Node --
2293 ----------------------------
2295 procedure Set_Msg_Insertion_Node is
2300 Error_Msg_Node_1 = Error
2301 or else Error_Msg_Node_1 = Any_Type;
2303 if Error_Msg_Node_1 = Empty then
2304 Set_Msg_Blank_Conditional;
2305 Set_Msg_Str ("<empty>");
2307 elsif Error_Msg_Node_1 = Error then
2309 Set_Msg_Str ("<error>");
2311 elsif Error_Msg_Node_1 = Standard_Void_Type then
2313 Set_Msg_Str ("procedure name");
2316 Set_Msg_Blank_Conditional;
2320 K := Nkind (Error_Msg_Node_1);
2322 -- If we have operator case, skip quotes since name of operator
2323 -- itself will supply the required quotations. An operator can be an
2324 -- applied use in an expression or an explicit operator symbol, or an
2325 -- identifier whose name indicates it is an operator.
2328 or else K = N_Operator_Symbol
2329 or else K = N_Defining_Operator_Symbol
2330 or else ((K = N_Identifier or else K = N_Defining_Identifier)
2331 and then Is_Operator_Name (Chars (Error_Msg_Node_1)))
2333 Set_Msg_Node (Error_Msg_Node_1);
2335 -- Normal case, not an operator, surround with quotes
2339 Set_Qualification (Error_Msg_Qual_Level, Error_Msg_Node_1);
2340 Set_Msg_Node (Error_Msg_Node_1);
2345 -- The following assignment ensures that a second ampersand insertion
2346 -- character will correspond to the Error_Msg_Node_2 parameter. We
2347 -- suppress possible validity checks in case operating in -gnatVa mode,
2348 -- and Error_Msg_Node_2 is not needed and has not been set.
2351 pragma Suppress (Range_Check);
2353 Error_Msg_Node_1 := Error_Msg_Node_2;
2355 end Set_Msg_Insertion_Node;
2357 --------------------------------------
2358 -- Set_Msg_Insertion_Type_Reference --
2359 --------------------------------------
2361 procedure Set_Msg_Insertion_Type_Reference (Flag : Source_Ptr) is
2367 if Error_Msg_Node_1 = Standard_Void_Type then
2368 Set_Msg_Str ("package or procedure name");
2371 elsif Error_Msg_Node_1 = Standard_Exception_Type then
2372 Set_Msg_Str ("exception name");
2375 elsif Error_Msg_Node_1 = Any_Access
2376 or else Error_Msg_Node_1 = Any_Array
2377 or else Error_Msg_Node_1 = Any_Boolean
2378 or else Error_Msg_Node_1 = Any_Character
2379 or else Error_Msg_Node_1 = Any_Composite
2380 or else Error_Msg_Node_1 = Any_Discrete
2381 or else Error_Msg_Node_1 = Any_Fixed
2382 or else Error_Msg_Node_1 = Any_Integer
2383 or else Error_Msg_Node_1 = Any_Modular
2384 or else Error_Msg_Node_1 = Any_Numeric
2385 or else Error_Msg_Node_1 = Any_Real
2386 or else Error_Msg_Node_1 = Any_Scalar
2387 or else Error_Msg_Node_1 = Any_String
2389 Get_Unqualified_Decoded_Name_String (Chars (Error_Msg_Node_1));
2390 Set_Msg_Name_Buffer;
2393 elsif Error_Msg_Node_1 = Universal_Real then
2394 Set_Msg_Str ("type universal real");
2397 elsif Error_Msg_Node_1 = Universal_Integer then
2398 Set_Msg_Str ("type universal integer");
2401 elsif Error_Msg_Node_1 = Universal_Fixed then
2402 Set_Msg_Str ("type universal fixed");
2406 -- Special case of anonymous array
2408 if Nkind (Error_Msg_Node_1) in N_Entity
2409 and then Is_Array_Type (Error_Msg_Node_1)
2410 and then Present (Related_Array_Object (Error_Msg_Node_1))
2412 Set_Msg_Str ("type of ");
2413 Set_Msg_Node (Related_Array_Object (Error_Msg_Node_1));
2414 Set_Msg_Str (" declared");
2415 Set_Msg_Insertion_Line_Number
2416 (Sloc (Related_Array_Object (Error_Msg_Node_1)), Flag);
2420 -- If we fall through, it is not a special case, so first output
2421 -- the name of the type, preceded by private for a private type
2423 if Is_Private_Type (Error_Msg_Node_1) then
2424 Set_Msg_Str ("private type ");
2426 Set_Msg_Str ("type ");
2429 Ent := Error_Msg_Node_1;
2431 if Is_Internal_Name (Chars (Ent)) then
2432 Unwind_Internal_Type (Ent);
2435 -- Types in Standard are displayed as "Standard.name"
2437 if Sloc (Ent) <= Standard_Location then
2439 Set_Msg_Str ("Standard.");
2444 -- Types in other language defined units are displayed as
2445 -- "package-name.type-name"
2448 Is_Predefined_File_Name (Unit_File_Name (Get_Source_Unit (Ent)))
2450 Get_Unqualified_Decoded_Name_String
2451 (Unit_Name (Get_Source_Unit (Ent)));
2452 Name_Len := Name_Len - 2;
2454 Set_Casing (Mixed_Case);
2455 Set_Msg_Name_Buffer;
2457 Set_Casing (Mixed_Case);
2462 -- All other types display as "type name" defined at line xxx
2463 -- possibly qualified if qualification is requested.
2467 Set_Qualification (Error_Msg_Qual_Level, Ent);
2471 -- If Ent is an anonymous subprogram type, there is no name to print,
2472 -- so remove enclosing quotes.
2474 if Buffer_Ends_With ("""") then
2475 Buffer_Remove ("""");
2481 -- If the original type did not come from a predefined file, add the
2482 -- location where the type was defined.
2484 if Sloc (Error_Msg_Node_1) > Standard_Location
2486 not Is_Predefined_File_Name
2487 (Unit_File_Name (Get_Source_Unit (Error_Msg_Node_1)))
2489 Set_Msg_Str (" defined");
2490 Set_Msg_Insertion_Line_Number (Sloc (Error_Msg_Node_1), Flag);
2492 -- If it did come from a predefined file, deal with the case where
2493 -- this was a file with a generic instantiation from elsewhere.
2496 if Sloc (Error_Msg_Node_1) > Standard_Location then
2498 Iloc : constant Source_Ptr :=
2499 Instantiation_Location (Sloc (Error_Msg_Node_1));
2502 if Iloc /= No_Location
2503 and then not Suppress_Instance_Location
2505 Set_Msg_Str (" from instance");
2506 Set_Msg_Insertion_Line_Number (Iloc, Flag);
2511 end Set_Msg_Insertion_Type_Reference;
2513 ---------------------------------
2514 -- Set_Msg_Insertion_Unit_Name --
2515 ---------------------------------
2517 procedure Set_Msg_Insertion_Unit_Name (Suffix : Boolean := True) is
2519 if Error_Msg_Unit_1 = No_Unit_Name then
2522 elsif Error_Msg_Unit_1 = Error_Unit_Name then
2524 Set_Msg_Str ("<error>");
2527 Get_Unit_Name_String (Error_Msg_Unit_1, Suffix);
2530 Set_Msg_Name_Buffer;
2534 -- The following assignment ensures that a second percent insertion
2535 -- character will correspond to the Error_Msg_Unit_2 parameter. We
2536 -- suppress possible validity checks in case operating in -gnatVa mode,
2537 -- and Error_Msg_Unit_2 is not needed and has not been set.
2540 pragma Suppress (Range_Check);
2542 Error_Msg_Unit_1 := Error_Msg_Unit_2;
2544 end Set_Msg_Insertion_Unit_Name;
2550 procedure Set_Msg_Node (Node : Node_Id) is
2555 case Nkind (Node) is
2556 when N_Designator =>
2557 Set_Msg_Node (Name (Node));
2559 Set_Msg_Node (Identifier (Node));
2562 when N_Defining_Program_Unit_Name =>
2563 Set_Msg_Node (Name (Node));
2565 Set_Msg_Node (Defining_Identifier (Node));
2568 when N_Selected_Component | N_Expanded_Name =>
2569 Set_Msg_Node (Prefix (Node));
2571 Set_Msg_Node (Selector_Name (Node));
2578 -- The only remaining possibilities are identifiers, defining
2579 -- identifiers, pragmas, and pragma argument associations.
2581 if Nkind (Node) = N_Pragma then
2582 Nam := Pragma_Name (Node);
2584 -- The other cases have Chars fields, and we want to test for possible
2585 -- internal names, which generally represent something gone wrong. An
2586 -- exception is the case of internal type names, where we try to find a
2587 -- reasonable external representation for the external name
2589 elsif Is_Internal_Name (Chars (Node))
2591 ((Is_Entity_Name (Node)
2592 and then Present (Entity (Node))
2593 and then Is_Type (Entity (Node)))
2595 (Nkind (Node) = N_Defining_Identifier and then Is_Type (Node)))
2597 if Nkind (Node) = N_Identifier then
2598 Ent := Entity (Node);
2603 -- If the type is the designated type of an access_to_subprogram,
2604 -- there is no name to provide in the call.
2606 if Ekind (Ent) = E_Subprogram_Type then
2609 Unwind_Internal_Type (Ent);
2613 -- If not internal name, just use name in Chars field
2616 Nam := Chars (Node);
2619 -- At this stage, the name to output is in Nam
2621 Get_Unqualified_Decoded_Name_String (Nam);
2623 -- Remove trailing upper case letters from the name (useful for
2624 -- dealing with some cases of internal names.
2626 while Name_Len > 1 and then Name_Buffer (Name_Len) in 'A' .. 'Z' loop
2627 Name_Len := Name_Len - 1;
2630 -- If we have any of the names from standard that start with the
2631 -- characters "any " (e.g. Any_Type), then kill the message since
2632 -- almost certainly it is a junk cascaded message.
2635 and then Name_Buffer (1 .. 4) = "any "
2637 Kill_Message := True;
2640 -- Now we have to set the proper case. If we have a source location
2641 -- then do a check to see if the name in the source is the same name
2642 -- as the name in the Names table, except for possible differences
2643 -- in case, which is the case when we can copy from the source.
2646 Src_Loc : constant Source_Ptr := Sloc (Node);
2647 Sbuffer : Source_Buffer_Ptr;
2649 Src_Ptr : Source_Ptr;
2655 -- For standard locations, always use mixed case
2657 if Src_Loc <= No_Location
2658 or else Sloc (Node) <= No_Location
2660 Set_Casing (Mixed_Case);
2663 -- Determine if the reference we are dealing with corresponds to
2664 -- text at the point of the error reference. This will often be
2665 -- the case for simple identifier references, and is the case
2666 -- where we can copy the spelling from the source.
2668 Sbuffer := Source_Text (Get_Source_File_Index (Src_Loc));
2670 while Ref_Ptr <= Name_Len loop
2672 Fold_Lower (Sbuffer (Src_Ptr)) /=
2673 Fold_Lower (Name_Buffer (Ref_Ptr));
2674 Ref_Ptr := Ref_Ptr + 1;
2675 Src_Ptr := Src_Ptr + 1;
2678 -- If we get through the loop without a mismatch, then output the
2679 -- name the way it is spelled in the source program
2681 if Ref_Ptr > Name_Len then
2684 for J in 1 .. Name_Len loop
2685 Name_Buffer (J) := Sbuffer (Src_Ptr);
2686 Src_Ptr := Src_Ptr + 1;
2689 -- Otherwise set the casing using the default identifier casing
2692 Set_Casing (Identifier_Casing (Flag_Source), Mixed_Case);
2697 Set_Msg_Name_Buffer;
2705 procedure Set_Msg_Text (Text : String; Flag : Source_Ptr) is
2706 C : Character; -- Current character
2707 P : Natural; -- Current index;
2709 procedure Set_Msg_Insertion_Warning (C : Character);
2710 -- Deal with ? ?? ?x? ?X? insertion sequences (also < << <x< <X<). The
2711 -- caller has already bumped the pointer past the initial ? or < and C
2712 -- is set to this initial character (? or <).
2714 -------------------------------
2715 -- Set_Msg_Insertion_Warning --
2716 -------------------------------
2718 procedure Set_Msg_Insertion_Warning (C : Character) is
2720 Warning_Msg_Char := ' ';
2722 if P <= Text'Last and then Text (P) = C then
2723 if Warning_Doc_Switch then
2724 Warning_Msg_Char := '?';
2729 elsif P + 1 <= Text'Last
2730 and then (Text (P) in 'a' .. 'z'
2732 Text (P) in 'A' .. 'Z')
2733 and then Text (P + 1) = C
2735 if Warning_Doc_Switch then
2736 Warning_Msg_Char := Text (P);
2741 end Set_Msg_Insertion_Warning;
2743 -- Start of processing for Set_Msg_Text
2746 Manual_Quote_Mode := False;
2748 Flag_Source := Get_Source_File_Index (Flag);
2751 while P <= Text'Last loop
2755 -- Check for insertion character or sequence
2759 if P <= Text'Last and then Text (P) = '%' then
2761 Set_Msg_Insertion_Name_Literal;
2763 Set_Msg_Insertion_Name;
2767 if P <= Text'Last and then Text (P) = '$' then
2769 Set_Msg_Insertion_Unit_Name (Suffix => False);
2771 Set_Msg_Insertion_Unit_Name;
2775 Set_Msg_Insertion_File_Name;
2778 Set_Msg_Insertion_Type_Reference (Flag);
2781 Set_Msg_Insertion_Reserved_Name;
2784 Set_Msg_Insertion_Node;
2787 Set_Msg_Insertion_Line_Number (Error_Msg_Sloc, Flag);
2790 Continuation := True;
2792 if Text (P) = '\' then
2793 Continuation_New_Line := True;
2798 Set_Msg_Insertion_Column;
2801 Set_Msg_Insertion_Run_Time_Name;
2804 Set_Msg_Insertion_Uint;
2807 Manual_Quote_Mode := not Manual_Quote_Mode;
2811 null; -- already dealt with
2814 Set_Msg_Insertion_Warning ('?');
2818 -- Note: the prescan already set Is_Warning_Msg True if and
2819 -- only if Error_Msg_Warn is set to True. If Error_Msg_Warn
2820 -- is False, the call to Set_Msg_Insertion_Warning here does
2821 -- no harm, since Warning_Msg_Char is ignored in that case.
2823 Set_Msg_Insertion_Warning ('<');
2826 null; -- already dealt with
2829 Set_Msg_Char (Text (P));
2833 Set_Msg_Str (Error_Msg_String (1 .. Error_Msg_Strlen));
2835 -- Upper case letter
2839 -- Start of reserved word if two or more
2841 if P <= Text'Last and then Text (P) in 'A' .. 'Z' then
2843 Set_Msg_Insertion_Reserved_Word (Text, P);
2845 -- Single upper case letter is just inserted
2851 -- '[' (will be/would have been raised at run time)
2854 if Is_Warning_Msg then
2855 Set_Msg_Str ("will be raised at run time");
2857 Set_Msg_Str ("would have been raised at run time");
2860 -- ']' (may be/might have been raised at run time)
2863 if Is_Warning_Msg then
2864 Set_Msg_Str ("may be raised at run time");
2866 Set_Msg_Str ("might have been raised at run time");
2869 -- Normal character with no special treatment
2883 procedure Set_Posted (N : Node_Id) is
2887 if Is_Serious_Error then
2889 -- We always set Error_Posted on the node itself
2891 Set_Error_Posted (N);
2893 -- If it is a subexpression, then set Error_Posted on parents up to
2894 -- and including the first non-subexpression construct. This helps
2895 -- avoid cascaded error messages within a single expression.
2901 Set_Error_Posted (P);
2902 exit when Nkind (P) not in N_Subexpr;
2905 -- A special check, if we just posted an error on an attribute
2906 -- definition clause, then also set the entity involved as posted.
2907 -- For example, this stops complaining about the alignment after
2908 -- complaining about the size, which is likely to be useless.
2910 if Nkind (P) = N_Attribute_Definition_Clause then
2911 if Is_Entity_Name (Name (P)) then
2912 Set_Error_Posted (Entity (Name (P)));
2918 -----------------------
2919 -- Set_Qualification --
2920 -----------------------
2922 procedure Set_Qualification (N : Nat; E : Entity_Id) is
2924 if N /= 0 and then Scope (E) /= Standard_Standard then
2925 Set_Qualification (N - 1, Scope (E));
2926 Set_Msg_Node (Scope (E));
2929 end Set_Qualification;
2931 ------------------------
2932 -- Special_Msg_Delete --
2933 ------------------------
2935 -- Is it really right to have all this specialized knowledge in errout?
2937 function Special_Msg_Delete
2939 N : Node_Or_Entity_Id;
2940 E : Node_Or_Entity_Id) return Boolean
2943 -- Never delete messages in -gnatdO mode
2945 if Debug_Flag_OO then
2948 -- Processing for "atomic access cannot be guaranteed"
2950 elsif Msg = "atomic access to & cannot be guaranteed" then
2952 -- When an atomic object refers to a non-atomic type in the same
2953 -- scope, we implicitly make the type atomic. In the non-error case
2954 -- this is surely safe (and in fact prevents an error from occurring
2955 -- if the type is not atomic by default). But if the object cannot be
2956 -- made atomic, then we introduce an extra junk message by this
2957 -- manipulation, which we get rid of here.
2959 -- We identify this case by the fact that it references a type for
2960 -- which Is_Atomic is set, but there is no Atomic pragma setting it.
2963 and then Is_Atomic (E)
2964 and then No (Get_Rep_Pragma (E, Name_Atomic))
2969 -- Processing for "Size too small" messages
2971 elsif Msg = "size for& too small, minimum allowed is ^" then
2973 -- Suppress "size too small" errors in CodePeer mode, since code may
2974 -- be analyzed in a different configuration than the one used for
2975 -- compilation. Even when the configurations match, this message
2976 -- may be issued on correct code, because pragma Pack is ignored
2977 -- in CodePeer mode.
2979 if CodePeer_Mode then
2982 -- When a size is wrong for a frozen type there is no explicit size
2983 -- clause, and other errors have occurred, suppress the message,
2984 -- since it is likely that this size error is a cascaded result of
2985 -- other errors. The reason we eliminate unfrozen types is that
2986 -- messages issued before the freeze type are for sure OK.
2989 and then Serious_Errors_Detected > 0
2990 and then Nkind (N) /= N_Component_Clause
2991 and then Nkind (Parent (N)) /= N_Component_Clause
2993 No (Get_Attribute_Definition_Clause (E, Attribute_Size))
2995 No (Get_Attribute_Definition_Clause (E, Attribute_Object_Size))
2997 No (Get_Attribute_Definition_Clause (E, Attribute_Value_Size))
3003 -- All special tests complete, so go ahead with message
3006 end Special_Msg_Delete;
3008 --------------------------
3009 -- Unwind_Internal_Type --
3010 --------------------------
3012 procedure Unwind_Internal_Type (Ent : in out Entity_Id) is
3013 Derived : Boolean := False;
3015 Old_Ent : Entity_Id;
3018 -- Undo placement of a quote, since we will put it back later
3020 Mchar := Msg_Buffer (Msglen);
3023 Msglen := Msglen - 1;
3026 -- The loop here deals with recursive types, we are trying to find a
3027 -- related entity that is not an implicit type. Note that the check with
3028 -- Old_Ent stops us from getting "stuck". Also, we don't output the
3029 -- "type derived from" message more than once in the case where we climb
3030 -- up multiple levels.
3035 -- Implicit access type, use directly designated type In Ada 2005,
3036 -- the designated type may be an anonymous access to subprogram, in
3037 -- which case we can only point to its definition.
3039 if Is_Access_Type (Ent) then
3040 if Ekind (Ent) = E_Access_Subprogram_Type
3041 or else Ekind (Ent) = E_Anonymous_Access_Subprogram_Type
3042 or else Is_Access_Protected_Subprogram_Type (Ent)
3044 Ent := Directly_Designated_Type (Ent);
3046 if not Comes_From_Source (Ent) then
3047 if Buffer_Ends_With ("type ") then
3048 Buffer_Remove ("type ");
3051 if Is_Itype (Ent) then
3053 Assoc : constant Node_Id :=
3054 Associated_Node_For_Itype (Ent);
3057 if Nkind (Assoc) in N_Subprogram_Specification then
3059 -- Anonymous access to subprogram in a signature.
3060 -- Indicate the enclosing subprogram.
3064 (Associated_Node_For_Itype (Ent));
3066 ("access to subprogram declared in profile of ");
3069 Set_Msg_Str ("access to subprogram with profile ");
3074 elsif Ekind (Ent) = E_Function then
3075 Set_Msg_Str ("access to function ");
3077 Set_Msg_Str ("access to procedure ");
3082 -- Type is access to object, named or anonymous
3085 Set_Msg_Str ("access to ");
3086 Ent := Directly_Designated_Type (Ent);
3091 elsif Is_Class_Wide_Type (Ent) then
3093 Ent := Root_Type (Ent);
3095 -- Use base type if this is a subtype
3097 elsif Ent /= Base_Type (Ent) then
3098 Buffer_Remove ("type ");
3100 -- Avoid duplication "subtype of subtype of", and also replace
3101 -- "derived from subtype of" simply by "derived from"
3103 if not Buffer_Ends_With ("subtype of ")
3104 and then not Buffer_Ends_With ("derived from ")
3106 Set_Msg_Str ("subtype of ");
3109 Ent := Base_Type (Ent);
3111 -- If this is a base type with a first named subtype, use the first
3112 -- named subtype instead. This is not quite accurate in all cases,
3113 -- but it makes too much noise to be accurate and add 'Base in all
3114 -- cases. Note that we only do this is the first named subtype is not
3115 -- itself an internal name. This avoids the obvious loop (subtype ->
3116 -- basetype -> subtype) which would otherwise occur!)
3120 FST : constant Entity_Id := First_Subtype (Ent);
3123 if not Is_Internal_Name (Chars (FST)) then
3127 -- Otherwise use root type
3131 Buffer_Remove ("type ");
3133 -- Test for "subtype of type derived from" which seems
3134 -- excessive and is replaced by "type derived from".
3136 Buffer_Remove ("subtype of");
3138 -- Avoid duplicated "type derived from type derived from"
3140 if not Buffer_Ends_With ("type derived from ") then
3141 Set_Msg_Str ("type derived from ");
3152 -- If we are stuck in a loop, get out and settle for the internal
3153 -- name after all. In this case we set to kill the message if it is
3154 -- not the first error message (we really try hard not to show the
3155 -- dirty laundry of the implementation to the poor user!)
3157 if Ent = Old_Ent then
3158 Kill_Message := True;
3162 -- Get out if we finally found a non-internal name to use
3164 exit Find when not Is_Internal_Name (Chars (Ent));
3170 end Unwind_Internal_Type;
3176 procedure VMS_Convert is
3186 P := Msg_Buffer'First;
3192 if Msg_Buffer (P) = '-' then
3193 for G in Gnames'Range loop
3194 L := Gnames (G)'Length;
3196 -- See if we have "-ggg switch", where ggg is Gnames entry
3198 if P + L + 7 <= Msglen
3199 and then Msg_Buffer (P + 1 .. P + L) = Gnames (G).all
3200 and then Msg_Buffer (P + L + 1 .. P + L + 7) = " switch"
3202 -- Replace by "/vvv qualifier", where vvv is Vnames entry
3204 N := Vnames (G)'Length;
3205 Msg_Buffer (P + N + 11 .. Msglen + N - L + 3) :=
3206 Msg_Buffer (P + L + 8 .. Msglen);
3207 Msg_Buffer (P) := '/';
3208 Msg_Buffer (P + 1 .. P + N) := Vnames (G).all;
3209 Msg_Buffer (P + N + 1 .. P + N + 10) := " qualifier";
3211 Msglen := Msglen + N - L + 3;