1 ------------------------------------------------------------------------------
3 -- GNAT COMPILER COMPONENTS --
9 -- Copyright (C) 1992-2014, 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 given
147 -- node to the current message. For N_Designator, N_Selected_Component,
148 -- N_Defining_Program_Unit_Name, and N_Expanded_Name, the Prefix is
151 procedure Set_Msg_Text (Text : String; Flag : Source_Ptr);
152 -- Add a sequence of characters to the current message. The characters may
153 -- be one of the special insertion characters (see documentation in spec).
154 -- Flag is the location at which the error is to be posted, which is used
155 -- to determine whether or not the # insertion needs a file name. The
156 -- variables Msg_Buffer are set on return Msglen.
158 procedure Set_Posted (N : Node_Id);
159 -- Sets the Error_Posted flag on the given node, and all its parents
160 -- that are subexpressions and then on the parent non-subexpression
161 -- construct that contains the original expression (this reduces the
162 -- number of cascaded messages). Note that this call only has an effect
163 -- for a serious error. For a non-serious error, it has no effect.
165 procedure Set_Qualification (N : Nat; E : Entity_Id);
166 -- Outputs up to N levels of qualification for the given entity. For
167 -- example, the entity A.B.C.D will output B.C. if N = 2.
169 function Special_Msg_Delete
171 N : Node_Or_Entity_Id;
172 E : Node_Or_Entity_Id) return Boolean;
173 -- This function is called from Error_Msg_NEL, passing the message Msg,
174 -- node N on which the error is to be posted, and the entity or node E
175 -- to be used for an & insertion in the message if any. The job of this
176 -- procedure is to test for certain cascaded messages that we would like
177 -- to suppress. If the message is to be suppressed then we return True.
178 -- If the message should be generated (the normal case) False is returned.
180 procedure Unwind_Internal_Type (Ent : in out Entity_Id);
181 -- This procedure is given an entity id for an internal type, i.e. a type
182 -- with an internal name. It unwinds the type to try to get to something
183 -- reasonably printable, generating prefixes like "subtype of", "access
184 -- to", etc along the way in the buffer. The value in Ent on return is the
185 -- final name to be printed. Hopefully this is not an internal name, but in
186 -- some internal name cases, it is an internal name, and has to be printed
187 -- anyway (although in this case the message has been killed if possible).
188 -- The global variable Class_Flag is set to True if the resulting entity
189 -- should have 'Class appended to its name (see Add_Class procedure), and
190 -- is otherwise unchanged.
192 procedure VMS_Convert;
193 -- This procedure has no effect if called when the host is not OpenVMS. If
194 -- the host is indeed OpenVMS, then the error message stored in Msg_Buffer
195 -- is scanned for appearances of switch names which need converting to
196 -- corresponding VMS qualifier names. See Gnames/Vnames table in Errout
197 -- spec for precise definition of the conversion that is performed by this
198 -- routine in OpenVMS mode.
200 -----------------------
201 -- Change_Error_Text --
202 -----------------------
204 procedure Change_Error_Text (Error_Id : Error_Msg_Id; New_Msg : String) is
205 Save_Next : Error_Msg_Id;
206 Err_Id : Error_Msg_Id := Error_Id;
209 Set_Msg_Text (New_Msg, Errors.Table (Error_Id).Sptr);
210 Errors.Table (Error_Id).Text := new String'(Msg_Buffer (1 .. Msglen));
212 -- If in immediate error message mode, output modified error message now
213 -- This is just a bit tricky, because we want to output just a single
214 -- message, and the messages we modified is already linked in. We solve
215 -- this by temporarily resetting its forward pointer to empty.
217 if Debug_Flag_OO then
218 Save_Next := Errors.Table (Error_Id).Next;
219 Errors.Table (Error_Id).Next := No_Error_Msg;
222 (Errors.Table (Error_Id).Line, Errors.Table (Error_Id).Sfile, True);
223 Output_Error_Msgs (Err_Id);
224 Errors.Table (Error_Id).Next := Save_Next;
226 end Change_Error_Text;
228 ------------------------
229 -- Compilation_Errors --
230 ------------------------
232 function Compilation_Errors return Boolean is
234 if not Finalize_Called then
237 return Erroutc.Compilation_Errors;
239 end Compilation_Errors;
245 -- Error_Msg posts a flag at the given location, except that if the
246 -- Flag_Location points within a generic template and corresponds to an
247 -- instantiation of this generic template, then the actual message will be
248 -- posted on the generic instantiation, along with additional messages
249 -- referencing the generic declaration.
251 procedure Error_Msg (Msg : String; Flag_Location : Source_Ptr) is
252 Sindex : Source_File_Index;
253 -- Source index for flag location
255 Orig_Loc : Source_Ptr;
256 -- Original location of Flag_Location (i.e. location in original
257 -- template in instantiation case, otherwise unchanged).
260 -- It is a fatal error to issue an error message when scanning from the
261 -- internal source buffer (see Sinput for further documentation)
263 pragma Assert (Sinput.Source /= Internal_Source_Ptr);
265 -- Return if all errors are to be ignored
267 if Errors_Must_Be_Ignored then
271 -- If we already have messages, and we are trying to place a message at
272 -- No_Location or in package Standard, then just ignore the attempt
273 -- since we assume that what is happening is some cascaded junk. Note
274 -- that this is safe in the sense that proceeding will surely bomb.
276 if Flag_Location < First_Source_Ptr
277 and then Total_Errors_Detected > 0
282 -- Start of processing for new message
284 Sindex := Get_Source_File_Index (Flag_Location);
285 Test_Style_Warning_Serious_Unconditional_Msg (Msg);
286 Orig_Loc := Original_Location (Flag_Location);
288 -- If the current location is in an instantiation, the issue arises of
289 -- whether to post the message on the template or the instantiation.
291 -- The way we decide is to see if we have posted the same message on
292 -- the template when we compiled the template (the template is always
293 -- compiled before any instantiations). For this purpose, we use a
294 -- separate table of messages. The reason we do this is twofold:
296 -- First, the messages can get changed by various processing
297 -- including the insertion of tokens etc, making it hard to
298 -- do the comparison.
300 -- Second, we will suppress a warning on a template if it is not in
301 -- the current extended source unit. That's reasonable and means we
302 -- don't want the warning on the instantiation here either, but it
303 -- does mean that the main error table would not in any case include
306 if Flag_Location = Orig_Loc then
307 Non_Instance_Msgs.Append ((new String'(Msg), Flag_Location));
308 Warn_On_Instance := False;
310 -- Here we have an instance message
313 -- Delete if debug flag off, and this message duplicates a message
314 -- already posted on the corresponding template
316 if not Debug_Flag_GG then
317 for J in Non_Instance_Msgs.First .. Non_Instance_Msgs.Last loop
318 if Msg = Non_Instance_Msgs.Table (J).Msg.all
319 and then Non_Instance_Msgs.Table (J).Loc = Orig_Loc
326 -- No duplicate, so error/warning will be posted on instance
328 Warn_On_Instance := Is_Warning_Msg;
331 -- Ignore warning message that is suppressed for this location. Note
332 -- that style checks are not considered warning messages for this
336 and then Warnings_Suppressed (Orig_Loc) /= No_String
340 -- For style messages, check too many messages so far
343 and then Maximum_Messages /= 0
344 and then Warnings_Detected >= Maximum_Messages
349 -- The idea at this stage is that we have two kinds of messages
351 -- First, we have those messages that are to be placed as requested at
352 -- Flag_Location. This includes messages that have nothing to do with
353 -- generics, and also messages placed on generic templates that reflect
354 -- an error in the template itself. For such messages we simply call
355 -- Error_Msg_Internal to place the message in the requested location.
357 if Instantiation (Sindex) = No_Location then
358 Error_Msg_Internal (Msg, Flag_Location, Flag_Location, False);
362 -- If we are trying to flag an error in an instantiation, we may have
363 -- a generic contract violation. What we generate in this case is:
365 -- instantiation error at ...
366 -- original error message
370 -- warning: in instantiation at
371 -- warning: original warning message
373 -- All these messages are posted at the location of the top level
374 -- instantiation. If there are nested instantiations, then the
375 -- instantiation error message can be repeated, pointing to each
376 -- of the relevant instantiations.
378 -- Note: the instantiation mechanism is also shared for inlining of
379 -- subprogram bodies when front end inlining is done. In this case the
380 -- messages have the form:
382 -- in inlined body at ...
383 -- original error message
387 -- warning: in inlined body at
388 -- warning: original warning message
390 -- OK, here we have an instantiation error, and we need to generate the
391 -- error on the instantiation, rather than on the template.
394 Actual_Error_Loc : Source_Ptr;
395 -- Location of outer level instantiation in instantiation case, or
396 -- just a copy of Flag_Location in the normal case. This is the
397 -- location where all error messages will actually be posted.
399 Save_Error_Msg_Sloc : constant Source_Ptr := Error_Msg_Sloc;
400 -- Save possible location set for caller's message. We need to use
401 -- Error_Msg_Sloc for the location of the instantiation error but we
402 -- have to preserve a possible original value.
404 X : Source_File_Index;
406 Msg_Cont_Status : Boolean;
407 -- Used to label continuation lines in instantiation case with
408 -- proper Msg_Cont status.
411 -- Loop to find highest level instantiation, where all error
412 -- messages will be placed.
416 Actual_Error_Loc := Instantiation (X);
417 X := Get_Source_File_Index (Actual_Error_Loc);
418 exit when Instantiation (X) = No_Location;
421 -- Since we are generating the messages at the instantiation point in
422 -- any case, we do not want the references to the bad lines in the
423 -- instance to be annotated with the location of the instantiation.
425 Suppress_Instance_Location := True;
426 Msg_Cont_Status := False;
428 -- Loop to generate instantiation messages
430 Error_Msg_Sloc := Flag_Location;
431 X := Get_Source_File_Index (Flag_Location);
432 while Instantiation (X) /= No_Location loop
434 -- Suppress instantiation message on continuation lines
436 if Msg (Msg'First) /= '\' then
438 -- Case of inlined body
440 if Inlined_Body (X) then
441 if Is_Warning_Msg or else Is_Style_Msg then
443 ("?in inlined body #",
444 Actual_Error_Loc, Flag_Location, Msg_Cont_Status);
447 ("error in inlined body #",
448 Actual_Error_Loc, Flag_Location, Msg_Cont_Status);
451 -- Case of generic instantiation
454 if Is_Warning_Msg or else Is_Style_Msg then
456 ("?in instantiation #",
457 Actual_Error_Loc, Flag_Location, Msg_Cont_Status);
460 ("instantiation error #",
461 Actual_Error_Loc, Flag_Location, Msg_Cont_Status);
466 Error_Msg_Sloc := Instantiation (X);
467 X := Get_Source_File_Index (Error_Msg_Sloc);
468 Msg_Cont_Status := True;
471 Suppress_Instance_Location := False;
472 Error_Msg_Sloc := Save_Error_Msg_Sloc;
474 -- Here we output the original message on the outer instantiation
477 (Msg, Actual_Error_Loc, Flag_Location, Msg_Cont_Status);
481 --------------------------------
482 -- Error_Msg_Ada_2012_Feature --
483 --------------------------------
485 procedure Error_Msg_Ada_2012_Feature (Feature : String; Loc : Source_Ptr) is
487 if Ada_Version < Ada_2012 then
488 Error_Msg (Feature & " is an Ada 2012 feature", Loc);
490 if No (Ada_Version_Pragma) then
491 Error_Msg ("\unit must be compiled with -gnat2012 switch", Loc);
493 Error_Msg_Sloc := Sloc (Ada_Version_Pragma);
494 Error_Msg ("\incompatible with Ada version set#", Loc);
497 end Error_Msg_Ada_2012_Feature;
503 procedure Error_Msg_AP (Msg : String) is
508 -- If we had saved the Scan_Ptr value after scanning the previous
509 -- token, then we would have exactly the right place for putting
510 -- the flag immediately at hand. However, that would add at least
511 -- two instructions to a Scan call *just* to service the possibility
512 -- of an Error_Msg_AP call. So instead we reconstruct that value.
514 -- We have two possibilities, start with Prev_Token_Ptr and skip over
515 -- the current token, which is made harder by the possibility that this
516 -- token may be in error, or start with Token_Ptr and work backwards.
517 -- We used to take the second approach, but it's hard because of
518 -- comments, and harder still because things that look like comments
519 -- can appear inside strings. So now we take the first approach.
521 -- Note: in the case where there is no previous token, Prev_Token_Ptr
522 -- is set to Source_First, which is a reasonable position for the
523 -- error flag in this situation.
525 S1 := Prev_Token_Ptr;
528 -- If the previous token is a string literal, we need a special approach
529 -- since there may be white space inside the literal and we don't want
530 -- to stop on that white space.
532 -- Note: since this is an error recovery issue anyway, it is not worth
533 -- worrying about special UTF_32 line terminator characters here.
535 if Prev_Token = Tok_String_Literal then
539 if Source (S1) = C then
541 exit when Source (S1) /= C;
542 elsif Source (S1) in Line_Terminator then
547 -- Character literal also needs special handling
549 elsif Prev_Token = Tok_Char_Literal then
552 -- Otherwise we search forward for the end of the current token, marked
553 -- by a line terminator, white space, a comment symbol or if we bump
554 -- into the following token (i.e. the current token).
556 -- Again, it is not worth worrying about UTF_32 special line terminator
557 -- characters in this context, since this is only for error recovery.
560 while Source (S1) not in Line_Terminator
561 and then Source (S1) /= ' '
562 and then Source (S1) /= ASCII.HT
563 and then (Source (S1) /= '-' or else Source (S1 + 1) /= '-')
564 and then S1 /= Token_Ptr
570 -- S1 is now set to the location for the flag
579 procedure Error_Msg_BC (Msg : String) is
581 -- If we are at end of file, post the flag after the previous token
583 if Token = Tok_EOF then
586 -- If we are at start of file, post the flag at the current token
588 elsif Token_Ptr = Source_First (Current_Source_File) then
591 -- If the character before the current token is a space or a horizontal
592 -- tab, then we place the flag on this character (in the case of a tab
593 -- we would really like to place it in the "last" character of the tab
594 -- space, but that it too much trouble to worry about).
596 elsif Source (Token_Ptr - 1) = ' '
597 or else Source (Token_Ptr - 1) = ASCII.HT
599 Error_Msg (Msg, Token_Ptr - 1);
601 -- If there is no space or tab before the current token, then there is
602 -- no room to place the flag before the token, so we place it on the
603 -- token instead (this happens for example at the start of a line).
606 Error_Msg (Msg, Token_Ptr);
614 procedure Error_Msg_CRT (Feature : String; N : Node_Id) is
615 CNRT : constant String := " not allowed in no run time mode";
616 CCRT : constant String := " not supported by configuration>";
618 S : String (1 .. Feature'Length + 1 + CCRT'Length);
623 S (2 .. Feature'Length + 1) := Feature;
624 L := Feature'Length + 2;
626 if No_Run_Time_Mode then
627 S (L .. L + CNRT'Length - 1) := CNRT;
628 L := L + CNRT'Length - 1;
630 else pragma Assert (Configurable_Run_Time_Mode);
631 S (L .. L + CCRT'Length - 1) := CCRT;
632 L := L + CCRT'Length - 1;
635 Error_Msg_N (S (1 .. L), N);
636 Configurable_Run_Time_Violations := Configurable_Run_Time_Violations + 1;
643 procedure Error_Msg_PT (Typ : Node_Id; Subp : Node_Id) is
646 ("first formal of & must be of mode `OUT`, `IN OUT` or " &
647 "access-to-variable", Typ, Subp);
649 ("\in order to be overridden by protected procedure or entry " &
650 "(RM 9.4(11.9/2))", Typ);
657 procedure Error_Msg_F (Msg : String; N : Node_Id) is
659 Error_Msg_NEL (Msg, N, N, Sloc (First_Node (N)));
666 procedure Error_Msg_FE
669 E : Node_Or_Entity_Id)
672 Error_Msg_NEL (Msg, N, E, Sloc (First_Node (N)));
675 ------------------------
676 -- Error_Msg_Internal --
677 ------------------------
679 procedure Error_Msg_Internal
685 Next_Msg : Error_Msg_Id;
686 -- Pointer to next message at insertion point
688 Prev_Msg : Error_Msg_Id;
689 -- Pointer to previous message at insertion point
691 Temp_Msg : Error_Msg_Id;
694 -- Set if warning to be treated as error
696 procedure Handle_Serious_Error;
697 -- Internal procedure to do all error message handling for a serious
698 -- error message, other than bumping the error counts and arranging
699 -- for the message to be output.
701 --------------------------
702 -- Handle_Serious_Error --
703 --------------------------
705 procedure Handle_Serious_Error is
707 -- Turn off code generation if not done already
709 if Operating_Mode = Generate_Code then
710 Operating_Mode := Check_Semantics;
711 Expander_Active := False;
714 -- Set the fatal error flag in the unit table unless we are in
715 -- Try_Semantics mode. This stops the semantics from being performed
716 -- if we find a serious error. This is skipped if we are currently
717 -- dealing with the configuration pragma file.
719 if not Try_Semantics and then Current_Source_Unit /= No_Unit then
720 Set_Fatal_Error (Get_Source_Unit (Sptr));
722 end Handle_Serious_Error;
724 -- Start of processing for Error_Msg_Internal
727 if Raise_Exception_On_Error /= 0 then
728 raise Error_Msg_Exception;
731 Continuation := Msg_Cont;
732 Continuation_New_Line := False;
733 Suppress_Message := False;
734 Kill_Message := False;
735 Warning_Msg_Char := ' ';
736 Set_Msg_Text (Msg, Sptr);
738 -- Kill continuation if parent message killed
740 if Continuation and Last_Killed then
744 -- Return without doing anything if message is suppressed
747 and then not All_Errors_Mode
748 and then not Is_Warning_Msg
749 and then not Is_Unconditional_Msg
751 if not Continuation then
758 -- Return without doing anything if message is killed and this is not
759 -- the first error message. The philosophy is that if we get a weird
760 -- error message and we already have had a message, then we hope the
761 -- weird message is a junk cascaded message
764 and then not All_Errors_Mode
765 and then Total_Errors_Detected /= 0
767 if not Continuation then
774 -- Special check for warning message to see if it should be output
776 if Is_Warning_Msg then
778 -- Immediate return if warning message and warnings are suppressed
780 if Warnings_Suppressed (Optr) /= No_String
782 Warnings_Suppressed (Sptr) /= No_String
784 Cur_Msg := No_Error_Msg;
788 -- If the flag location is in the main extended source unit then for
789 -- sure we want the warning since it definitely belongs
791 if In_Extended_Main_Source_Unit (Sptr) then
794 -- If the main unit has not been read yet. the warning must be on
795 -- a configuration file: gnat.adc or user-defined. This means we
796 -- are not parsing the main unit yet, so skip following checks.
798 elsif No (Cunit (Main_Unit)) then
801 -- If the flag location is not in the main extended source unit, then
802 -- we want to eliminate the warning, unless it is in the extended
803 -- main code unit and we want warnings on the instance.
805 elsif In_Extended_Main_Code_Unit (Sptr) and then Warn_On_Instance then
808 -- Keep warning if debug flag G set
810 elsif Debug_Flag_GG then
813 -- Keep warning if message text contains !!
815 elsif Has_Double_Exclam then
818 -- Here is where we delete a warning from a with'ed unit
821 Cur_Msg := No_Error_Msg;
823 if not Continuation then
831 -- If message is to be ignored in special ignore message mode, this is
832 -- where we do this special processing, bypassing message output.
834 if Ignore_Errors_Enable > 0 then
835 if Is_Serious_Error then
836 Handle_Serious_Error;
842 -- If error message line length set, and this is a continuation message
843 -- then all we do is to append the text to the text of the last message
844 -- with a comma space separator (eliminating a possible (style) or
847 if Error_Msg_Line_Length /= 0 and then Continuation then
848 Cur_Msg := Errors.Last;
851 Oldm : String_Ptr := Errors.Table (Cur_Msg).Text;
852 Newm : String (1 .. Oldm'Last + 2 + Msglen);
857 -- First copy old message to new one and free it
859 Newm (Oldm'Range) := Oldm.all;
863 -- Remove (style) or info: at start of message
865 if Msglen > 8 and then Msg_Buffer (1 .. 8) = "(style) " then
868 elsif Msglen > 6 and then Msg_Buffer (1 .. 6) = "info: " then
875 -- Now deal with separation between messages. Normally this is
876 -- simply comma space, but there are some special cases.
878 -- If continuation new line, then put actual NL character in msg
880 if Continuation_New_Line then
882 Newm (Newl) := ASCII.LF;
884 -- If continuation message is enclosed in parentheses, then
885 -- special treatment (don't need a comma, and we want to combine
886 -- successive parenthetical remarks into a single one with
887 -- separating commas).
889 elsif Msg_Buffer (M) = '(' and then Msg_Buffer (Msglen) = ')' then
891 -- Case where existing message ends in right paren, remove
892 -- and separate parenthetical remarks with a comma.
894 if Newm (Newl) = ')' then
896 Msg_Buffer (M) := ' ';
898 -- Case where we are adding new parenthetical comment
905 -- Case where continuation not in parens and no new line
908 Newm (Newl + 1 .. Newl + 2) := ", ";
912 -- Append new message
914 Newm (Newl + 1 .. Newl + Msglen - M + 1) :=
915 Msg_Buffer (M .. Msglen);
916 Newl := Newl + Msglen - M + 1;
917 Errors.Table (Cur_Msg).Text := new String'(Newm (1 .. Newl));
919 -- Update warning msg flag and message doc char if needed
921 if Is_Warning_Msg then
922 if not Errors.Table (Cur_Msg).Warn then
923 Errors.Table (Cur_Msg).Warn := True;
924 Errors.Table (Cur_Msg).Warn_Chr := Warning_Msg_Char;
926 elsif Warning_Msg_Char /= ' ' then
927 Errors.Table (Cur_Msg).Warn_Chr := Warning_Msg_Char;
935 -- Here we build a new error object
938 ((Text => new String'(Msg_Buffer (1 .. Msglen)),
939 Next => No_Error_Msg,
940 Prev => No_Error_Msg,
943 Sfile => Get_Source_File_Index (Sptr),
944 Line => Get_Physical_Line_Number (Sptr),
945 Col => Get_Column_Number (Sptr),
946 Warn => Is_Warning_Msg,
947 Warn_Err => False, -- reset below
948 Warn_Chr => Warning_Msg_Char,
949 Style => Is_Style_Msg,
950 Serious => Is_Serious_Error,
951 Uncond => Is_Unconditional_Msg,
952 Msg_Cont => Continuation,
954 Cur_Msg := Errors.Last;
956 -- Test if warning to be treated as error
960 and then (Warning_Treated_As_Error (Msg_Buffer (1 .. Msglen))
962 Warning_Treated_As_Error (Get_Warning_Tag (Cur_Msg)));
964 -- Propagate Warn_Err to this message and preceding continuations
966 for J in reverse 1 .. Errors.Last loop
967 Errors.Table (J).Warn_Err := Warn_Err;
968 exit when not Errors.Table (J).Msg_Cont;
971 -- If immediate errors mode set, output error message now. Also output
972 -- now if the -d1 debug flag is set (so node number message comes out
973 -- just before actual error message)
975 if Debug_Flag_OO or else Debug_Flag_1 then
978 (Errors.Table (Cur_Msg).Line, Errors.Table (Cur_Msg).Sfile, True);
980 Output_Error_Msgs (Temp_Msg);
982 -- If not in immediate errors mode, then we insert the message in the
983 -- error chain for later output by Finalize. The messages are sorted
984 -- first by unit (main unit comes first), and within a unit by source
985 -- location (earlier flag location first in the chain).
988 -- First a quick check, does this belong at the very end of the chain
989 -- of error messages. This saves a lot of time in the normal case if
990 -- there are lots of messages.
992 if Last_Error_Msg /= No_Error_Msg
993 and then Errors.Table (Cur_Msg).Sfile =
994 Errors.Table (Last_Error_Msg).Sfile
995 and then (Sptr > Errors.Table (Last_Error_Msg).Sptr
997 (Sptr = Errors.Table (Last_Error_Msg).Sptr
999 Optr > Errors.Table (Last_Error_Msg).Optr))
1001 Prev_Msg := Last_Error_Msg;
1002 Next_Msg := No_Error_Msg;
1004 -- Otherwise do a full sequential search for the insertion point
1007 Prev_Msg := No_Error_Msg;
1008 Next_Msg := First_Error_Msg;
1009 while Next_Msg /= No_Error_Msg loop
1011 Errors.Table (Cur_Msg).Sfile < Errors.Table (Next_Msg).Sfile;
1013 if Errors.Table (Cur_Msg).Sfile = Errors.Table (Next_Msg).Sfile
1015 exit when Sptr < Errors.Table (Next_Msg).Sptr
1016 or else (Sptr = Errors.Table (Next_Msg).Sptr
1017 and then Optr < Errors.Table (Next_Msg).Optr);
1020 Prev_Msg := Next_Msg;
1021 Next_Msg := Errors.Table (Next_Msg).Next;
1025 -- Now we insert the new message in the error chain. The insertion
1026 -- point for the message is after Prev_Msg and before Next_Msg.
1028 -- The possible insertion point for the new message is after Prev_Msg
1029 -- and before Next_Msg. However, this is where we do a special check
1030 -- for redundant parsing messages, defined as messages posted on the
1031 -- same line. The idea here is that probably such messages are junk
1032 -- from the parser recovering. In full errors mode, we don't do this
1033 -- deletion, but otherwise such messages are discarded at this stage.
1035 if Prev_Msg /= No_Error_Msg
1036 and then Errors.Table (Prev_Msg).Line =
1037 Errors.Table (Cur_Msg).Line
1038 and then Errors.Table (Prev_Msg).Sfile =
1039 Errors.Table (Cur_Msg).Sfile
1040 and then Compiler_State = Parsing
1041 and then not All_Errors_Mode
1043 -- Don't delete unconditional messages and at this stage, don't
1044 -- delete continuation lines (we attempted to delete those earlier
1045 -- if the parent message was deleted.
1047 if not Errors.Table (Cur_Msg).Uncond
1048 and then not Continuation
1050 -- Don't delete if prev msg is warning and new msg is an error.
1051 -- This is because we don't want a real error masked by a
1052 -- warning. In all other cases (that is parse errors for the
1053 -- same line that are not unconditional) we do delete the
1054 -- message. This helps to avoid junk extra messages from
1055 -- cascaded parsing errors
1057 if not (Errors.Table (Prev_Msg).Warn
1059 Errors.Table (Prev_Msg).Style)
1061 (Errors.Table (Cur_Msg).Warn
1063 Errors.Table (Cur_Msg).Style)
1065 -- All tests passed, delete the message by simply returning
1066 -- without any further processing.
1068 if not Continuation then
1069 Last_Killed := True;
1077 -- Come here if message is to be inserted in the error chain
1079 if not Continuation then
1080 Last_Killed := False;
1083 if Prev_Msg = No_Error_Msg then
1084 First_Error_Msg := Cur_Msg;
1086 Errors.Table (Prev_Msg).Next := Cur_Msg;
1089 Errors.Table (Cur_Msg).Next := Next_Msg;
1091 if Next_Msg = No_Error_Msg then
1092 Last_Error_Msg := Cur_Msg;
1096 -- Bump appropriate statistics count
1098 if Errors.Table (Cur_Msg).Warn or else Errors.Table (Cur_Msg).Style then
1099 Warnings_Detected := Warnings_Detected + 1;
1102 Total_Errors_Detected := Total_Errors_Detected + 1;
1104 if Errors.Table (Cur_Msg).Serious then
1105 Serious_Errors_Detected := Serious_Errors_Detected + 1;
1106 Handle_Serious_Error;
1110 -- If too many warnings turn off warnings
1112 if Maximum_Messages /= 0 then
1113 if Warnings_Detected = Maximum_Messages then
1114 Warning_Mode := Suppress;
1117 -- If too many errors abandon compilation
1119 if Total_Errors_Detected = Maximum_Messages then
1120 raise Unrecoverable_Error;
1123 end Error_Msg_Internal;
1129 procedure Error_Msg_N (Msg : String; N : Node_Or_Entity_Id) is
1131 Error_Msg_NEL (Msg, N, N, Sloc (N));
1138 procedure Error_Msg_NE
1140 N : Node_Or_Entity_Id;
1141 E : Node_Or_Entity_Id)
1144 Error_Msg_NEL (Msg, N, E, Sloc (N));
1151 procedure Error_Msg_NEL
1153 N : Node_Or_Entity_Id;
1154 E : Node_Or_Entity_Id;
1155 Flag_Location : Source_Ptr)
1158 if Special_Msg_Delete (Msg, N, E) then
1162 Test_Style_Warning_Serious_Unconditional_Msg (Msg);
1164 -- Special handling for warning messages
1166 if Is_Warning_Msg then
1168 -- Suppress if no warnings set for either entity or node
1170 if No_Warnings (N) or else No_Warnings (E) then
1172 -- Disable any continuation messages as well
1174 Last_Killed := True;
1178 -- Suppress if inside loop that is known to be null or is probably
1179 -- null (case where loop executes only if invalid values present).
1180 -- In either case warnings in the loop are likely to be junk.
1187 while Present (P) loop
1188 if Nkind (P) = N_Loop_Statement
1189 and then Suppress_Loop_Warnings (P)
1199 -- Test for message to be output
1202 or else Is_Unconditional_Msg
1203 or else Is_Warning_Msg
1205 or else (Msg (Msg'First) = '\' and then not Last_Killed)
1208 Error_Msg_Node_1 := E;
1209 Error_Msg (Msg, Flag_Location);
1212 Last_Killed := True;
1215 if not (Is_Warning_Msg or Is_Style_Msg) then
1224 procedure Error_Msg_NW
1227 N : Node_Or_Entity_Id)
1231 and then In_Extended_Main_Source_Unit (N)
1232 and then Comes_From_Source (N)
1234 Error_Msg_NEL (Msg, N, N, Sloc (N));
1242 procedure Error_Msg_S (Msg : String) is
1244 Error_Msg (Msg, Scan_Ptr);
1251 procedure Error_Msg_SC (Msg : String) is
1253 -- If we are at end of file, post the flag after the previous token
1255 if Token = Tok_EOF then
1258 -- For all other cases the message is posted at the current token
1262 Error_Msg (Msg, Token_Ptr);
1270 procedure Error_Msg_SP (Msg : String) is
1272 -- Note: in the case where there is no previous token, Prev_Token_Ptr
1273 -- is set to Source_First, which is a reasonable position for the
1274 -- error flag in this situation
1276 Error_Msg (Msg, Prev_Token_Ptr);
1283 procedure Finalize (Last_Call : Boolean) is
1288 procedure Delete_Warning (E : Error_Msg_Id);
1289 -- Delete a message if not already deleted and adjust warning count
1291 --------------------
1292 -- Delete_Warning --
1293 --------------------
1295 procedure Delete_Warning (E : Error_Msg_Id) is
1297 if not Errors.Table (E).Deleted then
1298 Errors.Table (E).Deleted := True;
1299 Warnings_Detected := Warnings_Detected - 1;
1303 -- Start of message for Finalize
1306 -- Set Prev pointers
1308 Cur := First_Error_Msg;
1309 while Cur /= No_Error_Msg loop
1310 Nxt := Errors.Table (Cur).Next;
1311 exit when Nxt = No_Error_Msg;
1312 Errors.Table (Nxt).Prev := Cur;
1316 -- Eliminate any duplicated error messages from the list. This is
1317 -- done after the fact to avoid problems with Change_Error_Text.
1319 Cur := First_Error_Msg;
1320 while Cur /= No_Error_Msg loop
1321 Nxt := Errors.Table (Cur).Next;
1324 while F /= No_Error_Msg
1325 and then Errors.Table (F).Sptr = Errors.Table (Cur).Sptr
1327 Check_Duplicate_Message (Cur, F);
1328 F := Errors.Table (F).Next;
1334 -- Mark any messages suppressed by specific warnings as Deleted
1336 Cur := First_Error_Msg;
1337 while Cur /= No_Error_Msg loop
1339 CE : Error_Msg_Object renames Errors.Table (Cur);
1340 Tag : constant String := Get_Warning_Tag (Cur);
1343 if (CE.Warn and not CE.Deleted)
1345 (Warning_Specifically_Suppressed (CE.Sptr, CE.Text, Tag) /=
1348 Warning_Specifically_Suppressed (CE.Optr, CE.Text, Tag) /=
1351 Delete_Warning (Cur);
1353 -- If this is a continuation, delete previous messages
1356 while Errors.Table (F).Msg_Cont loop
1357 F := Errors.Table (F).Prev;
1361 -- Delete any following continuations
1365 F := Errors.Table (F).Next;
1366 exit when F = No_Error_Msg;
1367 exit when not Errors.Table (F).Msg_Cont;
1373 Cur := Errors.Table (Cur).Next;
1376 Finalize_Called := True;
1378 -- Check consistency of specific warnings (may add warnings). We only
1379 -- do this on the last call, after all possible warnings are posted.
1382 Validate_Specific_Warnings (Error_Msg'Access);
1390 function First_Node (C : Node_Id) return Node_Id is
1391 Orig : constant Node_Id := Original_Node (C);
1392 Loc : constant Source_Ptr := Sloc (Orig);
1393 Sfile : constant Source_File_Index := Get_Source_File_Index (Loc);
1397 function Test_Earlier (N : Node_Id) return Traverse_Result;
1398 -- Function applied to every node in the construct
1400 procedure Search_Tree_First is new Traverse_Proc (Test_Earlier);
1401 -- Create traversal procedure
1407 function Test_Earlier (N : Node_Id) return Traverse_Result is
1408 Norig : constant Node_Id := Original_Node (N);
1409 Loc : constant Source_Ptr := Sloc (Norig);
1412 -- Check for earlier
1416 -- Ignore nodes with no useful location information
1418 and then Loc /= Standard_Location
1419 and then Loc /= No_Location
1421 -- Ignore nodes from a different file. This ensures against cases
1422 -- of strange foreign code somehow being present. We don't want
1423 -- wild placement of messages if that happens.
1425 and then Get_Source_File_Index (Loc) = Sfile
1434 -- Start of processing for First_Node
1437 if Nkind (Orig) in N_Subexpr then
1440 Search_Tree_First (Orig);
1452 function First_Sloc (N : Node_Id) return Source_Ptr is
1453 SI : constant Source_File_Index := Source_Index (Get_Source_Unit (N));
1454 SF : constant Source_Ptr := Source_First (SI);
1459 F := First_Node (N);
1462 -- The following circuit is a bit subtle. When we have parenthesized
1463 -- expressions, then the Sloc will not record the location of the paren,
1464 -- but we would like to post the flag on the paren. So what we do is to
1465 -- crawl up the tree from the First_Node, adjusting the Sloc value for
1466 -- any parentheses we know are present. Yes, we know this circuit is not
1467 -- 100% reliable (e.g. because we don't record all possible paren level
1468 -- values), but this is only for an error message so it is good enough.
1471 Paren_Loop : for J in 1 .. Paren_Count (F) loop
1473 -- We don't look more than 12 characters behind the current
1474 -- location, and in any case not past the front of the source.
1476 Search_Loop : for K in 1 .. 12 loop
1477 exit Search_Loop when S = SF;
1479 if Source_Text (SI) (S - 1) = '(' then
1483 elsif Source_Text (SI) (S - 1) <= ' ' then
1489 end loop Search_Loop;
1490 end loop Paren_Loop;
1492 exit Node_Loop when F = N;
1494 exit Node_Loop when Nkind (F) not in N_Subexpr;
1500 -----------------------
1501 -- Get_Ignore_Errors --
1502 -----------------------
1504 function Get_Ignore_Errors return Boolean is
1506 return Errors_Must_Be_Ignored;
1507 end Get_Ignore_Errors;
1513 procedure Initialize is
1516 First_Error_Msg := No_Error_Msg;
1517 Last_Error_Msg := No_Error_Msg;
1518 Serious_Errors_Detected := 0;
1519 Total_Errors_Detected := 0;
1520 Warnings_Treated_As_Errors := 0;
1521 Warnings_Detected := 0;
1522 Warnings_As_Errors_Count := 0;
1523 Cur_Msg := No_Error_Msg;
1526 -- Initialize warnings tables
1529 Specific_Warnings.Init;
1536 function No_Warnings (N : Node_Or_Entity_Id) return Boolean is
1538 if Error_Posted (N) then
1541 elsif Nkind (N) in N_Entity and then Has_Warnings_Off (N) then
1544 elsif Is_Entity_Name (N)
1545 and then Present (Entity (N))
1546 and then Has_Warnings_Off (Entity (N))
1559 function OK_Node (N : Node_Id) return Boolean is
1560 K : constant Node_Kind := Nkind (N);
1563 if Error_Posted (N) then
1566 elsif K in N_Has_Etype
1567 and then Present (Etype (N))
1568 and then Error_Posted (Etype (N))
1573 or else K = N_Attribute_Reference
1574 or else K = N_Character_Literal
1575 or else K = N_Expanded_Name
1576 or else K = N_Identifier
1577 or else K = N_Operator_Symbol)
1578 and then Present (Entity (N))
1579 and then Error_Posted (Entity (N))
1587 ---------------------
1588 -- Output_Messages --
1589 ---------------------
1591 procedure Output_Messages is
1595 procedure Write_Error_Summary;
1596 -- Write error summary
1598 procedure Write_Header (Sfile : Source_File_Index);
1599 -- Write header line (compiling or checking given file)
1601 procedure Write_Max_Errors;
1602 -- Write message if max errors reached
1604 -------------------------
1605 -- Write_Error_Summary --
1606 -------------------------
1608 procedure Write_Error_Summary is
1610 -- Extra blank line if error messages or source listing were output
1612 if Total_Errors_Detected + Warnings_Detected > 0
1618 -- Message giving number of lines read and number of errors detected.
1619 -- This normally goes to Standard_Output. The exception is when brief
1620 -- mode is not set, verbose mode (or full list mode) is set, and
1621 -- there are errors. In this case we send the message to standard
1622 -- error to make sure that *something* appears on standard error in
1623 -- an error situation.
1625 -- Formerly, only the "# errors" suffix was sent to stderr, whereas
1626 -- "# lines:" appeared on stdout. This caused problems on VMS when
1627 -- the stdout buffer was flushed, giving an extra line feed after
1630 if Total_Errors_Detected + Warnings_Detected /= 0
1631 and then not Brief_Output
1632 and then (Verbose_Mode or Full_List)
1637 -- Message giving total number of lines. Don't give this message if
1638 -- the Main_Source line is unknown (this happens in error situations,
1639 -- e.g. when integrated preprocessing fails).
1641 if Main_Source_File /= No_Source_File then
1643 Write_Int (Num_Source_Lines (Main_Source_File));
1645 if Num_Source_Lines (Main_Source_File) = 1 then
1646 Write_Str (" line: ");
1648 Write_Str (" lines: ");
1652 if Total_Errors_Detected = 0 then
1653 Write_Str ("No errors");
1655 elsif Total_Errors_Detected = 1 then
1656 Write_Str ("1 error");
1659 Write_Int (Total_Errors_Detected);
1660 Write_Str (" errors");
1663 if Warnings_Detected /= 0 then
1665 Write_Int (Warnings_Detected);
1666 Write_Str (" warning");
1668 if Warnings_Detected /= 1 then
1672 if Warning_Mode = Treat_As_Error then
1673 Write_Str (" (treated as error");
1675 if Warnings_Detected /= 1 then
1681 elsif Warnings_Treated_As_Errors /= 0 then
1683 Write_Int (Warnings_Treated_As_Errors);
1684 Write_Str (" treated as errors)");
1689 Set_Standard_Output;
1690 end Write_Error_Summary;
1696 procedure Write_Header (Sfile : Source_File_Index) is
1698 if Verbose_Mode or Full_List then
1699 if Original_Operating_Mode = Generate_Code then
1700 Write_Str ("Compiling: ");
1702 Write_Str ("Checking: ");
1705 Write_Name (Full_File_Name (Sfile));
1707 if not Debug_Flag_7 then
1708 Write_Str (" (source file time stamp: ");
1709 Write_Time_Stamp (Sfile);
1717 ----------------------
1718 -- Write_Max_Errors --
1719 ----------------------
1721 procedure Write_Max_Errors is
1723 if Maximum_Messages /= 0 then
1724 if Warnings_Detected >= Maximum_Messages then
1726 Write_Line ("maximum number of warnings output");
1727 Write_Line ("any further warnings suppressed");
1728 Set_Standard_Output;
1731 -- If too many errors print message
1733 if Total_Errors_Detected >= Maximum_Messages then
1735 Write_Line ("fatal error: maximum number of errors detected");
1736 Set_Standard_Output;
1739 end Write_Max_Errors;
1741 -- Start of processing for Output_Messages
1744 -- Error if Finalize has not been called
1746 if not Finalize_Called then
1747 raise Program_Error;
1750 -- Reset current error source file if the main unit has a pragma
1751 -- Source_Reference. This ensures outputting the proper name of
1752 -- the source file in this situation.
1754 if Main_Source_File = No_Source_File
1755 or else Num_SRef_Pragmas (Main_Source_File) /= 0
1757 Current_Error_Source_File := No_Source_File;
1762 if Brief_Output or (not Full_List and not Verbose_Mode) then
1765 E := First_Error_Msg;
1766 while E /= No_Error_Msg loop
1767 if not Errors.Table (E).Deleted and then not Debug_Flag_KK then
1768 if Full_Path_Name_For_Brief_Errors then
1769 Write_Name (Full_Ref_Name (Errors.Table (E).Sfile));
1771 Write_Name (Reference_Name (Errors.Table (E).Sfile));
1775 Write_Int (Int (Physical_To_Logical
1776 (Errors.Table (E).Line,
1777 Errors.Table (E).Sfile)));
1780 if Errors.Table (E).Col < 10 then
1784 Write_Int (Int (Errors.Table (E).Col));
1786 Output_Msg_Text (E);
1790 E := Errors.Table (E).Next;
1793 Set_Standard_Output;
1796 -- Full source listing case
1799 List_Pragmas_Index := 1;
1800 List_Pragmas_Mode := True;
1801 E := First_Error_Msg;
1803 -- Normal case, to stdout (copyright notice already output)
1805 if Full_List_File_Name = null then
1806 if not Debug_Flag_7 then
1813 Create_List_File_Access.all (Full_List_File_Name.all);
1814 Set_Special_Output (Write_List_Info_Access.all'Access);
1816 -- Write copyright notice to file
1818 if not Debug_Flag_7 then
1819 Write_Str ("GNAT ");
1820 Write_Str (Gnat_Version_String);
1822 Write_Str ("Copyright 1992-" &
1824 ", Free Software Foundation, Inc.");
1829 -- First list extended main source file units with errors
1831 for U in Main_Unit .. Last_Unit loop
1832 if In_Extended_Main_Source_Unit (Cunit_Entity (U))
1834 -- If debug flag d.m is set, only the main source is listed
1836 and then (U = Main_Unit or else not Debug_Flag_Dot_M)
1838 -- If the unit of the entity does not come from source, it is
1839 -- an implicit subprogram declaration for a child subprogram.
1840 -- Do not emit errors for it, they are listed with the body.
1843 (No (Cunit_Entity (U))
1844 or else Comes_From_Source (Cunit_Entity (U))
1845 or else not Is_Subprogram (Cunit_Entity (U)))
1848 Sfile : constant Source_File_Index := Source_Index (U);
1853 -- Only write the header if Sfile is known
1855 if Sfile /= No_Source_File then
1856 Write_Header (Sfile);
1860 -- Normally, we don't want an "error messages from file"
1861 -- message when listing the entire file, so we set the
1862 -- current source file as the current error source file.
1863 -- However, the old style of doing things was to list this
1864 -- message if pragma Source_Reference is present, even for
1865 -- the main unit. Since the purpose of the -gnatd.m switch
1866 -- is to duplicate the old behavior, we skip the reset if
1867 -- this debug flag is set.
1869 if not Debug_Flag_Dot_M then
1870 Current_Error_Source_File := Sfile;
1873 -- Only output the listing if Sfile is known, to avoid
1874 -- crashing the compiler.
1876 if Sfile /= No_Source_File then
1877 for N in 1 .. Last_Source_Line (Sfile) loop
1878 while E /= No_Error_Msg
1879 and then Errors.Table (E).Deleted
1881 E := Errors.Table (E).Next;
1886 and then Errors.Table (E).Line = N
1887 and then Errors.Table (E).Sfile = Sfile;
1889 Output_Source_Line (N, Sfile, Err_Flag);
1892 Output_Error_Msgs (E);
1894 if not Debug_Flag_2 then
1904 -- Then output errors, if any, for subsidiary units not in the
1905 -- main extended unit.
1907 -- Note: if debug flag d.m set, include errors for any units other
1908 -- than the main unit in the extended source unit (e.g. spec and
1909 -- subunits for a body).
1911 while E /= No_Error_Msg
1912 and then (not In_Extended_Main_Source_Unit (Errors.Table (E).Sptr)
1915 and then Get_Source_Unit
1916 (Errors.Table (E).Sptr) /= Main_Unit))
1918 if Errors.Table (E).Deleted then
1919 E := Errors.Table (E).Next;
1924 (Errors.Table (E).Line, Errors.Table (E).Sfile, True);
1925 Output_Error_Msgs (E);
1929 -- If output to file, write extra copy of error summary to the
1930 -- output file, and then close it.
1932 if Full_List_File_Name /= null then
1933 Write_Error_Summary;
1935 Close_List_File_Access.all;
1936 Cancel_Special_Output;
1940 -- Verbose mode (error lines only with error flags). Normally this is
1941 -- ignored in full list mode, unless we are listing to a file, in which
1942 -- case we still generate -gnatv output to standard output.
1945 and then (not Full_List or else Full_List_File_Name /= null)
1949 -- Output the header only when Main_Source_File is known
1951 if Main_Source_File /= No_Source_File then
1952 Write_Header (Main_Source_File);
1955 E := First_Error_Msg;
1957 -- Loop through error lines
1959 while E /= No_Error_Msg loop
1960 if Errors.Table (E).Deleted then
1961 E := Errors.Table (E).Next;
1965 (Errors.Table (E).Line, Errors.Table (E).Sfile, True);
1966 Output_Error_Msgs (E);
1971 -- Output error summary if verbose or full list mode
1973 if Verbose_Mode or else Full_List then
1974 Write_Error_Summary;
1979 if Warning_Mode = Treat_As_Error then
1980 Total_Errors_Detected := Total_Errors_Detected + Warnings_Detected;
1981 Warnings_Detected := 0;
1983 end Output_Messages;
1985 ------------------------
1986 -- Output_Source_Line --
1987 ------------------------
1989 procedure Output_Source_Line
1990 (L : Physical_Line_Number;
1991 Sfile : Source_File_Index;
1997 Line_Number_Output : Boolean := False;
1998 -- Set True once line number is output
2000 Empty_Line : Boolean := True;
2001 -- Set False if line includes at least one character
2004 if Sfile /= Current_Error_Source_File then
2005 Write_Str ("==============Error messages for ");
2007 case Sinput.File_Type (Sfile) is
2009 Write_Str ("source");
2011 when Sinput.Config =>
2012 Write_Str ("configuration pragmas");
2015 Write_Str ("symbol definition");
2017 when Sinput.Preproc =>
2018 Write_Str ("preprocessing data");
2021 Write_Str (" file: ");
2022 Write_Name (Full_File_Name (Sfile));
2025 if Num_SRef_Pragmas (Sfile) > 0 then
2026 Write_Str ("--------------Line numbers from file: ");
2027 Write_Name (Full_Ref_Name (Sfile));
2028 Write_Str (" (starting at line ");
2029 Write_Int (Int (First_Mapped_Line (Sfile)));
2034 Current_Error_Source_File := Sfile;
2037 if Errs or List_Pragmas_Mode then
2038 Output_Line_Number (Physical_To_Logical (L, Sfile));
2039 Line_Number_Output := True;
2042 S := Line_Start (L, Sfile);
2045 C := Source_Text (Sfile) (S);
2046 exit when C = ASCII.LF or else C = ASCII.CR or else C = EOF;
2048 -- Deal with matching entry in List_Pragmas table
2051 and then List_Pragmas_Index <= List_Pragmas.Last
2052 and then S = List_Pragmas.Table (List_Pragmas_Index).Ploc
2054 case List_Pragmas.Table (List_Pragmas_Index).Ptyp is
2058 -- Ignore if on line with errors so that error flags
2059 -- get properly listed with the error line .
2062 Write_Char (ASCII.FF);
2066 List_Pragmas_Mode := True;
2068 if not Line_Number_Output then
2069 Output_Line_Number (Physical_To_Logical (L, Sfile));
2070 Line_Number_Output := True;
2077 List_Pragmas_Mode := False;
2080 List_Pragmas_Index := List_Pragmas_Index + 1;
2082 -- Normal case (no matching entry in List_Pragmas table)
2085 if Errs or List_Pragmas_Mode then
2090 Empty_Line := False;
2094 -- If we have output a source line, then add the line terminator, with
2095 -- training spaces preserved (so we output the line exactly as input).
2097 if Line_Number_Output then
2101 Write_Eol_Keep_Blanks;
2104 end Output_Source_Line;
2106 -----------------------------
2107 -- Remove_Warning_Messages --
2108 -----------------------------
2110 procedure Remove_Warning_Messages (N : Node_Id) is
2112 function Check_For_Warning (N : Node_Id) return Traverse_Result;
2113 -- This function checks one node for a possible warning message
2115 function Check_All_Warnings is new Traverse_Func (Check_For_Warning);
2116 -- This defines the traversal operation
2118 -----------------------
2119 -- Check_For_Warning --
2120 -----------------------
2122 function Check_For_Warning (N : Node_Id) return Traverse_Result is
2123 Loc : constant Source_Ptr := Sloc (N);
2126 function To_Be_Removed (E : Error_Msg_Id) return Boolean;
2127 -- Returns True for a message that is to be removed. Also adjusts
2128 -- warning count appropriately.
2134 function To_Be_Removed (E : Error_Msg_Id) return Boolean is
2136 if E /= No_Error_Msg
2138 -- Don't remove if location does not match
2140 and then Errors.Table (E).Optr = Loc
2142 -- Don't remove if not warning/info message. Note that we do
2143 -- not remove style messages here. They are warning messages
2144 -- but not ones we want removed in this context.
2146 and then Errors.Table (E).Warn
2148 -- Don't remove unconditional messages
2150 and then not Errors.Table (E).Uncond
2152 Warnings_Detected := Warnings_Detected - 1;
2155 -- No removal required
2162 -- Start of processing for Check_For_Warnings
2165 while To_Be_Removed (First_Error_Msg) loop
2166 First_Error_Msg := Errors.Table (First_Error_Msg).Next;
2169 if First_Error_Msg = No_Error_Msg then
2170 Last_Error_Msg := No_Error_Msg;
2173 E := First_Error_Msg;
2174 while E /= No_Error_Msg loop
2175 while To_Be_Removed (Errors.Table (E).Next) loop
2176 Errors.Table (E).Next :=
2177 Errors.Table (Errors.Table (E).Next).Next;
2179 if Errors.Table (E).Next = No_Error_Msg then
2180 Last_Error_Msg := E;
2184 E := Errors.Table (E).Next;
2187 if Nkind (N) = N_Raise_Constraint_Error
2188 and then Original_Node (N) /= N
2189 and then No (Condition (N))
2191 -- Warnings may have been posted on subexpressions of the original
2192 -- tree. We place the original node back on the tree to remove
2193 -- those warnings, whose sloc do not match those of any node in
2194 -- the current tree. Given that we are in unreachable code, this
2195 -- modification to the tree is harmless.
2198 Status : Traverse_Final_Result;
2201 if Is_List_Member (N) then
2202 Set_Condition (N, Original_Node (N));
2203 Status := Check_All_Warnings (Condition (N));
2205 Rewrite (N, Original_Node (N));
2206 Status := Check_All_Warnings (N);
2215 end Check_For_Warning;
2217 -- Start of processing for Remove_Warning_Messages
2220 if Warnings_Detected /= 0 then
2222 Discard : Traverse_Final_Result;
2223 pragma Warnings (Off, Discard);
2226 Discard := Check_All_Warnings (N);
2229 end Remove_Warning_Messages;
2231 procedure Remove_Warning_Messages (L : List_Id) is
2234 if Is_Non_Empty_List (L) then
2236 while Present (Stat) loop
2237 Remove_Warning_Messages (Stat);
2241 end Remove_Warning_Messages;
2243 ---------------------------
2244 -- Set_Identifier_Casing --
2245 ---------------------------
2247 procedure Set_Identifier_Casing
2248 (Identifier_Name : System.Address;
2249 File_Name : System.Address)
2251 Ident : constant Big_String_Ptr := To_Big_String_Ptr (Identifier_Name);
2252 File : constant Big_String_Ptr := To_Big_String_Ptr (File_Name);
2255 Desired_Case : Casing_Type := Mixed_Case;
2256 -- Casing required for result. Default value of Mixed_Case is used if
2257 -- for some reason we cannot find the right file name in the table.
2260 -- Get length of file name
2263 while File (Flen + 1) /= ASCII.NUL loop
2267 -- Loop through file names to find matching one. This is a bit slow, but
2268 -- we only do it in error situations so it is not so terrible. Note that
2269 -- if the loop does not exit, then the desired case will be left set to
2270 -- Mixed_Case, this can happen if the name was not in canonical form,
2271 -- and gets canonicalized on VMS. Possibly we could fix this by
2272 -- unconditionally canonicalizing these names ???
2274 for J in 1 .. Last_Source_File loop
2275 Get_Name_String (Full_Debug_Name (J));
2278 and then Name_Buffer (1 .. Name_Len) = String (File (1 .. Flen))
2280 Desired_Case := Identifier_Casing (J);
2285 -- Copy identifier as given to Name_Buffer
2287 for J in Name_Buffer'Range loop
2288 Name_Buffer (J) := Ident (J);
2290 if Name_Buffer (J) = ASCII.NUL then
2296 Set_Casing (Desired_Case);
2297 end Set_Identifier_Casing;
2299 -----------------------
2300 -- Set_Ignore_Errors --
2301 -----------------------
2303 procedure Set_Ignore_Errors (To : Boolean) is
2305 Errors_Must_Be_Ignored := To;
2306 end Set_Ignore_Errors;
2308 ------------------------------
2309 -- Set_Msg_Insertion_Column --
2310 ------------------------------
2312 procedure Set_Msg_Insertion_Column is
2314 if RM_Column_Check then
2315 Set_Msg_Str (" in column ");
2316 Set_Msg_Int (Int (Error_Msg_Col) + 1);
2318 end Set_Msg_Insertion_Column;
2320 ----------------------------
2321 -- Set_Msg_Insertion_Node --
2322 ----------------------------
2324 procedure Set_Msg_Insertion_Node is
2329 Error_Msg_Node_1 = Error
2330 or else Error_Msg_Node_1 = Any_Type;
2332 if Error_Msg_Node_1 = Empty then
2333 Set_Msg_Blank_Conditional;
2334 Set_Msg_Str ("<empty>");
2336 elsif Error_Msg_Node_1 = Error then
2338 Set_Msg_Str ("<error>");
2340 elsif Error_Msg_Node_1 = Standard_Void_Type then
2342 Set_Msg_Str ("procedure name");
2344 elsif Nkind (Error_Msg_Node_1) in N_Entity
2345 and then Ekind (Error_Msg_Node_1) = E_Anonymous_Access_Subprogram_Type
2348 Set_Msg_Str ("access to subprogram");
2351 Set_Msg_Blank_Conditional;
2355 K := Nkind (Error_Msg_Node_1);
2357 -- If we have operator case, skip quotes since name of operator
2358 -- itself will supply the required quotations. An operator can be an
2359 -- applied use in an expression or an explicit operator symbol, or an
2360 -- identifier whose name indicates it is an operator.
2363 or else K = N_Operator_Symbol
2364 or else K = N_Defining_Operator_Symbol
2365 or else ((K = N_Identifier or else K = N_Defining_Identifier)
2366 and then Is_Operator_Name (Chars (Error_Msg_Node_1)))
2368 Set_Msg_Node (Error_Msg_Node_1);
2370 -- Normal case, not an operator, surround with quotes
2374 Set_Qualification (Error_Msg_Qual_Level, Error_Msg_Node_1);
2375 Set_Msg_Node (Error_Msg_Node_1);
2380 -- The following assignment ensures that a second ampersand insertion
2381 -- character will correspond to the Error_Msg_Node_2 parameter. We
2382 -- suppress possible validity checks in case operating in -gnatVa mode,
2383 -- and Error_Msg_Node_2 is not needed and has not been set.
2386 pragma Suppress (Range_Check);
2388 Error_Msg_Node_1 := Error_Msg_Node_2;
2390 end Set_Msg_Insertion_Node;
2392 --------------------------------------
2393 -- Set_Msg_Insertion_Type_Reference --
2394 --------------------------------------
2396 procedure Set_Msg_Insertion_Type_Reference (Flag : Source_Ptr) is
2402 if Error_Msg_Node_1 = Standard_Void_Type then
2403 Set_Msg_Str ("package or procedure name");
2406 elsif Error_Msg_Node_1 = Standard_Exception_Type then
2407 Set_Msg_Str ("exception name");
2410 elsif Error_Msg_Node_1 = Any_Access
2411 or else Error_Msg_Node_1 = Any_Array
2412 or else Error_Msg_Node_1 = Any_Boolean
2413 or else Error_Msg_Node_1 = Any_Character
2414 or else Error_Msg_Node_1 = Any_Composite
2415 or else Error_Msg_Node_1 = Any_Discrete
2416 or else Error_Msg_Node_1 = Any_Fixed
2417 or else Error_Msg_Node_1 = Any_Integer
2418 or else Error_Msg_Node_1 = Any_Modular
2419 or else Error_Msg_Node_1 = Any_Numeric
2420 or else Error_Msg_Node_1 = Any_Real
2421 or else Error_Msg_Node_1 = Any_Scalar
2422 or else Error_Msg_Node_1 = Any_String
2424 Get_Unqualified_Decoded_Name_String (Chars (Error_Msg_Node_1));
2425 Set_Msg_Name_Buffer;
2428 elsif Error_Msg_Node_1 = Universal_Real then
2429 Set_Msg_Str ("type universal real");
2432 elsif Error_Msg_Node_1 = Universal_Integer then
2433 Set_Msg_Str ("type universal integer");
2436 elsif Error_Msg_Node_1 = Universal_Fixed then
2437 Set_Msg_Str ("type universal fixed");
2441 -- Special case of anonymous array
2443 if Nkind (Error_Msg_Node_1) in N_Entity
2444 and then Is_Array_Type (Error_Msg_Node_1)
2445 and then Present (Related_Array_Object (Error_Msg_Node_1))
2447 Set_Msg_Str ("type of ");
2448 Set_Msg_Node (Related_Array_Object (Error_Msg_Node_1));
2449 Set_Msg_Str (" declared");
2450 Set_Msg_Insertion_Line_Number
2451 (Sloc (Related_Array_Object (Error_Msg_Node_1)), Flag);
2455 -- If we fall through, it is not a special case, so first output
2456 -- the name of the type, preceded by private for a private type
2458 if Is_Private_Type (Error_Msg_Node_1) then
2459 Set_Msg_Str ("private type ");
2461 Set_Msg_Str ("type ");
2464 Ent := Error_Msg_Node_1;
2466 if Is_Internal_Name (Chars (Ent)) then
2467 Unwind_Internal_Type (Ent);
2470 -- Types in Standard are displayed as "Standard.name"
2472 if Sloc (Ent) <= Standard_Location then
2474 Set_Msg_Str ("Standard.");
2479 -- Types in other language defined units are displayed as
2480 -- "package-name.type-name"
2483 Is_Predefined_File_Name (Unit_File_Name (Get_Source_Unit (Ent)))
2485 Get_Unqualified_Decoded_Name_String
2486 (Unit_Name (Get_Source_Unit (Ent)));
2487 Name_Len := Name_Len - 2;
2488 Set_Msg_Blank_Conditional;
2490 Set_Casing (Mixed_Case);
2491 Set_Msg_Name_Buffer;
2493 Set_Casing (Mixed_Case);
2498 -- All other types display as "type name" defined at line xxx
2499 -- possibly qualified if qualification is requested.
2503 Set_Qualification (Error_Msg_Qual_Level, Ent);
2507 -- If we did not print a name (e.g. in the case of an anonymous
2508 -- subprogram type), there is no name to print, so remove quotes.
2510 if Buffer_Ends_With ('"') then
2511 Buffer_Remove ('"');
2517 -- If the original type did not come from a predefined file, add the
2518 -- location where the type was defined.
2520 if Sloc (Error_Msg_Node_1) > Standard_Location
2522 not Is_Predefined_File_Name
2523 (Unit_File_Name (Get_Source_Unit (Error_Msg_Node_1)))
2525 Set_Msg_Str (" defined");
2526 Set_Msg_Insertion_Line_Number (Sloc (Error_Msg_Node_1), Flag);
2528 -- If it did come from a predefined file, deal with the case where
2529 -- this was a file with a generic instantiation from elsewhere.
2532 if Sloc (Error_Msg_Node_1) > Standard_Location then
2534 Iloc : constant Source_Ptr :=
2535 Instantiation_Location (Sloc (Error_Msg_Node_1));
2538 if Iloc /= No_Location
2539 and then not Suppress_Instance_Location
2541 Set_Msg_Str (" from instance");
2542 Set_Msg_Insertion_Line_Number (Iloc, Flag);
2547 end Set_Msg_Insertion_Type_Reference;
2549 ---------------------------------
2550 -- Set_Msg_Insertion_Unit_Name --
2551 ---------------------------------
2553 procedure Set_Msg_Insertion_Unit_Name (Suffix : Boolean := True) is
2555 if Error_Msg_Unit_1 = No_Unit_Name then
2558 elsif Error_Msg_Unit_1 = Error_Unit_Name then
2560 Set_Msg_Str ("<error>");
2563 Get_Unit_Name_String (Error_Msg_Unit_1, Suffix);
2566 Set_Msg_Name_Buffer;
2570 -- The following assignment ensures that a second percent insertion
2571 -- character will correspond to the Error_Msg_Unit_2 parameter. We
2572 -- suppress possible validity checks in case operating in -gnatVa mode,
2573 -- and Error_Msg_Unit_2 is not needed and has not been set.
2576 pragma Suppress (Range_Check);
2578 Error_Msg_Unit_1 := Error_Msg_Unit_2;
2580 end Set_Msg_Insertion_Unit_Name;
2586 procedure Set_Msg_Node (Node : Node_Id) is
2591 case Nkind (Node) is
2592 when N_Designator =>
2593 Set_Msg_Node (Name (Node));
2595 Set_Msg_Node (Identifier (Node));
2598 when N_Defining_Program_Unit_Name =>
2599 Set_Msg_Node (Name (Node));
2601 Set_Msg_Node (Defining_Identifier (Node));
2604 when N_Selected_Component | N_Expanded_Name =>
2605 Set_Msg_Node (Prefix (Node));
2607 Set_Msg_Node (Selector_Name (Node));
2614 -- The only remaining possibilities are identifiers, defining
2615 -- identifiers, pragmas, and pragma argument associations.
2617 if Nkind (Node) = N_Pragma then
2618 Nam := Pragma_Name (Node);
2620 -- The other cases have Chars fields, and we want to test for possible
2621 -- internal names, which generally represent something gone wrong. An
2622 -- exception is the case of internal type names, where we try to find a
2623 -- reasonable external representation for the external name
2625 elsif Is_Internal_Name (Chars (Node))
2627 ((Is_Entity_Name (Node)
2628 and then Present (Entity (Node))
2629 and then Is_Type (Entity (Node)))
2631 (Nkind (Node) = N_Defining_Identifier and then Is_Type (Node)))
2633 if Nkind (Node) = N_Identifier then
2634 Ent := Entity (Node);
2639 -- If the type is the designated type of an access_to_subprogram,
2640 -- then there is no name to provide in the call.
2642 if Ekind (Ent) = E_Subprogram_Type then
2645 -- Otherwise, we will be able to find some kind of name to output
2648 Unwind_Internal_Type (Ent);
2652 -- If not internal name, just use name in Chars field
2655 Nam := Chars (Node);
2658 -- At this stage, the name to output is in Nam
2660 Get_Unqualified_Decoded_Name_String (Nam);
2662 -- Remove trailing upper case letters from the name (useful for
2663 -- dealing with some cases of internal names.
2665 while Name_Len > 1 and then Name_Buffer (Name_Len) in 'A' .. 'Z' loop
2666 Name_Len := Name_Len - 1;
2669 -- If we have any of the names from standard that start with the
2670 -- characters "any " (e.g. Any_Type), then kill the message since
2671 -- almost certainly it is a junk cascaded message.
2674 and then Name_Buffer (1 .. 4) = "any "
2676 Kill_Message := True;
2679 -- Now we have to set the proper case. If we have a source location
2680 -- then do a check to see if the name in the source is the same name
2681 -- as the name in the Names table, except for possible differences
2682 -- in case, which is the case when we can copy from the source.
2685 Src_Loc : constant Source_Ptr := Sloc (Node);
2686 Sbuffer : Source_Buffer_Ptr;
2688 Src_Ptr : Source_Ptr;
2694 -- For standard locations, always use mixed case
2696 if Src_Loc <= No_Location
2697 or else Sloc (Node) <= No_Location
2699 Set_Casing (Mixed_Case);
2702 -- Determine if the reference we are dealing with corresponds to
2703 -- text at the point of the error reference. This will often be
2704 -- the case for simple identifier references, and is the case
2705 -- where we can copy the spelling from the source.
2707 Sbuffer := Source_Text (Get_Source_File_Index (Src_Loc));
2709 while Ref_Ptr <= Name_Len loop
2711 Fold_Lower (Sbuffer (Src_Ptr)) /=
2712 Fold_Lower (Name_Buffer (Ref_Ptr));
2713 Ref_Ptr := Ref_Ptr + 1;
2714 Src_Ptr := Src_Ptr + 1;
2717 -- If we get through the loop without a mismatch, then output the
2718 -- name the way it is spelled in the source program
2720 if Ref_Ptr > Name_Len then
2723 for J in 1 .. Name_Len loop
2724 Name_Buffer (J) := Sbuffer (Src_Ptr);
2725 Src_Ptr := Src_Ptr + 1;
2728 -- Otherwise set the casing using the default identifier casing
2731 Set_Casing (Identifier_Casing (Flag_Source), Mixed_Case);
2736 Set_Msg_Name_Buffer;
2744 procedure Set_Msg_Text (Text : String; Flag : Source_Ptr) is
2745 C : Character; -- Current character
2746 P : Natural; -- Current index;
2748 procedure Set_Msg_Insertion_Warning (C : Character);
2749 -- Deal with ? ?? ?x? ?X? insertion sequences (also < << <x< <X<). The
2750 -- caller has already bumped the pointer past the initial ? or < and C
2751 -- is set to this initial character (? or <).
2753 -------------------------------
2754 -- Set_Msg_Insertion_Warning --
2755 -------------------------------
2757 procedure Set_Msg_Insertion_Warning (C : Character) is
2759 if P <= Text'Last and then Text (P) = C then
2760 Warning_Msg_Char := '?';
2763 elsif P + 1 <= Text'Last
2764 and then (Text (P) in 'a' .. 'z'
2766 Text (P) in 'A' .. 'Z'
2769 and then Text (P + 1) = C
2771 Warning_Msg_Char := Text (P);
2774 Warning_Msg_Char := ' ';
2776 end Set_Msg_Insertion_Warning;
2778 -- Start of processing for Set_Msg_Text
2781 Manual_Quote_Mode := False;
2783 Flag_Source := Get_Source_File_Index (Flag);
2786 while P <= Text'Last loop
2790 -- Check for insertion character or sequence
2794 if P <= Text'Last and then Text (P) = '%' then
2796 Set_Msg_Insertion_Name_Literal;
2798 Set_Msg_Insertion_Name;
2802 if P <= Text'Last and then Text (P) = '$' then
2804 Set_Msg_Insertion_Unit_Name (Suffix => False);
2806 Set_Msg_Insertion_Unit_Name;
2810 Set_Msg_Insertion_File_Name;
2813 Set_Msg_Insertion_Type_Reference (Flag);
2816 Set_Msg_Insertion_Reserved_Name;
2819 Set_Msg_Insertion_Node;
2822 Set_Msg_Insertion_Line_Number (Error_Msg_Sloc, Flag);
2825 Continuation := True;
2827 if Text (P) = '\' then
2828 Continuation_New_Line := True;
2833 Set_Msg_Insertion_Column;
2836 Set_Msg_Insertion_Run_Time_Name;
2839 Set_Msg_Insertion_Uint;
2842 Manual_Quote_Mode := not Manual_Quote_Mode;
2846 null; -- already dealt with
2849 Set_Msg_Insertion_Warning ('?');
2853 -- Note: the prescan already set Is_Warning_Msg True if and
2854 -- only if Error_Msg_Warn is set to True. If Error_Msg_Warn
2855 -- is False, the call to Set_Msg_Insertion_Warning here does
2856 -- no harm, since Warning_Msg_Char is ignored in that case.
2858 Set_Msg_Insertion_Warning ('<');
2861 null; -- already dealt with
2864 Set_Msg_Char (Text (P));
2868 Set_Msg_Str (Error_Msg_String (1 .. Error_Msg_Strlen));
2870 -- Upper case letter
2874 -- Start of reserved word if two or more
2876 if P <= Text'Last and then Text (P) in 'A' .. 'Z' then
2878 Set_Msg_Insertion_Reserved_Word (Text, P);
2880 -- Single upper case letter is just inserted
2886 -- '[' (will be/would have been raised at run time)
2889 if Is_Warning_Msg then
2890 Set_Msg_Str ("will be raised at run time");
2892 Set_Msg_Str ("would have been raised at run time");
2895 -- ']' (may be/might have been raised at run time)
2898 if Is_Warning_Msg then
2899 Set_Msg_Str ("may be raised at run time");
2901 Set_Msg_Str ("might have been raised at run time");
2904 -- Normal character with no special treatment
2918 procedure Set_Posted (N : Node_Id) is
2922 if Is_Serious_Error then
2924 -- We always set Error_Posted on the node itself
2926 Set_Error_Posted (N);
2928 -- If it is a subexpression, then set Error_Posted on parents up to
2929 -- and including the first non-subexpression construct. This helps
2930 -- avoid cascaded error messages within a single expression.
2936 Set_Error_Posted (P);
2937 exit when Nkind (P) not in N_Subexpr;
2940 -- A special check, if we just posted an error on an attribute
2941 -- definition clause, then also set the entity involved as posted.
2942 -- For example, this stops complaining about the alignment after
2943 -- complaining about the size, which is likely to be useless.
2945 if Nkind (P) = N_Attribute_Definition_Clause then
2946 if Is_Entity_Name (Name (P)) then
2947 Set_Error_Posted (Entity (Name (P)));
2953 -----------------------
2954 -- Set_Qualification --
2955 -----------------------
2957 procedure Set_Qualification (N : Nat; E : Entity_Id) is
2959 if N /= 0 and then Scope (E) /= Standard_Standard then
2960 Set_Qualification (N - 1, Scope (E));
2961 Set_Msg_Node (Scope (E));
2964 end Set_Qualification;
2966 ------------------------
2967 -- Special_Msg_Delete --
2968 ------------------------
2970 -- Is it really right to have all this specialized knowledge in errout?
2972 function Special_Msg_Delete
2974 N : Node_Or_Entity_Id;
2975 E : Node_Or_Entity_Id) return Boolean
2978 -- Never delete messages in -gnatdO mode
2980 if Debug_Flag_OO then
2983 -- Processing for "atomic access cannot be guaranteed"
2985 elsif Msg = "atomic access to & cannot be guaranteed" then
2987 -- When an atomic object refers to a non-atomic type in the same
2988 -- scope, we implicitly make the type atomic. In the non-error case
2989 -- this is surely safe (and in fact prevents an error from occurring
2990 -- if the type is not atomic by default). But if the object cannot be
2991 -- made atomic, then we introduce an extra junk message by this
2992 -- manipulation, which we get rid of here.
2994 -- We identify this case by the fact that it references a type for
2995 -- which Is_Atomic is set, but there is no Atomic pragma setting it.
2998 and then Is_Atomic (E)
2999 and then No (Get_Rep_Pragma (E, Name_Atomic))
3004 -- Processing for "Size too small" messages
3006 elsif Msg = "size for& too small, minimum allowed is ^" then
3008 -- Suppress "size too small" errors in CodePeer mode, since code may
3009 -- be analyzed in a different configuration than the one used for
3010 -- compilation. Even when the configurations match, this message
3011 -- may be issued on correct code, because pragma Pack is ignored
3012 -- in CodePeer mode.
3014 if CodePeer_Mode then
3017 -- When a size is wrong for a frozen type there is no explicit size
3018 -- clause, and other errors have occurred, suppress the message,
3019 -- since it is likely that this size error is a cascaded result of
3020 -- other errors. The reason we eliminate unfrozen types is that
3021 -- messages issued before the freeze type are for sure OK.
3024 and then Serious_Errors_Detected > 0
3025 and then Nkind (N) /= N_Component_Clause
3026 and then Nkind (Parent (N)) /= N_Component_Clause
3028 No (Get_Attribute_Definition_Clause (E, Attribute_Size))
3030 No (Get_Attribute_Definition_Clause (E, Attribute_Object_Size))
3032 No (Get_Attribute_Definition_Clause (E, Attribute_Value_Size))
3038 -- All special tests complete, so go ahead with message
3041 end Special_Msg_Delete;
3043 --------------------------
3044 -- Unwind_Internal_Type --
3045 --------------------------
3047 procedure Unwind_Internal_Type (Ent : in out Entity_Id) is
3048 Derived : Boolean := False;
3050 Old_Ent : Entity_Id;
3053 -- Undo placement of a quote, since we will put it back later
3055 Mchar := Msg_Buffer (Msglen);
3058 Msglen := Msglen - 1;
3061 -- The loop here deals with recursive types, we are trying to find a
3062 -- related entity that is not an implicit type. Note that the check with
3063 -- Old_Ent stops us from getting "stuck". Also, we don't output the
3064 -- "type derived from" message more than once in the case where we climb
3065 -- up multiple levels.
3070 -- Implicit access type, use directly designated type In Ada 2005,
3071 -- the designated type may be an anonymous access to subprogram, in
3072 -- which case we can only point to its definition.
3074 if Is_Access_Type (Ent) then
3075 if Ekind (Ent) = E_Access_Subprogram_Type
3076 or else Ekind (Ent) = E_Anonymous_Access_Subprogram_Type
3077 or else Is_Access_Protected_Subprogram_Type (Ent)
3079 Ent := Directly_Designated_Type (Ent);
3081 if not Comes_From_Source (Ent) then
3082 if Buffer_Ends_With ("type ") then
3083 Buffer_Remove ("type ");
3087 if Ekind (Ent) = E_Function then
3088 Set_Msg_Str ("access to function ");
3089 elsif Ekind (Ent) = E_Procedure then
3090 Set_Msg_Str ("access to procedure ");
3092 Set_Msg_Str ("access to subprogram");
3097 -- Type is access to object, named or anonymous
3100 Set_Msg_Str ("access to ");
3101 Ent := Directly_Designated_Type (Ent);
3106 elsif Is_Class_Wide_Type (Ent) then
3108 Ent := Root_Type (Ent);
3110 -- Use base type if this is a subtype
3112 elsif Ent /= Base_Type (Ent) then
3113 Buffer_Remove ("type ");
3115 -- Avoid duplication "subtype of subtype of", and also replace
3116 -- "derived from subtype of" simply by "derived from"
3118 if not Buffer_Ends_With ("subtype of ")
3119 and then not Buffer_Ends_With ("derived from ")
3121 Set_Msg_Str ("subtype of ");
3124 Ent := Base_Type (Ent);
3126 -- If this is a base type with a first named subtype, use the first
3127 -- named subtype instead. This is not quite accurate in all cases,
3128 -- but it makes too much noise to be accurate and add 'Base in all
3129 -- cases. Note that we only do this is the first named subtype is not
3130 -- itself an internal name. This avoids the obvious loop (subtype ->
3131 -- basetype -> subtype) which would otherwise occur).
3135 FST : constant Entity_Id := First_Subtype (Ent);
3138 if not Is_Internal_Name (Chars (FST)) then
3142 -- Otherwise use root type
3146 Buffer_Remove ("type ");
3148 -- Test for "subtype of type derived from" which seems
3149 -- excessive and is replaced by "type derived from".
3151 Buffer_Remove ("subtype of");
3153 -- Avoid duplicated "type derived from type derived from"
3155 if not Buffer_Ends_With ("type derived from ") then
3156 Set_Msg_Str ("type derived from ");
3167 -- If we are stuck in a loop, get out and settle for the internal
3168 -- name after all. In this case we set to kill the message if it is
3169 -- not the first error message (we really try hard not to show the
3170 -- dirty laundry of the implementation to the poor user).
3172 if Ent = Old_Ent then
3173 Kill_Message := True;
3177 -- Get out if we finally found a non-internal name to use
3179 exit Find when not Is_Internal_Name (Chars (Ent));
3185 end Unwind_Internal_Type;
3191 procedure VMS_Convert is
3201 P := Msg_Buffer'First;
3207 if Msg_Buffer (P) = '-' then
3208 for G in Gnames'Range loop
3209 L := Gnames (G)'Length;
3211 -- See if we have "-ggg switch", where ggg is Gnames entry
3213 if P + L + 7 <= Msglen
3214 and then Msg_Buffer (P + 1 .. P + L) = Gnames (G).all
3215 and then Msg_Buffer (P + L + 1 .. P + L + 7) = " switch"
3217 -- Replace by "/vvv qualifier", where vvv is Vnames entry
3219 N := Vnames (G)'Length;
3220 Msg_Buffer (P + N + 11 .. Msglen + N - L + 3) :=
3221 Msg_Buffer (P + L + 8 .. Msglen);
3222 Msg_Buffer (P) := '/';
3223 Msg_Buffer (P + 1 .. P + N) := Vnames (G).all;
3224 Msg_Buffer (P + N + 1 .. P + N + 10) := " qualifier";
3226 Msglen := Msglen + N - L + 3;