1 ------------------------------------------------------------------------------
3 -- GNAT COMPILER COMPONENTS --
9 -- Copyright (C) 1992-2008, Free Software Foundation, Inc. --
11 -- GNAT is free software; you can redistribute it and/or modify it under --
12 -- terms of the GNU General Public License as published by the Free Soft- --
13 -- ware Foundation; either version 3, or (at your option) any later ver- --
14 -- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
15 -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
16 -- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License --
17 -- for more details. You should have received a copy of the GNU General --
18 -- Public License distributed with GNAT; see file COPYING3. If not, go to --
19 -- http://www.gnu.org/licenses for a complete copy of the license. --
21 -- GNAT was originally developed by the GNAT team at New York University. --
22 -- Extensive contributions were provided by Ada Core Technologies Inc. --
24 ------------------------------------------------------------------------------
26 -- Warning! Error messages can be generated during Gigi processing by direct
27 -- calls to error message routines, so it is essential that the processing
28 -- in this body be consistent with the requirements for the Gigi processing
29 -- environment, and that in particular, no disallowed table expansion is
32 with Atree; use Atree;
33 with Casing; use Casing;
34 with Csets; use Csets;
35 with Debug; use Debug;
36 with Einfo; use Einfo;
37 with Erroutc; use Erroutc;
38 with Fname; use Fname;
39 with Gnatvsn; use Gnatvsn;
40 with Hostparm; use Hostparm;
43 with Nlists; use Nlists;
44 with Output; use Output;
45 with Scans; use Scans;
46 with Sinput; use Sinput;
47 with Sinfo; use Sinfo;
48 with Snames; use Snames;
49 with Stand; use Stand;
51 with Uname; use Uname;
53 package body Errout is
55 Errors_Must_Be_Ignored : Boolean := False;
56 -- Set to True by procedure Set_Ignore_Errors (True), when calls to
57 -- error message procedures should be ignored (when parsing irrelevant
58 -- text in sources being preprocessed).
60 Finalize_Called : Boolean := False;
61 -- Set True if the Finalize routine has been called
63 Warn_On_Instance : Boolean;
64 -- Flag set true for warning message to be posted on instance
66 ------------------------------------
67 -- Table of Non-Instance Messages --
68 ------------------------------------
70 -- This table contains an entry for every error message processed by the
71 -- Error_Msg routine that is not posted on generic (or inlined) instance.
72 -- As explained in further detail in the Error_Msg procedure body, this
73 -- table is used to avoid posting redundant messages on instances.
75 type NIM_Record is record
79 -- Type used to store text and location of one message
81 package Non_Instance_Msgs is new Table.Table (
82 Table_Component_Type => NIM_Record,
83 Table_Index_Type => Int,
86 Table_Increment => 100,
87 Table_Name => "Non_Instance_Msgs");
89 -----------------------
90 -- Local Subprograms --
91 -----------------------
93 procedure Error_Msg_Internal
98 -- This is the low level routine used to post messages after dealing with
99 -- the issue of messages placed on instantiations (which get broken up
100 -- into separate calls in Error_Msg). Sptr is the location on which the
101 -- flag will be placed in the output. In the case where the flag is on
102 -- the template, this points directly to the template, not to one of the
103 -- instantiation copies of the template. Optr is the original location
104 -- used to flag the error, and this may indeed point to an instantiation
105 -- copy. So typically we can see Optr pointing to the template location
106 -- in an instantiation copy when Sptr points to the source location of
107 -- the actual instantiation (i.e the line with the new). Msg_Cont is
108 -- set true if this is a continuation message.
110 function No_Warnings (N : Node_Or_Entity_Id) return Boolean;
111 -- Determines if warnings should be suppressed for the given node
113 function OK_Node (N : Node_Id) return Boolean;
114 -- Determines if a node is an OK node to place an error message on (return
115 -- True) or if the error message should be suppressed (return False). A
116 -- message is suppressed if the node already has an error posted on it,
117 -- or if it refers to an Etype that has an error posted on it, or if
118 -- it references an Entity that has an error posted on it.
120 procedure Output_Source_Line
121 (L : Physical_Line_Number;
122 Sfile : Source_File_Index;
124 -- Outputs text of source line L, in file S, together with preceding line
125 -- number, as described above for Output_Line_Number. The Errs parameter
126 -- indicates if there are errors attached to the line, which forces
127 -- listing on, even in the presence of pragma List (Off).
129 procedure Set_Msg_Insertion_Column;
130 -- Handle column number insertion (@ insertion character)
132 procedure Set_Msg_Insertion_Node;
133 -- Handle node (name from node) insertion (& insertion character)
135 procedure Set_Msg_Insertion_Type_Reference (Flag : Source_Ptr);
136 -- Handle type reference (right brace insertion character). Flag is the
137 -- location of the flag, which is provided for the internal call to
138 -- Set_Msg_Insertion_Line_Number,
140 procedure Set_Msg_Insertion_Unit_Name (Suffix : Boolean := True);
141 -- Handle unit name insertion ($ insertion character). Depending on Boolean
142 -- parameter Suffix, (spec) or (body) is appended after the unit name.
144 procedure Set_Msg_Node (Node : Node_Id);
145 -- Add the sequence of characters for the name associated with the
146 -- given node to the current message.
148 procedure Set_Msg_Text (Text : String; Flag : Source_Ptr);
149 -- Add a sequence of characters to the current message. The characters may
150 -- be one of the special insertion characters (see documentation in spec).
151 -- Flag is the location at which the error is to be posted, which is used
152 -- to determine whether or not the # insertion needs a file name. The
153 -- variables Msg_Buffer, Msglen, Is_Style_Msg, Is_Warning_Msg, and
154 -- Is_Unconditional_Msg are set on return.
156 procedure Set_Posted (N : Node_Id);
157 -- Sets the Error_Posted flag on the given node, and all its parents
158 -- that are subexpressions and then on the parent non-subexpression
159 -- construct that contains the original expression (this reduces the
160 -- number of cascaded messages). Note that this call only has an effect
161 -- for a serious error. For a non-serious error, it has no effect.
163 procedure Set_Qualification (N : Nat; E : Entity_Id);
164 -- Outputs up to N levels of qualification for the given entity. For
165 -- example, the entity A.B.C.D will output B.C. if N = 2.
167 function Special_Msg_Delete
169 N : Node_Or_Entity_Id;
170 E : Node_Or_Entity_Id) return Boolean;
171 -- This function is called from Error_Msg_NEL, passing the message Msg,
172 -- node N on which the error is to be posted, and the entity or node E
173 -- to be used for an & insertion in the message if any. The job of this
174 -- procedure is to test for certain cascaded messages that we would like
175 -- to suppress. If the message is to be suppressed then we return True.
176 -- If the message should be generated (the normal case) False is returned.
178 procedure Unwind_Internal_Type (Ent : in out Entity_Id);
179 -- This procedure is given an entity id for an internal type, i.e.
180 -- a type with an internal name. It unwinds the type to try to get
181 -- to something reasonably printable, generating prefixes like
182 -- "subtype of", "access to", etc along the way in the buffer. The
183 -- value in Ent on return is the final name to be printed. Hopefully
184 -- this is not an internal name, but in some internal name cases, it
185 -- is an internal name, and has to be printed anyway (although in this
186 -- case the message has been killed if possible). The global variable
187 -- Class_Flag is set to True if the resulting entity should have
188 -- 'Class appended to its name (see Add_Class procedure), and is
189 -- otherwise unchanged.
191 procedure VMS_Convert;
192 -- This procedure has no effect if called when the host is not OpenVMS.
193 -- If the host is indeed OpenVMS, then the error message stored in
194 -- Msg_Buffer is scanned for appearences of switch names which need
195 -- converting to corresponding VMS qualifer names. See Gnames/Vnames
196 -- table in Errout spec for precise definition of the conversion that
197 -- is performed by this routine in OpenVMS mode.
199 -----------------------
200 -- Change_Error_Text --
201 -----------------------
203 procedure Change_Error_Text (Error_Id : Error_Msg_Id; New_Msg : String) is
204 Save_Next : Error_Msg_Id;
205 Err_Id : Error_Msg_Id := Error_Id;
208 Set_Msg_Text (New_Msg, Errors.Table (Error_Id).Sptr);
209 Errors.Table (Error_Id).Text := new String'(Msg_Buffer (1 .. Msglen));
211 -- If in immediate error message mode, output modified error message now
212 -- This is just a bit tricky, because we want to output just a single
213 -- message, and the messages we modified is already linked in. We solve
214 -- this by temporarily resetting its forward pointer to empty.
216 if Debug_Flag_OO then
217 Save_Next := Errors.Table (Error_Id).Next;
218 Errors.Table (Error_Id).Next := No_Error_Msg;
221 (Errors.Table (Error_Id).Line, Errors.Table (Error_Id).Sfile, True);
222 Output_Error_Msgs (Err_Id);
223 Errors.Table (Error_Id).Next := Save_Next;
225 end Change_Error_Text;
227 ------------------------
228 -- Compilation_Errors --
229 ------------------------
231 function Compilation_Errors return Boolean is
233 if not Finalize_Called then
236 return Erroutc.Compilation_Errors;
238 end Compilation_Errors;
244 -- Error_Msg posts a flag at the given location, except that if the
245 -- Flag_Location points within a generic template and corresponds
246 -- to an instantiation of this generic template, then the actual
247 -- message will be posted on the generic instantiation, along with
248 -- additional messages referencing the generic declaration.
250 procedure Error_Msg (Msg : String; Flag_Location : Source_Ptr) is
251 Sindex : Source_File_Index;
252 -- Source index for flag location
254 Orig_Loc : Source_Ptr;
255 -- Original location of Flag_Location (i.e. location in original
256 -- template in instantiation case, otherwise unchanged).
259 -- It is a fatal error to issue an error message when scanning from
260 -- the internal source buffer (see Sinput for further documentation)
262 pragma Assert (Sinput.Source /= Internal_Source_Ptr);
264 -- Return if all errors are to be ignored
266 if Errors_Must_Be_Ignored then
270 -- If we already have messages, and we are trying to place a message
271 -- at No_Location or in package Standard, then just ignore the attempt
272 -- since we assume that what is happening is some cascaded junk. Note
273 -- that this is safe in the sense that proceeding will surely bomb.
275 if Flag_Location < First_Source_Ptr
276 and then Total_Errors_Detected > 0
281 -- Start processing of new message
283 Sindex := Get_Source_File_Index (Flag_Location);
284 Test_Style_Warning_Serious_Msg (Msg);
285 Orig_Loc := Original_Location (Flag_Location);
287 -- If the current location is in an instantiation, the issue arises
288 -- of whether to post the message on the template or the instantiation.
290 -- The way we decide is to see if we have posted the same message
291 -- on the template when we compiled the template (the template is
292 -- always compiled before any instantiations). For this purpose,
293 -- we use a separate table of messages. The reason we do this is
296 -- First, the messages can get changed by various processing
297 -- including the insertion of tokens etc, making it hard to
298 -- do the comparison.
300 -- Second, we will suppress a warning on a template if it is
301 -- not in the current extended source unit. That's reasonable
302 -- and means we don't want the warning on the instantiation
303 -- here either, but it does mean that the main error table
304 -- would not in any case include the message.
306 if Flag_Location = Orig_Loc then
307 Non_Instance_Msgs.Append ((new String'(Msg), Flag_Location));
308 Warn_On_Instance := False;
310 -- Here we have an instance message
313 -- Delete if debug flag off, and this message duplicates a
314 -- message already posted on the corresponding template
316 if not Debug_Flag_GG then
317 for J in Non_Instance_Msgs.First .. Non_Instance_Msgs.Last loop
318 if Msg = Non_Instance_Msgs.Table (J).Msg.all
319 and then Non_Instance_Msgs.Table (J).Loc = Orig_Loc
326 -- No duplicate, so error/warning will be posted on instance
328 Warn_On_Instance := Is_Warning_Msg;
331 -- Ignore warning message that is suppressed. Note that style
332 -- checks are not considered warning messages for this purpose
334 if Is_Warning_Msg and then Warnings_Suppressed (Orig_Loc) then
338 -- The idea at this stage is that we have two kinds of messages
340 -- First, we have those messages that are to be placed as requested at
341 -- Flag_Location. This includes messages that have nothing to do with
342 -- generics, and also messages placed on generic templates that reflect
343 -- an error in the template itself. For such messages we simply call
344 -- Error_Msg_Internal to place the message in the requested location.
346 if Instantiation (Sindex) = No_Location then
347 Error_Msg_Internal (Msg, Flag_Location, Flag_Location, False);
351 -- If we are trying to flag an error in an instantiation, we may have
352 -- a generic contract violation. What we generate in this case is:
354 -- instantiation error at ...
355 -- original error message
359 -- warning: in instantiation at
360 -- warning: original warning message
362 -- All these messages are posted at the location of the top level
363 -- instantiation. If there are nested instantiations, then the
364 -- instantiation error message can be repeated, pointing to each
365 -- of the relevant instantiations.
367 -- Note: the instantiation mechanism is also shared for inlining
368 -- of subprogram bodies when front end inlining is done. In this
369 -- case the messages have the form:
371 -- in inlined body at ...
372 -- original error message
376 -- warning: in inlined body at
377 -- warning: original warning message
379 -- OK, this is the case where we have an instantiation error, and
380 -- we need to generate the error on the instantiation, rather than
384 Actual_Error_Loc : Source_Ptr;
385 -- Location of outer level instantiation in instantiation case, or
386 -- just a copy of Flag_Location in the normal case. This is the
387 -- location where all error messages will actually be posted.
389 Save_Error_Msg_Sloc : constant Source_Ptr := Error_Msg_Sloc;
390 -- Save possible location set for caller's message. We need to
391 -- use Error_Msg_Sloc for the location of the instantiation error
392 -- but we have to preserve a possible original value.
394 X : Source_File_Index;
396 Msg_Cont_Status : Boolean;
397 -- Used to label continuation lines in instantiation case with
398 -- proper Msg_Cont status.
401 -- Loop to find highest level instantiation, where all error
402 -- messages will be placed.
406 Actual_Error_Loc := Instantiation (X);
407 X := Get_Source_File_Index (Actual_Error_Loc);
408 exit when Instantiation (X) = No_Location;
411 -- Since we are generating the messages at the instantiation
412 -- point in any case, we do not want the references to the
413 -- bad lines in the instance to be annotated with the location
414 -- of the instantiation.
416 Suppress_Instance_Location := True;
417 Msg_Cont_Status := False;
419 -- Loop to generate instantiation messages
421 Error_Msg_Sloc := Flag_Location;
422 X := Get_Source_File_Index (Flag_Location);
424 while Instantiation (X) /= No_Location loop
426 -- Suppress instantiation message on continuation lines
428 if Msg (Msg'First) /= '\' then
430 -- Case of inlined body
432 if Inlined_Body (X) then
433 if Is_Warning_Msg then
435 ("?in inlined body #",
436 Actual_Error_Loc, Flag_Location, Msg_Cont_Status);
440 ("error in inlined body #",
441 Actual_Error_Loc, Flag_Location, Msg_Cont_Status);
444 -- Case of generic instantiation
447 if Is_Warning_Msg then
449 ("?in instantiation #",
450 Actual_Error_Loc, Flag_Location, Msg_Cont_Status);
454 ("instantiation error #",
455 Actual_Error_Loc, Flag_Location, Msg_Cont_Status);
460 Error_Msg_Sloc := Instantiation (X);
461 X := Get_Source_File_Index (Error_Msg_Sloc);
462 Msg_Cont_Status := True;
465 Suppress_Instance_Location := False;
466 Error_Msg_Sloc := Save_Error_Msg_Sloc;
468 -- Here we output the original message on the outer instantiation
471 (Msg, Actual_Error_Loc, Flag_Location, Msg_Cont_Status);
479 procedure Error_Msg_AP (Msg : String) is
484 -- If we had saved the Scan_Ptr value after scanning the previous
485 -- token, then we would have exactly the right place for putting
486 -- the flag immediately at hand. However, that would add at least
487 -- two instructions to a Scan call *just* to service the possibility
488 -- of an Error_Msg_AP call. So instead we reconstruct that value.
490 -- We have two possibilities, start with Prev_Token_Ptr and skip over
491 -- the current token, which is made harder by the possibility that this
492 -- token may be in error, or start with Token_Ptr and work backwards.
493 -- We used to take the second approach, but it's hard because of
494 -- comments, and harder still because things that look like comments
495 -- can appear inside strings. So now we take the first approach.
497 -- Note: in the case where there is no previous token, Prev_Token_Ptr
498 -- is set to Source_First, which is a reasonable position for the
499 -- error flag in this situation.
501 S1 := Prev_Token_Ptr;
504 -- If the previous token is a string literal, we need a special approach
505 -- since there may be white space inside the literal and we don't want
506 -- to stop on that white space.
508 -- Note: since this is an error recovery issue anyway, it is not worth
509 -- worrying about special UTF_32 line terminator characters here.
511 if Prev_Token = Tok_String_Literal then
515 if Source (S1) = C then
517 exit when Source (S1) /= C;
518 elsif Source (S1) in Line_Terminator then
523 -- Character literal also needs special handling
525 elsif Prev_Token = Tok_Char_Literal then
528 -- Otherwise we search forward for the end of the current token, marked
529 -- by a line terminator, white space, a comment symbol or if we bump
530 -- into the following token (i.e. the current token).
532 -- Again, it is not worth worrying about UTF_32 special line terminator
533 -- characters in this context, since this is only for error recovery.
536 while Source (S1) not in Line_Terminator
537 and then Source (S1) /= ' '
538 and then Source (S1) /= ASCII.HT
539 and then (Source (S1) /= '-' or else Source (S1 + 1) /= '-')
540 and then S1 /= Token_Ptr
546 -- S1 is now set to the location for the flag
555 procedure Error_Msg_BC (Msg : String) is
557 -- If we are at end of file, post the flag after the previous token
559 if Token = Tok_EOF then
562 -- If we are at start of file, post the flag at the current token
564 elsif Token_Ptr = Source_First (Current_Source_File) then
567 -- If the character before the current token is a space or a horizontal
568 -- tab, then we place the flag on this character (in the case of a tab
569 -- we would really like to place it in the "last" character of the tab
570 -- space, but that it too much trouble to worry about).
572 elsif Source (Token_Ptr - 1) = ' '
573 or else Source (Token_Ptr - 1) = ASCII.HT
575 Error_Msg (Msg, Token_Ptr - 1);
577 -- If there is no space or tab before the current token, then there is
578 -- no room to place the flag before the token, so we place it on the
579 -- token instead (this happens for example at the start of a line).
582 Error_Msg (Msg, Token_Ptr);
590 procedure Error_Msg_CRT (Feature : String; N : Node_Id) is
591 CNRT : constant String := " not allowed in no run time mode";
592 CCRT : constant String := " not supported by configuration>";
594 S : String (1 .. Feature'Length + 1 + CCRT'Length);
599 S (2 .. Feature'Length + 1) := Feature;
600 L := Feature'Length + 2;
602 if No_Run_Time_Mode then
603 S (L .. L + CNRT'Length - 1) := CNRT;
604 L := L + CNRT'Length - 1;
606 else pragma Assert (Configurable_Run_Time_Mode);
607 S (L .. L + CCRT'Length - 1) := CCRT;
608 L := L + CCRT'Length - 1;
611 Error_Msg_N (S (1 .. L), N);
612 Configurable_Run_Time_Violations := Configurable_Run_Time_Violations + 1;
619 procedure Error_Msg_F (Msg : String; N : Node_Id) is
621 Error_Msg_NEL (Msg, N, N, Sloc (First_Node (N)));
628 procedure Error_Msg_FE
631 E : Node_Or_Entity_Id)
634 Error_Msg_NEL (Msg, N, E, Sloc (First_Node (N)));
637 ------------------------
638 -- Error_Msg_Internal --
639 ------------------------
641 procedure Error_Msg_Internal
647 Next_Msg : Error_Msg_Id;
648 -- Pointer to next message at insertion point
650 Prev_Msg : Error_Msg_Id;
651 -- Pointer to previous message at insertion point
653 Temp_Msg : Error_Msg_Id;
655 procedure Handle_Serious_Error;
656 -- Internal procedure to do all error message handling for a serious
657 -- error message, other than bumping the error counts and arranging
658 -- for the message to be output.
660 --------------------------
661 -- Handle_Serious_Error --
662 --------------------------
664 procedure Handle_Serious_Error is
666 -- Turn off code generation if not done already
668 if Operating_Mode = Generate_Code then
669 Operating_Mode := Check_Semantics;
670 Expander_Active := False;
673 -- Set the fatal error flag in the unit table unless we are
674 -- in Try_Semantics mode. This stops the semantics from being
675 -- performed if we find a serious error. This is skipped if we
676 -- are currently dealing with the configuration pragma file.
679 and then Current_Source_Unit /= No_Unit
681 Set_Fatal_Error (Get_Source_Unit (Sptr));
683 end Handle_Serious_Error;
685 -- Start of processing for Error_Msg_Internal
688 if Raise_Exception_On_Error /= 0 then
689 raise Error_Msg_Exception;
692 Continuation := Msg_Cont;
693 Continuation_New_Line := False;
694 Suppress_Message := False;
695 Kill_Message := False;
696 Set_Msg_Text (Msg, Sptr);
698 -- Kill continuation if parent message killed
700 if Continuation and Last_Killed then
704 -- Return without doing anything if message is suppressed
707 and not All_Errors_Mode
708 and not (Msg (Msg'Last) = '!')
709 and not Is_Warning_Msg
711 if not Continuation then
718 -- Return without doing anything if message is killed and this
719 -- is not the first error message. The philosophy is that if we
720 -- get a weird error message and we already have had a message,
721 -- then we hope the weird message is a junk cascaded message
724 and then not All_Errors_Mode
725 and then Total_Errors_Detected /= 0
727 if not Continuation then
734 -- Special check for warning message to see if it should be output
736 if Is_Warning_Msg then
738 -- Immediate return if warning message and warnings are suppressed
740 if Warnings_Suppressed (Optr)
741 or else Warnings_Suppressed (Sptr)
743 Cur_Msg := No_Error_Msg;
747 -- If the flag location is in the main extended source unit
748 -- then for sure we want the warning since it definitely belongs
750 if In_Extended_Main_Source_Unit (Sptr) then
753 -- If the flag location is not in the main extended source unit,
754 -- then we want to eliminate the warning, unless it is in the
755 -- extended main code unit and we want warnings on the instance.
757 elsif In_Extended_Main_Code_Unit (Sptr)
758 and then Warn_On_Instance
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
823 elsif Msglen > 6 and then Msg_Buffer (1 .. 6) = "info: " then
829 -- Now deal with separation between messages. Normally this
830 -- is simply comma space, but there are some special cases.
832 -- If continuation new line, then put actual NL character in msg
834 if Continuation_New_Line then
836 Newm (Newl) := ASCII.LF;
838 -- If continuation message is enclosed in parentheses, then
839 -- special treatment (don't need a comma, and we want to combine
840 -- successive parenthetical remarks into a single one with
841 -- separating commas).
843 elsif Msg_Buffer (M) = '(' and then Msg_Buffer (Msglen) = ')' then
845 -- Case where existing message ends in right paren, remove
846 -- and separate parenthetical remarks with a comma.
848 if Newm (Newl) = ')' then
850 Msg_Buffer (M) := ' ';
852 -- Case where we are adding new parenthetical comment
859 -- Case where continuation not in parens and no new line
862 Newm (Newl + 1 .. Newl + 2) := ", ";
866 -- Append new message
868 Newm (Newl + 1 .. Newl + Msglen - M + 1) :=
869 Msg_Buffer (M .. Msglen);
870 Newl := Newl + Msglen - M + 1;
871 Errors.Table (Cur_Msg).Text := new String'(Newm (1 .. Newl));
877 -- Otherwise build error message object for new message
879 Errors.Increment_Last;
880 Cur_Msg := Errors.Last;
881 Errors.Table (Cur_Msg).Text := new String'(Msg_Buffer (1 .. Msglen));
882 Errors.Table (Cur_Msg).Next := No_Error_Msg;
883 Errors.Table (Cur_Msg).Sptr := Sptr;
884 Errors.Table (Cur_Msg).Optr := Optr;
885 Errors.Table (Cur_Msg).Sfile := Get_Source_File_Index (Sptr);
886 Errors.Table (Cur_Msg).Line := Get_Physical_Line_Number (Sptr);
887 Errors.Table (Cur_Msg).Col := Get_Column_Number (Sptr);
888 Errors.Table (Cur_Msg).Warn := Is_Warning_Msg;
889 Errors.Table (Cur_Msg).Style := Is_Style_Msg;
890 Errors.Table (Cur_Msg).Serious := Is_Serious_Error;
891 Errors.Table (Cur_Msg).Uncond := Is_Unconditional_Msg;
892 Errors.Table (Cur_Msg).Msg_Cont := Continuation;
893 Errors.Table (Cur_Msg).Deleted := False;
895 -- If immediate errors mode set, output error message now. Also output
896 -- now if the -d1 debug flag is set (so node number message comes out
897 -- just before actual error message)
899 if Debug_Flag_OO or else Debug_Flag_1 then
902 (Errors.Table (Cur_Msg).Line, Errors.Table (Cur_Msg).Sfile, True);
904 Output_Error_Msgs (Temp_Msg);
906 -- If not in immediate errors mode, then we insert the message in the
907 -- error chain for later output by Finalize. The messages are sorted
908 -- first by unit (main unit comes first), and within a unit by source
909 -- location (earlier flag location first in the chain).
912 -- First a quick check, does this belong at the very end of the chain
913 -- of error messages. This saves a lot of time in the normal case if
914 -- there are lots of messages.
916 if Last_Error_Msg /= No_Error_Msg
917 and then Errors.Table (Cur_Msg).Sfile =
918 Errors.Table (Last_Error_Msg).Sfile
919 and then (Sptr > Errors.Table (Last_Error_Msg).Sptr
921 (Sptr = Errors.Table (Last_Error_Msg).Sptr
923 Optr > Errors.Table (Last_Error_Msg).Optr))
925 Prev_Msg := Last_Error_Msg;
926 Next_Msg := No_Error_Msg;
928 -- Otherwise do a full sequential search for the insertion point
931 Prev_Msg := No_Error_Msg;
932 Next_Msg := First_Error_Msg;
933 while Next_Msg /= No_Error_Msg loop
935 Errors.Table (Cur_Msg).Sfile < Errors.Table (Next_Msg).Sfile;
937 if Errors.Table (Cur_Msg).Sfile =
938 Errors.Table (Next_Msg).Sfile
940 exit when Sptr < Errors.Table (Next_Msg).Sptr
942 (Sptr = Errors.Table (Next_Msg).Sptr
944 Optr < Errors.Table (Next_Msg).Optr);
947 Prev_Msg := Next_Msg;
948 Next_Msg := Errors.Table (Next_Msg).Next;
952 -- Now we insert the new message in the error chain. The insertion
953 -- point for the message is after Prev_Msg and before Next_Msg.
955 -- The possible insertion point for the new message is after Prev_Msg
956 -- and before Next_Msg. However, this is where we do a special check
957 -- for redundant parsing messages, defined as messages posted on the
958 -- same line. The idea here is that probably such messages are junk
959 -- from the parser recovering. In full errors mode, we don't do this
960 -- deletion, but otherwise such messages are discarded at this stage.
962 if Prev_Msg /= No_Error_Msg
963 and then Errors.Table (Prev_Msg).Line =
964 Errors.Table (Cur_Msg).Line
965 and then Errors.Table (Prev_Msg).Sfile =
966 Errors.Table (Cur_Msg).Sfile
967 and then Compiler_State = Parsing
968 and then not All_Errors_Mode
970 -- Don't delete unconditional messages and at this stage, don't
971 -- delete continuation lines (we attempted to delete those earlier
972 -- if the parent message was deleted.
974 if not Errors.Table (Cur_Msg).Uncond
975 and then not Continuation
977 -- Don't delete if prev msg is warning and new msg is an error.
978 -- This is because we don't want a real error masked by a
979 -- warning. In all other cases (that is parse errors for the
980 -- same line that are not unconditional) we do delete the
981 -- message. This helps to avoid junk extra messages from
982 -- cascaded parsing errors
984 if not (Errors.Table (Prev_Msg).Warn
986 Errors.Table (Prev_Msg).Style)
988 (Errors.Table (Cur_Msg).Warn
990 Errors.Table (Cur_Msg).Style)
992 -- All tests passed, delete the message by simply returning
993 -- without any further processing.
995 if not Continuation then
1004 -- Come here if message is to be inserted in the error chain
1006 if not Continuation then
1007 Last_Killed := False;
1010 if Prev_Msg = No_Error_Msg then
1011 First_Error_Msg := Cur_Msg;
1013 Errors.Table (Prev_Msg).Next := Cur_Msg;
1016 Errors.Table (Cur_Msg).Next := Next_Msg;
1018 if Next_Msg = No_Error_Msg then
1019 Last_Error_Msg := Cur_Msg;
1023 -- Bump appropriate statistics count
1025 if Errors.Table (Cur_Msg).Warn or Errors.Table (Cur_Msg).Style then
1026 Warnings_Detected := Warnings_Detected + 1;
1029 Total_Errors_Detected := Total_Errors_Detected + 1;
1031 if Errors.Table (Cur_Msg).Serious then
1032 Serious_Errors_Detected := Serious_Errors_Detected + 1;
1033 Handle_Serious_Error;
1037 -- Terminate if max errors reached
1039 if Total_Errors_Detected + Warnings_Detected = Maximum_Errors then
1040 raise Unrecoverable_Error;
1042 end Error_Msg_Internal;
1048 procedure Error_Msg_N (Msg : String; N : Node_Or_Entity_Id) is
1050 Error_Msg_NEL (Msg, N, N, Sloc (N));
1057 procedure Error_Msg_NE
1059 N : Node_Or_Entity_Id;
1060 E : Node_Or_Entity_Id)
1063 Error_Msg_NEL (Msg, N, E, Sloc (N));
1070 procedure Error_Msg_NEL
1072 N : Node_Or_Entity_Id;
1073 E : Node_Or_Entity_Id;
1074 Flag_Location : Source_Ptr)
1077 if Special_Msg_Delete (Msg, N, E) then
1081 Test_Style_Warning_Serious_Msg (Msg);
1083 -- Special handling for warning messages
1085 if Is_Warning_Msg then
1087 -- Suppress if no warnings set for either entity or node
1089 if No_Warnings (N) or else No_Warnings (E) then
1093 -- Suppress if inside loop that is known to be null
1100 while Present (P) loop
1101 if Nkind (P) = N_Loop_Statement and then Is_Null_Loop (P) then
1110 -- Test for message to be output
1113 or else Msg (Msg'Last) = '!'
1114 or else Is_Warning_Msg
1116 or else (Msg (Msg'First) = '\' and not Last_Killed)
1119 Error_Msg_Node_1 := E;
1120 Error_Msg (Msg, Flag_Location);
1123 Last_Killed := True;
1126 if not (Is_Warning_Msg or Is_Style_Msg) then
1135 procedure Error_Msg_NW
1138 N : Node_Or_Entity_Id)
1142 and then In_Extended_Main_Source_Unit (N)
1143 and then Comes_From_Source (N)
1145 Error_Msg_NEL (Msg, N, N, Sloc (N));
1153 procedure Error_Msg_S (Msg : String) is
1155 Error_Msg (Msg, Scan_Ptr);
1162 procedure Error_Msg_SC (Msg : String) is
1164 -- If we are at end of file, post the flag after the previous token
1166 if Token = Tok_EOF then
1169 -- For all other cases the message is posted at the current token
1173 Error_Msg (Msg, Token_Ptr);
1181 procedure Error_Msg_SP (Msg : String) is
1183 -- Note: in the case where there is no previous token, Prev_Token_Ptr
1184 -- is set to Source_First, which is a reasonable position for the
1185 -- error flag in this situation
1187 Error_Msg (Msg, Prev_Token_Ptr);
1194 procedure Finalize (Last_Call : Boolean) is
1200 -- Eliminate any duplicated error messages from the list. This is
1201 -- done after the fact to avoid problems with Change_Error_Text.
1203 Cur := First_Error_Msg;
1204 while Cur /= No_Error_Msg loop
1205 Nxt := Errors.Table (Cur).Next;
1208 while F /= No_Error_Msg
1209 and then Errors.Table (F).Sptr = Errors.Table (Cur).Sptr
1211 Check_Duplicate_Message (Cur, F);
1212 F := Errors.Table (F).Next;
1218 -- Mark any messages suppressed by specific warnings as Deleted
1220 Cur := First_Error_Msg;
1221 while Cur /= No_Error_Msg loop
1222 if not Errors.Table (Cur).Deleted
1223 and then Warning_Specifically_Suppressed
1224 (Errors.Table (Cur).Sptr,
1225 Errors.Table (Cur).Text)
1227 Errors.Table (Cur).Deleted := True;
1228 Warnings_Detected := Warnings_Detected - 1;
1231 Cur := Errors.Table (Cur).Next;
1234 Finalize_Called := True;
1236 -- Check consistency of specific warnings (may add warnings). We only
1237 -- do this on the last call, after all possible warnings are posted.
1240 Validate_Specific_Warnings (Error_Msg'Access);
1248 function First_Node (C : Node_Id) return Node_Id is
1249 L : constant Source_Ptr := Sloc (Original_Node (C));
1250 Sfile : constant Source_File_Index := Get_Source_File_Index (L);
1254 function Test_Earlier (N : Node_Id) return Traverse_Result;
1255 -- Function applied to every node in the construct
1257 procedure Search_Tree_First is new Traverse_Proc (Test_Earlier);
1258 -- Create traversal procedure
1264 function Test_Earlier (N : Node_Id) return Traverse_Result is
1265 Loc : constant Source_Ptr := Sloc (Original_Node (N));
1268 -- Check for earlier. The tests for being in the same file ensures
1269 -- against strange cases of foreign code somehow being present. We
1270 -- don't want wild placement of messages if that happens, so it is
1271 -- best to just ignore this situation.
1274 and then Get_Source_File_Index (Loc) = Sfile
1276 Earliest := Original_Node (N);
1283 -- Start of processing for First_Node
1286 Earliest := Original_Node (C);
1287 Eloc := Sloc (Earliest);
1288 Search_Tree_First (Original_Node (C));
1296 function First_Sloc (N : Node_Id) return Source_Ptr is
1297 SI : constant Source_File_Index := Source_Index (Get_Source_Unit (N));
1298 SF : constant Source_Ptr := Source_First (SI);
1303 F := First_Node (N);
1306 -- The following circuit is a bit subtle. When we have parenthesized
1307 -- expressions, then the Sloc will not record the location of the
1308 -- paren, but we would like to post the flag on the paren. So what
1309 -- we do is to crawl up the tree from the First_Node, adjusting the
1310 -- Sloc value for any parentheses we know are present. Yes, we know
1311 -- this circuit is not 100% reliable (e.g. because we don't record
1312 -- all possible paren level values), but this is only for an error
1313 -- message so it is good enough.
1316 Paren_Loop : for J in 1 .. Paren_Count (F) loop
1318 -- We don't look more than 12 characters behind the current
1319 -- location, and in any case not past the front of the source.
1321 Search_Loop : for K in 1 .. 12 loop
1322 exit Search_Loop when S = SF;
1324 if Source_Text (SI) (S - 1) = '(' then
1328 elsif Source_Text (SI) (S - 1) <= ' ' then
1334 end loop Search_Loop;
1335 end loop Paren_Loop;
1337 exit Node_Loop when F = N;
1339 exit Node_Loop when Nkind (F) not in N_Subexpr;
1349 procedure Initialize is
1352 First_Error_Msg := No_Error_Msg;
1353 Last_Error_Msg := No_Error_Msg;
1354 Serious_Errors_Detected := 0;
1355 Total_Errors_Detected := 0;
1356 Warnings_Detected := 0;
1357 Cur_Msg := No_Error_Msg;
1360 -- Initialize warnings table, if all warnings are suppressed, supply
1361 -- an initial dummy entry covering all possible source locations.
1364 Specific_Warnings.Init;
1366 if Warning_Mode = Suppress then
1367 Warnings.Increment_Last;
1368 Warnings.Table (Warnings.Last).Start := Source_Ptr'First;
1369 Warnings.Table (Warnings.Last).Stop := Source_Ptr'Last;
1377 function No_Warnings (N : Node_Or_Entity_Id) return Boolean is
1379 if Error_Posted (N) then
1382 elsif Nkind (N) in N_Entity and then Has_Warnings_Off (N) then
1385 elsif Is_Entity_Name (N)
1386 and then Present (Entity (N))
1387 and then Has_Warnings_Off (Entity (N))
1400 function OK_Node (N : Node_Id) return Boolean is
1401 K : constant Node_Kind := Nkind (N);
1404 if Error_Posted (N) then
1407 elsif K in N_Has_Etype
1408 and then Present (Etype (N))
1409 and then Error_Posted (Etype (N))
1414 or else K = N_Attribute_Reference
1415 or else K = N_Character_Literal
1416 or else K = N_Expanded_Name
1417 or else K = N_Identifier
1418 or else K = N_Operator_Symbol)
1419 and then Present (Entity (N))
1420 and then Error_Posted (Entity (N))
1428 ---------------------
1429 -- Output_Messages --
1430 ---------------------
1432 procedure Output_Messages is
1436 procedure Write_Error_Summary;
1437 -- Write error summary
1439 procedure Write_Header (Sfile : Source_File_Index);
1440 -- Write header line (compiling or checking given file)
1442 procedure Write_Max_Errors;
1443 -- Write message if max errors reached
1445 -------------------------
1446 -- Write_Error_Summary --
1447 -------------------------
1449 procedure Write_Error_Summary is
1451 -- Extra blank line if error messages or source listing were output
1453 if Total_Errors_Detected + Warnings_Detected > 0
1459 -- Message giving number of lines read and number of errors detected.
1460 -- This normally goes to Standard_Output. The exception is when brief
1461 -- mode is not set, verbose mode (or full list mode) is set, and
1462 -- there are errors. In this case we send the message to standard
1463 -- error to make sure that *something* appears on standard error in
1464 -- an error situation.
1466 -- Formerly, only the "# errors" suffix was sent to stderr, whereas
1467 -- "# lines:" appeared on stdout. This caused problems on VMS when
1468 -- the stdout buffer was flushed, giving an extra line feed after
1471 if Total_Errors_Detected + Warnings_Detected /= 0
1472 and then not Brief_Output
1473 and then (Verbose_Mode or Full_List)
1478 -- Message giving total number of lines
1481 Write_Int (Num_Source_Lines (Main_Source_File));
1483 if Num_Source_Lines (Main_Source_File) = 1 then
1484 Write_Str (" line: ");
1486 Write_Str (" lines: ");
1489 if Total_Errors_Detected = 0 then
1490 Write_Str ("No errors");
1492 elsif Total_Errors_Detected = 1 then
1493 Write_Str ("1 error");
1496 Write_Int (Total_Errors_Detected);
1497 Write_Str (" errors");
1500 if Warnings_Detected /= 0 then
1502 Write_Int (Warnings_Detected);
1503 Write_Str (" warning");
1505 if Warnings_Detected /= 1 then
1509 if Warning_Mode = Treat_As_Error then
1510 Write_Str (" (treated as error");
1512 if Warnings_Detected /= 1 then
1521 Set_Standard_Output;
1522 end Write_Error_Summary;
1528 procedure Write_Header (Sfile : Source_File_Index) is
1530 if Verbose_Mode or Full_List then
1531 if Original_Operating_Mode = Generate_Code then
1532 Write_Str ("Compiling: ");
1534 Write_Str ("Checking: ");
1537 Write_Name (Full_File_Name (Sfile));
1539 if not Debug_Flag_7 then
1540 Write_Str (" (source file time stamp: ");
1541 Write_Time_Stamp (Sfile);
1549 ----------------------
1550 -- Write_Max_Errors --
1551 ----------------------
1553 procedure Write_Max_Errors is
1555 if Maximum_Errors /= 0
1556 and then Total_Errors_Detected + Warnings_Detected = Maximum_Errors
1559 Write_Str ("fatal error: maximum errors reached");
1561 Set_Standard_Output;
1563 end Write_Max_Errors;
1565 -- Start of processing for Output_Messages
1568 -- Error if Finalize has not been called
1570 if not Finalize_Called then
1571 raise Program_Error;
1574 -- Reset current error source file if the main unit has a pragma
1575 -- Source_Reference. This ensures outputting the proper name of
1576 -- the source file in this situation.
1578 if Main_Source_File = No_Source_File
1579 or else Num_SRef_Pragmas (Main_Source_File) /= 0
1581 Current_Error_Source_File := No_Source_File;
1586 if Brief_Output or (not Full_List and not Verbose_Mode) then
1589 E := First_Error_Msg;
1590 while E /= No_Error_Msg loop
1591 if not Errors.Table (E).Deleted and then not Debug_Flag_KK then
1592 if Full_Path_Name_For_Brief_Errors then
1593 Write_Name (Full_Ref_Name (Errors.Table (E).Sfile));
1595 Write_Name (Reference_Name (Errors.Table (E).Sfile));
1599 Write_Int (Int (Physical_To_Logical
1600 (Errors.Table (E).Line,
1601 Errors.Table (E).Sfile)));
1604 if Errors.Table (E).Col < 10 then
1608 Write_Int (Int (Errors.Table (E).Col));
1610 Output_Msg_Text (E);
1614 E := Errors.Table (E).Next;
1617 Set_Standard_Output;
1620 -- Full source listing case
1623 List_Pragmas_Index := 1;
1624 List_Pragmas_Mode := True;
1625 E := First_Error_Msg;
1627 -- Normal case, to stdout (copyright notice already output)
1629 if Full_List_File_Name = null then
1630 if not Debug_Flag_7 then
1637 Create_List_File_Access.all (Full_List_File_Name.all);
1638 Set_Special_Output (Write_List_Info_Access.all'Access);
1640 -- Write copyright notice to file
1642 if not Debug_Flag_7 then
1643 Write_Str ("GNAT ");
1644 Write_Str (Gnat_Version_String);
1646 Write_Str ("Copyright 1992-" &
1648 ", Free Software Foundation, Inc.");
1653 -- First list extended main source file units with errors
1655 -- Note: if debug flag d.m is set, only the main source is listed
1657 for U in Main_Unit .. Last_Unit loop
1658 if In_Extended_Main_Source_Unit (Cunit_Entity (U))
1659 and then (U = Main_Unit or else not Debug_Flag_Dot_M)
1662 Sfile : constant Source_File_Index := Source_Index (U);
1666 Write_Header (Sfile);
1669 -- Normally, we don't want an "error messages from file"
1670 -- message when listing the entire file, so we set the
1671 -- current source file as the current error source file.
1672 -- However, the old style of doing things was to list this
1673 -- message if pragma Source_Reference is present, even for
1674 -- the main unit. Since the purpose of the -gnatd.m switch
1675 -- is to duplicate the old behavior, we skip the reset if
1676 -- this debug flag is set.
1678 if not Debug_Flag_Dot_M then
1679 Current_Error_Source_File := Sfile;
1682 for N in 1 .. Last_Source_Line (Sfile) loop
1683 while E /= No_Error_Msg
1684 and then Errors.Table (E).Deleted
1686 E := Errors.Table (E).Next;
1691 and then Errors.Table (E).Line = N
1692 and then Errors.Table (E).Sfile = Sfile;
1694 Output_Source_Line (N, Sfile, Err_Flag);
1697 Output_Error_Msgs (E);
1699 if not Debug_Flag_2 then
1708 -- Then output errors, if any, for subsidiary units not in the
1709 -- main extended unit.
1711 -- Note: if debug flag d.m set, include errors for any units other
1712 -- than the main unit in the extended source unit (e.g. spec and
1713 -- subunits for a body).
1715 while E /= No_Error_Msg
1716 and then (not In_Extended_Main_Source_Unit (Errors.Table (E).Sptr)
1719 and then Get_Source_Unit
1720 (Errors.Table (E).Sptr) /= Main_Unit))
1722 if Errors.Table (E).Deleted then
1723 E := Errors.Table (E).Next;
1728 (Errors.Table (E).Line, Errors.Table (E).Sfile, True);
1729 Output_Error_Msgs (E);
1733 -- If output to file, write extra copy of error summary to the
1734 -- output file, and then close it.
1736 if Full_List_File_Name /= null then
1737 Write_Error_Summary;
1739 Close_List_File_Access.all;
1740 Cancel_Special_Output;
1744 -- Verbose mode (error lines only with error flags). Normally this is
1745 -- ignored in full list mode, unless we are listing to a file, in which
1746 -- case we still generate -gnatv output to standard output.
1749 and then (not Full_List or else Full_List_File_Name /= null)
1752 Write_Header (Main_Source_File);
1753 E := First_Error_Msg;
1755 -- Loop through error lines
1757 while E /= No_Error_Msg loop
1758 if Errors.Table (E).Deleted then
1759 E := Errors.Table (E).Next;
1763 (Errors.Table (E).Line, Errors.Table (E).Sfile, True);
1764 Output_Error_Msgs (E);
1769 -- Output error summary if verbose or full list mode
1771 if Verbose_Mode or else Full_List then
1772 Write_Error_Summary;
1777 if Warning_Mode = Treat_As_Error then
1778 Total_Errors_Detected := Total_Errors_Detected + Warnings_Detected;
1779 Warnings_Detected := 0;
1781 end Output_Messages;
1783 ------------------------
1784 -- Output_Source_Line --
1785 ------------------------
1787 procedure Output_Source_Line
1788 (L : Physical_Line_Number;
1789 Sfile : Source_File_Index;
1795 Line_Number_Output : Boolean := False;
1796 -- Set True once line number is output
1798 Empty_Line : Boolean := True;
1799 -- Set False if line includes at least one character
1802 if Sfile /= Current_Error_Source_File then
1803 Write_Str ("==============Error messages for ");
1805 case Sinput.File_Type (Sfile) is
1807 Write_Str ("source");
1809 when Sinput.Config =>
1810 Write_Str ("configuration pragmas");
1813 Write_Str ("symbol definition");
1815 when Sinput.Preproc =>
1816 Write_Str ("preprocessing data");
1819 Write_Str (" file: ");
1820 Write_Name (Full_File_Name (Sfile));
1823 if Num_SRef_Pragmas (Sfile) > 0 then
1824 Write_Str ("--------------Line numbers from file: ");
1825 Write_Name (Full_Ref_Name (Sfile));
1826 Write_Str (" (starting at line ");
1827 Write_Int (Int (First_Mapped_Line (Sfile)));
1832 Current_Error_Source_File := Sfile;
1835 if Errs or List_Pragmas_Mode then
1836 Output_Line_Number (Physical_To_Logical (L, Sfile));
1837 Line_Number_Output := True;
1840 S := Line_Start (L, Sfile);
1843 C := Source_Text (Sfile) (S);
1844 exit when C = ASCII.LF or else C = ASCII.CR or else C = EOF;
1846 -- Deal with matching entry in List_Pragmas table
1849 and then List_Pragmas_Index <= List_Pragmas.Last
1850 and then S = List_Pragmas.Table (List_Pragmas_Index).Ploc
1852 case List_Pragmas.Table (List_Pragmas_Index).Ptyp is
1856 -- Ignore if on line with errors so that error flags
1857 -- get properly listed with the error line .
1860 Write_Char (ASCII.FF);
1864 List_Pragmas_Mode := True;
1866 if not Line_Number_Output then
1867 Output_Line_Number (Physical_To_Logical (L, Sfile));
1868 Line_Number_Output := True;
1875 List_Pragmas_Mode := False;
1878 List_Pragmas_Index := List_Pragmas_Index + 1;
1880 -- Normal case (no matching entry in List_Pragmas table)
1883 if Errs or List_Pragmas_Mode then
1888 Empty_Line := False;
1892 -- If we have output a source line, then add the line terminator, with
1893 -- training spaces preserved (so we output the line exactly as input).
1895 if Line_Number_Output then
1899 Write_Eol_Keep_Blanks;
1902 end Output_Source_Line;
1904 -----------------------------
1905 -- Remove_Warning_Messages --
1906 -----------------------------
1908 procedure Remove_Warning_Messages (N : Node_Id) is
1910 function Check_For_Warning (N : Node_Id) return Traverse_Result;
1911 -- This function checks one node for a possible warning message
1913 function Check_All_Warnings is new Traverse_Func (Check_For_Warning);
1914 -- This defines the traversal operation
1916 -----------------------
1917 -- Check_For_Warning --
1918 -----------------------
1920 function Check_For_Warning (N : Node_Id) return Traverse_Result is
1921 Loc : constant Source_Ptr := Sloc (N);
1924 function To_Be_Removed (E : Error_Msg_Id) return Boolean;
1925 -- Returns True for a message that is to be removed. Also adjusts
1926 -- warning count appropriately.
1932 function To_Be_Removed (E : Error_Msg_Id) return Boolean is
1934 if E /= No_Error_Msg
1936 -- Don't remove if location does not match
1938 and then Errors.Table (E).Optr = Loc
1940 -- Don't remove if not warning/info message. Note that we do
1941 -- not remove style messages here. They are warning messages
1942 -- but not ones we want removed in this context.
1944 and then Errors.Table (E).Warn
1946 -- Don't remove unconditional messages
1948 and then not Errors.Table (E).Uncond
1950 Warnings_Detected := Warnings_Detected - 1;
1953 -- No removal required
1960 -- Start of processing for Check_For_Warnings
1963 while To_Be_Removed (First_Error_Msg) loop
1964 First_Error_Msg := Errors.Table (First_Error_Msg).Next;
1967 if First_Error_Msg = No_Error_Msg then
1968 Last_Error_Msg := No_Error_Msg;
1971 E := First_Error_Msg;
1972 while E /= No_Error_Msg loop
1973 while To_Be_Removed (Errors.Table (E).Next) loop
1974 Errors.Table (E).Next :=
1975 Errors.Table (Errors.Table (E).Next).Next;
1977 if Errors.Table (E).Next = No_Error_Msg then
1978 Last_Error_Msg := E;
1982 E := Errors.Table (E).Next;
1985 if Nkind (N) = N_Raise_Constraint_Error
1986 and then Original_Node (N) /= N
1987 and then No (Condition (N))
1989 -- Warnings may have been posted on subexpressions of the original
1990 -- tree. We place the original node back on the tree to remove
1991 -- those warnings, whose sloc do not match those of any node in
1992 -- the current tree. Given that we are in unreachable code, this
1993 -- modification to the tree is harmless.
1996 Status : Traverse_Final_Result;
1999 if Is_List_Member (N) then
2000 Set_Condition (N, Original_Node (N));
2001 Status := Check_All_Warnings (Condition (N));
2003 Rewrite (N, Original_Node (N));
2004 Status := Check_All_Warnings (N);
2013 end Check_For_Warning;
2015 -- Start of processing for Remove_Warning_Messages
2018 if Warnings_Detected /= 0 then
2020 Discard : Traverse_Final_Result;
2021 pragma Warnings (Off, Discard);
2024 Discard := Check_All_Warnings (N);
2027 end Remove_Warning_Messages;
2029 procedure Remove_Warning_Messages (L : List_Id) is
2032 if Is_Non_Empty_List (L) then
2034 while Present (Stat) loop
2035 Remove_Warning_Messages (Stat);
2039 end Remove_Warning_Messages;
2041 ---------------------------
2042 -- Set_Identifier_Casing --
2043 ---------------------------
2045 procedure Set_Identifier_Casing
2046 (Identifier_Name : System.Address;
2047 File_Name : System.Address)
2049 Ident : constant Big_String_Ptr := To_Big_String_Ptr (Identifier_Name);
2050 File : constant Big_String_Ptr := To_Big_String_Ptr (File_Name);
2053 Desired_Case : Casing_Type := Mixed_Case;
2054 -- Casing required for result. Default value of Mixed_Case is used if
2055 -- for some reason we cannot find the right file name in the table.
2058 -- Get length of file name
2061 while File (Flen + 1) /= ASCII.NUL loop
2065 -- Loop through file names to find matching one. This is a bit slow,
2066 -- but we only do it in error situations so it is not so terrible.
2067 -- Note that if the loop does not exit, then the desired case will
2068 -- be left set to Mixed_Case, this can happen if the name was not
2069 -- in canonical form, and gets canonicalized on VMS. Possibly we
2070 -- could fix this by unconditinally canonicalizing these names ???
2072 for J in 1 .. Last_Source_File loop
2073 Get_Name_String (Full_Debug_Name (J));
2076 and then Name_Buffer (1 .. Name_Len) = String (File (1 .. Flen))
2078 Desired_Case := Identifier_Casing (J);
2083 -- Copy identifier as given to Name_Buffer
2085 for J in Name_Buffer'Range loop
2086 Name_Buffer (J) := Ident (J);
2088 if Name_Buffer (J) = ASCII.NUL then
2094 Set_Casing (Desired_Case);
2095 end Set_Identifier_Casing;
2097 -----------------------
2098 -- Set_Ignore_Errors --
2099 -----------------------
2101 procedure Set_Ignore_Errors (To : Boolean) is
2103 Errors_Must_Be_Ignored := To;
2104 end Set_Ignore_Errors;
2106 ------------------------------
2107 -- Set_Msg_Insertion_Column --
2108 ------------------------------
2110 procedure Set_Msg_Insertion_Column is
2112 if Style.RM_Column_Check then
2113 Set_Msg_Str (" in column ");
2114 Set_Msg_Int (Int (Error_Msg_Col) + 1);
2116 end Set_Msg_Insertion_Column;
2118 ----------------------------
2119 -- Set_Msg_Insertion_Node --
2120 ----------------------------
2122 procedure Set_Msg_Insertion_Node is
2127 Error_Msg_Node_1 = Error
2128 or else Error_Msg_Node_1 = Any_Type;
2130 if Error_Msg_Node_1 = Empty then
2131 Set_Msg_Blank_Conditional;
2132 Set_Msg_Str ("<empty>");
2134 elsif Error_Msg_Node_1 = Error then
2136 Set_Msg_Str ("<error>");
2138 elsif Error_Msg_Node_1 = Standard_Void_Type then
2140 Set_Msg_Str ("procedure name");
2143 Set_Msg_Blank_Conditional;
2147 K := Nkind (Error_Msg_Node_1);
2149 -- If we have operator case, skip quotes since name of operator
2150 -- itself will supply the required quotations. An operator can be
2151 -- an applied use in an expression or an explicit operator symbol,
2152 -- or an identifier whose name indicates it is an operator.
2155 or else K = N_Operator_Symbol
2156 or else K = N_Defining_Operator_Symbol
2157 or else ((K = N_Identifier or else K = N_Defining_Identifier)
2158 and then Is_Operator_Name (Chars (Error_Msg_Node_1)))
2160 Set_Msg_Node (Error_Msg_Node_1);
2162 -- Normal case, not an operator, surround with quotes
2166 Set_Qualification (Error_Msg_Qual_Level, Error_Msg_Node_1);
2167 Set_Msg_Node (Error_Msg_Node_1);
2172 -- The following assignment ensures that a second ampersand insertion
2173 -- character will correspond to the Error_Msg_Node_2 parameter. We
2174 -- suppress possible validity checks in case operating in -gnatVa mode,
2175 -- and Error_Msg_Node_2 is not needed and has not been set.
2178 pragma Suppress (Range_Check);
2180 Error_Msg_Node_1 := Error_Msg_Node_2;
2182 end Set_Msg_Insertion_Node;
2184 --------------------------------------
2185 -- Set_Msg_Insertion_Type_Reference --
2186 --------------------------------------
2188 procedure Set_Msg_Insertion_Type_Reference (Flag : Source_Ptr) is
2194 if Error_Msg_Node_1 = Standard_Void_Type then
2195 Set_Msg_Str ("package or procedure name");
2198 elsif Error_Msg_Node_1 = Standard_Exception_Type then
2199 Set_Msg_Str ("exception name");
2202 elsif Error_Msg_Node_1 = Any_Access
2203 or else Error_Msg_Node_1 = Any_Array
2204 or else Error_Msg_Node_1 = Any_Boolean
2205 or else Error_Msg_Node_1 = Any_Character
2206 or else Error_Msg_Node_1 = Any_Composite
2207 or else Error_Msg_Node_1 = Any_Discrete
2208 or else Error_Msg_Node_1 = Any_Fixed
2209 or else Error_Msg_Node_1 = Any_Integer
2210 or else Error_Msg_Node_1 = Any_Modular
2211 or else Error_Msg_Node_1 = Any_Numeric
2212 or else Error_Msg_Node_1 = Any_Real
2213 or else Error_Msg_Node_1 = Any_Scalar
2214 or else Error_Msg_Node_1 = Any_String
2216 Get_Unqualified_Decoded_Name_String (Chars (Error_Msg_Node_1));
2217 Set_Msg_Name_Buffer;
2220 elsif Error_Msg_Node_1 = Universal_Real then
2221 Set_Msg_Str ("type universal real");
2224 elsif Error_Msg_Node_1 = Universal_Integer then
2225 Set_Msg_Str ("type universal integer");
2228 elsif Error_Msg_Node_1 = Universal_Fixed then
2229 Set_Msg_Str ("type universal fixed");
2233 -- Special case of anonymous array
2235 if Nkind (Error_Msg_Node_1) in N_Entity
2236 and then Is_Array_Type (Error_Msg_Node_1)
2237 and then Present (Related_Array_Object (Error_Msg_Node_1))
2239 Set_Msg_Str ("type of ");
2240 Set_Msg_Node (Related_Array_Object (Error_Msg_Node_1));
2241 Set_Msg_Str (" declared");
2242 Set_Msg_Insertion_Line_Number
2243 (Sloc (Related_Array_Object (Error_Msg_Node_1)), Flag);
2247 -- If we fall through, it is not a special case, so first output
2248 -- the name of the type, preceded by private for a private type
2250 if Is_Private_Type (Error_Msg_Node_1) then
2251 Set_Msg_Str ("private type ");
2253 Set_Msg_Str ("type ");
2256 Ent := Error_Msg_Node_1;
2258 if Is_Internal_Name (Chars (Ent)) then
2259 Unwind_Internal_Type (Ent);
2262 -- Types in Standard are displayed as "Standard.name"
2264 if Sloc (Ent) <= Standard_Location then
2266 Set_Msg_Str ("Standard.");
2271 -- Types in other language defined units are displayed as
2272 -- "package-name.type-name"
2275 Is_Predefined_File_Name (Unit_File_Name (Get_Source_Unit (Ent)))
2277 Get_Unqualified_Decoded_Name_String
2278 (Unit_Name (Get_Source_Unit (Ent)));
2279 Name_Len := Name_Len - 2;
2281 Set_Casing (Mixed_Case);
2282 Set_Msg_Name_Buffer;
2284 Set_Casing (Mixed_Case);
2289 -- All other types display as "type name" defined at line xxx
2290 -- possibly qualified if qualification is requested.
2294 Set_Qualification (Error_Msg_Qual_Level, Ent);
2298 -- If Ent is an anonymous subprogram type, there is no name
2299 -- to print, so remove enclosing quotes.
2301 if Buffer_Ends_With ("""") then
2302 Buffer_Remove ("""");
2308 -- If the original type did not come from a predefined
2309 -- file, add the location where the type was defined.
2311 if Sloc (Error_Msg_Node_1) > Standard_Location
2313 not Is_Predefined_File_Name
2314 (Unit_File_Name (Get_Source_Unit (Error_Msg_Node_1)))
2316 Set_Msg_Str (" defined");
2317 Set_Msg_Insertion_Line_Number (Sloc (Error_Msg_Node_1), Flag);
2319 -- If it did come from a predefined file, deal with the case where
2320 -- this was a file with a generic instantiation from elsewhere.
2323 if Sloc (Error_Msg_Node_1) > Standard_Location then
2325 Iloc : constant Source_Ptr :=
2326 Instantiation_Location (Sloc (Error_Msg_Node_1));
2329 if Iloc /= No_Location
2330 and then not Suppress_Instance_Location
2332 Set_Msg_Str (" from instance");
2333 Set_Msg_Insertion_Line_Number (Iloc, Flag);
2338 end Set_Msg_Insertion_Type_Reference;
2340 ---------------------------------
2341 -- Set_Msg_Insertion_Unit_Name --
2342 ---------------------------------
2344 procedure Set_Msg_Insertion_Unit_Name (Suffix : Boolean := True) is
2346 if Error_Msg_Unit_1 = No_Unit_Name then
2349 elsif Error_Msg_Unit_1 = Error_Unit_Name then
2351 Set_Msg_Str ("<error>");
2354 Get_Unit_Name_String (Error_Msg_Unit_1, Suffix);
2357 Set_Msg_Name_Buffer;
2361 -- The following assignment ensures that a second percent insertion
2362 -- character will correspond to the Error_Msg_Unit_2 parameter. We
2363 -- suppress possible validity checks in case operating in -gnatVa mode,
2364 -- and Error_Msg_Unit_2 is not needed and has not been set.
2367 pragma Suppress (Range_Check);
2369 Error_Msg_Unit_1 := Error_Msg_Unit_2;
2371 end Set_Msg_Insertion_Unit_Name;
2377 procedure Set_Msg_Node (Node : Node_Id) is
2382 if Nkind (Node) = N_Designator then
2383 Set_Msg_Node (Name (Node));
2385 Set_Msg_Node (Identifier (Node));
2388 elsif Nkind (Node) = N_Defining_Program_Unit_Name then
2389 Set_Msg_Node (Name (Node));
2391 Set_Msg_Node (Defining_Identifier (Node));
2394 elsif Nkind (Node) = N_Selected_Component then
2395 Set_Msg_Node (Prefix (Node));
2397 Set_Msg_Node (Selector_Name (Node));
2401 -- The only remaining possibilities are identifiers, defining
2402 -- identifiers, pragmas, and pragma argument associations.
2404 if Nkind (Node) = N_Pragma then
2405 Nam := Pragma_Name (Node);
2407 -- The other cases have Chars fields, and we want to test for possible
2408 -- internal names, which generally represent something gone wrong. An
2409 -- exception is the case of internal type names, where we try to find a
2410 -- reasonable external representation for the external name
2412 elsif Is_Internal_Name (Chars (Node))
2414 ((Is_Entity_Name (Node)
2415 and then Present (Entity (Node))
2416 and then Is_Type (Entity (Node)))
2418 (Nkind (Node) = N_Defining_Identifier and then Is_Type (Node)))
2420 if Nkind (Node) = N_Identifier then
2421 Ent := Entity (Node);
2426 -- If the type is the designated type of an access_to_subprogram,
2427 -- there is no name to provide in the call.
2429 if Ekind (Ent) = E_Subprogram_Type then
2432 Unwind_Internal_Type (Ent);
2436 -- If not internal name, just use name in Chars field
2439 Nam := Chars (Node);
2442 -- At this stage, the name to output is in Nam
2444 Get_Unqualified_Decoded_Name_String (Nam);
2446 -- Remove trailing upper case letters from the name (useful for
2447 -- dealing with some cases of internal names.
2449 while Name_Len > 1 and then Name_Buffer (Name_Len) in 'A' .. 'Z' loop
2450 Name_Len := Name_Len - 1;
2453 -- If we have any of the names from standard that start with the
2454 -- characters "any " (e.g. Any_Type), then kill the message since
2455 -- almost certainly it is a junk cascaded message.
2458 and then Name_Buffer (1 .. 4) = "any "
2460 Kill_Message := True;
2463 -- Now we have to set the proper case. If we have a source location
2464 -- then do a check to see if the name in the source is the same name
2465 -- as the name in the Names table, except for possible differences
2466 -- in case, which is the case when we can copy from the source.
2469 Src_Loc : constant Source_Ptr := Sloc (Error_Msg_Node_1);
2470 Sbuffer : Source_Buffer_Ptr;
2472 Src_Ptr : Source_Ptr;
2478 -- For standard locations, always use mixed case
2480 if Src_Loc <= No_Location
2481 or else Sloc (Node) <= No_Location
2483 Set_Casing (Mixed_Case);
2486 -- Determine if the reference we are dealing with corresponds
2487 -- to text at the point of the error reference. This will often
2488 -- be the case for simple identifier references, and is the case
2489 -- where we can copy the spelling from the source.
2491 Sbuffer := Source_Text (Get_Source_File_Index (Src_Loc));
2493 while Ref_Ptr <= Name_Len loop
2495 Fold_Lower (Sbuffer (Src_Ptr)) /=
2496 Fold_Lower (Name_Buffer (Ref_Ptr));
2497 Ref_Ptr := Ref_Ptr + 1;
2498 Src_Ptr := Src_Ptr + 1;
2501 -- If we get through the loop without a mismatch, then output
2502 -- the name the way it is spelled in the source program
2504 if Ref_Ptr > Name_Len then
2507 for J in 1 .. Name_Len loop
2508 Name_Buffer (J) := Sbuffer (Src_Ptr);
2509 Src_Ptr := Src_Ptr + 1;
2512 -- Otherwise set the casing using the default identifier casing
2515 Set_Casing (Identifier_Casing (Flag_Source), Mixed_Case);
2520 Set_Msg_Name_Buffer;
2528 procedure Set_Msg_Text (Text : String; Flag : Source_Ptr) is
2529 C : Character; -- Current character
2530 P : Natural; -- Current index;
2533 Manual_Quote_Mode := False;
2534 Is_Unconditional_Msg := False;
2536 Flag_Source := Get_Source_File_Index (Flag);
2539 while P <= Text'Last loop
2543 -- Check for insertion character or sequence
2547 if P <= Text'Last and then Text (P) = '%' then
2549 Set_Msg_Insertion_Name_Literal;
2551 Set_Msg_Insertion_Name;
2555 if P <= Text'Last and then Text (P) = '$' then
2557 Set_Msg_Insertion_Unit_Name (Suffix => False);
2560 Set_Msg_Insertion_Unit_Name;
2564 Set_Msg_Insertion_File_Name;
2567 Set_Msg_Insertion_Type_Reference (Flag);
2570 Set_Msg_Insertion_Reserved_Name;
2573 Set_Msg_Insertion_Node;
2576 Set_Msg_Insertion_Line_Number (Error_Msg_Sloc, Flag);
2579 Continuation := True;
2581 if Text (P) = '\' then
2582 Continuation_New_Line := True;
2587 Set_Msg_Insertion_Column;
2590 Set_Msg_Insertion_Run_Time_Name;
2593 Set_Msg_Insertion_Uint;
2596 Manual_Quote_Mode := not Manual_Quote_Mode;
2600 Is_Unconditional_Msg := True;
2603 null; -- already dealt with
2606 null; -- already dealt with
2609 null; -- already dealt with
2612 Set_Msg_Char (Text (P));
2616 Set_Msg_Str (Error_Msg_String (1 .. Error_Msg_Strlen));
2618 -- Upper case letter
2622 -- Start of reserved word if two or more
2624 if P <= Text'Last and then Text (P) in 'A' .. 'Z' then
2626 Set_Msg_Insertion_Reserved_Word (Text, P);
2628 -- Single upper case letter is just inserted
2634 -- Normal character with no special treatment
2648 procedure Set_Posted (N : Node_Id) is
2652 if Is_Serious_Error then
2654 -- We always set Error_Posted on the node itself
2656 Set_Error_Posted (N);
2658 -- If it is a subexpression, then set Error_Posted on parents
2659 -- up to and including the first non-subexpression construct. This
2660 -- helps avoid cascaded error messages within a single expression.
2666 Set_Error_Posted (P);
2667 exit when Nkind (P) not in N_Subexpr;
2670 -- A special check, if we just posted an error on an attribute
2671 -- definition clause, then also set the entity involved as posted.
2672 -- For example, this stops complaining about the alignment after
2673 -- complaining about the size, which is likely to be useless.
2675 if Nkind (P) = N_Attribute_Definition_Clause then
2676 if Is_Entity_Name (Name (P)) then
2677 Set_Error_Posted (Entity (Name (P)));
2683 -----------------------
2684 -- Set_Qualification --
2685 -----------------------
2687 procedure Set_Qualification (N : Nat; E : Entity_Id) is
2689 if N /= 0 and then Scope (E) /= Standard_Standard then
2690 Set_Qualification (N - 1, Scope (E));
2691 Set_Msg_Node (Scope (E));
2694 end Set_Qualification;
2696 ------------------------
2697 -- Special_Msg_Delete --
2698 ------------------------
2700 function Special_Msg_Delete
2702 N : Node_Or_Entity_Id;
2703 E : Node_Or_Entity_Id) return Boolean
2706 -- Never delete messages in -gnatdO mode
2708 if Debug_Flag_OO then
2711 -- When an atomic object refers to a non-atomic type in the same
2712 -- scope, we implicitly make the type atomic. In the non-error
2713 -- case this is surely safe (and in fact prevents an error from
2714 -- occurring if the type is not atomic by default). But if the
2715 -- object cannot be made atomic, then we introduce an extra junk
2716 -- message by this manipulation, which we get rid of here.
2718 -- We identify this case by the fact that it references a type for
2719 -- which Is_Atomic is set, but there is no Atomic pragma setting it.
2721 elsif Msg = "atomic access to & cannot be guaranteed"
2722 and then Is_Type (E)
2723 and then Is_Atomic (E)
2724 and then No (Get_Rep_Pragma (E, Name_Atomic))
2728 -- When a size is wrong for a frozen type there is no explicit
2729 -- size clause, and other errors have occurred, suppress the
2730 -- message, since it is likely that this size error is a cascaded
2731 -- result of other errors. The reason we eliminate unfrozen types
2732 -- is that messages issued before the freeze type are for sure OK.
2734 elsif Msg = "size for& too small, minimum allowed is ^"
2735 and then Is_Frozen (E)
2736 and then Serious_Errors_Detected > 0
2737 and then Nkind (N) /= N_Component_Clause
2738 and then Nkind (Parent (N)) /= N_Component_Clause
2740 No (Get_Attribute_Definition_Clause (E, Attribute_Size))
2742 No (Get_Attribute_Definition_Clause (E, Attribute_Object_Size))
2744 No (Get_Attribute_Definition_Clause (E, Attribute_Value_Size))
2748 -- All special tests complete, so go ahead with message
2753 end Special_Msg_Delete;
2755 --------------------------
2756 -- Unwind_Internal_Type --
2757 --------------------------
2759 procedure Unwind_Internal_Type (Ent : in out Entity_Id) is
2760 Derived : Boolean := False;
2762 Old_Ent : Entity_Id;
2765 -- Undo placement of a quote, since we will put it back later
2767 Mchar := Msg_Buffer (Msglen);
2770 Msglen := Msglen - 1;
2773 -- The loop here deals with recursive types, we are trying to
2774 -- find a related entity that is not an implicit type. Note
2775 -- that the check with Old_Ent stops us from getting "stuck".
2776 -- Also, we don't output the "type derived from" message more
2777 -- than once in the case where we climb up multiple levels.
2782 -- Implicit access type, use directly designated type
2783 -- In Ada 2005, the designated type may be an anonymous access to
2784 -- subprogram, in which case we can only point to its definition.
2786 if Is_Access_Type (Ent) then
2787 if Ekind (Ent) = E_Access_Subprogram_Type
2788 or else Ekind (Ent) = E_Anonymous_Access_Subprogram_Type
2789 or else Is_Access_Protected_Subprogram_Type (Ent)
2791 Ent := Directly_Designated_Type (Ent);
2793 if not Comes_From_Source (Ent) then
2794 if Buffer_Ends_With ("type ") then
2795 Buffer_Remove ("type ");
2798 Set_Msg_Str ("access to subprogram with profile ");
2800 elsif Ekind (Ent) = E_Function then
2801 Set_Msg_Str ("access to function ");
2803 Set_Msg_Str ("access to procedure ");
2807 -- Type is access to object, named or anonymous
2810 Set_Msg_Str ("access to ");
2811 Ent := Directly_Designated_Type (Ent);
2816 elsif Is_Class_Wide_Type (Ent) then
2818 Ent := Root_Type (Ent);
2820 -- Use base type if this is a subtype
2822 elsif Ent /= Base_Type (Ent) then
2823 Buffer_Remove ("type ");
2825 -- Avoid duplication "subtype of subtype of", and also replace
2826 -- "derived from subtype of" simply by "derived from"
2828 if not Buffer_Ends_With ("subtype of ")
2829 and then not Buffer_Ends_With ("derived from ")
2831 Set_Msg_Str ("subtype of ");
2834 Ent := Base_Type (Ent);
2836 -- If this is a base type with a first named subtype, use the
2837 -- first named subtype instead. This is not quite accurate in
2838 -- all cases, but it makes too much noise to be accurate and
2839 -- add 'Base in all cases. Note that we only do this is the
2840 -- first named subtype is not itself an internal name. This
2841 -- avoids the obvious loop (subtype->basetype->subtype) which
2842 -- would otherwise occur!)
2844 elsif Present (Freeze_Node (Ent))
2845 and then Present (First_Subtype_Link (Freeze_Node (Ent)))
2847 not Is_Internal_Name
2848 (Chars (First_Subtype_Link (Freeze_Node (Ent))))
2850 Ent := First_Subtype_Link (Freeze_Node (Ent));
2852 -- Otherwise use root type
2856 Buffer_Remove ("type ");
2858 -- Test for "subtype of type derived from" which seems
2859 -- excessive and is replaced by simply "type derived from"
2861 Buffer_Remove ("subtype of");
2863 -- Avoid duplication "type derived from type derived from"
2865 if not Buffer_Ends_With ("type derived from ") then
2866 Set_Msg_Str ("type derived from ");
2875 -- If we are stuck in a loop, get out and settle for the internal
2876 -- name after all. In this case we set to kill the message if it
2877 -- is not the first error message (we really try hard not to show
2878 -- the dirty laundry of the implementation to the poor user!)
2880 if Ent = Old_Ent then
2881 Kill_Message := True;
2885 -- Get out if we finally found a non-internal name to use
2887 exit when not Is_Internal_Name (Chars (Ent));
2893 end Unwind_Internal_Type;
2899 procedure VMS_Convert is
2909 P := Msg_Buffer'First;
2915 if Msg_Buffer (P) = '-' then
2916 for G in Gnames'Range loop
2917 L := Gnames (G)'Length;
2919 -- See if we have "-ggg switch", where ggg is Gnames entry
2921 if P + L + 7 <= Msglen
2922 and then Msg_Buffer (P + 1 .. P + L) = Gnames (G).all
2923 and then Msg_Buffer (P + L + 1 .. P + L + 7) = " switch"
2925 -- Replace by "/vvv qualifier", where vvv is Vnames entry
2927 N := Vnames (G)'Length;
2928 Msg_Buffer (P + N + 11 .. Msglen + N - L + 3) :=
2929 Msg_Buffer (P + L + 8 .. Msglen);
2930 Msg_Buffer (P) := '/';
2931 Msg_Buffer (P + 1 .. P + N) := Vnames (G).all;
2932 Msg_Buffer (P + N + 1 .. P + N + 10) := " qualifier";
2934 Msglen := Msglen + N - L + 3;