1 ------------------------------------------------------------------------------
3 -- GNAT COMPILER COMPONENTS --
9 -- Copyright (C) 1992-2009, 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;
50 with Stylesw; use Stylesw;
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 error
57 -- message procedures should be ignored (when parsing irrelevant text in
58 -- 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 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
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 or else Is_Style_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 or else Is_Style_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.
687 if not Try_Semantics and then Current_Source_Unit /= No_Unit then
688 Set_Fatal_Error (Get_Source_Unit (Sptr));
690 end Handle_Serious_Error;
692 -- Start of processing for Error_Msg_Internal
695 if Raise_Exception_On_Error /= 0 then
696 raise Error_Msg_Exception;
699 Continuation := Msg_Cont;
700 Continuation_New_Line := False;
701 Suppress_Message := False;
702 Kill_Message := False;
703 Set_Msg_Text (Msg, Sptr);
705 -- Kill continuation if parent message killed
707 if Continuation and Last_Killed then
711 -- Return without doing anything if message is suppressed
714 and then not All_Errors_Mode
715 and then not Is_Warning_Msg
716 and then Msg (Msg'Last) /= '!'
718 if not Continuation then
725 -- Return without doing anything if message is killed and this
726 -- is not the first error message. The philosophy is that if we
727 -- get a weird error message and we already have had a message,
728 -- then we hope the weird message is a junk cascaded message
731 and then not All_Errors_Mode
732 and then Total_Errors_Detected /= 0
734 if not Continuation then
741 -- Special check for warning message to see if it should be output
743 if Is_Warning_Msg then
745 -- Immediate return if warning message and warnings are suppressed
747 if Warnings_Suppressed (Optr) or else Warnings_Suppressed (Sptr) then
748 Cur_Msg := No_Error_Msg;
752 -- If the flag location is in the main extended source unit
753 -- then for sure we want the warning since it definitely belongs
755 if In_Extended_Main_Source_Unit (Sptr) then
758 -- If the flag location is not in the main extended source unit,
759 -- then we want to eliminate the warning, unless it is in the
760 -- extended main code unit and we want warnings on the instance.
762 elsif In_Extended_Main_Code_Unit (Sptr) and then Warn_On_Instance then
765 -- Keep warning if debug flag G set
767 elsif Debug_Flag_GG then
770 -- Keep warning if message text ends in !!
772 elsif Msg (Msg'Last) = '!' and then Msg (Msg'Last - 1) = '!' then
775 -- Here is where we delete a warning from a with'ed unit
778 Cur_Msg := No_Error_Msg;
780 if not Continuation then
788 -- If message is to be ignored in special ignore message mode, this is
789 -- where we do this special processing, bypassing message output.
791 if Ignore_Errors_Enable > 0 then
792 if Is_Serious_Error then
793 Handle_Serious_Error;
799 -- If error message line length set, and this is a continuation message
800 -- then all we do is to append the text to the text of the last message
801 -- with a comma space separator (eliminating a possible (style) or
804 if Error_Msg_Line_Length /= 0
805 and then Continuation
807 Cur_Msg := Errors.Last;
810 Oldm : String_Ptr := Errors.Table (Cur_Msg).Text;
811 Newm : String (1 .. Oldm'Last + 2 + Msglen);
816 -- First copy old message to new one and free it
818 Newm (Oldm'Range) := Oldm.all;
822 -- Remove (style) or info: at start of message
824 if Msglen > 8 and then Msg_Buffer (1 .. 8) = "(style) " then
827 elsif Msglen > 6 and then Msg_Buffer (1 .. 6) = "info: " then
834 -- Now deal with separation between messages. Normally this is
835 -- simply comma space, but there are some special cases.
837 -- If continuation new line, then put actual NL character in msg
839 if Continuation_New_Line then
841 Newm (Newl) := ASCII.LF;
843 -- If continuation message is enclosed in parentheses, then
844 -- special treatment (don't need a comma, and we want to combine
845 -- successive parenthetical remarks into a single one with
846 -- separating commas).
848 elsif Msg_Buffer (M) = '(' and then Msg_Buffer (Msglen) = ')' then
850 -- Case where existing message ends in right paren, remove
851 -- and separate parenthetical remarks with a comma.
853 if Newm (Newl) = ')' then
855 Msg_Buffer (M) := ' ';
857 -- Case where we are adding new parenthetical comment
864 -- Case where continuation not in parens and no new line
867 Newm (Newl + 1 .. Newl + 2) := ", ";
871 -- Append new message
873 Newm (Newl + 1 .. Newl + Msglen - M + 1) :=
874 Msg_Buffer (M .. Msglen);
875 Newl := Newl + Msglen - M + 1;
876 Errors.Table (Cur_Msg).Text := new String'(Newm (1 .. Newl));
882 -- Otherwise build error message object for new message
885 ((Text => new String'(Msg_Buffer (1 .. Msglen)),
886 Next => No_Error_Msg,
889 Sfile => Get_Source_File_Index (Sptr),
890 Line => Get_Physical_Line_Number (Sptr),
891 Col => Get_Column_Number (Sptr),
892 Warn => Is_Warning_Msg,
893 Style => Is_Style_Msg,
894 Serious => Is_Serious_Error,
895 Uncond => Is_Unconditional_Msg,
896 Msg_Cont => Continuation,
898 Cur_Msg := Errors.Last;
900 -- If immediate errors mode set, output error message now. Also output
901 -- now if the -d1 debug flag is set (so node number message comes out
902 -- just before actual error message)
904 if Debug_Flag_OO or else Debug_Flag_1 then
907 (Errors.Table (Cur_Msg).Line, Errors.Table (Cur_Msg).Sfile, True);
909 Output_Error_Msgs (Temp_Msg);
911 -- If not in immediate errors mode, then we insert the message in the
912 -- error chain for later output by Finalize. The messages are sorted
913 -- first by unit (main unit comes first), and within a unit by source
914 -- location (earlier flag location first in the chain).
917 -- First a quick check, does this belong at the very end of the chain
918 -- of error messages. This saves a lot of time in the normal case if
919 -- there are lots of messages.
921 if Last_Error_Msg /= No_Error_Msg
922 and then Errors.Table (Cur_Msg).Sfile =
923 Errors.Table (Last_Error_Msg).Sfile
924 and then (Sptr > Errors.Table (Last_Error_Msg).Sptr
926 (Sptr = Errors.Table (Last_Error_Msg).Sptr
928 Optr > Errors.Table (Last_Error_Msg).Optr))
930 Prev_Msg := Last_Error_Msg;
931 Next_Msg := No_Error_Msg;
933 -- Otherwise do a full sequential search for the insertion point
936 Prev_Msg := No_Error_Msg;
937 Next_Msg := First_Error_Msg;
938 while Next_Msg /= No_Error_Msg loop
940 Errors.Table (Cur_Msg).Sfile < Errors.Table (Next_Msg).Sfile;
942 if Errors.Table (Cur_Msg).Sfile =
943 Errors.Table (Next_Msg).Sfile
945 exit when Sptr < Errors.Table (Next_Msg).Sptr
947 (Sptr = Errors.Table (Next_Msg).Sptr
949 Optr < Errors.Table (Next_Msg).Optr);
952 Prev_Msg := Next_Msg;
953 Next_Msg := Errors.Table (Next_Msg).Next;
957 -- Now we insert the new message in the error chain. The insertion
958 -- point for the message is after Prev_Msg and before Next_Msg.
960 -- The possible insertion point for the new message is after Prev_Msg
961 -- and before Next_Msg. However, this is where we do a special check
962 -- for redundant parsing messages, defined as messages posted on the
963 -- same line. The idea here is that probably such messages are junk
964 -- from the parser recovering. In full errors mode, we don't do this
965 -- deletion, but otherwise such messages are discarded at this stage.
967 if Prev_Msg /= No_Error_Msg
968 and then Errors.Table (Prev_Msg).Line =
969 Errors.Table (Cur_Msg).Line
970 and then Errors.Table (Prev_Msg).Sfile =
971 Errors.Table (Cur_Msg).Sfile
972 and then Compiler_State = Parsing
973 and then not All_Errors_Mode
975 -- Don't delete unconditional messages and at this stage, don't
976 -- delete continuation lines (we attempted to delete those earlier
977 -- if the parent message was deleted.
979 if not Errors.Table (Cur_Msg).Uncond
980 and then not Continuation
982 -- Don't delete if prev msg is warning and new msg is an error.
983 -- This is because we don't want a real error masked by a
984 -- warning. In all other cases (that is parse errors for the
985 -- same line that are not unconditional) we do delete the
986 -- message. This helps to avoid junk extra messages from
987 -- cascaded parsing errors
989 if not (Errors.Table (Prev_Msg).Warn
991 Errors.Table (Prev_Msg).Style)
993 (Errors.Table (Cur_Msg).Warn
995 Errors.Table (Cur_Msg).Style)
997 -- All tests passed, delete the message by simply returning
998 -- without any further processing.
1000 if not Continuation then
1001 Last_Killed := True;
1009 -- Come here if message is to be inserted in the error chain
1011 if not Continuation then
1012 Last_Killed := False;
1015 if Prev_Msg = No_Error_Msg then
1016 First_Error_Msg := Cur_Msg;
1018 Errors.Table (Prev_Msg).Next := Cur_Msg;
1021 Errors.Table (Cur_Msg).Next := Next_Msg;
1023 if Next_Msg = No_Error_Msg then
1024 Last_Error_Msg := Cur_Msg;
1028 -- Bump appropriate statistics count
1030 if Errors.Table (Cur_Msg).Warn or else Errors.Table (Cur_Msg).Style then
1031 Warnings_Detected := Warnings_Detected + 1;
1034 Total_Errors_Detected := Total_Errors_Detected + 1;
1036 if Errors.Table (Cur_Msg).Serious then
1037 Serious_Errors_Detected := Serious_Errors_Detected + 1;
1038 Handle_Serious_Error;
1042 -- If too many warnings turn off warnings
1044 if Maximum_Messages /= 0 then
1045 if Warnings_Detected = Maximum_Messages then
1046 Warning_Mode := Suppress;
1049 -- If too many errors abandon compilation
1051 if Total_Errors_Detected = Maximum_Messages then
1052 raise Unrecoverable_Error;
1055 end Error_Msg_Internal;
1061 procedure Error_Msg_N (Msg : String; N : Node_Or_Entity_Id) is
1063 Error_Msg_NEL (Msg, N, N, Sloc (N));
1070 procedure Error_Msg_NE
1072 N : Node_Or_Entity_Id;
1073 E : Node_Or_Entity_Id)
1076 Error_Msg_NEL (Msg, N, E, Sloc (N));
1083 procedure Error_Msg_NEL
1085 N : Node_Or_Entity_Id;
1086 E : Node_Or_Entity_Id;
1087 Flag_Location : Source_Ptr)
1090 if Special_Msg_Delete (Msg, N, E) then
1094 Test_Style_Warning_Serious_Msg (Msg);
1096 -- Special handling for warning messages
1098 if Is_Warning_Msg then
1100 -- Suppress if no warnings set for either entity or node
1102 if No_Warnings (N) or else No_Warnings (E) then
1104 -- Disable any continuation messages as well
1106 Last_Killed := True;
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 then 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
1389 ((Start => Source_Ptr'First, Stop => Source_Ptr'Last));
1397 function No_Warnings (N : Node_Or_Entity_Id) return Boolean is
1399 if Error_Posted (N) then
1402 elsif Nkind (N) in N_Entity and then Has_Warnings_Off (N) then
1405 elsif Is_Entity_Name (N)
1406 and then Present (Entity (N))
1407 and then Has_Warnings_Off (Entity (N))
1420 function OK_Node (N : Node_Id) return Boolean is
1421 K : constant Node_Kind := Nkind (N);
1424 if Error_Posted (N) then
1427 elsif K in N_Has_Etype
1428 and then Present (Etype (N))
1429 and then Error_Posted (Etype (N))
1434 or else K = N_Attribute_Reference
1435 or else K = N_Character_Literal
1436 or else K = N_Expanded_Name
1437 or else K = N_Identifier
1438 or else K = N_Operator_Symbol)
1439 and then Present (Entity (N))
1440 and then Error_Posted (Entity (N))
1448 ---------------------
1449 -- Output_Messages --
1450 ---------------------
1452 procedure Output_Messages is
1456 procedure Write_Error_Summary;
1457 -- Write error summary
1459 procedure Write_Header (Sfile : Source_File_Index);
1460 -- Write header line (compiling or checking given file)
1462 procedure Write_Max_Errors;
1463 -- Write message if max errors reached
1465 -------------------------
1466 -- Write_Error_Summary --
1467 -------------------------
1469 procedure Write_Error_Summary is
1471 -- Extra blank line if error messages or source listing were output
1473 if Total_Errors_Detected + Warnings_Detected > 0
1479 -- Message giving number of lines read and number of errors detected.
1480 -- This normally goes to Standard_Output. The exception is when brief
1481 -- mode is not set, verbose mode (or full list mode) is set, and
1482 -- there are errors. In this case we send the message to standard
1483 -- error to make sure that *something* appears on standard error in
1484 -- an error situation.
1486 -- Formerly, only the "# errors" suffix was sent to stderr, whereas
1487 -- "# lines:" appeared on stdout. This caused problems on VMS when
1488 -- the stdout buffer was flushed, giving an extra line feed after
1491 if Total_Errors_Detected + Warnings_Detected /= 0
1492 and then not Brief_Output
1493 and then (Verbose_Mode or Full_List)
1498 -- Message giving total number of lines
1501 Write_Int (Num_Source_Lines (Main_Source_File));
1503 if Num_Source_Lines (Main_Source_File) = 1 then
1504 Write_Str (" line: ");
1506 Write_Str (" lines: ");
1509 if Total_Errors_Detected = 0 then
1510 Write_Str ("No errors");
1512 elsif Total_Errors_Detected = 1 then
1513 Write_Str ("1 error");
1516 Write_Int (Total_Errors_Detected);
1517 Write_Str (" errors");
1520 if Warnings_Detected /= 0 then
1522 Write_Int (Warnings_Detected);
1523 Write_Str (" warning");
1525 if Warnings_Detected /= 1 then
1529 if Warning_Mode = Treat_As_Error then
1530 Write_Str (" (treated as error");
1532 if Warnings_Detected /= 1 then
1541 Set_Standard_Output;
1542 end Write_Error_Summary;
1548 procedure Write_Header (Sfile : Source_File_Index) is
1550 if Verbose_Mode or Full_List then
1551 if Original_Operating_Mode = Generate_Code then
1552 Write_Str ("Compiling: ");
1554 Write_Str ("Checking: ");
1557 Write_Name (Full_File_Name (Sfile));
1559 if not Debug_Flag_7 then
1560 Write_Str (" (source file time stamp: ");
1561 Write_Time_Stamp (Sfile);
1569 ----------------------
1570 -- Write_Max_Errors --
1571 ----------------------
1573 procedure Write_Max_Errors is
1575 if Maximum_Messages /= 0 then
1576 if Warnings_Detected >= Maximum_Messages then
1578 Write_Line ("maximum number of warnings output");
1579 Write_Line ("any further warnings suppressed");
1580 Set_Standard_Output;
1583 -- If too many errors print message
1585 if Total_Errors_Detected >= Maximum_Messages then
1587 Write_Line ("fatal error: maximum number of errors detected");
1588 Set_Standard_Output;
1591 end Write_Max_Errors;
1593 -- Start of processing for Output_Messages
1596 -- Error if Finalize has not been called
1598 if not Finalize_Called then
1599 raise Program_Error;
1602 -- Reset current error source file if the main unit has a pragma
1603 -- Source_Reference. This ensures outputting the proper name of
1604 -- the source file in this situation.
1606 if Main_Source_File = No_Source_File
1607 or else Num_SRef_Pragmas (Main_Source_File) /= 0
1609 Current_Error_Source_File := No_Source_File;
1614 if Brief_Output or (not Full_List and not Verbose_Mode) then
1617 E := First_Error_Msg;
1618 while E /= No_Error_Msg loop
1619 if not Errors.Table (E).Deleted and then not Debug_Flag_KK then
1620 if Full_Path_Name_For_Brief_Errors then
1621 Write_Name (Full_Ref_Name (Errors.Table (E).Sfile));
1623 Write_Name (Reference_Name (Errors.Table (E).Sfile));
1627 Write_Int (Int (Physical_To_Logical
1628 (Errors.Table (E).Line,
1629 Errors.Table (E).Sfile)));
1632 if Errors.Table (E).Col < 10 then
1636 Write_Int (Int (Errors.Table (E).Col));
1638 Output_Msg_Text (E);
1642 E := Errors.Table (E).Next;
1645 Set_Standard_Output;
1648 -- Full source listing case
1651 List_Pragmas_Index := 1;
1652 List_Pragmas_Mode := True;
1653 E := First_Error_Msg;
1655 -- Normal case, to stdout (copyright notice already output)
1657 if Full_List_File_Name = null then
1658 if not Debug_Flag_7 then
1665 Create_List_File_Access.all (Full_List_File_Name.all);
1666 Set_Special_Output (Write_List_Info_Access.all'Access);
1668 -- Write copyright notice to file
1670 if not Debug_Flag_7 then
1671 Write_Str ("GNAT ");
1672 Write_Str (Gnat_Version_String);
1674 Write_Str ("Copyright 1992-" &
1676 ", Free Software Foundation, Inc.");
1681 -- First list extended main source file units with errors
1683 for U in Main_Unit .. Last_Unit loop
1684 if In_Extended_Main_Source_Unit (Cunit_Entity (U))
1686 -- If debug flag d.m is set, only the main source is listed
1688 and then (U = Main_Unit or else not Debug_Flag_Dot_M)
1690 -- If the unit of the entity does not come from source, it is
1691 -- an implicit subprogram declaration for a child subprogram.
1692 -- Do not emit errors for it, they are listed with the body.
1695 (No (Cunit_Entity (U))
1696 or else Comes_From_Source (Cunit_Entity (U))
1697 or else not Is_Subprogram (Cunit_Entity (U)))
1700 Sfile : constant Source_File_Index := Source_Index (U);
1704 Write_Header (Sfile);
1707 -- Normally, we don't want an "error messages from file"
1708 -- message when listing the entire file, so we set the
1709 -- current source file as the current error source file.
1710 -- However, the old style of doing things was to list this
1711 -- message if pragma Source_Reference is present, even for
1712 -- the main unit. Since the purpose of the -gnatd.m switch
1713 -- is to duplicate the old behavior, we skip the reset if
1714 -- this debug flag is set.
1716 if not Debug_Flag_Dot_M then
1717 Current_Error_Source_File := Sfile;
1720 for N in 1 .. Last_Source_Line (Sfile) loop
1721 while E /= No_Error_Msg
1722 and then Errors.Table (E).Deleted
1724 E := Errors.Table (E).Next;
1729 and then Errors.Table (E).Line = N
1730 and then Errors.Table (E).Sfile = Sfile;
1732 Output_Source_Line (N, Sfile, Err_Flag);
1735 Output_Error_Msgs (E);
1737 if not Debug_Flag_2 then
1746 -- Then output errors, if any, for subsidiary units not in the
1747 -- main extended unit.
1749 -- Note: if debug flag d.m set, include errors for any units other
1750 -- than the main unit in the extended source unit (e.g. spec and
1751 -- subunits for a body).
1753 while E /= No_Error_Msg
1754 and then (not In_Extended_Main_Source_Unit (Errors.Table (E).Sptr)
1757 and then Get_Source_Unit
1758 (Errors.Table (E).Sptr) /= Main_Unit))
1760 if Errors.Table (E).Deleted then
1761 E := Errors.Table (E).Next;
1766 (Errors.Table (E).Line, Errors.Table (E).Sfile, True);
1767 Output_Error_Msgs (E);
1771 -- If output to file, write extra copy of error summary to the
1772 -- output file, and then close it.
1774 if Full_List_File_Name /= null then
1775 Write_Error_Summary;
1777 Close_List_File_Access.all;
1778 Cancel_Special_Output;
1782 -- Verbose mode (error lines only with error flags). Normally this is
1783 -- ignored in full list mode, unless we are listing to a file, in which
1784 -- case we still generate -gnatv output to standard output.
1787 and then (not Full_List or else Full_List_File_Name /= null)
1790 Write_Header (Main_Source_File);
1791 E := First_Error_Msg;
1793 -- Loop through error lines
1795 while E /= No_Error_Msg loop
1796 if Errors.Table (E).Deleted then
1797 E := Errors.Table (E).Next;
1801 (Errors.Table (E).Line, Errors.Table (E).Sfile, True);
1802 Output_Error_Msgs (E);
1807 -- Output error summary if verbose or full list mode
1809 if Verbose_Mode or else Full_List then
1810 Write_Error_Summary;
1815 if Warning_Mode = Treat_As_Error then
1816 Total_Errors_Detected := Total_Errors_Detected + Warnings_Detected;
1817 Warnings_Detected := 0;
1819 end Output_Messages;
1821 ------------------------
1822 -- Output_Source_Line --
1823 ------------------------
1825 procedure Output_Source_Line
1826 (L : Physical_Line_Number;
1827 Sfile : Source_File_Index;
1833 Line_Number_Output : Boolean := False;
1834 -- Set True once line number is output
1836 Empty_Line : Boolean := True;
1837 -- Set False if line includes at least one character
1840 if Sfile /= Current_Error_Source_File then
1841 Write_Str ("==============Error messages for ");
1843 case Sinput.File_Type (Sfile) is
1845 Write_Str ("source");
1847 when Sinput.Config =>
1848 Write_Str ("configuration pragmas");
1851 Write_Str ("symbol definition");
1853 when Sinput.Preproc =>
1854 Write_Str ("preprocessing data");
1857 Write_Str (" file: ");
1858 Write_Name (Full_File_Name (Sfile));
1861 if Num_SRef_Pragmas (Sfile) > 0 then
1862 Write_Str ("--------------Line numbers from file: ");
1863 Write_Name (Full_Ref_Name (Sfile));
1864 Write_Str (" (starting at line ");
1865 Write_Int (Int (First_Mapped_Line (Sfile)));
1870 Current_Error_Source_File := Sfile;
1873 if Errs or List_Pragmas_Mode then
1874 Output_Line_Number (Physical_To_Logical (L, Sfile));
1875 Line_Number_Output := True;
1878 S := Line_Start (L, Sfile);
1881 C := Source_Text (Sfile) (S);
1882 exit when C = ASCII.LF or else C = ASCII.CR or else C = EOF;
1884 -- Deal with matching entry in List_Pragmas table
1887 and then List_Pragmas_Index <= List_Pragmas.Last
1888 and then S = List_Pragmas.Table (List_Pragmas_Index).Ploc
1890 case List_Pragmas.Table (List_Pragmas_Index).Ptyp is
1894 -- Ignore if on line with errors so that error flags
1895 -- get properly listed with the error line .
1898 Write_Char (ASCII.FF);
1902 List_Pragmas_Mode := True;
1904 if not Line_Number_Output then
1905 Output_Line_Number (Physical_To_Logical (L, Sfile));
1906 Line_Number_Output := True;
1913 List_Pragmas_Mode := False;
1916 List_Pragmas_Index := List_Pragmas_Index + 1;
1918 -- Normal case (no matching entry in List_Pragmas table)
1921 if Errs or List_Pragmas_Mode then
1926 Empty_Line := False;
1930 -- If we have output a source line, then add the line terminator, with
1931 -- training spaces preserved (so we output the line exactly as input).
1933 if Line_Number_Output then
1937 Write_Eol_Keep_Blanks;
1940 end Output_Source_Line;
1942 -----------------------------
1943 -- Remove_Warning_Messages --
1944 -----------------------------
1946 procedure Remove_Warning_Messages (N : Node_Id) is
1948 function Check_For_Warning (N : Node_Id) return Traverse_Result;
1949 -- This function checks one node for a possible warning message
1951 function Check_All_Warnings is new Traverse_Func (Check_For_Warning);
1952 -- This defines the traversal operation
1954 -----------------------
1955 -- Check_For_Warning --
1956 -----------------------
1958 function Check_For_Warning (N : Node_Id) return Traverse_Result is
1959 Loc : constant Source_Ptr := Sloc (N);
1962 function To_Be_Removed (E : Error_Msg_Id) return Boolean;
1963 -- Returns True for a message that is to be removed. Also adjusts
1964 -- warning count appropriately.
1970 function To_Be_Removed (E : Error_Msg_Id) return Boolean is
1972 if E /= No_Error_Msg
1974 -- Don't remove if location does not match
1976 and then Errors.Table (E).Optr = Loc
1978 -- Don't remove if not warning/info message. Note that we do
1979 -- not remove style messages here. They are warning messages
1980 -- but not ones we want removed in this context.
1982 and then Errors.Table (E).Warn
1984 -- Don't remove unconditional messages
1986 and then not Errors.Table (E).Uncond
1988 Warnings_Detected := Warnings_Detected - 1;
1991 -- No removal required
1998 -- Start of processing for Check_For_Warnings
2001 while To_Be_Removed (First_Error_Msg) loop
2002 First_Error_Msg := Errors.Table (First_Error_Msg).Next;
2005 if First_Error_Msg = No_Error_Msg then
2006 Last_Error_Msg := No_Error_Msg;
2009 E := First_Error_Msg;
2010 while E /= No_Error_Msg loop
2011 while To_Be_Removed (Errors.Table (E).Next) loop
2012 Errors.Table (E).Next :=
2013 Errors.Table (Errors.Table (E).Next).Next;
2015 if Errors.Table (E).Next = No_Error_Msg then
2016 Last_Error_Msg := E;
2020 E := Errors.Table (E).Next;
2023 if Nkind (N) = N_Raise_Constraint_Error
2024 and then Original_Node (N) /= N
2025 and then No (Condition (N))
2027 -- Warnings may have been posted on subexpressions of the original
2028 -- tree. We place the original node back on the tree to remove
2029 -- those warnings, whose sloc do not match those of any node in
2030 -- the current tree. Given that we are in unreachable code, this
2031 -- modification to the tree is harmless.
2034 Status : Traverse_Final_Result;
2037 if Is_List_Member (N) then
2038 Set_Condition (N, Original_Node (N));
2039 Status := Check_All_Warnings (Condition (N));
2041 Rewrite (N, Original_Node (N));
2042 Status := Check_All_Warnings (N);
2051 end Check_For_Warning;
2053 -- Start of processing for Remove_Warning_Messages
2056 if Warnings_Detected /= 0 then
2058 Discard : Traverse_Final_Result;
2059 pragma Warnings (Off, Discard);
2062 Discard := Check_All_Warnings (N);
2065 end Remove_Warning_Messages;
2067 procedure Remove_Warning_Messages (L : List_Id) is
2070 if Is_Non_Empty_List (L) then
2072 while Present (Stat) loop
2073 Remove_Warning_Messages (Stat);
2077 end Remove_Warning_Messages;
2079 ---------------------------
2080 -- Set_Identifier_Casing --
2081 ---------------------------
2083 procedure Set_Identifier_Casing
2084 (Identifier_Name : System.Address;
2085 File_Name : System.Address)
2087 Ident : constant Big_String_Ptr := To_Big_String_Ptr (Identifier_Name);
2088 File : constant Big_String_Ptr := To_Big_String_Ptr (File_Name);
2091 Desired_Case : Casing_Type := Mixed_Case;
2092 -- Casing required for result. Default value of Mixed_Case is used if
2093 -- for some reason we cannot find the right file name in the table.
2096 -- Get length of file name
2099 while File (Flen + 1) /= ASCII.NUL loop
2103 -- Loop through file names to find matching one. This is a bit slow,
2104 -- but we only do it in error situations so it is not so terrible.
2105 -- Note that if the loop does not exit, then the desired case will
2106 -- be left set to Mixed_Case, this can happen if the name was not
2107 -- in canonical form, and gets canonicalized on VMS. Possibly we
2108 -- could fix this by unconditinally canonicalizing these names ???
2110 for J in 1 .. Last_Source_File loop
2111 Get_Name_String (Full_Debug_Name (J));
2114 and then Name_Buffer (1 .. Name_Len) = String (File (1 .. Flen))
2116 Desired_Case := Identifier_Casing (J);
2121 -- Copy identifier as given to Name_Buffer
2123 for J in Name_Buffer'Range loop
2124 Name_Buffer (J) := Ident (J);
2126 if Name_Buffer (J) = ASCII.NUL then
2132 Set_Casing (Desired_Case);
2133 end Set_Identifier_Casing;
2135 -----------------------
2136 -- Set_Ignore_Errors --
2137 -----------------------
2139 procedure Set_Ignore_Errors (To : Boolean) is
2141 Errors_Must_Be_Ignored := To;
2142 end Set_Ignore_Errors;
2144 ------------------------------
2145 -- Set_Msg_Insertion_Column --
2146 ------------------------------
2148 procedure Set_Msg_Insertion_Column is
2150 if RM_Column_Check then
2151 Set_Msg_Str (" in column ");
2152 Set_Msg_Int (Int (Error_Msg_Col) + 1);
2154 end Set_Msg_Insertion_Column;
2156 ----------------------------
2157 -- Set_Msg_Insertion_Node --
2158 ----------------------------
2160 procedure Set_Msg_Insertion_Node is
2165 Error_Msg_Node_1 = Error
2166 or else Error_Msg_Node_1 = Any_Type;
2168 if Error_Msg_Node_1 = Empty then
2169 Set_Msg_Blank_Conditional;
2170 Set_Msg_Str ("<empty>");
2172 elsif Error_Msg_Node_1 = Error then
2174 Set_Msg_Str ("<error>");
2176 elsif Error_Msg_Node_1 = Standard_Void_Type then
2178 Set_Msg_Str ("procedure name");
2181 Set_Msg_Blank_Conditional;
2185 K := Nkind (Error_Msg_Node_1);
2187 -- If we have operator case, skip quotes since name of operator
2188 -- itself will supply the required quotations. An operator can be
2189 -- an applied use in an expression or an explicit operator symbol,
2190 -- or an identifier whose name indicates it is an operator.
2193 or else K = N_Operator_Symbol
2194 or else K = N_Defining_Operator_Symbol
2195 or else ((K = N_Identifier or else K = N_Defining_Identifier)
2196 and then Is_Operator_Name (Chars (Error_Msg_Node_1)))
2198 Set_Msg_Node (Error_Msg_Node_1);
2200 -- Normal case, not an operator, surround with quotes
2204 Set_Qualification (Error_Msg_Qual_Level, Error_Msg_Node_1);
2205 Set_Msg_Node (Error_Msg_Node_1);
2210 -- The following assignment ensures that a second ampersand insertion
2211 -- character will correspond to the Error_Msg_Node_2 parameter. We
2212 -- suppress possible validity checks in case operating in -gnatVa mode,
2213 -- and Error_Msg_Node_2 is not needed and has not been set.
2216 pragma Suppress (Range_Check);
2218 Error_Msg_Node_1 := Error_Msg_Node_2;
2220 end Set_Msg_Insertion_Node;
2222 --------------------------------------
2223 -- Set_Msg_Insertion_Type_Reference --
2224 --------------------------------------
2226 procedure Set_Msg_Insertion_Type_Reference (Flag : Source_Ptr) is
2232 if Error_Msg_Node_1 = Standard_Void_Type then
2233 Set_Msg_Str ("package or procedure name");
2236 elsif Error_Msg_Node_1 = Standard_Exception_Type then
2237 Set_Msg_Str ("exception name");
2240 elsif Error_Msg_Node_1 = Any_Access
2241 or else Error_Msg_Node_1 = Any_Array
2242 or else Error_Msg_Node_1 = Any_Boolean
2243 or else Error_Msg_Node_1 = Any_Character
2244 or else Error_Msg_Node_1 = Any_Composite
2245 or else Error_Msg_Node_1 = Any_Discrete
2246 or else Error_Msg_Node_1 = Any_Fixed
2247 or else Error_Msg_Node_1 = Any_Integer
2248 or else Error_Msg_Node_1 = Any_Modular
2249 or else Error_Msg_Node_1 = Any_Numeric
2250 or else Error_Msg_Node_1 = Any_Real
2251 or else Error_Msg_Node_1 = Any_Scalar
2252 or else Error_Msg_Node_1 = Any_String
2254 Get_Unqualified_Decoded_Name_String (Chars (Error_Msg_Node_1));
2255 Set_Msg_Name_Buffer;
2258 elsif Error_Msg_Node_1 = Universal_Real then
2259 Set_Msg_Str ("type universal real");
2262 elsif Error_Msg_Node_1 = Universal_Integer then
2263 Set_Msg_Str ("type universal integer");
2266 elsif Error_Msg_Node_1 = Universal_Fixed then
2267 Set_Msg_Str ("type universal fixed");
2271 -- Special case of anonymous array
2273 if Nkind (Error_Msg_Node_1) in N_Entity
2274 and then Is_Array_Type (Error_Msg_Node_1)
2275 and then Present (Related_Array_Object (Error_Msg_Node_1))
2277 Set_Msg_Str ("type of ");
2278 Set_Msg_Node (Related_Array_Object (Error_Msg_Node_1));
2279 Set_Msg_Str (" declared");
2280 Set_Msg_Insertion_Line_Number
2281 (Sloc (Related_Array_Object (Error_Msg_Node_1)), Flag);
2285 -- If we fall through, it is not a special case, so first output
2286 -- the name of the type, preceded by private for a private type
2288 if Is_Private_Type (Error_Msg_Node_1) then
2289 Set_Msg_Str ("private type ");
2291 Set_Msg_Str ("type ");
2294 Ent := Error_Msg_Node_1;
2296 if Is_Internal_Name (Chars (Ent)) then
2297 Unwind_Internal_Type (Ent);
2300 -- Types in Standard are displayed as "Standard.name"
2302 if Sloc (Ent) <= Standard_Location then
2304 Set_Msg_Str ("Standard.");
2309 -- Types in other language defined units are displayed as
2310 -- "package-name.type-name"
2313 Is_Predefined_File_Name (Unit_File_Name (Get_Source_Unit (Ent)))
2315 Get_Unqualified_Decoded_Name_String
2316 (Unit_Name (Get_Source_Unit (Ent)));
2317 Name_Len := Name_Len - 2;
2319 Set_Casing (Mixed_Case);
2320 Set_Msg_Name_Buffer;
2322 Set_Casing (Mixed_Case);
2327 -- All other types display as "type name" defined at line xxx
2328 -- possibly qualified if qualification is requested.
2332 Set_Qualification (Error_Msg_Qual_Level, Ent);
2336 -- If Ent is an anonymous subprogram type, there is no name
2337 -- to print, so remove enclosing quotes.
2339 if Buffer_Ends_With ("""") then
2340 Buffer_Remove ("""");
2346 -- If the original type did not come from a predefined
2347 -- file, add the location where the type was defined.
2349 if Sloc (Error_Msg_Node_1) > Standard_Location
2351 not Is_Predefined_File_Name
2352 (Unit_File_Name (Get_Source_Unit (Error_Msg_Node_1)))
2354 Set_Msg_Str (" defined");
2355 Set_Msg_Insertion_Line_Number (Sloc (Error_Msg_Node_1), Flag);
2357 -- If it did come from a predefined file, deal with the case where
2358 -- this was a file with a generic instantiation from elsewhere.
2361 if Sloc (Error_Msg_Node_1) > Standard_Location then
2363 Iloc : constant Source_Ptr :=
2364 Instantiation_Location (Sloc (Error_Msg_Node_1));
2367 if Iloc /= No_Location
2368 and then not Suppress_Instance_Location
2370 Set_Msg_Str (" from instance");
2371 Set_Msg_Insertion_Line_Number (Iloc, Flag);
2376 end Set_Msg_Insertion_Type_Reference;
2378 ---------------------------------
2379 -- Set_Msg_Insertion_Unit_Name --
2380 ---------------------------------
2382 procedure Set_Msg_Insertion_Unit_Name (Suffix : Boolean := True) is
2384 if Error_Msg_Unit_1 = No_Unit_Name then
2387 elsif Error_Msg_Unit_1 = Error_Unit_Name then
2389 Set_Msg_Str ("<error>");
2392 Get_Unit_Name_String (Error_Msg_Unit_1, Suffix);
2395 Set_Msg_Name_Buffer;
2399 -- The following assignment ensures that a second percent insertion
2400 -- character will correspond to the Error_Msg_Unit_2 parameter. We
2401 -- suppress possible validity checks in case operating in -gnatVa mode,
2402 -- and Error_Msg_Unit_2 is not needed and has not been set.
2405 pragma Suppress (Range_Check);
2407 Error_Msg_Unit_1 := Error_Msg_Unit_2;
2409 end Set_Msg_Insertion_Unit_Name;
2415 procedure Set_Msg_Node (Node : Node_Id) is
2420 if Nkind (Node) = N_Designator then
2421 Set_Msg_Node (Name (Node));
2423 Set_Msg_Node (Identifier (Node));
2426 elsif Nkind (Node) = N_Defining_Program_Unit_Name then
2427 Set_Msg_Node (Name (Node));
2429 Set_Msg_Node (Defining_Identifier (Node));
2432 elsif Nkind (Node) = N_Selected_Component then
2433 Set_Msg_Node (Prefix (Node));
2435 Set_Msg_Node (Selector_Name (Node));
2439 -- The only remaining possibilities are identifiers, defining
2440 -- identifiers, pragmas, and pragma argument associations.
2442 if Nkind (Node) = N_Pragma then
2443 Nam := Pragma_Name (Node);
2445 -- The other cases have Chars fields, and we want to test for possible
2446 -- internal names, which generally represent something gone wrong. An
2447 -- exception is the case of internal type names, where we try to find a
2448 -- reasonable external representation for the external name
2450 elsif Is_Internal_Name (Chars (Node))
2452 ((Is_Entity_Name (Node)
2453 and then Present (Entity (Node))
2454 and then Is_Type (Entity (Node)))
2456 (Nkind (Node) = N_Defining_Identifier and then Is_Type (Node)))
2458 if Nkind (Node) = N_Identifier then
2459 Ent := Entity (Node);
2464 -- If the type is the designated type of an access_to_subprogram,
2465 -- there is no name to provide in the call.
2467 if Ekind (Ent) = E_Subprogram_Type then
2470 Unwind_Internal_Type (Ent);
2474 -- If not internal name, just use name in Chars field
2477 Nam := Chars (Node);
2480 -- At this stage, the name to output is in Nam
2482 Get_Unqualified_Decoded_Name_String (Nam);
2484 -- Remove trailing upper case letters from the name (useful for
2485 -- dealing with some cases of internal names.
2487 while Name_Len > 1 and then Name_Buffer (Name_Len) in 'A' .. 'Z' loop
2488 Name_Len := Name_Len - 1;
2491 -- If we have any of the names from standard that start with the
2492 -- characters "any " (e.g. Any_Type), then kill the message since
2493 -- almost certainly it is a junk cascaded message.
2496 and then Name_Buffer (1 .. 4) = "any "
2498 Kill_Message := True;
2501 -- Now we have to set the proper case. If we have a source location
2502 -- then do a check to see if the name in the source is the same name
2503 -- as the name in the Names table, except for possible differences
2504 -- in case, which is the case when we can copy from the source.
2507 Src_Loc : constant Source_Ptr := Sloc (Error_Msg_Node_1);
2508 Sbuffer : Source_Buffer_Ptr;
2510 Src_Ptr : Source_Ptr;
2516 -- For standard locations, always use mixed case
2518 if Src_Loc <= No_Location
2519 or else Sloc (Node) <= No_Location
2521 Set_Casing (Mixed_Case);
2524 -- Determine if the reference we are dealing with corresponds
2525 -- to text at the point of the error reference. This will often
2526 -- be the case for simple identifier references, and is the case
2527 -- where we can copy the spelling from the source.
2529 Sbuffer := Source_Text (Get_Source_File_Index (Src_Loc));
2531 while Ref_Ptr <= Name_Len loop
2533 Fold_Lower (Sbuffer (Src_Ptr)) /=
2534 Fold_Lower (Name_Buffer (Ref_Ptr));
2535 Ref_Ptr := Ref_Ptr + 1;
2536 Src_Ptr := Src_Ptr + 1;
2539 -- If we get through the loop without a mismatch, then output
2540 -- the name the way it is spelled in the source program
2542 if Ref_Ptr > Name_Len then
2545 for J in 1 .. Name_Len loop
2546 Name_Buffer (J) := Sbuffer (Src_Ptr);
2547 Src_Ptr := Src_Ptr + 1;
2550 -- Otherwise set the casing using the default identifier casing
2553 Set_Casing (Identifier_Casing (Flag_Source), Mixed_Case);
2558 Set_Msg_Name_Buffer;
2566 procedure Set_Msg_Text (Text : String; Flag : Source_Ptr) is
2567 C : Character; -- Current character
2568 P : Natural; -- Current index;
2571 Manual_Quote_Mode := False;
2572 Is_Unconditional_Msg := False;
2574 Flag_Source := Get_Source_File_Index (Flag);
2577 while P <= Text'Last loop
2581 -- Check for insertion character or sequence
2585 if P <= Text'Last and then Text (P) = '%' then
2587 Set_Msg_Insertion_Name_Literal;
2589 Set_Msg_Insertion_Name;
2593 if P <= Text'Last and then Text (P) = '$' then
2595 Set_Msg_Insertion_Unit_Name (Suffix => False);
2598 Set_Msg_Insertion_Unit_Name;
2602 Set_Msg_Insertion_File_Name;
2605 Set_Msg_Insertion_Type_Reference (Flag);
2608 Set_Msg_Insertion_Reserved_Name;
2611 Set_Msg_Insertion_Node;
2614 Set_Msg_Insertion_Line_Number (Error_Msg_Sloc, Flag);
2617 Continuation := True;
2619 if Text (P) = '\' then
2620 Continuation_New_Line := True;
2625 Set_Msg_Insertion_Column;
2628 Set_Msg_Insertion_Run_Time_Name;
2631 Set_Msg_Insertion_Uint;
2634 Manual_Quote_Mode := not Manual_Quote_Mode;
2638 Is_Unconditional_Msg := True;
2641 null; -- already dealt with
2644 null; -- already dealt with
2647 null; -- already dealt with
2650 Set_Msg_Char (Text (P));
2654 Set_Msg_Str (Error_Msg_String (1 .. Error_Msg_Strlen));
2656 -- Upper case letter
2660 -- Start of reserved word if two or more
2662 if P <= Text'Last and then Text (P) in 'A' .. 'Z' then
2664 Set_Msg_Insertion_Reserved_Word (Text, P);
2666 -- Single upper case letter is just inserted
2672 -- Normal character with no special treatment
2686 procedure Set_Posted (N : Node_Id) is
2690 if Is_Serious_Error then
2692 -- We always set Error_Posted on the node itself
2694 Set_Error_Posted (N);
2696 -- If it is a subexpression, then set Error_Posted on parents up to
2697 -- and including the first non-subexpression construct. This helps
2698 -- avoid cascaded error messages within a single expression.
2704 Set_Error_Posted (P);
2705 exit when Nkind (P) not in N_Subexpr;
2708 -- A special check, if we just posted an error on an attribute
2709 -- definition clause, then also set the entity involved as posted.
2710 -- For example, this stops complaining about the alignment after
2711 -- complaining about the size, which is likely to be useless.
2713 if Nkind (P) = N_Attribute_Definition_Clause then
2714 if Is_Entity_Name (Name (P)) then
2715 Set_Error_Posted (Entity (Name (P)));
2721 -----------------------
2722 -- Set_Qualification --
2723 -----------------------
2725 procedure Set_Qualification (N : Nat; E : Entity_Id) is
2727 if N /= 0 and then Scope (E) /= Standard_Standard then
2728 Set_Qualification (N - 1, Scope (E));
2729 Set_Msg_Node (Scope (E));
2732 end Set_Qualification;
2734 ------------------------
2735 -- Special_Msg_Delete --
2736 ------------------------
2738 -- Is it really right to have all this specialized knowledge in errout?
2740 function Special_Msg_Delete
2742 N : Node_Or_Entity_Id;
2743 E : Node_Or_Entity_Id) return Boolean
2746 -- Never delete messages in -gnatdO mode
2748 if Debug_Flag_OO then
2751 -- Processing for "atomic access cannot be guaranteed"
2753 elsif Msg = "atomic access to & cannot be guaranteed" then
2755 -- When an atomic object refers to a non-atomic type in the same
2756 -- scope, we implicitly make the type atomic. In the non-error case
2757 -- this is surely safe (and in fact prevents an error from occurring
2758 -- if the type is not atomic by default). But if the object cannot be
2759 -- made atomic, then we introduce an extra junk message by this
2760 -- manipulation, which we get rid of here.
2762 -- We identify this case by the fact that it references a type for
2763 -- which Is_Atomic is set, but there is no Atomic pragma setting it.
2766 and then Is_Atomic (E)
2767 and then No (Get_Rep_Pragma (E, Name_Atomic))
2772 -- Processing for "Size too small" messages
2774 elsif Msg = "size for& too small, minimum allowed is ^" then
2776 -- Suppress "size too small" errors in CodePeer mode, since pragma
2777 -- Pack is also ignored in this configuration.
2779 if CodePeer_Mode then
2782 -- When a size is wrong for a frozen type there is no explicit size
2783 -- clause, and other errors have occurred, suppress the message,
2784 -- since it is likely that this size error is a cascaded result of
2785 -- other errors. The reason we eliminate unfrozen types is that
2786 -- messages issued before the freeze type are for sure OK.
2789 and then Serious_Errors_Detected > 0
2790 and then Nkind (N) /= N_Component_Clause
2791 and then Nkind (Parent (N)) /= N_Component_Clause
2793 No (Get_Attribute_Definition_Clause (E, Attribute_Size))
2795 No (Get_Attribute_Definition_Clause (E, Attribute_Object_Size))
2797 No (Get_Attribute_Definition_Clause (E, Attribute_Value_Size))
2803 -- All special tests complete, so go ahead with message
2806 end Special_Msg_Delete;
2808 --------------------------
2809 -- Unwind_Internal_Type --
2810 --------------------------
2812 procedure Unwind_Internal_Type (Ent : in out Entity_Id) is
2813 Derived : Boolean := False;
2815 Old_Ent : Entity_Id;
2818 -- Undo placement of a quote, since we will put it back later
2820 Mchar := Msg_Buffer (Msglen);
2823 Msglen := Msglen - 1;
2826 -- The loop here deals with recursive types, we are trying to find a
2827 -- related entity that is not an implicit type. Note that the check with
2828 -- Old_Ent stops us from getting "stuck". Also, we don't output the
2829 -- "type derived from" message more than once in the case where we climb
2830 -- up multiple levels.
2835 -- Implicit access type, use directly designated type In Ada 2005,
2836 -- the designated type may be an anonymous access to subprogram, in
2837 -- which case we can only point to its definition.
2839 if Is_Access_Type (Ent) then
2840 if Ekind (Ent) = E_Access_Subprogram_Type
2841 or else Ekind (Ent) = E_Anonymous_Access_Subprogram_Type
2842 or else Is_Access_Protected_Subprogram_Type (Ent)
2844 Ent := Directly_Designated_Type (Ent);
2846 if not Comes_From_Source (Ent) then
2847 if Buffer_Ends_With ("type ") then
2848 Buffer_Remove ("type ");
2851 Set_Msg_Str ("access to subprogram with profile ");
2853 elsif Ekind (Ent) = E_Function then
2854 Set_Msg_Str ("access to function ");
2856 Set_Msg_Str ("access to procedure ");
2860 -- Type is access to object, named or anonymous
2863 Set_Msg_Str ("access to ");
2864 Ent := Directly_Designated_Type (Ent);
2869 elsif Is_Class_Wide_Type (Ent) then
2871 Ent := Root_Type (Ent);
2873 -- Use base type if this is a subtype
2875 elsif Ent /= Base_Type (Ent) then
2876 Buffer_Remove ("type ");
2878 -- Avoid duplication "subtype of subtype of", and also replace
2879 -- "derived from subtype of" simply by "derived from"
2881 if not Buffer_Ends_With ("subtype of ")
2882 and then not Buffer_Ends_With ("derived from ")
2884 Set_Msg_Str ("subtype of ");
2887 Ent := Base_Type (Ent);
2889 -- If this is a base type with a first named subtype, use the first
2890 -- named subtype instead. This is not quite accurate in all cases,
2891 -- but it makes too much noise to be accurate and add 'Base in all
2892 -- cases. Note that we only do this is the first named subtype is not
2893 -- itself an internal name. This avoids the obvious loop (subtype ->
2894 -- basetype -> subtype) which would otherwise occur!)
2896 elsif Present (Freeze_Node (Ent))
2897 and then Present (First_Subtype_Link (Freeze_Node (Ent)))
2899 not Is_Internal_Name
2900 (Chars (First_Subtype_Link (Freeze_Node (Ent))))
2902 Ent := First_Subtype_Link (Freeze_Node (Ent));
2904 -- Otherwise use root type
2908 Buffer_Remove ("type ");
2910 -- Test for "subtype of type derived from" which seems
2911 -- excessive and is replaced by simply "type derived from"
2913 Buffer_Remove ("subtype of");
2915 -- Avoid duplication "type derived from type derived from"
2917 if not Buffer_Ends_With ("type derived from ") then
2918 Set_Msg_Str ("type derived from ");
2927 -- If we are stuck in a loop, get out and settle for the internal
2928 -- name after all. In this case we set to kill the message if it
2929 -- is not the first error message (we really try hard not to show
2930 -- the dirty laundry of the implementation to the poor user!)
2932 if Ent = Old_Ent then
2933 Kill_Message := True;
2937 -- Get out if we finally found a non-internal name to use
2939 exit when not Is_Internal_Name (Chars (Ent));
2945 end Unwind_Internal_Type;
2951 procedure VMS_Convert is
2961 P := Msg_Buffer'First;
2967 if Msg_Buffer (P) = '-' then
2968 for G in Gnames'Range loop
2969 L := Gnames (G)'Length;
2971 -- See if we have "-ggg switch", where ggg is Gnames entry
2973 if P + L + 7 <= Msglen
2974 and then Msg_Buffer (P + 1 .. P + L) = Gnames (G).all
2975 and then Msg_Buffer (P + L + 1 .. P + L + 7) = " switch"
2977 -- Replace by "/vvv qualifier", where vvv is Vnames entry
2979 N := Vnames (G)'Length;
2980 Msg_Buffer (P + N + 11 .. Msglen + N - L + 3) :=
2981 Msg_Buffer (P + L + 8 .. Msglen);
2982 Msg_Buffer (P) := '/';
2983 Msg_Buffer (P + 1 .. P + N) := Vnames (G).all;
2984 Msg_Buffer (P + N + 1 .. P + N + 10) := " qualifier";
2986 Msglen := Msglen + N - L + 3;