1 ------------------------------------------------------------------------------
3 -- GNAT COMPILER COMPONENTS --
9 -- Copyright (C) 1992-2006, 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 2, 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 COPYING. If not, write --
19 -- to the Free Software Foundation, 51 Franklin Street, Fifth Floor, --
20 -- Boston, MA 02110-1301, USA. --
22 -- GNAT was originally developed by the GNAT team at New York University. --
23 -- Extensive contributions were provided by Ada Core Technologies Inc. --
25 ------------------------------------------------------------------------------
27 -- Warning! Error messages can be generated during Gigi processing by direct
28 -- calls to error message routines, so it is essential that the processing
29 -- in this body be consistent with the requirements for the Gigi processing
30 -- environment, and that in particular, no disallowed table expansion is
33 with Atree; use Atree;
34 with Casing; use Casing;
35 with Csets; use Csets;
36 with Debug; use Debug;
37 with Einfo; use Einfo;
38 with Erroutc; use Erroutc;
39 with Fname; use Fname;
40 with Gnatvsn; use Gnatvsn;
41 with Hostparm; use Hostparm;
43 with Namet; use Namet;
45 with Nlists; use Nlists;
46 with Output; use Output;
47 with Scans; use Scans;
48 with Sinput; use Sinput;
49 with Sinfo; use Sinfo;
50 with Snames; use Snames;
51 with Stand; use Stand;
53 with Uname; use Uname;
55 with Unchecked_Conversion;
57 package body Errout is
59 Errors_Must_Be_Ignored : Boolean := False;
60 -- Set to True by procedure Set_Ignore_Errors (True), when calls to
61 -- error message procedures should be ignored (when parsing irrelevant
62 -- text in sources being preprocessed).
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;
142 -- Handle unit name insertion ($ insertion character)
144 procedure Set_Msg_Node (Node : Node_Id);
145 -- Add the sequence of characters for the name associated with the
146 -- given node to the current message.
148 procedure Set_Msg_Text (Text : String; Flag : Source_Ptr);
149 -- Add a sequence of characters to the current message. The characters may
150 -- be one of the special insertion characters (see documentation in spec).
151 -- Flag is the location at which the error is to be posted, which is used
152 -- to determine whether or not the # insertion needs a file name. The
153 -- variables Msg_Buffer, Msglen, Is_Style_Msg, Is_Warning_Msg, and
154 -- Is_Unconditional_Msg are set on return.
156 procedure Set_Posted (N : Node_Id);
157 -- Sets the Error_Posted flag on the given node, and all its parents
158 -- that are subexpressions and then on the parent non-subexpression
159 -- construct that contains the original expression (this reduces the
160 -- number of cascaded messages). Note that this call only has an effect
161 -- for a serious error. For a non-serious error, it has no effect.
163 procedure Set_Qualification (N : Nat; E : Entity_Id);
164 -- Outputs up to N levels of qualification for the given entity. For
165 -- example, the entity A.B.C.D will output B.C. if N = 2.
167 function Special_Msg_Delete
169 N : Node_Or_Entity_Id;
170 E : Node_Or_Entity_Id) return Boolean;
171 -- This function is called from Error_Msg_NEL, passing the message Msg,
172 -- node N on which the error is to be posted, and the entity or node E
173 -- to be used for an & insertion in the message if any. The job of this
174 -- procedure is to test for certain cascaded messages that we would like
175 -- to suppress. If the message is to be suppressed then we return True.
176 -- If the message should be generated (the normal case) False is returned.
178 procedure Unwind_Internal_Type (Ent : in out Entity_Id);
179 -- This procedure is given an entity id for an internal type, i.e.
180 -- a type with an internal name. It unwinds the type to try to get
181 -- to something reasonably printable, generating prefixes like
182 -- "subtype of", "access to", etc along the way in the buffer. The
183 -- value in Ent on return is the final name to be printed. Hopefully
184 -- this is not an internal name, but in some internal name cases, it
185 -- is an internal name, and has to be printed anyway (although in this
186 -- case the message has been killed if possible). The global variable
187 -- Class_Flag is set to True if the resulting entity should have
188 -- 'Class appended to its name (see Add_Class procedure), and is
189 -- otherwise unchanged.
191 procedure VMS_Convert;
192 -- This procedure has no effect if called when the host is not OpenVMS.
193 -- If the host is indeed OpenVMS, then the error message stored in
194 -- Msg_Buffer is scanned for appearences of switch names which need
195 -- converting to corresponding VMS qualifer names. See Gnames/Vnames
196 -- table in Errout spec for precise definition of the conversion that
197 -- is performed by this routine in OpenVMS mode.
199 -----------------------
200 -- Change_Error_Text --
201 -----------------------
203 procedure Change_Error_Text (Error_Id : Error_Msg_Id; New_Msg : String) is
204 Save_Next : Error_Msg_Id;
205 Err_Id : Error_Msg_Id := Error_Id;
208 Set_Msg_Text (New_Msg, Errors.Table (Error_Id).Sptr);
209 Errors.Table (Error_Id).Text := new String'(Msg_Buffer (1 .. Msglen));
211 -- If in immediate error message mode, output modified error message now
212 -- This is just a bit tricky, because we want to output just a single
213 -- message, and the messages we modified is already linked in. We solve
214 -- this by temporarily resetting its forward pointer to empty.
216 if Debug_Flag_OO then
217 Save_Next := Errors.Table (Error_Id).Next;
218 Errors.Table (Error_Id).Next := No_Error_Msg;
221 (Errors.Table (Error_Id).Line, Errors.Table (Error_Id).Sfile, True);
222 Output_Error_Msgs (Err_Id);
223 Errors.Table (Error_Id).Next := Save_Next;
225 end Change_Error_Text;
231 -- Error_Msg posts a flag at the given location, except that if the
232 -- Flag_Location points within a generic template and corresponds
233 -- to an instantiation of this generic template, then the actual
234 -- message will be posted on the generic instantiation, along with
235 -- additional messages referencing the generic declaration.
237 procedure Error_Msg (Msg : String; Flag_Location : Source_Ptr) is
238 Sindex : Source_File_Index;
239 -- Source index for flag location
241 Orig_Loc : Source_Ptr;
242 -- Original location of Flag_Location (i.e. location in original
243 -- template in instantiation case, otherwise unchanged).
246 -- It is a fatal error to issue an error message when scanning from
247 -- the internal source buffer (see Sinput for further documentation)
249 pragma Assert (Sinput.Source /= Internal_Source_Ptr);
251 -- Return if all errors are to be ignored
253 if Errors_Must_Be_Ignored then
257 -- If we already have messages, and we are trying to place a message
258 -- at No_Location or in package Standard, then just ignore the attempt
259 -- since we assume that what is happening is some cascaded junk. Note
260 -- that this is safe in the sense that proceeding will surely bomb.
262 if Flag_Location < First_Source_Ptr
263 and then Total_Errors_Detected > 0
268 -- Start processing of new message
270 Sindex := Get_Source_File_Index (Flag_Location);
271 Test_Style_Warning_Serious_Msg (Msg);
272 Orig_Loc := Original_Location (Flag_Location);
274 -- If the current location is in an instantiation, the issue arises
275 -- of whether to post the message on the template or the instantiation.
277 -- The way we decide is to see if we have posted the same message
278 -- on the template when we compiled the template (the template is
279 -- always compiled before any instantiations). For this purpose,
280 -- we use a separate table of messages. The reason we do this is
283 -- First, the messages can get changed by various processing
284 -- including the insertion of tokens etc, making it hard to
285 -- do the comparison.
287 -- Second, we will suppress a warning on a template if it is
288 -- not in the current extended source unit. That's reasonable
289 -- and means we don't want the warning on the instantiation
290 -- here either, but it does mean that the main error table
291 -- would not in any case include the message.
293 if Flag_Location = Orig_Loc then
294 Non_Instance_Msgs.Append ((new String'(Msg), Flag_Location));
295 Warn_On_Instance := False;
297 -- Here we have an instance message
300 -- Delete if debug flag off, and this message duplicates a
301 -- message already posted on the corresponding template
303 if not Debug_Flag_GG then
304 for J in Non_Instance_Msgs.First .. Non_Instance_Msgs.Last loop
305 if Msg = Non_Instance_Msgs.Table (J).Msg.all
306 and then Non_Instance_Msgs.Table (J).Loc = Orig_Loc
313 -- No duplicate, so error/warning will be posted on instance
315 Warn_On_Instance := Is_Warning_Msg;
318 -- Ignore warning message that is suppressed. Note that style
319 -- checks are not considered warning messages for this purpose
321 if Is_Warning_Msg and then Warnings_Suppressed (Orig_Loc) then
325 -- The idea at this stage is that we have two kinds of messages
327 -- First, we have those messages that are to be placed as requested at
328 -- Flag_Location. This includes messages that have nothing to do with
329 -- generics, and also messages placed on generic templates that reflect
330 -- an error in the template itself. For such messages we simply call
331 -- Error_Msg_Internal to place the message in the requested location.
333 if Instantiation (Sindex) = No_Location then
334 Error_Msg_Internal (Msg, Flag_Location, Flag_Location, False);
338 -- If we are trying to flag an error in an instantiation, we may have
339 -- a generic contract violation. What we generate in this case is:
341 -- instantiation error at ...
342 -- original error message
346 -- warning: in instantiation at
347 -- warning: original warning message
349 -- All these messages are posted at the location of the top level
350 -- instantiation. If there are nested instantiations, then the
351 -- instantiation error message can be repeated, pointing to each
352 -- of the relevant instantiations.
354 -- Note: the instantiation mechanism is also shared for inlining
355 -- of subprogram bodies when front end inlining is done. In this
356 -- case the messages have the form:
358 -- in inlined body at ...
359 -- original error message
363 -- warning: in inlined body at
364 -- warning: original warning message
366 -- OK, this is the case where we have an instantiation error, and
367 -- we need to generate the error on the instantiation, rather than
371 Actual_Error_Loc : Source_Ptr;
372 -- Location of outer level instantiation in instantiation case, or
373 -- just a copy of Flag_Location in the normal case. This is the
374 -- location where all error messages will actually be posted.
376 Save_Error_Msg_Sloc : constant Source_Ptr := Error_Msg_Sloc;
377 -- Save possible location set for caller's message. We need to
378 -- use Error_Msg_Sloc for the location of the instantiation error
379 -- but we have to preserve a possible original value.
381 X : Source_File_Index;
383 Msg_Cont_Status : Boolean;
384 -- Used to label continuation lines in instantiation case with
385 -- proper Msg_Cont status.
388 -- Loop to find highest level instantiation, where all error
389 -- messages will be placed.
393 Actual_Error_Loc := Instantiation (X);
394 X := Get_Source_File_Index (Actual_Error_Loc);
395 exit when Instantiation (X) = No_Location;
398 -- Since we are generating the messages at the instantiation
399 -- point in any case, we do not want the references to the
400 -- bad lines in the instance to be annotated with the location
401 -- of the instantiation.
403 Suppress_Instance_Location := True;
404 Msg_Cont_Status := False;
406 -- Loop to generate instantiation messages
408 Error_Msg_Sloc := Flag_Location;
409 X := Get_Source_File_Index (Flag_Location);
411 while Instantiation (X) /= No_Location loop
413 -- Suppress instantiation message on continuation lines
415 if Msg (Msg'First) /= '\' then
417 -- Case of inlined body
419 if Inlined_Body (X) then
420 if Is_Warning_Msg then
422 ("?in inlined body #",
423 Actual_Error_Loc, Flag_Location, Msg_Cont_Status);
427 ("error in inlined body #",
428 Actual_Error_Loc, Flag_Location, Msg_Cont_Status);
431 -- Case of generic instantiation
434 if Is_Warning_Msg then
436 ("?in instantiation #",
437 Actual_Error_Loc, Flag_Location, Msg_Cont_Status);
441 ("instantiation error #",
442 Actual_Error_Loc, Flag_Location, Msg_Cont_Status);
447 Error_Msg_Sloc := Instantiation (X);
448 X := Get_Source_File_Index (Error_Msg_Sloc);
449 Msg_Cont_Status := True;
452 Suppress_Instance_Location := False;
453 Error_Msg_Sloc := Save_Error_Msg_Sloc;
455 -- Here we output the original message on the outer instantiation
458 (Msg, Actual_Error_Loc, Flag_Location, Msg_Cont_Status);
466 procedure Error_Msg_AP (Msg : String) is
471 -- If we had saved the Scan_Ptr value after scanning the previous
472 -- token, then we would have exactly the right place for putting
473 -- the flag immediately at hand. However, that would add at least
474 -- two instructions to a Scan call *just* to service the possibility
475 -- of an Error_Msg_AP call. So instead we reconstruct that value.
477 -- We have two possibilities, start with Prev_Token_Ptr and skip over
478 -- the current token, which is made harder by the possibility that this
479 -- token may be in error, or start with Token_Ptr and work backwards.
480 -- We used to take the second approach, but it's hard because of
481 -- comments, and harder still because things that look like comments
482 -- can appear inside strings. So now we take the first approach.
484 -- Note: in the case where there is no previous token, Prev_Token_Ptr
485 -- is set to Source_First, which is a reasonable position for the
486 -- error flag in this situation.
488 S1 := Prev_Token_Ptr;
491 -- If the previous token is a string literal, we need a special approach
492 -- since there may be white space inside the literal and we don't want
493 -- to stop on that white space.
495 -- Note: since this is an error recovery issue anyway, it is not worth
496 -- worrying about special UTF_32 line terminator characters here.
498 if Prev_Token = Tok_String_Literal then
502 if Source (S1) = C then
504 exit when Source (S1) /= C;
505 elsif Source (S1) in Line_Terminator then
510 -- Character literal also needs special handling
512 elsif Prev_Token = Tok_Char_Literal then
515 -- Otherwise we search forward for the end of the current token, marked
516 -- by a line terminator, white space, a comment symbol or if we bump
517 -- into the following token (i.e. the current token).
519 -- Again, it is not worth worrying about UTF_32 special line terminator
520 -- characters in this context, since this is only for error recovery.
523 while Source (S1) not in Line_Terminator
524 and then Source (S1) /= ' '
525 and then Source (S1) /= ASCII.HT
526 and then (Source (S1) /= '-' or else Source (S1 + 1) /= '-')
527 and then S1 /= Token_Ptr
533 -- S1 is now set to the location for the flag
542 procedure Error_Msg_BC (Msg : String) is
544 -- If we are at end of file, post the flag after the previous token
546 if Token = Tok_EOF then
549 -- If we are at start of file, post the flag at the current token
551 elsif Token_Ptr = Source_First (Current_Source_File) then
554 -- If the character before the current token is a space or a horizontal
555 -- tab, then we place the flag on this character (in the case of a tab
556 -- we would really like to place it in the "last" character of the tab
557 -- space, but that it too much trouble to worry about).
559 elsif Source (Token_Ptr - 1) = ' '
560 or else Source (Token_Ptr - 1) = ASCII.HT
562 Error_Msg (Msg, Token_Ptr - 1);
564 -- If there is no space or tab before the current token, then there is
565 -- no room to place the flag before the token, so we place it on the
566 -- token instead (this happens for example at the start of a line).
569 Error_Msg (Msg, Token_Ptr);
577 procedure Error_Msg_CRT (Feature : String; N : Node_Id) is
578 CNRT : constant String := " not allowed in no run time mode";
579 CCRT : constant String := " not supported by configuration>";
581 S : String (1 .. Feature'Length + 1 + CCRT'Length);
586 S (2 .. Feature'Length + 1) := Feature;
587 L := Feature'Length + 2;
589 if No_Run_Time_Mode then
590 S (L .. L + CNRT'Length - 1) := CNRT;
591 L := L + CNRT'Length - 1;
593 else pragma Assert (Configurable_Run_Time_Mode);
594 S (L .. L + CCRT'Length - 1) := CCRT;
595 L := L + CCRT'Length - 1;
598 Error_Msg_N (S (1 .. L), N);
599 Configurable_Run_Time_Violations := Configurable_Run_Time_Violations + 1;
606 procedure Error_Msg_F (Msg : String; N : Node_Id) is
608 Error_Msg_NEL (Msg, N, N, Sloc (First_Node (N)));
615 procedure Error_Msg_FE
618 E : Node_Or_Entity_Id)
621 Error_Msg_NEL (Msg, N, E, Sloc (First_Node (N)));
624 ------------------------
625 -- Error_Msg_Internal --
626 ------------------------
628 procedure Error_Msg_Internal
634 Next_Msg : Error_Msg_Id;
635 -- Pointer to next message at insertion point
637 Prev_Msg : Error_Msg_Id;
638 -- Pointer to previous message at insertion point
640 Temp_Msg : Error_Msg_Id;
642 procedure Handle_Serious_Error;
643 -- Internal procedure to do all error message handling for a serious
644 -- error message, other than bumping the error counts and arranging
645 -- for the message to be output.
647 --------------------------
648 -- Handle_Serious_Error --
649 --------------------------
651 procedure Handle_Serious_Error is
653 -- Turn off code generation if not done already
655 if Operating_Mode = Generate_Code then
656 Operating_Mode := Check_Semantics;
657 Expander_Active := False;
660 -- Set the fatal error flag in the unit table unless we are
661 -- in Try_Semantics mode. This stops the semantics from being
662 -- performed if we find a serious error. This is skipped if we
663 -- are currently dealing with the configuration pragma file.
666 and then Current_Source_Unit /= No_Unit
668 Set_Fatal_Error (Get_Source_Unit (Sptr));
670 end Handle_Serious_Error;
672 -- Start of processing for Error_Msg_Internal
675 if Raise_Exception_On_Error /= 0 then
676 raise Error_Msg_Exception;
679 Continuation := Msg_Cont;
680 Continuation_New_Line := False;
681 Suppress_Message := False;
682 Kill_Message := False;
683 Set_Msg_Text (Msg, Sptr);
685 -- Kill continuation if parent message killed
687 if Continuation and Last_Killed then
691 -- Return without doing anything if message is suppressed
694 and not All_Errors_Mode
695 and not (Msg (Msg'Last) = '!')
696 and not Is_Warning_Msg
698 if not Continuation then
705 -- Return without doing anything if message is killed and this
706 -- is not the first error message. The philosophy is that if we
707 -- get a weird error message and we already have had a message,
708 -- then we hope the weird message is a junk cascaded message
711 and then not All_Errors_Mode
712 and then Total_Errors_Detected /= 0
714 if not Continuation then
721 -- Special check for warning message to see if it should be output
723 if Is_Warning_Msg then
725 -- Immediate return if warning message and warnings are suppressed
727 if Warnings_Suppressed (Optr)
728 or else Warnings_Suppressed (Sptr)
730 Cur_Msg := No_Error_Msg;
734 -- If the flag location is in the main extended source unit
735 -- then for sure we want the warning since it definitely belongs
737 if In_Extended_Main_Source_Unit (Sptr) then
740 -- If the flag location is not in the main extended source unit,
741 -- then we want to eliminate the warning, unless it is in the
742 -- extended main code unit and we want warnings on the instance.
744 elsif In_Extended_Main_Code_Unit (Sptr)
745 and then Warn_On_Instance
749 -- Keep warning if debug flag G set
751 elsif Debug_Flag_GG then
754 -- Here is where we delete a warning from a with'ed unit
757 Cur_Msg := No_Error_Msg;
759 if not Continuation then
767 -- If message is to be ignored in special ignore message mode, this is
768 -- where we do this special processing, bypassing message output.
770 if Ignore_Errors_Enable > 0 then
771 if Is_Serious_Error then
772 Handle_Serious_Error;
778 -- If error message line length set, and this is a continuation message
779 -- then all we do is to append the text to the text of the last message
780 -- with a comma space separator.
782 if Error_Msg_Line_Length /= 0
783 and then Continuation
785 Cur_Msg := Errors.Last;
788 Oldm : String_Ptr := Errors.Table (Cur_Msg).Text;
789 Newm : String (1 .. Oldm'Last + 2 + Msglen);
793 -- First copy old message to new one and free it
795 Newm (Oldm'Range) := Oldm.all;
799 -- Now deal with separation between messages. Normally this
800 -- is simply comma space, but there are some special cases.
802 -- If continuation new line, then put actual NL character in msg
804 if Continuation_New_Line then
806 Newm (Newl) := ASCII.LF;
808 -- If continuation message is enclosed in parentheses, then
809 -- special treatment (don't need a comma, and we want to combine
810 -- successive parenthetical remarks into a single one with
811 -- separating commas).
813 elsif Msg_Buffer (1) = '(' and then Msg_Buffer (Msglen) = ')' then
815 -- Case where existing message ends in right paren, remove
816 -- and separate parenthetical remarks with a comma.
818 if Newm (Newl) = ')' then
820 Msg_Buffer (1) := ' ';
822 -- Case where we are adding new parenthetical comment
829 -- Case where continuation not in parens and no new line
832 Newm (Newl + 1 .. Newl + 2) := ", ";
836 -- Append new message
838 Newm (Newl + 1 .. Newl + Msglen) := Msg_Buffer (1 .. Msglen);
839 Newl := Newl + Msglen;
840 Errors.Table (Cur_Msg).Text := new String'(Newm (1 .. Newl));
846 -- Otherwise build error message object for new message
848 Errors.Increment_Last;
849 Cur_Msg := Errors.Last;
850 Errors.Table (Cur_Msg).Text := new String'(Msg_Buffer (1 .. Msglen));
851 Errors.Table (Cur_Msg).Next := No_Error_Msg;
852 Errors.Table (Cur_Msg).Sptr := Sptr;
853 Errors.Table (Cur_Msg).Optr := Optr;
854 Errors.Table (Cur_Msg).Sfile := Get_Source_File_Index (Sptr);
855 Errors.Table (Cur_Msg).Line := Get_Physical_Line_Number (Sptr);
856 Errors.Table (Cur_Msg).Col := Get_Column_Number (Sptr);
857 Errors.Table (Cur_Msg).Warn := Is_Warning_Msg;
858 Errors.Table (Cur_Msg).Style := Is_Style_Msg;
859 Errors.Table (Cur_Msg).Serious := Is_Serious_Error;
860 Errors.Table (Cur_Msg).Uncond := Is_Unconditional_Msg
862 Errors.Table (Cur_Msg).Msg_Cont := Continuation;
863 Errors.Table (Cur_Msg).Deleted := False;
865 -- If immediate errors mode set, output error message now. Also output
866 -- now if the -d1 debug flag is set (so node number message comes out
867 -- just before actual error message)
869 if Debug_Flag_OO or else Debug_Flag_1 then
872 (Errors.Table (Cur_Msg).Line, Errors.Table (Cur_Msg).Sfile, True);
874 Output_Error_Msgs (Temp_Msg);
876 -- If not in immediate errors mode, then we insert the message in the
877 -- error chain for later output by Finalize. The messages are sorted
878 -- first by unit (main unit comes first), and within a unit by source
879 -- location (earlier flag location first in the chain).
882 -- First a quick check, does this belong at the very end of the chain
883 -- of error messages. This saves a lot of time in the normal case if
884 -- there are lots of messages.
886 if Last_Error_Msg /= No_Error_Msg
887 and then Errors.Table (Cur_Msg).Sfile =
888 Errors.Table (Last_Error_Msg).Sfile
889 and then (Sptr > Errors.Table (Last_Error_Msg).Sptr
891 (Sptr = Errors.Table (Last_Error_Msg).Sptr
893 Optr > Errors.Table (Last_Error_Msg).Optr))
895 Prev_Msg := Last_Error_Msg;
896 Next_Msg := No_Error_Msg;
898 -- Otherwise do a full sequential search for the insertion point
901 Prev_Msg := No_Error_Msg;
902 Next_Msg := First_Error_Msg;
903 while Next_Msg /= No_Error_Msg loop
905 Errors.Table (Cur_Msg).Sfile < Errors.Table (Next_Msg).Sfile;
907 if Errors.Table (Cur_Msg).Sfile =
908 Errors.Table (Next_Msg).Sfile
910 exit when Sptr < Errors.Table (Next_Msg).Sptr
912 (Sptr = Errors.Table (Next_Msg).Sptr
914 Optr < Errors.Table (Next_Msg).Optr);
917 Prev_Msg := Next_Msg;
918 Next_Msg := Errors.Table (Next_Msg).Next;
922 -- Now we insert the new message in the error chain. The insertion
923 -- point for the message is after Prev_Msg and before Next_Msg.
925 -- The possible insertion point for the new message is after Prev_Msg
926 -- and before Next_Msg. However, this is where we do a special check
927 -- for redundant parsing messages, defined as messages posted on the
928 -- same line. The idea here is that probably such messages are junk
929 -- from the parser recovering. In full errors mode, we don't do this
930 -- deletion, but otherwise such messages are discarded at this stage.
932 if Prev_Msg /= No_Error_Msg
933 and then Errors.Table (Prev_Msg).Line =
934 Errors.Table (Cur_Msg).Line
935 and then Errors.Table (Prev_Msg).Sfile =
936 Errors.Table (Cur_Msg).Sfile
937 and then Compiler_State = Parsing
938 and then not All_Errors_Mode
940 -- Don't delete unconditional messages and at this stage,
941 -- don't delete continuation lines (we attempted to delete
942 -- those earlier if the parent message was deleted.
944 if not Errors.Table (Cur_Msg).Uncond
945 and then not Continuation
947 -- Don't delete if prev msg is warning and new msg is an error.
948 -- This is because we don't want a real error masked by a
949 -- warning. In all other cases (that is parse errors for the
950 -- same line that are not unconditional) we do delete the
951 -- message. This helps to avoid junk extra messages from
952 -- cascaded parsing errors
954 if not (Errors.Table (Prev_Msg).Warn
956 Errors.Table (Prev_Msg).Style)
958 (Errors.Table (Cur_Msg).Warn
960 Errors.Table (Cur_Msg).Style)
962 -- All tests passed, delete the message by simply returning
963 -- without any further processing.
965 if not Continuation then
974 -- Come here if message is to be inserted in the error chain
976 if not Continuation then
977 Last_Killed := False;
980 if Prev_Msg = No_Error_Msg then
981 First_Error_Msg := Cur_Msg;
983 Errors.Table (Prev_Msg).Next := Cur_Msg;
986 Errors.Table (Cur_Msg).Next := Next_Msg;
988 if Next_Msg = No_Error_Msg then
989 Last_Error_Msg := Cur_Msg;
993 -- Bump appropriate statistics count
995 if Errors.Table (Cur_Msg).Warn
996 or else Errors.Table (Cur_Msg).Style
998 Warnings_Detected := Warnings_Detected + 1;
1000 Total_Errors_Detected := Total_Errors_Detected + 1;
1002 if Errors.Table (Cur_Msg).Serious then
1003 Serious_Errors_Detected := Serious_Errors_Detected + 1;
1004 Handle_Serious_Error;
1008 -- Terminate if max errors reached
1010 if Total_Errors_Detected + Warnings_Detected = Maximum_Errors then
1011 raise Unrecoverable_Error;
1013 end Error_Msg_Internal;
1019 procedure Error_Msg_N (Msg : String; N : Node_Or_Entity_Id) is
1021 Error_Msg_NEL (Msg, N, N, Sloc (N));
1028 procedure Error_Msg_NE
1030 N : Node_Or_Entity_Id;
1031 E : Node_Or_Entity_Id)
1034 Error_Msg_NEL (Msg, N, E, Sloc (N));
1041 procedure Error_Msg_NEL
1043 N : Node_Or_Entity_Id;
1044 E : Node_Or_Entity_Id;
1045 Flag_Location : Source_Ptr)
1048 if Special_Msg_Delete (Msg, N, E) then
1052 Test_Style_Warning_Serious_Msg (Msg);
1054 -- Special handling for warning messages
1056 if Is_Warning_Msg then
1058 -- Suppress if no warnings set for either entity or node
1060 if No_Warnings (N) or else No_Warnings (E) then
1064 -- Suppress if inside loop that is known to be null
1071 while Present (P) loop
1072 if Nkind (P) = N_Loop_Statement and then Is_Null_Loop (P) then
1081 -- Test for message to be output
1084 or else Msg (Msg'Last) = '!'
1085 or else Is_Warning_Msg
1087 or else (Msg (Msg'First) = '\' and not Last_Killed)
1090 Error_Msg_Node_1 := E;
1091 Error_Msg (Msg, Flag_Location);
1094 Last_Killed := True;
1097 if not Is_Warning_Msg and then not Is_Style_Msg then
1106 procedure Error_Msg_NW
1109 N : Node_Or_Entity_Id)
1113 and then In_Extended_Main_Source_Unit (N)
1114 and then Comes_From_Source (N)
1116 Error_Msg_NEL (Msg, N, N, Sloc (N));
1124 procedure Error_Msg_S (Msg : String) is
1126 Error_Msg (Msg, Scan_Ptr);
1133 procedure Error_Msg_SC (Msg : String) is
1135 -- If we are at end of file, post the flag after the previous token
1137 if Token = Tok_EOF then
1140 -- For all other cases the message is posted at the current token
1144 Error_Msg (Msg, Token_Ptr);
1152 procedure Error_Msg_SP (Msg : String) is
1154 -- Note: in the case where there is no previous token, Prev_Token_Ptr
1155 -- is set to Source_First, which is a reasonable position for the
1156 -- error flag in this situation
1158 Error_Msg (Msg, Prev_Token_Ptr);
1165 procedure Finalize is
1168 E, F : Error_Msg_Id;
1171 procedure Write_Error_Summary;
1172 -- Write error summary
1174 procedure Write_Header (Sfile : Source_File_Index);
1175 -- Write header line (compiling or checking given file)
1177 procedure Write_Max_Errors;
1178 -- Write message if max errors reached
1180 -------------------------
1181 -- Write_Error_Summary --
1182 -------------------------
1184 procedure Write_Error_Summary is
1186 -- Extra blank line if error messages or source listing were output
1188 if Total_Errors_Detected + Warnings_Detected > 0
1194 -- Message giving number of lines read and number of errors detected.
1195 -- This normally goes to Standard_Output. The exception is when brief
1196 -- mode is not set, verbose mode (or full list mode) is set, and
1197 -- there are errors. In this case we send the message to standard
1198 -- error to make sure that *something* appears on standard error in
1199 -- an error situation.
1201 -- Formerly, only the "# errors" suffix was sent to stderr, whereas
1202 -- "# lines:" appeared on stdout. This caused problems on VMS when
1203 -- the stdout buffer was flushed, giving an extra line feed after
1206 if Total_Errors_Detected + Warnings_Detected /= 0
1207 and then not Brief_Output
1208 and then (Verbose_Mode or Full_List)
1213 -- Message giving total number of lines
1216 Write_Int (Num_Source_Lines (Main_Source_File));
1218 if Num_Source_Lines (Main_Source_File) = 1 then
1219 Write_Str (" line: ");
1221 Write_Str (" lines: ");
1224 if Total_Errors_Detected = 0 then
1225 Write_Str ("No errors");
1227 elsif Total_Errors_Detected = 1 then
1228 Write_Str ("1 error");
1231 Write_Int (Total_Errors_Detected);
1232 Write_Str (" errors");
1235 if Warnings_Detected /= 0 then
1237 Write_Int (Warnings_Detected);
1238 Write_Str (" warning");
1240 if Warnings_Detected /= 1 then
1244 if Warning_Mode = Treat_As_Error then
1245 Write_Str (" (treated as error");
1247 if Warnings_Detected /= 1 then
1256 Set_Standard_Output;
1257 end Write_Error_Summary;
1263 procedure Write_Header (Sfile : Source_File_Index) is
1265 if Verbose_Mode or Full_List then
1266 if Original_Operating_Mode = Generate_Code then
1267 Write_Str ("Compiling: ");
1269 Write_Str ("Checking: ");
1272 Write_Name (Full_File_Name (Sfile));
1274 if not Debug_Flag_7 then
1275 Write_Str (" (source file time stamp: ");
1276 Write_Time_Stamp (Sfile);
1284 ----------------------
1285 -- Write_Max_Errors --
1286 ----------------------
1288 procedure Write_Max_Errors is
1290 if Maximum_Errors /= 0
1291 and then Total_Errors_Detected + Warnings_Detected = Maximum_Errors
1294 Write_Str ("fatal error: maximum errors reached");
1296 Set_Standard_Output;
1298 end Write_Max_Errors;
1300 -- Start of processing for Finalize
1303 -- Reset current error source file if the main unit has a pragma
1304 -- Source_Reference. This ensures outputting the proper name of
1305 -- the source file in this situation.
1307 if Main_Source_File = No_Source_File or else
1308 Num_SRef_Pragmas (Main_Source_File) /= 0
1310 Current_Error_Source_File := No_Source_File;
1313 -- Eliminate any duplicated error messages from the list. This is
1314 -- done after the fact to avoid problems with Change_Error_Text.
1316 Cur := First_Error_Msg;
1317 while Cur /= No_Error_Msg loop
1318 Nxt := Errors.Table (Cur).Next;
1321 while F /= No_Error_Msg
1322 and then Errors.Table (F).Sptr = Errors.Table (Cur).Sptr
1324 Check_Duplicate_Message (Cur, F);
1325 F := Errors.Table (F).Next;
1331 -- Mark any messages suppressed by specific warnings as Deleted
1333 Cur := First_Error_Msg;
1334 while Cur /= No_Error_Msg loop
1335 if Warning_Specifically_Suppressed
1336 (Errors.Table (Cur).Sptr,
1337 Errors.Table (Cur).Text)
1339 Errors.Table (Cur).Deleted := True;
1340 Warnings_Detected := Warnings_Detected - 1;
1343 Cur := Errors.Table (Cur).Next;
1346 -- Check consistency of specific warnings (may add warnings)
1348 Validate_Specific_Warnings (Error_Msg'Access);
1352 if Brief_Output or (not Full_List and not Verbose_Mode) then
1355 E := First_Error_Msg;
1356 while E /= No_Error_Msg loop
1357 if not Errors.Table (E).Deleted and then not Debug_Flag_KK then
1358 if Full_Path_Name_For_Brief_Errors then
1359 Write_Name (Full_Ref_Name (Errors.Table (E).Sfile));
1361 Write_Name (Reference_Name (Errors.Table (E).Sfile));
1365 Write_Int (Int (Physical_To_Logical
1366 (Errors.Table (E).Line,
1367 Errors.Table (E).Sfile)));
1370 if Errors.Table (E).Col < 10 then
1374 Write_Int (Int (Errors.Table (E).Col));
1376 Output_Msg_Text (E);
1380 E := Errors.Table (E).Next;
1383 Set_Standard_Output;
1386 -- Full source listing case
1389 List_Pragmas_Index := 1;
1390 List_Pragmas_Mode := True;
1391 E := First_Error_Msg;
1393 -- Normal case, to stdout (copyright notice already output)
1395 if Full_List_File_Name = null then
1396 if not Debug_Flag_7 then
1403 Create_List_File_Access.all (Full_List_File_Name.all);
1404 Set_Special_Output (Write_List_Info_Access.all'Access);
1406 -- Write copyright notice to file
1408 if not Debug_Flag_7 then
1409 Write_Str ("GNAT ");
1410 Write_Str (Gnat_Version_String);
1412 Write_Str ("Copyright 1992-" &
1414 ", Free Software Foundation, Inc.");
1419 -- First list extended main source file units with errors
1421 -- Note: if debug flag d.m is set, only the main source is listed
1423 for U in Main_Unit .. Last_Unit loop
1424 if In_Extended_Main_Source_Unit (Cunit_Entity (U))
1425 and then (U = Main_Unit or else not Debug_Flag_Dot_M)
1428 Sfile : constant Source_File_Index := Source_Index (U);
1432 Write_Header (Sfile);
1435 -- Normally, we don't want an "error messages from file"
1436 -- message when listing the entire file, so we set the
1437 -- current source file as the current error source file.
1438 -- However, the old style of doing things was to list this
1439 -- message if pragma Source_Reference is present, even for
1440 -- the main unit. Since the purpose of the -gnatd.m switch
1441 -- is to duplicate the old behavior, we skip the reset if
1442 -- this debug flag is set.
1444 if not Debug_Flag_Dot_M then
1445 Current_Error_Source_File := Sfile;
1448 for N in 1 .. Last_Source_Line (Sfile) loop
1449 while E /= No_Error_Msg
1450 and then Errors.Table (E).Deleted
1452 E := Errors.Table (E).Next;
1457 and then Errors.Table (E).Line = N
1458 and then Errors.Table (E).Sfile = Sfile;
1460 Output_Source_Line (N, Sfile, Err_Flag);
1463 Output_Error_Msgs (E);
1465 if not Debug_Flag_2 then
1474 -- Then output errors, if any, for subsidiary units not in the
1475 -- main extended unit.
1477 -- Note: if debug flag d.m set, include errors for any units other
1478 -- than the main unit in the extended source unit (e.g. spec and
1479 -- subunits for a body).
1481 while E /= No_Error_Msg
1482 and then (not In_Extended_Main_Source_Unit (Errors.Table (E).Sptr)
1485 and then Get_Source_Unit
1486 (Errors.Table (E).Sptr) /= Main_Unit))
1488 if Errors.Table (E).Deleted then
1489 E := Errors.Table (E).Next;
1494 (Errors.Table (E).Line, Errors.Table (E).Sfile, True);
1495 Output_Error_Msgs (E);
1499 -- If output to file, write extra copy of error summary to the
1500 -- output file, and then close it.
1502 if Full_List_File_Name /= null then
1503 Write_Error_Summary;
1505 Close_List_File_Access.all;
1506 Cancel_Special_Output;
1510 -- Verbose mode (error lines only with error flags). Normally this is
1511 -- ignored in full list mode, unless we are listing to a file, in which
1512 -- case we still generate -gnatv output to standard output.
1515 and then (not Full_List or else Full_List_File_Name /= null)
1518 Write_Header (Main_Source_File);
1519 E := First_Error_Msg;
1521 -- Loop through error lines
1523 while E /= No_Error_Msg loop
1524 if Errors.Table (E).Deleted then
1525 E := Errors.Table (E).Next;
1529 (Errors.Table (E).Line, Errors.Table (E).Sfile, True);
1530 Output_Error_Msgs (E);
1535 -- Output error summary if verbose or full list mode
1537 if Verbose_Mode or else Full_List then
1538 Write_Error_Summary;
1543 if Warning_Mode = Treat_As_Error then
1544 Total_Errors_Detected := Total_Errors_Detected + Warnings_Detected;
1545 Warnings_Detected := 0;
1553 function First_Node (C : Node_Id) return Node_Id is
1554 L : constant Source_Ptr := Sloc (Original_Node (C));
1555 Sfile : constant Source_File_Index := Get_Source_File_Index (L);
1558 Discard : Traverse_Result;
1560 pragma Warnings (Off, Discard);
1562 function Test_Earlier (N : Node_Id) return Traverse_Result;
1563 -- Function applied to every node in the construct
1565 function Search_Tree_First is new Traverse_Func (Test_Earlier);
1566 -- Create traversal function
1572 function Test_Earlier (N : Node_Id) return Traverse_Result is
1573 Loc : constant Source_Ptr := Sloc (Original_Node (N));
1576 -- Check for earlier. The tests for being in the same file ensures
1577 -- against strange cases of foreign code somehow being present. We
1578 -- don't want wild placement of messages if that happens, so it is
1579 -- best to just ignore this situation.
1582 and then Get_Source_File_Index (Loc) = Sfile
1584 Earliest := Original_Node (N);
1591 -- Start of processing for First_Node
1594 Earliest := Original_Node (C);
1595 Eloc := Sloc (Earliest);
1596 Discard := Search_Tree_First (Original_Node (C));
1604 function First_Sloc (N : Node_Id) return Source_Ptr is
1605 SI : constant Source_File_Index := Source_Index (Get_Source_Unit (N));
1606 SF : constant Source_Ptr := Source_First (SI);
1611 F := First_Node (N);
1614 -- The following circuit is a bit subtle. When we have parenthesized
1615 -- expressions, then the Sloc will not record the location of the
1616 -- paren, but we would like to post the flag on the paren. So what
1617 -- we do is to crawl up the tree from the First_Node, adjusting the
1618 -- Sloc value for any parentheses we know are present. Yes, we know
1619 -- this circuit is not 100% reliable (e.g. because we don't record
1620 -- all possible paren level valoues), but this is only for an error
1621 -- message so it is good enough.
1624 Paren_Loop : for J in 1 .. Paren_Count (F) loop
1626 -- We don't look more than 12 characters behind the current
1627 -- location, and in any case not past the front of the source.
1629 Search_Loop : for K in 1 .. 12 loop
1630 exit Search_Loop when S = SF;
1632 if Source_Text (SI) (S - 1) = '(' then
1636 elsif Source_Text (SI) (S - 1) <= ' ' then
1642 end loop Search_Loop;
1643 end loop Paren_Loop;
1645 exit Node_Loop when F = N;
1647 exit Node_Loop when Nkind (F) not in N_Subexpr;
1657 procedure Initialize is
1660 First_Error_Msg := No_Error_Msg;
1661 Last_Error_Msg := No_Error_Msg;
1662 Serious_Errors_Detected := 0;
1663 Total_Errors_Detected := 0;
1664 Warnings_Detected := 0;
1665 Cur_Msg := No_Error_Msg;
1668 -- Initialize warnings table, if all warnings are suppressed, supply
1669 -- an initial dummy entry covering all possible source locations.
1672 Specific_Warnings.Init;
1674 if Warning_Mode = Suppress then
1675 Warnings.Increment_Last;
1676 Warnings.Table (Warnings.Last).Start := Source_Ptr'First;
1677 Warnings.Table (Warnings.Last).Stop := Source_Ptr'Last;
1685 function No_Warnings (N : Node_Or_Entity_Id) return Boolean is
1687 if Error_Posted (N) then
1690 elsif Nkind (N) in N_Entity and then Warnings_Off (N) then
1693 elsif Is_Entity_Name (N)
1694 and then Present (Entity (N))
1695 and then Warnings_Off (Entity (N))
1708 function OK_Node (N : Node_Id) return Boolean is
1709 K : constant Node_Kind := Nkind (N);
1712 if Error_Posted (N) then
1715 elsif K in N_Has_Etype
1716 and then Present (Etype (N))
1717 and then Error_Posted (Etype (N))
1722 or else K = N_Attribute_Reference
1723 or else K = N_Character_Literal
1724 or else K = N_Expanded_Name
1725 or else K = N_Identifier
1726 or else K = N_Operator_Symbol)
1727 and then Present (Entity (N))
1728 and then Error_Posted (Entity (N))
1736 ------------------------
1737 -- Output_Source_Line --
1738 ------------------------
1740 procedure Output_Source_Line
1741 (L : Physical_Line_Number;
1742 Sfile : Source_File_Index;
1748 Line_Number_Output : Boolean := False;
1749 -- Set True once line number is output
1752 if Sfile /= Current_Error_Source_File then
1753 Write_Str ("==============Error messages for ");
1755 case Sinput.File_Type (Sfile) is
1757 Write_Str ("source");
1759 when Sinput.Config =>
1760 Write_Str ("configuration pragmas");
1763 Write_Str ("symbol definition");
1765 when Sinput.Preproc =>
1766 Write_Str ("preprocessing data");
1769 Write_Str (" file: ");
1770 Write_Name (Full_File_Name (Sfile));
1773 if Num_SRef_Pragmas (Sfile) > 0 then
1774 Write_Str ("--------------Line numbers from file: ");
1775 Write_Name (Full_Ref_Name (Sfile));
1776 Write_Str (" (starting at line ");
1777 Write_Int (Int (First_Mapped_Line (Sfile)));
1782 Current_Error_Source_File := Sfile;
1785 if Errs or List_Pragmas_Mode then
1786 Output_Line_Number (Physical_To_Logical (L, Sfile));
1787 Line_Number_Output := True;
1790 S := Line_Start (L, Sfile);
1793 C := Source_Text (Sfile) (S);
1794 exit when C = ASCII.LF or else C = ASCII.CR or else C = EOF;
1796 -- Deal with matching entry in List_Pragmas table
1799 and then List_Pragmas_Index <= List_Pragmas.Last
1800 and then S = List_Pragmas.Table (List_Pragmas_Index).Ploc
1802 case List_Pragmas.Table (List_Pragmas_Index).Ptyp is
1806 -- Ignore if on line with errors so that error flags
1807 -- get properly listed with the error line .
1810 Write_Char (ASCII.FF);
1814 List_Pragmas_Mode := True;
1816 if not Line_Number_Output then
1817 Output_Line_Number (Physical_To_Logical (L, Sfile));
1818 Line_Number_Output := True;
1825 List_Pragmas_Mode := False;
1828 List_Pragmas_Index := List_Pragmas_Index + 1;
1830 -- Normal case (no matching entry in List_Pragmas table)
1833 if Errs or List_Pragmas_Mode then
1841 if Line_Number_Output then
1844 end Output_Source_Line;
1846 -----------------------------
1847 -- Remove_Warning_Messages --
1848 -----------------------------
1850 procedure Remove_Warning_Messages (N : Node_Id) is
1852 function Check_For_Warning (N : Node_Id) return Traverse_Result;
1853 -- This function checks one node for a possible warning message
1855 function Check_All_Warnings is new
1856 Traverse_Func (Check_For_Warning);
1857 -- This defines the traversal operation
1859 -----------------------
1860 -- Check_For_Warning --
1861 -----------------------
1863 function Check_For_Warning (N : Node_Id) return Traverse_Result is
1864 Loc : constant Source_Ptr := Sloc (N);
1867 function To_Be_Removed (E : Error_Msg_Id) return Boolean;
1868 -- Returns True for a message that is to be removed. Also adjusts
1869 -- warning count appropriately.
1875 function To_Be_Removed (E : Error_Msg_Id) return Boolean is
1877 if E /= No_Error_Msg
1878 and then Errors.Table (E).Optr = Loc
1879 and then (Errors.Table (E).Warn or Errors.Table (E).Style)
1881 Warnings_Detected := Warnings_Detected - 1;
1888 -- Start of processing for Check_For_Warnings
1891 while To_Be_Removed (First_Error_Msg) loop
1892 First_Error_Msg := Errors.Table (First_Error_Msg).Next;
1895 if First_Error_Msg = No_Error_Msg then
1896 Last_Error_Msg := No_Error_Msg;
1899 E := First_Error_Msg;
1900 while E /= No_Error_Msg loop
1901 while To_Be_Removed (Errors.Table (E).Next) loop
1902 Errors.Table (E).Next :=
1903 Errors.Table (Errors.Table (E).Next).Next;
1905 if Errors.Table (E).Next = No_Error_Msg then
1906 Last_Error_Msg := E;
1910 E := Errors.Table (E).Next;
1913 if Nkind (N) = N_Raise_Constraint_Error
1914 and then Original_Node (N) /= N
1915 and then No (Condition (N))
1917 -- Warnings may have been posted on subexpressions of
1918 -- the original tree. We place the original node back
1919 -- on the tree to remove those warnings, whose sloc
1920 -- do not match those of any node in the current tree.
1921 -- Given that we are in unreachable code, this modification
1922 -- to the tree is harmless.
1925 Status : Traverse_Result;
1928 if Is_List_Member (N) then
1929 Set_Condition (N, Original_Node (N));
1930 Status := Check_All_Warnings (Condition (N));
1932 Rewrite (N, Original_Node (N));
1933 Status := Check_All_Warnings (N);
1942 end Check_For_Warning;
1944 -- Start of processing for Remove_Warning_Messages
1947 if Warnings_Detected /= 0 then
1949 Discard : Traverse_Result;
1950 pragma Warnings (Off, Discard);
1953 Discard := Check_All_Warnings (N);
1956 end Remove_Warning_Messages;
1958 procedure Remove_Warning_Messages (L : List_Id) is
1961 if Is_Non_Empty_List (L) then
1964 while Present (Stat) loop
1965 Remove_Warning_Messages (Stat);
1969 end Remove_Warning_Messages;
1971 ---------------------------
1972 -- Set_Identifier_Casing --
1973 ---------------------------
1975 procedure Set_Identifier_Casing
1976 (Identifier_Name : System.Address;
1977 File_Name : System.Address)
1979 type Big_String is array (Positive) of Character;
1980 type Big_String_Ptr is access all Big_String;
1982 function To_Big_String_Ptr is new Unchecked_Conversion
1983 (System.Address, Big_String_Ptr);
1985 Ident : constant Big_String_Ptr := To_Big_String_Ptr (Identifier_Name);
1986 File : constant Big_String_Ptr := To_Big_String_Ptr (File_Name);
1989 Desired_Case : Casing_Type := Mixed_Case;
1990 -- Casing required for result. Default value of Mixed_Case is used if
1991 -- for some reason we cannot find the right file name in the table.
1994 -- Get length of file name
1997 while File (Flen + 1) /= ASCII.NUL loop
2001 -- Loop through file names to find matching one. This is a bit slow,
2002 -- but we only do it in error situations so it is not so terrible.
2003 -- Note that if the loop does not exit, then the desired case will
2004 -- be left set to Mixed_Case, this can happen if the name was not
2005 -- in canonical form, and gets canonicalized on VMS. Possibly we
2006 -- could fix this by unconditinally canonicalizing these names ???
2008 for J in 1 .. Last_Source_File loop
2009 Get_Name_String (Full_Debug_Name (J));
2012 and then Name_Buffer (1 .. Name_Len) = String (File (1 .. Flen))
2014 Desired_Case := Identifier_Casing (J);
2019 -- Copy identifier as given to Name_Buffer
2021 for J in Name_Buffer'Range loop
2022 Name_Buffer (J) := Ident (J);
2024 if Name_Buffer (J) = ASCII.Nul then
2030 Set_Casing (Desired_Case);
2031 end Set_Identifier_Casing;
2033 -----------------------
2034 -- Set_Ignore_Errors --
2035 -----------------------
2037 procedure Set_Ignore_Errors (To : Boolean) is
2039 Errors_Must_Be_Ignored := To;
2040 end Set_Ignore_Errors;
2042 ------------------------------
2043 -- Set_Msg_Insertion_Column --
2044 ------------------------------
2046 procedure Set_Msg_Insertion_Column is
2048 if Style.RM_Column_Check then
2049 Set_Msg_Str (" in column ");
2050 Set_Msg_Int (Int (Error_Msg_Col) + 1);
2052 end Set_Msg_Insertion_Column;
2054 ----------------------------
2055 -- Set_Msg_Insertion_Node --
2056 ----------------------------
2058 procedure Set_Msg_Insertion_Node is
2063 Error_Msg_Node_1 = Error
2064 or else Error_Msg_Node_1 = Any_Type;
2066 if Error_Msg_Node_1 = Empty then
2067 Set_Msg_Blank_Conditional;
2068 Set_Msg_Str ("<empty>");
2070 elsif Error_Msg_Node_1 = Error then
2072 Set_Msg_Str ("<error>");
2074 elsif Error_Msg_Node_1 = Standard_Void_Type then
2076 Set_Msg_Str ("procedure name");
2079 Set_Msg_Blank_Conditional;
2083 K := Nkind (Error_Msg_Node_1);
2085 -- If we have operator case, skip quotes since name of operator
2086 -- itself will supply the required quotations. An operator can be
2087 -- an applied use in an expression or an explicit operator symbol,
2088 -- or an identifier whose name indicates it is an operator.
2091 or else K = N_Operator_Symbol
2092 or else K = N_Defining_Operator_Symbol
2093 or else ((K = N_Identifier or else K = N_Defining_Identifier)
2094 and then Is_Operator_Name (Chars (Error_Msg_Node_1)))
2096 Set_Msg_Node (Error_Msg_Node_1);
2098 -- Normal case, not an operator, surround with quotes
2102 Set_Qualification (Error_Msg_Qual_Level, Error_Msg_Node_1);
2103 Set_Msg_Node (Error_Msg_Node_1);
2108 -- The following assignment ensures that a second ampersand insertion
2109 -- character will correspond to the Error_Msg_Node_2 parameter. We
2110 -- suppress possible validity checks in case operating in -gnatVa mode,
2111 -- and Error_Msg_Node_2 is not needed and has not been set.
2114 pragma Suppress (Range_Check);
2116 Error_Msg_Node_1 := Error_Msg_Node_2;
2118 end Set_Msg_Insertion_Node;
2120 --------------------------------------
2121 -- Set_Msg_Insertion_Type_Reference --
2122 --------------------------------------
2124 procedure Set_Msg_Insertion_Type_Reference (Flag : Source_Ptr) is
2130 if Error_Msg_Node_1 = Standard_Void_Type then
2131 Set_Msg_Str ("package or procedure name");
2134 elsif Error_Msg_Node_1 = Standard_Exception_Type then
2135 Set_Msg_Str ("exception name");
2138 elsif Error_Msg_Node_1 = Any_Access
2139 or else Error_Msg_Node_1 = Any_Array
2140 or else Error_Msg_Node_1 = Any_Boolean
2141 or else Error_Msg_Node_1 = Any_Character
2142 or else Error_Msg_Node_1 = Any_Composite
2143 or else Error_Msg_Node_1 = Any_Discrete
2144 or else Error_Msg_Node_1 = Any_Fixed
2145 or else Error_Msg_Node_1 = Any_Integer
2146 or else Error_Msg_Node_1 = Any_Modular
2147 or else Error_Msg_Node_1 = Any_Numeric
2148 or else Error_Msg_Node_1 = Any_Real
2149 or else Error_Msg_Node_1 = Any_Scalar
2150 or else Error_Msg_Node_1 = Any_String
2152 Get_Unqualified_Decoded_Name_String (Chars (Error_Msg_Node_1));
2153 Set_Msg_Name_Buffer;
2156 elsif Error_Msg_Node_1 = Universal_Real then
2157 Set_Msg_Str ("type universal real");
2160 elsif Error_Msg_Node_1 = Universal_Integer then
2161 Set_Msg_Str ("type universal integer");
2164 elsif Error_Msg_Node_1 = Universal_Fixed then
2165 Set_Msg_Str ("type universal fixed");
2169 -- Special case of anonymous array
2171 if Nkind (Error_Msg_Node_1) in N_Entity
2172 and then Is_Array_Type (Error_Msg_Node_1)
2173 and then Present (Related_Array_Object (Error_Msg_Node_1))
2175 Set_Msg_Str ("type of ");
2176 Set_Msg_Node (Related_Array_Object (Error_Msg_Node_1));
2177 Set_Msg_Str (" declared");
2178 Set_Msg_Insertion_Line_Number
2179 (Sloc (Related_Array_Object (Error_Msg_Node_1)), Flag);
2183 -- If we fall through, it is not a special case, so first output
2184 -- the name of the type, preceded by private for a private type
2186 if Is_Private_Type (Error_Msg_Node_1) then
2187 Set_Msg_Str ("private type ");
2189 Set_Msg_Str ("type ");
2192 Ent := Error_Msg_Node_1;
2194 if Is_Internal_Name (Chars (Ent)) then
2195 Unwind_Internal_Type (Ent);
2198 -- Types in Standard are displayed as "Standard.name"
2200 if Sloc (Ent) <= Standard_Location then
2202 Set_Msg_Str ("Standard.");
2207 -- Types in other language defined units are displayed as
2208 -- "package-name.type-name"
2211 Is_Predefined_File_Name (Unit_File_Name (Get_Source_Unit (Ent)))
2213 Get_Unqualified_Decoded_Name_String
2214 (Unit_Name (Get_Source_Unit (Ent)));
2215 Name_Len := Name_Len - 2;
2217 Set_Casing (Mixed_Case);
2218 Set_Msg_Name_Buffer;
2220 Set_Casing (Mixed_Case);
2225 -- All other types display as "type name" defined at line xxx
2226 -- possibly qualified if qualification is requested.
2230 Set_Qualification (Error_Msg_Qual_Level, Ent);
2234 -- If Ent is an anonymous subprogram type, there is no name
2235 -- to print, so remove enclosing quotes.
2237 if Buffer_Ends_With ("""") then
2238 Buffer_Remove ("""");
2244 -- If the original type did not come from a predefined
2245 -- file, add the location where the type was defined.
2247 if Sloc (Error_Msg_Node_1) > Standard_Location
2249 not Is_Predefined_File_Name
2250 (Unit_File_Name (Get_Source_Unit (Error_Msg_Node_1)))
2252 Set_Msg_Str (" defined");
2253 Set_Msg_Insertion_Line_Number (Sloc (Error_Msg_Node_1), Flag);
2255 -- If it did come from a predefined file, deal with the case where
2256 -- this was a file with a generic instantiation from elsewhere.
2259 if Sloc (Error_Msg_Node_1) > Standard_Location then
2261 Iloc : constant Source_Ptr :=
2262 Instantiation_Location (Sloc (Error_Msg_Node_1));
2265 if Iloc /= No_Location
2266 and then not Suppress_Instance_Location
2268 Set_Msg_Str (" from instance");
2269 Set_Msg_Insertion_Line_Number (Iloc, Flag);
2274 end Set_Msg_Insertion_Type_Reference;
2276 ---------------------------------
2277 -- Set_Msg_Insertion_Unit_Name --
2278 ---------------------------------
2280 procedure Set_Msg_Insertion_Unit_Name is
2282 if Error_Msg_Unit_1 = No_Name then
2285 elsif Error_Msg_Unit_1 = Error_Name then
2287 Set_Msg_Str ("<error>");
2290 Get_Unit_Name_String (Error_Msg_Unit_1);
2293 Set_Msg_Name_Buffer;
2297 -- The following assignment ensures that a second percent insertion
2298 -- character will correspond to the Error_Msg_Unit_2 parameter. We
2299 -- suppress possible validity checks in case operating in -gnatVa mode,
2300 -- and Error_Msg_Unit_2 is not needed and has not been set.
2303 pragma Suppress (Range_Check);
2305 Error_Msg_Unit_1 := Error_Msg_Unit_2;
2307 end Set_Msg_Insertion_Unit_Name;
2313 procedure Set_Msg_Node (Node : Node_Id) is
2318 if Nkind (Node) = N_Designator then
2319 Set_Msg_Node (Name (Node));
2321 Set_Msg_Node (Identifier (Node));
2324 elsif Nkind (Node) = N_Defining_Program_Unit_Name then
2325 Set_Msg_Node (Name (Node));
2327 Set_Msg_Node (Defining_Identifier (Node));
2330 elsif Nkind (Node) = N_Selected_Component then
2331 Set_Msg_Node (Prefix (Node));
2333 Set_Msg_Node (Selector_Name (Node));
2337 -- The only remaining possibilities are identifiers, defining
2338 -- identifiers, pragmas, and pragma argument associations, i.e.
2339 -- nodes that have a Chars field.
2341 -- Internal names generally represent something gone wrong. An exception
2342 -- is the case of internal type names, where we try to find a reasonable
2343 -- external representation for the external name
2345 if Is_Internal_Name (Chars (Node))
2347 ((Is_Entity_Name (Node)
2348 and then Present (Entity (Node))
2349 and then Is_Type (Entity (Node)))
2351 (Nkind (Node) = N_Defining_Identifier and then Is_Type (Node)))
2353 if Nkind (Node) = N_Identifier then
2354 Ent := Entity (Node);
2359 -- If the type is the designated type of an access_to_subprogram,
2360 -- there is no name to provide in the call.
2362 if Ekind (Ent) = E_Subprogram_Type then
2365 Unwind_Internal_Type (Ent);
2370 Nam := Chars (Node);
2373 -- At this stage, the name to output is in Nam
2375 Get_Unqualified_Decoded_Name_String (Nam);
2377 -- Remove trailing upper case letters from the name (useful for
2378 -- dealing with some cases of internal names.
2380 while Name_Len > 1 and then Name_Buffer (Name_Len) in 'A' .. 'Z' loop
2381 Name_Len := Name_Len - 1;
2384 -- If we have any of the names from standard that start with the
2385 -- characters "any " (e.g. Any_Type), then kill the message since
2386 -- almost certainly it is a junk cascaded message.
2389 and then Name_Buffer (1 .. 4) = "any "
2391 Kill_Message := True;
2394 -- Now we have to set the proper case. If we have a source location
2395 -- then do a check to see if the name in the source is the same name
2396 -- as the name in the Names table, except for possible differences
2397 -- in case, which is the case when we can copy from the source.
2400 Src_Loc : constant Source_Ptr := Sloc (Error_Msg_Node_1);
2401 Sbuffer : Source_Buffer_Ptr;
2403 Src_Ptr : Source_Ptr;
2409 -- For standard locations, always use mixed case
2411 if Src_Loc <= No_Location
2412 or else Sloc (Node) <= No_Location
2414 Set_Casing (Mixed_Case);
2417 -- Determine if the reference we are dealing with corresponds
2418 -- to text at the point of the error reference. This will often
2419 -- be the case for simple identifier references, and is the case
2420 -- where we can copy the spelling from the source.
2422 Sbuffer := Source_Text (Get_Source_File_Index (Src_Loc));
2424 while Ref_Ptr <= Name_Len loop
2426 Fold_Lower (Sbuffer (Src_Ptr)) /=
2427 Fold_Lower (Name_Buffer (Ref_Ptr));
2428 Ref_Ptr := Ref_Ptr + 1;
2429 Src_Ptr := Src_Ptr + 1;
2432 -- If we get through the loop without a mismatch, then output
2433 -- the name the way it is spelled in the source program
2435 if Ref_Ptr > Name_Len then
2438 for J in 1 .. Name_Len loop
2439 Name_Buffer (J) := Sbuffer (Src_Ptr);
2440 Src_Ptr := Src_Ptr + 1;
2443 -- Otherwise set the casing using the default identifier casing
2446 Set_Casing (Identifier_Casing (Flag_Source), Mixed_Case);
2451 Set_Msg_Name_Buffer;
2459 procedure Set_Msg_Text (Text : String; Flag : Source_Ptr) is
2460 C : Character; -- Current character
2461 P : Natural; -- Current index;
2464 Manual_Quote_Mode := False;
2465 Is_Unconditional_Msg := False;
2467 Flag_Source := Get_Source_File_Index (Flag);
2470 while P <= Text'Last loop
2474 -- Check for insertion character
2478 Set_Msg_Insertion_Name;
2481 Set_Msg_Insertion_Unit_Name;
2484 Set_Msg_Insertion_File_Name;
2487 Set_Msg_Insertion_Type_Reference (Flag);
2490 Set_Msg_Insertion_Reserved_Name;
2493 Set_Msg_Insertion_Node;
2496 Set_Msg_Insertion_Line_Number (Error_Msg_Sloc, Flag);
2499 Continuation := True;
2501 if Text (P) = '\' then
2502 Continuation_New_Line := True;
2507 Set_Msg_Insertion_Column;
2510 Set_Msg_Insertion_Run_Time_Name;
2513 Set_Msg_Insertion_Uint;
2516 Manual_Quote_Mode := not Manual_Quote_Mode;
2520 Is_Unconditional_Msg := True;
2523 null; -- already dealt with
2526 null; -- already dealt with
2529 null; -- already dealt with
2532 Set_Msg_Char (Text (P));
2536 Set_Msg_Str (Error_Msg_String (1 .. Error_Msg_Strlen));
2538 -- Upper case letter
2542 -- Start of reserved word if two or more
2544 if P <= Text'Last and then Text (P) in 'A' .. 'Z' then
2546 Set_Msg_Insertion_Reserved_Word (Text, P);
2548 -- Single upper case letter is just inserted
2554 -- Normal character with no special treatment
2568 procedure Set_Posted (N : Node_Id) is
2572 if Is_Serious_Error then
2574 -- We always set Error_Posted on the node itself
2576 Set_Error_Posted (N);
2578 -- If it is a subexpression, then set Error_Posted on parents
2579 -- up to and including the first non-subexpression construct. This
2580 -- helps avoid cascaded error messages within a single expression.
2586 Set_Error_Posted (P);
2587 exit when Nkind (P) not in N_Subexpr;
2590 -- A special check, if we just posted an error on an attribute
2591 -- definition clause, then also set the entity involved as posted.
2592 -- For example, this stops complaining about the alignment after
2593 -- complaining about the size, which is likely to be useless.
2595 if Nkind (P) = N_Attribute_Definition_Clause then
2596 if Is_Entity_Name (Name (P)) then
2597 Set_Error_Posted (Entity (Name (P)));
2603 -----------------------
2604 -- Set_Qualification --
2605 -----------------------
2607 procedure Set_Qualification (N : Nat; E : Entity_Id) is
2609 if N /= 0 and then Scope (E) /= Standard_Standard then
2610 Set_Qualification (N - 1, Scope (E));
2611 Set_Msg_Node (Scope (E));
2614 end Set_Qualification;
2616 ------------------------
2617 -- Special_Msg_Delete --
2618 ------------------------
2620 function Special_Msg_Delete
2622 N : Node_Or_Entity_Id;
2623 E : Node_Or_Entity_Id) return Boolean
2626 -- Never delete messages in -gnatdO mode
2628 if Debug_Flag_OO then
2631 -- When an atomic object refers to a non-atomic type in the same
2632 -- scope, we implicitly make the type atomic. In the non-error
2633 -- case this is surely safe (and in fact prevents an error from
2634 -- occurring if the type is not atomic by default). But if the
2635 -- object cannot be made atomic, then we introduce an extra junk
2636 -- message by this manipulation, which we get rid of here.
2638 -- We identify this case by the fact that it references a type for
2639 -- which Is_Atomic is set, but there is no Atomic pragma setting it.
2641 elsif Msg = "atomic access to & cannot be guaranteed"
2642 and then Is_Type (E)
2643 and then Is_Atomic (E)
2644 and then No (Get_Rep_Pragma (E, Name_Atomic))
2648 -- When a size is wrong for a frozen type there is no explicit
2649 -- size clause, and other errors have occurred, suppress the
2650 -- message, since it is likely that this size error is a cascaded
2651 -- result of other errors. The reason we eliminate unfrozen types
2652 -- is that messages issued before the freeze type are for sure OK.
2654 elsif Msg = "size for& too small, minimum allowed is ^"
2655 and then Is_Frozen (E)
2656 and then Serious_Errors_Detected > 0
2657 and then Nkind (N) /= N_Component_Clause
2658 and then Nkind (Parent (N)) /= N_Component_Clause
2660 No (Get_Attribute_Definition_Clause (E, Attribute_Size))
2662 No (Get_Attribute_Definition_Clause (E, Attribute_Object_Size))
2664 No (Get_Attribute_Definition_Clause (E, Attribute_Value_Size))
2668 -- All special tests complete, so go ahead with message
2673 end Special_Msg_Delete;
2675 --------------------------
2676 -- Unwind_Internal_Type --
2677 --------------------------
2679 procedure Unwind_Internal_Type (Ent : in out Entity_Id) is
2680 Derived : Boolean := False;
2682 Old_Ent : Entity_Id;
2685 -- Undo placement of a quote, since we will put it back later
2687 Mchar := Msg_Buffer (Msglen);
2690 Msglen := Msglen - 1;
2693 -- The loop here deals with recursive types, we are trying to
2694 -- find a related entity that is not an implicit type. Note
2695 -- that the check with Old_Ent stops us from getting "stuck".
2696 -- Also, we don't output the "type derived from" message more
2697 -- than once in the case where we climb up multiple levels.
2702 -- Implicit access type, use directly designated type
2703 -- In Ada 2005, the designated type may be an anonymous access to
2704 -- subprogram, in which case we can only point to its definition.
2706 if Is_Access_Type (Ent) then
2707 if Ekind (Ent) = E_Access_Subprogram_Type
2708 or else Ekind (Ent) = E_Anonymous_Access_Subprogram_Type
2709 or else Ekind (Ent) = E_Access_Protected_Subprogram_Type
2711 Ent := Directly_Designated_Type (Ent);
2713 if not Comes_From_Source (Ent) then
2714 if Buffer_Ends_With ("type ") then
2715 Buffer_Remove ("type ");
2718 Set_Msg_Str ("access to subprogram with profile ");
2720 elsif Ekind (Ent) = E_Function then
2721 Set_Msg_Str ("access to function ");
2723 Set_Msg_Str ("access to procedure ");
2727 -- Type is access to object, named or anonymous
2730 Set_Msg_Str ("access to ");
2731 Ent := Directly_Designated_Type (Ent);
2736 elsif Is_Class_Wide_Type (Ent) then
2738 Ent := Root_Type (Ent);
2740 -- Use base type if this is a subtype
2742 elsif Ent /= Base_Type (Ent) then
2743 Buffer_Remove ("type ");
2745 -- Avoid duplication "subtype of subtype of", and also replace
2746 -- "derived from subtype of" simply by "derived from"
2748 if not Buffer_Ends_With ("subtype of ")
2749 and then not Buffer_Ends_With ("derived from ")
2751 Set_Msg_Str ("subtype of ");
2754 Ent := Base_Type (Ent);
2756 -- If this is a base type with a first named subtype, use the
2757 -- first named subtype instead. This is not quite accurate in
2758 -- all cases, but it makes too much noise to be accurate and
2759 -- add 'Base in all cases. Note that we only do this is the
2760 -- first named subtype is not itself an internal name. This
2761 -- avoids the obvious loop (subtype->basetype->subtype) which
2762 -- would otherwise occur!)
2764 elsif Present (Freeze_Node (Ent))
2765 and then Present (First_Subtype_Link (Freeze_Node (Ent)))
2767 not Is_Internal_Name
2768 (Chars (First_Subtype_Link (Freeze_Node (Ent))))
2770 Ent := First_Subtype_Link (Freeze_Node (Ent));
2772 -- Otherwise use root type
2776 Buffer_Remove ("type ");
2778 -- Test for "subtype of type derived from" which seems
2779 -- excessive and is replaced by simply "type derived from"
2781 Buffer_Remove ("subtype of");
2783 -- Avoid duplication "type derived from type derived from"
2785 if not Buffer_Ends_With ("type derived from ") then
2786 Set_Msg_Str ("type derived from ");
2795 -- If we are stuck in a loop, get out and settle for the internal
2796 -- name after all. In this case we set to kill the message if it
2797 -- is not the first error message (we really try hard not to show
2798 -- the dirty laundry of the implementation to the poor user!)
2800 if Ent = Old_Ent then
2801 Kill_Message := True;
2805 -- Get out if we finally found a non-internal name to use
2807 exit when not Is_Internal_Name (Chars (Ent));
2813 end Unwind_Internal_Type;
2819 procedure VMS_Convert is
2829 P := Msg_Buffer'First;
2835 if Msg_Buffer (P) = '-' then
2836 for G in Gnames'Range loop
2837 L := Gnames (G)'Length;
2839 -- See if we have "-ggg switch", where ggg is Gnames entry
2841 if P + L + 7 <= Msglen
2842 and then Msg_Buffer (P + 1 .. P + L) = Gnames (G).all
2843 and then Msg_Buffer (P + L + 1 .. P + L + 7) = " switch"
2845 -- Replace by "/vvv qualifier", where vvv is Vnames entry
2847 N := Vnames (G)'Length;
2848 Msg_Buffer (P + N + 11 .. Msglen + N - L + 3) :=
2849 Msg_Buffer (P + L + 8 .. Msglen);
2850 Msg_Buffer (P) := '/';
2851 Msg_Buffer (P + 1 .. P + N) := Vnames (G).all;
2852 Msg_Buffer (P + N + 1 .. P + N + 10) := " qualifier";
2854 Msglen := Msglen + N - L + 3;