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.
757 elsif No (Cunit (Main_Unit)) then
760 -- If the flag location is not in the main extended source unit, then
761 -- we want to eliminate the warning, unless it is in the extended
762 -- main code unit and we want warnings on the instance.
764 elsif In_Extended_Main_Code_Unit (Sptr) and then Warn_On_Instance then
767 -- Keep warning if debug flag G set
769 elsif Debug_Flag_GG then
772 -- Keep warning if message text ends in !!
774 elsif Msg (Msg'Last) = '!' and then Msg (Msg'Last - 1) = '!' then
777 -- Here is where we delete a warning from a with'ed unit
780 Cur_Msg := No_Error_Msg;
782 if not Continuation then
790 -- If message is to be ignored in special ignore message mode, this is
791 -- where we do this special processing, bypassing message output.
793 if Ignore_Errors_Enable > 0 then
794 if Is_Serious_Error then
795 Handle_Serious_Error;
801 -- If error message line length set, and this is a continuation message
802 -- then all we do is to append the text to the text of the last message
803 -- with a comma space separator (eliminating a possible (style) or
806 if Error_Msg_Line_Length /= 0
807 and then Continuation
809 Cur_Msg := Errors.Last;
812 Oldm : String_Ptr := Errors.Table (Cur_Msg).Text;
813 Newm : String (1 .. Oldm'Last + 2 + Msglen);
818 -- First copy old message to new one and free it
820 Newm (Oldm'Range) := Oldm.all;
824 -- Remove (style) or info: at start of message
826 if Msglen > 8 and then Msg_Buffer (1 .. 8) = "(style) " then
829 elsif Msglen > 6 and then Msg_Buffer (1 .. 6) = "info: " then
836 -- Now deal with separation between messages. Normally this is
837 -- simply comma space, but there are some special cases.
839 -- If continuation new line, then put actual NL character in msg
841 if Continuation_New_Line then
843 Newm (Newl) := ASCII.LF;
845 -- If continuation message is enclosed in parentheses, then
846 -- special treatment (don't need a comma, and we want to combine
847 -- successive parenthetical remarks into a single one with
848 -- separating commas).
850 elsif Msg_Buffer (M) = '(' and then Msg_Buffer (Msglen) = ')' then
852 -- Case where existing message ends in right paren, remove
853 -- and separate parenthetical remarks with a comma.
855 if Newm (Newl) = ')' then
857 Msg_Buffer (M) := ' ';
859 -- Case where we are adding new parenthetical comment
866 -- Case where continuation not in parens and no new line
869 Newm (Newl + 1 .. Newl + 2) := ", ";
873 -- Append new message
875 Newm (Newl + 1 .. Newl + Msglen - M + 1) :=
876 Msg_Buffer (M .. Msglen);
877 Newl := Newl + Msglen - M + 1;
878 Errors.Table (Cur_Msg).Text := new String'(Newm (1 .. Newl));
884 -- Otherwise build error message object for new message
887 ((Text => new String'(Msg_Buffer (1 .. Msglen)),
888 Next => No_Error_Msg,
889 Prev => No_Error_Msg,
892 Sfile => Get_Source_File_Index (Sptr),
893 Line => Get_Physical_Line_Number (Sptr),
894 Col => Get_Column_Number (Sptr),
895 Warn => Is_Warning_Msg,
896 Style => Is_Style_Msg,
897 Serious => Is_Serious_Error,
898 Uncond => Is_Unconditional_Msg,
899 Msg_Cont => Continuation,
901 Cur_Msg := Errors.Last;
903 -- If immediate errors mode set, output error message now. Also output
904 -- now if the -d1 debug flag is set (so node number message comes out
905 -- just before actual error message)
907 if Debug_Flag_OO or else Debug_Flag_1 then
910 (Errors.Table (Cur_Msg).Line, Errors.Table (Cur_Msg).Sfile, True);
912 Output_Error_Msgs (Temp_Msg);
914 -- If not in immediate errors mode, then we insert the message in the
915 -- error chain for later output by Finalize. The messages are sorted
916 -- first by unit (main unit comes first), and within a unit by source
917 -- location (earlier flag location first in the chain).
920 -- First a quick check, does this belong at the very end of the chain
921 -- of error messages. This saves a lot of time in the normal case if
922 -- there are lots of messages.
924 if Last_Error_Msg /= No_Error_Msg
925 and then Errors.Table (Cur_Msg).Sfile =
926 Errors.Table (Last_Error_Msg).Sfile
927 and then (Sptr > Errors.Table (Last_Error_Msg).Sptr
929 (Sptr = Errors.Table (Last_Error_Msg).Sptr
931 Optr > Errors.Table (Last_Error_Msg).Optr))
933 Prev_Msg := Last_Error_Msg;
934 Next_Msg := No_Error_Msg;
936 -- Otherwise do a full sequential search for the insertion point
939 Prev_Msg := No_Error_Msg;
940 Next_Msg := First_Error_Msg;
941 while Next_Msg /= No_Error_Msg loop
943 Errors.Table (Cur_Msg).Sfile < Errors.Table (Next_Msg).Sfile;
945 if Errors.Table (Cur_Msg).Sfile =
946 Errors.Table (Next_Msg).Sfile
948 exit when Sptr < Errors.Table (Next_Msg).Sptr
950 (Sptr = Errors.Table (Next_Msg).Sptr
952 Optr < Errors.Table (Next_Msg).Optr);
955 Prev_Msg := Next_Msg;
956 Next_Msg := Errors.Table (Next_Msg).Next;
960 -- Now we insert the new message in the error chain. The insertion
961 -- point for the message is after Prev_Msg and before Next_Msg.
963 -- The possible insertion point for the new message is after Prev_Msg
964 -- and before Next_Msg. However, this is where we do a special check
965 -- for redundant parsing messages, defined as messages posted on the
966 -- same line. The idea here is that probably such messages are junk
967 -- from the parser recovering. In full errors mode, we don't do this
968 -- deletion, but otherwise such messages are discarded at this stage.
970 if Prev_Msg /= No_Error_Msg
971 and then Errors.Table (Prev_Msg).Line =
972 Errors.Table (Cur_Msg).Line
973 and then Errors.Table (Prev_Msg).Sfile =
974 Errors.Table (Cur_Msg).Sfile
975 and then Compiler_State = Parsing
976 and then not All_Errors_Mode
978 -- Don't delete unconditional messages and at this stage, don't
979 -- delete continuation lines (we attempted to delete those earlier
980 -- if the parent message was deleted.
982 if not Errors.Table (Cur_Msg).Uncond
983 and then not Continuation
985 -- Don't delete if prev msg is warning and new msg is an error.
986 -- This is because we don't want a real error masked by a
987 -- warning. In all other cases (that is parse errors for the
988 -- same line that are not unconditional) we do delete the
989 -- message. This helps to avoid junk extra messages from
990 -- cascaded parsing errors
992 if not (Errors.Table (Prev_Msg).Warn
994 Errors.Table (Prev_Msg).Style)
996 (Errors.Table (Cur_Msg).Warn
998 Errors.Table (Cur_Msg).Style)
1000 -- All tests passed, delete the message by simply returning
1001 -- without any further processing.
1003 if not Continuation then
1004 Last_Killed := True;
1012 -- Come here if message is to be inserted in the error chain
1014 if not Continuation then
1015 Last_Killed := False;
1018 if Prev_Msg = No_Error_Msg then
1019 First_Error_Msg := Cur_Msg;
1021 Errors.Table (Prev_Msg).Next := Cur_Msg;
1024 Errors.Table (Cur_Msg).Next := Next_Msg;
1026 if Next_Msg = No_Error_Msg then
1027 Last_Error_Msg := Cur_Msg;
1031 -- Bump appropriate statistics count
1033 if Errors.Table (Cur_Msg).Warn or else Errors.Table (Cur_Msg).Style then
1034 Warnings_Detected := Warnings_Detected + 1;
1037 Total_Errors_Detected := Total_Errors_Detected + 1;
1039 if Errors.Table (Cur_Msg).Serious then
1040 Serious_Errors_Detected := Serious_Errors_Detected + 1;
1041 Handle_Serious_Error;
1045 -- If too many warnings turn off warnings
1047 if Maximum_Messages /= 0 then
1048 if Warnings_Detected = Maximum_Messages then
1049 Warning_Mode := Suppress;
1052 -- If too many errors abandon compilation
1054 if Total_Errors_Detected = Maximum_Messages then
1055 raise Unrecoverable_Error;
1058 end Error_Msg_Internal;
1064 procedure Error_Msg_N (Msg : String; N : Node_Or_Entity_Id) is
1066 Error_Msg_NEL (Msg, N, N, Sloc (N));
1073 procedure Error_Msg_NE
1075 N : Node_Or_Entity_Id;
1076 E : Node_Or_Entity_Id)
1079 Error_Msg_NEL (Msg, N, E, Sloc (N));
1086 procedure Error_Msg_NEL
1088 N : Node_Or_Entity_Id;
1089 E : Node_Or_Entity_Id;
1090 Flag_Location : Source_Ptr)
1093 if Special_Msg_Delete (Msg, N, E) then
1097 Test_Style_Warning_Serious_Msg (Msg);
1099 -- Special handling for warning messages
1101 if Is_Warning_Msg then
1103 -- Suppress if no warnings set for either entity or node
1105 if No_Warnings (N) or else No_Warnings (E) then
1107 -- Disable any continuation messages as well
1109 Last_Killed := True;
1113 -- Suppress if inside loop that is known to be null or is probably
1114 -- null (case where loop executes only if invalid values present).
1115 -- In either case warnings in the loop are likely to be junk.
1122 while Present (P) loop
1123 if Nkind (P) = N_Loop_Statement
1124 and then Suppress_Loop_Warnings (P)
1134 -- Test for message to be output
1137 or else Msg (Msg'Last) = '!'
1138 or else Is_Warning_Msg
1140 or else (Msg (Msg'First) = '\' and then not Last_Killed)
1143 Error_Msg_Node_1 := E;
1144 Error_Msg (Msg, Flag_Location);
1147 Last_Killed := True;
1150 if not (Is_Warning_Msg or Is_Style_Msg) then
1159 procedure Error_Msg_NW
1162 N : Node_Or_Entity_Id)
1166 and then In_Extended_Main_Source_Unit (N)
1167 and then Comes_From_Source (N)
1169 Error_Msg_NEL (Msg, N, N, Sloc (N));
1177 procedure Error_Msg_S (Msg : String) is
1179 Error_Msg (Msg, Scan_Ptr);
1186 procedure Error_Msg_SC (Msg : String) is
1188 -- If we are at end of file, post the flag after the previous token
1190 if Token = Tok_EOF then
1193 -- For all other cases the message is posted at the current token
1197 Error_Msg (Msg, Token_Ptr);
1205 procedure Error_Msg_SP (Msg : String) is
1207 -- Note: in the case where there is no previous token, Prev_Token_Ptr
1208 -- is set to Source_First, which is a reasonable position for the
1209 -- error flag in this situation
1211 Error_Msg (Msg, Prev_Token_Ptr);
1218 procedure Finalize (Last_Call : Boolean) is
1223 procedure Delete_Warning (E : Error_Msg_Id);
1224 -- Delete a message if not already deleted and adjust warning count
1226 --------------------
1227 -- Delete_Warning --
1228 --------------------
1230 procedure Delete_Warning (E : Error_Msg_Id) is
1232 if not Errors.Table (E).Deleted then
1233 Errors.Table (E).Deleted := True;
1234 Warnings_Detected := Warnings_Detected - 1;
1238 -- Start of message for Finalize
1241 -- Set Prev pointers
1243 Cur := First_Error_Msg;
1244 while Cur /= No_Error_Msg loop
1245 Nxt := Errors.Table (Cur).Next;
1246 exit when Nxt = No_Error_Msg;
1247 Errors.Table (Nxt).Prev := Cur;
1251 -- Eliminate any duplicated error messages from the list. This is
1252 -- done after the fact to avoid problems with Change_Error_Text.
1254 Cur := First_Error_Msg;
1255 while Cur /= No_Error_Msg loop
1256 Nxt := Errors.Table (Cur).Next;
1259 while F /= No_Error_Msg
1260 and then Errors.Table (F).Sptr = Errors.Table (Cur).Sptr
1262 Check_Duplicate_Message (Cur, F);
1263 F := Errors.Table (F).Next;
1269 -- Mark any messages suppressed by specific warnings as Deleted
1271 Cur := First_Error_Msg;
1272 while Cur /= No_Error_Msg loop
1273 if not Errors.Table (Cur).Deleted
1274 and then Warning_Specifically_Suppressed
1275 (Errors.Table (Cur).Sptr, Errors.Table (Cur).Text)
1277 Delete_Warning (Cur);
1279 -- If this is a continuation, delete previous messages
1282 while Errors.Table (F).Msg_Cont loop
1283 F := Errors.Table (F).Prev;
1287 -- Delete any following continuations
1291 F := Errors.Table (F).Next;
1292 exit when F = No_Error_Msg;
1293 exit when not Errors.Table (F).Msg_Cont;
1298 Cur := Errors.Table (Cur).Next;
1301 Finalize_Called := True;
1303 -- Check consistency of specific warnings (may add warnings). We only
1304 -- do this on the last call, after all possible warnings are posted.
1307 Validate_Specific_Warnings (Error_Msg'Access);
1315 function First_Node (C : Node_Id) return Node_Id is
1316 Orig : constant Node_Id := Original_Node (C);
1317 Loc : constant Source_Ptr := Sloc (Orig);
1318 Sfile : constant Source_File_Index := Get_Source_File_Index (Loc);
1322 function Test_Earlier (N : Node_Id) return Traverse_Result;
1323 -- Function applied to every node in the construct
1325 procedure Search_Tree_First is new Traverse_Proc (Test_Earlier);
1326 -- Create traversal procedure
1332 function Test_Earlier (N : Node_Id) return Traverse_Result is
1333 Norig : constant Node_Id := Original_Node (N);
1334 Loc : constant Source_Ptr := Sloc (Norig);
1337 -- Check for earlier
1341 -- Ignore nodes with no useful location information
1343 and then Loc /= Standard_Location
1344 and then Loc /= No_Location
1346 -- Ignore nodes from a different file. This ensures against cases
1347 -- of strange foreign code somehow being present. We don't want
1348 -- wild placement of messages if that happens.
1350 and then Get_Source_File_Index (Loc) = Sfile
1359 -- Start of processing for First_Node
1362 if Nkind (Orig) in N_Subexpr then
1365 Search_Tree_First (Orig);
1377 function First_Sloc (N : Node_Id) return Source_Ptr is
1378 SI : constant Source_File_Index := Source_Index (Get_Source_Unit (N));
1379 SF : constant Source_Ptr := Source_First (SI);
1384 F := First_Node (N);
1387 -- The following circuit is a bit subtle. When we have parenthesized
1388 -- expressions, then the Sloc will not record the location of the paren,
1389 -- but we would like to post the flag on the paren. So what we do is to
1390 -- crawl up the tree from the First_Node, adjusting the Sloc value for
1391 -- any parentheses we know are present. Yes, we know this circuit is not
1392 -- 100% reliable (e.g. because we don't record all possible paren level
1393 -- values), but this is only for an error message so it is good enough.
1396 Paren_Loop : for J in 1 .. Paren_Count (F) loop
1398 -- We don't look more than 12 characters behind the current
1399 -- location, and in any case not past the front of the source.
1401 Search_Loop : for K in 1 .. 12 loop
1402 exit Search_Loop when S = SF;
1404 if Source_Text (SI) (S - 1) = '(' then
1408 elsif Source_Text (SI) (S - 1) <= ' ' then
1414 end loop Search_Loop;
1415 end loop Paren_Loop;
1417 exit Node_Loop when F = N;
1419 exit Node_Loop when Nkind (F) not in N_Subexpr;
1429 procedure Initialize is
1432 First_Error_Msg := No_Error_Msg;
1433 Last_Error_Msg := No_Error_Msg;
1434 Serious_Errors_Detected := 0;
1435 Total_Errors_Detected := 0;
1436 Warnings_Detected := 0;
1437 Cur_Msg := No_Error_Msg;
1440 -- Initialize warnings table, if all warnings are suppressed, supply an
1441 -- initial dummy entry covering all possible source locations.
1444 Specific_Warnings.Init;
1446 if Warning_Mode = Suppress then
1448 ((Start => Source_Ptr'First, Stop => Source_Ptr'Last));
1456 function No_Warnings (N : Node_Or_Entity_Id) return Boolean is
1458 if Error_Posted (N) then
1461 elsif Nkind (N) in N_Entity and then Has_Warnings_Off (N) then
1464 elsif Is_Entity_Name (N)
1465 and then Present (Entity (N))
1466 and then Has_Warnings_Off (Entity (N))
1479 function OK_Node (N : Node_Id) return Boolean is
1480 K : constant Node_Kind := Nkind (N);
1483 if Error_Posted (N) then
1486 elsif K in N_Has_Etype
1487 and then Present (Etype (N))
1488 and then Error_Posted (Etype (N))
1493 or else K = N_Attribute_Reference
1494 or else K = N_Character_Literal
1495 or else K = N_Expanded_Name
1496 or else K = N_Identifier
1497 or else K = N_Operator_Symbol)
1498 and then Present (Entity (N))
1499 and then Error_Posted (Entity (N))
1507 ---------------------
1508 -- Output_Messages --
1509 ---------------------
1511 procedure Output_Messages is
1515 procedure Write_Error_Summary;
1516 -- Write error summary
1518 procedure Write_Header (Sfile : Source_File_Index);
1519 -- Write header line (compiling or checking given file)
1521 procedure Write_Max_Errors;
1522 -- Write message if max errors reached
1524 -------------------------
1525 -- Write_Error_Summary --
1526 -------------------------
1528 procedure Write_Error_Summary is
1530 -- Extra blank line if error messages or source listing were output
1532 if Total_Errors_Detected + Warnings_Detected > 0
1538 -- Message giving number of lines read and number of errors detected.
1539 -- This normally goes to Standard_Output. The exception is when brief
1540 -- mode is not set, verbose mode (or full list mode) is set, and
1541 -- there are errors. In this case we send the message to standard
1542 -- error to make sure that *something* appears on standard error in
1543 -- an error situation.
1545 -- Formerly, only the "# errors" suffix was sent to stderr, whereas
1546 -- "# lines:" appeared on stdout. This caused problems on VMS when
1547 -- the stdout buffer was flushed, giving an extra line feed after
1550 if Total_Errors_Detected + Warnings_Detected /= 0
1551 and then not Brief_Output
1552 and then (Verbose_Mode or Full_List)
1557 -- Message giving total number of lines
1560 Write_Int (Num_Source_Lines (Main_Source_File));
1562 if Num_Source_Lines (Main_Source_File) = 1 then
1563 Write_Str (" line: ");
1565 Write_Str (" lines: ");
1568 if Total_Errors_Detected = 0 then
1569 Write_Str ("No errors");
1571 elsif Total_Errors_Detected = 1 then
1572 Write_Str ("1 error");
1575 Write_Int (Total_Errors_Detected);
1576 Write_Str (" errors");
1579 if Warnings_Detected /= 0 then
1581 Write_Int (Warnings_Detected);
1582 Write_Str (" warning");
1584 if Warnings_Detected /= 1 then
1588 if Warning_Mode = Treat_As_Error then
1589 Write_Str (" (treated as error");
1591 if Warnings_Detected /= 1 then
1600 Set_Standard_Output;
1601 end Write_Error_Summary;
1607 procedure Write_Header (Sfile : Source_File_Index) is
1609 if Verbose_Mode or Full_List then
1610 if Original_Operating_Mode = Generate_Code then
1611 Write_Str ("Compiling: ");
1613 Write_Str ("Checking: ");
1616 Write_Name (Full_File_Name (Sfile));
1618 if not Debug_Flag_7 then
1619 Write_Str (" (source file time stamp: ");
1620 Write_Time_Stamp (Sfile);
1628 ----------------------
1629 -- Write_Max_Errors --
1630 ----------------------
1632 procedure Write_Max_Errors is
1634 if Maximum_Messages /= 0 then
1635 if Warnings_Detected >= Maximum_Messages then
1637 Write_Line ("maximum number of warnings output");
1638 Write_Line ("any further warnings suppressed");
1639 Set_Standard_Output;
1642 -- If too many errors print message
1644 if Total_Errors_Detected >= Maximum_Messages then
1646 Write_Line ("fatal error: maximum number of errors detected");
1647 Set_Standard_Output;
1650 end Write_Max_Errors;
1652 -- Start of processing for Output_Messages
1655 -- Error if Finalize has not been called
1657 if not Finalize_Called then
1658 raise Program_Error;
1661 -- Reset current error source file if the main unit has a pragma
1662 -- Source_Reference. This ensures outputting the proper name of
1663 -- the source file in this situation.
1665 if Main_Source_File = No_Source_File
1666 or else Num_SRef_Pragmas (Main_Source_File) /= 0
1668 Current_Error_Source_File := No_Source_File;
1673 if Brief_Output or (not Full_List and not Verbose_Mode) then
1676 E := First_Error_Msg;
1677 while E /= No_Error_Msg loop
1678 if not Errors.Table (E).Deleted and then not Debug_Flag_KK then
1679 if Full_Path_Name_For_Brief_Errors then
1680 Write_Name (Full_Ref_Name (Errors.Table (E).Sfile));
1682 Write_Name (Reference_Name (Errors.Table (E).Sfile));
1686 Write_Int (Int (Physical_To_Logical
1687 (Errors.Table (E).Line,
1688 Errors.Table (E).Sfile)));
1691 if Errors.Table (E).Col < 10 then
1695 Write_Int (Int (Errors.Table (E).Col));
1697 Output_Msg_Text (E);
1701 E := Errors.Table (E).Next;
1704 Set_Standard_Output;
1707 -- Full source listing case
1710 List_Pragmas_Index := 1;
1711 List_Pragmas_Mode := True;
1712 E := First_Error_Msg;
1714 -- Normal case, to stdout (copyright notice already output)
1716 if Full_List_File_Name = null then
1717 if not Debug_Flag_7 then
1724 Create_List_File_Access.all (Full_List_File_Name.all);
1725 Set_Special_Output (Write_List_Info_Access.all'Access);
1727 -- Write copyright notice to file
1729 if not Debug_Flag_7 then
1730 Write_Str ("GNAT ");
1731 Write_Str (Gnat_Version_String);
1733 Write_Str ("Copyright 1992-" &
1735 ", Free Software Foundation, Inc.");
1740 -- First list extended main source file units with errors
1742 for U in Main_Unit .. Last_Unit loop
1743 if In_Extended_Main_Source_Unit (Cunit_Entity (U))
1745 -- If debug flag d.m is set, only the main source is listed
1747 and then (U = Main_Unit or else not Debug_Flag_Dot_M)
1749 -- If the unit of the entity does not come from source, it is
1750 -- an implicit subprogram declaration for a child subprogram.
1751 -- Do not emit errors for it, they are listed with the body.
1754 (No (Cunit_Entity (U))
1755 or else Comes_From_Source (Cunit_Entity (U))
1756 or else not Is_Subprogram (Cunit_Entity (U)))
1759 Sfile : constant Source_File_Index := Source_Index (U);
1763 Write_Header (Sfile);
1766 -- Normally, we don't want an "error messages from file"
1767 -- message when listing the entire file, so we set the
1768 -- current source file as the current error source file.
1769 -- However, the old style of doing things was to list this
1770 -- message if pragma Source_Reference is present, even for
1771 -- the main unit. Since the purpose of the -gnatd.m switch
1772 -- is to duplicate the old behavior, we skip the reset if
1773 -- this debug flag is set.
1775 if not Debug_Flag_Dot_M then
1776 Current_Error_Source_File := Sfile;
1779 for N in 1 .. Last_Source_Line (Sfile) loop
1780 while E /= No_Error_Msg
1781 and then Errors.Table (E).Deleted
1783 E := Errors.Table (E).Next;
1788 and then Errors.Table (E).Line = N
1789 and then Errors.Table (E).Sfile = Sfile;
1791 Output_Source_Line (N, Sfile, Err_Flag);
1794 Output_Error_Msgs (E);
1796 if not Debug_Flag_2 then
1805 -- Then output errors, if any, for subsidiary units not in the
1806 -- main extended unit.
1808 -- Note: if debug flag d.m set, include errors for any units other
1809 -- than the main unit in the extended source unit (e.g. spec and
1810 -- subunits for a body).
1812 while E /= No_Error_Msg
1813 and then (not In_Extended_Main_Source_Unit (Errors.Table (E).Sptr)
1816 and then Get_Source_Unit
1817 (Errors.Table (E).Sptr) /= Main_Unit))
1819 if Errors.Table (E).Deleted then
1820 E := Errors.Table (E).Next;
1825 (Errors.Table (E).Line, Errors.Table (E).Sfile, True);
1826 Output_Error_Msgs (E);
1830 -- If output to file, write extra copy of error summary to the
1831 -- output file, and then close it.
1833 if Full_List_File_Name /= null then
1834 Write_Error_Summary;
1836 Close_List_File_Access.all;
1837 Cancel_Special_Output;
1841 -- Verbose mode (error lines only with error flags). Normally this is
1842 -- ignored in full list mode, unless we are listing to a file, in which
1843 -- case we still generate -gnatv output to standard output.
1846 and then (not Full_List or else Full_List_File_Name /= null)
1849 Write_Header (Main_Source_File);
1850 E := First_Error_Msg;
1852 -- Loop through error lines
1854 while E /= No_Error_Msg loop
1855 if Errors.Table (E).Deleted then
1856 E := Errors.Table (E).Next;
1860 (Errors.Table (E).Line, Errors.Table (E).Sfile, True);
1861 Output_Error_Msgs (E);
1866 -- Output error summary if verbose or full list mode
1868 if Verbose_Mode or else Full_List then
1869 Write_Error_Summary;
1874 if Warning_Mode = Treat_As_Error then
1875 Total_Errors_Detected := Total_Errors_Detected + Warnings_Detected;
1876 Warnings_Detected := 0;
1878 end Output_Messages;
1880 ------------------------
1881 -- Output_Source_Line --
1882 ------------------------
1884 procedure Output_Source_Line
1885 (L : Physical_Line_Number;
1886 Sfile : Source_File_Index;
1892 Line_Number_Output : Boolean := False;
1893 -- Set True once line number is output
1895 Empty_Line : Boolean := True;
1896 -- Set False if line includes at least one character
1899 if Sfile /= Current_Error_Source_File then
1900 Write_Str ("==============Error messages for ");
1902 case Sinput.File_Type (Sfile) is
1904 Write_Str ("source");
1906 when Sinput.Config =>
1907 Write_Str ("configuration pragmas");
1910 Write_Str ("symbol definition");
1912 when Sinput.Preproc =>
1913 Write_Str ("preprocessing data");
1916 Write_Str (" file: ");
1917 Write_Name (Full_File_Name (Sfile));
1920 if Num_SRef_Pragmas (Sfile) > 0 then
1921 Write_Str ("--------------Line numbers from file: ");
1922 Write_Name (Full_Ref_Name (Sfile));
1923 Write_Str (" (starting at line ");
1924 Write_Int (Int (First_Mapped_Line (Sfile)));
1929 Current_Error_Source_File := Sfile;
1932 if Errs or List_Pragmas_Mode then
1933 Output_Line_Number (Physical_To_Logical (L, Sfile));
1934 Line_Number_Output := True;
1937 S := Line_Start (L, Sfile);
1940 C := Source_Text (Sfile) (S);
1941 exit when C = ASCII.LF or else C = ASCII.CR or else C = EOF;
1943 -- Deal with matching entry in List_Pragmas table
1946 and then List_Pragmas_Index <= List_Pragmas.Last
1947 and then S = List_Pragmas.Table (List_Pragmas_Index).Ploc
1949 case List_Pragmas.Table (List_Pragmas_Index).Ptyp is
1953 -- Ignore if on line with errors so that error flags
1954 -- get properly listed with the error line .
1957 Write_Char (ASCII.FF);
1961 List_Pragmas_Mode := True;
1963 if not Line_Number_Output then
1964 Output_Line_Number (Physical_To_Logical (L, Sfile));
1965 Line_Number_Output := True;
1972 List_Pragmas_Mode := False;
1975 List_Pragmas_Index := List_Pragmas_Index + 1;
1977 -- Normal case (no matching entry in List_Pragmas table)
1980 if Errs or List_Pragmas_Mode then
1985 Empty_Line := False;
1989 -- If we have output a source line, then add the line terminator, with
1990 -- training spaces preserved (so we output the line exactly as input).
1992 if Line_Number_Output then
1996 Write_Eol_Keep_Blanks;
1999 end Output_Source_Line;
2001 -----------------------------
2002 -- Remove_Warning_Messages --
2003 -----------------------------
2005 procedure Remove_Warning_Messages (N : Node_Id) is
2007 function Check_For_Warning (N : Node_Id) return Traverse_Result;
2008 -- This function checks one node for a possible warning message
2010 function Check_All_Warnings is new Traverse_Func (Check_For_Warning);
2011 -- This defines the traversal operation
2013 -----------------------
2014 -- Check_For_Warning --
2015 -----------------------
2017 function Check_For_Warning (N : Node_Id) return Traverse_Result is
2018 Loc : constant Source_Ptr := Sloc (N);
2021 function To_Be_Removed (E : Error_Msg_Id) return Boolean;
2022 -- Returns True for a message that is to be removed. Also adjusts
2023 -- warning count appropriately.
2029 function To_Be_Removed (E : Error_Msg_Id) return Boolean is
2031 if E /= No_Error_Msg
2033 -- Don't remove if location does not match
2035 and then Errors.Table (E).Optr = Loc
2037 -- Don't remove if not warning/info message. Note that we do
2038 -- not remove style messages here. They are warning messages
2039 -- but not ones we want removed in this context.
2041 and then Errors.Table (E).Warn
2043 -- Don't remove unconditional messages
2045 and then not Errors.Table (E).Uncond
2047 Warnings_Detected := Warnings_Detected - 1;
2050 -- No removal required
2057 -- Start of processing for Check_For_Warnings
2060 while To_Be_Removed (First_Error_Msg) loop
2061 First_Error_Msg := Errors.Table (First_Error_Msg).Next;
2064 if First_Error_Msg = No_Error_Msg then
2065 Last_Error_Msg := No_Error_Msg;
2068 E := First_Error_Msg;
2069 while E /= No_Error_Msg loop
2070 while To_Be_Removed (Errors.Table (E).Next) loop
2071 Errors.Table (E).Next :=
2072 Errors.Table (Errors.Table (E).Next).Next;
2074 if Errors.Table (E).Next = No_Error_Msg then
2075 Last_Error_Msg := E;
2079 E := Errors.Table (E).Next;
2082 if Nkind (N) = N_Raise_Constraint_Error
2083 and then Original_Node (N) /= N
2084 and then No (Condition (N))
2086 -- Warnings may have been posted on subexpressions of the original
2087 -- tree. We place the original node back on the tree to remove
2088 -- those warnings, whose sloc do not match those of any node in
2089 -- the current tree. Given that we are in unreachable code, this
2090 -- modification to the tree is harmless.
2093 Status : Traverse_Final_Result;
2096 if Is_List_Member (N) then
2097 Set_Condition (N, Original_Node (N));
2098 Status := Check_All_Warnings (Condition (N));
2100 Rewrite (N, Original_Node (N));
2101 Status := Check_All_Warnings (N);
2110 end Check_For_Warning;
2112 -- Start of processing for Remove_Warning_Messages
2115 if Warnings_Detected /= 0 then
2117 Discard : Traverse_Final_Result;
2118 pragma Warnings (Off, Discard);
2121 Discard := Check_All_Warnings (N);
2124 end Remove_Warning_Messages;
2126 procedure Remove_Warning_Messages (L : List_Id) is
2129 if Is_Non_Empty_List (L) then
2131 while Present (Stat) loop
2132 Remove_Warning_Messages (Stat);
2136 end Remove_Warning_Messages;
2138 ---------------------------
2139 -- Set_Identifier_Casing --
2140 ---------------------------
2142 procedure Set_Identifier_Casing
2143 (Identifier_Name : System.Address;
2144 File_Name : System.Address)
2146 Ident : constant Big_String_Ptr := To_Big_String_Ptr (Identifier_Name);
2147 File : constant Big_String_Ptr := To_Big_String_Ptr (File_Name);
2150 Desired_Case : Casing_Type := Mixed_Case;
2151 -- Casing required for result. Default value of Mixed_Case is used if
2152 -- for some reason we cannot find the right file name in the table.
2155 -- Get length of file name
2158 while File (Flen + 1) /= ASCII.NUL loop
2162 -- Loop through file names to find matching one. This is a bit slow, but
2163 -- we only do it in error situations so it is not so terrible. Note that
2164 -- if the loop does not exit, then the desired case will be left set to
2165 -- Mixed_Case, this can happen if the name was not in canonical form,
2166 -- and gets canonicalized on VMS. Possibly we could fix this by
2167 -- unconditionally canonicalizing these names ???
2169 for J in 1 .. Last_Source_File loop
2170 Get_Name_String (Full_Debug_Name (J));
2173 and then Name_Buffer (1 .. Name_Len) = String (File (1 .. Flen))
2175 Desired_Case := Identifier_Casing (J);
2180 -- Copy identifier as given to Name_Buffer
2182 for J in Name_Buffer'Range loop
2183 Name_Buffer (J) := Ident (J);
2185 if Name_Buffer (J) = ASCII.NUL then
2191 Set_Casing (Desired_Case);
2192 end Set_Identifier_Casing;
2194 -----------------------
2195 -- Set_Ignore_Errors --
2196 -----------------------
2198 procedure Set_Ignore_Errors (To : Boolean) is
2200 Errors_Must_Be_Ignored := To;
2201 end Set_Ignore_Errors;
2203 ------------------------------
2204 -- Set_Msg_Insertion_Column --
2205 ------------------------------
2207 procedure Set_Msg_Insertion_Column is
2209 if RM_Column_Check then
2210 Set_Msg_Str (" in column ");
2211 Set_Msg_Int (Int (Error_Msg_Col) + 1);
2213 end Set_Msg_Insertion_Column;
2215 ----------------------------
2216 -- Set_Msg_Insertion_Node --
2217 ----------------------------
2219 procedure Set_Msg_Insertion_Node is
2224 Error_Msg_Node_1 = Error
2225 or else Error_Msg_Node_1 = Any_Type;
2227 if Error_Msg_Node_1 = Empty then
2228 Set_Msg_Blank_Conditional;
2229 Set_Msg_Str ("<empty>");
2231 elsif Error_Msg_Node_1 = Error then
2233 Set_Msg_Str ("<error>");
2235 elsif Error_Msg_Node_1 = Standard_Void_Type then
2237 Set_Msg_Str ("procedure name");
2240 Set_Msg_Blank_Conditional;
2244 K := Nkind (Error_Msg_Node_1);
2246 -- If we have operator case, skip quotes since name of operator
2247 -- itself will supply the required quotations. An operator can be an
2248 -- applied use in an expression or an explicit operator symbol, or an
2249 -- identifier whose name indicates it is an operator.
2252 or else K = N_Operator_Symbol
2253 or else K = N_Defining_Operator_Symbol
2254 or else ((K = N_Identifier or else K = N_Defining_Identifier)
2255 and then Is_Operator_Name (Chars (Error_Msg_Node_1)))
2257 Set_Msg_Node (Error_Msg_Node_1);
2259 -- Normal case, not an operator, surround with quotes
2263 Set_Qualification (Error_Msg_Qual_Level, Error_Msg_Node_1);
2264 Set_Msg_Node (Error_Msg_Node_1);
2269 -- The following assignment ensures that a second ampersand insertion
2270 -- character will correspond to the Error_Msg_Node_2 parameter. We
2271 -- suppress possible validity checks in case operating in -gnatVa mode,
2272 -- and Error_Msg_Node_2 is not needed and has not been set.
2275 pragma Suppress (Range_Check);
2277 Error_Msg_Node_1 := Error_Msg_Node_2;
2279 end Set_Msg_Insertion_Node;
2281 --------------------------------------
2282 -- Set_Msg_Insertion_Type_Reference --
2283 --------------------------------------
2285 procedure Set_Msg_Insertion_Type_Reference (Flag : Source_Ptr) is
2291 if Error_Msg_Node_1 = Standard_Void_Type then
2292 Set_Msg_Str ("package or procedure name");
2295 elsif Error_Msg_Node_1 = Standard_Exception_Type then
2296 Set_Msg_Str ("exception name");
2299 elsif Error_Msg_Node_1 = Any_Access
2300 or else Error_Msg_Node_1 = Any_Array
2301 or else Error_Msg_Node_1 = Any_Boolean
2302 or else Error_Msg_Node_1 = Any_Character
2303 or else Error_Msg_Node_1 = Any_Composite
2304 or else Error_Msg_Node_1 = Any_Discrete
2305 or else Error_Msg_Node_1 = Any_Fixed
2306 or else Error_Msg_Node_1 = Any_Integer
2307 or else Error_Msg_Node_1 = Any_Modular
2308 or else Error_Msg_Node_1 = Any_Numeric
2309 or else Error_Msg_Node_1 = Any_Real
2310 or else Error_Msg_Node_1 = Any_Scalar
2311 or else Error_Msg_Node_1 = Any_String
2313 Get_Unqualified_Decoded_Name_String (Chars (Error_Msg_Node_1));
2314 Set_Msg_Name_Buffer;
2317 elsif Error_Msg_Node_1 = Universal_Real then
2318 Set_Msg_Str ("type universal real");
2321 elsif Error_Msg_Node_1 = Universal_Integer then
2322 Set_Msg_Str ("type universal integer");
2325 elsif Error_Msg_Node_1 = Universal_Fixed then
2326 Set_Msg_Str ("type universal fixed");
2330 -- Special case of anonymous array
2332 if Nkind (Error_Msg_Node_1) in N_Entity
2333 and then Is_Array_Type (Error_Msg_Node_1)
2334 and then Present (Related_Array_Object (Error_Msg_Node_1))
2336 Set_Msg_Str ("type of ");
2337 Set_Msg_Node (Related_Array_Object (Error_Msg_Node_1));
2338 Set_Msg_Str (" declared");
2339 Set_Msg_Insertion_Line_Number
2340 (Sloc (Related_Array_Object (Error_Msg_Node_1)), Flag);
2344 -- If we fall through, it is not a special case, so first output
2345 -- the name of the type, preceded by private for a private type
2347 if Is_Private_Type (Error_Msg_Node_1) then
2348 Set_Msg_Str ("private type ");
2350 Set_Msg_Str ("type ");
2353 Ent := Error_Msg_Node_1;
2355 if Is_Internal_Name (Chars (Ent)) then
2356 Unwind_Internal_Type (Ent);
2359 -- Types in Standard are displayed as "Standard.name"
2361 if Sloc (Ent) <= Standard_Location then
2363 Set_Msg_Str ("Standard.");
2368 -- Types in other language defined units are displayed as
2369 -- "package-name.type-name"
2372 Is_Predefined_File_Name (Unit_File_Name (Get_Source_Unit (Ent)))
2374 Get_Unqualified_Decoded_Name_String
2375 (Unit_Name (Get_Source_Unit (Ent)));
2376 Name_Len := Name_Len - 2;
2378 Set_Casing (Mixed_Case);
2379 Set_Msg_Name_Buffer;
2381 Set_Casing (Mixed_Case);
2386 -- All other types display as "type name" defined at line xxx
2387 -- possibly qualified if qualification is requested.
2391 Set_Qualification (Error_Msg_Qual_Level, Ent);
2395 -- If Ent is an anonymous subprogram type, there is no name to print,
2396 -- so remove enclosing quotes.
2398 if Buffer_Ends_With ("""") then
2399 Buffer_Remove ("""");
2405 -- If the original type did not come from a predefined file, add the
2406 -- location where the type was defined.
2408 if Sloc (Error_Msg_Node_1) > Standard_Location
2410 not Is_Predefined_File_Name
2411 (Unit_File_Name (Get_Source_Unit (Error_Msg_Node_1)))
2413 Set_Msg_Str (" defined");
2414 Set_Msg_Insertion_Line_Number (Sloc (Error_Msg_Node_1), Flag);
2416 -- If it did come from a predefined file, deal with the case where
2417 -- this was a file with a generic instantiation from elsewhere.
2420 if Sloc (Error_Msg_Node_1) > Standard_Location then
2422 Iloc : constant Source_Ptr :=
2423 Instantiation_Location (Sloc (Error_Msg_Node_1));
2426 if Iloc /= No_Location
2427 and then not Suppress_Instance_Location
2429 Set_Msg_Str (" from instance");
2430 Set_Msg_Insertion_Line_Number (Iloc, Flag);
2435 end Set_Msg_Insertion_Type_Reference;
2437 ---------------------------------
2438 -- Set_Msg_Insertion_Unit_Name --
2439 ---------------------------------
2441 procedure Set_Msg_Insertion_Unit_Name (Suffix : Boolean := True) is
2443 if Error_Msg_Unit_1 = No_Unit_Name then
2446 elsif Error_Msg_Unit_1 = Error_Unit_Name then
2448 Set_Msg_Str ("<error>");
2451 Get_Unit_Name_String (Error_Msg_Unit_1, Suffix);
2454 Set_Msg_Name_Buffer;
2458 -- The following assignment ensures that a second percent insertion
2459 -- character will correspond to the Error_Msg_Unit_2 parameter. We
2460 -- suppress possible validity checks in case operating in -gnatVa mode,
2461 -- and Error_Msg_Unit_2 is not needed and has not been set.
2464 pragma Suppress (Range_Check);
2466 Error_Msg_Unit_1 := Error_Msg_Unit_2;
2468 end Set_Msg_Insertion_Unit_Name;
2474 procedure Set_Msg_Node (Node : Node_Id) is
2479 if Nkind (Node) = N_Designator then
2480 Set_Msg_Node (Name (Node));
2482 Set_Msg_Node (Identifier (Node));
2485 elsif Nkind (Node) = N_Defining_Program_Unit_Name then
2486 Set_Msg_Node (Name (Node));
2488 Set_Msg_Node (Defining_Identifier (Node));
2491 elsif Nkind (Node) = N_Selected_Component then
2492 Set_Msg_Node (Prefix (Node));
2494 Set_Msg_Node (Selector_Name (Node));
2498 -- The only remaining possibilities are identifiers, defining
2499 -- identifiers, pragmas, and pragma argument associations.
2501 if Nkind (Node) = N_Pragma then
2502 Nam := Pragma_Name (Node);
2504 -- The other cases have Chars fields, and we want to test for possible
2505 -- internal names, which generally represent something gone wrong. An
2506 -- exception is the case of internal type names, where we try to find a
2507 -- reasonable external representation for the external name
2509 elsif Is_Internal_Name (Chars (Node))
2511 ((Is_Entity_Name (Node)
2512 and then Present (Entity (Node))
2513 and then Is_Type (Entity (Node)))
2515 (Nkind (Node) = N_Defining_Identifier and then Is_Type (Node)))
2517 if Nkind (Node) = N_Identifier then
2518 Ent := Entity (Node);
2523 -- If the type is the designated type of an access_to_subprogram,
2524 -- there is no name to provide in the call.
2526 if Ekind (Ent) = E_Subprogram_Type then
2529 Unwind_Internal_Type (Ent);
2533 -- If not internal name, just use name in Chars field
2536 Nam := Chars (Node);
2539 -- At this stage, the name to output is in Nam
2541 Get_Unqualified_Decoded_Name_String (Nam);
2543 -- Remove trailing upper case letters from the name (useful for
2544 -- dealing with some cases of internal names.
2546 while Name_Len > 1 and then Name_Buffer (Name_Len) in 'A' .. 'Z' loop
2547 Name_Len := Name_Len - 1;
2550 -- If we have any of the names from standard that start with the
2551 -- characters "any " (e.g. Any_Type), then kill the message since
2552 -- almost certainly it is a junk cascaded message.
2555 and then Name_Buffer (1 .. 4) = "any "
2557 Kill_Message := True;
2560 -- Now we have to set the proper case. If we have a source location
2561 -- then do a check to see if the name in the source is the same name
2562 -- as the name in the Names table, except for possible differences
2563 -- in case, which is the case when we can copy from the source.
2566 Src_Loc : constant Source_Ptr := Sloc (Node);
2567 Sbuffer : Source_Buffer_Ptr;
2569 Src_Ptr : Source_Ptr;
2575 -- For standard locations, always use mixed case
2577 if Src_Loc <= No_Location
2578 or else Sloc (Node) <= No_Location
2580 Set_Casing (Mixed_Case);
2583 -- Determine if the reference we are dealing with corresponds to
2584 -- text at the point of the error reference. This will often be
2585 -- the case for simple identifier references, and is the case
2586 -- where we can copy the spelling from the source.
2588 Sbuffer := Source_Text (Get_Source_File_Index (Src_Loc));
2590 while Ref_Ptr <= Name_Len loop
2592 Fold_Lower (Sbuffer (Src_Ptr)) /=
2593 Fold_Lower (Name_Buffer (Ref_Ptr));
2594 Ref_Ptr := Ref_Ptr + 1;
2595 Src_Ptr := Src_Ptr + 1;
2598 -- If we get through the loop without a mismatch, then output the
2599 -- name the way it is spelled in the source program
2601 if Ref_Ptr > Name_Len then
2604 for J in 1 .. Name_Len loop
2605 Name_Buffer (J) := Sbuffer (Src_Ptr);
2606 Src_Ptr := Src_Ptr + 1;
2609 -- Otherwise set the casing using the default identifier casing
2612 Set_Casing (Identifier_Casing (Flag_Source), Mixed_Case);
2617 Set_Msg_Name_Buffer;
2625 procedure Set_Msg_Text (Text : String; Flag : Source_Ptr) is
2626 C : Character; -- Current character
2627 P : Natural; -- Current index;
2630 Manual_Quote_Mode := False;
2631 Is_Unconditional_Msg := False;
2633 Flag_Source := Get_Source_File_Index (Flag);
2636 while P <= Text'Last loop
2640 -- Check for insertion character or sequence
2644 if P <= Text'Last and then Text (P) = '%' then
2646 Set_Msg_Insertion_Name_Literal;
2648 Set_Msg_Insertion_Name;
2652 if P <= Text'Last and then Text (P) = '$' then
2654 Set_Msg_Insertion_Unit_Name (Suffix => False);
2656 Set_Msg_Insertion_Unit_Name;
2660 Set_Msg_Insertion_File_Name;
2663 Set_Msg_Insertion_Type_Reference (Flag);
2666 Set_Msg_Insertion_Reserved_Name;
2669 Set_Msg_Insertion_Node;
2672 Set_Msg_Insertion_Line_Number (Error_Msg_Sloc, Flag);
2675 Continuation := True;
2677 if Text (P) = '\' then
2678 Continuation_New_Line := True;
2683 Set_Msg_Insertion_Column;
2686 Set_Msg_Insertion_Run_Time_Name;
2689 Set_Msg_Insertion_Uint;
2692 Manual_Quote_Mode := not Manual_Quote_Mode;
2696 Is_Unconditional_Msg := True;
2699 null; -- already dealt with
2702 null; -- already dealt with
2705 null; -- already dealt with
2708 Set_Msg_Char (Text (P));
2712 Set_Msg_Str (Error_Msg_String (1 .. Error_Msg_Strlen));
2714 -- Upper case letter
2718 -- Start of reserved word if two or more
2720 if P <= Text'Last and then Text (P) in 'A' .. 'Z' then
2722 Set_Msg_Insertion_Reserved_Word (Text, P);
2724 -- Single upper case letter is just inserted
2730 -- Normal character with no special treatment
2744 procedure Set_Posted (N : Node_Id) is
2748 if Is_Serious_Error then
2750 -- We always set Error_Posted on the node itself
2752 Set_Error_Posted (N);
2754 -- If it is a subexpression, then set Error_Posted on parents up to
2755 -- and including the first non-subexpression construct. This helps
2756 -- avoid cascaded error messages within a single expression.
2762 Set_Error_Posted (P);
2763 exit when Nkind (P) not in N_Subexpr;
2766 -- A special check, if we just posted an error on an attribute
2767 -- definition clause, then also set the entity involved as posted.
2768 -- For example, this stops complaining about the alignment after
2769 -- complaining about the size, which is likely to be useless.
2771 if Nkind (P) = N_Attribute_Definition_Clause then
2772 if Is_Entity_Name (Name (P)) then
2773 Set_Error_Posted (Entity (Name (P)));
2779 -----------------------
2780 -- Set_Qualification --
2781 -----------------------
2783 procedure Set_Qualification (N : Nat; E : Entity_Id) is
2785 if N /= 0 and then Scope (E) /= Standard_Standard then
2786 Set_Qualification (N - 1, Scope (E));
2787 Set_Msg_Node (Scope (E));
2790 end Set_Qualification;
2792 ------------------------
2793 -- Special_Msg_Delete --
2794 ------------------------
2796 -- Is it really right to have all this specialized knowledge in errout?
2798 function Special_Msg_Delete
2800 N : Node_Or_Entity_Id;
2801 E : Node_Or_Entity_Id) return Boolean
2804 -- Never delete messages in -gnatdO mode
2806 if Debug_Flag_OO then
2809 -- Processing for "atomic access cannot be guaranteed"
2811 elsif Msg = "atomic access to & cannot be guaranteed" then
2813 -- When an atomic object refers to a non-atomic type in the same
2814 -- scope, we implicitly make the type atomic. In the non-error case
2815 -- this is surely safe (and in fact prevents an error from occurring
2816 -- if the type is not atomic by default). But if the object cannot be
2817 -- made atomic, then we introduce an extra junk message by this
2818 -- manipulation, which we get rid of here.
2820 -- We identify this case by the fact that it references a type for
2821 -- which Is_Atomic is set, but there is no Atomic pragma setting it.
2824 and then Is_Atomic (E)
2825 and then No (Get_Rep_Pragma (E, Name_Atomic))
2830 -- Processing for "Size too small" messages
2832 elsif Msg = "size for& too small, minimum allowed is ^" then
2834 -- Suppress "size too small" errors in CodePeer mode, since pragma
2835 -- Pack is also ignored in this configuration.
2837 if CodePeer_Mode then
2840 -- When a size is wrong for a frozen type there is no explicit size
2841 -- clause, and other errors have occurred, suppress the message,
2842 -- since it is likely that this size error is a cascaded result of
2843 -- other errors. The reason we eliminate unfrozen types is that
2844 -- messages issued before the freeze type are for sure OK.
2847 and then Serious_Errors_Detected > 0
2848 and then Nkind (N) /= N_Component_Clause
2849 and then Nkind (Parent (N)) /= N_Component_Clause
2851 No (Get_Attribute_Definition_Clause (E, Attribute_Size))
2853 No (Get_Attribute_Definition_Clause (E, Attribute_Object_Size))
2855 No (Get_Attribute_Definition_Clause (E, Attribute_Value_Size))
2861 -- All special tests complete, so go ahead with message
2864 end Special_Msg_Delete;
2866 --------------------------
2867 -- Unwind_Internal_Type --
2868 --------------------------
2870 procedure Unwind_Internal_Type (Ent : in out Entity_Id) is
2871 Derived : Boolean := False;
2873 Old_Ent : Entity_Id;
2876 -- Undo placement of a quote, since we will put it back later
2878 Mchar := Msg_Buffer (Msglen);
2881 Msglen := Msglen - 1;
2884 -- The loop here deals with recursive types, we are trying to find a
2885 -- related entity that is not an implicit type. Note that the check with
2886 -- Old_Ent stops us from getting "stuck". Also, we don't output the
2887 -- "type derived from" message more than once in the case where we climb
2888 -- up multiple levels.
2893 -- Implicit access type, use directly designated type In Ada 2005,
2894 -- the designated type may be an anonymous access to subprogram, in
2895 -- which case we can only point to its definition.
2897 if Is_Access_Type (Ent) then
2898 if Ekind (Ent) = E_Access_Subprogram_Type
2899 or else Ekind (Ent) = E_Anonymous_Access_Subprogram_Type
2900 or else Is_Access_Protected_Subprogram_Type (Ent)
2902 Ent := Directly_Designated_Type (Ent);
2904 if not Comes_From_Source (Ent) then
2905 if Buffer_Ends_With ("type ") then
2906 Buffer_Remove ("type ");
2909 if Is_Itype (Ent) then
2911 Assoc : constant Node_Id :=
2912 Associated_Node_For_Itype (Ent);
2915 if Nkind (Assoc) in N_Subprogram_Specification then
2917 -- Anonymous access to subprogram in a signature.
2918 -- Indicate the enclosing subprogram.
2922 (Associated_Node_For_Itype (Ent));
2924 ("access to subprogram declared in profile of ");
2927 Set_Msg_Str ("access to subprogram with profile ");
2932 elsif Ekind (Ent) = E_Function then
2933 Set_Msg_Str ("access to function ");
2935 Set_Msg_Str ("access to procedure ");
2940 -- Type is access to object, named or anonymous
2943 Set_Msg_Str ("access to ");
2944 Ent := Directly_Designated_Type (Ent);
2949 elsif Is_Class_Wide_Type (Ent) then
2951 Ent := Root_Type (Ent);
2953 -- Use base type if this is a subtype
2955 elsif Ent /= Base_Type (Ent) then
2956 Buffer_Remove ("type ");
2958 -- Avoid duplication "subtype of subtype of", and also replace
2959 -- "derived from subtype of" simply by "derived from"
2961 if not Buffer_Ends_With ("subtype of ")
2962 and then not Buffer_Ends_With ("derived from ")
2964 Set_Msg_Str ("subtype of ");
2967 Ent := Base_Type (Ent);
2969 -- If this is a base type with a first named subtype, use the first
2970 -- named subtype instead. This is not quite accurate in all cases,
2971 -- but it makes too much noise to be accurate and add 'Base in all
2972 -- cases. Note that we only do this is the first named subtype is not
2973 -- itself an internal name. This avoids the obvious loop (subtype ->
2974 -- basetype -> subtype) which would otherwise occur!)
2978 FST : constant Entity_Id := First_Subtype (Ent);
2981 if not Is_Internal_Name (Chars (FST)) then
2985 -- Otherwise use root type
2989 Buffer_Remove ("type ");
2991 -- Test for "subtype of type derived from" which seems
2992 -- excessive and is replaced by "type derived from".
2994 Buffer_Remove ("subtype of");
2996 -- Avoid duplicated "type derived from type derived from"
2998 if not Buffer_Ends_With ("type derived from ") then
2999 Set_Msg_Str ("type derived from ");
3010 -- If we are stuck in a loop, get out and settle for the internal
3011 -- name after all. In this case we set to kill the message if it is
3012 -- not the first error message (we really try hard not to show the
3013 -- dirty laundry of the implementation to the poor user!)
3015 if Ent = Old_Ent then
3016 Kill_Message := True;
3020 -- Get out if we finally found a non-internal name to use
3022 exit Find when not Is_Internal_Name (Chars (Ent));
3028 end Unwind_Internal_Type;
3034 procedure VMS_Convert is
3044 P := Msg_Buffer'First;
3050 if Msg_Buffer (P) = '-' then
3051 for G in Gnames'Range loop
3052 L := Gnames (G)'Length;
3054 -- See if we have "-ggg switch", where ggg is Gnames entry
3056 if P + L + 7 <= Msglen
3057 and then Msg_Buffer (P + 1 .. P + L) = Gnames (G).all
3058 and then Msg_Buffer (P + L + 1 .. P + L + 7) = " switch"
3060 -- Replace by "/vvv qualifier", where vvv is Vnames entry
3062 N := Vnames (G)'Length;
3063 Msg_Buffer (P + N + 11 .. Msglen + N - L + 3) :=
3064 Msg_Buffer (P + L + 8 .. Msglen);
3065 Msg_Buffer (P) := '/';
3066 Msg_Buffer (P + 1 .. P + N) := Vnames (G).all;
3067 Msg_Buffer (P + N + 1 .. P + N + 10) := " qualifier";
3069 Msglen := Msglen + N - L + 3;