1 ------------------------------------------------------------------------------
3 -- GNAT COMPILER COMPONENTS --
9 -- Copyright (C) 1992-2010, Free Software Foundation, Inc. --
11 -- GNAT is free software; you can redistribute it and/or modify it under --
12 -- terms of the GNU General Public License as published by the Free Soft- --
13 -- ware Foundation; either version 3, or (at your option) any later ver- --
14 -- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
15 -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
16 -- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License --
17 -- for more details. You should have received a copy of the GNU General --
18 -- Public License distributed with GNAT; see file COPYING3. If not, go to --
19 -- http://www.gnu.org/licenses for a complete copy of the license. --
21 -- GNAT was originally developed by the GNAT team at New York University. --
22 -- Extensive contributions were provided by Ada Core Technologies Inc. --
24 ------------------------------------------------------------------------------
26 -- Warning! Error messages can be generated during Gigi processing by direct
27 -- calls to error message routines, so it is essential that the processing
28 -- in this body be consistent with the requirements for the Gigi processing
29 -- environment, and that in particular, no disallowed table expansion is
32 with Atree; use Atree;
33 with Casing; use Casing;
34 with Csets; use Csets;
35 with Debug; use Debug;
36 with Einfo; use Einfo;
37 with Erroutc; use Erroutc;
38 with Fname; use Fname;
39 with Gnatvsn; use Gnatvsn;
40 with Hostparm; use Hostparm;
43 with Nlists; use Nlists;
44 with Output; use Output;
45 with Scans; use Scans;
46 with Sem_Aux; use Sem_Aux;
47 with Sinput; use Sinput;
48 with Sinfo; use Sinfo;
49 with Snames; use Snames;
50 with Stand; use Stand;
51 with Stylesw; use Stylesw;
52 with Uname; use Uname;
54 package body Errout is
56 Errors_Must_Be_Ignored : Boolean := False;
57 -- Set to True by procedure Set_Ignore_Errors (True), when calls to error
58 -- message procedures should be ignored (when parsing irrelevant text in
59 -- sources being preprocessed).
61 Finalize_Called : Boolean := False;
62 -- Set True if the Finalize routine has been called
64 Warn_On_Instance : Boolean;
65 -- Flag set true for warning message to be posted on instance
67 ------------------------------------
68 -- Table of Non-Instance Messages --
69 ------------------------------------
71 -- This table contains an entry for every error message processed by the
72 -- Error_Msg routine that is not posted on generic (or inlined) instance.
73 -- As explained in further detail in the Error_Msg procedure body, this
74 -- table is used to avoid posting redundant messages on instances.
76 type NIM_Record is record
80 -- Type used to store text and location of one message
82 package Non_Instance_Msgs is new Table.Table (
83 Table_Component_Type => NIM_Record,
84 Table_Index_Type => Int,
87 Table_Increment => 100,
88 Table_Name => "Non_Instance_Msgs");
90 -----------------------
91 -- Local Subprograms --
92 -----------------------
94 procedure Error_Msg_Internal
99 -- This is the low level routine used to post messages after dealing with
100 -- the issue of messages placed on instantiations (which get broken up
101 -- into separate calls in Error_Msg). Sptr is the location on which the
102 -- flag will be placed in the output. In the case where the flag is on
103 -- the template, this points directly to the template, not to one of the
104 -- instantiation copies of the template. Optr is the original location
105 -- used to flag the error, and this may indeed point to an instantiation
106 -- copy. So typically we can see Optr pointing to the template location
107 -- in an instantiation copy when Sptr points to the source location of
108 -- the actual instantiation (i.e the line with the new). Msg_Cont is
109 -- set true if this is a continuation message.
111 function No_Warnings (N : Node_Or_Entity_Id) return Boolean;
112 -- Determines if warnings should be suppressed for the given node
114 function OK_Node (N : Node_Id) return Boolean;
115 -- Determines if a node is an OK node to place an error message on (return
116 -- True) or if the error message should be suppressed (return False). A
117 -- message is suppressed if the node already has an error posted on it,
118 -- or if it refers to an Etype that has an error posted on it, or if
119 -- it references an Entity that has an error posted on it.
121 procedure Output_Source_Line
122 (L : Physical_Line_Number;
123 Sfile : Source_File_Index;
125 -- Outputs text of source line L, in file S, together with preceding line
126 -- number, as described above for Output_Line_Number. The Errs parameter
127 -- indicates if there are errors attached to the line, which forces
128 -- listing on, even in the presence of pragma List (Off).
130 procedure Set_Msg_Insertion_Column;
131 -- Handle column number insertion (@ insertion character)
133 procedure Set_Msg_Insertion_Node;
134 -- Handle node (name from node) insertion (& insertion character)
136 procedure Set_Msg_Insertion_Type_Reference (Flag : Source_Ptr);
137 -- Handle type reference (right brace insertion character). Flag is the
138 -- location of the flag, which is provided for the internal call to
139 -- Set_Msg_Insertion_Line_Number,
141 procedure Set_Msg_Insertion_Unit_Name (Suffix : Boolean := True);
142 -- Handle unit name insertion ($ insertion character). Depending on Boolean
143 -- parameter Suffix, (spec) or (body) is appended after the unit name.
145 procedure Set_Msg_Node (Node : Node_Id);
146 -- Add the sequence of characters for the name associated with the
147 -- given node to the current message.
149 procedure Set_Msg_Text (Text : String; Flag : Source_Ptr);
150 -- Add a sequence of characters to the current message. The characters may
151 -- be one of the special insertion characters (see documentation in spec).
152 -- Flag is the location at which the error is to be posted, which is used
153 -- to determine whether or not the # insertion needs a file name. The
154 -- variables Msg_Buffer, Msglen, Is_Style_Msg, Is_Warning_Msg, and
155 -- Is_Unconditional_Msg are set on return.
157 procedure Set_Posted (N : Node_Id);
158 -- Sets the Error_Posted flag on the given node, and all its parents
159 -- that are subexpressions and then on the parent non-subexpression
160 -- construct that contains the original expression (this reduces the
161 -- number of cascaded messages). Note that this call only has an effect
162 -- for a serious error. For a non-serious error, it has no effect.
164 procedure Set_Qualification (N : Nat; E : Entity_Id);
165 -- Outputs up to N levels of qualification for the given entity. For
166 -- example, the entity A.B.C.D will output B.C. if N = 2.
168 function Special_Msg_Delete
170 N : Node_Or_Entity_Id;
171 E : Node_Or_Entity_Id) return Boolean;
172 -- This function is called from Error_Msg_NEL, passing the message Msg,
173 -- node N on which the error is to be posted, and the entity or node E
174 -- to be used for an & insertion in the message if any. The job of this
175 -- procedure is to test for certain cascaded messages that we would like
176 -- to suppress. If the message is to be suppressed then we return True.
177 -- If the message should be generated (the normal case) False is returned.
179 procedure Unwind_Internal_Type (Ent : in out Entity_Id);
180 -- This procedure is given an entity id for an internal type, i.e. a type
181 -- with an internal name. It unwinds the type to try to get to something
182 -- reasonably printable, generating prefixes like "subtype of", "access
183 -- to", etc along the way in the buffer. The value in Ent on return is the
184 -- final name to be printed. Hopefully this is not an internal name, but in
185 -- some internal name cases, it is an internal name, and has to be printed
186 -- anyway (although in this case the message has been killed if possible).
187 -- The global variable Class_Flag is set to True if the resulting entity
188 -- should have 'Class appended to its name (see Add_Class procedure), and
189 -- is otherwise unchanged.
191 procedure VMS_Convert;
192 -- This procedure has no effect if called when the host is not OpenVMS. If
193 -- the host is indeed OpenVMS, then the error message stored in Msg_Buffer
194 -- is scanned for appearances of switch names which need converting to
195 -- corresponding VMS qualifier names. See Gnames/Vnames table in Errout
196 -- spec for precise definition of the conversion that is performed by this
197 -- routine in OpenVMS mode.
199 -----------------------
200 -- Change_Error_Text --
201 -----------------------
203 procedure Change_Error_Text (Error_Id : Error_Msg_Id; New_Msg : String) is
204 Save_Next : Error_Msg_Id;
205 Err_Id : Error_Msg_Id := Error_Id;
208 Set_Msg_Text (New_Msg, Errors.Table (Error_Id).Sptr);
209 Errors.Table (Error_Id).Text := new String'(Msg_Buffer (1 .. Msglen));
211 -- If in immediate error message mode, output modified error message now
212 -- This is just a bit tricky, because we want to output just a single
213 -- message, and the messages we modified is already linked in. We solve
214 -- this by temporarily resetting its forward pointer to empty.
216 if Debug_Flag_OO then
217 Save_Next := Errors.Table (Error_Id).Next;
218 Errors.Table (Error_Id).Next := No_Error_Msg;
221 (Errors.Table (Error_Id).Line, Errors.Table (Error_Id).Sfile, True);
222 Output_Error_Msgs (Err_Id);
223 Errors.Table (Error_Id).Next := Save_Next;
225 end Change_Error_Text;
227 ------------------------
228 -- Compilation_Errors --
229 ------------------------
231 function Compilation_Errors return Boolean is
233 if not Finalize_Called then
236 return Erroutc.Compilation_Errors;
238 end Compilation_Errors;
244 -- Error_Msg posts a flag at the given location, except that if the
245 -- Flag_Location points within a generic template and corresponds to an
246 -- instantiation of this generic template, then the actual message will be
247 -- posted on the generic instantiation, along with additional messages
248 -- referencing the generic declaration.
250 procedure Error_Msg (Msg : String; Flag_Location : Source_Ptr) is
251 Sindex : Source_File_Index;
252 -- Source index for flag location
254 Orig_Loc : Source_Ptr;
255 -- Original location of Flag_Location (i.e. location in original
256 -- template in instantiation case, otherwise unchanged).
259 -- It is a fatal error to issue an error message when scanning from the
260 -- internal source buffer (see Sinput for further documentation)
262 pragma Assert (Sinput.Source /= Internal_Source_Ptr);
264 -- Return if all errors are to be ignored
266 if Errors_Must_Be_Ignored then
270 -- If we already have messages, and we are trying to place a message at
271 -- No_Location or in package Standard, then just ignore the attempt
272 -- since we assume that what is happening is some cascaded junk. Note
273 -- that this is safe in the sense that proceeding will surely bomb.
275 if Flag_Location < First_Source_Ptr
276 and then Total_Errors_Detected > 0
281 -- Start of processing for new message
283 Sindex := Get_Source_File_Index (Flag_Location);
284 Test_Style_Warning_Serious_Msg (Msg);
285 Orig_Loc := Original_Location (Flag_Location);
287 -- If the current location is in an instantiation, the issue arises of
288 -- whether to post the message on the template or the instantiation.
290 -- The way we decide is to see if we have posted the same message on
291 -- the template when we compiled the template (the template is always
292 -- compiled before any instantiations). For this purpose, we use a
293 -- separate table of messages. The reason we do this is twofold:
295 -- First, the messages can get changed by various processing
296 -- including the insertion of tokens etc, making it hard to
297 -- do the comparison.
299 -- Second, we will suppress a warning on a template if it is not in
300 -- the current extended source unit. That's reasonable and means we
301 -- don't want the warning on the instantiation here either, but it
302 -- does mean that the main error table would not in any case include
305 if Flag_Location = Orig_Loc then
306 Non_Instance_Msgs.Append ((new String'(Msg), Flag_Location));
307 Warn_On_Instance := False;
309 -- Here we have an instance message
312 -- Delete if debug flag off, and this message duplicates a message
313 -- already posted on the corresponding template
315 if not Debug_Flag_GG then
316 for J in Non_Instance_Msgs.First .. Non_Instance_Msgs.Last loop
317 if Msg = Non_Instance_Msgs.Table (J).Msg.all
318 and then Non_Instance_Msgs.Table (J).Loc = Orig_Loc
325 -- No duplicate, so error/warning will be posted on instance
327 Warn_On_Instance := Is_Warning_Msg;
330 -- Ignore warning message that is suppressed for this location. Note
331 -- that style checks are not considered warning messages for this
334 if Is_Warning_Msg and then Warnings_Suppressed (Orig_Loc) then
337 -- For style messages, check too many messages so far
340 and then Maximum_Messages /= 0
341 and then Warnings_Detected >= Maximum_Messages
346 -- The idea at this stage is that we have two kinds of messages
348 -- First, we have those messages that are to be placed as requested at
349 -- Flag_Location. This includes messages that have nothing to do with
350 -- generics, and also messages placed on generic templates that reflect
351 -- an error in the template itself. For such messages we simply call
352 -- Error_Msg_Internal to place the message in the requested location.
354 if Instantiation (Sindex) = No_Location then
355 Error_Msg_Internal (Msg, Flag_Location, Flag_Location, False);
359 -- If we are trying to flag an error in an instantiation, we may have
360 -- a generic contract violation. What we generate in this case is:
362 -- instantiation error at ...
363 -- original error message
367 -- warning: in instantiation at
368 -- warning: original warning message
370 -- All these messages are posted at the location of the top level
371 -- instantiation. If there are nested instantiations, then the
372 -- instantiation error message can be repeated, pointing to each
373 -- of the relevant instantiations.
375 -- Note: the instantiation mechanism is also shared for inlining of
376 -- subprogram bodies when front end inlining is done. In this case the
377 -- messages have the form:
379 -- in inlined body at ...
380 -- original error message
384 -- warning: in inlined body at
385 -- warning: original warning message
387 -- OK, here we have an instantiation error, and we need to generate the
388 -- error on the instantiation, rather than on the template.
391 Actual_Error_Loc : Source_Ptr;
392 -- Location of outer level instantiation in instantiation case, or
393 -- just a copy of Flag_Location in the normal case. This is the
394 -- location where all error messages will actually be posted.
396 Save_Error_Msg_Sloc : constant Source_Ptr := Error_Msg_Sloc;
397 -- Save possible location set for caller's message. We need to use
398 -- Error_Msg_Sloc for the location of the instantiation error but we
399 -- have to preserve a possible original value.
401 X : Source_File_Index;
403 Msg_Cont_Status : Boolean;
404 -- Used to label continuation lines in instantiation case with
405 -- proper Msg_Cont status.
408 -- Loop to find highest level instantiation, where all error
409 -- messages will be placed.
413 Actual_Error_Loc := Instantiation (X);
414 X := Get_Source_File_Index (Actual_Error_Loc);
415 exit when Instantiation (X) = No_Location;
418 -- Since we are generating the messages at the instantiation point in
419 -- any case, we do not want the references to the bad lines in the
420 -- instance to be annotated with the location of the instantiation.
422 Suppress_Instance_Location := True;
423 Msg_Cont_Status := False;
425 -- Loop to generate instantiation messages
427 Error_Msg_Sloc := Flag_Location;
428 X := Get_Source_File_Index (Flag_Location);
430 while Instantiation (X) /= No_Location loop
432 -- Suppress instantiation message on continuation lines
434 if Msg (Msg'First) /= '\' then
436 -- Case of inlined body
438 if Inlined_Body (X) then
439 if Is_Warning_Msg or else Is_Style_Msg then
441 ("?in inlined body #",
442 Actual_Error_Loc, Flag_Location, Msg_Cont_Status);
446 ("error in inlined body #",
447 Actual_Error_Loc, Flag_Location, Msg_Cont_Status);
450 -- Case of generic instantiation
453 if Is_Warning_Msg or else Is_Style_Msg then
455 ("?in instantiation #",
456 Actual_Error_Loc, Flag_Location, Msg_Cont_Status);
460 ("instantiation error #",
461 Actual_Error_Loc, Flag_Location, Msg_Cont_Status);
466 Error_Msg_Sloc := Instantiation (X);
467 X := Get_Source_File_Index (Error_Msg_Sloc);
468 Msg_Cont_Status := True;
471 Suppress_Instance_Location := False;
472 Error_Msg_Sloc := Save_Error_Msg_Sloc;
474 -- Here we output the original message on the outer instantiation
477 (Msg, Actual_Error_Loc, Flag_Location, Msg_Cont_Status);
485 procedure Error_Msg_AP (Msg : String) is
490 -- If we had saved the Scan_Ptr value after scanning the previous
491 -- token, then we would have exactly the right place for putting
492 -- the flag immediately at hand. However, that would add at least
493 -- two instructions to a Scan call *just* to service the possibility
494 -- of an Error_Msg_AP call. So instead we reconstruct that value.
496 -- We have two possibilities, start with Prev_Token_Ptr and skip over
497 -- the current token, which is made harder by the possibility that this
498 -- token may be in error, or start with Token_Ptr and work backwards.
499 -- We used to take the second approach, but it's hard because of
500 -- comments, and harder still because things that look like comments
501 -- can appear inside strings. So now we take the first approach.
503 -- Note: in the case where there is no previous token, Prev_Token_Ptr
504 -- is set to Source_First, which is a reasonable position for the
505 -- error flag in this situation.
507 S1 := Prev_Token_Ptr;
510 -- If the previous token is a string literal, we need a special approach
511 -- since there may be white space inside the literal and we don't want
512 -- to stop on that white space.
514 -- Note: since this is an error recovery issue anyway, it is not worth
515 -- worrying about special UTF_32 line terminator characters here.
517 if Prev_Token = Tok_String_Literal then
521 if Source (S1) = C then
523 exit when Source (S1) /= C;
524 elsif Source (S1) in Line_Terminator then
529 -- Character literal also needs special handling
531 elsif Prev_Token = Tok_Char_Literal then
534 -- Otherwise we search forward for the end of the current token, marked
535 -- by a line terminator, white space, a comment symbol or if we bump
536 -- into the following token (i.e. the current token).
538 -- Again, it is not worth worrying about UTF_32 special line terminator
539 -- characters in this context, since this is only for error recovery.
542 while Source (S1) not in Line_Terminator
543 and then Source (S1) /= ' '
544 and then Source (S1) /= ASCII.HT
545 and then (Source (S1) /= '-' or else Source (S1 + 1) /= '-')
546 and then S1 /= Token_Ptr
552 -- S1 is now set to the location for the flag
561 procedure Error_Msg_BC (Msg : String) is
563 -- If we are at end of file, post the flag after the previous token
565 if Token = Tok_EOF then
568 -- If we are at start of file, post the flag at the current token
570 elsif Token_Ptr = Source_First (Current_Source_File) then
573 -- If the character before the current token is a space or a horizontal
574 -- tab, then we place the flag on this character (in the case of a tab
575 -- we would really like to place it in the "last" character of the tab
576 -- space, but that it too much trouble to worry about).
578 elsif Source (Token_Ptr - 1) = ' '
579 or else Source (Token_Ptr - 1) = ASCII.HT
581 Error_Msg (Msg, Token_Ptr - 1);
583 -- If there is no space or tab before the current token, then there is
584 -- no room to place the flag before the token, so we place it on the
585 -- token instead (this happens for example at the start of a line).
588 Error_Msg (Msg, Token_Ptr);
596 procedure Error_Msg_CRT (Feature : String; N : Node_Id) is
597 CNRT : constant String := " not allowed in no run time mode";
598 CCRT : constant String := " not supported by configuration>";
600 S : String (1 .. Feature'Length + 1 + CCRT'Length);
605 S (2 .. Feature'Length + 1) := Feature;
606 L := Feature'Length + 2;
608 if No_Run_Time_Mode then
609 S (L .. L + CNRT'Length - 1) := CNRT;
610 L := L + CNRT'Length - 1;
612 else pragma Assert (Configurable_Run_Time_Mode);
613 S (L .. L + CCRT'Length - 1) := CCRT;
614 L := L + CCRT'Length - 1;
617 Error_Msg_N (S (1 .. L), N);
618 Configurable_Run_Time_Violations := Configurable_Run_Time_Violations + 1;
625 procedure Error_Msg_F (Msg : String; N : Node_Id) is
627 Error_Msg_NEL (Msg, N, N, Sloc (First_Node (N)));
634 procedure Error_Msg_FE
637 E : Node_Or_Entity_Id)
640 Error_Msg_NEL (Msg, N, E, Sloc (First_Node (N)));
643 ------------------------
644 -- Error_Msg_Internal --
645 ------------------------
647 procedure Error_Msg_Internal
653 Next_Msg : Error_Msg_Id;
654 -- Pointer to next message at insertion point
656 Prev_Msg : Error_Msg_Id;
657 -- Pointer to previous message at insertion point
659 Temp_Msg : Error_Msg_Id;
661 procedure Handle_Serious_Error;
662 -- Internal procedure to do all error message handling for a serious
663 -- error message, other than bumping the error counts and arranging
664 -- for the message to be output.
666 --------------------------
667 -- Handle_Serious_Error --
668 --------------------------
670 procedure Handle_Serious_Error is
672 -- Turn off code generation if not done already
674 if Operating_Mode = Generate_Code then
675 Operating_Mode := Check_Semantics;
676 Expander_Active := False;
679 -- Set the fatal error flag in the unit table unless we are in
680 -- Try_Semantics mode. This stops the semantics from being performed
681 -- if we find a serious error. This is skipped if we are currently
682 -- dealing with the configuration pragma file.
684 if not Try_Semantics and then Current_Source_Unit /= No_Unit then
685 Set_Fatal_Error (Get_Source_Unit (Sptr));
687 end Handle_Serious_Error;
689 -- Start of processing for Error_Msg_Internal
692 if Raise_Exception_On_Error /= 0 then
693 raise Error_Msg_Exception;
696 Continuation := Msg_Cont;
697 Continuation_New_Line := False;
698 Suppress_Message := False;
699 Kill_Message := False;
700 Set_Msg_Text (Msg, Sptr);
702 -- Kill continuation if parent message killed
704 if Continuation and Last_Killed then
708 -- Return without doing anything if message is suppressed
711 and then not All_Errors_Mode
712 and then not Is_Warning_Msg
713 and then Msg (Msg'Last) /= '!'
715 if not Continuation then
722 -- Return without doing anything if message is killed and this is not
723 -- the first error message. The philosophy is that if we get a weird
724 -- error message and we already have had a message, then we hope the
725 -- weird message is a junk cascaded message
728 and then not All_Errors_Mode
729 and then Total_Errors_Detected /= 0
731 if not Continuation then
738 -- Special check for warning message to see if it should be output
740 if Is_Warning_Msg then
742 -- Immediate return if warning message and warnings are suppressed
744 if Warnings_Suppressed (Optr) or else Warnings_Suppressed (Sptr) then
745 Cur_Msg := No_Error_Msg;
749 -- If the flag location is in the main extended source unit then for
750 -- sure we want the warning since it definitely belongs
752 if In_Extended_Main_Source_Unit (Sptr) then
755 -- If the flag location is not in the main extended source unit, then
756 -- we want to eliminate the warning, unless it is in the extended
757 -- main code unit and we want warnings on the instance.
759 elsif In_Extended_Main_Code_Unit (Sptr) and then Warn_On_Instance then
762 -- Keep warning if debug flag G set
764 elsif Debug_Flag_GG then
767 -- Keep warning if message text ends in !!
769 elsif Msg (Msg'Last) = '!' and then Msg (Msg'Last - 1) = '!' then
772 -- Here is where we delete a warning from a with'ed unit
775 Cur_Msg := No_Error_Msg;
777 if not Continuation then
785 -- If message is to be ignored in special ignore message mode, this is
786 -- where we do this special processing, bypassing message output.
788 if Ignore_Errors_Enable > 0 then
789 if Is_Serious_Error then
790 Handle_Serious_Error;
796 -- If error message line length set, and this is a continuation message
797 -- then all we do is to append the text to the text of the last message
798 -- with a comma space separator (eliminating a possible (style) or
801 if Error_Msg_Line_Length /= 0
802 and then Continuation
804 Cur_Msg := Errors.Last;
807 Oldm : String_Ptr := Errors.Table (Cur_Msg).Text;
808 Newm : String (1 .. Oldm'Last + 2 + Msglen);
813 -- First copy old message to new one and free it
815 Newm (Oldm'Range) := Oldm.all;
819 -- Remove (style) or info: at start of message
821 if Msglen > 8 and then Msg_Buffer (1 .. 8) = "(style) " then
824 elsif Msglen > 6 and then Msg_Buffer (1 .. 6) = "info: " then
831 -- Now deal with separation between messages. Normally this is
832 -- simply comma space, but there are some special cases.
834 -- If continuation new line, then put actual NL character in msg
836 if Continuation_New_Line then
838 Newm (Newl) := ASCII.LF;
840 -- If continuation message is enclosed in parentheses, then
841 -- special treatment (don't need a comma, and we want to combine
842 -- successive parenthetical remarks into a single one with
843 -- separating commas).
845 elsif Msg_Buffer (M) = '(' and then Msg_Buffer (Msglen) = ')' then
847 -- Case where existing message ends in right paren, remove
848 -- and separate parenthetical remarks with a comma.
850 if Newm (Newl) = ')' then
852 Msg_Buffer (M) := ' ';
854 -- Case where we are adding new parenthetical comment
861 -- Case where continuation not in parens and no new line
864 Newm (Newl + 1 .. Newl + 2) := ", ";
868 -- Append new message
870 Newm (Newl + 1 .. Newl + Msglen - M + 1) :=
871 Msg_Buffer (M .. Msglen);
872 Newl := Newl + Msglen - M + 1;
873 Errors.Table (Cur_Msg).Text := new String'(Newm (1 .. Newl));
879 -- Otherwise build error message object for new message
882 ((Text => new String'(Msg_Buffer (1 .. Msglen)),
883 Next => No_Error_Msg,
886 Sfile => Get_Source_File_Index (Sptr),
887 Line => Get_Physical_Line_Number (Sptr),
888 Col => Get_Column_Number (Sptr),
889 Warn => Is_Warning_Msg,
890 Style => Is_Style_Msg,
891 Serious => Is_Serious_Error,
892 Uncond => Is_Unconditional_Msg,
893 Msg_Cont => Continuation,
895 Cur_Msg := Errors.Last;
897 -- If immediate errors mode set, output error message now. Also output
898 -- now if the -d1 debug flag is set (so node number message comes out
899 -- just before actual error message)
901 if Debug_Flag_OO or else Debug_Flag_1 then
904 (Errors.Table (Cur_Msg).Line, Errors.Table (Cur_Msg).Sfile, True);
906 Output_Error_Msgs (Temp_Msg);
908 -- If not in immediate errors mode, then we insert the message in the
909 -- error chain for later output by Finalize. The messages are sorted
910 -- first by unit (main unit comes first), and within a unit by source
911 -- location (earlier flag location first in the chain).
914 -- First a quick check, does this belong at the very end of the chain
915 -- of error messages. This saves a lot of time in the normal case if
916 -- there are lots of messages.
918 if Last_Error_Msg /= No_Error_Msg
919 and then Errors.Table (Cur_Msg).Sfile =
920 Errors.Table (Last_Error_Msg).Sfile
921 and then (Sptr > Errors.Table (Last_Error_Msg).Sptr
923 (Sptr = Errors.Table (Last_Error_Msg).Sptr
925 Optr > Errors.Table (Last_Error_Msg).Optr))
927 Prev_Msg := Last_Error_Msg;
928 Next_Msg := No_Error_Msg;
930 -- Otherwise do a full sequential search for the insertion point
933 Prev_Msg := No_Error_Msg;
934 Next_Msg := First_Error_Msg;
935 while Next_Msg /= No_Error_Msg loop
937 Errors.Table (Cur_Msg).Sfile < Errors.Table (Next_Msg).Sfile;
939 if Errors.Table (Cur_Msg).Sfile =
940 Errors.Table (Next_Msg).Sfile
942 exit when Sptr < Errors.Table (Next_Msg).Sptr
944 (Sptr = Errors.Table (Next_Msg).Sptr
946 Optr < Errors.Table (Next_Msg).Optr);
949 Prev_Msg := Next_Msg;
950 Next_Msg := Errors.Table (Next_Msg).Next;
954 -- Now we insert the new message in the error chain. The insertion
955 -- point for the message is after Prev_Msg and before Next_Msg.
957 -- The possible insertion point for the new message is after Prev_Msg
958 -- and before Next_Msg. However, this is where we do a special check
959 -- for redundant parsing messages, defined as messages posted on the
960 -- same line. The idea here is that probably such messages are junk
961 -- from the parser recovering. In full errors mode, we don't do this
962 -- deletion, but otherwise such messages are discarded at this stage.
964 if Prev_Msg /= No_Error_Msg
965 and then Errors.Table (Prev_Msg).Line =
966 Errors.Table (Cur_Msg).Line
967 and then Errors.Table (Prev_Msg).Sfile =
968 Errors.Table (Cur_Msg).Sfile
969 and then Compiler_State = Parsing
970 and then not All_Errors_Mode
972 -- Don't delete unconditional messages and at this stage, don't
973 -- delete continuation lines (we attempted to delete those earlier
974 -- if the parent message was deleted.
976 if not Errors.Table (Cur_Msg).Uncond
977 and then not Continuation
979 -- Don't delete if prev msg is warning and new msg is an error.
980 -- This is because we don't want a real error masked by a
981 -- warning. In all other cases (that is parse errors for the
982 -- same line that are not unconditional) we do delete the
983 -- message. This helps to avoid junk extra messages from
984 -- cascaded parsing errors
986 if not (Errors.Table (Prev_Msg).Warn
988 Errors.Table (Prev_Msg).Style)
990 (Errors.Table (Cur_Msg).Warn
992 Errors.Table (Cur_Msg).Style)
994 -- All tests passed, delete the message by simply returning
995 -- without any further processing.
997 if not Continuation then
1006 -- Come here if message is to be inserted in the error chain
1008 if not Continuation then
1009 Last_Killed := False;
1012 if Prev_Msg = No_Error_Msg then
1013 First_Error_Msg := Cur_Msg;
1015 Errors.Table (Prev_Msg).Next := Cur_Msg;
1018 Errors.Table (Cur_Msg).Next := Next_Msg;
1020 if Next_Msg = No_Error_Msg then
1021 Last_Error_Msg := Cur_Msg;
1025 -- Bump appropriate statistics count
1027 if Errors.Table (Cur_Msg).Warn or else Errors.Table (Cur_Msg).Style then
1028 Warnings_Detected := Warnings_Detected + 1;
1031 Total_Errors_Detected := Total_Errors_Detected + 1;
1033 if Errors.Table (Cur_Msg).Serious then
1034 Serious_Errors_Detected := Serious_Errors_Detected + 1;
1035 Handle_Serious_Error;
1039 -- If too many warnings turn off warnings
1041 if Maximum_Messages /= 0 then
1042 if Warnings_Detected = Maximum_Messages then
1043 Warning_Mode := Suppress;
1046 -- If too many errors abandon compilation
1048 if Total_Errors_Detected = Maximum_Messages then
1049 raise Unrecoverable_Error;
1052 end Error_Msg_Internal;
1058 procedure Error_Msg_N (Msg : String; N : Node_Or_Entity_Id) is
1060 Error_Msg_NEL (Msg, N, N, Sloc (N));
1067 procedure Error_Msg_NE
1069 N : Node_Or_Entity_Id;
1070 E : Node_Or_Entity_Id)
1073 Error_Msg_NEL (Msg, N, E, Sloc (N));
1080 procedure Error_Msg_NEL
1082 N : Node_Or_Entity_Id;
1083 E : Node_Or_Entity_Id;
1084 Flag_Location : Source_Ptr)
1087 if Special_Msg_Delete (Msg, N, E) then
1091 Test_Style_Warning_Serious_Msg (Msg);
1093 -- Special handling for warning messages
1095 if Is_Warning_Msg then
1097 -- Suppress if no warnings set for either entity or node
1099 if No_Warnings (N) or else No_Warnings (E) then
1101 -- Disable any continuation messages as well
1103 Last_Killed := True;
1107 -- Suppress if inside loop that is known to be null or is probably
1108 -- null (case where loop executes only if invalid values present).
1109 -- In either case warnings in the loop are likely to be junk.
1116 while Present (P) loop
1117 if Nkind (P) = N_Loop_Statement
1118 and then Suppress_Loop_Warnings (P)
1128 -- Test for message to be output
1131 or else Msg (Msg'Last) = '!'
1132 or else Is_Warning_Msg
1134 or else (Msg (Msg'First) = '\' and then not Last_Killed)
1137 Error_Msg_Node_1 := E;
1138 Error_Msg (Msg, Flag_Location);
1141 Last_Killed := True;
1144 if not (Is_Warning_Msg or Is_Style_Msg) then
1153 procedure Error_Msg_NW
1156 N : Node_Or_Entity_Id)
1160 and then In_Extended_Main_Source_Unit (N)
1161 and then Comes_From_Source (N)
1163 Error_Msg_NEL (Msg, N, N, Sloc (N));
1171 procedure Error_Msg_S (Msg : String) is
1173 Error_Msg (Msg, Scan_Ptr);
1180 procedure Error_Msg_SC (Msg : String) is
1182 -- If we are at end of file, post the flag after the previous token
1184 if Token = Tok_EOF then
1187 -- For all other cases the message is posted at the current token
1191 Error_Msg (Msg, Token_Ptr);
1199 procedure Error_Msg_SP (Msg : String) is
1201 -- Note: in the case where there is no previous token, Prev_Token_Ptr
1202 -- is set to Source_First, which is a reasonable position for the
1203 -- error flag in this situation
1205 Error_Msg (Msg, Prev_Token_Ptr);
1212 procedure Finalize (Last_Call : Boolean) is
1218 -- Eliminate any duplicated error messages from the list. This is
1219 -- done after the fact to avoid problems with Change_Error_Text.
1221 Cur := First_Error_Msg;
1222 while Cur /= No_Error_Msg loop
1223 Nxt := Errors.Table (Cur).Next;
1226 while F /= No_Error_Msg
1227 and then Errors.Table (F).Sptr = Errors.Table (Cur).Sptr
1229 Check_Duplicate_Message (Cur, F);
1230 F := Errors.Table (F).Next;
1236 -- Mark any messages suppressed by specific warnings as Deleted
1238 Cur := First_Error_Msg;
1239 while Cur /= No_Error_Msg loop
1240 if not Errors.Table (Cur).Deleted
1241 and then Warning_Specifically_Suppressed
1242 (Errors.Table (Cur).Sptr,
1243 Errors.Table (Cur).Text)
1245 Errors.Table (Cur).Deleted := True;
1246 Warnings_Detected := Warnings_Detected - 1;
1249 Cur := Errors.Table (Cur).Next;
1252 Finalize_Called := True;
1254 -- Check consistency of specific warnings (may add warnings). We only
1255 -- do this on the last call, after all possible warnings are posted.
1258 Validate_Specific_Warnings (Error_Msg'Access);
1266 function First_Node (C : Node_Id) return Node_Id is
1267 L : constant Source_Ptr := Sloc (Original_Node (C));
1268 Sfile : constant Source_File_Index := Get_Source_File_Index (L);
1272 function Test_Earlier (N : Node_Id) return Traverse_Result;
1273 -- Function applied to every node in the construct
1275 procedure Search_Tree_First is new Traverse_Proc (Test_Earlier);
1276 -- Create traversal procedure
1282 function Test_Earlier (N : Node_Id) return Traverse_Result is
1283 Loc : constant Source_Ptr := Sloc (Original_Node (N));
1286 -- Check for earlier. The tests for being in the same file ensures
1287 -- against strange cases of foreign code somehow being present. We
1288 -- don't want wild placement of messages if that happens, so it is
1289 -- best to just ignore this situation.
1292 and then Get_Source_File_Index (Loc) = Sfile
1294 Earliest := Original_Node (N);
1301 -- Start of processing for First_Node
1304 Earliest := Original_Node (C);
1305 Eloc := Sloc (Earliest);
1306 Search_Tree_First (Original_Node (C));
1314 function First_Sloc (N : Node_Id) return Source_Ptr is
1315 SI : constant Source_File_Index := Source_Index (Get_Source_Unit (N));
1316 SF : constant Source_Ptr := Source_First (SI);
1321 F := First_Node (N);
1324 -- The following circuit is a bit subtle. When we have parenthesized
1325 -- expressions, then the Sloc will not record the location of the paren,
1326 -- but we would like to post the flag on the paren. So what we do is to
1327 -- crawl up the tree from the First_Node, adjusting the Sloc value for
1328 -- any parentheses we know are present. Yes, we know this circuit is not
1329 -- 100% reliable (e.g. because we don't record all possible paren level
1330 -- values), but this is only for an error message so it is good enough.
1333 Paren_Loop : for J in 1 .. Paren_Count (F) loop
1335 -- We don't look more than 12 characters behind the current
1336 -- location, and in any case not past the front of the source.
1338 Search_Loop : for K in 1 .. 12 loop
1339 exit Search_Loop when S = SF;
1341 if Source_Text (SI) (S - 1) = '(' then
1345 elsif Source_Text (SI) (S - 1) <= ' ' then
1351 end loop Search_Loop;
1352 end loop Paren_Loop;
1354 exit Node_Loop when F = N;
1356 exit Node_Loop when Nkind (F) not in N_Subexpr;
1366 procedure Initialize is
1369 First_Error_Msg := No_Error_Msg;
1370 Last_Error_Msg := No_Error_Msg;
1371 Serious_Errors_Detected := 0;
1372 Total_Errors_Detected := 0;
1373 Warnings_Detected := 0;
1374 Cur_Msg := No_Error_Msg;
1377 -- Initialize warnings table, if all warnings are suppressed, supply an
1378 -- initial dummy entry covering all possible source locations.
1381 Specific_Warnings.Init;
1383 if Warning_Mode = Suppress then
1385 ((Start => Source_Ptr'First, Stop => Source_Ptr'Last));
1393 function No_Warnings (N : Node_Or_Entity_Id) return Boolean is
1395 if Error_Posted (N) then
1398 elsif Nkind (N) in N_Entity and then Has_Warnings_Off (N) then
1401 elsif Is_Entity_Name (N)
1402 and then Present (Entity (N))
1403 and then Has_Warnings_Off (Entity (N))
1416 function OK_Node (N : Node_Id) return Boolean is
1417 K : constant Node_Kind := Nkind (N);
1420 if Error_Posted (N) then
1423 elsif K in N_Has_Etype
1424 and then Present (Etype (N))
1425 and then Error_Posted (Etype (N))
1430 or else K = N_Attribute_Reference
1431 or else K = N_Character_Literal
1432 or else K = N_Expanded_Name
1433 or else K = N_Identifier
1434 or else K = N_Operator_Symbol)
1435 and then Present (Entity (N))
1436 and then Error_Posted (Entity (N))
1444 ---------------------
1445 -- Output_Messages --
1446 ---------------------
1448 procedure Output_Messages is
1452 procedure Write_Error_Summary;
1453 -- Write error summary
1455 procedure Write_Header (Sfile : Source_File_Index);
1456 -- Write header line (compiling or checking given file)
1458 procedure Write_Max_Errors;
1459 -- Write message if max errors reached
1461 -------------------------
1462 -- Write_Error_Summary --
1463 -------------------------
1465 procedure Write_Error_Summary is
1467 -- Extra blank line if error messages or source listing were output
1469 if Total_Errors_Detected + Warnings_Detected > 0
1475 -- Message giving number of lines read and number of errors detected.
1476 -- This normally goes to Standard_Output. The exception is when brief
1477 -- mode is not set, verbose mode (or full list mode) is set, and
1478 -- there are errors. In this case we send the message to standard
1479 -- error to make sure that *something* appears on standard error in
1480 -- an error situation.
1482 -- Formerly, only the "# errors" suffix was sent to stderr, whereas
1483 -- "# lines:" appeared on stdout. This caused problems on VMS when
1484 -- the stdout buffer was flushed, giving an extra line feed after
1487 if Total_Errors_Detected + Warnings_Detected /= 0
1488 and then not Brief_Output
1489 and then (Verbose_Mode or Full_List)
1494 -- Message giving total number of lines
1497 Write_Int (Num_Source_Lines (Main_Source_File));
1499 if Num_Source_Lines (Main_Source_File) = 1 then
1500 Write_Str (" line: ");
1502 Write_Str (" lines: ");
1505 if Total_Errors_Detected = 0 then
1506 Write_Str ("No errors");
1508 elsif Total_Errors_Detected = 1 then
1509 Write_Str ("1 error");
1512 Write_Int (Total_Errors_Detected);
1513 Write_Str (" errors");
1516 if Warnings_Detected /= 0 then
1518 Write_Int (Warnings_Detected);
1519 Write_Str (" warning");
1521 if Warnings_Detected /= 1 then
1525 if Warning_Mode = Treat_As_Error then
1526 Write_Str (" (treated as error");
1528 if Warnings_Detected /= 1 then
1537 Set_Standard_Output;
1538 end Write_Error_Summary;
1544 procedure Write_Header (Sfile : Source_File_Index) is
1546 if Verbose_Mode or Full_List then
1547 if Original_Operating_Mode = Generate_Code then
1548 Write_Str ("Compiling: ");
1550 Write_Str ("Checking: ");
1553 Write_Name (Full_File_Name (Sfile));
1555 if not Debug_Flag_7 then
1556 Write_Str (" (source file time stamp: ");
1557 Write_Time_Stamp (Sfile);
1565 ----------------------
1566 -- Write_Max_Errors --
1567 ----------------------
1569 procedure Write_Max_Errors is
1571 if Maximum_Messages /= 0 then
1572 if Warnings_Detected >= Maximum_Messages then
1574 Write_Line ("maximum number of warnings output");
1575 Write_Line ("any further warnings suppressed");
1576 Set_Standard_Output;
1579 -- If too many errors print message
1581 if Total_Errors_Detected >= Maximum_Messages then
1583 Write_Line ("fatal error: maximum number of errors detected");
1584 Set_Standard_Output;
1587 end Write_Max_Errors;
1589 -- Start of processing for Output_Messages
1592 -- Error if Finalize has not been called
1594 if not Finalize_Called then
1595 raise Program_Error;
1598 -- Reset current error source file if the main unit has a pragma
1599 -- Source_Reference. This ensures outputting the proper name of
1600 -- the source file in this situation.
1602 if Main_Source_File = No_Source_File
1603 or else Num_SRef_Pragmas (Main_Source_File) /= 0
1605 Current_Error_Source_File := No_Source_File;
1610 if Brief_Output or (not Full_List and not Verbose_Mode) then
1613 E := First_Error_Msg;
1614 while E /= No_Error_Msg loop
1615 if not Errors.Table (E).Deleted and then not Debug_Flag_KK then
1616 if Full_Path_Name_For_Brief_Errors then
1617 Write_Name (Full_Ref_Name (Errors.Table (E).Sfile));
1619 Write_Name (Reference_Name (Errors.Table (E).Sfile));
1623 Write_Int (Int (Physical_To_Logical
1624 (Errors.Table (E).Line,
1625 Errors.Table (E).Sfile)));
1628 if Errors.Table (E).Col < 10 then
1632 Write_Int (Int (Errors.Table (E).Col));
1634 Output_Msg_Text (E);
1638 E := Errors.Table (E).Next;
1641 Set_Standard_Output;
1644 -- Full source listing case
1647 List_Pragmas_Index := 1;
1648 List_Pragmas_Mode := True;
1649 E := First_Error_Msg;
1651 -- Normal case, to stdout (copyright notice already output)
1653 if Full_List_File_Name = null then
1654 if not Debug_Flag_7 then
1661 Create_List_File_Access.all (Full_List_File_Name.all);
1662 Set_Special_Output (Write_List_Info_Access.all'Access);
1664 -- Write copyright notice to file
1666 if not Debug_Flag_7 then
1667 Write_Str ("GNAT ");
1668 Write_Str (Gnat_Version_String);
1670 Write_Str ("Copyright 1992-" &
1672 ", Free Software Foundation, Inc.");
1677 -- First list extended main source file units with errors
1679 for U in Main_Unit .. Last_Unit loop
1680 if In_Extended_Main_Source_Unit (Cunit_Entity (U))
1682 -- If debug flag d.m is set, only the main source is listed
1684 and then (U = Main_Unit or else not Debug_Flag_Dot_M)
1686 -- If the unit of the entity does not come from source, it is
1687 -- an implicit subprogram declaration for a child subprogram.
1688 -- Do not emit errors for it, they are listed with the body.
1691 (No (Cunit_Entity (U))
1692 or else Comes_From_Source (Cunit_Entity (U))
1693 or else not Is_Subprogram (Cunit_Entity (U)))
1696 Sfile : constant Source_File_Index := Source_Index (U);
1700 Write_Header (Sfile);
1703 -- Normally, we don't want an "error messages from file"
1704 -- message when listing the entire file, so we set the
1705 -- current source file as the current error source file.
1706 -- However, the old style of doing things was to list this
1707 -- message if pragma Source_Reference is present, even for
1708 -- the main unit. Since the purpose of the -gnatd.m switch
1709 -- is to duplicate the old behavior, we skip the reset if
1710 -- this debug flag is set.
1712 if not Debug_Flag_Dot_M then
1713 Current_Error_Source_File := Sfile;
1716 for N in 1 .. Last_Source_Line (Sfile) loop
1717 while E /= No_Error_Msg
1718 and then Errors.Table (E).Deleted
1720 E := Errors.Table (E).Next;
1725 and then Errors.Table (E).Line = N
1726 and then Errors.Table (E).Sfile = Sfile;
1728 Output_Source_Line (N, Sfile, Err_Flag);
1731 Output_Error_Msgs (E);
1733 if not Debug_Flag_2 then
1742 -- Then output errors, if any, for subsidiary units not in the
1743 -- main extended unit.
1745 -- Note: if debug flag d.m set, include errors for any units other
1746 -- than the main unit in the extended source unit (e.g. spec and
1747 -- subunits for a body).
1749 while E /= No_Error_Msg
1750 and then (not In_Extended_Main_Source_Unit (Errors.Table (E).Sptr)
1753 and then Get_Source_Unit
1754 (Errors.Table (E).Sptr) /= Main_Unit))
1756 if Errors.Table (E).Deleted then
1757 E := Errors.Table (E).Next;
1762 (Errors.Table (E).Line, Errors.Table (E).Sfile, True);
1763 Output_Error_Msgs (E);
1767 -- If output to file, write extra copy of error summary to the
1768 -- output file, and then close it.
1770 if Full_List_File_Name /= null then
1771 Write_Error_Summary;
1773 Close_List_File_Access.all;
1774 Cancel_Special_Output;
1778 -- Verbose mode (error lines only with error flags). Normally this is
1779 -- ignored in full list mode, unless we are listing to a file, in which
1780 -- case we still generate -gnatv output to standard output.
1783 and then (not Full_List or else Full_List_File_Name /= null)
1786 Write_Header (Main_Source_File);
1787 E := First_Error_Msg;
1789 -- Loop through error lines
1791 while E /= No_Error_Msg loop
1792 if Errors.Table (E).Deleted then
1793 E := Errors.Table (E).Next;
1797 (Errors.Table (E).Line, Errors.Table (E).Sfile, True);
1798 Output_Error_Msgs (E);
1803 -- Output error summary if verbose or full list mode
1805 if Verbose_Mode or else Full_List then
1806 Write_Error_Summary;
1811 if Warning_Mode = Treat_As_Error then
1812 Total_Errors_Detected := Total_Errors_Detected + Warnings_Detected;
1813 Warnings_Detected := 0;
1815 end Output_Messages;
1817 ------------------------
1818 -- Output_Source_Line --
1819 ------------------------
1821 procedure Output_Source_Line
1822 (L : Physical_Line_Number;
1823 Sfile : Source_File_Index;
1829 Line_Number_Output : Boolean := False;
1830 -- Set True once line number is output
1832 Empty_Line : Boolean := True;
1833 -- Set False if line includes at least one character
1836 if Sfile /= Current_Error_Source_File then
1837 Write_Str ("==============Error messages for ");
1839 case Sinput.File_Type (Sfile) is
1841 Write_Str ("source");
1843 when Sinput.Config =>
1844 Write_Str ("configuration pragmas");
1847 Write_Str ("symbol definition");
1849 when Sinput.Preproc =>
1850 Write_Str ("preprocessing data");
1853 Write_Str (" file: ");
1854 Write_Name (Full_File_Name (Sfile));
1857 if Num_SRef_Pragmas (Sfile) > 0 then
1858 Write_Str ("--------------Line numbers from file: ");
1859 Write_Name (Full_Ref_Name (Sfile));
1860 Write_Str (" (starting at line ");
1861 Write_Int (Int (First_Mapped_Line (Sfile)));
1866 Current_Error_Source_File := Sfile;
1869 if Errs or List_Pragmas_Mode then
1870 Output_Line_Number (Physical_To_Logical (L, Sfile));
1871 Line_Number_Output := True;
1874 S := Line_Start (L, Sfile);
1877 C := Source_Text (Sfile) (S);
1878 exit when C = ASCII.LF or else C = ASCII.CR or else C = EOF;
1880 -- Deal with matching entry in List_Pragmas table
1883 and then List_Pragmas_Index <= List_Pragmas.Last
1884 and then S = List_Pragmas.Table (List_Pragmas_Index).Ploc
1886 case List_Pragmas.Table (List_Pragmas_Index).Ptyp is
1890 -- Ignore if on line with errors so that error flags
1891 -- get properly listed with the error line .
1894 Write_Char (ASCII.FF);
1898 List_Pragmas_Mode := True;
1900 if not Line_Number_Output then
1901 Output_Line_Number (Physical_To_Logical (L, Sfile));
1902 Line_Number_Output := True;
1909 List_Pragmas_Mode := False;
1912 List_Pragmas_Index := List_Pragmas_Index + 1;
1914 -- Normal case (no matching entry in List_Pragmas table)
1917 if Errs or List_Pragmas_Mode then
1922 Empty_Line := False;
1926 -- If we have output a source line, then add the line terminator, with
1927 -- training spaces preserved (so we output the line exactly as input).
1929 if Line_Number_Output then
1933 Write_Eol_Keep_Blanks;
1936 end Output_Source_Line;
1938 -----------------------------
1939 -- Remove_Warning_Messages --
1940 -----------------------------
1942 procedure Remove_Warning_Messages (N : Node_Id) is
1944 function Check_For_Warning (N : Node_Id) return Traverse_Result;
1945 -- This function checks one node for a possible warning message
1947 function Check_All_Warnings is new Traverse_Func (Check_For_Warning);
1948 -- This defines the traversal operation
1950 -----------------------
1951 -- Check_For_Warning --
1952 -----------------------
1954 function Check_For_Warning (N : Node_Id) return Traverse_Result is
1955 Loc : constant Source_Ptr := Sloc (N);
1958 function To_Be_Removed (E : Error_Msg_Id) return Boolean;
1959 -- Returns True for a message that is to be removed. Also adjusts
1960 -- warning count appropriately.
1966 function To_Be_Removed (E : Error_Msg_Id) return Boolean is
1968 if E /= No_Error_Msg
1970 -- Don't remove if location does not match
1972 and then Errors.Table (E).Optr = Loc
1974 -- Don't remove if not warning/info message. Note that we do
1975 -- not remove style messages here. They are warning messages
1976 -- but not ones we want removed in this context.
1978 and then Errors.Table (E).Warn
1980 -- Don't remove unconditional messages
1982 and then not Errors.Table (E).Uncond
1984 Warnings_Detected := Warnings_Detected - 1;
1987 -- No removal required
1994 -- Start of processing for Check_For_Warnings
1997 while To_Be_Removed (First_Error_Msg) loop
1998 First_Error_Msg := Errors.Table (First_Error_Msg).Next;
2001 if First_Error_Msg = No_Error_Msg then
2002 Last_Error_Msg := No_Error_Msg;
2005 E := First_Error_Msg;
2006 while E /= No_Error_Msg loop
2007 while To_Be_Removed (Errors.Table (E).Next) loop
2008 Errors.Table (E).Next :=
2009 Errors.Table (Errors.Table (E).Next).Next;
2011 if Errors.Table (E).Next = No_Error_Msg then
2012 Last_Error_Msg := E;
2016 E := Errors.Table (E).Next;
2019 if Nkind (N) = N_Raise_Constraint_Error
2020 and then Original_Node (N) /= N
2021 and then No (Condition (N))
2023 -- Warnings may have been posted on subexpressions of the original
2024 -- tree. We place the original node back on the tree to remove
2025 -- those warnings, whose sloc do not match those of any node in
2026 -- the current tree. Given that we are in unreachable code, this
2027 -- modification to the tree is harmless.
2030 Status : Traverse_Final_Result;
2033 if Is_List_Member (N) then
2034 Set_Condition (N, Original_Node (N));
2035 Status := Check_All_Warnings (Condition (N));
2037 Rewrite (N, Original_Node (N));
2038 Status := Check_All_Warnings (N);
2047 end Check_For_Warning;
2049 -- Start of processing for Remove_Warning_Messages
2052 if Warnings_Detected /= 0 then
2054 Discard : Traverse_Final_Result;
2055 pragma Warnings (Off, Discard);
2058 Discard := Check_All_Warnings (N);
2061 end Remove_Warning_Messages;
2063 procedure Remove_Warning_Messages (L : List_Id) is
2066 if Is_Non_Empty_List (L) then
2068 while Present (Stat) loop
2069 Remove_Warning_Messages (Stat);
2073 end Remove_Warning_Messages;
2075 ---------------------------
2076 -- Set_Identifier_Casing --
2077 ---------------------------
2079 procedure Set_Identifier_Casing
2080 (Identifier_Name : System.Address;
2081 File_Name : System.Address)
2083 Ident : constant Big_String_Ptr := To_Big_String_Ptr (Identifier_Name);
2084 File : constant Big_String_Ptr := To_Big_String_Ptr (File_Name);
2087 Desired_Case : Casing_Type := Mixed_Case;
2088 -- Casing required for result. Default value of Mixed_Case is used if
2089 -- for some reason we cannot find the right file name in the table.
2092 -- Get length of file name
2095 while File (Flen + 1) /= ASCII.NUL loop
2099 -- Loop through file names to find matching one. This is a bit slow, but
2100 -- we only do it in error situations so it is not so terrible. Note that
2101 -- if the loop does not exit, then the desired case will be left set to
2102 -- Mixed_Case, this can happen if the name was not in canonical form,
2103 -- and gets canonicalized on VMS. Possibly we could fix this by
2104 -- unconditinally canonicalizing these names ???
2106 for J in 1 .. Last_Source_File loop
2107 Get_Name_String (Full_Debug_Name (J));
2110 and then Name_Buffer (1 .. Name_Len) = String (File (1 .. Flen))
2112 Desired_Case := Identifier_Casing (J);
2117 -- Copy identifier as given to Name_Buffer
2119 for J in Name_Buffer'Range loop
2120 Name_Buffer (J) := Ident (J);
2122 if Name_Buffer (J) = ASCII.NUL then
2128 Set_Casing (Desired_Case);
2129 end Set_Identifier_Casing;
2131 -----------------------
2132 -- Set_Ignore_Errors --
2133 -----------------------
2135 procedure Set_Ignore_Errors (To : Boolean) is
2137 Errors_Must_Be_Ignored := To;
2138 end Set_Ignore_Errors;
2140 ------------------------------
2141 -- Set_Msg_Insertion_Column --
2142 ------------------------------
2144 procedure Set_Msg_Insertion_Column is
2146 if RM_Column_Check then
2147 Set_Msg_Str (" in column ");
2148 Set_Msg_Int (Int (Error_Msg_Col) + 1);
2150 end Set_Msg_Insertion_Column;
2152 ----------------------------
2153 -- Set_Msg_Insertion_Node --
2154 ----------------------------
2156 procedure Set_Msg_Insertion_Node is
2161 Error_Msg_Node_1 = Error
2162 or else Error_Msg_Node_1 = Any_Type;
2164 if Error_Msg_Node_1 = Empty then
2165 Set_Msg_Blank_Conditional;
2166 Set_Msg_Str ("<empty>");
2168 elsif Error_Msg_Node_1 = Error then
2170 Set_Msg_Str ("<error>");
2172 elsif Error_Msg_Node_1 = Standard_Void_Type then
2174 Set_Msg_Str ("procedure name");
2177 Set_Msg_Blank_Conditional;
2181 K := Nkind (Error_Msg_Node_1);
2183 -- If we have operator case, skip quotes since name of operator
2184 -- itself will supply the required quotations. An operator can be an
2185 -- applied use in an expression or an explicit operator symbol, or an
2186 -- identifier whose name indicates it is an operator.
2189 or else K = N_Operator_Symbol
2190 or else K = N_Defining_Operator_Symbol
2191 or else ((K = N_Identifier or else K = N_Defining_Identifier)
2192 and then Is_Operator_Name (Chars (Error_Msg_Node_1)))
2194 Set_Msg_Node (Error_Msg_Node_1);
2196 -- Normal case, not an operator, surround with quotes
2200 Set_Qualification (Error_Msg_Qual_Level, Error_Msg_Node_1);
2201 Set_Msg_Node (Error_Msg_Node_1);
2206 -- The following assignment ensures that a second ampersand insertion
2207 -- character will correspond to the Error_Msg_Node_2 parameter. We
2208 -- suppress possible validity checks in case operating in -gnatVa mode,
2209 -- and Error_Msg_Node_2 is not needed and has not been set.
2212 pragma Suppress (Range_Check);
2214 Error_Msg_Node_1 := Error_Msg_Node_2;
2216 end Set_Msg_Insertion_Node;
2218 --------------------------------------
2219 -- Set_Msg_Insertion_Type_Reference --
2220 --------------------------------------
2222 procedure Set_Msg_Insertion_Type_Reference (Flag : Source_Ptr) is
2228 if Error_Msg_Node_1 = Standard_Void_Type then
2229 Set_Msg_Str ("package or procedure name");
2232 elsif Error_Msg_Node_1 = Standard_Exception_Type then
2233 Set_Msg_Str ("exception name");
2236 elsif Error_Msg_Node_1 = Any_Access
2237 or else Error_Msg_Node_1 = Any_Array
2238 or else Error_Msg_Node_1 = Any_Boolean
2239 or else Error_Msg_Node_1 = Any_Character
2240 or else Error_Msg_Node_1 = Any_Composite
2241 or else Error_Msg_Node_1 = Any_Discrete
2242 or else Error_Msg_Node_1 = Any_Fixed
2243 or else Error_Msg_Node_1 = Any_Integer
2244 or else Error_Msg_Node_1 = Any_Modular
2245 or else Error_Msg_Node_1 = Any_Numeric
2246 or else Error_Msg_Node_1 = Any_Real
2247 or else Error_Msg_Node_1 = Any_Scalar
2248 or else Error_Msg_Node_1 = Any_String
2250 Get_Unqualified_Decoded_Name_String (Chars (Error_Msg_Node_1));
2251 Set_Msg_Name_Buffer;
2254 elsif Error_Msg_Node_1 = Universal_Real then
2255 Set_Msg_Str ("type universal real");
2258 elsif Error_Msg_Node_1 = Universal_Integer then
2259 Set_Msg_Str ("type universal integer");
2262 elsif Error_Msg_Node_1 = Universal_Fixed then
2263 Set_Msg_Str ("type universal fixed");
2267 -- Special case of anonymous array
2269 if Nkind (Error_Msg_Node_1) in N_Entity
2270 and then Is_Array_Type (Error_Msg_Node_1)
2271 and then Present (Related_Array_Object (Error_Msg_Node_1))
2273 Set_Msg_Str ("type of ");
2274 Set_Msg_Node (Related_Array_Object (Error_Msg_Node_1));
2275 Set_Msg_Str (" declared");
2276 Set_Msg_Insertion_Line_Number
2277 (Sloc (Related_Array_Object (Error_Msg_Node_1)), Flag);
2281 -- If we fall through, it is not a special case, so first output
2282 -- the name of the type, preceded by private for a private type
2284 if Is_Private_Type (Error_Msg_Node_1) then
2285 Set_Msg_Str ("private type ");
2287 Set_Msg_Str ("type ");
2290 Ent := Error_Msg_Node_1;
2292 if Is_Internal_Name (Chars (Ent)) then
2293 Unwind_Internal_Type (Ent);
2296 -- Types in Standard are displayed as "Standard.name"
2298 if Sloc (Ent) <= Standard_Location then
2300 Set_Msg_Str ("Standard.");
2305 -- Types in other language defined units are displayed as
2306 -- "package-name.type-name"
2309 Is_Predefined_File_Name (Unit_File_Name (Get_Source_Unit (Ent)))
2311 Get_Unqualified_Decoded_Name_String
2312 (Unit_Name (Get_Source_Unit (Ent)));
2313 Name_Len := Name_Len - 2;
2315 Set_Casing (Mixed_Case);
2316 Set_Msg_Name_Buffer;
2318 Set_Casing (Mixed_Case);
2323 -- All other types display as "type name" defined at line xxx
2324 -- possibly qualified if qualification is requested.
2328 Set_Qualification (Error_Msg_Qual_Level, Ent);
2332 -- If Ent is an anonymous subprogram type, there is no name to print,
2333 -- so remove enclosing quotes.
2335 if Buffer_Ends_With ("""") then
2336 Buffer_Remove ("""");
2342 -- If the original type did not come from a predefined file, add the
2343 -- location where the type was defined.
2345 if Sloc (Error_Msg_Node_1) > Standard_Location
2347 not Is_Predefined_File_Name
2348 (Unit_File_Name (Get_Source_Unit (Error_Msg_Node_1)))
2350 Set_Msg_Str (" defined");
2351 Set_Msg_Insertion_Line_Number (Sloc (Error_Msg_Node_1), Flag);
2353 -- If it did come from a predefined file, deal with the case where
2354 -- this was a file with a generic instantiation from elsewhere.
2357 if Sloc (Error_Msg_Node_1) > Standard_Location then
2359 Iloc : constant Source_Ptr :=
2360 Instantiation_Location (Sloc (Error_Msg_Node_1));
2363 if Iloc /= No_Location
2364 and then not Suppress_Instance_Location
2366 Set_Msg_Str (" from instance");
2367 Set_Msg_Insertion_Line_Number (Iloc, Flag);
2372 end Set_Msg_Insertion_Type_Reference;
2374 ---------------------------------
2375 -- Set_Msg_Insertion_Unit_Name --
2376 ---------------------------------
2378 procedure Set_Msg_Insertion_Unit_Name (Suffix : Boolean := True) is
2380 if Error_Msg_Unit_1 = No_Unit_Name then
2383 elsif Error_Msg_Unit_1 = Error_Unit_Name then
2385 Set_Msg_Str ("<error>");
2388 Get_Unit_Name_String (Error_Msg_Unit_1, Suffix);
2391 Set_Msg_Name_Buffer;
2395 -- The following assignment ensures that a second percent insertion
2396 -- character will correspond to the Error_Msg_Unit_2 parameter. We
2397 -- suppress possible validity checks in case operating in -gnatVa mode,
2398 -- and Error_Msg_Unit_2 is not needed and has not been set.
2401 pragma Suppress (Range_Check);
2403 Error_Msg_Unit_1 := Error_Msg_Unit_2;
2405 end Set_Msg_Insertion_Unit_Name;
2411 procedure Set_Msg_Node (Node : Node_Id) is
2416 if Nkind (Node) = N_Designator then
2417 Set_Msg_Node (Name (Node));
2419 Set_Msg_Node (Identifier (Node));
2422 elsif Nkind (Node) = N_Defining_Program_Unit_Name then
2423 Set_Msg_Node (Name (Node));
2425 Set_Msg_Node (Defining_Identifier (Node));
2428 elsif Nkind (Node) = N_Selected_Component then
2429 Set_Msg_Node (Prefix (Node));
2431 Set_Msg_Node (Selector_Name (Node));
2435 -- The only remaining possibilities are identifiers, defining
2436 -- identifiers, pragmas, and pragma argument associations.
2438 if Nkind (Node) = N_Pragma then
2439 Nam := Pragma_Name (Node);
2441 -- The other cases have Chars fields, and we want to test for possible
2442 -- internal names, which generally represent something gone wrong. An
2443 -- exception is the case of internal type names, where we try to find a
2444 -- reasonable external representation for the external name
2446 elsif Is_Internal_Name (Chars (Node))
2448 ((Is_Entity_Name (Node)
2449 and then Present (Entity (Node))
2450 and then Is_Type (Entity (Node)))
2452 (Nkind (Node) = N_Defining_Identifier and then Is_Type (Node)))
2454 if Nkind (Node) = N_Identifier then
2455 Ent := Entity (Node);
2460 -- If the type is the designated type of an access_to_subprogram,
2461 -- there is no name to provide in the call.
2463 if Ekind (Ent) = E_Subprogram_Type then
2466 Unwind_Internal_Type (Ent);
2470 -- If not internal name, just use name in Chars field
2473 Nam := Chars (Node);
2476 -- At this stage, the name to output is in Nam
2478 Get_Unqualified_Decoded_Name_String (Nam);
2480 -- Remove trailing upper case letters from the name (useful for
2481 -- dealing with some cases of internal names.
2483 while Name_Len > 1 and then Name_Buffer (Name_Len) in 'A' .. 'Z' loop
2484 Name_Len := Name_Len - 1;
2487 -- If we have any of the names from standard that start with the
2488 -- characters "any " (e.g. Any_Type), then kill the message since
2489 -- almost certainly it is a junk cascaded message.
2492 and then Name_Buffer (1 .. 4) = "any "
2494 Kill_Message := True;
2497 -- Now we have to set the proper case. If we have a source location
2498 -- then do a check to see if the name in the source is the same name
2499 -- as the name in the Names table, except for possible differences
2500 -- in case, which is the case when we can copy from the source.
2503 Src_Loc : constant Source_Ptr := Sloc (Node);
2504 Sbuffer : Source_Buffer_Ptr;
2506 Src_Ptr : Source_Ptr;
2512 -- For standard locations, always use mixed case
2514 if Src_Loc <= No_Location
2515 or else Sloc (Node) <= No_Location
2517 Set_Casing (Mixed_Case);
2520 -- Determine if the reference we are dealing with corresponds to
2521 -- text at the point of the error reference. This will often be
2522 -- the case for simple identifier references, and is the case
2523 -- where we can copy the spelling from the source.
2525 Sbuffer := Source_Text (Get_Source_File_Index (Src_Loc));
2527 while Ref_Ptr <= Name_Len loop
2529 Fold_Lower (Sbuffer (Src_Ptr)) /=
2530 Fold_Lower (Name_Buffer (Ref_Ptr));
2531 Ref_Ptr := Ref_Ptr + 1;
2532 Src_Ptr := Src_Ptr + 1;
2535 -- If we get through the loop without a mismatch, then output the
2536 -- name the way it is spelled in the source program
2538 if Ref_Ptr > Name_Len then
2541 for J in 1 .. Name_Len loop
2542 Name_Buffer (J) := Sbuffer (Src_Ptr);
2543 Src_Ptr := Src_Ptr + 1;
2546 -- Otherwise set the casing using the default identifier casing
2549 Set_Casing (Identifier_Casing (Flag_Source), Mixed_Case);
2554 Set_Msg_Name_Buffer;
2562 procedure Set_Msg_Text (Text : String; Flag : Source_Ptr) is
2563 C : Character; -- Current character
2564 P : Natural; -- Current index;
2567 Manual_Quote_Mode := False;
2568 Is_Unconditional_Msg := False;
2570 Flag_Source := Get_Source_File_Index (Flag);
2573 while P <= Text'Last loop
2577 -- Check for insertion character or sequence
2581 if P <= Text'Last and then Text (P) = '%' then
2583 Set_Msg_Insertion_Name_Literal;
2585 Set_Msg_Insertion_Name;
2589 if P <= Text'Last and then Text (P) = '$' then
2591 Set_Msg_Insertion_Unit_Name (Suffix => False);
2594 Set_Msg_Insertion_Unit_Name;
2598 Set_Msg_Insertion_File_Name;
2601 Set_Msg_Insertion_Type_Reference (Flag);
2604 Set_Msg_Insertion_Reserved_Name;
2607 Set_Msg_Insertion_Node;
2610 Set_Msg_Insertion_Line_Number (Error_Msg_Sloc, Flag);
2613 Continuation := True;
2615 if Text (P) = '\' then
2616 Continuation_New_Line := True;
2621 Set_Msg_Insertion_Column;
2624 Set_Msg_Insertion_Run_Time_Name;
2627 Set_Msg_Insertion_Uint;
2630 Manual_Quote_Mode := not Manual_Quote_Mode;
2634 Is_Unconditional_Msg := True;
2637 null; -- already dealt with
2640 null; -- already dealt with
2643 null; -- already dealt with
2646 Set_Msg_Char (Text (P));
2650 Set_Msg_Str (Error_Msg_String (1 .. Error_Msg_Strlen));
2652 -- Upper case letter
2656 -- Start of reserved word if two or more
2658 if P <= Text'Last and then Text (P) in 'A' .. 'Z' then
2660 Set_Msg_Insertion_Reserved_Word (Text, P);
2662 -- Single upper case letter is just inserted
2668 -- Normal character with no special treatment
2682 procedure Set_Posted (N : Node_Id) is
2686 if Is_Serious_Error then
2688 -- We always set Error_Posted on the node itself
2690 Set_Error_Posted (N);
2692 -- If it is a subexpression, then set Error_Posted on parents up to
2693 -- and including the first non-subexpression construct. This helps
2694 -- avoid cascaded error messages within a single expression.
2700 Set_Error_Posted (P);
2701 exit when Nkind (P) not in N_Subexpr;
2704 -- A special check, if we just posted an error on an attribute
2705 -- definition clause, then also set the entity involved as posted.
2706 -- For example, this stops complaining about the alignment after
2707 -- complaining about the size, which is likely to be useless.
2709 if Nkind (P) = N_Attribute_Definition_Clause then
2710 if Is_Entity_Name (Name (P)) then
2711 Set_Error_Posted (Entity (Name (P)));
2717 -----------------------
2718 -- Set_Qualification --
2719 -----------------------
2721 procedure Set_Qualification (N : Nat; E : Entity_Id) is
2723 if N /= 0 and then Scope (E) /= Standard_Standard then
2724 Set_Qualification (N - 1, Scope (E));
2725 Set_Msg_Node (Scope (E));
2728 end Set_Qualification;
2730 ------------------------
2731 -- Special_Msg_Delete --
2732 ------------------------
2734 -- Is it really right to have all this specialized knowledge in errout?
2736 function Special_Msg_Delete
2738 N : Node_Or_Entity_Id;
2739 E : Node_Or_Entity_Id) return Boolean
2742 -- Never delete messages in -gnatdO mode
2744 if Debug_Flag_OO then
2747 -- Processing for "atomic access cannot be guaranteed"
2749 elsif Msg = "atomic access to & cannot be guaranteed" then
2751 -- When an atomic object refers to a non-atomic type in the same
2752 -- scope, we implicitly make the type atomic. In the non-error case
2753 -- this is surely safe (and in fact prevents an error from occurring
2754 -- if the type is not atomic by default). But if the object cannot be
2755 -- made atomic, then we introduce an extra junk message by this
2756 -- manipulation, which we get rid of here.
2758 -- We identify this case by the fact that it references a type for
2759 -- which Is_Atomic is set, but there is no Atomic pragma setting it.
2762 and then Is_Atomic (E)
2763 and then No (Get_Rep_Pragma (E, Name_Atomic))
2768 -- Processing for "Size too small" messages
2770 elsif Msg = "size for& too small, minimum allowed is ^" then
2772 -- Suppress "size too small" errors in CodePeer mode, since pragma
2773 -- Pack is also ignored in this configuration.
2775 if CodePeer_Mode then
2778 -- When a size is wrong for a frozen type there is no explicit size
2779 -- clause, and other errors have occurred, suppress the message,
2780 -- since it is likely that this size error is a cascaded result of
2781 -- other errors. The reason we eliminate unfrozen types is that
2782 -- messages issued before the freeze type are for sure OK.
2785 and then Serious_Errors_Detected > 0
2786 and then Nkind (N) /= N_Component_Clause
2787 and then Nkind (Parent (N)) /= N_Component_Clause
2789 No (Get_Attribute_Definition_Clause (E, Attribute_Size))
2791 No (Get_Attribute_Definition_Clause (E, Attribute_Object_Size))
2793 No (Get_Attribute_Definition_Clause (E, Attribute_Value_Size))
2799 -- All special tests complete, so go ahead with message
2802 end Special_Msg_Delete;
2804 --------------------------
2805 -- Unwind_Internal_Type --
2806 --------------------------
2808 procedure Unwind_Internal_Type (Ent : in out Entity_Id) is
2809 Derived : Boolean := False;
2811 Old_Ent : Entity_Id;
2814 -- Undo placement of a quote, since we will put it back later
2816 Mchar := Msg_Buffer (Msglen);
2819 Msglen := Msglen - 1;
2822 -- The loop here deals with recursive types, we are trying to find a
2823 -- related entity that is not an implicit type. Note that the check with
2824 -- Old_Ent stops us from getting "stuck". Also, we don't output the
2825 -- "type derived from" message more than once in the case where we climb
2826 -- up multiple levels.
2831 -- Implicit access type, use directly designated type In Ada 2005,
2832 -- the designated type may be an anonymous access to subprogram, in
2833 -- which case we can only point to its definition.
2835 if Is_Access_Type (Ent) then
2836 if Ekind (Ent) = E_Access_Subprogram_Type
2837 or else Ekind (Ent) = E_Anonymous_Access_Subprogram_Type
2838 or else Is_Access_Protected_Subprogram_Type (Ent)
2840 Ent := Directly_Designated_Type (Ent);
2842 if not Comes_From_Source (Ent) then
2843 if Buffer_Ends_With ("type ") then
2844 Buffer_Remove ("type ");
2847 if Is_Itype (Ent) then
2849 Assoc : constant Node_Id :=
2850 Associated_Node_For_Itype (Ent);
2853 if Nkind (Assoc) in N_Subprogram_Specification then
2855 -- Anonymous access to subprogram in a signature.
2856 -- Indicate the enclosing subprogram.
2860 (Associated_Node_For_Itype (Ent));
2862 ("access to subprogram declared in profile of ");
2865 Set_Msg_Str ("access to subprogram with profile ");
2870 elsif Ekind (Ent) = E_Function then
2871 Set_Msg_Str ("access to function ");
2873 Set_Msg_Str ("access to procedure ");
2878 -- Type is access to object, named or anonymous
2881 Set_Msg_Str ("access to ");
2882 Ent := Directly_Designated_Type (Ent);
2887 elsif Is_Class_Wide_Type (Ent) then
2889 Ent := Root_Type (Ent);
2891 -- Use base type if this is a subtype
2893 elsif Ent /= Base_Type (Ent) then
2894 Buffer_Remove ("type ");
2896 -- Avoid duplication "subtype of subtype of", and also replace
2897 -- "derived from subtype of" simply by "derived from"
2899 if not Buffer_Ends_With ("subtype of ")
2900 and then not Buffer_Ends_With ("derived from ")
2902 Set_Msg_Str ("subtype of ");
2905 Ent := Base_Type (Ent);
2907 -- If this is a base type with a first named subtype, use the first
2908 -- named subtype instead. This is not quite accurate in all cases,
2909 -- but it makes too much noise to be accurate and add 'Base in all
2910 -- cases. Note that we only do this is the first named subtype is not
2911 -- itself an internal name. This avoids the obvious loop (subtype ->
2912 -- basetype -> subtype) which would otherwise occur!)
2916 FST : constant Entity_Id := First_Subtype (Ent);
2919 if not Is_Internal_Name (Chars (FST)) then
2923 -- Otherwise use root type
2927 Buffer_Remove ("type ");
2929 -- Test for "subtype of type derived from" which seems
2930 -- excessive and is replaced by "type derived from".
2932 Buffer_Remove ("subtype of");
2934 -- Avoid duplicated "type derived from type derived from"
2936 if not Buffer_Ends_With ("type derived from ") then
2937 Set_Msg_Str ("type derived from ");
2948 -- If we are stuck in a loop, get out and settle for the internal
2949 -- name after all. In this case we set to kill the message if it is
2950 -- not the first error message (we really try hard not to show the
2951 -- dirty laundry of the implementation to the poor user!)
2953 if Ent = Old_Ent then
2954 Kill_Message := True;
2958 -- Get out if we finally found a non-internal name to use
2960 exit Find when not Is_Internal_Name (Chars (Ent));
2966 end Unwind_Internal_Type;
2972 procedure VMS_Convert is
2982 P := Msg_Buffer'First;
2988 if Msg_Buffer (P) = '-' then
2989 for G in Gnames'Range loop
2990 L := Gnames (G)'Length;
2992 -- See if we have "-ggg switch", where ggg is Gnames entry
2994 if P + L + 7 <= Msglen
2995 and then Msg_Buffer (P + 1 .. P + L) = Gnames (G).all
2996 and then Msg_Buffer (P + L + 1 .. P + L + 7) = " switch"
2998 -- Replace by "/vvv qualifier", where vvv is Vnames entry
3000 N := Vnames (G)'Length;
3001 Msg_Buffer (P + N + 11 .. Msglen + N - L + 3) :=
3002 Msg_Buffer (P + L + 8 .. Msglen);
3003 Msg_Buffer (P) := '/';
3004 Msg_Buffer (P + 1 .. P + N) := Vnames (G).all;
3005 Msg_Buffer (P + N + 1 .. P + N + 10) := " qualifier";
3007 Msglen := Msglen + N - L + 3;