1 ------------------------------------------------------------------------------
3 -- GNAT COMPILER COMPONENTS --
9 -- Copyright (C) 1992-2008, 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 Sinput; use Sinput;
47 with Sinfo; use Sinfo;
48 with Snames; use Snames;
49 with Stand; use Stand;
51 with Uname; use Uname;
53 package body Errout is
55 Errors_Must_Be_Ignored : Boolean := False;
56 -- Set to True by procedure Set_Ignore_Errors (True), when calls to
57 -- error message procedures should be ignored (when parsing irrelevant
58 -- text in sources being preprocessed).
60 Finalize_Called : Boolean := False;
61 -- Set True if the Finalize routine has been called
63 Warn_On_Instance : Boolean;
64 -- Flag set true for warning message to be posted on instance
66 ------------------------------------
67 -- Table of Non-Instance Messages --
68 ------------------------------------
70 -- This table contains an entry for every error message processed by the
71 -- Error_Msg routine that is not posted on generic (or inlined) instance.
72 -- As explained in further detail in the Error_Msg procedure body, this
73 -- table is used to avoid posting redundant messages on instances.
75 type NIM_Record is record
79 -- Type used to store text and location of one message
81 package Non_Instance_Msgs is new Table.Table (
82 Table_Component_Type => NIM_Record,
83 Table_Index_Type => Int,
86 Table_Increment => 100,
87 Table_Name => "Non_Instance_Msgs");
89 -----------------------
90 -- Local Subprograms --
91 -----------------------
93 procedure Error_Msg_Internal
98 -- This is the low level routine used to post messages after dealing with
99 -- the issue of messages placed on instantiations (which get broken up
100 -- into separate calls in Error_Msg). Sptr is the location on which the
101 -- flag will be placed in the output. In the case where the flag is on
102 -- the template, this points directly to the template, not to one of the
103 -- instantiation copies of the template. Optr is the original location
104 -- used to flag the error, and this may indeed point to an instantiation
105 -- copy. So typically we can see Optr pointing to the template location
106 -- in an instantiation copy when Sptr points to the source location of
107 -- the actual instantiation (i.e the line with the new). Msg_Cont is
108 -- set true if this is a continuation message.
110 function No_Warnings (N : Node_Or_Entity_Id) return Boolean;
111 -- Determines if warnings should be suppressed for the given node
113 function OK_Node (N : Node_Id) return Boolean;
114 -- Determines if a node is an OK node to place an error message on (return
115 -- True) or if the error message should be suppressed (return False). A
116 -- message is suppressed if the node already has an error posted on it,
117 -- or if it refers to an Etype that has an error posted on it, or if
118 -- it references an Entity that has an error posted on it.
120 procedure Output_Source_Line
121 (L : Physical_Line_Number;
122 Sfile : Source_File_Index;
124 -- Outputs text of source line L, in file S, together with preceding line
125 -- number, as described above for Output_Line_Number. The Errs parameter
126 -- indicates if there are errors attached to the line, which forces
127 -- listing on, even in the presence of pragma List (Off).
129 procedure Set_Msg_Insertion_Column;
130 -- Handle column number insertion (@ insertion character)
132 procedure Set_Msg_Insertion_Node;
133 -- Handle node (name from node) insertion (& insertion character)
135 procedure Set_Msg_Insertion_Type_Reference (Flag : Source_Ptr);
136 -- Handle type reference (right brace insertion character). Flag is the
137 -- location of the flag, which is provided for the internal call to
138 -- Set_Msg_Insertion_Line_Number,
140 procedure Set_Msg_Insertion_Unit_Name (Suffix : Boolean := True);
141 -- Handle unit name insertion ($ insertion character). Depending on Boolean
142 -- parameter Suffix, (spec) or (body) is appended after the unit name.
144 procedure Set_Msg_Node (Node : Node_Id);
145 -- Add the sequence of characters for the name associated with the
146 -- given node to the current message.
148 procedure Set_Msg_Text (Text : String; Flag : Source_Ptr);
149 -- Add a sequence of characters to the current message. The characters may
150 -- be one of the special insertion characters (see documentation in spec).
151 -- Flag is the location at which the error is to be posted, which is used
152 -- to determine whether or not the # insertion needs a file name. The
153 -- variables Msg_Buffer, Msglen, Is_Style_Msg, Is_Warning_Msg, and
154 -- Is_Unconditional_Msg are set on return.
156 procedure Set_Posted (N : Node_Id);
157 -- Sets the Error_Posted flag on the given node, and all its parents
158 -- that are subexpressions and then on the parent non-subexpression
159 -- construct that contains the original expression (this reduces the
160 -- number of cascaded messages). Note that this call only has an effect
161 -- for a serious error. For a non-serious error, it has no effect.
163 procedure Set_Qualification (N : Nat; E : Entity_Id);
164 -- Outputs up to N levels of qualification for the given entity. For
165 -- example, the entity A.B.C.D will output B.C. if N = 2.
167 function Special_Msg_Delete
169 N : Node_Or_Entity_Id;
170 E : Node_Or_Entity_Id) return Boolean;
171 -- This function is called from Error_Msg_NEL, passing the message Msg,
172 -- node N on which the error is to be posted, and the entity or node E
173 -- to be used for an & insertion in the message if any. The job of this
174 -- procedure is to test for certain cascaded messages that we would like
175 -- to suppress. If the message is to be suppressed then we return True.
176 -- If the message should be generated (the normal case) False is returned.
178 procedure Unwind_Internal_Type (Ent : in out Entity_Id);
179 -- This procedure is given an entity id for an internal type, i.e.
180 -- a type with an internal name. It unwinds the type to try to get
181 -- to something reasonably printable, generating prefixes like
182 -- "subtype of", "access to", etc along the way in the buffer. The
183 -- value in Ent on return is the final name to be printed. Hopefully
184 -- this is not an internal name, but in some internal name cases, it
185 -- is an internal name, and has to be printed anyway (although in this
186 -- case the message has been killed if possible). The global variable
187 -- Class_Flag is set to True if the resulting entity should have
188 -- 'Class appended to its name (see Add_Class procedure), and is
189 -- otherwise unchanged.
191 procedure VMS_Convert;
192 -- This procedure has no effect if called when the host is not OpenVMS.
193 -- If the host is indeed OpenVMS, then the error message stored in
194 -- Msg_Buffer is scanned for appearances of switch names which need
195 -- converting to corresponding VMS qualifier names. See Gnames/Vnames
196 -- table in Errout spec for precise definition of the conversion that
197 -- is performed by this routine in OpenVMS mode.
199 -----------------------
200 -- Change_Error_Text --
201 -----------------------
203 procedure Change_Error_Text (Error_Id : Error_Msg_Id; New_Msg : String) is
204 Save_Next : Error_Msg_Id;
205 Err_Id : Error_Msg_Id := Error_Id;
208 Set_Msg_Text (New_Msg, Errors.Table (Error_Id).Sptr);
209 Errors.Table (Error_Id).Text := new String'(Msg_Buffer (1 .. Msglen));
211 -- If in immediate error message mode, output modified error message now
212 -- This is just a bit tricky, because we want to output just a single
213 -- message, and the messages we modified is already linked in. We solve
214 -- this by temporarily resetting its forward pointer to empty.
216 if Debug_Flag_OO then
217 Save_Next := Errors.Table (Error_Id).Next;
218 Errors.Table (Error_Id).Next := No_Error_Msg;
221 (Errors.Table (Error_Id).Line, Errors.Table (Error_Id).Sfile, True);
222 Output_Error_Msgs (Err_Id);
223 Errors.Table (Error_Id).Next := Save_Next;
225 end Change_Error_Text;
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
246 -- to an instantiation of this generic template, then the actual
247 -- message will be posted on the generic instantiation, along with
248 -- additional messages 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
260 -- the 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
271 -- at 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 processing of 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
288 -- of 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
291 -- on the template when we compiled the template (the template is
292 -- always compiled before any instantiations). For this purpose,
293 -- we use a separate table of messages. The reason we do this is
296 -- First, the messages can get changed by various processing
297 -- including the insertion of tokens etc, making it hard to
298 -- do the comparison.
300 -- Second, we will suppress a warning on a template if it is
301 -- not in the current extended source unit. That's reasonable
302 -- and means we don't want the warning on the instantiation
303 -- here either, but it does mean that the main error table
304 -- would not in any case include the message.
306 if Flag_Location = Orig_Loc then
307 Non_Instance_Msgs.Append ((new String'(Msg), Flag_Location));
308 Warn_On_Instance := False;
310 -- Here we have an instance message
313 -- Delete if debug flag off, and this message duplicates a
314 -- message already posted on the corresponding template
316 if not Debug_Flag_GG then
317 for J in Non_Instance_Msgs.First .. Non_Instance_Msgs.Last loop
318 if Msg = Non_Instance_Msgs.Table (J).Msg.all
319 and then Non_Instance_Msgs.Table (J).Loc = Orig_Loc
326 -- No duplicate, so error/warning will be posted on instance
328 Warn_On_Instance := Is_Warning_Msg;
331 -- Ignore warning message that is suppressed for this location. Note
332 -- that style checks are not considered warning messages for this
335 if Is_Warning_Msg and then Warnings_Suppressed (Orig_Loc) then
338 -- For style messages, check too many messages so far
341 and then Maximum_Messages /= 0
342 and then Warnings_Detected >= Maximum_Messages
347 -- The idea at this stage is that we have two kinds of messages
349 -- First, we have those messages that are to be placed as requested at
350 -- Flag_Location. This includes messages that have nothing to do with
351 -- generics, and also messages placed on generic templates that reflect
352 -- an error in the template itself. For such messages we simply call
353 -- Error_Msg_Internal to place the message in the requested location.
355 if Instantiation (Sindex) = No_Location then
356 Error_Msg_Internal (Msg, Flag_Location, Flag_Location, False);
360 -- If we are trying to flag an error in an instantiation, we may have
361 -- a generic contract violation. What we generate in this case is:
363 -- instantiation error at ...
364 -- original error message
368 -- warning: in instantiation at
369 -- warning: original warning message
371 -- All these messages are posted at the location of the top level
372 -- instantiation. If there are nested instantiations, then the
373 -- instantiation error message can be repeated, pointing to each
374 -- of the relevant instantiations.
376 -- Note: the instantiation mechanism is also shared for inlining
377 -- of subprogram bodies when front end inlining is done. In this
378 -- case the messages have the form:
380 -- in inlined body at ...
381 -- original error message
385 -- warning: in inlined body at
386 -- warning: original warning message
388 -- OK, this is the case where we have an instantiation error, and
389 -- we need to generate the error on the instantiation, rather than
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
400 -- use Error_Msg_Sloc for the location of the instantiation error
401 -- but we 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
421 -- point in any case, we do not want the references to the
422 -- bad lines in the instance to be annotated with the location
423 -- of the instantiation.
425 Suppress_Instance_Location := True;
426 Msg_Cont_Status := False;
428 -- Loop to generate instantiation messages
430 Error_Msg_Sloc := Flag_Location;
431 X := Get_Source_File_Index (Flag_Location);
433 while Instantiation (X) /= No_Location loop
435 -- Suppress instantiation message on continuation lines
437 if Msg (Msg'First) /= '\' then
439 -- Case of inlined body
441 if Inlined_Body (X) then
442 if Is_Warning_Msg then
444 ("?in inlined body #",
445 Actual_Error_Loc, Flag_Location, Msg_Cont_Status);
449 ("error in inlined body #",
450 Actual_Error_Loc, Flag_Location, Msg_Cont_Status);
453 -- Case of generic instantiation
456 if Is_Warning_Msg then
458 ("?in instantiation #",
459 Actual_Error_Loc, Flag_Location, Msg_Cont_Status);
463 ("instantiation error #",
464 Actual_Error_Loc, Flag_Location, Msg_Cont_Status);
469 Error_Msg_Sloc := Instantiation (X);
470 X := Get_Source_File_Index (Error_Msg_Sloc);
471 Msg_Cont_Status := True;
474 Suppress_Instance_Location := False;
475 Error_Msg_Sloc := Save_Error_Msg_Sloc;
477 -- Here we output the original message on the outer instantiation
480 (Msg, Actual_Error_Loc, Flag_Location, Msg_Cont_Status);
488 procedure Error_Msg_AP (Msg : String) is
493 -- If we had saved the Scan_Ptr value after scanning the previous
494 -- token, then we would have exactly the right place for putting
495 -- the flag immediately at hand. However, that would add at least
496 -- two instructions to a Scan call *just* to service the possibility
497 -- of an Error_Msg_AP call. So instead we reconstruct that value.
499 -- We have two possibilities, start with Prev_Token_Ptr and skip over
500 -- the current token, which is made harder by the possibility that this
501 -- token may be in error, or start with Token_Ptr and work backwards.
502 -- We used to take the second approach, but it's hard because of
503 -- comments, and harder still because things that look like comments
504 -- can appear inside strings. So now we take the first approach.
506 -- Note: in the case where there is no previous token, Prev_Token_Ptr
507 -- is set to Source_First, which is a reasonable position for the
508 -- error flag in this situation.
510 S1 := Prev_Token_Ptr;
513 -- If the previous token is a string literal, we need a special approach
514 -- since there may be white space inside the literal and we don't want
515 -- to stop on that white space.
517 -- Note: since this is an error recovery issue anyway, it is not worth
518 -- worrying about special UTF_32 line terminator characters here.
520 if Prev_Token = Tok_String_Literal then
524 if Source (S1) = C then
526 exit when Source (S1) /= C;
527 elsif Source (S1) in Line_Terminator then
532 -- Character literal also needs special handling
534 elsif Prev_Token = Tok_Char_Literal then
537 -- Otherwise we search forward for the end of the current token, marked
538 -- by a line terminator, white space, a comment symbol or if we bump
539 -- into the following token (i.e. the current token).
541 -- Again, it is not worth worrying about UTF_32 special line terminator
542 -- characters in this context, since this is only for error recovery.
545 while Source (S1) not in Line_Terminator
546 and then Source (S1) /= ' '
547 and then Source (S1) /= ASCII.HT
548 and then (Source (S1) /= '-' or else Source (S1 + 1) /= '-')
549 and then S1 /= Token_Ptr
555 -- S1 is now set to the location for the flag
564 procedure Error_Msg_BC (Msg : String) is
566 -- If we are at end of file, post the flag after the previous token
568 if Token = Tok_EOF then
571 -- If we are at start of file, post the flag at the current token
573 elsif Token_Ptr = Source_First (Current_Source_File) then
576 -- If the character before the current token is a space or a horizontal
577 -- tab, then we place the flag on this character (in the case of a tab
578 -- we would really like to place it in the "last" character of the tab
579 -- space, but that it too much trouble to worry about).
581 elsif Source (Token_Ptr - 1) = ' '
582 or else Source (Token_Ptr - 1) = ASCII.HT
584 Error_Msg (Msg, Token_Ptr - 1);
586 -- If there is no space or tab before the current token, then there is
587 -- no room to place the flag before the token, so we place it on the
588 -- token instead (this happens for example at the start of a line).
591 Error_Msg (Msg, Token_Ptr);
599 procedure Error_Msg_CRT (Feature : String; N : Node_Id) is
600 CNRT : constant String := " not allowed in no run time mode";
601 CCRT : constant String := " not supported by configuration>";
603 S : String (1 .. Feature'Length + 1 + CCRT'Length);
608 S (2 .. Feature'Length + 1) := Feature;
609 L := Feature'Length + 2;
611 if No_Run_Time_Mode then
612 S (L .. L + CNRT'Length - 1) := CNRT;
613 L := L + CNRT'Length - 1;
615 else pragma Assert (Configurable_Run_Time_Mode);
616 S (L .. L + CCRT'Length - 1) := CCRT;
617 L := L + CCRT'Length - 1;
620 Error_Msg_N (S (1 .. L), N);
621 Configurable_Run_Time_Violations := Configurable_Run_Time_Violations + 1;
628 procedure Error_Msg_F (Msg : String; N : Node_Id) is
630 Error_Msg_NEL (Msg, N, N, Sloc (First_Node (N)));
637 procedure Error_Msg_FE
640 E : Node_Or_Entity_Id)
643 Error_Msg_NEL (Msg, N, E, Sloc (First_Node (N)));
646 ------------------------
647 -- Error_Msg_Internal --
648 ------------------------
650 procedure Error_Msg_Internal
656 Next_Msg : Error_Msg_Id;
657 -- Pointer to next message at insertion point
659 Prev_Msg : Error_Msg_Id;
660 -- Pointer to previous message at insertion point
662 Temp_Msg : Error_Msg_Id;
664 procedure Handle_Serious_Error;
665 -- Internal procedure to do all error message handling for a serious
666 -- error message, other than bumping the error counts and arranging
667 -- for the message to be output.
669 --------------------------
670 -- Handle_Serious_Error --
671 --------------------------
673 procedure Handle_Serious_Error is
675 -- Turn off code generation if not done already
677 if Operating_Mode = Generate_Code then
678 Operating_Mode := Check_Semantics;
679 Expander_Active := False;
682 -- Set the fatal error flag in the unit table unless we are
683 -- in Try_Semantics mode. This stops the semantics from being
684 -- performed if we find a serious error. This is skipped if we
685 -- are currently dealing with the configuration pragma file.
688 and then Current_Source_Unit /= No_Unit
690 Set_Fatal_Error (Get_Source_Unit (Sptr));
692 end Handle_Serious_Error;
694 -- Start of processing for Error_Msg_Internal
697 if Raise_Exception_On_Error /= 0 then
698 raise Error_Msg_Exception;
701 Continuation := Msg_Cont;
702 Continuation_New_Line := False;
703 Suppress_Message := False;
704 Kill_Message := False;
705 Set_Msg_Text (Msg, Sptr);
707 -- Kill continuation if parent message killed
709 if Continuation and Last_Killed then
713 -- Return without doing anything if message is suppressed
716 and not All_Errors_Mode
717 and not (Msg (Msg'Last) = '!')
718 and not Is_Warning_Msg
720 if not Continuation then
727 -- Return without doing anything if message is killed and this
728 -- is not the first error message. The philosophy is that if we
729 -- get a weird error message and we already have had a message,
730 -- then we hope the weird message is a junk cascaded message
733 and then not All_Errors_Mode
734 and then Total_Errors_Detected /= 0
736 if not Continuation then
743 -- Special check for warning message to see if it should be output
745 if Is_Warning_Msg then
747 -- Immediate return if warning message and warnings are suppressed
749 if Warnings_Suppressed (Optr)
750 or else Warnings_Suppressed (Sptr)
752 Cur_Msg := No_Error_Msg;
756 -- If the flag location is in the main extended source unit
757 -- then for sure we want the warning since it definitely belongs
759 if In_Extended_Main_Source_Unit (Sptr) then
762 -- If the flag location is not in the main extended source unit,
763 -- then we want to eliminate the warning, unless it is in the
764 -- extended main code unit and we want warnings on the instance.
766 elsif In_Extended_Main_Code_Unit (Sptr)
767 and then Warn_On_Instance
771 -- Keep warning if debug flag G set
773 elsif Debug_Flag_GG then
776 -- Keep warning if message text ends in !!
778 elsif Msg (Msg'Last) = '!' and then Msg (Msg'Last - 1) = '!' then
781 -- Here is where we delete a warning from a with'ed unit
784 Cur_Msg := No_Error_Msg;
786 if not Continuation then
794 -- If message is to be ignored in special ignore message mode, this is
795 -- where we do this special processing, bypassing message output.
797 if Ignore_Errors_Enable > 0 then
798 if Is_Serious_Error then
799 Handle_Serious_Error;
805 -- If error message line length set, and this is a continuation message
806 -- then all we do is to append the text to the text of the last message
807 -- with a comma space separator (eliminating a possible (style) or
810 if Error_Msg_Line_Length /= 0
811 and then Continuation
813 Cur_Msg := Errors.Last;
816 Oldm : String_Ptr := Errors.Table (Cur_Msg).Text;
817 Newm : String (1 .. Oldm'Last + 2 + Msglen);
822 -- First copy old message to new one and free it
824 Newm (Oldm'Range) := Oldm.all;
828 -- Remove (style) or info: at start of message
830 if Msglen > 8 and then Msg_Buffer (1 .. 8) = "(style) " then
832 elsif Msglen > 6 and then Msg_Buffer (1 .. 6) = "info: " then
838 -- Now deal with separation between messages. Normally this
839 -- is simply comma space, but there are some special cases.
841 -- If continuation new line, then put actual NL character in msg
843 if Continuation_New_Line then
845 Newm (Newl) := ASCII.LF;
847 -- If continuation message is enclosed in parentheses, then
848 -- special treatment (don't need a comma, and we want to combine
849 -- successive parenthetical remarks into a single one with
850 -- separating commas).
852 elsif Msg_Buffer (M) = '(' and then Msg_Buffer (Msglen) = ')' then
854 -- Case where existing message ends in right paren, remove
855 -- and separate parenthetical remarks with a comma.
857 if Newm (Newl) = ')' then
859 Msg_Buffer (M) := ' ';
861 -- Case where we are adding new parenthetical comment
868 -- Case where continuation not in parens and no new line
871 Newm (Newl + 1 .. Newl + 2) := ", ";
875 -- Append new message
877 Newm (Newl + 1 .. Newl + Msglen - M + 1) :=
878 Msg_Buffer (M .. Msglen);
879 Newl := Newl + Msglen - M + 1;
880 Errors.Table (Cur_Msg).Text := new String'(Newm (1 .. Newl));
886 -- Otherwise build error message object for new message
888 Errors.Increment_Last;
889 Cur_Msg := Errors.Last;
890 Errors.Table (Cur_Msg).Text := new String'(Msg_Buffer (1 .. Msglen));
891 Errors.Table (Cur_Msg).Next := No_Error_Msg;
892 Errors.Table (Cur_Msg).Sptr := Sptr;
893 Errors.Table (Cur_Msg).Optr := Optr;
894 Errors.Table (Cur_Msg).Sfile := Get_Source_File_Index (Sptr);
895 Errors.Table (Cur_Msg).Line := Get_Physical_Line_Number (Sptr);
896 Errors.Table (Cur_Msg).Col := Get_Column_Number (Sptr);
897 Errors.Table (Cur_Msg).Warn := Is_Warning_Msg;
898 Errors.Table (Cur_Msg).Style := Is_Style_Msg;
899 Errors.Table (Cur_Msg).Serious := Is_Serious_Error;
900 Errors.Table (Cur_Msg).Uncond := Is_Unconditional_Msg;
901 Errors.Table (Cur_Msg).Msg_Cont := Continuation;
902 Errors.Table (Cur_Msg).Deleted := False;
904 -- If immediate errors mode set, output error message now. Also output
905 -- now if the -d1 debug flag is set (so node number message comes out
906 -- just before actual error message)
908 if Debug_Flag_OO or else Debug_Flag_1 then
911 (Errors.Table (Cur_Msg).Line, Errors.Table (Cur_Msg).Sfile, True);
913 Output_Error_Msgs (Temp_Msg);
915 -- If not in immediate errors mode, then we insert the message in the
916 -- error chain for later output by Finalize. The messages are sorted
917 -- first by unit (main unit comes first), and within a unit by source
918 -- location (earlier flag location first in the chain).
921 -- First a quick check, does this belong at the very end of the chain
922 -- of error messages. This saves a lot of time in the normal case if
923 -- there are lots of messages.
925 if Last_Error_Msg /= No_Error_Msg
926 and then Errors.Table (Cur_Msg).Sfile =
927 Errors.Table (Last_Error_Msg).Sfile
928 and then (Sptr > Errors.Table (Last_Error_Msg).Sptr
930 (Sptr = Errors.Table (Last_Error_Msg).Sptr
932 Optr > Errors.Table (Last_Error_Msg).Optr))
934 Prev_Msg := Last_Error_Msg;
935 Next_Msg := No_Error_Msg;
937 -- Otherwise do a full sequential search for the insertion point
940 Prev_Msg := No_Error_Msg;
941 Next_Msg := First_Error_Msg;
942 while Next_Msg /= No_Error_Msg loop
944 Errors.Table (Cur_Msg).Sfile < Errors.Table (Next_Msg).Sfile;
946 if Errors.Table (Cur_Msg).Sfile =
947 Errors.Table (Next_Msg).Sfile
949 exit when Sptr < Errors.Table (Next_Msg).Sptr
951 (Sptr = Errors.Table (Next_Msg).Sptr
953 Optr < Errors.Table (Next_Msg).Optr);
956 Prev_Msg := Next_Msg;
957 Next_Msg := Errors.Table (Next_Msg).Next;
961 -- Now we insert the new message in the error chain. The insertion
962 -- point for the message is after Prev_Msg and before Next_Msg.
964 -- The possible insertion point for the new message is after Prev_Msg
965 -- and before Next_Msg. However, this is where we do a special check
966 -- for redundant parsing messages, defined as messages posted on the
967 -- same line. The idea here is that probably such messages are junk
968 -- from the parser recovering. In full errors mode, we don't do this
969 -- deletion, but otherwise such messages are discarded at this stage.
971 if Prev_Msg /= No_Error_Msg
972 and then Errors.Table (Prev_Msg).Line =
973 Errors.Table (Cur_Msg).Line
974 and then Errors.Table (Prev_Msg).Sfile =
975 Errors.Table (Cur_Msg).Sfile
976 and then Compiler_State = Parsing
977 and then not All_Errors_Mode
979 -- Don't delete unconditional messages and at this stage, don't
980 -- delete continuation lines (we attempted to delete those earlier
981 -- if the parent message was deleted.
983 if not Errors.Table (Cur_Msg).Uncond
984 and then not Continuation
986 -- Don't delete if prev msg is warning and new msg is an error.
987 -- This is because we don't want a real error masked by a
988 -- warning. In all other cases (that is parse errors for the
989 -- same line that are not unconditional) we do delete the
990 -- message. This helps to avoid junk extra messages from
991 -- cascaded parsing errors
993 if not (Errors.Table (Prev_Msg).Warn
995 Errors.Table (Prev_Msg).Style)
997 (Errors.Table (Cur_Msg).Warn
999 Errors.Table (Cur_Msg).Style)
1001 -- All tests passed, delete the message by simply returning
1002 -- without any further processing.
1004 if not Continuation then
1005 Last_Killed := True;
1013 -- Come here if message is to be inserted in the error chain
1015 if not Continuation then
1016 Last_Killed := False;
1019 if Prev_Msg = No_Error_Msg then
1020 First_Error_Msg := Cur_Msg;
1022 Errors.Table (Prev_Msg).Next := Cur_Msg;
1025 Errors.Table (Cur_Msg).Next := Next_Msg;
1027 if Next_Msg = No_Error_Msg then
1028 Last_Error_Msg := Cur_Msg;
1032 -- Bump appropriate statistics count
1034 if Errors.Table (Cur_Msg).Warn or Errors.Table (Cur_Msg).Style then
1035 Warnings_Detected := Warnings_Detected + 1;
1038 Total_Errors_Detected := Total_Errors_Detected + 1;
1040 if Errors.Table (Cur_Msg).Serious then
1041 Serious_Errors_Detected := Serious_Errors_Detected + 1;
1042 Handle_Serious_Error;
1046 -- If too many warnings turn off warnings
1048 if Maximum_Messages /= 0 then
1049 if Warnings_Detected = Maximum_Messages then
1050 Warning_Mode := Suppress;
1053 -- If too many errors abandon compilation
1055 if Total_Errors_Detected = Maximum_Messages then
1056 raise Unrecoverable_Error;
1059 end Error_Msg_Internal;
1065 procedure Error_Msg_N (Msg : String; N : Node_Or_Entity_Id) is
1067 Error_Msg_NEL (Msg, N, N, Sloc (N));
1074 procedure Error_Msg_NE
1076 N : Node_Or_Entity_Id;
1077 E : Node_Or_Entity_Id)
1080 Error_Msg_NEL (Msg, N, E, Sloc (N));
1087 procedure Error_Msg_NEL
1089 N : Node_Or_Entity_Id;
1090 E : Node_Or_Entity_Id;
1091 Flag_Location : Source_Ptr)
1094 if Special_Msg_Delete (Msg, N, E) then
1098 Test_Style_Warning_Serious_Msg (Msg);
1100 -- Special handling for warning messages
1102 if Is_Warning_Msg then
1104 -- Suppress if no warnings set for either entity or node
1106 if No_Warnings (N) or else No_Warnings (E) then
1110 -- Suppress if inside loop that is known to be null or is probably
1111 -- null (case where loop executes only if invalid values present).
1112 -- In either case warnings in the loop are likely to be junk.
1119 while Present (P) loop
1120 if Nkind (P) = N_Loop_Statement
1121 and then Suppress_Loop_Warnings (P)
1131 -- Test for message to be output
1134 or else Msg (Msg'Last) = '!'
1135 or else Is_Warning_Msg
1137 or else (Msg (Msg'First) = '\' and not Last_Killed)
1140 Error_Msg_Node_1 := E;
1141 Error_Msg (Msg, Flag_Location);
1144 Last_Killed := True;
1147 if not (Is_Warning_Msg or Is_Style_Msg) then
1156 procedure Error_Msg_NW
1159 N : Node_Or_Entity_Id)
1163 and then In_Extended_Main_Source_Unit (N)
1164 and then Comes_From_Source (N)
1166 Error_Msg_NEL (Msg, N, N, Sloc (N));
1174 procedure Error_Msg_S (Msg : String) is
1176 Error_Msg (Msg, Scan_Ptr);
1183 procedure Error_Msg_SC (Msg : String) is
1185 -- If we are at end of file, post the flag after the previous token
1187 if Token = Tok_EOF then
1190 -- For all other cases the message is posted at the current token
1194 Error_Msg (Msg, Token_Ptr);
1202 procedure Error_Msg_SP (Msg : String) is
1204 -- Note: in the case where there is no previous token, Prev_Token_Ptr
1205 -- is set to Source_First, which is a reasonable position for the
1206 -- error flag in this situation
1208 Error_Msg (Msg, Prev_Token_Ptr);
1215 procedure Finalize (Last_Call : Boolean) is
1221 -- Eliminate any duplicated error messages from the list. This is
1222 -- done after the fact to avoid problems with Change_Error_Text.
1224 Cur := First_Error_Msg;
1225 while Cur /= No_Error_Msg loop
1226 Nxt := Errors.Table (Cur).Next;
1229 while F /= No_Error_Msg
1230 and then Errors.Table (F).Sptr = Errors.Table (Cur).Sptr
1232 Check_Duplicate_Message (Cur, F);
1233 F := Errors.Table (F).Next;
1239 -- Mark any messages suppressed by specific warnings as Deleted
1241 Cur := First_Error_Msg;
1242 while Cur /= No_Error_Msg loop
1243 if not Errors.Table (Cur).Deleted
1244 and then Warning_Specifically_Suppressed
1245 (Errors.Table (Cur).Sptr,
1246 Errors.Table (Cur).Text)
1248 Errors.Table (Cur).Deleted := True;
1249 Warnings_Detected := Warnings_Detected - 1;
1252 Cur := Errors.Table (Cur).Next;
1255 Finalize_Called := True;
1257 -- Check consistency of specific warnings (may add warnings). We only
1258 -- do this on the last call, after all possible warnings are posted.
1261 Validate_Specific_Warnings (Error_Msg'Access);
1269 function First_Node (C : Node_Id) return Node_Id is
1270 L : constant Source_Ptr := Sloc (Original_Node (C));
1271 Sfile : constant Source_File_Index := Get_Source_File_Index (L);
1275 function Test_Earlier (N : Node_Id) return Traverse_Result;
1276 -- Function applied to every node in the construct
1278 procedure Search_Tree_First is new Traverse_Proc (Test_Earlier);
1279 -- Create traversal procedure
1285 function Test_Earlier (N : Node_Id) return Traverse_Result is
1286 Loc : constant Source_Ptr := Sloc (Original_Node (N));
1289 -- Check for earlier. The tests for being in the same file ensures
1290 -- against strange cases of foreign code somehow being present. We
1291 -- don't want wild placement of messages if that happens, so it is
1292 -- best to just ignore this situation.
1295 and then Get_Source_File_Index (Loc) = Sfile
1297 Earliest := Original_Node (N);
1304 -- Start of processing for First_Node
1307 Earliest := Original_Node (C);
1308 Eloc := Sloc (Earliest);
1309 Search_Tree_First (Original_Node (C));
1317 function First_Sloc (N : Node_Id) return Source_Ptr is
1318 SI : constant Source_File_Index := Source_Index (Get_Source_Unit (N));
1319 SF : constant Source_Ptr := Source_First (SI);
1324 F := First_Node (N);
1327 -- The following circuit is a bit subtle. When we have parenthesized
1328 -- expressions, then the Sloc will not record the location of the
1329 -- paren, but we would like to post the flag on the paren. So what
1330 -- we do is to crawl up the tree from the First_Node, adjusting the
1331 -- Sloc value for any parentheses we know are present. Yes, we know
1332 -- this circuit is not 100% reliable (e.g. because we don't record
1333 -- all possible paren level values), but this is only for an error
1334 -- message so it is good enough.
1337 Paren_Loop : for J in 1 .. Paren_Count (F) loop
1339 -- We don't look more than 12 characters behind the current
1340 -- location, and in any case not past the front of the source.
1342 Search_Loop : for K in 1 .. 12 loop
1343 exit Search_Loop when S = SF;
1345 if Source_Text (SI) (S - 1) = '(' then
1349 elsif Source_Text (SI) (S - 1) <= ' ' then
1355 end loop Search_Loop;
1356 end loop Paren_Loop;
1358 exit Node_Loop when F = N;
1360 exit Node_Loop when Nkind (F) not in N_Subexpr;
1370 procedure Initialize is
1373 First_Error_Msg := No_Error_Msg;
1374 Last_Error_Msg := No_Error_Msg;
1375 Serious_Errors_Detected := 0;
1376 Total_Errors_Detected := 0;
1377 Warnings_Detected := 0;
1378 Cur_Msg := No_Error_Msg;
1381 -- Initialize warnings table, if all warnings are suppressed, supply
1382 -- an initial dummy entry covering all possible source locations.
1385 Specific_Warnings.Init;
1387 if Warning_Mode = Suppress then
1388 Warnings.Increment_Last;
1389 Warnings.Table (Warnings.Last).Start := Source_Ptr'First;
1390 Warnings.Table (Warnings.Last).Stop := Source_Ptr'Last;
1398 function No_Warnings (N : Node_Or_Entity_Id) return Boolean is
1400 if Error_Posted (N) then
1403 elsif Nkind (N) in N_Entity and then Has_Warnings_Off (N) then
1406 elsif Is_Entity_Name (N)
1407 and then Present (Entity (N))
1408 and then Has_Warnings_Off (Entity (N))
1421 function OK_Node (N : Node_Id) return Boolean is
1422 K : constant Node_Kind := Nkind (N);
1425 if Error_Posted (N) then
1428 elsif K in N_Has_Etype
1429 and then Present (Etype (N))
1430 and then Error_Posted (Etype (N))
1435 or else K = N_Attribute_Reference
1436 or else K = N_Character_Literal
1437 or else K = N_Expanded_Name
1438 or else K = N_Identifier
1439 or else K = N_Operator_Symbol)
1440 and then Present (Entity (N))
1441 and then Error_Posted (Entity (N))
1449 ---------------------
1450 -- Output_Messages --
1451 ---------------------
1453 procedure Output_Messages is
1457 procedure Write_Error_Summary;
1458 -- Write error summary
1460 procedure Write_Header (Sfile : Source_File_Index);
1461 -- Write header line (compiling or checking given file)
1463 procedure Write_Max_Errors;
1464 -- Write message if max errors reached
1466 -------------------------
1467 -- Write_Error_Summary --
1468 -------------------------
1470 procedure Write_Error_Summary is
1472 -- Extra blank line if error messages or source listing were output
1474 if Total_Errors_Detected + Warnings_Detected > 0
1480 -- Message giving number of lines read and number of errors detected.
1481 -- This normally goes to Standard_Output. The exception is when brief
1482 -- mode is not set, verbose mode (or full list mode) is set, and
1483 -- there are errors. In this case we send the message to standard
1484 -- error to make sure that *something* appears on standard error in
1485 -- an error situation.
1487 -- Formerly, only the "# errors" suffix was sent to stderr, whereas
1488 -- "# lines:" appeared on stdout. This caused problems on VMS when
1489 -- the stdout buffer was flushed, giving an extra line feed after
1492 if Total_Errors_Detected + Warnings_Detected /= 0
1493 and then not Brief_Output
1494 and then (Verbose_Mode or Full_List)
1499 -- Message giving total number of lines
1502 Write_Int (Num_Source_Lines (Main_Source_File));
1504 if Num_Source_Lines (Main_Source_File) = 1 then
1505 Write_Str (" line: ");
1507 Write_Str (" lines: ");
1510 if Total_Errors_Detected = 0 then
1511 Write_Str ("No errors");
1513 elsif Total_Errors_Detected = 1 then
1514 Write_Str ("1 error");
1517 Write_Int (Total_Errors_Detected);
1518 Write_Str (" errors");
1521 if Warnings_Detected /= 0 then
1523 Write_Int (Warnings_Detected);
1524 Write_Str (" warning");
1526 if Warnings_Detected /= 1 then
1530 if Warning_Mode = Treat_As_Error then
1531 Write_Str (" (treated as error");
1533 if Warnings_Detected /= 1 then
1542 Set_Standard_Output;
1543 end Write_Error_Summary;
1549 procedure Write_Header (Sfile : Source_File_Index) is
1551 if Verbose_Mode or Full_List then
1552 if Original_Operating_Mode = Generate_Code then
1553 Write_Str ("Compiling: ");
1555 Write_Str ("Checking: ");
1558 Write_Name (Full_File_Name (Sfile));
1560 if not Debug_Flag_7 then
1561 Write_Str (" (source file time stamp: ");
1562 Write_Time_Stamp (Sfile);
1570 ----------------------
1571 -- Write_Max_Errors --
1572 ----------------------
1574 procedure Write_Max_Errors is
1576 if Maximum_Messages /= 0 then
1577 if Warnings_Detected >= Maximum_Messages then
1579 Write_Line ("maximum number of warnings output");
1580 Write_Line ("any further warnings suppressed");
1581 Set_Standard_Output;
1584 -- If too many errors print message
1586 if Total_Errors_Detected >= Maximum_Messages then
1588 Write_Line ("fatal error: maximum number of errors detected");
1589 Set_Standard_Output;
1592 end Write_Max_Errors;
1594 -- Start of processing for Output_Messages
1597 -- Error if Finalize has not been called
1599 if not Finalize_Called then
1600 raise Program_Error;
1603 -- Reset current error source file if the main unit has a pragma
1604 -- Source_Reference. This ensures outputting the proper name of
1605 -- the source file in this situation.
1607 if Main_Source_File = No_Source_File
1608 or else Num_SRef_Pragmas (Main_Source_File) /= 0
1610 Current_Error_Source_File := No_Source_File;
1615 if Brief_Output or (not Full_List and not Verbose_Mode) then
1618 E := First_Error_Msg;
1619 while E /= No_Error_Msg loop
1620 if not Errors.Table (E).Deleted and then not Debug_Flag_KK then
1621 if Full_Path_Name_For_Brief_Errors then
1622 Write_Name (Full_Ref_Name (Errors.Table (E).Sfile));
1624 Write_Name (Reference_Name (Errors.Table (E).Sfile));
1628 Write_Int (Int (Physical_To_Logical
1629 (Errors.Table (E).Line,
1630 Errors.Table (E).Sfile)));
1633 if Errors.Table (E).Col < 10 then
1637 Write_Int (Int (Errors.Table (E).Col));
1639 Output_Msg_Text (E);
1643 E := Errors.Table (E).Next;
1646 Set_Standard_Output;
1649 -- Full source listing case
1652 List_Pragmas_Index := 1;
1653 List_Pragmas_Mode := True;
1654 E := First_Error_Msg;
1656 -- Normal case, to stdout (copyright notice already output)
1658 if Full_List_File_Name = null then
1659 if not Debug_Flag_7 then
1666 Create_List_File_Access.all (Full_List_File_Name.all);
1667 Set_Special_Output (Write_List_Info_Access.all'Access);
1669 -- Write copyright notice to file
1671 if not Debug_Flag_7 then
1672 Write_Str ("GNAT ");
1673 Write_Str (Gnat_Version_String);
1675 Write_Str ("Copyright 1992-" &
1677 ", Free Software Foundation, Inc.");
1682 -- First list extended main source file units with errors
1684 -- Note: if debug flag d.m is set, only the main source is listed
1686 for U in Main_Unit .. Last_Unit loop
1687 if In_Extended_Main_Source_Unit (Cunit_Entity (U))
1688 and then (U = Main_Unit or else not Debug_Flag_Dot_M)
1691 Sfile : constant Source_File_Index := Source_Index (U);
1695 Write_Header (Sfile);
1698 -- Normally, we don't want an "error messages from file"
1699 -- message when listing the entire file, so we set the
1700 -- current source file as the current error source file.
1701 -- However, the old style of doing things was to list this
1702 -- message if pragma Source_Reference is present, even for
1703 -- the main unit. Since the purpose of the -gnatd.m switch
1704 -- is to duplicate the old behavior, we skip the reset if
1705 -- this debug flag is set.
1707 if not Debug_Flag_Dot_M then
1708 Current_Error_Source_File := Sfile;
1711 for N in 1 .. Last_Source_Line (Sfile) loop
1712 while E /= No_Error_Msg
1713 and then Errors.Table (E).Deleted
1715 E := Errors.Table (E).Next;
1720 and then Errors.Table (E).Line = N
1721 and then Errors.Table (E).Sfile = Sfile;
1723 Output_Source_Line (N, Sfile, Err_Flag);
1726 Output_Error_Msgs (E);
1728 if not Debug_Flag_2 then
1737 -- Then output errors, if any, for subsidiary units not in the
1738 -- main extended unit.
1740 -- Note: if debug flag d.m set, include errors for any units other
1741 -- than the main unit in the extended source unit (e.g. spec and
1742 -- subunits for a body).
1744 while E /= No_Error_Msg
1745 and then (not In_Extended_Main_Source_Unit (Errors.Table (E).Sptr)
1748 and then Get_Source_Unit
1749 (Errors.Table (E).Sptr) /= Main_Unit))
1751 if Errors.Table (E).Deleted then
1752 E := Errors.Table (E).Next;
1757 (Errors.Table (E).Line, Errors.Table (E).Sfile, True);
1758 Output_Error_Msgs (E);
1762 -- If output to file, write extra copy of error summary to the
1763 -- output file, and then close it.
1765 if Full_List_File_Name /= null then
1766 Write_Error_Summary;
1768 Close_List_File_Access.all;
1769 Cancel_Special_Output;
1773 -- Verbose mode (error lines only with error flags). Normally this is
1774 -- ignored in full list mode, unless we are listing to a file, in which
1775 -- case we still generate -gnatv output to standard output.
1778 and then (not Full_List or else Full_List_File_Name /= null)
1781 Write_Header (Main_Source_File);
1782 E := First_Error_Msg;
1784 -- Loop through error lines
1786 while E /= No_Error_Msg loop
1787 if Errors.Table (E).Deleted then
1788 E := Errors.Table (E).Next;
1792 (Errors.Table (E).Line, Errors.Table (E).Sfile, True);
1793 Output_Error_Msgs (E);
1798 -- Output error summary if verbose or full list mode
1800 if Verbose_Mode or else Full_List then
1801 Write_Error_Summary;
1806 if Warning_Mode = Treat_As_Error then
1807 Total_Errors_Detected := Total_Errors_Detected + Warnings_Detected;
1808 Warnings_Detected := 0;
1810 end Output_Messages;
1812 ------------------------
1813 -- Output_Source_Line --
1814 ------------------------
1816 procedure Output_Source_Line
1817 (L : Physical_Line_Number;
1818 Sfile : Source_File_Index;
1824 Line_Number_Output : Boolean := False;
1825 -- Set True once line number is output
1827 Empty_Line : Boolean := True;
1828 -- Set False if line includes at least one character
1831 if Sfile /= Current_Error_Source_File then
1832 Write_Str ("==============Error messages for ");
1834 case Sinput.File_Type (Sfile) is
1836 Write_Str ("source");
1838 when Sinput.Config =>
1839 Write_Str ("configuration pragmas");
1842 Write_Str ("symbol definition");
1844 when Sinput.Preproc =>
1845 Write_Str ("preprocessing data");
1848 Write_Str (" file: ");
1849 Write_Name (Full_File_Name (Sfile));
1852 if Num_SRef_Pragmas (Sfile) > 0 then
1853 Write_Str ("--------------Line numbers from file: ");
1854 Write_Name (Full_Ref_Name (Sfile));
1855 Write_Str (" (starting at line ");
1856 Write_Int (Int (First_Mapped_Line (Sfile)));
1861 Current_Error_Source_File := Sfile;
1864 if Errs or List_Pragmas_Mode then
1865 Output_Line_Number (Physical_To_Logical (L, Sfile));
1866 Line_Number_Output := True;
1869 S := Line_Start (L, Sfile);
1872 C := Source_Text (Sfile) (S);
1873 exit when C = ASCII.LF or else C = ASCII.CR or else C = EOF;
1875 -- Deal with matching entry in List_Pragmas table
1878 and then List_Pragmas_Index <= List_Pragmas.Last
1879 and then S = List_Pragmas.Table (List_Pragmas_Index).Ploc
1881 case List_Pragmas.Table (List_Pragmas_Index).Ptyp is
1885 -- Ignore if on line with errors so that error flags
1886 -- get properly listed with the error line .
1889 Write_Char (ASCII.FF);
1893 List_Pragmas_Mode := True;
1895 if not Line_Number_Output then
1896 Output_Line_Number (Physical_To_Logical (L, Sfile));
1897 Line_Number_Output := True;
1904 List_Pragmas_Mode := False;
1907 List_Pragmas_Index := List_Pragmas_Index + 1;
1909 -- Normal case (no matching entry in List_Pragmas table)
1912 if Errs or List_Pragmas_Mode then
1917 Empty_Line := False;
1921 -- If we have output a source line, then add the line terminator, with
1922 -- training spaces preserved (so we output the line exactly as input).
1924 if Line_Number_Output then
1928 Write_Eol_Keep_Blanks;
1931 end Output_Source_Line;
1933 -----------------------------
1934 -- Remove_Warning_Messages --
1935 -----------------------------
1937 procedure Remove_Warning_Messages (N : Node_Id) is
1939 function Check_For_Warning (N : Node_Id) return Traverse_Result;
1940 -- This function checks one node for a possible warning message
1942 function Check_All_Warnings is new Traverse_Func (Check_For_Warning);
1943 -- This defines the traversal operation
1945 -----------------------
1946 -- Check_For_Warning --
1947 -----------------------
1949 function Check_For_Warning (N : Node_Id) return Traverse_Result is
1950 Loc : constant Source_Ptr := Sloc (N);
1953 function To_Be_Removed (E : Error_Msg_Id) return Boolean;
1954 -- Returns True for a message that is to be removed. Also adjusts
1955 -- warning count appropriately.
1961 function To_Be_Removed (E : Error_Msg_Id) return Boolean is
1963 if E /= No_Error_Msg
1965 -- Don't remove if location does not match
1967 and then Errors.Table (E).Optr = Loc
1969 -- Don't remove if not warning/info message. Note that we do
1970 -- not remove style messages here. They are warning messages
1971 -- but not ones we want removed in this context.
1973 and then Errors.Table (E).Warn
1975 -- Don't remove unconditional messages
1977 and then not Errors.Table (E).Uncond
1979 Warnings_Detected := Warnings_Detected - 1;
1982 -- No removal required
1989 -- Start of processing for Check_For_Warnings
1992 while To_Be_Removed (First_Error_Msg) loop
1993 First_Error_Msg := Errors.Table (First_Error_Msg).Next;
1996 if First_Error_Msg = No_Error_Msg then
1997 Last_Error_Msg := No_Error_Msg;
2000 E := First_Error_Msg;
2001 while E /= No_Error_Msg loop
2002 while To_Be_Removed (Errors.Table (E).Next) loop
2003 Errors.Table (E).Next :=
2004 Errors.Table (Errors.Table (E).Next).Next;
2006 if Errors.Table (E).Next = No_Error_Msg then
2007 Last_Error_Msg := E;
2011 E := Errors.Table (E).Next;
2014 if Nkind (N) = N_Raise_Constraint_Error
2015 and then Original_Node (N) /= N
2016 and then No (Condition (N))
2018 -- Warnings may have been posted on subexpressions of the original
2019 -- tree. We place the original node back on the tree to remove
2020 -- those warnings, whose sloc do not match those of any node in
2021 -- the current tree. Given that we are in unreachable code, this
2022 -- modification to the tree is harmless.
2025 Status : Traverse_Final_Result;
2028 if Is_List_Member (N) then
2029 Set_Condition (N, Original_Node (N));
2030 Status := Check_All_Warnings (Condition (N));
2032 Rewrite (N, Original_Node (N));
2033 Status := Check_All_Warnings (N);
2042 end Check_For_Warning;
2044 -- Start of processing for Remove_Warning_Messages
2047 if Warnings_Detected /= 0 then
2049 Discard : Traverse_Final_Result;
2050 pragma Warnings (Off, Discard);
2053 Discard := Check_All_Warnings (N);
2056 end Remove_Warning_Messages;
2058 procedure Remove_Warning_Messages (L : List_Id) is
2061 if Is_Non_Empty_List (L) then
2063 while Present (Stat) loop
2064 Remove_Warning_Messages (Stat);
2068 end Remove_Warning_Messages;
2070 ---------------------------
2071 -- Set_Identifier_Casing --
2072 ---------------------------
2074 procedure Set_Identifier_Casing
2075 (Identifier_Name : System.Address;
2076 File_Name : System.Address)
2078 Ident : constant Big_String_Ptr := To_Big_String_Ptr (Identifier_Name);
2079 File : constant Big_String_Ptr := To_Big_String_Ptr (File_Name);
2082 Desired_Case : Casing_Type := Mixed_Case;
2083 -- Casing required for result. Default value of Mixed_Case is used if
2084 -- for some reason we cannot find the right file name in the table.
2087 -- Get length of file name
2090 while File (Flen + 1) /= ASCII.NUL loop
2094 -- Loop through file names to find matching one. This is a bit slow,
2095 -- but we only do it in error situations so it is not so terrible.
2096 -- Note that if the loop does not exit, then the desired case will
2097 -- be left set to Mixed_Case, this can happen if the name was not
2098 -- in canonical form, and gets canonicalized on VMS. Possibly we
2099 -- could fix this by unconditinally canonicalizing these names ???
2101 for J in 1 .. Last_Source_File loop
2102 Get_Name_String (Full_Debug_Name (J));
2105 and then Name_Buffer (1 .. Name_Len) = String (File (1 .. Flen))
2107 Desired_Case := Identifier_Casing (J);
2112 -- Copy identifier as given to Name_Buffer
2114 for J in Name_Buffer'Range loop
2115 Name_Buffer (J) := Ident (J);
2117 if Name_Buffer (J) = ASCII.NUL then
2123 Set_Casing (Desired_Case);
2124 end Set_Identifier_Casing;
2126 -----------------------
2127 -- Set_Ignore_Errors --
2128 -----------------------
2130 procedure Set_Ignore_Errors (To : Boolean) is
2132 Errors_Must_Be_Ignored := To;
2133 end Set_Ignore_Errors;
2135 ------------------------------
2136 -- Set_Msg_Insertion_Column --
2137 ------------------------------
2139 procedure Set_Msg_Insertion_Column is
2141 if Style.RM_Column_Check then
2142 Set_Msg_Str (" in column ");
2143 Set_Msg_Int (Int (Error_Msg_Col) + 1);
2145 end Set_Msg_Insertion_Column;
2147 ----------------------------
2148 -- Set_Msg_Insertion_Node --
2149 ----------------------------
2151 procedure Set_Msg_Insertion_Node is
2156 Error_Msg_Node_1 = Error
2157 or else Error_Msg_Node_1 = Any_Type;
2159 if Error_Msg_Node_1 = Empty then
2160 Set_Msg_Blank_Conditional;
2161 Set_Msg_Str ("<empty>");
2163 elsif Error_Msg_Node_1 = Error then
2165 Set_Msg_Str ("<error>");
2167 elsif Error_Msg_Node_1 = Standard_Void_Type then
2169 Set_Msg_Str ("procedure name");
2172 Set_Msg_Blank_Conditional;
2176 K := Nkind (Error_Msg_Node_1);
2178 -- If we have operator case, skip quotes since name of operator
2179 -- itself will supply the required quotations. An operator can be
2180 -- an applied use in an expression or an explicit operator symbol,
2181 -- or an identifier whose name indicates it is an operator.
2184 or else K = N_Operator_Symbol
2185 or else K = N_Defining_Operator_Symbol
2186 or else ((K = N_Identifier or else K = N_Defining_Identifier)
2187 and then Is_Operator_Name (Chars (Error_Msg_Node_1)))
2189 Set_Msg_Node (Error_Msg_Node_1);
2191 -- Normal case, not an operator, surround with quotes
2195 Set_Qualification (Error_Msg_Qual_Level, Error_Msg_Node_1);
2196 Set_Msg_Node (Error_Msg_Node_1);
2201 -- The following assignment ensures that a second ampersand insertion
2202 -- character will correspond to the Error_Msg_Node_2 parameter. We
2203 -- suppress possible validity checks in case operating in -gnatVa mode,
2204 -- and Error_Msg_Node_2 is not needed and has not been set.
2207 pragma Suppress (Range_Check);
2209 Error_Msg_Node_1 := Error_Msg_Node_2;
2211 end Set_Msg_Insertion_Node;
2213 --------------------------------------
2214 -- Set_Msg_Insertion_Type_Reference --
2215 --------------------------------------
2217 procedure Set_Msg_Insertion_Type_Reference (Flag : Source_Ptr) is
2223 if Error_Msg_Node_1 = Standard_Void_Type then
2224 Set_Msg_Str ("package or procedure name");
2227 elsif Error_Msg_Node_1 = Standard_Exception_Type then
2228 Set_Msg_Str ("exception name");
2231 elsif Error_Msg_Node_1 = Any_Access
2232 or else Error_Msg_Node_1 = Any_Array
2233 or else Error_Msg_Node_1 = Any_Boolean
2234 or else Error_Msg_Node_1 = Any_Character
2235 or else Error_Msg_Node_1 = Any_Composite
2236 or else Error_Msg_Node_1 = Any_Discrete
2237 or else Error_Msg_Node_1 = Any_Fixed
2238 or else Error_Msg_Node_1 = Any_Integer
2239 or else Error_Msg_Node_1 = Any_Modular
2240 or else Error_Msg_Node_1 = Any_Numeric
2241 or else Error_Msg_Node_1 = Any_Real
2242 or else Error_Msg_Node_1 = Any_Scalar
2243 or else Error_Msg_Node_1 = Any_String
2245 Get_Unqualified_Decoded_Name_String (Chars (Error_Msg_Node_1));
2246 Set_Msg_Name_Buffer;
2249 elsif Error_Msg_Node_1 = Universal_Real then
2250 Set_Msg_Str ("type universal real");
2253 elsif Error_Msg_Node_1 = Universal_Integer then
2254 Set_Msg_Str ("type universal integer");
2257 elsif Error_Msg_Node_1 = Universal_Fixed then
2258 Set_Msg_Str ("type universal fixed");
2262 -- Special case of anonymous array
2264 if Nkind (Error_Msg_Node_1) in N_Entity
2265 and then Is_Array_Type (Error_Msg_Node_1)
2266 and then Present (Related_Array_Object (Error_Msg_Node_1))
2268 Set_Msg_Str ("type of ");
2269 Set_Msg_Node (Related_Array_Object (Error_Msg_Node_1));
2270 Set_Msg_Str (" declared");
2271 Set_Msg_Insertion_Line_Number
2272 (Sloc (Related_Array_Object (Error_Msg_Node_1)), Flag);
2276 -- If we fall through, it is not a special case, so first output
2277 -- the name of the type, preceded by private for a private type
2279 if Is_Private_Type (Error_Msg_Node_1) then
2280 Set_Msg_Str ("private type ");
2282 Set_Msg_Str ("type ");
2285 Ent := Error_Msg_Node_1;
2287 if Is_Internal_Name (Chars (Ent)) then
2288 Unwind_Internal_Type (Ent);
2291 -- Types in Standard are displayed as "Standard.name"
2293 if Sloc (Ent) <= Standard_Location then
2295 Set_Msg_Str ("Standard.");
2300 -- Types in other language defined units are displayed as
2301 -- "package-name.type-name"
2304 Is_Predefined_File_Name (Unit_File_Name (Get_Source_Unit (Ent)))
2306 Get_Unqualified_Decoded_Name_String
2307 (Unit_Name (Get_Source_Unit (Ent)));
2308 Name_Len := Name_Len - 2;
2310 Set_Casing (Mixed_Case);
2311 Set_Msg_Name_Buffer;
2313 Set_Casing (Mixed_Case);
2318 -- All other types display as "type name" defined at line xxx
2319 -- possibly qualified if qualification is requested.
2323 Set_Qualification (Error_Msg_Qual_Level, Ent);
2327 -- If Ent is an anonymous subprogram type, there is no name
2328 -- to print, so remove enclosing quotes.
2330 if Buffer_Ends_With ("""") then
2331 Buffer_Remove ("""");
2337 -- If the original type did not come from a predefined
2338 -- file, add the location where the type was defined.
2340 if Sloc (Error_Msg_Node_1) > Standard_Location
2342 not Is_Predefined_File_Name
2343 (Unit_File_Name (Get_Source_Unit (Error_Msg_Node_1)))
2345 Set_Msg_Str (" defined");
2346 Set_Msg_Insertion_Line_Number (Sloc (Error_Msg_Node_1), Flag);
2348 -- If it did come from a predefined file, deal with the case where
2349 -- this was a file with a generic instantiation from elsewhere.
2352 if Sloc (Error_Msg_Node_1) > Standard_Location then
2354 Iloc : constant Source_Ptr :=
2355 Instantiation_Location (Sloc (Error_Msg_Node_1));
2358 if Iloc /= No_Location
2359 and then not Suppress_Instance_Location
2361 Set_Msg_Str (" from instance");
2362 Set_Msg_Insertion_Line_Number (Iloc, Flag);
2367 end Set_Msg_Insertion_Type_Reference;
2369 ---------------------------------
2370 -- Set_Msg_Insertion_Unit_Name --
2371 ---------------------------------
2373 procedure Set_Msg_Insertion_Unit_Name (Suffix : Boolean := True) is
2375 if Error_Msg_Unit_1 = No_Unit_Name then
2378 elsif Error_Msg_Unit_1 = Error_Unit_Name then
2380 Set_Msg_Str ("<error>");
2383 Get_Unit_Name_String (Error_Msg_Unit_1, Suffix);
2386 Set_Msg_Name_Buffer;
2390 -- The following assignment ensures that a second percent insertion
2391 -- character will correspond to the Error_Msg_Unit_2 parameter. We
2392 -- suppress possible validity checks in case operating in -gnatVa mode,
2393 -- and Error_Msg_Unit_2 is not needed and has not been set.
2396 pragma Suppress (Range_Check);
2398 Error_Msg_Unit_1 := Error_Msg_Unit_2;
2400 end Set_Msg_Insertion_Unit_Name;
2406 procedure Set_Msg_Node (Node : Node_Id) is
2411 if Nkind (Node) = N_Designator then
2412 Set_Msg_Node (Name (Node));
2414 Set_Msg_Node (Identifier (Node));
2417 elsif Nkind (Node) = N_Defining_Program_Unit_Name then
2418 Set_Msg_Node (Name (Node));
2420 Set_Msg_Node (Defining_Identifier (Node));
2423 elsif Nkind (Node) = N_Selected_Component then
2424 Set_Msg_Node (Prefix (Node));
2426 Set_Msg_Node (Selector_Name (Node));
2430 -- The only remaining possibilities are identifiers, defining
2431 -- identifiers, pragmas, and pragma argument associations.
2433 if Nkind (Node) = N_Pragma then
2434 Nam := Pragma_Name (Node);
2436 -- The other cases have Chars fields, and we want to test for possible
2437 -- internal names, which generally represent something gone wrong. An
2438 -- exception is the case of internal type names, where we try to find a
2439 -- reasonable external representation for the external name
2441 elsif Is_Internal_Name (Chars (Node))
2443 ((Is_Entity_Name (Node)
2444 and then Present (Entity (Node))
2445 and then Is_Type (Entity (Node)))
2447 (Nkind (Node) = N_Defining_Identifier and then Is_Type (Node)))
2449 if Nkind (Node) = N_Identifier then
2450 Ent := Entity (Node);
2455 -- If the type is the designated type of an access_to_subprogram,
2456 -- there is no name to provide in the call.
2458 if Ekind (Ent) = E_Subprogram_Type then
2461 Unwind_Internal_Type (Ent);
2465 -- If not internal name, just use name in Chars field
2468 Nam := Chars (Node);
2471 -- At this stage, the name to output is in Nam
2473 Get_Unqualified_Decoded_Name_String (Nam);
2475 -- Remove trailing upper case letters from the name (useful for
2476 -- dealing with some cases of internal names.
2478 while Name_Len > 1 and then Name_Buffer (Name_Len) in 'A' .. 'Z' loop
2479 Name_Len := Name_Len - 1;
2482 -- If we have any of the names from standard that start with the
2483 -- characters "any " (e.g. Any_Type), then kill the message since
2484 -- almost certainly it is a junk cascaded message.
2487 and then Name_Buffer (1 .. 4) = "any "
2489 Kill_Message := True;
2492 -- Now we have to set the proper case. If we have a source location
2493 -- then do a check to see if the name in the source is the same name
2494 -- as the name in the Names table, except for possible differences
2495 -- in case, which is the case when we can copy from the source.
2498 Src_Loc : constant Source_Ptr := Sloc (Error_Msg_Node_1);
2499 Sbuffer : Source_Buffer_Ptr;
2501 Src_Ptr : Source_Ptr;
2507 -- For standard locations, always use mixed case
2509 if Src_Loc <= No_Location
2510 or else Sloc (Node) <= No_Location
2512 Set_Casing (Mixed_Case);
2515 -- Determine if the reference we are dealing with corresponds
2516 -- to text at the point of the error reference. This will often
2517 -- be the case for simple identifier references, and is the case
2518 -- where we can copy the spelling from the source.
2520 Sbuffer := Source_Text (Get_Source_File_Index (Src_Loc));
2522 while Ref_Ptr <= Name_Len loop
2524 Fold_Lower (Sbuffer (Src_Ptr)) /=
2525 Fold_Lower (Name_Buffer (Ref_Ptr));
2526 Ref_Ptr := Ref_Ptr + 1;
2527 Src_Ptr := Src_Ptr + 1;
2530 -- If we get through the loop without a mismatch, then output
2531 -- the name the way it is spelled in the source program
2533 if Ref_Ptr > Name_Len then
2536 for J in 1 .. Name_Len loop
2537 Name_Buffer (J) := Sbuffer (Src_Ptr);
2538 Src_Ptr := Src_Ptr + 1;
2541 -- Otherwise set the casing using the default identifier casing
2544 Set_Casing (Identifier_Casing (Flag_Source), Mixed_Case);
2549 Set_Msg_Name_Buffer;
2557 procedure Set_Msg_Text (Text : String; Flag : Source_Ptr) is
2558 C : Character; -- Current character
2559 P : Natural; -- Current index;
2562 Manual_Quote_Mode := False;
2563 Is_Unconditional_Msg := False;
2565 Flag_Source := Get_Source_File_Index (Flag);
2568 while P <= Text'Last loop
2572 -- Check for insertion character or sequence
2576 if P <= Text'Last and then Text (P) = '%' then
2578 Set_Msg_Insertion_Name_Literal;
2580 Set_Msg_Insertion_Name;
2584 if P <= Text'Last and then Text (P) = '$' then
2586 Set_Msg_Insertion_Unit_Name (Suffix => False);
2589 Set_Msg_Insertion_Unit_Name;
2593 Set_Msg_Insertion_File_Name;
2596 Set_Msg_Insertion_Type_Reference (Flag);
2599 Set_Msg_Insertion_Reserved_Name;
2602 Set_Msg_Insertion_Node;
2605 Set_Msg_Insertion_Line_Number (Error_Msg_Sloc, Flag);
2608 Continuation := True;
2610 if Text (P) = '\' then
2611 Continuation_New_Line := True;
2616 Set_Msg_Insertion_Column;
2619 Set_Msg_Insertion_Run_Time_Name;
2622 Set_Msg_Insertion_Uint;
2625 Manual_Quote_Mode := not Manual_Quote_Mode;
2629 Is_Unconditional_Msg := True;
2632 null; -- already dealt with
2635 null; -- already dealt with
2638 null; -- already dealt with
2641 Set_Msg_Char (Text (P));
2645 Set_Msg_Str (Error_Msg_String (1 .. Error_Msg_Strlen));
2647 -- Upper case letter
2651 -- Start of reserved word if two or more
2653 if P <= Text'Last and then Text (P) in 'A' .. 'Z' then
2655 Set_Msg_Insertion_Reserved_Word (Text, P);
2657 -- Single upper case letter is just inserted
2663 -- Normal character with no special treatment
2677 procedure Set_Posted (N : Node_Id) is
2681 if Is_Serious_Error then
2683 -- We always set Error_Posted on the node itself
2685 Set_Error_Posted (N);
2687 -- If it is a subexpression, then set Error_Posted on parents
2688 -- up to and including the first non-subexpression construct. This
2689 -- helps avoid cascaded error messages within a single expression.
2695 Set_Error_Posted (P);
2696 exit when Nkind (P) not in N_Subexpr;
2699 -- A special check, if we just posted an error on an attribute
2700 -- definition clause, then also set the entity involved as posted.
2701 -- For example, this stops complaining about the alignment after
2702 -- complaining about the size, which is likely to be useless.
2704 if Nkind (P) = N_Attribute_Definition_Clause then
2705 if Is_Entity_Name (Name (P)) then
2706 Set_Error_Posted (Entity (Name (P)));
2712 -----------------------
2713 -- Set_Qualification --
2714 -----------------------
2716 procedure Set_Qualification (N : Nat; E : Entity_Id) is
2718 if N /= 0 and then Scope (E) /= Standard_Standard then
2719 Set_Qualification (N - 1, Scope (E));
2720 Set_Msg_Node (Scope (E));
2723 end Set_Qualification;
2725 ------------------------
2726 -- Special_Msg_Delete --
2727 ------------------------
2729 function Special_Msg_Delete
2731 N : Node_Or_Entity_Id;
2732 E : Node_Or_Entity_Id) return Boolean
2735 -- Never delete messages in -gnatdO mode
2737 if Debug_Flag_OO then
2740 -- When an atomic object refers to a non-atomic type in the same
2741 -- scope, we implicitly make the type atomic. In the non-error
2742 -- case this is surely safe (and in fact prevents an error from
2743 -- occurring if the type is not atomic by default). But if the
2744 -- object cannot be made atomic, then we introduce an extra junk
2745 -- message by this manipulation, which we get rid of here.
2747 -- We identify this case by the fact that it references a type for
2748 -- which Is_Atomic is set, but there is no Atomic pragma setting it.
2750 elsif Msg = "atomic access to & cannot be guaranteed"
2751 and then Is_Type (E)
2752 and then Is_Atomic (E)
2753 and then No (Get_Rep_Pragma (E, Name_Atomic))
2757 -- When a size is wrong for a frozen type there is no explicit
2758 -- size clause, and other errors have occurred, suppress the
2759 -- message, since it is likely that this size error is a cascaded
2760 -- result of other errors. The reason we eliminate unfrozen types
2761 -- is that messages issued before the freeze type are for sure OK.
2763 elsif Msg = "size for& too small, minimum allowed is ^"
2764 and then Is_Frozen (E)
2765 and then Serious_Errors_Detected > 0
2766 and then Nkind (N) /= N_Component_Clause
2767 and then Nkind (Parent (N)) /= N_Component_Clause
2769 No (Get_Attribute_Definition_Clause (E, Attribute_Size))
2771 No (Get_Attribute_Definition_Clause (E, Attribute_Object_Size))
2773 No (Get_Attribute_Definition_Clause (E, Attribute_Value_Size))
2777 -- All special tests complete, so go ahead with message
2782 end Special_Msg_Delete;
2784 --------------------------
2785 -- Unwind_Internal_Type --
2786 --------------------------
2788 procedure Unwind_Internal_Type (Ent : in out Entity_Id) is
2789 Derived : Boolean := False;
2791 Old_Ent : Entity_Id;
2794 -- Undo placement of a quote, since we will put it back later
2796 Mchar := Msg_Buffer (Msglen);
2799 Msglen := Msglen - 1;
2802 -- The loop here deals with recursive types, we are trying to
2803 -- find a related entity that is not an implicit type. Note
2804 -- that the check with Old_Ent stops us from getting "stuck".
2805 -- Also, we don't output the "type derived from" message more
2806 -- than once in the case where we climb up multiple levels.
2811 -- Implicit access type, use directly designated type
2812 -- In Ada 2005, the designated type may be an anonymous access to
2813 -- subprogram, in which case we can only point to its definition.
2815 if Is_Access_Type (Ent) then
2816 if Ekind (Ent) = E_Access_Subprogram_Type
2817 or else Ekind (Ent) = E_Anonymous_Access_Subprogram_Type
2818 or else Is_Access_Protected_Subprogram_Type (Ent)
2820 Ent := Directly_Designated_Type (Ent);
2822 if not Comes_From_Source (Ent) then
2823 if Buffer_Ends_With ("type ") then
2824 Buffer_Remove ("type ");
2827 Set_Msg_Str ("access to subprogram with profile ");
2829 elsif Ekind (Ent) = E_Function then
2830 Set_Msg_Str ("access to function ");
2832 Set_Msg_Str ("access to procedure ");
2836 -- Type is access to object, named or anonymous
2839 Set_Msg_Str ("access to ");
2840 Ent := Directly_Designated_Type (Ent);
2845 elsif Is_Class_Wide_Type (Ent) then
2847 Ent := Root_Type (Ent);
2849 -- Use base type if this is a subtype
2851 elsif Ent /= Base_Type (Ent) then
2852 Buffer_Remove ("type ");
2854 -- Avoid duplication "subtype of subtype of", and also replace
2855 -- "derived from subtype of" simply by "derived from"
2857 if not Buffer_Ends_With ("subtype of ")
2858 and then not Buffer_Ends_With ("derived from ")
2860 Set_Msg_Str ("subtype of ");
2863 Ent := Base_Type (Ent);
2865 -- If this is a base type with a first named subtype, use the
2866 -- first named subtype instead. This is not quite accurate in
2867 -- all cases, but it makes too much noise to be accurate and
2868 -- add 'Base in all cases. Note that we only do this is the
2869 -- first named subtype is not itself an internal name. This
2870 -- avoids the obvious loop (subtype->basetype->subtype) which
2871 -- would otherwise occur!)
2873 elsif Present (Freeze_Node (Ent))
2874 and then Present (First_Subtype_Link (Freeze_Node (Ent)))
2876 not Is_Internal_Name
2877 (Chars (First_Subtype_Link (Freeze_Node (Ent))))
2879 Ent := First_Subtype_Link (Freeze_Node (Ent));
2881 -- Otherwise use root type
2885 Buffer_Remove ("type ");
2887 -- Test for "subtype of type derived from" which seems
2888 -- excessive and is replaced by simply "type derived from"
2890 Buffer_Remove ("subtype of");
2892 -- Avoid duplication "type derived from type derived from"
2894 if not Buffer_Ends_With ("type derived from ") then
2895 Set_Msg_Str ("type derived from ");
2904 -- If we are stuck in a loop, get out and settle for the internal
2905 -- name after all. In this case we set to kill the message if it
2906 -- is not the first error message (we really try hard not to show
2907 -- the dirty laundry of the implementation to the poor user!)
2909 if Ent = Old_Ent then
2910 Kill_Message := True;
2914 -- Get out if we finally found a non-internal name to use
2916 exit when not Is_Internal_Name (Chars (Ent));
2922 end Unwind_Internal_Type;
2928 procedure VMS_Convert is
2938 P := Msg_Buffer'First;
2944 if Msg_Buffer (P) = '-' then
2945 for G in Gnames'Range loop
2946 L := Gnames (G)'Length;
2948 -- See if we have "-ggg switch", where ggg is Gnames entry
2950 if P + L + 7 <= Msglen
2951 and then Msg_Buffer (P + 1 .. P + L) = Gnames (G).all
2952 and then Msg_Buffer (P + L + 1 .. P + L + 7) = " switch"
2954 -- Replace by "/vvv qualifier", where vvv is Vnames entry
2956 N := Vnames (G)'Length;
2957 Msg_Buffer (P + N + 11 .. Msglen + N - L + 3) :=
2958 Msg_Buffer (P + L + 8 .. Msglen);
2959 Msg_Buffer (P) := '/';
2960 Msg_Buffer (P + 1 .. P + N) := Vnames (G).all;
2961 Msg_Buffer (P + N + 1 .. P + N + 10) := " qualifier";
2963 Msglen := Msglen + N - L + 3;