1 ------------------------------------------------------------------------------
3 -- GNAT COMPILER COMPONENTS --
9 -- Copyright (C) 1992-2010, 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
147 -- given node to the current message.
149 procedure Set_Msg_Text (Text : String; Flag : Source_Ptr);
150 -- Add a sequence of characters to the current message. The characters may
151 -- be one of the special insertion characters (see documentation in spec).
152 -- Flag is the location at which the error is to be posted, which is used
153 -- to determine whether or not the # insertion needs a file name. The
154 -- variables Msg_Buffer, Msglen, Is_Style_Msg, Is_Warning_Msg, and
155 -- Is_Unconditional_Msg are set on return.
157 procedure Set_Posted (N : Node_Id);
158 -- Sets the Error_Posted flag on the given node, and all its parents
159 -- that are subexpressions and then on the parent non-subexpression
160 -- construct that contains the original expression (this reduces the
161 -- number of cascaded messages). Note that this call only has an effect
162 -- for a serious error. For a non-serious error, it has no effect.
164 procedure Set_Qualification (N : Nat; E : Entity_Id);
165 -- Outputs up to N levels of qualification for the given entity. For
166 -- example, the entity A.B.C.D will output B.C. if N = 2.
168 function Special_Msg_Delete
170 N : Node_Or_Entity_Id;
171 E : Node_Or_Entity_Id) return Boolean;
172 -- This function is called from Error_Msg_NEL, passing the message Msg,
173 -- node N on which the error is to be posted, and the entity or node E
174 -- to be used for an & insertion in the message if any. The job of this
175 -- procedure is to test for certain cascaded messages that we would like
176 -- to suppress. If the message is to be suppressed then we return True.
177 -- If the message should be generated (the normal case) False is returned.
179 procedure Unwind_Internal_Type (Ent : in out Entity_Id);
180 -- This procedure is given an entity id for an internal type, i.e. a type
181 -- with an internal name. It unwinds the type to try to get to something
182 -- reasonably printable, generating prefixes like "subtype of", "access
183 -- to", etc along the way in the buffer. The value in Ent on return is the
184 -- final name to be printed. Hopefully this is not an internal name, but in
185 -- some internal name cases, it is an internal name, and has to be printed
186 -- anyway (although in this case the message has been killed if possible).
187 -- The global variable Class_Flag is set to True if the resulting entity
188 -- should have 'Class appended to its name (see Add_Class procedure), and
189 -- is otherwise unchanged.
191 procedure VMS_Convert;
192 -- This procedure has no effect if called when the host is not OpenVMS. If
193 -- the host is indeed OpenVMS, then the error message stored in Msg_Buffer
194 -- is scanned for appearances of switch names which need converting to
195 -- corresponding VMS qualifier names. See Gnames/Vnames table in Errout
196 -- spec for precise definition of the conversion that is performed by this
197 -- 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;
227 ------------------------
228 -- Compilation_Errors --
229 ------------------------
231 function Compilation_Errors return Boolean is
233 if not Finalize_Called then
236 return Erroutc.Compilation_Errors;
238 end Compilation_Errors;
244 -- Error_Msg posts a flag at the given location, except that if the
245 -- Flag_Location points within a generic template and corresponds to an
246 -- instantiation of this generic template, then the actual message will be
247 -- posted on the generic instantiation, along with additional messages
248 -- referencing the generic declaration.
250 procedure Error_Msg (Msg : String; Flag_Location : Source_Ptr) is
251 Sindex : Source_File_Index;
252 -- Source index for flag location
254 Orig_Loc : Source_Ptr;
255 -- Original location of Flag_Location (i.e. location in original
256 -- template in instantiation case, otherwise unchanged).
259 -- It is a fatal error to issue an error message when scanning from the
260 -- internal source buffer (see Sinput for further documentation)
262 pragma Assert (Sinput.Source /= Internal_Source_Ptr);
264 -- Return if all errors are to be ignored
266 if Errors_Must_Be_Ignored then
270 -- If we already have messages, and we are trying to place a message at
271 -- No_Location or in package Standard, then just ignore the attempt
272 -- since we assume that what is happening is some cascaded junk. Note
273 -- that this is safe in the sense that proceeding will surely bomb.
275 if Flag_Location < First_Source_Ptr
276 and then Total_Errors_Detected > 0
281 -- Start of processing for new message
283 Sindex := Get_Source_File_Index (Flag_Location);
284 Test_Style_Warning_Serious_Msg (Msg);
285 Orig_Loc := Original_Location (Flag_Location);
287 -- If the current location is in an instantiation, the issue arises of
288 -- whether to post the message on the template or the instantiation.
290 -- The way we decide is to see if we have posted the same message on
291 -- the template when we compiled the template (the template is always
292 -- compiled before any instantiations). For this purpose, we use a
293 -- separate table of messages. The reason we do this is twofold:
295 -- First, the messages can get changed by various processing
296 -- including the insertion of tokens etc, making it hard to
297 -- do the comparison.
299 -- Second, we will suppress a warning on a template if it is not in
300 -- the current extended source unit. That's reasonable and means we
301 -- don't want the warning on the instantiation here either, but it
302 -- does mean that the main error table would not in any case include
305 if Flag_Location = Orig_Loc then
306 Non_Instance_Msgs.Append ((new String'(Msg), Flag_Location));
307 Warn_On_Instance := False;
309 -- Here we have an instance message
312 -- Delete if debug flag off, and this message duplicates a message
313 -- already posted on the corresponding template
315 if not Debug_Flag_GG then
316 for J in Non_Instance_Msgs.First .. Non_Instance_Msgs.Last loop
317 if Msg = Non_Instance_Msgs.Table (J).Msg.all
318 and then Non_Instance_Msgs.Table (J).Loc = Orig_Loc
325 -- No duplicate, so error/warning will be posted on instance
327 Warn_On_Instance := Is_Warning_Msg;
330 -- Ignore warning message that is suppressed for this location. Note
331 -- that style checks are not considered warning messages for this
334 if Is_Warning_Msg and then Warnings_Suppressed (Orig_Loc) then
337 -- For style messages, check too many messages so far
340 and then Maximum_Messages /= 0
341 and then Warnings_Detected >= Maximum_Messages
346 -- The idea at this stage is that we have two kinds of messages
348 -- First, we have those messages that are to be placed as requested at
349 -- Flag_Location. This includes messages that have nothing to do with
350 -- generics, and also messages placed on generic templates that reflect
351 -- an error in the template itself. For such messages we simply call
352 -- Error_Msg_Internal to place the message in the requested location.
354 if Instantiation (Sindex) = No_Location then
355 Error_Msg_Internal (Msg, Flag_Location, Flag_Location, False);
359 -- If we are trying to flag an error in an instantiation, we may have
360 -- a generic contract violation. What we generate in this case is:
362 -- instantiation error at ...
363 -- original error message
367 -- warning: in instantiation at
368 -- warning: original warning message
370 -- All these messages are posted at the location of the top level
371 -- instantiation. If there are nested instantiations, then the
372 -- instantiation error message can be repeated, pointing to each
373 -- of the relevant instantiations.
375 -- Note: the instantiation mechanism is also shared for inlining of
376 -- subprogram bodies when front end inlining is done. In this case the
377 -- messages have the form:
379 -- in inlined body at ...
380 -- original error message
384 -- warning: in inlined body at
385 -- warning: original warning message
387 -- OK, here we have an instantiation error, and we need to generate the
388 -- error on the instantiation, rather than on the template.
391 Actual_Error_Loc : Source_Ptr;
392 -- Location of outer level instantiation in instantiation case, or
393 -- just a copy of Flag_Location in the normal case. This is the
394 -- location where all error messages will actually be posted.
396 Save_Error_Msg_Sloc : constant Source_Ptr := Error_Msg_Sloc;
397 -- Save possible location set for caller's message. We need to use
398 -- Error_Msg_Sloc for the location of the instantiation error but we
399 -- have to preserve a possible original value.
401 X : Source_File_Index;
403 Msg_Cont_Status : Boolean;
404 -- Used to label continuation lines in instantiation case with
405 -- proper Msg_Cont status.
408 -- Loop to find highest level instantiation, where all error
409 -- messages will be placed.
413 Actual_Error_Loc := Instantiation (X);
414 X := Get_Source_File_Index (Actual_Error_Loc);
415 exit when Instantiation (X) = No_Location;
418 -- Since we are generating the messages at the instantiation point in
419 -- any case, we do not want the references to the bad lines in the
420 -- instance to be annotated with the location of the instantiation.
422 Suppress_Instance_Location := True;
423 Msg_Cont_Status := False;
425 -- Loop to generate instantiation messages
427 Error_Msg_Sloc := Flag_Location;
428 X := Get_Source_File_Index (Flag_Location);
429 while Instantiation (X) /= No_Location loop
431 -- Suppress instantiation message on continuation lines
433 if Msg (Msg'First) /= '\' then
435 -- Case of inlined body
437 if Inlined_Body (X) then
438 if Is_Warning_Msg or else Is_Style_Msg then
440 ("?in inlined body #",
441 Actual_Error_Loc, Flag_Location, Msg_Cont_Status);
445 ("error in inlined body #",
446 Actual_Error_Loc, Flag_Location, Msg_Cont_Status);
449 -- Case of generic instantiation
452 if Is_Warning_Msg or else Is_Style_Msg then
454 ("?in instantiation #",
455 Actual_Error_Loc, Flag_Location, Msg_Cont_Status);
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_F (Msg : String; N : Node_Id) is
626 Error_Msg_NEL (Msg, N, N, Sloc (First_Node (N)));
633 procedure Error_Msg_FE
636 E : Node_Or_Entity_Id)
639 Error_Msg_NEL (Msg, N, E, Sloc (First_Node (N)));
642 ------------------------
643 -- Error_Msg_Internal --
644 ------------------------
646 procedure Error_Msg_Internal
652 Next_Msg : Error_Msg_Id;
653 -- Pointer to next message at insertion point
655 Prev_Msg : Error_Msg_Id;
656 -- Pointer to previous message at insertion point
658 Temp_Msg : Error_Msg_Id;
660 procedure Handle_Serious_Error;
661 -- Internal procedure to do all error message handling for a serious
662 -- error message, other than bumping the error counts and arranging
663 -- for the message to be output.
665 --------------------------
666 -- Handle_Serious_Error --
667 --------------------------
669 procedure Handle_Serious_Error is
671 -- Turn off code generation if not done already
673 if Operating_Mode = Generate_Code then
674 Operating_Mode := Check_Semantics;
675 Expander_Active := False;
678 -- Set the fatal error flag in the unit table unless we are in
679 -- Try_Semantics mode. This stops the semantics from being performed
680 -- if we find a serious error. This is skipped if we are currently
681 -- dealing with the configuration pragma file.
683 if not Try_Semantics and then Current_Source_Unit /= No_Unit then
684 Set_Fatal_Error (Get_Source_Unit (Sptr));
686 end Handle_Serious_Error;
688 -- Start of processing for Error_Msg_Internal
691 if Raise_Exception_On_Error /= 0 then
692 raise Error_Msg_Exception;
695 Continuation := Msg_Cont;
696 Continuation_New_Line := False;
697 Suppress_Message := False;
698 Kill_Message := False;
699 Set_Msg_Text (Msg, Sptr);
701 -- Kill continuation if parent message killed
703 if Continuation and Last_Killed then
707 -- Return without doing anything if message is suppressed
710 and then not All_Errors_Mode
711 and then not Is_Warning_Msg
712 and then Msg (Msg'Last) /= '!'
714 if not Continuation then
721 -- Return without doing anything if message is killed and this is not
722 -- the first error message. The philosophy is that if we get a weird
723 -- error message and we already have had a message, then we hope the
724 -- weird message is a junk cascaded message
727 and then not All_Errors_Mode
728 and then Total_Errors_Detected /= 0
730 if not Continuation then
737 -- Special check for warning message to see if it should be output
739 if Is_Warning_Msg then
741 -- Immediate return if warning message and warnings are suppressed
743 if Warnings_Suppressed (Optr) or else Warnings_Suppressed (Sptr) then
744 Cur_Msg := No_Error_Msg;
748 -- If the flag location is in the main extended source unit then for
749 -- sure we want the warning since it definitely belongs
751 if In_Extended_Main_Source_Unit (Sptr) then
754 -- If the flag location is not in the main extended source unit, then
755 -- we want to eliminate the warning, unless it is in the extended
756 -- main code unit and we want warnings on the instance.
758 elsif In_Extended_Main_Code_Unit (Sptr) and then Warn_On_Instance then
761 -- Keep warning if debug flag G set
763 elsif Debug_Flag_GG then
766 -- Keep warning if message text ends in !!
768 elsif Msg (Msg'Last) = '!' and then Msg (Msg'Last - 1) = '!' then
771 -- Here is where we delete a warning from a with'ed unit
774 Cur_Msg := No_Error_Msg;
776 if not Continuation then
784 -- If message is to be ignored in special ignore message mode, this is
785 -- where we do this special processing, bypassing message output.
787 if Ignore_Errors_Enable > 0 then
788 if Is_Serious_Error then
789 Handle_Serious_Error;
795 -- If error message line length set, and this is a continuation message
796 -- then all we do is to append the text to the text of the last message
797 -- with a comma space separator (eliminating a possible (style) or
800 if Error_Msg_Line_Length /= 0
801 and then Continuation
803 Cur_Msg := Errors.Last;
806 Oldm : String_Ptr := Errors.Table (Cur_Msg).Text;
807 Newm : String (1 .. Oldm'Last + 2 + Msglen);
812 -- First copy old message to new one and free it
814 Newm (Oldm'Range) := Oldm.all;
818 -- Remove (style) or info: at start of message
820 if Msglen > 8 and then Msg_Buffer (1 .. 8) = "(style) " then
823 elsif Msglen > 6 and then Msg_Buffer (1 .. 6) = "info: " then
830 -- Now deal with separation between messages. Normally this is
831 -- simply comma space, but there are some special cases.
833 -- If continuation new line, then put actual NL character in msg
835 if Continuation_New_Line then
837 Newm (Newl) := ASCII.LF;
839 -- If continuation message is enclosed in parentheses, then
840 -- special treatment (don't need a comma, and we want to combine
841 -- successive parenthetical remarks into a single one with
842 -- separating commas).
844 elsif Msg_Buffer (M) = '(' and then Msg_Buffer (Msglen) = ')' then
846 -- Case where existing message ends in right paren, remove
847 -- and separate parenthetical remarks with a comma.
849 if Newm (Newl) = ')' then
851 Msg_Buffer (M) := ' ';
853 -- Case where we are adding new parenthetical comment
860 -- Case where continuation not in parens and no new line
863 Newm (Newl + 1 .. Newl + 2) := ", ";
867 -- Append new message
869 Newm (Newl + 1 .. Newl + Msglen - M + 1) :=
870 Msg_Buffer (M .. Msglen);
871 Newl := Newl + Msglen - M + 1;
872 Errors.Table (Cur_Msg).Text := new String'(Newm (1 .. Newl));
878 -- Otherwise build error message object for new message
881 ((Text => new String'(Msg_Buffer (1 .. Msglen)),
882 Next => No_Error_Msg,
883 Prev => No_Error_Msg,
886 Sfile => Get_Source_File_Index (Sptr),
887 Line => Get_Physical_Line_Number (Sptr),
888 Col => Get_Column_Number (Sptr),
889 Warn => Is_Warning_Msg,
890 Style => Is_Style_Msg,
891 Serious => Is_Serious_Error,
892 Uncond => Is_Unconditional_Msg,
893 Msg_Cont => Continuation,
895 Cur_Msg := Errors.Last;
897 -- If immediate errors mode set, output error message now. Also output
898 -- now if the -d1 debug flag is set (so node number message comes out
899 -- just before actual error message)
901 if Debug_Flag_OO or else Debug_Flag_1 then
904 (Errors.Table (Cur_Msg).Line, Errors.Table (Cur_Msg).Sfile, True);
906 Output_Error_Msgs (Temp_Msg);
908 -- If not in immediate errors mode, then we insert the message in the
909 -- error chain for later output by Finalize. The messages are sorted
910 -- first by unit (main unit comes first), and within a unit by source
911 -- location (earlier flag location first in the chain).
914 -- First a quick check, does this belong at the very end of the chain
915 -- of error messages. This saves a lot of time in the normal case if
916 -- there are lots of messages.
918 if Last_Error_Msg /= No_Error_Msg
919 and then Errors.Table (Cur_Msg).Sfile =
920 Errors.Table (Last_Error_Msg).Sfile
921 and then (Sptr > Errors.Table (Last_Error_Msg).Sptr
923 (Sptr = Errors.Table (Last_Error_Msg).Sptr
925 Optr > Errors.Table (Last_Error_Msg).Optr))
927 Prev_Msg := Last_Error_Msg;
928 Next_Msg := No_Error_Msg;
930 -- Otherwise do a full sequential search for the insertion point
933 Prev_Msg := No_Error_Msg;
934 Next_Msg := First_Error_Msg;
935 while Next_Msg /= No_Error_Msg loop
937 Errors.Table (Cur_Msg).Sfile < Errors.Table (Next_Msg).Sfile;
939 if Errors.Table (Cur_Msg).Sfile =
940 Errors.Table (Next_Msg).Sfile
942 exit when Sptr < Errors.Table (Next_Msg).Sptr
944 (Sptr = Errors.Table (Next_Msg).Sptr
946 Optr < Errors.Table (Next_Msg).Optr);
949 Prev_Msg := Next_Msg;
950 Next_Msg := Errors.Table (Next_Msg).Next;
954 -- Now we insert the new message in the error chain. The insertion
955 -- point for the message is after Prev_Msg and before Next_Msg.
957 -- The possible insertion point for the new message is after Prev_Msg
958 -- and before Next_Msg. However, this is where we do a special check
959 -- for redundant parsing messages, defined as messages posted on the
960 -- same line. The idea here is that probably such messages are junk
961 -- from the parser recovering. In full errors mode, we don't do this
962 -- deletion, but otherwise such messages are discarded at this stage.
964 if Prev_Msg /= No_Error_Msg
965 and then Errors.Table (Prev_Msg).Line =
966 Errors.Table (Cur_Msg).Line
967 and then Errors.Table (Prev_Msg).Sfile =
968 Errors.Table (Cur_Msg).Sfile
969 and then Compiler_State = Parsing
970 and then not All_Errors_Mode
972 -- Don't delete unconditional messages and at this stage, don't
973 -- delete continuation lines (we attempted to delete those earlier
974 -- if the parent message was deleted.
976 if not Errors.Table (Cur_Msg).Uncond
977 and then not Continuation
979 -- Don't delete if prev msg is warning and new msg is an error.
980 -- This is because we don't want a real error masked by a
981 -- warning. In all other cases (that is parse errors for the
982 -- same line that are not unconditional) we do delete the
983 -- message. This helps to avoid junk extra messages from
984 -- cascaded parsing errors
986 if not (Errors.Table (Prev_Msg).Warn
988 Errors.Table (Prev_Msg).Style)
990 (Errors.Table (Cur_Msg).Warn
992 Errors.Table (Cur_Msg).Style)
994 -- All tests passed, delete the message by simply returning
995 -- without any further processing.
997 if not Continuation then
1006 -- Come here if message is to be inserted in the error chain
1008 if not Continuation then
1009 Last_Killed := False;
1012 if Prev_Msg = No_Error_Msg then
1013 First_Error_Msg := Cur_Msg;
1015 Errors.Table (Prev_Msg).Next := Cur_Msg;
1018 Errors.Table (Cur_Msg).Next := Next_Msg;
1020 if Next_Msg = No_Error_Msg then
1021 Last_Error_Msg := Cur_Msg;
1025 -- Bump appropriate statistics count
1027 if Errors.Table (Cur_Msg).Warn or else Errors.Table (Cur_Msg).Style then
1028 Warnings_Detected := Warnings_Detected + 1;
1031 Total_Errors_Detected := Total_Errors_Detected + 1;
1033 if Errors.Table (Cur_Msg).Serious then
1034 Serious_Errors_Detected := Serious_Errors_Detected + 1;
1035 Handle_Serious_Error;
1039 -- If too many warnings turn off warnings
1041 if Maximum_Messages /= 0 then
1042 if Warnings_Detected = Maximum_Messages then
1043 Warning_Mode := Suppress;
1046 -- If too many errors abandon compilation
1048 if Total_Errors_Detected = Maximum_Messages then
1049 raise Unrecoverable_Error;
1052 end Error_Msg_Internal;
1058 procedure Error_Msg_N (Msg : String; N : Node_Or_Entity_Id) is
1060 Error_Msg_NEL (Msg, N, N, Sloc (N));
1067 procedure Error_Msg_NE
1069 N : Node_Or_Entity_Id;
1070 E : Node_Or_Entity_Id)
1073 Error_Msg_NEL (Msg, N, E, Sloc (N));
1080 procedure Error_Msg_NEL
1082 N : Node_Or_Entity_Id;
1083 E : Node_Or_Entity_Id;
1084 Flag_Location : Source_Ptr)
1087 if Special_Msg_Delete (Msg, N, E) then
1091 Test_Style_Warning_Serious_Msg (Msg);
1093 -- Special handling for warning messages
1095 if Is_Warning_Msg then
1097 -- Suppress if no warnings set for either entity or node
1099 if No_Warnings (N) or else No_Warnings (E) then
1101 -- Disable any continuation messages as well
1103 Last_Killed := True;
1107 -- Suppress if inside loop that is known to be null or is probably
1108 -- null (case where loop executes only if invalid values present).
1109 -- In either case warnings in the loop are likely to be junk.
1116 while Present (P) loop
1117 if Nkind (P) = N_Loop_Statement
1118 and then Suppress_Loop_Warnings (P)
1128 -- Test for message to be output
1131 or else Msg (Msg'Last) = '!'
1132 or else Is_Warning_Msg
1134 or else (Msg (Msg'First) = '\' and then not Last_Killed)
1137 Error_Msg_Node_1 := E;
1138 Error_Msg (Msg, Flag_Location);
1141 Last_Killed := True;
1144 if not (Is_Warning_Msg or Is_Style_Msg) then
1153 procedure Error_Msg_NW
1156 N : Node_Or_Entity_Id)
1160 and then In_Extended_Main_Source_Unit (N)
1161 and then Comes_From_Source (N)
1163 Error_Msg_NEL (Msg, N, N, Sloc (N));
1171 procedure Error_Msg_S (Msg : String) is
1173 Error_Msg (Msg, Scan_Ptr);
1180 procedure Error_Msg_SC (Msg : String) is
1182 -- If we are at end of file, post the flag after the previous token
1184 if Token = Tok_EOF then
1187 -- For all other cases the message is posted at the current token
1191 Error_Msg (Msg, Token_Ptr);
1199 procedure Error_Msg_SP (Msg : String) is
1201 -- Note: in the case where there is no previous token, Prev_Token_Ptr
1202 -- is set to Source_First, which is a reasonable position for the
1203 -- error flag in this situation
1205 Error_Msg (Msg, Prev_Token_Ptr);
1212 procedure Finalize (Last_Call : Boolean) is
1217 procedure Delete_Warning (E : Error_Msg_Id);
1218 -- Delete a message if not already deleted and adjust warning count
1220 --------------------
1221 -- Delete_Warning --
1222 --------------------
1224 procedure Delete_Warning (E : Error_Msg_Id) is
1226 if not Errors.Table (E).Deleted then
1227 Errors.Table (E).Deleted := True;
1228 Warnings_Detected := Warnings_Detected - 1;
1232 -- Start of message for Finalize
1235 -- Set Prev pointers
1237 Cur := First_Error_Msg;
1238 while Cur /= No_Error_Msg loop
1239 Nxt := Errors.Table (Cur).Next;
1240 exit when Nxt = No_Error_Msg;
1241 Errors.Table (Nxt).Prev := Cur;
1245 -- Eliminate any duplicated error messages from the list. This is
1246 -- done after the fact to avoid problems with Change_Error_Text.
1248 Cur := First_Error_Msg;
1249 while Cur /= No_Error_Msg loop
1250 Nxt := Errors.Table (Cur).Next;
1253 while F /= No_Error_Msg
1254 and then Errors.Table (F).Sptr = Errors.Table (Cur).Sptr
1256 Check_Duplicate_Message (Cur, F);
1257 F := Errors.Table (F).Next;
1263 -- Mark any messages suppressed by specific warnings as Deleted
1265 Cur := First_Error_Msg;
1266 while Cur /= No_Error_Msg loop
1267 if not Errors.Table (Cur).Deleted
1268 and then Warning_Specifically_Suppressed
1269 (Errors.Table (Cur).Sptr, Errors.Table (Cur).Text)
1271 Delete_Warning (Cur);
1273 -- If this is a continuation, delete previous messages
1276 while Errors.Table (F).Msg_Cont loop
1277 F := Errors.Table (F).Prev;
1281 -- Delete any following continuations
1285 F := Errors.Table (F).Next;
1286 exit when F = No_Error_Msg;
1287 exit when not Errors.Table (F).Msg_Cont;
1292 Cur := Errors.Table (Cur).Next;
1295 Finalize_Called := True;
1297 -- Check consistency of specific warnings (may add warnings). We only
1298 -- do this on the last call, after all possible warnings are posted.
1301 Validate_Specific_Warnings (Error_Msg'Access);
1309 function First_Node (C : Node_Id) return Node_Id is
1310 Orig : constant Node_Id := Original_Node (C);
1311 Loc : constant Source_Ptr := Sloc (Orig);
1312 Sfile : constant Source_File_Index := Get_Source_File_Index (Loc);
1316 function Test_Earlier (N : Node_Id) return Traverse_Result;
1317 -- Function applied to every node in the construct
1319 procedure Search_Tree_First is new Traverse_Proc (Test_Earlier);
1320 -- Create traversal procedure
1326 function Test_Earlier (N : Node_Id) return Traverse_Result is
1327 Norig : constant Node_Id := Original_Node (N);
1328 Loc : constant Source_Ptr := Sloc (Norig);
1331 -- Check for earlier
1335 -- Ignore nodes with no useful location information
1337 and then Loc /= Standard_Location
1338 and then Loc /= No_Location
1340 -- Ignore nodes from a different file. This ensures against cases
1341 -- of strange foreign code somehow being present. We don't want
1342 -- wild placement of messages if that happens.
1344 and then Get_Source_File_Index (Loc) = Sfile
1353 -- Start of processing for First_Node
1356 if Nkind (Orig) in N_Subexpr then
1359 Search_Tree_First (Orig);
1371 function First_Sloc (N : Node_Id) return Source_Ptr is
1372 SI : constant Source_File_Index := Source_Index (Get_Source_Unit (N));
1373 SF : constant Source_Ptr := Source_First (SI);
1378 F := First_Node (N);
1381 -- The following circuit is a bit subtle. When we have parenthesized
1382 -- expressions, then the Sloc will not record the location of the paren,
1383 -- but we would like to post the flag on the paren. So what we do is to
1384 -- crawl up the tree from the First_Node, adjusting the Sloc value for
1385 -- any parentheses we know are present. Yes, we know this circuit is not
1386 -- 100% reliable (e.g. because we don't record all possible paren level
1387 -- values), but this is only for an error message so it is good enough.
1390 Paren_Loop : for J in 1 .. Paren_Count (F) loop
1392 -- We don't look more than 12 characters behind the current
1393 -- location, and in any case not past the front of the source.
1395 Search_Loop : for K in 1 .. 12 loop
1396 exit Search_Loop when S = SF;
1398 if Source_Text (SI) (S - 1) = '(' then
1402 elsif Source_Text (SI) (S - 1) <= ' ' then
1408 end loop Search_Loop;
1409 end loop Paren_Loop;
1411 exit Node_Loop when F = N;
1413 exit Node_Loop when Nkind (F) not in N_Subexpr;
1423 procedure Initialize is
1426 First_Error_Msg := No_Error_Msg;
1427 Last_Error_Msg := No_Error_Msg;
1428 Serious_Errors_Detected := 0;
1429 Total_Errors_Detected := 0;
1430 Warnings_Detected := 0;
1431 Cur_Msg := No_Error_Msg;
1434 -- Initialize warnings table, if all warnings are suppressed, supply an
1435 -- initial dummy entry covering all possible source locations.
1438 Specific_Warnings.Init;
1440 if Warning_Mode = Suppress then
1442 ((Start => Source_Ptr'First, Stop => Source_Ptr'Last));
1450 function No_Warnings (N : Node_Or_Entity_Id) return Boolean is
1452 if Error_Posted (N) then
1455 elsif Nkind (N) in N_Entity and then Has_Warnings_Off (N) then
1458 elsif Is_Entity_Name (N)
1459 and then Present (Entity (N))
1460 and then Has_Warnings_Off (Entity (N))
1473 function OK_Node (N : Node_Id) return Boolean is
1474 K : constant Node_Kind := Nkind (N);
1477 if Error_Posted (N) then
1480 elsif K in N_Has_Etype
1481 and then Present (Etype (N))
1482 and then Error_Posted (Etype (N))
1487 or else K = N_Attribute_Reference
1488 or else K = N_Character_Literal
1489 or else K = N_Expanded_Name
1490 or else K = N_Identifier
1491 or else K = N_Operator_Symbol)
1492 and then Present (Entity (N))
1493 and then Error_Posted (Entity (N))
1501 ---------------------
1502 -- Output_Messages --
1503 ---------------------
1505 procedure Output_Messages is
1509 procedure Write_Error_Summary;
1510 -- Write error summary
1512 procedure Write_Header (Sfile : Source_File_Index);
1513 -- Write header line (compiling or checking given file)
1515 procedure Write_Max_Errors;
1516 -- Write message if max errors reached
1518 -------------------------
1519 -- Write_Error_Summary --
1520 -------------------------
1522 procedure Write_Error_Summary is
1524 -- Extra blank line if error messages or source listing were output
1526 if Total_Errors_Detected + Warnings_Detected > 0
1532 -- Message giving number of lines read and number of errors detected.
1533 -- This normally goes to Standard_Output. The exception is when brief
1534 -- mode is not set, verbose mode (or full list mode) is set, and
1535 -- there are errors. In this case we send the message to standard
1536 -- error to make sure that *something* appears on standard error in
1537 -- an error situation.
1539 -- Formerly, only the "# errors" suffix was sent to stderr, whereas
1540 -- "# lines:" appeared on stdout. This caused problems on VMS when
1541 -- the stdout buffer was flushed, giving an extra line feed after
1544 if Total_Errors_Detected + Warnings_Detected /= 0
1545 and then not Brief_Output
1546 and then (Verbose_Mode or Full_List)
1551 -- Message giving total number of lines
1554 Write_Int (Num_Source_Lines (Main_Source_File));
1556 if Num_Source_Lines (Main_Source_File) = 1 then
1557 Write_Str (" line: ");
1559 Write_Str (" lines: ");
1562 if Total_Errors_Detected = 0 then
1563 Write_Str ("No errors");
1565 elsif Total_Errors_Detected = 1 then
1566 Write_Str ("1 error");
1569 Write_Int (Total_Errors_Detected);
1570 Write_Str (" errors");
1573 if Warnings_Detected /= 0 then
1575 Write_Int (Warnings_Detected);
1576 Write_Str (" warning");
1578 if Warnings_Detected /= 1 then
1582 if Warning_Mode = Treat_As_Error then
1583 Write_Str (" (treated as error");
1585 if Warnings_Detected /= 1 then
1594 Set_Standard_Output;
1595 end Write_Error_Summary;
1601 procedure Write_Header (Sfile : Source_File_Index) is
1603 if Verbose_Mode or Full_List then
1604 if Original_Operating_Mode = Generate_Code then
1605 Write_Str ("Compiling: ");
1607 Write_Str ("Checking: ");
1610 Write_Name (Full_File_Name (Sfile));
1612 if not Debug_Flag_7 then
1613 Write_Str (" (source file time stamp: ");
1614 Write_Time_Stamp (Sfile);
1622 ----------------------
1623 -- Write_Max_Errors --
1624 ----------------------
1626 procedure Write_Max_Errors is
1628 if Maximum_Messages /= 0 then
1629 if Warnings_Detected >= Maximum_Messages then
1631 Write_Line ("maximum number of warnings output");
1632 Write_Line ("any further warnings suppressed");
1633 Set_Standard_Output;
1636 -- If too many errors print message
1638 if Total_Errors_Detected >= Maximum_Messages then
1640 Write_Line ("fatal error: maximum number of errors detected");
1641 Set_Standard_Output;
1644 end Write_Max_Errors;
1646 -- Start of processing for Output_Messages
1649 -- Error if Finalize has not been called
1651 if not Finalize_Called then
1652 raise Program_Error;
1655 -- Reset current error source file if the main unit has a pragma
1656 -- Source_Reference. This ensures outputting the proper name of
1657 -- the source file in this situation.
1659 if Main_Source_File = No_Source_File
1660 or else Num_SRef_Pragmas (Main_Source_File) /= 0
1662 Current_Error_Source_File := No_Source_File;
1667 if Brief_Output or (not Full_List and not Verbose_Mode) then
1670 E := First_Error_Msg;
1671 while E /= No_Error_Msg loop
1672 if not Errors.Table (E).Deleted and then not Debug_Flag_KK then
1673 if Full_Path_Name_For_Brief_Errors then
1674 Write_Name (Full_Ref_Name (Errors.Table (E).Sfile));
1676 Write_Name (Reference_Name (Errors.Table (E).Sfile));
1680 Write_Int (Int (Physical_To_Logical
1681 (Errors.Table (E).Line,
1682 Errors.Table (E).Sfile)));
1685 if Errors.Table (E).Col < 10 then
1689 Write_Int (Int (Errors.Table (E).Col));
1691 Output_Msg_Text (E);
1695 E := Errors.Table (E).Next;
1698 Set_Standard_Output;
1701 -- Full source listing case
1704 List_Pragmas_Index := 1;
1705 List_Pragmas_Mode := True;
1706 E := First_Error_Msg;
1708 -- Normal case, to stdout (copyright notice already output)
1710 if Full_List_File_Name = null then
1711 if not Debug_Flag_7 then
1718 Create_List_File_Access.all (Full_List_File_Name.all);
1719 Set_Special_Output (Write_List_Info_Access.all'Access);
1721 -- Write copyright notice to file
1723 if not Debug_Flag_7 then
1724 Write_Str ("GNAT ");
1725 Write_Str (Gnat_Version_String);
1727 Write_Str ("Copyright 1992-" &
1729 ", Free Software Foundation, Inc.");
1734 -- First list extended main source file units with errors
1736 for U in Main_Unit .. Last_Unit loop
1737 if In_Extended_Main_Source_Unit (Cunit_Entity (U))
1739 -- If debug flag d.m is set, only the main source is listed
1741 and then (U = Main_Unit or else not Debug_Flag_Dot_M)
1743 -- If the unit of the entity does not come from source, it is
1744 -- an implicit subprogram declaration for a child subprogram.
1745 -- Do not emit errors for it, they are listed with the body.
1748 (No (Cunit_Entity (U))
1749 or else Comes_From_Source (Cunit_Entity (U))
1750 or else not Is_Subprogram (Cunit_Entity (U)))
1753 Sfile : constant Source_File_Index := Source_Index (U);
1757 Write_Header (Sfile);
1760 -- Normally, we don't want an "error messages from file"
1761 -- message when listing the entire file, so we set the
1762 -- current source file as the current error source file.
1763 -- However, the old style of doing things was to list this
1764 -- message if pragma Source_Reference is present, even for
1765 -- the main unit. Since the purpose of the -gnatd.m switch
1766 -- is to duplicate the old behavior, we skip the reset if
1767 -- this debug flag is set.
1769 if not Debug_Flag_Dot_M then
1770 Current_Error_Source_File := Sfile;
1773 for N in 1 .. Last_Source_Line (Sfile) loop
1774 while E /= No_Error_Msg
1775 and then Errors.Table (E).Deleted
1777 E := Errors.Table (E).Next;
1782 and then Errors.Table (E).Line = N
1783 and then Errors.Table (E).Sfile = Sfile;
1785 Output_Source_Line (N, Sfile, Err_Flag);
1788 Output_Error_Msgs (E);
1790 if not Debug_Flag_2 then
1799 -- Then output errors, if any, for subsidiary units not in the
1800 -- main extended unit.
1802 -- Note: if debug flag d.m set, include errors for any units other
1803 -- than the main unit in the extended source unit (e.g. spec and
1804 -- subunits for a body).
1806 while E /= No_Error_Msg
1807 and then (not In_Extended_Main_Source_Unit (Errors.Table (E).Sptr)
1810 and then Get_Source_Unit
1811 (Errors.Table (E).Sptr) /= Main_Unit))
1813 if Errors.Table (E).Deleted then
1814 E := Errors.Table (E).Next;
1819 (Errors.Table (E).Line, Errors.Table (E).Sfile, True);
1820 Output_Error_Msgs (E);
1824 -- If output to file, write extra copy of error summary to the
1825 -- output file, and then close it.
1827 if Full_List_File_Name /= null then
1828 Write_Error_Summary;
1830 Close_List_File_Access.all;
1831 Cancel_Special_Output;
1835 -- Verbose mode (error lines only with error flags). Normally this is
1836 -- ignored in full list mode, unless we are listing to a file, in which
1837 -- case we still generate -gnatv output to standard output.
1840 and then (not Full_List or else Full_List_File_Name /= null)
1843 Write_Header (Main_Source_File);
1844 E := First_Error_Msg;
1846 -- Loop through error lines
1848 while E /= No_Error_Msg loop
1849 if Errors.Table (E).Deleted then
1850 E := Errors.Table (E).Next;
1854 (Errors.Table (E).Line, Errors.Table (E).Sfile, True);
1855 Output_Error_Msgs (E);
1860 -- Output error summary if verbose or full list mode
1862 if Verbose_Mode or else Full_List then
1863 Write_Error_Summary;
1868 if Warning_Mode = Treat_As_Error then
1869 Total_Errors_Detected := Total_Errors_Detected + Warnings_Detected;
1870 Warnings_Detected := 0;
1872 end Output_Messages;
1874 ------------------------
1875 -- Output_Source_Line --
1876 ------------------------
1878 procedure Output_Source_Line
1879 (L : Physical_Line_Number;
1880 Sfile : Source_File_Index;
1886 Line_Number_Output : Boolean := False;
1887 -- Set True once line number is output
1889 Empty_Line : Boolean := True;
1890 -- Set False if line includes at least one character
1893 if Sfile /= Current_Error_Source_File then
1894 Write_Str ("==============Error messages for ");
1896 case Sinput.File_Type (Sfile) is
1898 Write_Str ("source");
1900 when Sinput.Config =>
1901 Write_Str ("configuration pragmas");
1904 Write_Str ("symbol definition");
1906 when Sinput.Preproc =>
1907 Write_Str ("preprocessing data");
1910 Write_Str (" file: ");
1911 Write_Name (Full_File_Name (Sfile));
1914 if Num_SRef_Pragmas (Sfile) > 0 then
1915 Write_Str ("--------------Line numbers from file: ");
1916 Write_Name (Full_Ref_Name (Sfile));
1917 Write_Str (" (starting at line ");
1918 Write_Int (Int (First_Mapped_Line (Sfile)));
1923 Current_Error_Source_File := Sfile;
1926 if Errs or List_Pragmas_Mode then
1927 Output_Line_Number (Physical_To_Logical (L, Sfile));
1928 Line_Number_Output := True;
1931 S := Line_Start (L, Sfile);
1934 C := Source_Text (Sfile) (S);
1935 exit when C = ASCII.LF or else C = ASCII.CR or else C = EOF;
1937 -- Deal with matching entry in List_Pragmas table
1940 and then List_Pragmas_Index <= List_Pragmas.Last
1941 and then S = List_Pragmas.Table (List_Pragmas_Index).Ploc
1943 case List_Pragmas.Table (List_Pragmas_Index).Ptyp is
1947 -- Ignore if on line with errors so that error flags
1948 -- get properly listed with the error line .
1951 Write_Char (ASCII.FF);
1955 List_Pragmas_Mode := True;
1957 if not Line_Number_Output then
1958 Output_Line_Number (Physical_To_Logical (L, Sfile));
1959 Line_Number_Output := True;
1966 List_Pragmas_Mode := False;
1969 List_Pragmas_Index := List_Pragmas_Index + 1;
1971 -- Normal case (no matching entry in List_Pragmas table)
1974 if Errs or List_Pragmas_Mode then
1979 Empty_Line := False;
1983 -- If we have output a source line, then add the line terminator, with
1984 -- training spaces preserved (so we output the line exactly as input).
1986 if Line_Number_Output then
1990 Write_Eol_Keep_Blanks;
1993 end Output_Source_Line;
1995 -----------------------------
1996 -- Remove_Warning_Messages --
1997 -----------------------------
1999 procedure Remove_Warning_Messages (N : Node_Id) is
2001 function Check_For_Warning (N : Node_Id) return Traverse_Result;
2002 -- This function checks one node for a possible warning message
2004 function Check_All_Warnings is new Traverse_Func (Check_For_Warning);
2005 -- This defines the traversal operation
2007 -----------------------
2008 -- Check_For_Warning --
2009 -----------------------
2011 function Check_For_Warning (N : Node_Id) return Traverse_Result is
2012 Loc : constant Source_Ptr := Sloc (N);
2015 function To_Be_Removed (E : Error_Msg_Id) return Boolean;
2016 -- Returns True for a message that is to be removed. Also adjusts
2017 -- warning count appropriately.
2023 function To_Be_Removed (E : Error_Msg_Id) return Boolean is
2025 if E /= No_Error_Msg
2027 -- Don't remove if location does not match
2029 and then Errors.Table (E).Optr = Loc
2031 -- Don't remove if not warning/info message. Note that we do
2032 -- not remove style messages here. They are warning messages
2033 -- but not ones we want removed in this context.
2035 and then Errors.Table (E).Warn
2037 -- Don't remove unconditional messages
2039 and then not Errors.Table (E).Uncond
2041 Warnings_Detected := Warnings_Detected - 1;
2044 -- No removal required
2051 -- Start of processing for Check_For_Warnings
2054 while To_Be_Removed (First_Error_Msg) loop
2055 First_Error_Msg := Errors.Table (First_Error_Msg).Next;
2058 if First_Error_Msg = No_Error_Msg then
2059 Last_Error_Msg := No_Error_Msg;
2062 E := First_Error_Msg;
2063 while E /= No_Error_Msg loop
2064 while To_Be_Removed (Errors.Table (E).Next) loop
2065 Errors.Table (E).Next :=
2066 Errors.Table (Errors.Table (E).Next).Next;
2068 if Errors.Table (E).Next = No_Error_Msg then
2069 Last_Error_Msg := E;
2073 E := Errors.Table (E).Next;
2076 if Nkind (N) = N_Raise_Constraint_Error
2077 and then Original_Node (N) /= N
2078 and then No (Condition (N))
2080 -- Warnings may have been posted on subexpressions of the original
2081 -- tree. We place the original node back on the tree to remove
2082 -- those warnings, whose sloc do not match those of any node in
2083 -- the current tree. Given that we are in unreachable code, this
2084 -- modification to the tree is harmless.
2087 Status : Traverse_Final_Result;
2090 if Is_List_Member (N) then
2091 Set_Condition (N, Original_Node (N));
2092 Status := Check_All_Warnings (Condition (N));
2094 Rewrite (N, Original_Node (N));
2095 Status := Check_All_Warnings (N);
2104 end Check_For_Warning;
2106 -- Start of processing for Remove_Warning_Messages
2109 if Warnings_Detected /= 0 then
2111 Discard : Traverse_Final_Result;
2112 pragma Warnings (Off, Discard);
2115 Discard := Check_All_Warnings (N);
2118 end Remove_Warning_Messages;
2120 procedure Remove_Warning_Messages (L : List_Id) is
2123 if Is_Non_Empty_List (L) then
2125 while Present (Stat) loop
2126 Remove_Warning_Messages (Stat);
2130 end Remove_Warning_Messages;
2132 ---------------------------
2133 -- Set_Identifier_Casing --
2134 ---------------------------
2136 procedure Set_Identifier_Casing
2137 (Identifier_Name : System.Address;
2138 File_Name : System.Address)
2140 Ident : constant Big_String_Ptr := To_Big_String_Ptr (Identifier_Name);
2141 File : constant Big_String_Ptr := To_Big_String_Ptr (File_Name);
2144 Desired_Case : Casing_Type := Mixed_Case;
2145 -- Casing required for result. Default value of Mixed_Case is used if
2146 -- for some reason we cannot find the right file name in the table.
2149 -- Get length of file name
2152 while File (Flen + 1) /= ASCII.NUL loop
2156 -- Loop through file names to find matching one. This is a bit slow, but
2157 -- we only do it in error situations so it is not so terrible. Note that
2158 -- if the loop does not exit, then the desired case will be left set to
2159 -- Mixed_Case, this can happen if the name was not in canonical form,
2160 -- and gets canonicalized on VMS. Possibly we could fix this by
2161 -- unconditionally canonicalizing these names ???
2163 for J in 1 .. Last_Source_File loop
2164 Get_Name_String (Full_Debug_Name (J));
2167 and then Name_Buffer (1 .. Name_Len) = String (File (1 .. Flen))
2169 Desired_Case := Identifier_Casing (J);
2174 -- Copy identifier as given to Name_Buffer
2176 for J in Name_Buffer'Range loop
2177 Name_Buffer (J) := Ident (J);
2179 if Name_Buffer (J) = ASCII.NUL then
2185 Set_Casing (Desired_Case);
2186 end Set_Identifier_Casing;
2188 ------------------------
2189 -- Set_Error_Msg_Lang --
2190 ------------------------
2192 procedure Set_Error_Msg_Lang (To : String) is
2194 Error_Msg_Lang (1) := '(';
2195 Error_Msg_Lang (2 .. To'Length + 1) := To;
2196 Error_Msg_Lang (To'Length + 2) := ')';
2197 Error_Msg_Lang (To'Length + 3) := ' ';
2198 Error_Msg_Langlen := To'Length + 3;
2199 end Set_Error_Msg_Lang;
2201 -----------------------
2202 -- Set_Ignore_Errors --
2203 -----------------------
2205 procedure Set_Ignore_Errors (To : Boolean) is
2207 Errors_Must_Be_Ignored := To;
2208 end Set_Ignore_Errors;
2210 ------------------------------
2211 -- Set_Msg_Insertion_Column --
2212 ------------------------------
2214 procedure Set_Msg_Insertion_Column is
2216 if RM_Column_Check then
2217 Set_Msg_Str (" in column ");
2218 Set_Msg_Int (Int (Error_Msg_Col) + 1);
2220 end Set_Msg_Insertion_Column;
2222 ----------------------------
2223 -- Set_Msg_Insertion_Node --
2224 ----------------------------
2226 procedure Set_Msg_Insertion_Node is
2231 Error_Msg_Node_1 = Error
2232 or else Error_Msg_Node_1 = Any_Type;
2234 if Error_Msg_Node_1 = Empty then
2235 Set_Msg_Blank_Conditional;
2236 Set_Msg_Str ("<empty>");
2238 elsif Error_Msg_Node_1 = Error then
2240 Set_Msg_Str ("<error>");
2242 elsif Error_Msg_Node_1 = Standard_Void_Type then
2244 Set_Msg_Str ("procedure name");
2247 Set_Msg_Blank_Conditional;
2251 K := Nkind (Error_Msg_Node_1);
2253 -- If we have operator case, skip quotes since name of operator
2254 -- itself will supply the required quotations. An operator can be an
2255 -- applied use in an expression or an explicit operator symbol, or an
2256 -- identifier whose name indicates it is an operator.
2259 or else K = N_Operator_Symbol
2260 or else K = N_Defining_Operator_Symbol
2261 or else ((K = N_Identifier or else K = N_Defining_Identifier)
2262 and then Is_Operator_Name (Chars (Error_Msg_Node_1)))
2264 Set_Msg_Node (Error_Msg_Node_1);
2266 -- Normal case, not an operator, surround with quotes
2270 Set_Qualification (Error_Msg_Qual_Level, Error_Msg_Node_1);
2271 Set_Msg_Node (Error_Msg_Node_1);
2276 -- The following assignment ensures that a second ampersand insertion
2277 -- character will correspond to the Error_Msg_Node_2 parameter. We
2278 -- suppress possible validity checks in case operating in -gnatVa mode,
2279 -- and Error_Msg_Node_2 is not needed and has not been set.
2282 pragma Suppress (Range_Check);
2284 Error_Msg_Node_1 := Error_Msg_Node_2;
2286 end Set_Msg_Insertion_Node;
2288 --------------------------------------
2289 -- Set_Msg_Insertion_Type_Reference --
2290 --------------------------------------
2292 procedure Set_Msg_Insertion_Type_Reference (Flag : Source_Ptr) is
2298 if Error_Msg_Node_1 = Standard_Void_Type then
2299 Set_Msg_Str ("package or procedure name");
2302 elsif Error_Msg_Node_1 = Standard_Exception_Type then
2303 Set_Msg_Str ("exception name");
2306 elsif Error_Msg_Node_1 = Any_Access
2307 or else Error_Msg_Node_1 = Any_Array
2308 or else Error_Msg_Node_1 = Any_Boolean
2309 or else Error_Msg_Node_1 = Any_Character
2310 or else Error_Msg_Node_1 = Any_Composite
2311 or else Error_Msg_Node_1 = Any_Discrete
2312 or else Error_Msg_Node_1 = Any_Fixed
2313 or else Error_Msg_Node_1 = Any_Integer
2314 or else Error_Msg_Node_1 = Any_Modular
2315 or else Error_Msg_Node_1 = Any_Numeric
2316 or else Error_Msg_Node_1 = Any_Real
2317 or else Error_Msg_Node_1 = Any_Scalar
2318 or else Error_Msg_Node_1 = Any_String
2320 Get_Unqualified_Decoded_Name_String (Chars (Error_Msg_Node_1));
2321 Set_Msg_Name_Buffer;
2324 elsif Error_Msg_Node_1 = Universal_Real then
2325 Set_Msg_Str ("type universal real");
2328 elsif Error_Msg_Node_1 = Universal_Integer then
2329 Set_Msg_Str ("type universal integer");
2332 elsif Error_Msg_Node_1 = Universal_Fixed then
2333 Set_Msg_Str ("type universal fixed");
2337 -- Special case of anonymous array
2339 if Nkind (Error_Msg_Node_1) in N_Entity
2340 and then Is_Array_Type (Error_Msg_Node_1)
2341 and then Present (Related_Array_Object (Error_Msg_Node_1))
2343 Set_Msg_Str ("type of ");
2344 Set_Msg_Node (Related_Array_Object (Error_Msg_Node_1));
2345 Set_Msg_Str (" declared");
2346 Set_Msg_Insertion_Line_Number
2347 (Sloc (Related_Array_Object (Error_Msg_Node_1)), Flag);
2351 -- If we fall through, it is not a special case, so first output
2352 -- the name of the type, preceded by private for a private type
2354 if Is_Private_Type (Error_Msg_Node_1) then
2355 Set_Msg_Str ("private type ");
2357 Set_Msg_Str ("type ");
2360 Ent := Error_Msg_Node_1;
2362 if Is_Internal_Name (Chars (Ent)) then
2363 Unwind_Internal_Type (Ent);
2366 -- Types in Standard are displayed as "Standard.name"
2368 if Sloc (Ent) <= Standard_Location then
2370 Set_Msg_Str ("Standard.");
2375 -- Types in other language defined units are displayed as
2376 -- "package-name.type-name"
2379 Is_Predefined_File_Name (Unit_File_Name (Get_Source_Unit (Ent)))
2381 Get_Unqualified_Decoded_Name_String
2382 (Unit_Name (Get_Source_Unit (Ent)));
2383 Name_Len := Name_Len - 2;
2385 Set_Casing (Mixed_Case);
2386 Set_Msg_Name_Buffer;
2388 Set_Casing (Mixed_Case);
2393 -- All other types display as "type name" defined at line xxx
2394 -- possibly qualified if qualification is requested.
2398 Set_Qualification (Error_Msg_Qual_Level, Ent);
2402 -- If Ent is an anonymous subprogram type, there is no name to print,
2403 -- so remove enclosing quotes.
2405 if Buffer_Ends_With ("""") then
2406 Buffer_Remove ("""");
2412 -- If the original type did not come from a predefined file, add the
2413 -- location where the type was defined.
2415 if Sloc (Error_Msg_Node_1) > Standard_Location
2417 not Is_Predefined_File_Name
2418 (Unit_File_Name (Get_Source_Unit (Error_Msg_Node_1)))
2420 Set_Msg_Str (" defined");
2421 Set_Msg_Insertion_Line_Number (Sloc (Error_Msg_Node_1), Flag);
2423 -- If it did come from a predefined file, deal with the case where
2424 -- this was a file with a generic instantiation from elsewhere.
2427 if Sloc (Error_Msg_Node_1) > Standard_Location then
2429 Iloc : constant Source_Ptr :=
2430 Instantiation_Location (Sloc (Error_Msg_Node_1));
2433 if Iloc /= No_Location
2434 and then not Suppress_Instance_Location
2436 Set_Msg_Str (" from instance");
2437 Set_Msg_Insertion_Line_Number (Iloc, Flag);
2442 end Set_Msg_Insertion_Type_Reference;
2444 ---------------------------------
2445 -- Set_Msg_Insertion_Unit_Name --
2446 ---------------------------------
2448 procedure Set_Msg_Insertion_Unit_Name (Suffix : Boolean := True) is
2450 if Error_Msg_Unit_1 = No_Unit_Name then
2453 elsif Error_Msg_Unit_1 = Error_Unit_Name then
2455 Set_Msg_Str ("<error>");
2458 Get_Unit_Name_String (Error_Msg_Unit_1, Suffix);
2461 Set_Msg_Name_Buffer;
2465 -- The following assignment ensures that a second percent insertion
2466 -- character will correspond to the Error_Msg_Unit_2 parameter. We
2467 -- suppress possible validity checks in case operating in -gnatVa mode,
2468 -- and Error_Msg_Unit_2 is not needed and has not been set.
2471 pragma Suppress (Range_Check);
2473 Error_Msg_Unit_1 := Error_Msg_Unit_2;
2475 end Set_Msg_Insertion_Unit_Name;
2481 procedure Set_Msg_Node (Node : Node_Id) is
2486 if Nkind (Node) = N_Designator then
2487 Set_Msg_Node (Name (Node));
2489 Set_Msg_Node (Identifier (Node));
2492 elsif Nkind (Node) = N_Defining_Program_Unit_Name then
2493 Set_Msg_Node (Name (Node));
2495 Set_Msg_Node (Defining_Identifier (Node));
2498 elsif Nkind (Node) = N_Selected_Component then
2499 Set_Msg_Node (Prefix (Node));
2501 Set_Msg_Node (Selector_Name (Node));
2505 -- The only remaining possibilities are identifiers, defining
2506 -- identifiers, pragmas, and pragma argument associations.
2508 if Nkind (Node) = N_Pragma then
2509 Nam := Pragma_Name (Node);
2511 -- The other cases have Chars fields, and we want to test for possible
2512 -- internal names, which generally represent something gone wrong. An
2513 -- exception is the case of internal type names, where we try to find a
2514 -- reasonable external representation for the external name
2516 elsif Is_Internal_Name (Chars (Node))
2518 ((Is_Entity_Name (Node)
2519 and then Present (Entity (Node))
2520 and then Is_Type (Entity (Node)))
2522 (Nkind (Node) = N_Defining_Identifier and then Is_Type (Node)))
2524 if Nkind (Node) = N_Identifier then
2525 Ent := Entity (Node);
2530 -- If the type is the designated type of an access_to_subprogram,
2531 -- there is no name to provide in the call.
2533 if Ekind (Ent) = E_Subprogram_Type then
2536 Unwind_Internal_Type (Ent);
2540 -- If not internal name, just use name in Chars field
2543 Nam := Chars (Node);
2546 -- At this stage, the name to output is in Nam
2548 Get_Unqualified_Decoded_Name_String (Nam);
2550 -- Remove trailing upper case letters from the name (useful for
2551 -- dealing with some cases of internal names.
2553 while Name_Len > 1 and then Name_Buffer (Name_Len) in 'A' .. 'Z' loop
2554 Name_Len := Name_Len - 1;
2557 -- If we have any of the names from standard that start with the
2558 -- characters "any " (e.g. Any_Type), then kill the message since
2559 -- almost certainly it is a junk cascaded message.
2562 and then Name_Buffer (1 .. 4) = "any "
2564 Kill_Message := True;
2567 -- Now we have to set the proper case. If we have a source location
2568 -- then do a check to see if the name in the source is the same name
2569 -- as the name in the Names table, except for possible differences
2570 -- in case, which is the case when we can copy from the source.
2573 Src_Loc : constant Source_Ptr := Sloc (Node);
2574 Sbuffer : Source_Buffer_Ptr;
2576 Src_Ptr : Source_Ptr;
2582 -- For standard locations, always use mixed case
2584 if Src_Loc <= No_Location
2585 or else Sloc (Node) <= No_Location
2587 Set_Casing (Mixed_Case);
2590 -- Determine if the reference we are dealing with corresponds to
2591 -- text at the point of the error reference. This will often be
2592 -- the case for simple identifier references, and is the case
2593 -- where we can copy the spelling from the source.
2595 Sbuffer := Source_Text (Get_Source_File_Index (Src_Loc));
2597 while Ref_Ptr <= Name_Len loop
2599 Fold_Lower (Sbuffer (Src_Ptr)) /=
2600 Fold_Lower (Name_Buffer (Ref_Ptr));
2601 Ref_Ptr := Ref_Ptr + 1;
2602 Src_Ptr := Src_Ptr + 1;
2605 -- If we get through the loop without a mismatch, then output the
2606 -- name the way it is spelled in the source program
2608 if Ref_Ptr > Name_Len then
2611 for J in 1 .. Name_Len loop
2612 Name_Buffer (J) := Sbuffer (Src_Ptr);
2613 Src_Ptr := Src_Ptr + 1;
2616 -- Otherwise set the casing using the default identifier casing
2619 Set_Casing (Identifier_Casing (Flag_Source), Mixed_Case);
2624 Set_Msg_Name_Buffer;
2632 procedure Set_Msg_Text (Text : String; Flag : Source_Ptr) is
2633 C : Character; -- Current character
2634 P : Natural; -- Current index;
2637 Manual_Quote_Mode := False;
2638 Is_Unconditional_Msg := False;
2640 Flag_Source := Get_Source_File_Index (Flag);
2643 while P <= Text'Last loop
2647 -- Check for insertion character or sequence
2651 if P <= Text'Last and then Text (P) = '%' then
2653 Set_Msg_Insertion_Name_Literal;
2655 Set_Msg_Insertion_Name;
2659 if P <= Text'Last and then Text (P) = '$' then
2661 Set_Msg_Insertion_Unit_Name (Suffix => False);
2663 Set_Msg_Insertion_Unit_Name;
2667 Set_Msg_Insertion_File_Name;
2670 Set_Msg_Insertion_Type_Reference (Flag);
2673 Set_Msg_Insertion_Reserved_Name;
2676 Set_Msg_Insertion_Node;
2679 Set_Msg_Insertion_Line_Number (Error_Msg_Sloc, Flag);
2682 Continuation := True;
2684 if Text (P) = '\' then
2685 Continuation_New_Line := True;
2690 Set_Msg_Insertion_Column;
2693 Set_Msg_Insertion_Run_Time_Name;
2696 Set_Msg_Insertion_Uint;
2699 Manual_Quote_Mode := not Manual_Quote_Mode;
2703 Is_Unconditional_Msg := True;
2706 null; -- already dealt with
2709 null; -- already dealt with
2712 null; -- already dealt with
2715 Set_Msg_Char (Text (P));
2719 if P <= Text'Last and then Text (P) = '~' then
2721 Set_Msg_Str (Error_Msg_Lang (1 .. Error_Msg_Langlen));
2723 Set_Msg_Str (Error_Msg_String (1 .. Error_Msg_Strlen));
2726 -- Upper case letter
2730 -- Start of reserved word if two or more
2732 if P <= Text'Last and then Text (P) in 'A' .. 'Z' then
2734 Set_Msg_Insertion_Reserved_Word (Text, P);
2736 -- Single upper case letter is just inserted
2742 -- Normal character with no special treatment
2756 procedure Set_Posted (N : Node_Id) is
2760 if Is_Serious_Error then
2762 -- We always set Error_Posted on the node itself
2764 Set_Error_Posted (N);
2766 -- If it is a subexpression, then set Error_Posted on parents up to
2767 -- and including the first non-subexpression construct. This helps
2768 -- avoid cascaded error messages within a single expression.
2774 Set_Error_Posted (P);
2775 exit when Nkind (P) not in N_Subexpr;
2778 -- A special check, if we just posted an error on an attribute
2779 -- definition clause, then also set the entity involved as posted.
2780 -- For example, this stops complaining about the alignment after
2781 -- complaining about the size, which is likely to be useless.
2783 if Nkind (P) = N_Attribute_Definition_Clause then
2784 if Is_Entity_Name (Name (P)) then
2785 Set_Error_Posted (Entity (Name (P)));
2791 -----------------------
2792 -- Set_Qualification --
2793 -----------------------
2795 procedure Set_Qualification (N : Nat; E : Entity_Id) is
2797 if N /= 0 and then Scope (E) /= Standard_Standard then
2798 Set_Qualification (N - 1, Scope (E));
2799 Set_Msg_Node (Scope (E));
2802 end Set_Qualification;
2804 ------------------------
2805 -- Special_Msg_Delete --
2806 ------------------------
2808 -- Is it really right to have all this specialized knowledge in errout?
2810 function Special_Msg_Delete
2812 N : Node_Or_Entity_Id;
2813 E : Node_Or_Entity_Id) return Boolean
2816 -- Never delete messages in -gnatdO mode
2818 if Debug_Flag_OO then
2821 -- Processing for "atomic access cannot be guaranteed"
2823 elsif Msg = "atomic access to & cannot be guaranteed" then
2825 -- When an atomic object refers to a non-atomic type in the same
2826 -- scope, we implicitly make the type atomic. In the non-error case
2827 -- this is surely safe (and in fact prevents an error from occurring
2828 -- if the type is not atomic by default). But if the object cannot be
2829 -- made atomic, then we introduce an extra junk message by this
2830 -- manipulation, which we get rid of here.
2832 -- We identify this case by the fact that it references a type for
2833 -- which Is_Atomic is set, but there is no Atomic pragma setting it.
2836 and then Is_Atomic (E)
2837 and then No (Get_Rep_Pragma (E, Name_Atomic))
2842 -- Processing for "Size too small" messages
2844 elsif Msg = "size for& too small, minimum allowed is ^" then
2846 -- Suppress "size too small" errors in CodePeer mode, since pragma
2847 -- Pack is also ignored in this configuration.
2849 if CodePeer_Mode then
2852 -- When a size is wrong for a frozen type there is no explicit size
2853 -- clause, and other errors have occurred, suppress the message,
2854 -- since it is likely that this size error is a cascaded result of
2855 -- other errors. The reason we eliminate unfrozen types is that
2856 -- messages issued before the freeze type are for sure OK.
2859 and then Serious_Errors_Detected > 0
2860 and then Nkind (N) /= N_Component_Clause
2861 and then Nkind (Parent (N)) /= N_Component_Clause
2863 No (Get_Attribute_Definition_Clause (E, Attribute_Size))
2865 No (Get_Attribute_Definition_Clause (E, Attribute_Object_Size))
2867 No (Get_Attribute_Definition_Clause (E, Attribute_Value_Size))
2873 -- All special tests complete, so go ahead with message
2876 end Special_Msg_Delete;
2878 --------------------------
2879 -- Unwind_Internal_Type --
2880 --------------------------
2882 procedure Unwind_Internal_Type (Ent : in out Entity_Id) is
2883 Derived : Boolean := False;
2885 Old_Ent : Entity_Id;
2888 -- Undo placement of a quote, since we will put it back later
2890 Mchar := Msg_Buffer (Msglen);
2893 Msglen := Msglen - 1;
2896 -- The loop here deals with recursive types, we are trying to find a
2897 -- related entity that is not an implicit type. Note that the check with
2898 -- Old_Ent stops us from getting "stuck". Also, we don't output the
2899 -- "type derived from" message more than once in the case where we climb
2900 -- up multiple levels.
2905 -- Implicit access type, use directly designated type In Ada 2005,
2906 -- the designated type may be an anonymous access to subprogram, in
2907 -- which case we can only point to its definition.
2909 if Is_Access_Type (Ent) then
2910 if Ekind (Ent) = E_Access_Subprogram_Type
2911 or else Ekind (Ent) = E_Anonymous_Access_Subprogram_Type
2912 or else Is_Access_Protected_Subprogram_Type (Ent)
2914 Ent := Directly_Designated_Type (Ent);
2916 if not Comes_From_Source (Ent) then
2917 if Buffer_Ends_With ("type ") then
2918 Buffer_Remove ("type ");
2921 if Is_Itype (Ent) then
2923 Assoc : constant Node_Id :=
2924 Associated_Node_For_Itype (Ent);
2927 if Nkind (Assoc) in N_Subprogram_Specification then
2929 -- Anonymous access to subprogram in a signature.
2930 -- Indicate the enclosing subprogram.
2934 (Associated_Node_For_Itype (Ent));
2936 ("access to subprogram declared in profile of ");
2939 Set_Msg_Str ("access to subprogram with profile ");
2944 elsif Ekind (Ent) = E_Function then
2945 Set_Msg_Str ("access to function ");
2947 Set_Msg_Str ("access to procedure ");
2952 -- Type is access to object, named or anonymous
2955 Set_Msg_Str ("access to ");
2956 Ent := Directly_Designated_Type (Ent);
2961 elsif Is_Class_Wide_Type (Ent) then
2963 Ent := Root_Type (Ent);
2965 -- Use base type if this is a subtype
2967 elsif Ent /= Base_Type (Ent) then
2968 Buffer_Remove ("type ");
2970 -- Avoid duplication "subtype of subtype of", and also replace
2971 -- "derived from subtype of" simply by "derived from"
2973 if not Buffer_Ends_With ("subtype of ")
2974 and then not Buffer_Ends_With ("derived from ")
2976 Set_Msg_Str ("subtype of ");
2979 Ent := Base_Type (Ent);
2981 -- If this is a base type with a first named subtype, use the first
2982 -- named subtype instead. This is not quite accurate in all cases,
2983 -- but it makes too much noise to be accurate and add 'Base in all
2984 -- cases. Note that we only do this is the first named subtype is not
2985 -- itself an internal name. This avoids the obvious loop (subtype ->
2986 -- basetype -> subtype) which would otherwise occur!)
2990 FST : constant Entity_Id := First_Subtype (Ent);
2993 if not Is_Internal_Name (Chars (FST)) then
2997 -- Otherwise use root type
3001 Buffer_Remove ("type ");
3003 -- Test for "subtype of type derived from" which seems
3004 -- excessive and is replaced by "type derived from".
3006 Buffer_Remove ("subtype of");
3008 -- Avoid duplicated "type derived from type derived from"
3010 if not Buffer_Ends_With ("type derived from ") then
3011 Set_Msg_Str ("type derived from ");
3022 -- If we are stuck in a loop, get out and settle for the internal
3023 -- name after all. In this case we set to kill the message if it is
3024 -- not the first error message (we really try hard not to show the
3025 -- dirty laundry of the implementation to the poor user!)
3027 if Ent = Old_Ent then
3028 Kill_Message := True;
3032 -- Get out if we finally found a non-internal name to use
3034 exit Find when not Is_Internal_Name (Chars (Ent));
3040 end Unwind_Internal_Type;
3046 procedure VMS_Convert is
3056 P := Msg_Buffer'First;
3062 if Msg_Buffer (P) = '-' then
3063 for G in Gnames'Range loop
3064 L := Gnames (G)'Length;
3066 -- See if we have "-ggg switch", where ggg is Gnames entry
3068 if P + L + 7 <= Msglen
3069 and then Msg_Buffer (P + 1 .. P + L) = Gnames (G).all
3070 and then Msg_Buffer (P + L + 1 .. P + L + 7) = " switch"
3072 -- Replace by "/vvv qualifier", where vvv is Vnames entry
3074 N := Vnames (G)'Length;
3075 Msg_Buffer (P + N + 11 .. Msglen + N - L + 3) :=
3076 Msg_Buffer (P + L + 8 .. Msglen);
3077 Msg_Buffer (P) := '/';
3078 Msg_Buffer (P + 1 .. P + N) := Vnames (G).all;
3079 Msg_Buffer (P + N + 1 .. P + N + 10) := " qualifier";
3081 Msglen := Msglen + N - L + 3;