1 ------------------------------------------------------------------------------
3 -- GNAT COMPILER COMPONENTS --
9 -- Copyright (C) 1992-2011, Free Software Foundation, Inc. --
11 -- GNAT is free software; you can redistribute it and/or modify it under --
12 -- terms of the GNU General Public License as published by the Free Soft- --
13 -- ware Foundation; either version 3, or (at your option) any later ver- --
14 -- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
15 -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
16 -- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License --
17 -- for more details. You should have received a copy of the GNU General --
18 -- Public License distributed with GNAT; see file COPYING3. If not, go to --
19 -- http://www.gnu.org/licenses for a complete copy of the license. --
21 -- GNAT was originally developed by the GNAT team at New York University. --
22 -- Extensive contributions were provided by Ada Core Technologies Inc. --
24 ------------------------------------------------------------------------------
26 -- Warning! Error messages can be generated during Gigi processing by direct
27 -- calls to error message routines, so it is essential that the processing
28 -- in this body be consistent with the requirements for the Gigi processing
29 -- environment, and that in particular, no disallowed table expansion is
32 with Atree; use Atree;
33 with Casing; use Casing;
34 with Csets; use Csets;
35 with Debug; use Debug;
36 with Einfo; use Einfo;
37 with Erroutc; use Erroutc;
38 with Fname; use Fname;
39 with Gnatvsn; use Gnatvsn;
40 with Hostparm; use Hostparm;
43 with Nlists; use Nlists;
44 with Output; use Output;
45 with Scans; use Scans;
46 with Sem_Aux; use Sem_Aux;
47 with Sinput; use Sinput;
48 with Sinfo; use Sinfo;
49 with Snames; use Snames;
50 with Stand; use Stand;
51 with Stylesw; use Stylesw;
52 with Uname; use Uname;
54 package body Errout is
56 Errors_Must_Be_Ignored : Boolean := False;
57 -- Set to True by procedure Set_Ignore_Errors (True), when calls to error
58 -- message procedures should be ignored (when parsing irrelevant text in
59 -- sources being preprocessed).
61 Finalize_Called : Boolean := False;
62 -- Set True if the Finalize routine has been called
64 Warn_On_Instance : Boolean;
65 -- Flag set true for warning message to be posted on instance
67 ------------------------------------
68 -- Table of Non-Instance Messages --
69 ------------------------------------
71 -- This table contains an entry for every error message processed by the
72 -- Error_Msg routine that is not posted on generic (or inlined) instance.
73 -- As explained in further detail in the Error_Msg procedure body, this
74 -- table is used to avoid posting redundant messages on instances.
76 type NIM_Record is record
80 -- Type used to store text and location of one message
82 package Non_Instance_Msgs is new Table.Table (
83 Table_Component_Type => NIM_Record,
84 Table_Index_Type => Int,
87 Table_Increment => 100,
88 Table_Name => "Non_Instance_Msgs");
90 -----------------------
91 -- Local Subprograms --
92 -----------------------
94 procedure Error_Msg_Internal
99 -- This is the low level routine used to post messages after dealing with
100 -- the issue of messages placed on instantiations (which get broken up
101 -- into separate calls in Error_Msg). Sptr is the location on which the
102 -- flag will be placed in the output. In the case where the flag is on
103 -- the template, this points directly to the template, not to one of the
104 -- instantiation copies of the template. Optr is the original location
105 -- used to flag the error, and this may indeed point to an instantiation
106 -- copy. So typically we can see Optr pointing to the template location
107 -- in an instantiation copy when Sptr points to the source location of
108 -- the actual instantiation (i.e the line with the new). Msg_Cont is
109 -- set true if this is a continuation message.
111 function No_Warnings (N : Node_Or_Entity_Id) return Boolean;
112 -- Determines if warnings should be suppressed for the given node
114 function OK_Node (N : Node_Id) return Boolean;
115 -- Determines if a node is an OK node to place an error message on (return
116 -- True) or if the error message should be suppressed (return False). A
117 -- message is suppressed if the node already has an error posted on it,
118 -- or if it refers to an Etype that has an error posted on it, or if
119 -- it references an Entity that has an error posted on it.
121 procedure Output_Source_Line
122 (L : Physical_Line_Number;
123 Sfile : Source_File_Index;
125 -- Outputs text of source line L, in file S, together with preceding line
126 -- number, as described above for Output_Line_Number. The Errs parameter
127 -- indicates if there are errors attached to the line, which forces
128 -- listing on, even in the presence of pragma List (Off).
130 procedure Set_Msg_Insertion_Column;
131 -- Handle column number insertion (@ insertion character)
133 procedure Set_Msg_Insertion_Node;
134 -- Handle node (name from node) insertion (& insertion character)
136 procedure Set_Msg_Insertion_Type_Reference (Flag : Source_Ptr);
137 -- Handle type reference (right brace insertion character). Flag is the
138 -- location of the flag, which is provided for the internal call to
139 -- Set_Msg_Insertion_Line_Number,
141 procedure Set_Msg_Insertion_Unit_Name (Suffix : Boolean := True);
142 -- Handle unit name insertion ($ insertion character). Depending on Boolean
143 -- parameter Suffix, (spec) or (body) is appended after the unit name.
145 procedure Set_Msg_Node (Node : Node_Id);
146 -- Add the sequence of characters for the name associated with the
147 -- given node to the current message.
149 procedure Set_Msg_Text (Text : String; Flag : Source_Ptr);
150 -- Add a sequence of characters to the current message. The characters may
151 -- be one of the special insertion characters (see documentation in spec).
152 -- Flag is the location at which the error is to be posted, which is used
153 -- to determine whether or not the # insertion needs a file name. The
154 -- variables Msg_Buffer, Msglen, Is_Style_Msg, Is_Warning_Msg, and
155 -- Is_Unconditional_Msg are set on return.
157 procedure Set_Posted (N : Node_Id);
158 -- Sets the Error_Posted flag on the given node, and all its parents
159 -- that are subexpressions and then on the parent non-subexpression
160 -- construct that contains the original expression (this reduces the
161 -- number of cascaded messages). Note that this call only has an effect
162 -- for a serious error. For a non-serious error, it has no effect.
164 procedure Set_Qualification (N : Nat; E : Entity_Id);
165 -- Outputs up to N levels of qualification for the given entity. For
166 -- example, the entity A.B.C.D will output B.C. if N = 2.
168 function Special_Msg_Delete
170 N : Node_Or_Entity_Id;
171 E : Node_Or_Entity_Id) return Boolean;
172 -- This function is called from Error_Msg_NEL, passing the message Msg,
173 -- node N on which the error is to be posted, and the entity or node E
174 -- to be used for an & insertion in the message if any. The job of this
175 -- procedure is to test for certain cascaded messages that we would like
176 -- to suppress. If the message is to be suppressed then we return True.
177 -- If the message should be generated (the normal case) False is returned.
179 procedure Unwind_Internal_Type (Ent : in out Entity_Id);
180 -- This procedure is given an entity id for an internal type, i.e. a type
181 -- with an internal name. It unwinds the type to try to get to something
182 -- reasonably printable, generating prefixes like "subtype of", "access
183 -- to", etc along the way in the buffer. The value in Ent on return is the
184 -- final name to be printed. Hopefully this is not an internal name, but in
185 -- some internal name cases, it is an internal name, and has to be printed
186 -- anyway (although in this case the message has been killed if possible).
187 -- The global variable Class_Flag is set to True if the resulting entity
188 -- should have 'Class appended to its name (see Add_Class procedure), and
189 -- is otherwise unchanged.
191 procedure VMS_Convert;
192 -- This procedure has no effect if called when the host is not OpenVMS. If
193 -- the host is indeed OpenVMS, then the error message stored in Msg_Buffer
194 -- is scanned for appearances of switch names which need converting to
195 -- corresponding VMS qualifier names. See Gnames/Vnames table in Errout
196 -- spec for precise definition of the conversion that is performed by this
197 -- routine in OpenVMS mode.
199 -----------------------
200 -- Change_Error_Text --
201 -----------------------
203 procedure Change_Error_Text (Error_Id : Error_Msg_Id; New_Msg : String) is
204 Save_Next : Error_Msg_Id;
205 Err_Id : Error_Msg_Id := Error_Id;
208 Set_Msg_Text (New_Msg, Errors.Table (Error_Id).Sptr);
209 Errors.Table (Error_Id).Text := new String'(Msg_Buffer (1 .. Msglen));
211 -- If in immediate error message mode, output modified error message now
212 -- This is just a bit tricky, because we want to output just a single
213 -- message, and the messages we modified is already linked in. We solve
214 -- this by temporarily resetting its forward pointer to empty.
216 if Debug_Flag_OO then
217 Save_Next := Errors.Table (Error_Id).Next;
218 Errors.Table (Error_Id).Next := No_Error_Msg;
221 (Errors.Table (Error_Id).Line, Errors.Table (Error_Id).Sfile, True);
222 Output_Error_Msgs (Err_Id);
223 Errors.Table (Error_Id).Next := Save_Next;
225 end Change_Error_Text;
227 ------------------------
228 -- Compilation_Errors --
229 ------------------------
231 function Compilation_Errors return Boolean is
233 if not Finalize_Called then
236 return Erroutc.Compilation_Errors;
238 end Compilation_Errors;
244 -- Error_Msg posts a flag at the given location, except that if the
245 -- Flag_Location points within a generic template and corresponds to an
246 -- instantiation of this generic template, then the actual message will be
247 -- posted on the generic instantiation, along with additional messages
248 -- referencing the generic declaration.
250 procedure Error_Msg (Msg : String; Flag_Location : Source_Ptr) is
251 Sindex : Source_File_Index;
252 -- Source index for flag location
254 Orig_Loc : Source_Ptr;
255 -- Original location of Flag_Location (i.e. location in original
256 -- template in instantiation case, otherwise unchanged).
259 -- It is a fatal error to issue an error message when scanning from the
260 -- internal source buffer (see Sinput for further documentation)
262 pragma Assert (Sinput.Source /= Internal_Source_Ptr);
264 -- Return if all errors are to be ignored
266 if Errors_Must_Be_Ignored then
270 -- If we already have messages, and we are trying to place a message at
271 -- No_Location or in package Standard, then just ignore the attempt
272 -- since we assume that what is happening is some cascaded junk. Note
273 -- that this is safe in the sense that proceeding will surely bomb.
275 if Flag_Location < First_Source_Ptr
276 and then Total_Errors_Detected > 0
281 -- Start of processing for new message
283 Sindex := Get_Source_File_Index (Flag_Location);
284 Test_Style_Warning_Serious_Msg (Msg);
285 Orig_Loc := Original_Location (Flag_Location);
287 -- If the current location is in an instantiation, the issue arises of
288 -- whether to post the message on the template or the instantiation.
290 -- The way we decide is to see if we have posted the same message on
291 -- the template when we compiled the template (the template is always
292 -- compiled before any instantiations). For this purpose, we use a
293 -- separate table of messages. The reason we do this is twofold:
295 -- First, the messages can get changed by various processing
296 -- including the insertion of tokens etc, making it hard to
297 -- do the comparison.
299 -- Second, we will suppress a warning on a template if it is not in
300 -- the current extended source unit. That's reasonable and means we
301 -- don't want the warning on the instantiation here either, but it
302 -- does mean that the main error table would not in any case include
305 if Flag_Location = Orig_Loc then
306 Non_Instance_Msgs.Append ((new String'(Msg), Flag_Location));
307 Warn_On_Instance := False;
309 -- Here we have an instance message
312 -- Delete if debug flag off, and this message duplicates a message
313 -- already posted on the corresponding template
315 if not Debug_Flag_GG then
316 for J in Non_Instance_Msgs.First .. Non_Instance_Msgs.Last loop
317 if Msg = Non_Instance_Msgs.Table (J).Msg.all
318 and then Non_Instance_Msgs.Table (J).Loc = Orig_Loc
325 -- No duplicate, so error/warning will be posted on instance
327 Warn_On_Instance := Is_Warning_Msg;
330 -- Ignore warning message that is suppressed for this location. Note
331 -- that style checks are not considered warning messages for this
334 if Is_Warning_Msg and then Warnings_Suppressed (Orig_Loc) then
337 -- For style messages, check too many messages so far
340 and then Maximum_Messages /= 0
341 and then Warnings_Detected >= Maximum_Messages
346 -- The idea at this stage is that we have two kinds of messages
348 -- First, we have those messages that are to be placed as requested at
349 -- Flag_Location. This includes messages that have nothing to do with
350 -- generics, and also messages placed on generic templates that reflect
351 -- an error in the template itself. For such messages we simply call
352 -- Error_Msg_Internal to place the message in the requested location.
354 if Instantiation (Sindex) = No_Location then
355 Error_Msg_Internal (Msg, Flag_Location, Flag_Location, False);
359 -- If we are trying to flag an error in an instantiation, we may have
360 -- a generic contract violation. What we generate in this case is:
362 -- instantiation error at ...
363 -- original error message
367 -- warning: in instantiation at
368 -- warning: original warning message
370 -- All these messages are posted at the location of the top level
371 -- instantiation. If there are nested instantiations, then the
372 -- instantiation error message can be repeated, pointing to each
373 -- of the relevant instantiations.
375 -- Note: the instantiation mechanism is also shared for inlining of
376 -- subprogram bodies when front end inlining is done. In this case the
377 -- messages have the form:
379 -- in inlined body at ...
380 -- original error message
384 -- warning: in inlined body at
385 -- warning: original warning message
387 -- OK, here we have an instantiation error, and we need to generate the
388 -- error on the instantiation, rather than on the template.
391 Actual_Error_Loc : Source_Ptr;
392 -- Location of outer level instantiation in instantiation case, or
393 -- just a copy of Flag_Location in the normal case. This is the
394 -- location where all error messages will actually be posted.
396 Save_Error_Msg_Sloc : constant Source_Ptr := Error_Msg_Sloc;
397 -- Save possible location set for caller's message. We need to use
398 -- Error_Msg_Sloc for the location of the instantiation error but we
399 -- have to preserve a possible original value.
401 X : Source_File_Index;
403 Msg_Cont_Status : Boolean;
404 -- Used to label continuation lines in instantiation case with
405 -- proper Msg_Cont status.
408 -- Loop to find highest level instantiation, where all error
409 -- messages will be placed.
413 Actual_Error_Loc := Instantiation (X);
414 X := Get_Source_File_Index (Actual_Error_Loc);
415 exit when Instantiation (X) = No_Location;
418 -- Since we are generating the messages at the instantiation point in
419 -- any case, we do not want the references to the bad lines in the
420 -- instance to be annotated with the location of the instantiation.
422 Suppress_Instance_Location := True;
423 Msg_Cont_Status := False;
425 -- Loop to generate instantiation messages
427 Error_Msg_Sloc := Flag_Location;
428 X := Get_Source_File_Index (Flag_Location);
429 while Instantiation (X) /= No_Location loop
431 -- Suppress instantiation message on continuation lines
433 if Msg (Msg'First) /= '\' then
435 -- Case of inlined body
437 if Inlined_Body (X) then
438 if Is_Warning_Msg or else Is_Style_Msg then
440 ("?in inlined body #",
441 Actual_Error_Loc, Flag_Location, Msg_Cont_Status);
445 ("error in inlined body #",
446 Actual_Error_Loc, Flag_Location, Msg_Cont_Status);
449 -- Case of generic instantiation
452 if Is_Warning_Msg or else Is_Style_Msg then
454 ("?in instantiation #",
455 Actual_Error_Loc, Flag_Location, Msg_Cont_Status);
459 ("instantiation error #",
460 Actual_Error_Loc, Flag_Location, Msg_Cont_Status);
465 Error_Msg_Sloc := Instantiation (X);
466 X := Get_Source_File_Index (Error_Msg_Sloc);
467 Msg_Cont_Status := True;
470 Suppress_Instance_Location := False;
471 Error_Msg_Sloc := Save_Error_Msg_Sloc;
473 -- Here we output the original message on the outer instantiation
476 (Msg, Actual_Error_Loc, Flag_Location, Msg_Cont_Status);
484 procedure Error_Msg_AP (Msg : String) is
489 -- If we had saved the Scan_Ptr value after scanning the previous
490 -- token, then we would have exactly the right place for putting
491 -- the flag immediately at hand. However, that would add at least
492 -- two instructions to a Scan call *just* to service the possibility
493 -- of an Error_Msg_AP call. So instead we reconstruct that value.
495 -- We have two possibilities, start with Prev_Token_Ptr and skip over
496 -- the current token, which is made harder by the possibility that this
497 -- token may be in error, or start with Token_Ptr and work backwards.
498 -- We used to take the second approach, but it's hard because of
499 -- comments, and harder still because things that look like comments
500 -- can appear inside strings. So now we take the first approach.
502 -- Note: in the case where there is no previous token, Prev_Token_Ptr
503 -- is set to Source_First, which is a reasonable position for the
504 -- error flag in this situation.
506 S1 := Prev_Token_Ptr;
509 -- If the previous token is a string literal, we need a special approach
510 -- since there may be white space inside the literal and we don't want
511 -- to stop on that white space.
513 -- Note: since this is an error recovery issue anyway, it is not worth
514 -- worrying about special UTF_32 line terminator characters here.
516 if Prev_Token = Tok_String_Literal then
520 if Source (S1) = C then
522 exit when Source (S1) /= C;
523 elsif Source (S1) in Line_Terminator then
528 -- Character literal also needs special handling
530 elsif Prev_Token = Tok_Char_Literal then
533 -- Otherwise we search forward for the end of the current token, marked
534 -- by a line terminator, white space, a comment symbol or if we bump
535 -- into the following token (i.e. the current token).
537 -- Again, it is not worth worrying about UTF_32 special line terminator
538 -- characters in this context, since this is only for error recovery.
541 while Source (S1) not in Line_Terminator
542 and then Source (S1) /= ' '
543 and then Source (S1) /= ASCII.HT
544 and then (Source (S1) /= '-' or else Source (S1 + 1) /= '-')
545 and then S1 /= Token_Ptr
551 -- S1 is now set to the location for the flag
560 procedure Error_Msg_BC (Msg : String) is
562 -- If we are at end of file, post the flag after the previous token
564 if Token = Tok_EOF then
567 -- If we are at start of file, post the flag at the current token
569 elsif Token_Ptr = Source_First (Current_Source_File) then
572 -- If the character before the current token is a space or a horizontal
573 -- tab, then we place the flag on this character (in the case of a tab
574 -- we would really like to place it in the "last" character of the tab
575 -- space, but that it too much trouble to worry about).
577 elsif Source (Token_Ptr - 1) = ' '
578 or else Source (Token_Ptr - 1) = ASCII.HT
580 Error_Msg (Msg, Token_Ptr - 1);
582 -- If there is no space or tab before the current token, then there is
583 -- no room to place the flag before the token, so we place it on the
584 -- token instead (this happens for example at the start of a line).
587 Error_Msg (Msg, Token_Ptr);
595 procedure Error_Msg_CRT (Feature : String; N : Node_Id) is
596 CNRT : constant String := " not allowed in no run time mode";
597 CCRT : constant String := " not supported by configuration>";
599 S : String (1 .. Feature'Length + 1 + CCRT'Length);
604 S (2 .. Feature'Length + 1) := Feature;
605 L := Feature'Length + 2;
607 if No_Run_Time_Mode then
608 S (L .. L + CNRT'Length - 1) := CNRT;
609 L := L + CNRT'Length - 1;
611 else pragma Assert (Configurable_Run_Time_Mode);
612 S (L .. L + CCRT'Length - 1) := CCRT;
613 L := L + CCRT'Length - 1;
616 Error_Msg_N (S (1 .. L), N);
617 Configurable_Run_Time_Violations := Configurable_Run_Time_Violations + 1;
624 procedure Error_Msg_F (Msg : String; N : Node_Id) is
626 Error_Msg_NEL (Msg, N, N, Sloc (First_Node (N)));
633 procedure Error_Msg_FE
636 E : Node_Or_Entity_Id)
639 Error_Msg_NEL (Msg, N, E, Sloc (First_Node (N)));
642 ------------------------
643 -- Error_Msg_Internal --
644 ------------------------
646 procedure Error_Msg_Internal
652 Next_Msg : Error_Msg_Id;
653 -- Pointer to next message at insertion point
655 Prev_Msg : Error_Msg_Id;
656 -- Pointer to previous message at insertion point
658 Temp_Msg : Error_Msg_Id;
660 procedure Handle_Serious_Error;
661 -- Internal procedure to do all error message handling for a serious
662 -- error message, other than bumping the error counts and arranging
663 -- for the message to be output.
665 --------------------------
666 -- Handle_Serious_Error --
667 --------------------------
669 procedure Handle_Serious_Error is
671 -- Turn off code generation if not done already
673 if Operating_Mode = Generate_Code then
674 Operating_Mode := Check_Semantics;
675 Expander_Active := False;
678 -- Set the fatal error flag in the unit table unless we are in
679 -- Try_Semantics mode. This stops the semantics from being performed
680 -- if we find a serious error. This is skipped if we are currently
681 -- dealing with the configuration pragma file.
683 if not Try_Semantics and then Current_Source_Unit /= No_Unit then
684 Set_Fatal_Error (Get_Source_Unit (Sptr));
686 end Handle_Serious_Error;
688 -- Start of processing for Error_Msg_Internal
691 if Raise_Exception_On_Error /= 0 then
692 raise Error_Msg_Exception;
695 Continuation := Msg_Cont;
696 Continuation_New_Line := False;
697 Suppress_Message := False;
698 Kill_Message := False;
699 Set_Msg_Text (Msg, Sptr);
701 -- Kill continuation if parent message killed
703 if Continuation and Last_Killed then
707 -- Return without doing anything if message is suppressed
710 and then not All_Errors_Mode
711 and then not Is_Warning_Msg
712 and then Msg (Msg'Last) /= '!'
714 if not Continuation then
721 -- Return without doing anything if message is killed and this is not
722 -- the first error message. The philosophy is that if we get a weird
723 -- error message and we already have had a message, then we hope the
724 -- weird message is a junk cascaded message
727 and then not All_Errors_Mode
728 and then Total_Errors_Detected /= 0
730 if not Continuation then
737 -- Special check for warning message to see if it should be output
739 if Is_Warning_Msg then
741 -- Immediate return if warning message and warnings are suppressed
743 if Warnings_Suppressed (Optr) or else Warnings_Suppressed (Sptr) then
744 Cur_Msg := No_Error_Msg;
748 -- If the flag location is in the main extended source unit then for
749 -- sure we want the warning since it definitely belongs
751 if In_Extended_Main_Source_Unit (Sptr) then
754 -- If the main unit has not been read yet. the warning must be on
755 -- a configuration file: gnat.adc or user-defined. This means we
756 -- are not parsing the main unit yet, so skip following checks.
758 elsif No (Cunit (Main_Unit)) then
761 -- If the flag location is not in the main extended source unit, then
762 -- we want to eliminate the warning, unless it is in the extended
763 -- main code unit and we want warnings on the instance.
765 elsif In_Extended_Main_Code_Unit (Sptr) and then Warn_On_Instance then
768 -- Keep warning if debug flag G set
770 elsif Debug_Flag_GG then
773 -- Keep warning if message text ends in !!
775 elsif Msg (Msg'Last) = '!' and then Msg (Msg'Last - 1) = '!' then
778 -- Here is where we delete a warning from a with'ed unit
781 Cur_Msg := No_Error_Msg;
783 if not Continuation then
791 -- If message is to be ignored in special ignore message mode, this is
792 -- where we do this special processing, bypassing message output.
794 if Ignore_Errors_Enable > 0 then
795 if Is_Serious_Error then
796 Handle_Serious_Error;
802 -- If error message line length set, and this is a continuation message
803 -- then all we do is to append the text to the text of the last message
804 -- with a comma space separator (eliminating a possible (style) or
807 if Error_Msg_Line_Length /= 0
808 and then Continuation
810 Cur_Msg := Errors.Last;
813 Oldm : String_Ptr := Errors.Table (Cur_Msg).Text;
814 Newm : String (1 .. Oldm'Last + 2 + Msglen);
819 -- First copy old message to new one and free it
821 Newm (Oldm'Range) := Oldm.all;
825 -- Remove (style) or info: at start of message
827 if Msglen > 8 and then Msg_Buffer (1 .. 8) = "(style) " then
830 elsif Msglen > 6 and then Msg_Buffer (1 .. 6) = "info: " then
837 -- Now deal with separation between messages. Normally this is
838 -- simply comma space, but there are some special cases.
840 -- If continuation new line, then put actual NL character in msg
842 if Continuation_New_Line then
844 Newm (Newl) := ASCII.LF;
846 -- If continuation message is enclosed in parentheses, then
847 -- special treatment (don't need a comma, and we want to combine
848 -- successive parenthetical remarks into a single one with
849 -- separating commas).
851 elsif Msg_Buffer (M) = '(' and then Msg_Buffer (Msglen) = ')' then
853 -- Case where existing message ends in right paren, remove
854 -- and separate parenthetical remarks with a comma.
856 if Newm (Newl) = ')' then
858 Msg_Buffer (M) := ' ';
860 -- Case where we are adding new parenthetical comment
867 -- Case where continuation not in parens and no new line
870 Newm (Newl + 1 .. Newl + 2) := ", ";
874 -- Append new message
876 Newm (Newl + 1 .. Newl + Msglen - M + 1) :=
877 Msg_Buffer (M .. Msglen);
878 Newl := Newl + Msglen - M + 1;
879 Errors.Table (Cur_Msg).Text := new String'(Newm (1 .. Newl));
885 -- Otherwise build error message object for new message
888 ((Text => new String'(Msg_Buffer (1 .. Msglen)),
889 Next => No_Error_Msg,
890 Prev => No_Error_Msg,
893 Sfile => Get_Source_File_Index (Sptr),
894 Line => Get_Physical_Line_Number (Sptr),
895 Col => Get_Column_Number (Sptr),
896 Warn => Is_Warning_Msg,
897 Style => Is_Style_Msg,
898 Serious => Is_Serious_Error,
899 Uncond => Is_Unconditional_Msg,
900 Msg_Cont => Continuation,
902 Cur_Msg := Errors.Last;
904 -- If immediate errors mode set, output error message now. Also output
905 -- now if the -d1 debug flag is set (so node number message comes out
906 -- just before actual error message)
908 if Debug_Flag_OO or else Debug_Flag_1 then
911 (Errors.Table (Cur_Msg).Line, Errors.Table (Cur_Msg).Sfile, True);
913 Output_Error_Msgs (Temp_Msg);
915 -- If not in immediate errors mode, then we insert the message in the
916 -- error chain for later output by Finalize. The messages are sorted
917 -- first by unit (main unit comes first), and within a unit by source
918 -- location (earlier flag location first in the chain).
921 -- First a quick check, does this belong at the very end of the chain
922 -- of error messages. This saves a lot of time in the normal case if
923 -- there are lots of messages.
925 if Last_Error_Msg /= No_Error_Msg
926 and then Errors.Table (Cur_Msg).Sfile =
927 Errors.Table (Last_Error_Msg).Sfile
928 and then (Sptr > Errors.Table (Last_Error_Msg).Sptr
930 (Sptr = Errors.Table (Last_Error_Msg).Sptr
932 Optr > Errors.Table (Last_Error_Msg).Optr))
934 Prev_Msg := Last_Error_Msg;
935 Next_Msg := No_Error_Msg;
937 -- Otherwise do a full sequential search for the insertion point
940 Prev_Msg := No_Error_Msg;
941 Next_Msg := First_Error_Msg;
942 while Next_Msg /= No_Error_Msg loop
944 Errors.Table (Cur_Msg).Sfile < Errors.Table (Next_Msg).Sfile;
946 if Errors.Table (Cur_Msg).Sfile =
947 Errors.Table (Next_Msg).Sfile
949 exit when Sptr < Errors.Table (Next_Msg).Sptr
951 (Sptr = Errors.Table (Next_Msg).Sptr
953 Optr < Errors.Table (Next_Msg).Optr);
956 Prev_Msg := Next_Msg;
957 Next_Msg := Errors.Table (Next_Msg).Next;
961 -- Now we insert the new message in the error chain. The insertion
962 -- point for the message is after Prev_Msg and before Next_Msg.
964 -- The possible insertion point for the new message is after Prev_Msg
965 -- and before Next_Msg. However, this is where we do a special check
966 -- for redundant parsing messages, defined as messages posted on the
967 -- same line. The idea here is that probably such messages are junk
968 -- from the parser recovering. In full errors mode, we don't do this
969 -- deletion, but otherwise such messages are discarded at this stage.
971 if Prev_Msg /= No_Error_Msg
972 and then Errors.Table (Prev_Msg).Line =
973 Errors.Table (Cur_Msg).Line
974 and then Errors.Table (Prev_Msg).Sfile =
975 Errors.Table (Cur_Msg).Sfile
976 and then Compiler_State = Parsing
977 and then not All_Errors_Mode
979 -- Don't delete unconditional messages and at this stage, don't
980 -- delete continuation lines (we attempted to delete those earlier
981 -- if the parent message was deleted.
983 if not Errors.Table (Cur_Msg).Uncond
984 and then not Continuation
986 -- Don't delete if prev msg is warning and new msg is an error.
987 -- This is because we don't want a real error masked by a
988 -- warning. In all other cases (that is parse errors for the
989 -- same line that are not unconditional) we do delete the
990 -- message. This helps to avoid junk extra messages from
991 -- cascaded parsing errors
993 if not (Errors.Table (Prev_Msg).Warn
995 Errors.Table (Prev_Msg).Style)
997 (Errors.Table (Cur_Msg).Warn
999 Errors.Table (Cur_Msg).Style)
1001 -- All tests passed, delete the message by simply returning
1002 -- without any further processing.
1004 if not Continuation then
1005 Last_Killed := True;
1013 -- Come here if message is to be inserted in the error chain
1015 if not Continuation then
1016 Last_Killed := False;
1019 if Prev_Msg = No_Error_Msg then
1020 First_Error_Msg := Cur_Msg;
1022 Errors.Table (Prev_Msg).Next := Cur_Msg;
1025 Errors.Table (Cur_Msg).Next := Next_Msg;
1027 if Next_Msg = No_Error_Msg then
1028 Last_Error_Msg := Cur_Msg;
1032 -- Bump appropriate statistics count
1034 if Errors.Table (Cur_Msg).Warn or else Errors.Table (Cur_Msg).Style then
1035 Warnings_Detected := Warnings_Detected + 1;
1038 Total_Errors_Detected := Total_Errors_Detected + 1;
1040 if Errors.Table (Cur_Msg).Serious then
1041 Serious_Errors_Detected := Serious_Errors_Detected + 1;
1042 Handle_Serious_Error;
1046 -- If too many warnings turn off warnings
1048 if Maximum_Messages /= 0 then
1049 if Warnings_Detected = Maximum_Messages then
1050 Warning_Mode := Suppress;
1053 -- If too many errors abandon compilation
1055 if Total_Errors_Detected = Maximum_Messages then
1056 raise Unrecoverable_Error;
1059 end Error_Msg_Internal;
1065 procedure Error_Msg_N (Msg : String; N : Node_Or_Entity_Id) is
1067 Error_Msg_NEL (Msg, N, N, Sloc (N));
1074 procedure Error_Msg_NE
1076 N : Node_Or_Entity_Id;
1077 E : Node_Or_Entity_Id)
1080 Error_Msg_NEL (Msg, N, E, Sloc (N));
1087 procedure Error_Msg_NEL
1089 N : Node_Or_Entity_Id;
1090 E : Node_Or_Entity_Id;
1091 Flag_Location : Source_Ptr)
1094 if Special_Msg_Delete (Msg, N, E) then
1098 Test_Style_Warning_Serious_Msg (Msg);
1100 -- Special handling for warning messages
1102 if Is_Warning_Msg then
1104 -- Suppress if no warnings set for either entity or node
1106 if No_Warnings (N) or else No_Warnings (E) then
1108 -- Disable any continuation messages as well
1110 Last_Killed := True;
1114 -- Suppress if inside loop that is known to be null or is probably
1115 -- null (case where loop executes only if invalid values present).
1116 -- In either case warnings in the loop are likely to be junk.
1123 while Present (P) loop
1124 if Nkind (P) = N_Loop_Statement
1125 and then Suppress_Loop_Warnings (P)
1135 -- Test for message to be output
1138 or else Msg (Msg'Last) = '!'
1139 or else Is_Warning_Msg
1141 or else (Msg (Msg'First) = '\' and then not Last_Killed)
1144 Error_Msg_Node_1 := E;
1145 Error_Msg (Msg, Flag_Location);
1148 Last_Killed := True;
1151 if not (Is_Warning_Msg or Is_Style_Msg) then
1160 procedure Error_Msg_NW
1163 N : Node_Or_Entity_Id)
1167 and then In_Extended_Main_Source_Unit (N)
1168 and then Comes_From_Source (N)
1170 Error_Msg_NEL (Msg, N, N, Sloc (N));
1178 procedure Error_Msg_S (Msg : String) is
1180 Error_Msg (Msg, Scan_Ptr);
1187 procedure Error_Msg_SC (Msg : String) is
1189 -- If we are at end of file, post the flag after the previous token
1191 if Token = Tok_EOF then
1194 -- For all other cases the message is posted at the current token
1198 Error_Msg (Msg, Token_Ptr);
1206 procedure Error_Msg_SP (Msg : String) is
1208 -- Note: in the case where there is no previous token, Prev_Token_Ptr
1209 -- is set to Source_First, which is a reasonable position for the
1210 -- error flag in this situation
1212 Error_Msg (Msg, Prev_Token_Ptr);
1219 procedure Finalize (Last_Call : Boolean) is
1224 procedure Delete_Warning (E : Error_Msg_Id);
1225 -- Delete a message if not already deleted and adjust warning count
1227 --------------------
1228 -- Delete_Warning --
1229 --------------------
1231 procedure Delete_Warning (E : Error_Msg_Id) is
1233 if not Errors.Table (E).Deleted then
1234 Errors.Table (E).Deleted := True;
1235 Warnings_Detected := Warnings_Detected - 1;
1239 -- Start of message for Finalize
1242 -- Set Prev pointers
1244 Cur := First_Error_Msg;
1245 while Cur /= No_Error_Msg loop
1246 Nxt := Errors.Table (Cur).Next;
1247 exit when Nxt = No_Error_Msg;
1248 Errors.Table (Nxt).Prev := Cur;
1252 -- Eliminate any duplicated error messages from the list. This is
1253 -- done after the fact to avoid problems with Change_Error_Text.
1255 Cur := First_Error_Msg;
1256 while Cur /= No_Error_Msg loop
1257 Nxt := Errors.Table (Cur).Next;
1260 while F /= No_Error_Msg
1261 and then Errors.Table (F).Sptr = Errors.Table (Cur).Sptr
1263 Check_Duplicate_Message (Cur, F);
1264 F := Errors.Table (F).Next;
1270 -- Mark any messages suppressed by specific warnings as Deleted
1272 Cur := First_Error_Msg;
1273 while Cur /= No_Error_Msg loop
1274 if not Errors.Table (Cur).Deleted
1275 and then Warning_Specifically_Suppressed
1276 (Errors.Table (Cur).Sptr, Errors.Table (Cur).Text)
1278 Delete_Warning (Cur);
1280 -- If this is a continuation, delete previous messages
1283 while Errors.Table (F).Msg_Cont loop
1284 F := Errors.Table (F).Prev;
1288 -- Delete any following continuations
1292 F := Errors.Table (F).Next;
1293 exit when F = No_Error_Msg;
1294 exit when not Errors.Table (F).Msg_Cont;
1299 Cur := Errors.Table (Cur).Next;
1302 Finalize_Called := True;
1304 -- Check consistency of specific warnings (may add warnings). We only
1305 -- do this on the last call, after all possible warnings are posted.
1308 Validate_Specific_Warnings (Error_Msg'Access);
1316 function First_Node (C : Node_Id) return Node_Id is
1317 Orig : constant Node_Id := Original_Node (C);
1318 Loc : constant Source_Ptr := Sloc (Orig);
1319 Sfile : constant Source_File_Index := Get_Source_File_Index (Loc);
1323 function Test_Earlier (N : Node_Id) return Traverse_Result;
1324 -- Function applied to every node in the construct
1326 procedure Search_Tree_First is new Traverse_Proc (Test_Earlier);
1327 -- Create traversal procedure
1333 function Test_Earlier (N : Node_Id) return Traverse_Result is
1334 Norig : constant Node_Id := Original_Node (N);
1335 Loc : constant Source_Ptr := Sloc (Norig);
1338 -- Check for earlier
1342 -- Ignore nodes with no useful location information
1344 and then Loc /= Standard_Location
1345 and then Loc /= No_Location
1347 -- Ignore nodes from a different file. This ensures against cases
1348 -- of strange foreign code somehow being present. We don't want
1349 -- wild placement of messages if that happens.
1351 and then Get_Source_File_Index (Loc) = Sfile
1360 -- Start of processing for First_Node
1363 if Nkind (Orig) in N_Subexpr then
1366 Search_Tree_First (Orig);
1378 function First_Sloc (N : Node_Id) return Source_Ptr is
1379 SI : constant Source_File_Index := Source_Index (Get_Source_Unit (N));
1380 SF : constant Source_Ptr := Source_First (SI);
1385 F := First_Node (N);
1388 -- The following circuit is a bit subtle. When we have parenthesized
1389 -- expressions, then the Sloc will not record the location of the paren,
1390 -- but we would like to post the flag on the paren. So what we do is to
1391 -- crawl up the tree from the First_Node, adjusting the Sloc value for
1392 -- any parentheses we know are present. Yes, we know this circuit is not
1393 -- 100% reliable (e.g. because we don't record all possible paren level
1394 -- values), but this is only for an error message so it is good enough.
1397 Paren_Loop : for J in 1 .. Paren_Count (F) loop
1399 -- We don't look more than 12 characters behind the current
1400 -- location, and in any case not past the front of the source.
1402 Search_Loop : for K in 1 .. 12 loop
1403 exit Search_Loop when S = SF;
1405 if Source_Text (SI) (S - 1) = '(' then
1409 elsif Source_Text (SI) (S - 1) <= ' ' then
1415 end loop Search_Loop;
1416 end loop Paren_Loop;
1418 exit Node_Loop when F = N;
1420 exit Node_Loop when Nkind (F) not in N_Subexpr;
1430 procedure Initialize is
1433 First_Error_Msg := No_Error_Msg;
1434 Last_Error_Msg := No_Error_Msg;
1435 Serious_Errors_Detected := 0;
1436 Total_Errors_Detected := 0;
1437 Warnings_Detected := 0;
1438 Cur_Msg := No_Error_Msg;
1441 -- Initialize warnings table, if all warnings are suppressed, supply an
1442 -- initial dummy entry covering all possible source locations.
1445 Specific_Warnings.Init;
1447 if Warning_Mode = Suppress then
1449 ((Start => Source_Ptr'First, Stop => Source_Ptr'Last));
1457 function No_Warnings (N : Node_Or_Entity_Id) return Boolean is
1459 if Error_Posted (N) then
1462 elsif Nkind (N) in N_Entity and then Has_Warnings_Off (N) then
1465 elsif Is_Entity_Name (N)
1466 and then Present (Entity (N))
1467 and then Has_Warnings_Off (Entity (N))
1480 function OK_Node (N : Node_Id) return Boolean is
1481 K : constant Node_Kind := Nkind (N);
1484 if Error_Posted (N) then
1487 elsif K in N_Has_Etype
1488 and then Present (Etype (N))
1489 and then Error_Posted (Etype (N))
1494 or else K = N_Attribute_Reference
1495 or else K = N_Character_Literal
1496 or else K = N_Expanded_Name
1497 or else K = N_Identifier
1498 or else K = N_Operator_Symbol)
1499 and then Present (Entity (N))
1500 and then Error_Posted (Entity (N))
1508 ---------------------
1509 -- Output_Messages --
1510 ---------------------
1512 procedure Output_Messages is
1516 procedure Write_Error_Summary;
1517 -- Write error summary
1519 procedure Write_Header (Sfile : Source_File_Index);
1520 -- Write header line (compiling or checking given file)
1522 procedure Write_Max_Errors;
1523 -- Write message if max errors reached
1525 -------------------------
1526 -- Write_Error_Summary --
1527 -------------------------
1529 procedure Write_Error_Summary is
1531 -- Extra blank line if error messages or source listing were output
1533 if Total_Errors_Detected + Warnings_Detected > 0
1539 -- Message giving number of lines read and number of errors detected.
1540 -- This normally goes to Standard_Output. The exception is when brief
1541 -- mode is not set, verbose mode (or full list mode) is set, and
1542 -- there are errors. In this case we send the message to standard
1543 -- error to make sure that *something* appears on standard error in
1544 -- an error situation.
1546 -- Formerly, only the "# errors" suffix was sent to stderr, whereas
1547 -- "# lines:" appeared on stdout. This caused problems on VMS when
1548 -- the stdout buffer was flushed, giving an extra line feed after
1551 if Total_Errors_Detected + Warnings_Detected /= 0
1552 and then not Brief_Output
1553 and then (Verbose_Mode or Full_List)
1558 -- Message giving total number of lines
1561 Write_Int (Num_Source_Lines (Main_Source_File));
1563 if Num_Source_Lines (Main_Source_File) = 1 then
1564 Write_Str (" line: ");
1566 Write_Str (" lines: ");
1569 if Total_Errors_Detected = 0 then
1570 Write_Str ("No errors");
1572 elsif Total_Errors_Detected = 1 then
1573 Write_Str ("1 error");
1576 Write_Int (Total_Errors_Detected);
1577 Write_Str (" errors");
1580 if Warnings_Detected /= 0 then
1582 Write_Int (Warnings_Detected);
1583 Write_Str (" warning");
1585 if Warnings_Detected /= 1 then
1589 if Warning_Mode = Treat_As_Error then
1590 Write_Str (" (treated as error");
1592 if Warnings_Detected /= 1 then
1601 Set_Standard_Output;
1602 end Write_Error_Summary;
1608 procedure Write_Header (Sfile : Source_File_Index) is
1610 if Verbose_Mode or Full_List then
1611 if Original_Operating_Mode = Generate_Code then
1612 Write_Str ("Compiling: ");
1614 Write_Str ("Checking: ");
1617 Write_Name (Full_File_Name (Sfile));
1619 if not Debug_Flag_7 then
1620 Write_Str (" (source file time stamp: ");
1621 Write_Time_Stamp (Sfile);
1629 ----------------------
1630 -- Write_Max_Errors --
1631 ----------------------
1633 procedure Write_Max_Errors is
1635 if Maximum_Messages /= 0 then
1636 if Warnings_Detected >= Maximum_Messages then
1638 Write_Line ("maximum number of warnings output");
1639 Write_Line ("any further warnings suppressed");
1640 Set_Standard_Output;
1643 -- If too many errors print message
1645 if Total_Errors_Detected >= Maximum_Messages then
1647 Write_Line ("fatal error: maximum number of errors detected");
1648 Set_Standard_Output;
1651 end Write_Max_Errors;
1653 -- Start of processing for Output_Messages
1656 -- Error if Finalize has not been called
1658 if not Finalize_Called then
1659 raise Program_Error;
1662 -- Reset current error source file if the main unit has a pragma
1663 -- Source_Reference. This ensures outputting the proper name of
1664 -- the source file in this situation.
1666 if Main_Source_File = No_Source_File
1667 or else Num_SRef_Pragmas (Main_Source_File) /= 0
1669 Current_Error_Source_File := No_Source_File;
1674 if Brief_Output or (not Full_List and not Verbose_Mode) then
1677 E := First_Error_Msg;
1678 while E /= No_Error_Msg loop
1679 if not Errors.Table (E).Deleted and then not Debug_Flag_KK then
1680 if Full_Path_Name_For_Brief_Errors then
1681 Write_Name (Full_Ref_Name (Errors.Table (E).Sfile));
1683 Write_Name (Reference_Name (Errors.Table (E).Sfile));
1687 Write_Int (Int (Physical_To_Logical
1688 (Errors.Table (E).Line,
1689 Errors.Table (E).Sfile)));
1692 if Errors.Table (E).Col < 10 then
1696 Write_Int (Int (Errors.Table (E).Col));
1698 Output_Msg_Text (E);
1702 E := Errors.Table (E).Next;
1705 Set_Standard_Output;
1708 -- Full source listing case
1711 List_Pragmas_Index := 1;
1712 List_Pragmas_Mode := True;
1713 E := First_Error_Msg;
1715 -- Normal case, to stdout (copyright notice already output)
1717 if Full_List_File_Name = null then
1718 if not Debug_Flag_7 then
1725 Create_List_File_Access.all (Full_List_File_Name.all);
1726 Set_Special_Output (Write_List_Info_Access.all'Access);
1728 -- Write copyright notice to file
1730 if not Debug_Flag_7 then
1731 Write_Str ("GNAT ");
1732 Write_Str (Gnat_Version_String);
1734 Write_Str ("Copyright 1992-" &
1736 ", Free Software Foundation, Inc.");
1741 -- First list extended main source file units with errors
1743 for U in Main_Unit .. Last_Unit loop
1744 if In_Extended_Main_Source_Unit (Cunit_Entity (U))
1746 -- If debug flag d.m is set, only the main source is listed
1748 and then (U = Main_Unit or else not Debug_Flag_Dot_M)
1750 -- If the unit of the entity does not come from source, it is
1751 -- an implicit subprogram declaration for a child subprogram.
1752 -- Do not emit errors for it, they are listed with the body.
1755 (No (Cunit_Entity (U))
1756 or else Comes_From_Source (Cunit_Entity (U))
1757 or else not Is_Subprogram (Cunit_Entity (U)))
1760 Sfile : constant Source_File_Index := Source_Index (U);
1764 Write_Header (Sfile);
1767 -- Normally, we don't want an "error messages from file"
1768 -- message when listing the entire file, so we set the
1769 -- current source file as the current error source file.
1770 -- However, the old style of doing things was to list this
1771 -- message if pragma Source_Reference is present, even for
1772 -- the main unit. Since the purpose of the -gnatd.m switch
1773 -- is to duplicate the old behavior, we skip the reset if
1774 -- this debug flag is set.
1776 if not Debug_Flag_Dot_M then
1777 Current_Error_Source_File := Sfile;
1780 for N in 1 .. Last_Source_Line (Sfile) loop
1781 while E /= No_Error_Msg
1782 and then Errors.Table (E).Deleted
1784 E := Errors.Table (E).Next;
1789 and then Errors.Table (E).Line = N
1790 and then Errors.Table (E).Sfile = Sfile;
1792 Output_Source_Line (N, Sfile, Err_Flag);
1795 Output_Error_Msgs (E);
1797 if not Debug_Flag_2 then
1806 -- Then output errors, if any, for subsidiary units not in the
1807 -- main extended unit.
1809 -- Note: if debug flag d.m set, include errors for any units other
1810 -- than the main unit in the extended source unit (e.g. spec and
1811 -- subunits for a body).
1813 while E /= No_Error_Msg
1814 and then (not In_Extended_Main_Source_Unit (Errors.Table (E).Sptr)
1817 and then Get_Source_Unit
1818 (Errors.Table (E).Sptr) /= Main_Unit))
1820 if Errors.Table (E).Deleted then
1821 E := Errors.Table (E).Next;
1826 (Errors.Table (E).Line, Errors.Table (E).Sfile, True);
1827 Output_Error_Msgs (E);
1831 -- If output to file, write extra copy of error summary to the
1832 -- output file, and then close it.
1834 if Full_List_File_Name /= null then
1835 Write_Error_Summary;
1837 Close_List_File_Access.all;
1838 Cancel_Special_Output;
1842 -- Verbose mode (error lines only with error flags). Normally this is
1843 -- ignored in full list mode, unless we are listing to a file, in which
1844 -- case we still generate -gnatv output to standard output.
1847 and then (not Full_List or else Full_List_File_Name /= null)
1850 Write_Header (Main_Source_File);
1851 E := First_Error_Msg;
1853 -- Loop through error lines
1855 while E /= No_Error_Msg loop
1856 if Errors.Table (E).Deleted then
1857 E := Errors.Table (E).Next;
1861 (Errors.Table (E).Line, Errors.Table (E).Sfile, True);
1862 Output_Error_Msgs (E);
1867 -- Output error summary if verbose or full list mode
1869 if Verbose_Mode or else Full_List then
1870 Write_Error_Summary;
1875 if Warning_Mode = Treat_As_Error then
1876 Total_Errors_Detected := Total_Errors_Detected + Warnings_Detected;
1877 Warnings_Detected := 0;
1879 end Output_Messages;
1881 ------------------------
1882 -- Output_Source_Line --
1883 ------------------------
1885 procedure Output_Source_Line
1886 (L : Physical_Line_Number;
1887 Sfile : Source_File_Index;
1893 Line_Number_Output : Boolean := False;
1894 -- Set True once line number is output
1896 Empty_Line : Boolean := True;
1897 -- Set False if line includes at least one character
1900 if Sfile /= Current_Error_Source_File then
1901 Write_Str ("==============Error messages for ");
1903 case Sinput.File_Type (Sfile) is
1905 Write_Str ("source");
1907 when Sinput.Config =>
1908 Write_Str ("configuration pragmas");
1911 Write_Str ("symbol definition");
1913 when Sinput.Preproc =>
1914 Write_Str ("preprocessing data");
1917 Write_Str (" file: ");
1918 Write_Name (Full_File_Name (Sfile));
1921 if Num_SRef_Pragmas (Sfile) > 0 then
1922 Write_Str ("--------------Line numbers from file: ");
1923 Write_Name (Full_Ref_Name (Sfile));
1924 Write_Str (" (starting at line ");
1925 Write_Int (Int (First_Mapped_Line (Sfile)));
1930 Current_Error_Source_File := Sfile;
1933 if Errs or List_Pragmas_Mode then
1934 Output_Line_Number (Physical_To_Logical (L, Sfile));
1935 Line_Number_Output := True;
1938 S := Line_Start (L, Sfile);
1941 C := Source_Text (Sfile) (S);
1942 exit when C = ASCII.LF or else C = ASCII.CR or else C = EOF;
1944 -- Deal with matching entry in List_Pragmas table
1947 and then List_Pragmas_Index <= List_Pragmas.Last
1948 and then S = List_Pragmas.Table (List_Pragmas_Index).Ploc
1950 case List_Pragmas.Table (List_Pragmas_Index).Ptyp is
1954 -- Ignore if on line with errors so that error flags
1955 -- get properly listed with the error line .
1958 Write_Char (ASCII.FF);
1962 List_Pragmas_Mode := True;
1964 if not Line_Number_Output then
1965 Output_Line_Number (Physical_To_Logical (L, Sfile));
1966 Line_Number_Output := True;
1973 List_Pragmas_Mode := False;
1976 List_Pragmas_Index := List_Pragmas_Index + 1;
1978 -- Normal case (no matching entry in List_Pragmas table)
1981 if Errs or List_Pragmas_Mode then
1986 Empty_Line := False;
1990 -- If we have output a source line, then add the line terminator, with
1991 -- training spaces preserved (so we output the line exactly as input).
1993 if Line_Number_Output then
1997 Write_Eol_Keep_Blanks;
2000 end Output_Source_Line;
2002 -----------------------------
2003 -- Remove_Warning_Messages --
2004 -----------------------------
2006 procedure Remove_Warning_Messages (N : Node_Id) is
2008 function Check_For_Warning (N : Node_Id) return Traverse_Result;
2009 -- This function checks one node for a possible warning message
2011 function Check_All_Warnings is new Traverse_Func (Check_For_Warning);
2012 -- This defines the traversal operation
2014 -----------------------
2015 -- Check_For_Warning --
2016 -----------------------
2018 function Check_For_Warning (N : Node_Id) return Traverse_Result is
2019 Loc : constant Source_Ptr := Sloc (N);
2022 function To_Be_Removed (E : Error_Msg_Id) return Boolean;
2023 -- Returns True for a message that is to be removed. Also adjusts
2024 -- warning count appropriately.
2030 function To_Be_Removed (E : Error_Msg_Id) return Boolean is
2032 if E /= No_Error_Msg
2034 -- Don't remove if location does not match
2036 and then Errors.Table (E).Optr = Loc
2038 -- Don't remove if not warning/info message. Note that we do
2039 -- not remove style messages here. They are warning messages
2040 -- but not ones we want removed in this context.
2042 and then Errors.Table (E).Warn
2044 -- Don't remove unconditional messages
2046 and then not Errors.Table (E).Uncond
2048 Warnings_Detected := Warnings_Detected - 1;
2051 -- No removal required
2058 -- Start of processing for Check_For_Warnings
2061 while To_Be_Removed (First_Error_Msg) loop
2062 First_Error_Msg := Errors.Table (First_Error_Msg).Next;
2065 if First_Error_Msg = No_Error_Msg then
2066 Last_Error_Msg := No_Error_Msg;
2069 E := First_Error_Msg;
2070 while E /= No_Error_Msg loop
2071 while To_Be_Removed (Errors.Table (E).Next) loop
2072 Errors.Table (E).Next :=
2073 Errors.Table (Errors.Table (E).Next).Next;
2075 if Errors.Table (E).Next = No_Error_Msg then
2076 Last_Error_Msg := E;
2080 E := Errors.Table (E).Next;
2083 if Nkind (N) = N_Raise_Constraint_Error
2084 and then Original_Node (N) /= N
2085 and then No (Condition (N))
2087 -- Warnings may have been posted on subexpressions of the original
2088 -- tree. We place the original node back on the tree to remove
2089 -- those warnings, whose sloc do not match those of any node in
2090 -- the current tree. Given that we are in unreachable code, this
2091 -- modification to the tree is harmless.
2094 Status : Traverse_Final_Result;
2097 if Is_List_Member (N) then
2098 Set_Condition (N, Original_Node (N));
2099 Status := Check_All_Warnings (Condition (N));
2101 Rewrite (N, Original_Node (N));
2102 Status := Check_All_Warnings (N);
2111 end Check_For_Warning;
2113 -- Start of processing for Remove_Warning_Messages
2116 if Warnings_Detected /= 0 then
2118 Discard : Traverse_Final_Result;
2119 pragma Warnings (Off, Discard);
2122 Discard := Check_All_Warnings (N);
2125 end Remove_Warning_Messages;
2127 procedure Remove_Warning_Messages (L : List_Id) is
2130 if Is_Non_Empty_List (L) then
2132 while Present (Stat) loop
2133 Remove_Warning_Messages (Stat);
2137 end Remove_Warning_Messages;
2139 ---------------------------
2140 -- Set_Identifier_Casing --
2141 ---------------------------
2143 procedure Set_Identifier_Casing
2144 (Identifier_Name : System.Address;
2145 File_Name : System.Address)
2147 Ident : constant Big_String_Ptr := To_Big_String_Ptr (Identifier_Name);
2148 File : constant Big_String_Ptr := To_Big_String_Ptr (File_Name);
2151 Desired_Case : Casing_Type := Mixed_Case;
2152 -- Casing required for result. Default value of Mixed_Case is used if
2153 -- for some reason we cannot find the right file name in the table.
2156 -- Get length of file name
2159 while File (Flen + 1) /= ASCII.NUL loop
2163 -- Loop through file names to find matching one. This is a bit slow, but
2164 -- we only do it in error situations so it is not so terrible. Note that
2165 -- if the loop does not exit, then the desired case will be left set to
2166 -- Mixed_Case, this can happen if the name was not in canonical form,
2167 -- and gets canonicalized on VMS. Possibly we could fix this by
2168 -- unconditionally canonicalizing these names ???
2170 for J in 1 .. Last_Source_File loop
2171 Get_Name_String (Full_Debug_Name (J));
2174 and then Name_Buffer (1 .. Name_Len) = String (File (1 .. Flen))
2176 Desired_Case := Identifier_Casing (J);
2181 -- Copy identifier as given to Name_Buffer
2183 for J in Name_Buffer'Range loop
2184 Name_Buffer (J) := Ident (J);
2186 if Name_Buffer (J) = ASCII.NUL then
2192 Set_Casing (Desired_Case);
2193 end Set_Identifier_Casing;
2195 -----------------------
2196 -- Set_Ignore_Errors --
2197 -----------------------
2199 procedure Set_Ignore_Errors (To : Boolean) is
2201 Errors_Must_Be_Ignored := To;
2202 end Set_Ignore_Errors;
2204 ------------------------------
2205 -- Set_Msg_Insertion_Column --
2206 ------------------------------
2208 procedure Set_Msg_Insertion_Column is
2210 if RM_Column_Check then
2211 Set_Msg_Str (" in column ");
2212 Set_Msg_Int (Int (Error_Msg_Col) + 1);
2214 end Set_Msg_Insertion_Column;
2216 ----------------------------
2217 -- Set_Msg_Insertion_Node --
2218 ----------------------------
2220 procedure Set_Msg_Insertion_Node is
2225 Error_Msg_Node_1 = Error
2226 or else Error_Msg_Node_1 = Any_Type;
2228 if Error_Msg_Node_1 = Empty then
2229 Set_Msg_Blank_Conditional;
2230 Set_Msg_Str ("<empty>");
2232 elsif Error_Msg_Node_1 = Error then
2234 Set_Msg_Str ("<error>");
2236 elsif Error_Msg_Node_1 = Standard_Void_Type then
2238 Set_Msg_Str ("procedure name");
2241 Set_Msg_Blank_Conditional;
2245 K := Nkind (Error_Msg_Node_1);
2247 -- If we have operator case, skip quotes since name of operator
2248 -- itself will supply the required quotations. An operator can be an
2249 -- applied use in an expression or an explicit operator symbol, or an
2250 -- identifier whose name indicates it is an operator.
2253 or else K = N_Operator_Symbol
2254 or else K = N_Defining_Operator_Symbol
2255 or else ((K = N_Identifier or else K = N_Defining_Identifier)
2256 and then Is_Operator_Name (Chars (Error_Msg_Node_1)))
2258 Set_Msg_Node (Error_Msg_Node_1);
2260 -- Normal case, not an operator, surround with quotes
2264 Set_Qualification (Error_Msg_Qual_Level, Error_Msg_Node_1);
2265 Set_Msg_Node (Error_Msg_Node_1);
2270 -- The following assignment ensures that a second ampersand insertion
2271 -- character will correspond to the Error_Msg_Node_2 parameter. We
2272 -- suppress possible validity checks in case operating in -gnatVa mode,
2273 -- and Error_Msg_Node_2 is not needed and has not been set.
2276 pragma Suppress (Range_Check);
2278 Error_Msg_Node_1 := Error_Msg_Node_2;
2280 end Set_Msg_Insertion_Node;
2282 --------------------------------------
2283 -- Set_Msg_Insertion_Type_Reference --
2284 --------------------------------------
2286 procedure Set_Msg_Insertion_Type_Reference (Flag : Source_Ptr) is
2292 if Error_Msg_Node_1 = Standard_Void_Type then
2293 Set_Msg_Str ("package or procedure name");
2296 elsif Error_Msg_Node_1 = Standard_Exception_Type then
2297 Set_Msg_Str ("exception name");
2300 elsif Error_Msg_Node_1 = Any_Access
2301 or else Error_Msg_Node_1 = Any_Array
2302 or else Error_Msg_Node_1 = Any_Boolean
2303 or else Error_Msg_Node_1 = Any_Character
2304 or else Error_Msg_Node_1 = Any_Composite
2305 or else Error_Msg_Node_1 = Any_Discrete
2306 or else Error_Msg_Node_1 = Any_Fixed
2307 or else Error_Msg_Node_1 = Any_Integer
2308 or else Error_Msg_Node_1 = Any_Modular
2309 or else Error_Msg_Node_1 = Any_Numeric
2310 or else Error_Msg_Node_1 = Any_Real
2311 or else Error_Msg_Node_1 = Any_Scalar
2312 or else Error_Msg_Node_1 = Any_String
2314 Get_Unqualified_Decoded_Name_String (Chars (Error_Msg_Node_1));
2315 Set_Msg_Name_Buffer;
2318 elsif Error_Msg_Node_1 = Universal_Real then
2319 Set_Msg_Str ("type universal real");
2322 elsif Error_Msg_Node_1 = Universal_Integer then
2323 Set_Msg_Str ("type universal integer");
2326 elsif Error_Msg_Node_1 = Universal_Fixed then
2327 Set_Msg_Str ("type universal fixed");
2331 -- Special case of anonymous array
2333 if Nkind (Error_Msg_Node_1) in N_Entity
2334 and then Is_Array_Type (Error_Msg_Node_1)
2335 and then Present (Related_Array_Object (Error_Msg_Node_1))
2337 Set_Msg_Str ("type of ");
2338 Set_Msg_Node (Related_Array_Object (Error_Msg_Node_1));
2339 Set_Msg_Str (" declared");
2340 Set_Msg_Insertion_Line_Number
2341 (Sloc (Related_Array_Object (Error_Msg_Node_1)), Flag);
2345 -- If we fall through, it is not a special case, so first output
2346 -- the name of the type, preceded by private for a private type
2348 if Is_Private_Type (Error_Msg_Node_1) then
2349 Set_Msg_Str ("private type ");
2351 Set_Msg_Str ("type ");
2354 Ent := Error_Msg_Node_1;
2356 if Is_Internal_Name (Chars (Ent)) then
2357 Unwind_Internal_Type (Ent);
2360 -- Types in Standard are displayed as "Standard.name"
2362 if Sloc (Ent) <= Standard_Location then
2364 Set_Msg_Str ("Standard.");
2369 -- Types in other language defined units are displayed as
2370 -- "package-name.type-name"
2373 Is_Predefined_File_Name (Unit_File_Name (Get_Source_Unit (Ent)))
2375 Get_Unqualified_Decoded_Name_String
2376 (Unit_Name (Get_Source_Unit (Ent)));
2377 Name_Len := Name_Len - 2;
2379 Set_Casing (Mixed_Case);
2380 Set_Msg_Name_Buffer;
2382 Set_Casing (Mixed_Case);
2387 -- All other types display as "type name" defined at line xxx
2388 -- possibly qualified if qualification is requested.
2392 Set_Qualification (Error_Msg_Qual_Level, Ent);
2396 -- If Ent is an anonymous subprogram type, there is no name to print,
2397 -- so remove enclosing quotes.
2399 if Buffer_Ends_With ("""") then
2400 Buffer_Remove ("""");
2406 -- If the original type did not come from a predefined file, add the
2407 -- location where the type was defined.
2409 if Sloc (Error_Msg_Node_1) > Standard_Location
2411 not Is_Predefined_File_Name
2412 (Unit_File_Name (Get_Source_Unit (Error_Msg_Node_1)))
2414 Set_Msg_Str (" defined");
2415 Set_Msg_Insertion_Line_Number (Sloc (Error_Msg_Node_1), Flag);
2417 -- If it did come from a predefined file, deal with the case where
2418 -- this was a file with a generic instantiation from elsewhere.
2421 if Sloc (Error_Msg_Node_1) > Standard_Location then
2423 Iloc : constant Source_Ptr :=
2424 Instantiation_Location (Sloc (Error_Msg_Node_1));
2427 if Iloc /= No_Location
2428 and then not Suppress_Instance_Location
2430 Set_Msg_Str (" from instance");
2431 Set_Msg_Insertion_Line_Number (Iloc, Flag);
2436 end Set_Msg_Insertion_Type_Reference;
2438 ---------------------------------
2439 -- Set_Msg_Insertion_Unit_Name --
2440 ---------------------------------
2442 procedure Set_Msg_Insertion_Unit_Name (Suffix : Boolean := True) is
2444 if Error_Msg_Unit_1 = No_Unit_Name then
2447 elsif Error_Msg_Unit_1 = Error_Unit_Name then
2449 Set_Msg_Str ("<error>");
2452 Get_Unit_Name_String (Error_Msg_Unit_1, Suffix);
2455 Set_Msg_Name_Buffer;
2459 -- The following assignment ensures that a second percent insertion
2460 -- character will correspond to the Error_Msg_Unit_2 parameter. We
2461 -- suppress possible validity checks in case operating in -gnatVa mode,
2462 -- and Error_Msg_Unit_2 is not needed and has not been set.
2465 pragma Suppress (Range_Check);
2467 Error_Msg_Unit_1 := Error_Msg_Unit_2;
2469 end Set_Msg_Insertion_Unit_Name;
2475 procedure Set_Msg_Node (Node : Node_Id) is
2480 if Nkind (Node) = N_Designator then
2481 Set_Msg_Node (Name (Node));
2483 Set_Msg_Node (Identifier (Node));
2486 elsif Nkind (Node) = N_Defining_Program_Unit_Name then
2487 Set_Msg_Node (Name (Node));
2489 Set_Msg_Node (Defining_Identifier (Node));
2492 elsif Nkind (Node) = N_Selected_Component then
2493 Set_Msg_Node (Prefix (Node));
2495 Set_Msg_Node (Selector_Name (Node));
2499 -- The only remaining possibilities are identifiers, defining
2500 -- identifiers, pragmas, and pragma argument associations.
2502 if Nkind (Node) = N_Pragma then
2503 Nam := Pragma_Name (Node);
2505 -- The other cases have Chars fields, and we want to test for possible
2506 -- internal names, which generally represent something gone wrong. An
2507 -- exception is the case of internal type names, where we try to find a
2508 -- reasonable external representation for the external name
2510 elsif Is_Internal_Name (Chars (Node))
2512 ((Is_Entity_Name (Node)
2513 and then Present (Entity (Node))
2514 and then Is_Type (Entity (Node)))
2516 (Nkind (Node) = N_Defining_Identifier and then Is_Type (Node)))
2518 if Nkind (Node) = N_Identifier then
2519 Ent := Entity (Node);
2524 -- If the type is the designated type of an access_to_subprogram,
2525 -- there is no name to provide in the call.
2527 if Ekind (Ent) = E_Subprogram_Type then
2530 Unwind_Internal_Type (Ent);
2534 -- If not internal name, just use name in Chars field
2537 Nam := Chars (Node);
2540 -- At this stage, the name to output is in Nam
2542 Get_Unqualified_Decoded_Name_String (Nam);
2544 -- Remove trailing upper case letters from the name (useful for
2545 -- dealing with some cases of internal names.
2547 while Name_Len > 1 and then Name_Buffer (Name_Len) in 'A' .. 'Z' loop
2548 Name_Len := Name_Len - 1;
2551 -- If we have any of the names from standard that start with the
2552 -- characters "any " (e.g. Any_Type), then kill the message since
2553 -- almost certainly it is a junk cascaded message.
2556 and then Name_Buffer (1 .. 4) = "any "
2558 Kill_Message := True;
2561 -- Now we have to set the proper case. If we have a source location
2562 -- then do a check to see if the name in the source is the same name
2563 -- as the name in the Names table, except for possible differences
2564 -- in case, which is the case when we can copy from the source.
2567 Src_Loc : constant Source_Ptr := Sloc (Node);
2568 Sbuffer : Source_Buffer_Ptr;
2570 Src_Ptr : Source_Ptr;
2576 -- For standard locations, always use mixed case
2578 if Src_Loc <= No_Location
2579 or else Sloc (Node) <= No_Location
2581 Set_Casing (Mixed_Case);
2584 -- Determine if the reference we are dealing with corresponds to
2585 -- text at the point of the error reference. This will often be
2586 -- the case for simple identifier references, and is the case
2587 -- where we can copy the spelling from the source.
2589 Sbuffer := Source_Text (Get_Source_File_Index (Src_Loc));
2591 while Ref_Ptr <= Name_Len loop
2593 Fold_Lower (Sbuffer (Src_Ptr)) /=
2594 Fold_Lower (Name_Buffer (Ref_Ptr));
2595 Ref_Ptr := Ref_Ptr + 1;
2596 Src_Ptr := Src_Ptr + 1;
2599 -- If we get through the loop without a mismatch, then output the
2600 -- name the way it is spelled in the source program
2602 if Ref_Ptr > Name_Len then
2605 for J in 1 .. Name_Len loop
2606 Name_Buffer (J) := Sbuffer (Src_Ptr);
2607 Src_Ptr := Src_Ptr + 1;
2610 -- Otherwise set the casing using the default identifier casing
2613 Set_Casing (Identifier_Casing (Flag_Source), Mixed_Case);
2618 Set_Msg_Name_Buffer;
2626 procedure Set_Msg_Text (Text : String; Flag : Source_Ptr) is
2627 C : Character; -- Current character
2628 P : Natural; -- Current index;
2631 Manual_Quote_Mode := False;
2632 Is_Unconditional_Msg := False;
2634 Flag_Source := Get_Source_File_Index (Flag);
2637 while P <= Text'Last loop
2641 -- Check for insertion character or sequence
2645 if P <= Text'Last and then Text (P) = '%' then
2647 Set_Msg_Insertion_Name_Literal;
2649 Set_Msg_Insertion_Name;
2653 if P <= Text'Last and then Text (P) = '$' then
2655 Set_Msg_Insertion_Unit_Name (Suffix => False);
2657 Set_Msg_Insertion_Unit_Name;
2661 Set_Msg_Insertion_File_Name;
2664 Set_Msg_Insertion_Type_Reference (Flag);
2667 Set_Msg_Insertion_Reserved_Name;
2670 Set_Msg_Insertion_Node;
2673 Set_Msg_Insertion_Line_Number (Error_Msg_Sloc, Flag);
2676 Continuation := True;
2678 if Text (P) = '\' then
2679 Continuation_New_Line := True;
2684 Set_Msg_Insertion_Column;
2687 Set_Msg_Insertion_Run_Time_Name;
2690 Set_Msg_Insertion_Uint;
2693 Manual_Quote_Mode := not Manual_Quote_Mode;
2697 Is_Unconditional_Msg := True;
2700 null; -- already dealt with
2703 null; -- already dealt with
2706 null; -- already dealt with
2709 Set_Msg_Char (Text (P));
2713 Set_Msg_Str (Error_Msg_String (1 .. Error_Msg_Strlen));
2715 -- Upper case letter
2719 -- Start of reserved word if two or more
2721 if P <= Text'Last and then Text (P) in 'A' .. 'Z' then
2723 Set_Msg_Insertion_Reserved_Word (Text, P);
2725 -- Single upper case letter is just inserted
2731 -- Normal character with no special treatment
2745 procedure Set_Posted (N : Node_Id) is
2749 if Is_Serious_Error then
2751 -- We always set Error_Posted on the node itself
2753 Set_Error_Posted (N);
2755 -- If it is a subexpression, then set Error_Posted on parents up to
2756 -- and including the first non-subexpression construct. This helps
2757 -- avoid cascaded error messages within a single expression.
2763 Set_Error_Posted (P);
2764 exit when Nkind (P) not in N_Subexpr;
2767 -- A special check, if we just posted an error on an attribute
2768 -- definition clause, then also set the entity involved as posted.
2769 -- For example, this stops complaining about the alignment after
2770 -- complaining about the size, which is likely to be useless.
2772 if Nkind (P) = N_Attribute_Definition_Clause then
2773 if Is_Entity_Name (Name (P)) then
2774 Set_Error_Posted (Entity (Name (P)));
2780 -----------------------
2781 -- Set_Qualification --
2782 -----------------------
2784 procedure Set_Qualification (N : Nat; E : Entity_Id) is
2786 if N /= 0 and then Scope (E) /= Standard_Standard then
2787 Set_Qualification (N - 1, Scope (E));
2788 Set_Msg_Node (Scope (E));
2791 end Set_Qualification;
2793 ------------------------
2794 -- Special_Msg_Delete --
2795 ------------------------
2797 -- Is it really right to have all this specialized knowledge in errout?
2799 function Special_Msg_Delete
2801 N : Node_Or_Entity_Id;
2802 E : Node_Or_Entity_Id) return Boolean
2805 -- Never delete messages in -gnatdO mode
2807 if Debug_Flag_OO then
2810 -- Processing for "atomic access cannot be guaranteed"
2812 elsif Msg = "atomic access to & cannot be guaranteed" then
2814 -- When an atomic object refers to a non-atomic type in the same
2815 -- scope, we implicitly make the type atomic. In the non-error case
2816 -- this is surely safe (and in fact prevents an error from occurring
2817 -- if the type is not atomic by default). But if the object cannot be
2818 -- made atomic, then we introduce an extra junk message by this
2819 -- manipulation, which we get rid of here.
2821 -- We identify this case by the fact that it references a type for
2822 -- which Is_Atomic is set, but there is no Atomic pragma setting it.
2825 and then Is_Atomic (E)
2826 and then No (Get_Rep_Pragma (E, Name_Atomic))
2831 -- Processing for "Size too small" messages
2833 elsif Msg = "size for& too small, minimum allowed is ^" then
2835 -- Suppress "size too small" errors in CodePeer mode and ALFA mode,
2836 -- since pragma Pack is also ignored in this configuration.
2838 if CodePeer_Mode or ALFA_Mode then
2841 -- When a size is wrong for a frozen type there is no explicit size
2842 -- clause, and other errors have occurred, suppress the message,
2843 -- since it is likely that this size error is a cascaded result of
2844 -- other errors. The reason we eliminate unfrozen types is that
2845 -- messages issued before the freeze type are for sure OK.
2848 and then Serious_Errors_Detected > 0
2849 and then Nkind (N) /= N_Component_Clause
2850 and then Nkind (Parent (N)) /= N_Component_Clause
2852 No (Get_Attribute_Definition_Clause (E, Attribute_Size))
2854 No (Get_Attribute_Definition_Clause (E, Attribute_Object_Size))
2856 No (Get_Attribute_Definition_Clause (E, Attribute_Value_Size))
2862 -- All special tests complete, so go ahead with message
2865 end Special_Msg_Delete;
2867 --------------------------
2868 -- Unwind_Internal_Type --
2869 --------------------------
2871 procedure Unwind_Internal_Type (Ent : in out Entity_Id) is
2872 Derived : Boolean := False;
2874 Old_Ent : Entity_Id;
2877 -- Undo placement of a quote, since we will put it back later
2879 Mchar := Msg_Buffer (Msglen);
2882 Msglen := Msglen - 1;
2885 -- The loop here deals with recursive types, we are trying to find a
2886 -- related entity that is not an implicit type. Note that the check with
2887 -- Old_Ent stops us from getting "stuck". Also, we don't output the
2888 -- "type derived from" message more than once in the case where we climb
2889 -- up multiple levels.
2894 -- Implicit access type, use directly designated type In Ada 2005,
2895 -- the designated type may be an anonymous access to subprogram, in
2896 -- which case we can only point to its definition.
2898 if Is_Access_Type (Ent) then
2899 if Ekind (Ent) = E_Access_Subprogram_Type
2900 or else Ekind (Ent) = E_Anonymous_Access_Subprogram_Type
2901 or else Is_Access_Protected_Subprogram_Type (Ent)
2903 Ent := Directly_Designated_Type (Ent);
2905 if not Comes_From_Source (Ent) then
2906 if Buffer_Ends_With ("type ") then
2907 Buffer_Remove ("type ");
2910 if Is_Itype (Ent) then
2912 Assoc : constant Node_Id :=
2913 Associated_Node_For_Itype (Ent);
2916 if Nkind (Assoc) in N_Subprogram_Specification then
2918 -- Anonymous access to subprogram in a signature.
2919 -- Indicate the enclosing subprogram.
2923 (Associated_Node_For_Itype (Ent));
2925 ("access to subprogram declared in profile of ");
2928 Set_Msg_Str ("access to subprogram with profile ");
2933 elsif Ekind (Ent) = E_Function then
2934 Set_Msg_Str ("access to function ");
2936 Set_Msg_Str ("access to procedure ");
2941 -- Type is access to object, named or anonymous
2944 Set_Msg_Str ("access to ");
2945 Ent := Directly_Designated_Type (Ent);
2950 elsif Is_Class_Wide_Type (Ent) then
2952 Ent := Root_Type (Ent);
2954 -- Use base type if this is a subtype
2956 elsif Ent /= Base_Type (Ent) then
2957 Buffer_Remove ("type ");
2959 -- Avoid duplication "subtype of subtype of", and also replace
2960 -- "derived from subtype of" simply by "derived from"
2962 if not Buffer_Ends_With ("subtype of ")
2963 and then not Buffer_Ends_With ("derived from ")
2965 Set_Msg_Str ("subtype of ");
2968 Ent := Base_Type (Ent);
2970 -- If this is a base type with a first named subtype, use the first
2971 -- named subtype instead. This is not quite accurate in all cases,
2972 -- but it makes too much noise to be accurate and add 'Base in all
2973 -- cases. Note that we only do this is the first named subtype is not
2974 -- itself an internal name. This avoids the obvious loop (subtype ->
2975 -- basetype -> subtype) which would otherwise occur!)
2979 FST : constant Entity_Id := First_Subtype (Ent);
2982 if not Is_Internal_Name (Chars (FST)) then
2986 -- Otherwise use root type
2990 Buffer_Remove ("type ");
2992 -- Test for "subtype of type derived from" which seems
2993 -- excessive and is replaced by "type derived from".
2995 Buffer_Remove ("subtype of");
2997 -- Avoid duplicated "type derived from type derived from"
2999 if not Buffer_Ends_With ("type derived from ") then
3000 Set_Msg_Str ("type derived from ");
3011 -- If we are stuck in a loop, get out and settle for the internal
3012 -- name after all. In this case we set to kill the message if it is
3013 -- not the first error message (we really try hard not to show the
3014 -- dirty laundry of the implementation to the poor user!)
3016 if Ent = Old_Ent then
3017 Kill_Message := True;
3021 -- Get out if we finally found a non-internal name to use
3023 exit Find when not Is_Internal_Name (Chars (Ent));
3029 end Unwind_Internal_Type;
3035 procedure VMS_Convert is
3045 P := Msg_Buffer'First;
3051 if Msg_Buffer (P) = '-' then
3052 for G in Gnames'Range loop
3053 L := Gnames (G)'Length;
3055 -- See if we have "-ggg switch", where ggg is Gnames entry
3057 if P + L + 7 <= Msglen
3058 and then Msg_Buffer (P + 1 .. P + L) = Gnames (G).all
3059 and then Msg_Buffer (P + L + 1 .. P + L + 7) = " switch"
3061 -- Replace by "/vvv qualifier", where vvv is Vnames entry
3063 N := Vnames (G)'Length;
3064 Msg_Buffer (P + N + 11 .. Msglen + N - L + 3) :=
3065 Msg_Buffer (P + L + 8 .. Msglen);
3066 Msg_Buffer (P) := '/';
3067 Msg_Buffer (P + 1 .. P + N) := Vnames (G).all;
3068 Msg_Buffer (P + N + 1 .. P + N + 10) := " qualifier";
3070 Msglen := Msglen + N - L + 3;