1 ------------------------------------------------------------------------------
3 -- GNAT COMPILER COMPONENTS --
9 -- Copyright (C) 1992-2012, 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, Msglen, Is_Style_Msg, Is_Warning_Msg, and
157 -- Is_Unconditional_Msg are set on return.
159 procedure Set_Posted (N : Node_Id);
160 -- Sets the Error_Posted flag on the given node, and all its parents
161 -- that are subexpressions and then on the parent non-subexpression
162 -- construct that contains the original expression (this reduces the
163 -- number of cascaded messages). Note that this call only has an effect
164 -- for a serious error. For a non-serious error, it has no effect.
166 procedure Set_Qualification (N : Nat; E : Entity_Id);
167 -- Outputs up to N levels of qualification for the given entity. For
168 -- example, the entity A.B.C.D will output B.C. if N = 2.
170 function Special_Msg_Delete
172 N : Node_Or_Entity_Id;
173 E : Node_Or_Entity_Id) return Boolean;
174 -- This function is called from Error_Msg_NEL, passing the message Msg,
175 -- node N on which the error is to be posted, and the entity or node E
176 -- to be used for an & insertion in the message if any. The job of this
177 -- procedure is to test for certain cascaded messages that we would like
178 -- to suppress. If the message is to be suppressed then we return True.
179 -- If the message should be generated (the normal case) False is returned.
181 procedure Unwind_Internal_Type (Ent : in out Entity_Id);
182 -- This procedure is given an entity id for an internal type, i.e. a type
183 -- with an internal name. It unwinds the type to try to get to something
184 -- reasonably printable, generating prefixes like "subtype of", "access
185 -- to", etc along the way in the buffer. The value in Ent on return is the
186 -- final name to be printed. Hopefully this is not an internal name, but in
187 -- some internal name cases, it is an internal name, and has to be printed
188 -- anyway (although in this case the message has been killed if possible).
189 -- The global variable Class_Flag is set to True if the resulting entity
190 -- should have 'Class appended to its name (see Add_Class procedure), and
191 -- is otherwise unchanged.
193 procedure VMS_Convert;
194 -- This procedure has no effect if called when the host is not OpenVMS. If
195 -- the host is indeed OpenVMS, then the error message stored in Msg_Buffer
196 -- is scanned for appearances of switch names which need converting to
197 -- corresponding VMS qualifier names. See Gnames/Vnames table in Errout
198 -- spec for precise definition of the conversion that is performed by this
199 -- routine in OpenVMS mode.
201 -----------------------
202 -- Change_Error_Text --
203 -----------------------
205 procedure Change_Error_Text (Error_Id : Error_Msg_Id; New_Msg : String) is
206 Save_Next : Error_Msg_Id;
207 Err_Id : Error_Msg_Id := Error_Id;
210 Set_Msg_Text (New_Msg, Errors.Table (Error_Id).Sptr);
211 Errors.Table (Error_Id).Text := new String'(Msg_Buffer (1 .. Msglen));
213 -- If in immediate error message mode, output modified error message now
214 -- This is just a bit tricky, because we want to output just a single
215 -- message, and the messages we modified is already linked in. We solve
216 -- this by temporarily resetting its forward pointer to empty.
218 if Debug_Flag_OO then
219 Save_Next := Errors.Table (Error_Id).Next;
220 Errors.Table (Error_Id).Next := No_Error_Msg;
223 (Errors.Table (Error_Id).Line, Errors.Table (Error_Id).Sfile, True);
224 Output_Error_Msgs (Err_Id);
225 Errors.Table (Error_Id).Next := Save_Next;
227 end Change_Error_Text;
229 ------------------------
230 -- Compilation_Errors --
231 ------------------------
233 function Compilation_Errors return Boolean is
235 if not Finalize_Called then
238 return Erroutc.Compilation_Errors;
240 end Compilation_Errors;
246 -- Error_Msg posts a flag at the given location, except that if the
247 -- Flag_Location points within a generic template and corresponds to an
248 -- instantiation of this generic template, then the actual message will be
249 -- posted on the generic instantiation, along with additional messages
250 -- referencing the generic declaration.
252 procedure Error_Msg (Msg : String; Flag_Location : Source_Ptr) is
253 Sindex : Source_File_Index;
254 -- Source index for flag location
256 Orig_Loc : Source_Ptr;
257 -- Original location of Flag_Location (i.e. location in original
258 -- template in instantiation case, otherwise unchanged).
261 -- It is a fatal error to issue an error message when scanning from the
262 -- internal source buffer (see Sinput for further documentation)
264 pragma Assert (Sinput.Source /= Internal_Source_Ptr);
266 -- Return if all errors are to be ignored
268 if Errors_Must_Be_Ignored then
272 -- If we already have messages, and we are trying to place a message at
273 -- No_Location or in package Standard, then just ignore the attempt
274 -- since we assume that what is happening is some cascaded junk. Note
275 -- that this is safe in the sense that proceeding will surely bomb.
277 if Flag_Location < First_Source_Ptr
278 and then Total_Errors_Detected > 0
283 -- Start of processing for new message
285 Sindex := Get_Source_File_Index (Flag_Location);
286 Test_Style_Warning_Serious_Msg (Msg);
287 Orig_Loc := Original_Location (Flag_Location);
289 -- If the current location is in an instantiation, the issue arises of
290 -- whether to post the message on the template or the instantiation.
292 -- The way we decide is to see if we have posted the same message on
293 -- the template when we compiled the template (the template is always
294 -- compiled before any instantiations). For this purpose, we use a
295 -- separate table of messages. The reason we do this is twofold:
297 -- First, the messages can get changed by various processing
298 -- including the insertion of tokens etc, making it hard to
299 -- do the comparison.
301 -- Second, we will suppress a warning on a template if it is not in
302 -- the current extended source unit. That's reasonable and means we
303 -- don't want the warning on the instantiation here either, but it
304 -- does mean that the main error table would not in any case include
307 if Flag_Location = Orig_Loc then
308 Non_Instance_Msgs.Append ((new String'(Msg), Flag_Location));
309 Warn_On_Instance := False;
311 -- Here we have an instance message
314 -- Delete if debug flag off, and this message duplicates a message
315 -- already posted on the corresponding template
317 if not Debug_Flag_GG then
318 for J in Non_Instance_Msgs.First .. Non_Instance_Msgs.Last loop
319 if Msg = Non_Instance_Msgs.Table (J).Msg.all
320 and then Non_Instance_Msgs.Table (J).Loc = Orig_Loc
327 -- No duplicate, so error/warning will be posted on instance
329 Warn_On_Instance := Is_Warning_Msg;
332 -- Ignore warning message that is suppressed for this location. Note
333 -- that style checks are not considered warning messages for this
336 if Is_Warning_Msg and then Warnings_Suppressed (Orig_Loc) then
339 -- For style messages, check too many messages so far
342 and then Maximum_Messages /= 0
343 and then Warnings_Detected >= Maximum_Messages
348 -- The idea at this stage is that we have two kinds of messages
350 -- First, we have those messages that are to be placed as requested at
351 -- Flag_Location. This includes messages that have nothing to do with
352 -- generics, and also messages placed on generic templates that reflect
353 -- an error in the template itself. For such messages we simply call
354 -- Error_Msg_Internal to place the message in the requested location.
356 if Instantiation (Sindex) = No_Location then
357 Error_Msg_Internal (Msg, Flag_Location, Flag_Location, False);
361 -- If we are trying to flag an error in an instantiation, we may have
362 -- a generic contract violation. What we generate in this case is:
364 -- instantiation error at ...
365 -- original error message
369 -- warning: in instantiation at
370 -- warning: original warning message
372 -- All these messages are posted at the location of the top level
373 -- instantiation. If there are nested instantiations, then the
374 -- instantiation error message can be repeated, pointing to each
375 -- of the relevant instantiations.
377 -- Note: the instantiation mechanism is also shared for inlining of
378 -- subprogram bodies when front end inlining is done. In this case the
379 -- messages have the form:
381 -- in inlined body at ...
382 -- original error message
386 -- warning: in inlined body at
387 -- warning: original warning message
389 -- OK, here we have an instantiation error, and we need to generate the
390 -- error on the instantiation, rather than on the template.
393 Actual_Error_Loc : Source_Ptr;
394 -- Location of outer level instantiation in instantiation case, or
395 -- just a copy of Flag_Location in the normal case. This is the
396 -- location where all error messages will actually be posted.
398 Save_Error_Msg_Sloc : constant Source_Ptr := Error_Msg_Sloc;
399 -- Save possible location set for caller's message. We need to use
400 -- Error_Msg_Sloc for the location of the instantiation error but we
401 -- have to preserve a possible original value.
403 X : Source_File_Index;
405 Msg_Cont_Status : Boolean;
406 -- Used to label continuation lines in instantiation case with
407 -- proper Msg_Cont status.
410 -- Loop to find highest level instantiation, where all error
411 -- messages will be placed.
415 Actual_Error_Loc := Instantiation (X);
416 X := Get_Source_File_Index (Actual_Error_Loc);
417 exit when Instantiation (X) = No_Location;
420 -- Since we are generating the messages at the instantiation point in
421 -- any case, we do not want the references to the bad lines in the
422 -- instance to be annotated with the location of the instantiation.
424 Suppress_Instance_Location := True;
425 Msg_Cont_Status := False;
427 -- Loop to generate instantiation messages
429 Error_Msg_Sloc := Flag_Location;
430 X := Get_Source_File_Index (Flag_Location);
431 while Instantiation (X) /= No_Location loop
433 -- Suppress instantiation message on continuation lines
435 if Msg (Msg'First) /= '\' then
437 -- Case of inlined body
439 if Inlined_Body (X) then
440 if Is_Warning_Msg or else Is_Style_Msg then
442 ("?in inlined body #",
443 Actual_Error_Loc, Flag_Location, Msg_Cont_Status);
446 ("error in inlined body #",
447 Actual_Error_Loc, Flag_Location, Msg_Cont_Status);
450 -- Case of generic instantiation
453 if Is_Warning_Msg or else Is_Style_Msg then
455 ("?in instantiation #",
456 Actual_Error_Loc, Flag_Location, Msg_Cont_Status);
459 ("instantiation error #",
460 Actual_Error_Loc, Flag_Location, Msg_Cont_Status);
465 Error_Msg_Sloc := Instantiation (X);
466 X := Get_Source_File_Index (Error_Msg_Sloc);
467 Msg_Cont_Status := True;
470 Suppress_Instance_Location := False;
471 Error_Msg_Sloc := Save_Error_Msg_Sloc;
473 -- Here we output the original message on the outer instantiation
476 (Msg, Actual_Error_Loc, Flag_Location, Msg_Cont_Status);
484 procedure Error_Msg_AP (Msg : String) is
489 -- If we had saved the Scan_Ptr value after scanning the previous
490 -- token, then we would have exactly the right place for putting
491 -- the flag immediately at hand. However, that would add at least
492 -- two instructions to a Scan call *just* to service the possibility
493 -- of an Error_Msg_AP call. So instead we reconstruct that value.
495 -- We have two possibilities, start with Prev_Token_Ptr and skip over
496 -- the current token, which is made harder by the possibility that this
497 -- token may be in error, or start with Token_Ptr and work backwards.
498 -- We used to take the second approach, but it's hard because of
499 -- comments, and harder still because things that look like comments
500 -- can appear inside strings. So now we take the first approach.
502 -- Note: in the case where there is no previous token, Prev_Token_Ptr
503 -- is set to Source_First, which is a reasonable position for the
504 -- error flag in this situation.
506 S1 := Prev_Token_Ptr;
509 -- If the previous token is a string literal, we need a special approach
510 -- since there may be white space inside the literal and we don't want
511 -- to stop on that white space.
513 -- Note: since this is an error recovery issue anyway, it is not worth
514 -- worrying about special UTF_32 line terminator characters here.
516 if Prev_Token = Tok_String_Literal then
520 if Source (S1) = C then
522 exit when Source (S1) /= C;
523 elsif Source (S1) in Line_Terminator then
528 -- Character literal also needs special handling
530 elsif Prev_Token = Tok_Char_Literal then
533 -- Otherwise we search forward for the end of the current token, marked
534 -- by a line terminator, white space, a comment symbol or if we bump
535 -- into the following token (i.e. the current token).
537 -- Again, it is not worth worrying about UTF_32 special line terminator
538 -- characters in this context, since this is only for error recovery.
541 while Source (S1) not in Line_Terminator
542 and then Source (S1) /= ' '
543 and then Source (S1) /= ASCII.HT
544 and then (Source (S1) /= '-' or else Source (S1 + 1) /= '-')
545 and then S1 /= Token_Ptr
551 -- S1 is now set to the location for the flag
560 procedure Error_Msg_BC (Msg : String) is
562 -- If we are at end of file, post the flag after the previous token
564 if Token = Tok_EOF then
567 -- If we are at start of file, post the flag at the current token
569 elsif Token_Ptr = Source_First (Current_Source_File) then
572 -- If the character before the current token is a space or a horizontal
573 -- tab, then we place the flag on this character (in the case of a tab
574 -- we would really like to place it in the "last" character of the tab
575 -- space, but that it too much trouble to worry about).
577 elsif Source (Token_Ptr - 1) = ' '
578 or else Source (Token_Ptr - 1) = ASCII.HT
580 Error_Msg (Msg, Token_Ptr - 1);
582 -- If there is no space or tab before the current token, then there is
583 -- no room to place the flag before the token, so we place it on the
584 -- token instead (this happens for example at the start of a line).
587 Error_Msg (Msg, Token_Ptr);
595 procedure Error_Msg_CRT (Feature : String; N : Node_Id) is
596 CNRT : constant String := " not allowed in no run time mode";
597 CCRT : constant String := " not supported by configuration>";
599 S : String (1 .. Feature'Length + 1 + CCRT'Length);
604 S (2 .. Feature'Length + 1) := Feature;
605 L := Feature'Length + 2;
607 if No_Run_Time_Mode then
608 S (L .. L + CNRT'Length - 1) := CNRT;
609 L := L + CNRT'Length - 1;
611 else pragma Assert (Configurable_Run_Time_Mode);
612 S (L .. L + CCRT'Length - 1) := CCRT;
613 L := L + CCRT'Length - 1;
616 Error_Msg_N (S (1 .. L), N);
617 Configurable_Run_Time_Violations := Configurable_Run_Time_Violations + 1;
624 procedure Error_Msg_PT (Typ : Node_Id; Subp : Node_Id) is
626 -- Error message below needs rewording (remember comma in -gnatj
630 ("first formal of & must be of mode `OUT`, `IN OUT` or " &
631 "access-to-variable", Typ, Subp);
633 ("\in order to be overridden by protected procedure or entry " &
634 "(RM 9.4(11.9/2))", Typ);
641 procedure Error_Msg_F (Msg : String; N : Node_Id) is
643 Error_Msg_NEL (Msg, N, N, Sloc (First_Node (N)));
650 procedure Error_Msg_FE
653 E : Node_Or_Entity_Id)
656 Error_Msg_NEL (Msg, N, E, Sloc (First_Node (N)));
659 ------------------------
660 -- Error_Msg_Internal --
661 ------------------------
663 procedure Error_Msg_Internal
669 Next_Msg : Error_Msg_Id;
670 -- Pointer to next message at insertion point
672 Prev_Msg : Error_Msg_Id;
673 -- Pointer to previous message at insertion point
675 Temp_Msg : Error_Msg_Id;
677 procedure Handle_Serious_Error;
678 -- Internal procedure to do all error message handling for a serious
679 -- error message, other than bumping the error counts and arranging
680 -- for the message to be output.
682 --------------------------
683 -- Handle_Serious_Error --
684 --------------------------
686 procedure Handle_Serious_Error is
688 -- Turn off code generation if not done already
690 if Operating_Mode = Generate_Code then
691 Operating_Mode := Check_Semantics;
692 Expander_Active := False;
695 -- Set the fatal error flag in the unit table unless we are in
696 -- Try_Semantics mode. This stops the semantics from being performed
697 -- if we find a serious error. This is skipped if we are currently
698 -- dealing with the configuration pragma file.
700 if not Try_Semantics and then Current_Source_Unit /= No_Unit then
701 Set_Fatal_Error (Get_Source_Unit (Sptr));
703 end Handle_Serious_Error;
705 -- Start of processing for Error_Msg_Internal
708 if Raise_Exception_On_Error /= 0 then
709 raise Error_Msg_Exception;
712 Continuation := Msg_Cont;
713 Continuation_New_Line := False;
714 Suppress_Message := False;
715 Kill_Message := False;
716 Set_Msg_Text (Msg, Sptr);
718 -- Kill continuation if parent message killed
720 if Continuation and Last_Killed then
724 -- Return without doing anything if message is suppressed
727 and then not All_Errors_Mode
728 and then not Is_Warning_Msg
729 and then Msg (Msg'Last) /= '!'
731 if not Continuation then
738 -- Return without doing anything if message is killed and this is not
739 -- the first error message. The philosophy is that if we get a weird
740 -- error message and we already have had a message, then we hope the
741 -- weird message is a junk cascaded message
744 and then not All_Errors_Mode
745 and then Total_Errors_Detected /= 0
747 if not Continuation then
754 -- Special check for warning message to see if it should be output
756 if Is_Warning_Msg then
758 -- Immediate return if warning message and warnings are suppressed
760 if Warnings_Suppressed (Optr) or else Warnings_Suppressed (Sptr) then
761 Cur_Msg := No_Error_Msg;
765 -- If the flag location is in the main extended source unit then for
766 -- sure we want the warning since it definitely belongs
768 if In_Extended_Main_Source_Unit (Sptr) then
771 -- If the main unit has not been read yet. the warning must be on
772 -- a configuration file: gnat.adc or user-defined. This means we
773 -- are not parsing the main unit yet, so skip following checks.
775 elsif No (Cunit (Main_Unit)) then
778 -- If the flag location is not in the main extended source unit, then
779 -- we want to eliminate the warning, unless it is in the extended
780 -- main code unit and we want warnings on the instance.
782 elsif In_Extended_Main_Code_Unit (Sptr) and then Warn_On_Instance then
785 -- Keep warning if debug flag G set
787 elsif Debug_Flag_GG then
790 -- Keep warning if message text ends in !!
792 elsif Msg (Msg'Last) = '!' and then Msg (Msg'Last - 1) = '!' then
795 -- Here is where we delete a warning from a with'ed unit
798 Cur_Msg := No_Error_Msg;
800 if not Continuation then
808 -- If message is to be ignored in special ignore message mode, this is
809 -- where we do this special processing, bypassing message output.
811 if Ignore_Errors_Enable > 0 then
812 if Is_Serious_Error then
813 Handle_Serious_Error;
819 -- If error message line length set, and this is a continuation message
820 -- then all we do is to append the text to the text of the last message
821 -- with a comma space separator (eliminating a possible (style) or
824 if Error_Msg_Line_Length /= 0
825 and then Continuation
827 Cur_Msg := Errors.Last;
830 Oldm : String_Ptr := Errors.Table (Cur_Msg).Text;
831 Newm : String (1 .. Oldm'Last + 2 + Msglen);
836 -- First copy old message to new one and free it
838 Newm (Oldm'Range) := Oldm.all;
842 -- Remove (style) or info: at start of message
844 if Msglen > 8 and then Msg_Buffer (1 .. 8) = "(style) " then
847 elsif Msglen > 6 and then Msg_Buffer (1 .. 6) = "info: " then
854 -- Now deal with separation between messages. Normally this is
855 -- simply comma space, but there are some special cases.
857 -- If continuation new line, then put actual NL character in msg
859 if Continuation_New_Line then
861 Newm (Newl) := ASCII.LF;
863 -- If continuation message is enclosed in parentheses, then
864 -- special treatment (don't need a comma, and we want to combine
865 -- successive parenthetical remarks into a single one with
866 -- separating commas).
868 elsif Msg_Buffer (M) = '(' and then Msg_Buffer (Msglen) = ')' then
870 -- Case where existing message ends in right paren, remove
871 -- and separate parenthetical remarks with a comma.
873 if Newm (Newl) = ')' then
875 Msg_Buffer (M) := ' ';
877 -- Case where we are adding new parenthetical comment
884 -- Case where continuation not in parens and no new line
887 Newm (Newl + 1 .. Newl + 2) := ", ";
891 -- Append new message
893 Newm (Newl + 1 .. Newl + Msglen - M + 1) :=
894 Msg_Buffer (M .. Msglen);
895 Newl := Newl + Msglen - M + 1;
896 Errors.Table (Cur_Msg).Text := new String'(Newm (1 .. Newl));
902 -- Otherwise build error message object for new message
905 ((Text => new String'(Msg_Buffer (1 .. Msglen)),
906 Next => No_Error_Msg,
907 Prev => No_Error_Msg,
910 Sfile => Get_Source_File_Index (Sptr),
911 Line => Get_Physical_Line_Number (Sptr),
912 Col => Get_Column_Number (Sptr),
913 Warn => Is_Warning_Msg,
914 Style => Is_Style_Msg,
915 Serious => Is_Serious_Error,
916 Uncond => Is_Unconditional_Msg,
917 Msg_Cont => Continuation,
919 Cur_Msg := Errors.Last;
921 -- If immediate errors mode set, output error message now. Also output
922 -- now if the -d1 debug flag is set (so node number message comes out
923 -- just before actual error message)
925 if Debug_Flag_OO or else Debug_Flag_1 then
928 (Errors.Table (Cur_Msg).Line, Errors.Table (Cur_Msg).Sfile, True);
930 Output_Error_Msgs (Temp_Msg);
932 -- If not in immediate errors mode, then we insert the message in the
933 -- error chain for later output by Finalize. The messages are sorted
934 -- first by unit (main unit comes first), and within a unit by source
935 -- location (earlier flag location first in the chain).
938 -- First a quick check, does this belong at the very end of the chain
939 -- of error messages. This saves a lot of time in the normal case if
940 -- there are lots of messages.
942 if Last_Error_Msg /= No_Error_Msg
943 and then Errors.Table (Cur_Msg).Sfile =
944 Errors.Table (Last_Error_Msg).Sfile
945 and then (Sptr > Errors.Table (Last_Error_Msg).Sptr
947 (Sptr = Errors.Table (Last_Error_Msg).Sptr
949 Optr > Errors.Table (Last_Error_Msg).Optr))
951 Prev_Msg := Last_Error_Msg;
952 Next_Msg := No_Error_Msg;
954 -- Otherwise do a full sequential search for the insertion point
957 Prev_Msg := No_Error_Msg;
958 Next_Msg := First_Error_Msg;
959 while Next_Msg /= No_Error_Msg loop
961 Errors.Table (Cur_Msg).Sfile < Errors.Table (Next_Msg).Sfile;
963 if Errors.Table (Cur_Msg).Sfile =
964 Errors.Table (Next_Msg).Sfile
966 exit when Sptr < Errors.Table (Next_Msg).Sptr
968 (Sptr = Errors.Table (Next_Msg).Sptr
970 Optr < Errors.Table (Next_Msg).Optr);
973 Prev_Msg := Next_Msg;
974 Next_Msg := Errors.Table (Next_Msg).Next;
978 -- Now we insert the new message in the error chain. The insertion
979 -- point for the message is after Prev_Msg and before Next_Msg.
981 -- The possible insertion point for the new message is after Prev_Msg
982 -- and before Next_Msg. However, this is where we do a special check
983 -- for redundant parsing messages, defined as messages posted on the
984 -- same line. The idea here is that probably such messages are junk
985 -- from the parser recovering. In full errors mode, we don't do this
986 -- deletion, but otherwise such messages are discarded at this stage.
988 if Prev_Msg /= No_Error_Msg
989 and then Errors.Table (Prev_Msg).Line =
990 Errors.Table (Cur_Msg).Line
991 and then Errors.Table (Prev_Msg).Sfile =
992 Errors.Table (Cur_Msg).Sfile
993 and then Compiler_State = Parsing
994 and then not All_Errors_Mode
996 -- Don't delete unconditional messages and at this stage, don't
997 -- delete continuation lines (we attempted to delete those earlier
998 -- if the parent message was deleted.
1000 if not Errors.Table (Cur_Msg).Uncond
1001 and then not Continuation
1003 -- Don't delete if prev msg is warning and new msg is an error.
1004 -- This is because we don't want a real error masked by a
1005 -- warning. In all other cases (that is parse errors for the
1006 -- same line that are not unconditional) we do delete the
1007 -- message. This helps to avoid junk extra messages from
1008 -- cascaded parsing errors
1010 if not (Errors.Table (Prev_Msg).Warn
1012 Errors.Table (Prev_Msg).Style)
1014 (Errors.Table (Cur_Msg).Warn
1016 Errors.Table (Cur_Msg).Style)
1018 -- All tests passed, delete the message by simply returning
1019 -- without any further processing.
1021 if not Continuation then
1022 Last_Killed := True;
1030 -- Come here if message is to be inserted in the error chain
1032 if not Continuation then
1033 Last_Killed := False;
1036 if Prev_Msg = No_Error_Msg then
1037 First_Error_Msg := Cur_Msg;
1039 Errors.Table (Prev_Msg).Next := Cur_Msg;
1042 Errors.Table (Cur_Msg).Next := Next_Msg;
1044 if Next_Msg = No_Error_Msg then
1045 Last_Error_Msg := Cur_Msg;
1049 -- Bump appropriate statistics count
1051 if Errors.Table (Cur_Msg).Warn or else Errors.Table (Cur_Msg).Style then
1052 Warnings_Detected := Warnings_Detected + 1;
1055 Total_Errors_Detected := Total_Errors_Detected + 1;
1057 if Errors.Table (Cur_Msg).Serious then
1058 Serious_Errors_Detected := Serious_Errors_Detected + 1;
1059 Handle_Serious_Error;
1063 -- If too many warnings turn off warnings
1065 if Maximum_Messages /= 0 then
1066 if Warnings_Detected = Maximum_Messages then
1067 Warning_Mode := Suppress;
1070 -- If too many errors abandon compilation
1072 if Total_Errors_Detected = Maximum_Messages then
1073 raise Unrecoverable_Error;
1076 end Error_Msg_Internal;
1082 procedure Error_Msg_N (Msg : String; N : Node_Or_Entity_Id) is
1084 Error_Msg_NEL (Msg, N, N, Sloc (N));
1091 procedure Error_Msg_NE
1093 N : Node_Or_Entity_Id;
1094 E : Node_Or_Entity_Id)
1097 Error_Msg_NEL (Msg, N, E, Sloc (N));
1104 procedure Error_Msg_NEL
1106 N : Node_Or_Entity_Id;
1107 E : Node_Or_Entity_Id;
1108 Flag_Location : Source_Ptr)
1111 if Special_Msg_Delete (Msg, N, E) then
1115 Test_Style_Warning_Serious_Msg (Msg);
1117 -- Special handling for warning messages
1119 if Is_Warning_Msg then
1121 -- Suppress if no warnings set for either entity or node
1123 if No_Warnings (N) or else No_Warnings (E) then
1125 -- Disable any continuation messages as well
1127 Last_Killed := True;
1131 -- Suppress if inside loop that is known to be null or is probably
1132 -- null (case where loop executes only if invalid values present).
1133 -- In either case warnings in the loop are likely to be junk.
1140 while Present (P) loop
1141 if Nkind (P) = N_Loop_Statement
1142 and then Suppress_Loop_Warnings (P)
1152 -- Test for message to be output
1155 or else Msg (Msg'Last) = '!'
1156 or else Is_Warning_Msg
1158 or else (Msg (Msg'First) = '\' and then not Last_Killed)
1161 Error_Msg_Node_1 := E;
1162 Error_Msg (Msg, Flag_Location);
1165 Last_Killed := True;
1168 if not (Is_Warning_Msg or Is_Style_Msg) then
1177 procedure Error_Msg_NW
1180 N : Node_Or_Entity_Id)
1184 and then In_Extended_Main_Source_Unit (N)
1185 and then Comes_From_Source (N)
1187 Error_Msg_NEL (Msg, N, N, Sloc (N));
1195 procedure Error_Msg_S (Msg : String) is
1197 Error_Msg (Msg, Scan_Ptr);
1204 procedure Error_Msg_SC (Msg : String) is
1206 -- If we are at end of file, post the flag after the previous token
1208 if Token = Tok_EOF then
1211 -- For all other cases the message is posted at the current token
1215 Error_Msg (Msg, Token_Ptr);
1223 procedure Error_Msg_SP (Msg : String) is
1225 -- Note: in the case where there is no previous token, Prev_Token_Ptr
1226 -- is set to Source_First, which is a reasonable position for the
1227 -- error flag in this situation
1229 Error_Msg (Msg, Prev_Token_Ptr);
1236 procedure Finalize (Last_Call : Boolean) is
1241 procedure Delete_Warning (E : Error_Msg_Id);
1242 -- Delete a message if not already deleted and adjust warning count
1244 --------------------
1245 -- Delete_Warning --
1246 --------------------
1248 procedure Delete_Warning (E : Error_Msg_Id) is
1250 if not Errors.Table (E).Deleted then
1251 Errors.Table (E).Deleted := True;
1252 Warnings_Detected := Warnings_Detected - 1;
1256 -- Start of message for Finalize
1259 -- Set Prev pointers
1261 Cur := First_Error_Msg;
1262 while Cur /= No_Error_Msg loop
1263 Nxt := Errors.Table (Cur).Next;
1264 exit when Nxt = No_Error_Msg;
1265 Errors.Table (Nxt).Prev := Cur;
1269 -- Eliminate any duplicated error messages from the list. This is
1270 -- done after the fact to avoid problems with Change_Error_Text.
1272 Cur := First_Error_Msg;
1273 while Cur /= No_Error_Msg loop
1274 Nxt := Errors.Table (Cur).Next;
1277 while F /= No_Error_Msg
1278 and then Errors.Table (F).Sptr = Errors.Table (Cur).Sptr
1280 Check_Duplicate_Message (Cur, F);
1281 F := Errors.Table (F).Next;
1287 -- Mark any messages suppressed by specific warnings as Deleted
1289 Cur := First_Error_Msg;
1290 while Cur /= No_Error_Msg loop
1292 CE : Error_Msg_Object renames Errors.Table (Cur);
1297 (Warning_Specifically_Suppressed (CE.Sptr, CE.Text)
1299 Warning_Specifically_Suppressed (CE.Optr, CE.Text))
1301 Delete_Warning (Cur);
1303 -- If this is a continuation, delete previous messages
1306 while Errors.Table (F).Msg_Cont loop
1307 F := Errors.Table (F).Prev;
1311 -- Delete any following continuations
1315 F := Errors.Table (F).Next;
1316 exit when F = No_Error_Msg;
1317 exit when not Errors.Table (F).Msg_Cont;
1323 Cur := Errors.Table (Cur).Next;
1326 Finalize_Called := True;
1328 -- Check consistency of specific warnings (may add warnings). We only
1329 -- do this on the last call, after all possible warnings are posted.
1332 Validate_Specific_Warnings (Error_Msg'Access);
1340 function First_Node (C : Node_Id) return Node_Id is
1341 Orig : constant Node_Id := Original_Node (C);
1342 Loc : constant Source_Ptr := Sloc (Orig);
1343 Sfile : constant Source_File_Index := Get_Source_File_Index (Loc);
1347 function Test_Earlier (N : Node_Id) return Traverse_Result;
1348 -- Function applied to every node in the construct
1350 procedure Search_Tree_First is new Traverse_Proc (Test_Earlier);
1351 -- Create traversal procedure
1357 function Test_Earlier (N : Node_Id) return Traverse_Result is
1358 Norig : constant Node_Id := Original_Node (N);
1359 Loc : constant Source_Ptr := Sloc (Norig);
1362 -- Check for earlier
1366 -- Ignore nodes with no useful location information
1368 and then Loc /= Standard_Location
1369 and then Loc /= No_Location
1371 -- Ignore nodes from a different file. This ensures against cases
1372 -- of strange foreign code somehow being present. We don't want
1373 -- wild placement of messages if that happens.
1375 and then Get_Source_File_Index (Loc) = Sfile
1384 -- Start of processing for First_Node
1387 if Nkind (Orig) in N_Subexpr then
1390 Search_Tree_First (Orig);
1402 function First_Sloc (N : Node_Id) return Source_Ptr is
1403 SI : constant Source_File_Index := Source_Index (Get_Source_Unit (N));
1404 SF : constant Source_Ptr := Source_First (SI);
1409 F := First_Node (N);
1412 -- The following circuit is a bit subtle. When we have parenthesized
1413 -- expressions, then the Sloc will not record the location of the paren,
1414 -- but we would like to post the flag on the paren. So what we do is to
1415 -- crawl up the tree from the First_Node, adjusting the Sloc value for
1416 -- any parentheses we know are present. Yes, we know this circuit is not
1417 -- 100% reliable (e.g. because we don't record all possible paren level
1418 -- values), but this is only for an error message so it is good enough.
1421 Paren_Loop : for J in 1 .. Paren_Count (F) loop
1423 -- We don't look more than 12 characters behind the current
1424 -- location, and in any case not past the front of the source.
1426 Search_Loop : for K in 1 .. 12 loop
1427 exit Search_Loop when S = SF;
1429 if Source_Text (SI) (S - 1) = '(' then
1433 elsif Source_Text (SI) (S - 1) <= ' ' then
1439 end loop Search_Loop;
1440 end loop Paren_Loop;
1442 exit Node_Loop when F = N;
1444 exit Node_Loop when Nkind (F) not in N_Subexpr;
1454 procedure Initialize is
1457 First_Error_Msg := No_Error_Msg;
1458 Last_Error_Msg := No_Error_Msg;
1459 Serious_Errors_Detected := 0;
1460 Total_Errors_Detected := 0;
1461 Warnings_Detected := 0;
1462 Cur_Msg := No_Error_Msg;
1465 -- Initialize warnings table, if all warnings are suppressed, supply an
1466 -- initial dummy entry covering all possible source locations.
1469 Specific_Warnings.Init;
1471 if Warning_Mode = Suppress then
1473 ((Start => Source_Ptr'First, Stop => Source_Ptr'Last));
1481 function No_Warnings (N : Node_Or_Entity_Id) return Boolean is
1483 if Error_Posted (N) then
1486 elsif Nkind (N) in N_Entity and then Has_Warnings_Off (N) then
1489 elsif Is_Entity_Name (N)
1490 and then Present (Entity (N))
1491 and then Has_Warnings_Off (Entity (N))
1504 function OK_Node (N : Node_Id) return Boolean is
1505 K : constant Node_Kind := Nkind (N);
1508 if Error_Posted (N) then
1511 elsif K in N_Has_Etype
1512 and then Present (Etype (N))
1513 and then Error_Posted (Etype (N))
1518 or else K = N_Attribute_Reference
1519 or else K = N_Character_Literal
1520 or else K = N_Expanded_Name
1521 or else K = N_Identifier
1522 or else K = N_Operator_Symbol)
1523 and then Present (Entity (N))
1524 and then Error_Posted (Entity (N))
1532 ---------------------
1533 -- Output_Messages --
1534 ---------------------
1536 procedure Output_Messages is
1540 procedure Write_Error_Summary;
1541 -- Write error summary
1543 procedure Write_Header (Sfile : Source_File_Index);
1544 -- Write header line (compiling or checking given file)
1546 procedure Write_Max_Errors;
1547 -- Write message if max errors reached
1549 -------------------------
1550 -- Write_Error_Summary --
1551 -------------------------
1553 procedure Write_Error_Summary is
1555 -- Extra blank line if error messages or source listing were output
1557 if Total_Errors_Detected + Warnings_Detected > 0
1563 -- Message giving number of lines read and number of errors detected.
1564 -- This normally goes to Standard_Output. The exception is when brief
1565 -- mode is not set, verbose mode (or full list mode) is set, and
1566 -- there are errors. In this case we send the message to standard
1567 -- error to make sure that *something* appears on standard error in
1568 -- an error situation.
1570 -- Formerly, only the "# errors" suffix was sent to stderr, whereas
1571 -- "# lines:" appeared on stdout. This caused problems on VMS when
1572 -- the stdout buffer was flushed, giving an extra line feed after
1575 if Total_Errors_Detected + Warnings_Detected /= 0
1576 and then not Brief_Output
1577 and then (Verbose_Mode or Full_List)
1582 -- Message giving total number of lines
1585 Write_Int (Num_Source_Lines (Main_Source_File));
1587 if Num_Source_Lines (Main_Source_File) = 1 then
1588 Write_Str (" line: ");
1590 Write_Str (" lines: ");
1593 if Total_Errors_Detected = 0 then
1594 Write_Str ("No errors");
1596 elsif Total_Errors_Detected = 1 then
1597 Write_Str ("1 error");
1600 Write_Int (Total_Errors_Detected);
1601 Write_Str (" errors");
1604 if Warnings_Detected /= 0 then
1606 Write_Int (Warnings_Detected);
1607 Write_Str (" warning");
1609 if Warnings_Detected /= 1 then
1613 if Warning_Mode = Treat_As_Error then
1614 Write_Str (" (treated as error");
1616 if Warnings_Detected /= 1 then
1625 Set_Standard_Output;
1626 end Write_Error_Summary;
1632 procedure Write_Header (Sfile : Source_File_Index) is
1634 if Verbose_Mode or Full_List then
1635 if Original_Operating_Mode = Generate_Code then
1636 Write_Str ("Compiling: ");
1638 Write_Str ("Checking: ");
1641 Write_Name (Full_File_Name (Sfile));
1643 if not Debug_Flag_7 then
1644 Write_Str (" (source file time stamp: ");
1645 Write_Time_Stamp (Sfile);
1653 ----------------------
1654 -- Write_Max_Errors --
1655 ----------------------
1657 procedure Write_Max_Errors is
1659 if Maximum_Messages /= 0 then
1660 if Warnings_Detected >= Maximum_Messages then
1662 Write_Line ("maximum number of warnings output");
1663 Write_Line ("any further warnings suppressed");
1664 Set_Standard_Output;
1667 -- If too many errors print message
1669 if Total_Errors_Detected >= Maximum_Messages then
1671 Write_Line ("fatal error: maximum number of errors detected");
1672 Set_Standard_Output;
1675 end Write_Max_Errors;
1677 -- Start of processing for Output_Messages
1680 -- Error if Finalize has not been called
1682 if not Finalize_Called then
1683 raise Program_Error;
1686 -- Reset current error source file if the main unit has a pragma
1687 -- Source_Reference. This ensures outputting the proper name of
1688 -- the source file in this situation.
1690 if Main_Source_File = No_Source_File
1691 or else Num_SRef_Pragmas (Main_Source_File) /= 0
1693 Current_Error_Source_File := No_Source_File;
1698 if Brief_Output or (not Full_List and not Verbose_Mode) then
1701 E := First_Error_Msg;
1702 while E /= No_Error_Msg loop
1703 if not Errors.Table (E).Deleted and then not Debug_Flag_KK then
1704 if Full_Path_Name_For_Brief_Errors then
1705 Write_Name (Full_Ref_Name (Errors.Table (E).Sfile));
1707 Write_Name (Reference_Name (Errors.Table (E).Sfile));
1711 Write_Int (Int (Physical_To_Logical
1712 (Errors.Table (E).Line,
1713 Errors.Table (E).Sfile)));
1716 if Errors.Table (E).Col < 10 then
1720 Write_Int (Int (Errors.Table (E).Col));
1722 Output_Msg_Text (E);
1726 E := Errors.Table (E).Next;
1729 Set_Standard_Output;
1732 -- Full source listing case
1735 List_Pragmas_Index := 1;
1736 List_Pragmas_Mode := True;
1737 E := First_Error_Msg;
1739 -- Normal case, to stdout (copyright notice already output)
1741 if Full_List_File_Name = null then
1742 if not Debug_Flag_7 then
1749 Create_List_File_Access.all (Full_List_File_Name.all);
1750 Set_Special_Output (Write_List_Info_Access.all'Access);
1752 -- Write copyright notice to file
1754 if not Debug_Flag_7 then
1755 Write_Str ("GNAT ");
1756 Write_Str (Gnat_Version_String);
1758 Write_Str ("Copyright 1992-" &
1760 ", Free Software Foundation, Inc.");
1765 -- First list extended main source file units with errors
1767 for U in Main_Unit .. Last_Unit loop
1768 if In_Extended_Main_Source_Unit (Cunit_Entity (U))
1770 -- If debug flag d.m is set, only the main source is listed
1772 and then (U = Main_Unit or else not Debug_Flag_Dot_M)
1774 -- If the unit of the entity does not come from source, it is
1775 -- an implicit subprogram declaration for a child subprogram.
1776 -- Do not emit errors for it, they are listed with the body.
1779 (No (Cunit_Entity (U))
1780 or else Comes_From_Source (Cunit_Entity (U))
1781 or else not Is_Subprogram (Cunit_Entity (U)))
1784 Sfile : constant Source_File_Index := Source_Index (U);
1788 Write_Header (Sfile);
1791 -- Normally, we don't want an "error messages from file"
1792 -- message when listing the entire file, so we set the
1793 -- current source file as the current error source file.
1794 -- However, the old style of doing things was to list this
1795 -- message if pragma Source_Reference is present, even for
1796 -- the main unit. Since the purpose of the -gnatd.m switch
1797 -- is to duplicate the old behavior, we skip the reset if
1798 -- this debug flag is set.
1800 if not Debug_Flag_Dot_M then
1801 Current_Error_Source_File := Sfile;
1804 for N in 1 .. Last_Source_Line (Sfile) loop
1805 while E /= No_Error_Msg
1806 and then Errors.Table (E).Deleted
1808 E := Errors.Table (E).Next;
1813 and then Errors.Table (E).Line = N
1814 and then Errors.Table (E).Sfile = Sfile;
1816 Output_Source_Line (N, Sfile, Err_Flag);
1819 Output_Error_Msgs (E);
1821 if not Debug_Flag_2 then
1830 -- Then output errors, if any, for subsidiary units not in the
1831 -- main extended unit.
1833 -- Note: if debug flag d.m set, include errors for any units other
1834 -- than the main unit in the extended source unit (e.g. spec and
1835 -- subunits for a body).
1837 while E /= No_Error_Msg
1838 and then (not In_Extended_Main_Source_Unit (Errors.Table (E).Sptr)
1841 and then Get_Source_Unit
1842 (Errors.Table (E).Sptr) /= Main_Unit))
1844 if Errors.Table (E).Deleted then
1845 E := Errors.Table (E).Next;
1850 (Errors.Table (E).Line, Errors.Table (E).Sfile, True);
1851 Output_Error_Msgs (E);
1855 -- If output to file, write extra copy of error summary to the
1856 -- output file, and then close it.
1858 if Full_List_File_Name /= null then
1859 Write_Error_Summary;
1861 Close_List_File_Access.all;
1862 Cancel_Special_Output;
1866 -- Verbose mode (error lines only with error flags). Normally this is
1867 -- ignored in full list mode, unless we are listing to a file, in which
1868 -- case we still generate -gnatv output to standard output.
1871 and then (not Full_List or else Full_List_File_Name /= null)
1874 Write_Header (Main_Source_File);
1875 E := First_Error_Msg;
1877 -- Loop through error lines
1879 while E /= No_Error_Msg loop
1880 if Errors.Table (E).Deleted then
1881 E := Errors.Table (E).Next;
1885 (Errors.Table (E).Line, Errors.Table (E).Sfile, True);
1886 Output_Error_Msgs (E);
1891 -- Output error summary if verbose or full list mode
1893 if Verbose_Mode or else Full_List then
1894 Write_Error_Summary;
1899 if Warning_Mode = Treat_As_Error then
1900 Total_Errors_Detected := Total_Errors_Detected + Warnings_Detected;
1901 Warnings_Detected := 0;
1903 end Output_Messages;
1905 ------------------------
1906 -- Output_Source_Line --
1907 ------------------------
1909 procedure Output_Source_Line
1910 (L : Physical_Line_Number;
1911 Sfile : Source_File_Index;
1917 Line_Number_Output : Boolean := False;
1918 -- Set True once line number is output
1920 Empty_Line : Boolean := True;
1921 -- Set False if line includes at least one character
1924 if Sfile /= Current_Error_Source_File then
1925 Write_Str ("==============Error messages for ");
1927 case Sinput.File_Type (Sfile) is
1929 Write_Str ("source");
1931 when Sinput.Config =>
1932 Write_Str ("configuration pragmas");
1935 Write_Str ("symbol definition");
1937 when Sinput.Preproc =>
1938 Write_Str ("preprocessing data");
1941 Write_Str (" file: ");
1942 Write_Name (Full_File_Name (Sfile));
1945 if Num_SRef_Pragmas (Sfile) > 0 then
1946 Write_Str ("--------------Line numbers from file: ");
1947 Write_Name (Full_Ref_Name (Sfile));
1948 Write_Str (" (starting at line ");
1949 Write_Int (Int (First_Mapped_Line (Sfile)));
1954 Current_Error_Source_File := Sfile;
1957 if Errs or List_Pragmas_Mode then
1958 Output_Line_Number (Physical_To_Logical (L, Sfile));
1959 Line_Number_Output := True;
1962 S := Line_Start (L, Sfile);
1965 C := Source_Text (Sfile) (S);
1966 exit when C = ASCII.LF or else C = ASCII.CR or else C = EOF;
1968 -- Deal with matching entry in List_Pragmas table
1971 and then List_Pragmas_Index <= List_Pragmas.Last
1972 and then S = List_Pragmas.Table (List_Pragmas_Index).Ploc
1974 case List_Pragmas.Table (List_Pragmas_Index).Ptyp is
1978 -- Ignore if on line with errors so that error flags
1979 -- get properly listed with the error line .
1982 Write_Char (ASCII.FF);
1986 List_Pragmas_Mode := True;
1988 if not Line_Number_Output then
1989 Output_Line_Number (Physical_To_Logical (L, Sfile));
1990 Line_Number_Output := True;
1997 List_Pragmas_Mode := False;
2000 List_Pragmas_Index := List_Pragmas_Index + 1;
2002 -- Normal case (no matching entry in List_Pragmas table)
2005 if Errs or List_Pragmas_Mode then
2010 Empty_Line := False;
2014 -- If we have output a source line, then add the line terminator, with
2015 -- training spaces preserved (so we output the line exactly as input).
2017 if Line_Number_Output then
2021 Write_Eol_Keep_Blanks;
2024 end Output_Source_Line;
2026 -----------------------------
2027 -- Remove_Warning_Messages --
2028 -----------------------------
2030 procedure Remove_Warning_Messages (N : Node_Id) is
2032 function Check_For_Warning (N : Node_Id) return Traverse_Result;
2033 -- This function checks one node for a possible warning message
2035 function Check_All_Warnings is new Traverse_Func (Check_For_Warning);
2036 -- This defines the traversal operation
2038 -----------------------
2039 -- Check_For_Warning --
2040 -----------------------
2042 function Check_For_Warning (N : Node_Id) return Traverse_Result is
2043 Loc : constant Source_Ptr := Sloc (N);
2046 function To_Be_Removed (E : Error_Msg_Id) return Boolean;
2047 -- Returns True for a message that is to be removed. Also adjusts
2048 -- warning count appropriately.
2054 function To_Be_Removed (E : Error_Msg_Id) return Boolean is
2056 if E /= No_Error_Msg
2058 -- Don't remove if location does not match
2060 and then Errors.Table (E).Optr = Loc
2062 -- Don't remove if not warning/info message. Note that we do
2063 -- not remove style messages here. They are warning messages
2064 -- but not ones we want removed in this context.
2066 and then Errors.Table (E).Warn
2068 -- Don't remove unconditional messages
2070 and then not Errors.Table (E).Uncond
2072 Warnings_Detected := Warnings_Detected - 1;
2075 -- No removal required
2082 -- Start of processing for Check_For_Warnings
2085 while To_Be_Removed (First_Error_Msg) loop
2086 First_Error_Msg := Errors.Table (First_Error_Msg).Next;
2089 if First_Error_Msg = No_Error_Msg then
2090 Last_Error_Msg := No_Error_Msg;
2093 E := First_Error_Msg;
2094 while E /= No_Error_Msg loop
2095 while To_Be_Removed (Errors.Table (E).Next) loop
2096 Errors.Table (E).Next :=
2097 Errors.Table (Errors.Table (E).Next).Next;
2099 if Errors.Table (E).Next = No_Error_Msg then
2100 Last_Error_Msg := E;
2104 E := Errors.Table (E).Next;
2107 if Nkind (N) = N_Raise_Constraint_Error
2108 and then Original_Node (N) /= N
2109 and then No (Condition (N))
2111 -- Warnings may have been posted on subexpressions of the original
2112 -- tree. We place the original node back on the tree to remove
2113 -- those warnings, whose sloc do not match those of any node in
2114 -- the current tree. Given that we are in unreachable code, this
2115 -- modification to the tree is harmless.
2118 Status : Traverse_Final_Result;
2121 if Is_List_Member (N) then
2122 Set_Condition (N, Original_Node (N));
2123 Status := Check_All_Warnings (Condition (N));
2125 Rewrite (N, Original_Node (N));
2126 Status := Check_All_Warnings (N);
2135 end Check_For_Warning;
2137 -- Start of processing for Remove_Warning_Messages
2140 if Warnings_Detected /= 0 then
2142 Discard : Traverse_Final_Result;
2143 pragma Warnings (Off, Discard);
2146 Discard := Check_All_Warnings (N);
2149 end Remove_Warning_Messages;
2151 procedure Remove_Warning_Messages (L : List_Id) is
2154 if Is_Non_Empty_List (L) then
2156 while Present (Stat) loop
2157 Remove_Warning_Messages (Stat);
2161 end Remove_Warning_Messages;
2163 ---------------------------
2164 -- Set_Identifier_Casing --
2165 ---------------------------
2167 procedure Set_Identifier_Casing
2168 (Identifier_Name : System.Address;
2169 File_Name : System.Address)
2171 Ident : constant Big_String_Ptr := To_Big_String_Ptr (Identifier_Name);
2172 File : constant Big_String_Ptr := To_Big_String_Ptr (File_Name);
2175 Desired_Case : Casing_Type := Mixed_Case;
2176 -- Casing required for result. Default value of Mixed_Case is used if
2177 -- for some reason we cannot find the right file name in the table.
2180 -- Get length of file name
2183 while File (Flen + 1) /= ASCII.NUL loop
2187 -- Loop through file names to find matching one. This is a bit slow, but
2188 -- we only do it in error situations so it is not so terrible. Note that
2189 -- if the loop does not exit, then the desired case will be left set to
2190 -- Mixed_Case, this can happen if the name was not in canonical form,
2191 -- and gets canonicalized on VMS. Possibly we could fix this by
2192 -- unconditionally canonicalizing these names ???
2194 for J in 1 .. Last_Source_File loop
2195 Get_Name_String (Full_Debug_Name (J));
2198 and then Name_Buffer (1 .. Name_Len) = String (File (1 .. Flen))
2200 Desired_Case := Identifier_Casing (J);
2205 -- Copy identifier as given to Name_Buffer
2207 for J in Name_Buffer'Range loop
2208 Name_Buffer (J) := Ident (J);
2210 if Name_Buffer (J) = ASCII.NUL then
2216 Set_Casing (Desired_Case);
2217 end Set_Identifier_Casing;
2219 -----------------------
2220 -- Set_Ignore_Errors --
2221 -----------------------
2223 procedure Set_Ignore_Errors (To : Boolean) is
2225 Errors_Must_Be_Ignored := To;
2226 end Set_Ignore_Errors;
2228 ------------------------------
2229 -- Set_Msg_Insertion_Column --
2230 ------------------------------
2232 procedure Set_Msg_Insertion_Column is
2234 if RM_Column_Check then
2235 Set_Msg_Str (" in column ");
2236 Set_Msg_Int (Int (Error_Msg_Col) + 1);
2238 end Set_Msg_Insertion_Column;
2240 ----------------------------
2241 -- Set_Msg_Insertion_Node --
2242 ----------------------------
2244 procedure Set_Msg_Insertion_Node is
2249 Error_Msg_Node_1 = Error
2250 or else Error_Msg_Node_1 = Any_Type;
2252 if Error_Msg_Node_1 = Empty then
2253 Set_Msg_Blank_Conditional;
2254 Set_Msg_Str ("<empty>");
2256 elsif Error_Msg_Node_1 = Error then
2258 Set_Msg_Str ("<error>");
2260 elsif Error_Msg_Node_1 = Standard_Void_Type then
2262 Set_Msg_Str ("procedure name");
2265 Set_Msg_Blank_Conditional;
2269 K := Nkind (Error_Msg_Node_1);
2271 -- If we have operator case, skip quotes since name of operator
2272 -- itself will supply the required quotations. An operator can be an
2273 -- applied use in an expression or an explicit operator symbol, or an
2274 -- identifier whose name indicates it is an operator.
2277 or else K = N_Operator_Symbol
2278 or else K = N_Defining_Operator_Symbol
2279 or else ((K = N_Identifier or else K = N_Defining_Identifier)
2280 and then Is_Operator_Name (Chars (Error_Msg_Node_1)))
2282 Set_Msg_Node (Error_Msg_Node_1);
2284 -- Normal case, not an operator, surround with quotes
2288 Set_Qualification (Error_Msg_Qual_Level, Error_Msg_Node_1);
2289 Set_Msg_Node (Error_Msg_Node_1);
2294 -- The following assignment ensures that a second ampersand insertion
2295 -- character will correspond to the Error_Msg_Node_2 parameter. We
2296 -- suppress possible validity checks in case operating in -gnatVa mode,
2297 -- and Error_Msg_Node_2 is not needed and has not been set.
2300 pragma Suppress (Range_Check);
2302 Error_Msg_Node_1 := Error_Msg_Node_2;
2304 end Set_Msg_Insertion_Node;
2306 --------------------------------------
2307 -- Set_Msg_Insertion_Type_Reference --
2308 --------------------------------------
2310 procedure Set_Msg_Insertion_Type_Reference (Flag : Source_Ptr) is
2316 if Error_Msg_Node_1 = Standard_Void_Type then
2317 Set_Msg_Str ("package or procedure name");
2320 elsif Error_Msg_Node_1 = Standard_Exception_Type then
2321 Set_Msg_Str ("exception name");
2324 elsif Error_Msg_Node_1 = Any_Access
2325 or else Error_Msg_Node_1 = Any_Array
2326 or else Error_Msg_Node_1 = Any_Boolean
2327 or else Error_Msg_Node_1 = Any_Character
2328 or else Error_Msg_Node_1 = Any_Composite
2329 or else Error_Msg_Node_1 = Any_Discrete
2330 or else Error_Msg_Node_1 = Any_Fixed
2331 or else Error_Msg_Node_1 = Any_Integer
2332 or else Error_Msg_Node_1 = Any_Modular
2333 or else Error_Msg_Node_1 = Any_Numeric
2334 or else Error_Msg_Node_1 = Any_Real
2335 or else Error_Msg_Node_1 = Any_Scalar
2336 or else Error_Msg_Node_1 = Any_String
2338 Get_Unqualified_Decoded_Name_String (Chars (Error_Msg_Node_1));
2339 Set_Msg_Name_Buffer;
2342 elsif Error_Msg_Node_1 = Universal_Real then
2343 Set_Msg_Str ("type universal real");
2346 elsif Error_Msg_Node_1 = Universal_Integer then
2347 Set_Msg_Str ("type universal integer");
2350 elsif Error_Msg_Node_1 = Universal_Fixed then
2351 Set_Msg_Str ("type universal fixed");
2355 -- Special case of anonymous array
2357 if Nkind (Error_Msg_Node_1) in N_Entity
2358 and then Is_Array_Type (Error_Msg_Node_1)
2359 and then Present (Related_Array_Object (Error_Msg_Node_1))
2361 Set_Msg_Str ("type of ");
2362 Set_Msg_Node (Related_Array_Object (Error_Msg_Node_1));
2363 Set_Msg_Str (" declared");
2364 Set_Msg_Insertion_Line_Number
2365 (Sloc (Related_Array_Object (Error_Msg_Node_1)), Flag);
2369 -- If we fall through, it is not a special case, so first output
2370 -- the name of the type, preceded by private for a private type
2372 if Is_Private_Type (Error_Msg_Node_1) then
2373 Set_Msg_Str ("private type ");
2375 Set_Msg_Str ("type ");
2378 Ent := Error_Msg_Node_1;
2380 if Is_Internal_Name (Chars (Ent)) then
2381 Unwind_Internal_Type (Ent);
2384 -- Types in Standard are displayed as "Standard.name"
2386 if Sloc (Ent) <= Standard_Location then
2388 Set_Msg_Str ("Standard.");
2393 -- Types in other language defined units are displayed as
2394 -- "package-name.type-name"
2397 Is_Predefined_File_Name (Unit_File_Name (Get_Source_Unit (Ent)))
2399 Get_Unqualified_Decoded_Name_String
2400 (Unit_Name (Get_Source_Unit (Ent)));
2401 Name_Len := Name_Len - 2;
2403 Set_Casing (Mixed_Case);
2404 Set_Msg_Name_Buffer;
2406 Set_Casing (Mixed_Case);
2411 -- All other types display as "type name" defined at line xxx
2412 -- possibly qualified if qualification is requested.
2416 Set_Qualification (Error_Msg_Qual_Level, Ent);
2420 -- If Ent is an anonymous subprogram type, there is no name to print,
2421 -- so remove enclosing quotes.
2423 if Buffer_Ends_With ("""") then
2424 Buffer_Remove ("""");
2430 -- If the original type did not come from a predefined file, add the
2431 -- location where the type was defined.
2433 if Sloc (Error_Msg_Node_1) > Standard_Location
2435 not Is_Predefined_File_Name
2436 (Unit_File_Name (Get_Source_Unit (Error_Msg_Node_1)))
2438 Set_Msg_Str (" defined");
2439 Set_Msg_Insertion_Line_Number (Sloc (Error_Msg_Node_1), Flag);
2441 -- If it did come from a predefined file, deal with the case where
2442 -- this was a file with a generic instantiation from elsewhere.
2445 if Sloc (Error_Msg_Node_1) > Standard_Location then
2447 Iloc : constant Source_Ptr :=
2448 Instantiation_Location (Sloc (Error_Msg_Node_1));
2451 if Iloc /= No_Location
2452 and then not Suppress_Instance_Location
2454 Set_Msg_Str (" from instance");
2455 Set_Msg_Insertion_Line_Number (Iloc, Flag);
2460 end Set_Msg_Insertion_Type_Reference;
2462 ---------------------------------
2463 -- Set_Msg_Insertion_Unit_Name --
2464 ---------------------------------
2466 procedure Set_Msg_Insertion_Unit_Name (Suffix : Boolean := True) is
2468 if Error_Msg_Unit_1 = No_Unit_Name then
2471 elsif Error_Msg_Unit_1 = Error_Unit_Name then
2473 Set_Msg_Str ("<error>");
2476 Get_Unit_Name_String (Error_Msg_Unit_1, Suffix);
2479 Set_Msg_Name_Buffer;
2483 -- The following assignment ensures that a second percent insertion
2484 -- character will correspond to the Error_Msg_Unit_2 parameter. We
2485 -- suppress possible validity checks in case operating in -gnatVa mode,
2486 -- and Error_Msg_Unit_2 is not needed and has not been set.
2489 pragma Suppress (Range_Check);
2491 Error_Msg_Unit_1 := Error_Msg_Unit_2;
2493 end Set_Msg_Insertion_Unit_Name;
2499 procedure Set_Msg_Node (Node : Node_Id) is
2504 case Nkind (Node) is
2505 when N_Designator =>
2506 Set_Msg_Node (Name (Node));
2508 Set_Msg_Node (Identifier (Node));
2511 when N_Defining_Program_Unit_Name =>
2512 Set_Msg_Node (Name (Node));
2514 Set_Msg_Node (Defining_Identifier (Node));
2517 when N_Selected_Component | N_Expanded_Name =>
2518 Set_Msg_Node (Prefix (Node));
2520 Set_Msg_Node (Selector_Name (Node));
2527 -- The only remaining possibilities are identifiers, defining
2528 -- identifiers, pragmas, and pragma argument associations.
2530 if Nkind (Node) = N_Pragma then
2531 Nam := Pragma_Name (Node);
2533 -- The other cases have Chars fields, and we want to test for possible
2534 -- internal names, which generally represent something gone wrong. An
2535 -- exception is the case of internal type names, where we try to find a
2536 -- reasonable external representation for the external name
2538 elsif Is_Internal_Name (Chars (Node))
2540 ((Is_Entity_Name (Node)
2541 and then Present (Entity (Node))
2542 and then Is_Type (Entity (Node)))
2544 (Nkind (Node) = N_Defining_Identifier and then Is_Type (Node)))
2546 if Nkind (Node) = N_Identifier then
2547 Ent := Entity (Node);
2552 -- If the type is the designated type of an access_to_subprogram,
2553 -- there is no name to provide in the call.
2555 if Ekind (Ent) = E_Subprogram_Type then
2558 Unwind_Internal_Type (Ent);
2562 -- If not internal name, just use name in Chars field
2565 Nam := Chars (Node);
2568 -- At this stage, the name to output is in Nam
2570 Get_Unqualified_Decoded_Name_String (Nam);
2572 -- Remove trailing upper case letters from the name (useful for
2573 -- dealing with some cases of internal names.
2575 while Name_Len > 1 and then Name_Buffer (Name_Len) in 'A' .. 'Z' loop
2576 Name_Len := Name_Len - 1;
2579 -- If we have any of the names from standard that start with the
2580 -- characters "any " (e.g. Any_Type), then kill the message since
2581 -- almost certainly it is a junk cascaded message.
2584 and then Name_Buffer (1 .. 4) = "any "
2586 Kill_Message := True;
2589 -- Now we have to set the proper case. If we have a source location
2590 -- then do a check to see if the name in the source is the same name
2591 -- as the name in the Names table, except for possible differences
2592 -- in case, which is the case when we can copy from the source.
2595 Src_Loc : constant Source_Ptr := Sloc (Node);
2596 Sbuffer : Source_Buffer_Ptr;
2598 Src_Ptr : Source_Ptr;
2604 -- For standard locations, always use mixed case
2606 if Src_Loc <= No_Location
2607 or else Sloc (Node) <= No_Location
2609 Set_Casing (Mixed_Case);
2612 -- Determine if the reference we are dealing with corresponds to
2613 -- text at the point of the error reference. This will often be
2614 -- the case for simple identifier references, and is the case
2615 -- where we can copy the spelling from the source.
2617 Sbuffer := Source_Text (Get_Source_File_Index (Src_Loc));
2619 while Ref_Ptr <= Name_Len loop
2621 Fold_Lower (Sbuffer (Src_Ptr)) /=
2622 Fold_Lower (Name_Buffer (Ref_Ptr));
2623 Ref_Ptr := Ref_Ptr + 1;
2624 Src_Ptr := Src_Ptr + 1;
2627 -- If we get through the loop without a mismatch, then output the
2628 -- name the way it is spelled in the source program
2630 if Ref_Ptr > Name_Len then
2633 for J in 1 .. Name_Len loop
2634 Name_Buffer (J) := Sbuffer (Src_Ptr);
2635 Src_Ptr := Src_Ptr + 1;
2638 -- Otherwise set the casing using the default identifier casing
2641 Set_Casing (Identifier_Casing (Flag_Source), Mixed_Case);
2646 Set_Msg_Name_Buffer;
2654 procedure Set_Msg_Text (Text : String; Flag : Source_Ptr) is
2655 C : Character; -- Current character
2656 P : Natural; -- Current index;
2659 Manual_Quote_Mode := False;
2660 Is_Unconditional_Msg := False;
2662 Flag_Source := Get_Source_File_Index (Flag);
2665 while P <= Text'Last loop
2669 -- Check for insertion character or sequence
2673 if P <= Text'Last and then Text (P) = '%' then
2675 Set_Msg_Insertion_Name_Literal;
2677 Set_Msg_Insertion_Name;
2681 if P <= Text'Last and then Text (P) = '$' then
2683 Set_Msg_Insertion_Unit_Name (Suffix => False);
2685 Set_Msg_Insertion_Unit_Name;
2689 Set_Msg_Insertion_File_Name;
2692 Set_Msg_Insertion_Type_Reference (Flag);
2695 Set_Msg_Insertion_Reserved_Name;
2698 Set_Msg_Insertion_Node;
2701 Set_Msg_Insertion_Line_Number (Error_Msg_Sloc, Flag);
2704 Continuation := True;
2706 if Text (P) = '\' then
2707 Continuation_New_Line := True;
2712 Set_Msg_Insertion_Column;
2715 Set_Msg_Insertion_Run_Time_Name;
2718 Set_Msg_Insertion_Uint;
2721 Manual_Quote_Mode := not Manual_Quote_Mode;
2725 Is_Unconditional_Msg := True;
2728 null; -- already dealt with
2731 null; -- already dealt with
2734 null; -- already dealt with
2737 Set_Msg_Char (Text (P));
2741 Set_Msg_Str (Error_Msg_String (1 .. Error_Msg_Strlen));
2743 -- Upper case letter
2747 -- Start of reserved word if two or more
2749 if P <= Text'Last and then Text (P) in 'A' .. 'Z' then
2751 Set_Msg_Insertion_Reserved_Word (Text, P);
2753 -- Single upper case letter is just inserted
2759 -- Normal character with no special treatment
2773 procedure Set_Posted (N : Node_Id) is
2777 if Is_Serious_Error then
2779 -- We always set Error_Posted on the node itself
2781 Set_Error_Posted (N);
2783 -- If it is a subexpression, then set Error_Posted on parents up to
2784 -- and including the first non-subexpression construct. This helps
2785 -- avoid cascaded error messages within a single expression.
2791 Set_Error_Posted (P);
2792 exit when Nkind (P) not in N_Subexpr;
2795 -- A special check, if we just posted an error on an attribute
2796 -- definition clause, then also set the entity involved as posted.
2797 -- For example, this stops complaining about the alignment after
2798 -- complaining about the size, which is likely to be useless.
2800 if Nkind (P) = N_Attribute_Definition_Clause then
2801 if Is_Entity_Name (Name (P)) then
2802 Set_Error_Posted (Entity (Name (P)));
2808 -----------------------
2809 -- Set_Qualification --
2810 -----------------------
2812 procedure Set_Qualification (N : Nat; E : Entity_Id) is
2814 if N /= 0 and then Scope (E) /= Standard_Standard then
2815 Set_Qualification (N - 1, Scope (E));
2816 Set_Msg_Node (Scope (E));
2819 end Set_Qualification;
2821 ------------------------
2822 -- Special_Msg_Delete --
2823 ------------------------
2825 -- Is it really right to have all this specialized knowledge in errout?
2827 function Special_Msg_Delete
2829 N : Node_Or_Entity_Id;
2830 E : Node_Or_Entity_Id) return Boolean
2833 -- Never delete messages in -gnatdO mode
2835 if Debug_Flag_OO then
2838 -- Processing for "atomic access cannot be guaranteed"
2840 elsif Msg = "atomic access to & cannot be guaranteed" then
2842 -- When an atomic object refers to a non-atomic type in the same
2843 -- scope, we implicitly make the type atomic. In the non-error case
2844 -- this is surely safe (and in fact prevents an error from occurring
2845 -- if the type is not atomic by default). But if the object cannot be
2846 -- made atomic, then we introduce an extra junk message by this
2847 -- manipulation, which we get rid of here.
2849 -- We identify this case by the fact that it references a type for
2850 -- which Is_Atomic is set, but there is no Atomic pragma setting it.
2853 and then Is_Atomic (E)
2854 and then No (Get_Rep_Pragma (E, Name_Atomic))
2859 -- Processing for "Size too small" messages
2861 elsif Msg = "size for& too small, minimum allowed is ^" then
2863 -- Suppress "size too small" errors in CodePeer mode and Alfa mode,
2864 -- since pragma Pack is also ignored in these configurations.
2866 if CodePeer_Mode or Alfa_Mode then
2869 -- When a size is wrong for a frozen type there is no explicit size
2870 -- clause, and other errors have occurred, suppress the message,
2871 -- since it is likely that this size error is a cascaded result of
2872 -- other errors. The reason we eliminate unfrozen types is that
2873 -- messages issued before the freeze type are for sure OK.
2876 and then Serious_Errors_Detected > 0
2877 and then Nkind (N) /= N_Component_Clause
2878 and then Nkind (Parent (N)) /= N_Component_Clause
2880 No (Get_Attribute_Definition_Clause (E, Attribute_Size))
2882 No (Get_Attribute_Definition_Clause (E, Attribute_Object_Size))
2884 No (Get_Attribute_Definition_Clause (E, Attribute_Value_Size))
2890 -- All special tests complete, so go ahead with message
2893 end Special_Msg_Delete;
2895 --------------------------
2896 -- Unwind_Internal_Type --
2897 --------------------------
2899 procedure Unwind_Internal_Type (Ent : in out Entity_Id) is
2900 Derived : Boolean := False;
2902 Old_Ent : Entity_Id;
2905 -- Undo placement of a quote, since we will put it back later
2907 Mchar := Msg_Buffer (Msglen);
2910 Msglen := Msglen - 1;
2913 -- The loop here deals with recursive types, we are trying to find a
2914 -- related entity that is not an implicit type. Note that the check with
2915 -- Old_Ent stops us from getting "stuck". Also, we don't output the
2916 -- "type derived from" message more than once in the case where we climb
2917 -- up multiple levels.
2922 -- Implicit access type, use directly designated type In Ada 2005,
2923 -- the designated type may be an anonymous access to subprogram, in
2924 -- which case we can only point to its definition.
2926 if Is_Access_Type (Ent) then
2927 if Ekind (Ent) = E_Access_Subprogram_Type
2928 or else Ekind (Ent) = E_Anonymous_Access_Subprogram_Type
2929 or else Is_Access_Protected_Subprogram_Type (Ent)
2931 Ent := Directly_Designated_Type (Ent);
2933 if not Comes_From_Source (Ent) then
2934 if Buffer_Ends_With ("type ") then
2935 Buffer_Remove ("type ");
2938 if Is_Itype (Ent) then
2940 Assoc : constant Node_Id :=
2941 Associated_Node_For_Itype (Ent);
2944 if Nkind (Assoc) in N_Subprogram_Specification then
2946 -- Anonymous access to subprogram in a signature.
2947 -- Indicate the enclosing subprogram.
2951 (Associated_Node_For_Itype (Ent));
2953 ("access to subprogram declared in profile of ");
2956 Set_Msg_Str ("access to subprogram with profile ");
2961 elsif Ekind (Ent) = E_Function then
2962 Set_Msg_Str ("access to function ");
2964 Set_Msg_Str ("access to procedure ");
2969 -- Type is access to object, named or anonymous
2972 Set_Msg_Str ("access to ");
2973 Ent := Directly_Designated_Type (Ent);
2978 elsif Is_Class_Wide_Type (Ent) then
2980 Ent := Root_Type (Ent);
2982 -- Use base type if this is a subtype
2984 elsif Ent /= Base_Type (Ent) then
2985 Buffer_Remove ("type ");
2987 -- Avoid duplication "subtype of subtype of", and also replace
2988 -- "derived from subtype of" simply by "derived from"
2990 if not Buffer_Ends_With ("subtype of ")
2991 and then not Buffer_Ends_With ("derived from ")
2993 Set_Msg_Str ("subtype of ");
2996 Ent := Base_Type (Ent);
2998 -- If this is a base type with a first named subtype, use the first
2999 -- named subtype instead. This is not quite accurate in all cases,
3000 -- but it makes too much noise to be accurate and add 'Base in all
3001 -- cases. Note that we only do this is the first named subtype is not
3002 -- itself an internal name. This avoids the obvious loop (subtype ->
3003 -- basetype -> subtype) which would otherwise occur!)
3007 FST : constant Entity_Id := First_Subtype (Ent);
3010 if not Is_Internal_Name (Chars (FST)) then
3014 -- Otherwise use root type
3018 Buffer_Remove ("type ");
3020 -- Test for "subtype of type derived from" which seems
3021 -- excessive and is replaced by "type derived from".
3023 Buffer_Remove ("subtype of");
3025 -- Avoid duplicated "type derived from type derived from"
3027 if not Buffer_Ends_With ("type derived from ") then
3028 Set_Msg_Str ("type derived from ");
3039 -- If we are stuck in a loop, get out and settle for the internal
3040 -- name after all. In this case we set to kill the message if it is
3041 -- not the first error message (we really try hard not to show the
3042 -- dirty laundry of the implementation to the poor user!)
3044 if Ent = Old_Ent then
3045 Kill_Message := True;
3049 -- Get out if we finally found a non-internal name to use
3051 exit Find when not Is_Internal_Name (Chars (Ent));
3057 end Unwind_Internal_Type;
3063 procedure VMS_Convert is
3073 P := Msg_Buffer'First;
3079 if Msg_Buffer (P) = '-' then
3080 for G in Gnames'Range loop
3081 L := Gnames (G)'Length;
3083 -- See if we have "-ggg switch", where ggg is Gnames entry
3085 if P + L + 7 <= Msglen
3086 and then Msg_Buffer (P + 1 .. P + L) = Gnames (G).all
3087 and then Msg_Buffer (P + L + 1 .. P + L + 7) = " switch"
3089 -- Replace by "/vvv qualifier", where vvv is Vnames entry
3091 N := Vnames (G)'Length;
3092 Msg_Buffer (P + N + 11 .. Msglen + N - L + 3) :=
3093 Msg_Buffer (P + L + 8 .. Msglen);
3094 Msg_Buffer (P) := '/';
3095 Msg_Buffer (P + 1 .. P + N) := Vnames (G).all;
3096 Msg_Buffer (P + N + 1 .. P + N + 10) := " qualifier";
3098 Msglen := Msglen + N - L + 3;