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 =
1014 Errors.Table (Next_Msg).Sfile
1016 exit when Sptr < Errors.Table (Next_Msg).Sptr
1018 (Sptr = Errors.Table (Next_Msg).Sptr
1020 Optr < Errors.Table (Next_Msg).Optr);
1023 Prev_Msg := Next_Msg;
1024 Next_Msg := Errors.Table (Next_Msg).Next;
1028 -- Now we insert the new message in the error chain. The insertion
1029 -- point for the message is after Prev_Msg and before Next_Msg.
1031 -- The possible insertion point for the new message is after Prev_Msg
1032 -- and before Next_Msg. However, this is where we do a special check
1033 -- for redundant parsing messages, defined as messages posted on the
1034 -- same line. The idea here is that probably such messages are junk
1035 -- from the parser recovering. In full errors mode, we don't do this
1036 -- deletion, but otherwise such messages are discarded at this stage.
1038 if Prev_Msg /= No_Error_Msg
1039 and then Errors.Table (Prev_Msg).Line =
1040 Errors.Table (Cur_Msg).Line
1041 and then Errors.Table (Prev_Msg).Sfile =
1042 Errors.Table (Cur_Msg).Sfile
1043 and then Compiler_State = Parsing
1044 and then not All_Errors_Mode
1046 -- Don't delete unconditional messages and at this stage, don't
1047 -- delete continuation lines (we attempted to delete those earlier
1048 -- if the parent message was deleted.
1050 if not Errors.Table (Cur_Msg).Uncond
1051 and then not Continuation
1053 -- Don't delete if prev msg is warning and new msg is an error.
1054 -- This is because we don't want a real error masked by a
1055 -- warning. In all other cases (that is parse errors for the
1056 -- same line that are not unconditional) we do delete the
1057 -- message. This helps to avoid junk extra messages from
1058 -- cascaded parsing errors
1060 if not (Errors.Table (Prev_Msg).Warn
1062 Errors.Table (Prev_Msg).Style)
1064 (Errors.Table (Cur_Msg).Warn
1066 Errors.Table (Cur_Msg).Style)
1068 -- All tests passed, delete the message by simply returning
1069 -- without any further processing.
1071 if not Continuation then
1072 Last_Killed := True;
1080 -- Come here if message is to be inserted in the error chain
1082 if not Continuation then
1083 Last_Killed := False;
1086 if Prev_Msg = No_Error_Msg then
1087 First_Error_Msg := Cur_Msg;
1089 Errors.Table (Prev_Msg).Next := Cur_Msg;
1092 Errors.Table (Cur_Msg).Next := Next_Msg;
1094 if Next_Msg = No_Error_Msg then
1095 Last_Error_Msg := Cur_Msg;
1099 -- Bump appropriate statistics count
1101 if Errors.Table (Cur_Msg).Warn or else Errors.Table (Cur_Msg).Style then
1102 Warnings_Detected := Warnings_Detected + 1;
1105 Total_Errors_Detected := Total_Errors_Detected + 1;
1107 if Errors.Table (Cur_Msg).Serious then
1108 Serious_Errors_Detected := Serious_Errors_Detected + 1;
1109 Handle_Serious_Error;
1113 -- If too many warnings turn off warnings
1115 if Maximum_Messages /= 0 then
1116 if Warnings_Detected = Maximum_Messages then
1117 Warning_Mode := Suppress;
1120 -- If too many errors abandon compilation
1122 if Total_Errors_Detected = Maximum_Messages then
1123 raise Unrecoverable_Error;
1126 end Error_Msg_Internal;
1132 procedure Error_Msg_N (Msg : String; N : Node_Or_Entity_Id) is
1134 Error_Msg_NEL (Msg, N, N, Sloc (N));
1141 procedure Error_Msg_NE
1143 N : Node_Or_Entity_Id;
1144 E : Node_Or_Entity_Id)
1147 Error_Msg_NEL (Msg, N, E, Sloc (N));
1154 procedure Error_Msg_NEL
1156 N : Node_Or_Entity_Id;
1157 E : Node_Or_Entity_Id;
1158 Flag_Location : Source_Ptr)
1161 if Special_Msg_Delete (Msg, N, E) then
1165 Test_Style_Warning_Serious_Unconditional_Msg (Msg);
1167 -- Special handling for warning messages
1169 if Is_Warning_Msg then
1171 -- Suppress if no warnings set for either entity or node
1173 if No_Warnings (N) or else No_Warnings (E) then
1175 -- Disable any continuation messages as well
1177 Last_Killed := True;
1181 -- Suppress if inside loop that is known to be null or is probably
1182 -- null (case where loop executes only if invalid values present).
1183 -- In either case warnings in the loop are likely to be junk.
1190 while Present (P) loop
1191 if Nkind (P) = N_Loop_Statement
1192 and then Suppress_Loop_Warnings (P)
1202 -- Test for message to be output
1205 or else Is_Unconditional_Msg
1206 or else Is_Warning_Msg
1208 or else (Msg (Msg'First) = '\' and then not Last_Killed)
1211 Error_Msg_Node_1 := E;
1212 Error_Msg (Msg, Flag_Location);
1215 Last_Killed := True;
1218 if not (Is_Warning_Msg or Is_Style_Msg) then
1227 procedure Error_Msg_NW
1230 N : Node_Or_Entity_Id)
1234 and then In_Extended_Main_Source_Unit (N)
1235 and then Comes_From_Source (N)
1237 Error_Msg_NEL (Msg, N, N, Sloc (N));
1245 procedure Error_Msg_S (Msg : String) is
1247 Error_Msg (Msg, Scan_Ptr);
1254 procedure Error_Msg_SC (Msg : String) is
1256 -- If we are at end of file, post the flag after the previous token
1258 if Token = Tok_EOF then
1261 -- For all other cases the message is posted at the current token
1265 Error_Msg (Msg, Token_Ptr);
1273 procedure Error_Msg_SP (Msg : String) is
1275 -- Note: in the case where there is no previous token, Prev_Token_Ptr
1276 -- is set to Source_First, which is a reasonable position for the
1277 -- error flag in this situation
1279 Error_Msg (Msg, Prev_Token_Ptr);
1286 procedure Finalize (Last_Call : Boolean) is
1291 procedure Delete_Warning (E : Error_Msg_Id);
1292 -- Delete a message if not already deleted and adjust warning count
1294 --------------------
1295 -- Delete_Warning --
1296 --------------------
1298 procedure Delete_Warning (E : Error_Msg_Id) is
1300 if not Errors.Table (E).Deleted then
1301 Errors.Table (E).Deleted := True;
1302 Warnings_Detected := Warnings_Detected - 1;
1306 -- Start of message for Finalize
1309 -- Set Prev pointers
1311 Cur := First_Error_Msg;
1312 while Cur /= No_Error_Msg loop
1313 Nxt := Errors.Table (Cur).Next;
1314 exit when Nxt = No_Error_Msg;
1315 Errors.Table (Nxt).Prev := Cur;
1319 -- Eliminate any duplicated error messages from the list. This is
1320 -- done after the fact to avoid problems with Change_Error_Text.
1322 Cur := First_Error_Msg;
1323 while Cur /= No_Error_Msg loop
1324 Nxt := Errors.Table (Cur).Next;
1327 while F /= No_Error_Msg
1328 and then Errors.Table (F).Sptr = Errors.Table (Cur).Sptr
1330 Check_Duplicate_Message (Cur, F);
1331 F := Errors.Table (F).Next;
1337 -- Mark any messages suppressed by specific warnings as Deleted
1339 Cur := First_Error_Msg;
1340 while Cur /= No_Error_Msg loop
1342 CE : Error_Msg_Object renames Errors.Table (Cur);
1345 if (CE.Warn and not CE.Deleted)
1346 and then (Warning_Specifically_Suppressed (CE.Sptr, CE.Text) /=
1349 Warning_Specifically_Suppressed (CE.Optr, CE.Text) /=
1352 Delete_Warning (Cur);
1354 -- If this is a continuation, delete previous messages
1357 while Errors.Table (F).Msg_Cont loop
1358 F := Errors.Table (F).Prev;
1362 -- Delete any following continuations
1366 F := Errors.Table (F).Next;
1367 exit when F = No_Error_Msg;
1368 exit when not Errors.Table (F).Msg_Cont;
1374 Cur := Errors.Table (Cur).Next;
1377 Finalize_Called := True;
1379 -- Check consistency of specific warnings (may add warnings). We only
1380 -- do this on the last call, after all possible warnings are posted.
1383 Validate_Specific_Warnings (Error_Msg'Access);
1391 function First_Node (C : Node_Id) return Node_Id is
1392 Orig : constant Node_Id := Original_Node (C);
1393 Loc : constant Source_Ptr := Sloc (Orig);
1394 Sfile : constant Source_File_Index := Get_Source_File_Index (Loc);
1398 function Test_Earlier (N : Node_Id) return Traverse_Result;
1399 -- Function applied to every node in the construct
1401 procedure Search_Tree_First is new Traverse_Proc (Test_Earlier);
1402 -- Create traversal procedure
1408 function Test_Earlier (N : Node_Id) return Traverse_Result is
1409 Norig : constant Node_Id := Original_Node (N);
1410 Loc : constant Source_Ptr := Sloc (Norig);
1413 -- Check for earlier
1417 -- Ignore nodes with no useful location information
1419 and then Loc /= Standard_Location
1420 and then Loc /= No_Location
1422 -- Ignore nodes from a different file. This ensures against cases
1423 -- of strange foreign code somehow being present. We don't want
1424 -- wild placement of messages if that happens.
1426 and then Get_Source_File_Index (Loc) = Sfile
1435 -- Start of processing for First_Node
1438 if Nkind (Orig) in N_Subexpr then
1441 Search_Tree_First (Orig);
1453 function First_Sloc (N : Node_Id) return Source_Ptr is
1454 SI : constant Source_File_Index := Source_Index (Get_Source_Unit (N));
1455 SF : constant Source_Ptr := Source_First (SI);
1460 F := First_Node (N);
1463 -- The following circuit is a bit subtle. When we have parenthesized
1464 -- expressions, then the Sloc will not record the location of the paren,
1465 -- but we would like to post the flag on the paren. So what we do is to
1466 -- crawl up the tree from the First_Node, adjusting the Sloc value for
1467 -- any parentheses we know are present. Yes, we know this circuit is not
1468 -- 100% reliable (e.g. because we don't record all possible paren level
1469 -- values), but this is only for an error message so it is good enough.
1472 Paren_Loop : for J in 1 .. Paren_Count (F) loop
1474 -- We don't look more than 12 characters behind the current
1475 -- location, and in any case not past the front of the source.
1477 Search_Loop : for K in 1 .. 12 loop
1478 exit Search_Loop when S = SF;
1480 if Source_Text (SI) (S - 1) = '(' then
1484 elsif Source_Text (SI) (S - 1) <= ' ' then
1490 end loop Search_Loop;
1491 end loop Paren_Loop;
1493 exit Node_Loop when F = N;
1495 exit Node_Loop when Nkind (F) not in N_Subexpr;
1501 -----------------------
1502 -- Get_Ignore_Errors --
1503 -----------------------
1505 function Get_Ignore_Errors return Boolean is
1507 return Errors_Must_Be_Ignored;
1508 end Get_Ignore_Errors;
1514 procedure Initialize is
1517 First_Error_Msg := No_Error_Msg;
1518 Last_Error_Msg := No_Error_Msg;
1519 Serious_Errors_Detected := 0;
1520 Total_Errors_Detected := 0;
1521 Warnings_Treated_As_Errors := 0;
1522 Warnings_Detected := 0;
1523 Warnings_As_Errors_Count := 0;
1524 Cur_Msg := No_Error_Msg;
1527 -- Initialize warnings tables
1530 Specific_Warnings.Init;
1537 function No_Warnings (N : Node_Or_Entity_Id) return Boolean is
1539 if Error_Posted (N) then
1542 elsif Nkind (N) in N_Entity and then Has_Warnings_Off (N) then
1545 elsif Is_Entity_Name (N)
1546 and then Present (Entity (N))
1547 and then Has_Warnings_Off (Entity (N))
1560 function OK_Node (N : Node_Id) return Boolean is
1561 K : constant Node_Kind := Nkind (N);
1564 if Error_Posted (N) then
1567 elsif K in N_Has_Etype
1568 and then Present (Etype (N))
1569 and then Error_Posted (Etype (N))
1574 or else K = N_Attribute_Reference
1575 or else K = N_Character_Literal
1576 or else K = N_Expanded_Name
1577 or else K = N_Identifier
1578 or else K = N_Operator_Symbol)
1579 and then Present (Entity (N))
1580 and then Error_Posted (Entity (N))
1588 ---------------------
1589 -- Output_Messages --
1590 ---------------------
1592 procedure Output_Messages is
1596 procedure Write_Error_Summary;
1597 -- Write error summary
1599 procedure Write_Header (Sfile : Source_File_Index);
1600 -- Write header line (compiling or checking given file)
1602 procedure Write_Max_Errors;
1603 -- Write message if max errors reached
1605 -------------------------
1606 -- Write_Error_Summary --
1607 -------------------------
1609 procedure Write_Error_Summary is
1611 -- Extra blank line if error messages or source listing were output
1613 if Total_Errors_Detected + Warnings_Detected > 0
1619 -- Message giving number of lines read and number of errors detected.
1620 -- This normally goes to Standard_Output. The exception is when brief
1621 -- mode is not set, verbose mode (or full list mode) is set, and
1622 -- there are errors. In this case we send the message to standard
1623 -- error to make sure that *something* appears on standard error in
1624 -- an error situation.
1626 -- Formerly, only the "# errors" suffix was sent to stderr, whereas
1627 -- "# lines:" appeared on stdout. This caused problems on VMS when
1628 -- the stdout buffer was flushed, giving an extra line feed after
1631 if Total_Errors_Detected + Warnings_Detected /= 0
1632 and then not Brief_Output
1633 and then (Verbose_Mode or Full_List)
1638 -- Message giving total number of lines. Don't give this message if
1639 -- the Main_Source line is unknown (this happens in error situations,
1640 -- e.g. when integrated preprocessing fails).
1642 if Main_Source_File /= No_Source_File then
1644 Write_Int (Num_Source_Lines (Main_Source_File));
1646 if Num_Source_Lines (Main_Source_File) = 1 then
1647 Write_Str (" line: ");
1649 Write_Str (" lines: ");
1653 if Total_Errors_Detected = 0 then
1654 Write_Str ("No errors");
1656 elsif Total_Errors_Detected = 1 then
1657 Write_Str ("1 error");
1660 Write_Int (Total_Errors_Detected);
1661 Write_Str (" errors");
1664 if Warnings_Detected /= 0 then
1666 Write_Int (Warnings_Detected);
1667 Write_Str (" warning");
1669 if Warnings_Detected /= 1 then
1673 if Warning_Mode = Treat_As_Error then
1674 Write_Str (" (treated as error");
1676 if Warnings_Detected /= 1 then
1682 elsif Warnings_Treated_As_Errors /= 0 then
1684 Write_Int (Warnings_Treated_As_Errors);
1685 Write_Str (" treated as errors)");
1690 Set_Standard_Output;
1691 end Write_Error_Summary;
1697 procedure Write_Header (Sfile : Source_File_Index) is
1699 if Verbose_Mode or Full_List then
1700 if Original_Operating_Mode = Generate_Code then
1701 Write_Str ("Compiling: ");
1703 Write_Str ("Checking: ");
1706 Write_Name (Full_File_Name (Sfile));
1708 if not Debug_Flag_7 then
1709 Write_Str (" (source file time stamp: ");
1710 Write_Time_Stamp (Sfile);
1718 ----------------------
1719 -- Write_Max_Errors --
1720 ----------------------
1722 procedure Write_Max_Errors is
1724 if Maximum_Messages /= 0 then
1725 if Warnings_Detected >= Maximum_Messages then
1727 Write_Line ("maximum number of warnings output");
1728 Write_Line ("any further warnings suppressed");
1729 Set_Standard_Output;
1732 -- If too many errors print message
1734 if Total_Errors_Detected >= Maximum_Messages then
1736 Write_Line ("fatal error: maximum number of errors detected");
1737 Set_Standard_Output;
1740 end Write_Max_Errors;
1742 -- Start of processing for Output_Messages
1745 -- Error if Finalize has not been called
1747 if not Finalize_Called then
1748 raise Program_Error;
1751 -- Reset current error source file if the main unit has a pragma
1752 -- Source_Reference. This ensures outputting the proper name of
1753 -- the source file in this situation.
1755 if Main_Source_File = No_Source_File
1756 or else Num_SRef_Pragmas (Main_Source_File) /= 0
1758 Current_Error_Source_File := No_Source_File;
1763 if Brief_Output or (not Full_List and not Verbose_Mode) then
1766 E := First_Error_Msg;
1767 while E /= No_Error_Msg loop
1768 if not Errors.Table (E).Deleted and then not Debug_Flag_KK then
1769 if Full_Path_Name_For_Brief_Errors then
1770 Write_Name (Full_Ref_Name (Errors.Table (E).Sfile));
1772 Write_Name (Reference_Name (Errors.Table (E).Sfile));
1776 Write_Int (Int (Physical_To_Logical
1777 (Errors.Table (E).Line,
1778 Errors.Table (E).Sfile)));
1781 if Errors.Table (E).Col < 10 then
1785 Write_Int (Int (Errors.Table (E).Col));
1787 Output_Msg_Text (E);
1791 E := Errors.Table (E).Next;
1794 Set_Standard_Output;
1797 -- Full source listing case
1800 List_Pragmas_Index := 1;
1801 List_Pragmas_Mode := True;
1802 E := First_Error_Msg;
1804 -- Normal case, to stdout (copyright notice already output)
1806 if Full_List_File_Name = null then
1807 if not Debug_Flag_7 then
1814 Create_List_File_Access.all (Full_List_File_Name.all);
1815 Set_Special_Output (Write_List_Info_Access.all'Access);
1817 -- Write copyright notice to file
1819 if not Debug_Flag_7 then
1820 Write_Str ("GNAT ");
1821 Write_Str (Gnat_Version_String);
1823 Write_Str ("Copyright 1992-" &
1825 ", Free Software Foundation, Inc.");
1830 -- First list extended main source file units with errors
1832 for U in Main_Unit .. Last_Unit loop
1833 if In_Extended_Main_Source_Unit (Cunit_Entity (U))
1835 -- If debug flag d.m is set, only the main source is listed
1837 and then (U = Main_Unit or else not Debug_Flag_Dot_M)
1839 -- If the unit of the entity does not come from source, it is
1840 -- an implicit subprogram declaration for a child subprogram.
1841 -- Do not emit errors for it, they are listed with the body.
1844 (No (Cunit_Entity (U))
1845 or else Comes_From_Source (Cunit_Entity (U))
1846 or else not Is_Subprogram (Cunit_Entity (U)))
1849 Sfile : constant Source_File_Index := Source_Index (U);
1854 -- Only write the header if Sfile is known
1856 if Sfile /= No_Source_File then
1857 Write_Header (Sfile);
1861 -- Normally, we don't want an "error messages from file"
1862 -- message when listing the entire file, so we set the
1863 -- current source file as the current error source file.
1864 -- However, the old style of doing things was to list this
1865 -- message if pragma Source_Reference is present, even for
1866 -- the main unit. Since the purpose of the -gnatd.m switch
1867 -- is to duplicate the old behavior, we skip the reset if
1868 -- this debug flag is set.
1870 if not Debug_Flag_Dot_M then
1871 Current_Error_Source_File := Sfile;
1874 -- Only output the listing if Sfile is known, to avoid
1875 -- crashing the compiler.
1877 if Sfile /= No_Source_File then
1878 for N in 1 .. Last_Source_Line (Sfile) loop
1879 while E /= No_Error_Msg
1880 and then Errors.Table (E).Deleted
1882 E := Errors.Table (E).Next;
1887 and then Errors.Table (E).Line = N
1888 and then Errors.Table (E).Sfile = Sfile;
1890 Output_Source_Line (N, Sfile, Err_Flag);
1893 Output_Error_Msgs (E);
1895 if not Debug_Flag_2 then
1905 -- Then output errors, if any, for subsidiary units not in the
1906 -- main extended unit.
1908 -- Note: if debug flag d.m set, include errors for any units other
1909 -- than the main unit in the extended source unit (e.g. spec and
1910 -- subunits for a body).
1912 while E /= No_Error_Msg
1913 and then (not In_Extended_Main_Source_Unit (Errors.Table (E).Sptr)
1916 and then Get_Source_Unit
1917 (Errors.Table (E).Sptr) /= Main_Unit))
1919 if Errors.Table (E).Deleted then
1920 E := Errors.Table (E).Next;
1925 (Errors.Table (E).Line, Errors.Table (E).Sfile, True);
1926 Output_Error_Msgs (E);
1930 -- If output to file, write extra copy of error summary to the
1931 -- output file, and then close it.
1933 if Full_List_File_Name /= null then
1934 Write_Error_Summary;
1936 Close_List_File_Access.all;
1937 Cancel_Special_Output;
1941 -- Verbose mode (error lines only with error flags). Normally this is
1942 -- ignored in full list mode, unless we are listing to a file, in which
1943 -- case we still generate -gnatv output to standard output.
1946 and then (not Full_List or else Full_List_File_Name /= null)
1950 -- Output the header only when Main_Source_File is known
1952 if Main_Source_File /= No_Source_File then
1953 Write_Header (Main_Source_File);
1956 E := First_Error_Msg;
1958 -- Loop through error lines
1960 while E /= No_Error_Msg loop
1961 if Errors.Table (E).Deleted then
1962 E := Errors.Table (E).Next;
1966 (Errors.Table (E).Line, Errors.Table (E).Sfile, True);
1967 Output_Error_Msgs (E);
1972 -- Output error summary if verbose or full list mode
1974 if Verbose_Mode or else Full_List then
1975 Write_Error_Summary;
1980 if Warning_Mode = Treat_As_Error then
1981 Total_Errors_Detected := Total_Errors_Detected + Warnings_Detected;
1982 Warnings_Detected := 0;
1984 end Output_Messages;
1986 ------------------------
1987 -- Output_Source_Line --
1988 ------------------------
1990 procedure Output_Source_Line
1991 (L : Physical_Line_Number;
1992 Sfile : Source_File_Index;
1998 Line_Number_Output : Boolean := False;
1999 -- Set True once line number is output
2001 Empty_Line : Boolean := True;
2002 -- Set False if line includes at least one character
2005 if Sfile /= Current_Error_Source_File then
2006 Write_Str ("==============Error messages for ");
2008 case Sinput.File_Type (Sfile) is
2010 Write_Str ("source");
2012 when Sinput.Config =>
2013 Write_Str ("configuration pragmas");
2016 Write_Str ("symbol definition");
2018 when Sinput.Preproc =>
2019 Write_Str ("preprocessing data");
2022 Write_Str (" file: ");
2023 Write_Name (Full_File_Name (Sfile));
2026 if Num_SRef_Pragmas (Sfile) > 0 then
2027 Write_Str ("--------------Line numbers from file: ");
2028 Write_Name (Full_Ref_Name (Sfile));
2029 Write_Str (" (starting at line ");
2030 Write_Int (Int (First_Mapped_Line (Sfile)));
2035 Current_Error_Source_File := Sfile;
2038 if Errs or List_Pragmas_Mode then
2039 Output_Line_Number (Physical_To_Logical (L, Sfile));
2040 Line_Number_Output := True;
2043 S := Line_Start (L, Sfile);
2046 C := Source_Text (Sfile) (S);
2047 exit when C = ASCII.LF or else C = ASCII.CR or else C = EOF;
2049 -- Deal with matching entry in List_Pragmas table
2052 and then List_Pragmas_Index <= List_Pragmas.Last
2053 and then S = List_Pragmas.Table (List_Pragmas_Index).Ploc
2055 case List_Pragmas.Table (List_Pragmas_Index).Ptyp is
2059 -- Ignore if on line with errors so that error flags
2060 -- get properly listed with the error line .
2063 Write_Char (ASCII.FF);
2067 List_Pragmas_Mode := True;
2069 if not Line_Number_Output then
2070 Output_Line_Number (Physical_To_Logical (L, Sfile));
2071 Line_Number_Output := True;
2078 List_Pragmas_Mode := False;
2081 List_Pragmas_Index := List_Pragmas_Index + 1;
2083 -- Normal case (no matching entry in List_Pragmas table)
2086 if Errs or List_Pragmas_Mode then
2091 Empty_Line := False;
2095 -- If we have output a source line, then add the line terminator, with
2096 -- training spaces preserved (so we output the line exactly as input).
2098 if Line_Number_Output then
2102 Write_Eol_Keep_Blanks;
2105 end Output_Source_Line;
2107 -----------------------------
2108 -- Remove_Warning_Messages --
2109 -----------------------------
2111 procedure Remove_Warning_Messages (N : Node_Id) is
2113 function Check_For_Warning (N : Node_Id) return Traverse_Result;
2114 -- This function checks one node for a possible warning message
2116 function Check_All_Warnings is new Traverse_Func (Check_For_Warning);
2117 -- This defines the traversal operation
2119 -----------------------
2120 -- Check_For_Warning --
2121 -----------------------
2123 function Check_For_Warning (N : Node_Id) return Traverse_Result is
2124 Loc : constant Source_Ptr := Sloc (N);
2127 function To_Be_Removed (E : Error_Msg_Id) return Boolean;
2128 -- Returns True for a message that is to be removed. Also adjusts
2129 -- warning count appropriately.
2135 function To_Be_Removed (E : Error_Msg_Id) return Boolean is
2137 if E /= No_Error_Msg
2139 -- Don't remove if location does not match
2141 and then Errors.Table (E).Optr = Loc
2143 -- Don't remove if not warning/info message. Note that we do
2144 -- not remove style messages here. They are warning messages
2145 -- but not ones we want removed in this context.
2147 and then Errors.Table (E).Warn
2149 -- Don't remove unconditional messages
2151 and then not Errors.Table (E).Uncond
2153 Warnings_Detected := Warnings_Detected - 1;
2156 -- No removal required
2163 -- Start of processing for Check_For_Warnings
2166 while To_Be_Removed (First_Error_Msg) loop
2167 First_Error_Msg := Errors.Table (First_Error_Msg).Next;
2170 if First_Error_Msg = No_Error_Msg then
2171 Last_Error_Msg := No_Error_Msg;
2174 E := First_Error_Msg;
2175 while E /= No_Error_Msg loop
2176 while To_Be_Removed (Errors.Table (E).Next) loop
2177 Errors.Table (E).Next :=
2178 Errors.Table (Errors.Table (E).Next).Next;
2180 if Errors.Table (E).Next = No_Error_Msg then
2181 Last_Error_Msg := E;
2185 E := Errors.Table (E).Next;
2188 if Nkind (N) = N_Raise_Constraint_Error
2189 and then Original_Node (N) /= N
2190 and then No (Condition (N))
2192 -- Warnings may have been posted on subexpressions of the original
2193 -- tree. We place the original node back on the tree to remove
2194 -- those warnings, whose sloc do not match those of any node in
2195 -- the current tree. Given that we are in unreachable code, this
2196 -- modification to the tree is harmless.
2199 Status : Traverse_Final_Result;
2202 if Is_List_Member (N) then
2203 Set_Condition (N, Original_Node (N));
2204 Status := Check_All_Warnings (Condition (N));
2206 Rewrite (N, Original_Node (N));
2207 Status := Check_All_Warnings (N);
2216 end Check_For_Warning;
2218 -- Start of processing for Remove_Warning_Messages
2221 if Warnings_Detected /= 0 then
2223 Discard : Traverse_Final_Result;
2224 pragma Warnings (Off, Discard);
2227 Discard := Check_All_Warnings (N);
2230 end Remove_Warning_Messages;
2232 procedure Remove_Warning_Messages (L : List_Id) is
2235 if Is_Non_Empty_List (L) then
2237 while Present (Stat) loop
2238 Remove_Warning_Messages (Stat);
2242 end Remove_Warning_Messages;
2244 ---------------------------
2245 -- Set_Identifier_Casing --
2246 ---------------------------
2248 procedure Set_Identifier_Casing
2249 (Identifier_Name : System.Address;
2250 File_Name : System.Address)
2252 Ident : constant Big_String_Ptr := To_Big_String_Ptr (Identifier_Name);
2253 File : constant Big_String_Ptr := To_Big_String_Ptr (File_Name);
2256 Desired_Case : Casing_Type := Mixed_Case;
2257 -- Casing required for result. Default value of Mixed_Case is used if
2258 -- for some reason we cannot find the right file name in the table.
2261 -- Get length of file name
2264 while File (Flen + 1) /= ASCII.NUL loop
2268 -- Loop through file names to find matching one. This is a bit slow, but
2269 -- we only do it in error situations so it is not so terrible. Note that
2270 -- if the loop does not exit, then the desired case will be left set to
2271 -- Mixed_Case, this can happen if the name was not in canonical form,
2272 -- and gets canonicalized on VMS. Possibly we could fix this by
2273 -- unconditionally canonicalizing these names ???
2275 for J in 1 .. Last_Source_File loop
2276 Get_Name_String (Full_Debug_Name (J));
2279 and then Name_Buffer (1 .. Name_Len) = String (File (1 .. Flen))
2281 Desired_Case := Identifier_Casing (J);
2286 -- Copy identifier as given to Name_Buffer
2288 for J in Name_Buffer'Range loop
2289 Name_Buffer (J) := Ident (J);
2291 if Name_Buffer (J) = ASCII.NUL then
2297 Set_Casing (Desired_Case);
2298 end Set_Identifier_Casing;
2300 -----------------------
2301 -- Set_Ignore_Errors --
2302 -----------------------
2304 procedure Set_Ignore_Errors (To : Boolean) is
2306 Errors_Must_Be_Ignored := To;
2307 end Set_Ignore_Errors;
2309 ------------------------------
2310 -- Set_Msg_Insertion_Column --
2311 ------------------------------
2313 procedure Set_Msg_Insertion_Column is
2315 if RM_Column_Check then
2316 Set_Msg_Str (" in column ");
2317 Set_Msg_Int (Int (Error_Msg_Col) + 1);
2319 end Set_Msg_Insertion_Column;
2321 ----------------------------
2322 -- Set_Msg_Insertion_Node --
2323 ----------------------------
2325 procedure Set_Msg_Insertion_Node is
2330 Error_Msg_Node_1 = Error
2331 or else Error_Msg_Node_1 = Any_Type;
2333 if Error_Msg_Node_1 = Empty then
2334 Set_Msg_Blank_Conditional;
2335 Set_Msg_Str ("<empty>");
2337 elsif Error_Msg_Node_1 = Error then
2339 Set_Msg_Str ("<error>");
2341 elsif Error_Msg_Node_1 = Standard_Void_Type then
2343 Set_Msg_Str ("procedure name");
2345 elsif Nkind (Error_Msg_Node_1) in N_Entity
2346 and then Ekind (Error_Msg_Node_1) = E_Anonymous_Access_Subprogram_Type
2349 Set_Msg_Str ("access to subprogram");
2352 Set_Msg_Blank_Conditional;
2356 K := Nkind (Error_Msg_Node_1);
2358 -- If we have operator case, skip quotes since name of operator
2359 -- itself will supply the required quotations. An operator can be an
2360 -- applied use in an expression or an explicit operator symbol, or an
2361 -- identifier whose name indicates it is an operator.
2364 or else K = N_Operator_Symbol
2365 or else K = N_Defining_Operator_Symbol
2366 or else ((K = N_Identifier or else K = N_Defining_Identifier)
2367 and then Is_Operator_Name (Chars (Error_Msg_Node_1)))
2369 Set_Msg_Node (Error_Msg_Node_1);
2371 -- Normal case, not an operator, surround with quotes
2375 Set_Qualification (Error_Msg_Qual_Level, Error_Msg_Node_1);
2376 Set_Msg_Node (Error_Msg_Node_1);
2381 -- The following assignment ensures that a second ampersand insertion
2382 -- character will correspond to the Error_Msg_Node_2 parameter. We
2383 -- suppress possible validity checks in case operating in -gnatVa mode,
2384 -- and Error_Msg_Node_2 is not needed and has not been set.
2387 pragma Suppress (Range_Check);
2389 Error_Msg_Node_1 := Error_Msg_Node_2;
2391 end Set_Msg_Insertion_Node;
2393 --------------------------------------
2394 -- Set_Msg_Insertion_Type_Reference --
2395 --------------------------------------
2397 procedure Set_Msg_Insertion_Type_Reference (Flag : Source_Ptr) is
2403 if Error_Msg_Node_1 = Standard_Void_Type then
2404 Set_Msg_Str ("package or procedure name");
2407 elsif Error_Msg_Node_1 = Standard_Exception_Type then
2408 Set_Msg_Str ("exception name");
2411 elsif Error_Msg_Node_1 = Any_Access
2412 or else Error_Msg_Node_1 = Any_Array
2413 or else Error_Msg_Node_1 = Any_Boolean
2414 or else Error_Msg_Node_1 = Any_Character
2415 or else Error_Msg_Node_1 = Any_Composite
2416 or else Error_Msg_Node_1 = Any_Discrete
2417 or else Error_Msg_Node_1 = Any_Fixed
2418 or else Error_Msg_Node_1 = Any_Integer
2419 or else Error_Msg_Node_1 = Any_Modular
2420 or else Error_Msg_Node_1 = Any_Numeric
2421 or else Error_Msg_Node_1 = Any_Real
2422 or else Error_Msg_Node_1 = Any_Scalar
2423 or else Error_Msg_Node_1 = Any_String
2425 Get_Unqualified_Decoded_Name_String (Chars (Error_Msg_Node_1));
2426 Set_Msg_Name_Buffer;
2429 elsif Error_Msg_Node_1 = Universal_Real then
2430 Set_Msg_Str ("type universal real");
2433 elsif Error_Msg_Node_1 = Universal_Integer then
2434 Set_Msg_Str ("type universal integer");
2437 elsif Error_Msg_Node_1 = Universal_Fixed then
2438 Set_Msg_Str ("type universal fixed");
2442 -- Special case of anonymous array
2444 if Nkind (Error_Msg_Node_1) in N_Entity
2445 and then Is_Array_Type (Error_Msg_Node_1)
2446 and then Present (Related_Array_Object (Error_Msg_Node_1))
2448 Set_Msg_Str ("type of ");
2449 Set_Msg_Node (Related_Array_Object (Error_Msg_Node_1));
2450 Set_Msg_Str (" declared");
2451 Set_Msg_Insertion_Line_Number
2452 (Sloc (Related_Array_Object (Error_Msg_Node_1)), Flag);
2456 -- If we fall through, it is not a special case, so first output
2457 -- the name of the type, preceded by private for a private type
2459 if Is_Private_Type (Error_Msg_Node_1) then
2460 Set_Msg_Str ("private type ");
2462 Set_Msg_Str ("type ");
2465 Ent := Error_Msg_Node_1;
2467 if Is_Internal_Name (Chars (Ent)) then
2468 Unwind_Internal_Type (Ent);
2471 -- Types in Standard are displayed as "Standard.name"
2473 if Sloc (Ent) <= Standard_Location then
2475 Set_Msg_Str ("Standard.");
2480 -- Types in other language defined units are displayed as
2481 -- "package-name.type-name"
2484 Is_Predefined_File_Name (Unit_File_Name (Get_Source_Unit (Ent)))
2486 Get_Unqualified_Decoded_Name_String
2487 (Unit_Name (Get_Source_Unit (Ent)));
2488 Name_Len := Name_Len - 2;
2489 Set_Msg_Blank_Conditional;
2491 Set_Casing (Mixed_Case);
2492 Set_Msg_Name_Buffer;
2494 Set_Casing (Mixed_Case);
2499 -- All other types display as "type name" defined at line xxx
2500 -- possibly qualified if qualification is requested.
2504 Set_Qualification (Error_Msg_Qual_Level, Ent);
2508 -- If we did not print a name (e.g. in the case of an anonymous
2509 -- subprogram type), there is no name to print, so remove quotes.
2511 if Buffer_Ends_With ('"') then
2512 Buffer_Remove ('"');
2518 -- If the original type did not come from a predefined file, add the
2519 -- location where the type was defined.
2521 if Sloc (Error_Msg_Node_1) > Standard_Location
2523 not Is_Predefined_File_Name
2524 (Unit_File_Name (Get_Source_Unit (Error_Msg_Node_1)))
2526 Set_Msg_Str (" defined");
2527 Set_Msg_Insertion_Line_Number (Sloc (Error_Msg_Node_1), Flag);
2529 -- If it did come from a predefined file, deal with the case where
2530 -- this was a file with a generic instantiation from elsewhere.
2533 if Sloc (Error_Msg_Node_1) > Standard_Location then
2535 Iloc : constant Source_Ptr :=
2536 Instantiation_Location (Sloc (Error_Msg_Node_1));
2539 if Iloc /= No_Location
2540 and then not Suppress_Instance_Location
2542 Set_Msg_Str (" from instance");
2543 Set_Msg_Insertion_Line_Number (Iloc, Flag);
2548 end Set_Msg_Insertion_Type_Reference;
2550 ---------------------------------
2551 -- Set_Msg_Insertion_Unit_Name --
2552 ---------------------------------
2554 procedure Set_Msg_Insertion_Unit_Name (Suffix : Boolean := True) is
2556 if Error_Msg_Unit_1 = No_Unit_Name then
2559 elsif Error_Msg_Unit_1 = Error_Unit_Name then
2561 Set_Msg_Str ("<error>");
2564 Get_Unit_Name_String (Error_Msg_Unit_1, Suffix);
2567 Set_Msg_Name_Buffer;
2571 -- The following assignment ensures that a second percent insertion
2572 -- character will correspond to the Error_Msg_Unit_2 parameter. We
2573 -- suppress possible validity checks in case operating in -gnatVa mode,
2574 -- and Error_Msg_Unit_2 is not needed and has not been set.
2577 pragma Suppress (Range_Check);
2579 Error_Msg_Unit_1 := Error_Msg_Unit_2;
2581 end Set_Msg_Insertion_Unit_Name;
2587 procedure Set_Msg_Node (Node : Node_Id) is
2592 case Nkind (Node) is
2593 when N_Designator =>
2594 Set_Msg_Node (Name (Node));
2596 Set_Msg_Node (Identifier (Node));
2599 when N_Defining_Program_Unit_Name =>
2600 Set_Msg_Node (Name (Node));
2602 Set_Msg_Node (Defining_Identifier (Node));
2605 when N_Selected_Component | N_Expanded_Name =>
2606 Set_Msg_Node (Prefix (Node));
2608 Set_Msg_Node (Selector_Name (Node));
2615 -- The only remaining possibilities are identifiers, defining
2616 -- identifiers, pragmas, and pragma argument associations.
2618 if Nkind (Node) = N_Pragma then
2619 Nam := Pragma_Name (Node);
2621 -- The other cases have Chars fields, and we want to test for possible
2622 -- internal names, which generally represent something gone wrong. An
2623 -- exception is the case of internal type names, where we try to find a
2624 -- reasonable external representation for the external name
2626 elsif Is_Internal_Name (Chars (Node))
2628 ((Is_Entity_Name (Node)
2629 and then Present (Entity (Node))
2630 and then Is_Type (Entity (Node)))
2632 (Nkind (Node) = N_Defining_Identifier and then Is_Type (Node)))
2634 if Nkind (Node) = N_Identifier then
2635 Ent := Entity (Node);
2640 -- If the type is the designated type of an access_to_subprogram,
2641 -- then there is no name to provide in the call.
2643 if Ekind (Ent) = E_Subprogram_Type then
2646 -- Otherwise, we will be able to find some kind of name to output
2649 Unwind_Internal_Type (Ent);
2653 -- If not internal name, just use name in Chars field
2656 Nam := Chars (Node);
2659 -- At this stage, the name to output is in Nam
2661 Get_Unqualified_Decoded_Name_String (Nam);
2663 -- Remove trailing upper case letters from the name (useful for
2664 -- dealing with some cases of internal names.
2666 while Name_Len > 1 and then Name_Buffer (Name_Len) in 'A' .. 'Z' loop
2667 Name_Len := Name_Len - 1;
2670 -- If we have any of the names from standard that start with the
2671 -- characters "any " (e.g. Any_Type), then kill the message since
2672 -- almost certainly it is a junk cascaded message.
2675 and then Name_Buffer (1 .. 4) = "any "
2677 Kill_Message := True;
2680 -- Now we have to set the proper case. If we have a source location
2681 -- then do a check to see if the name in the source is the same name
2682 -- as the name in the Names table, except for possible differences
2683 -- in case, which is the case when we can copy from the source.
2686 Src_Loc : constant Source_Ptr := Sloc (Node);
2687 Sbuffer : Source_Buffer_Ptr;
2689 Src_Ptr : Source_Ptr;
2695 -- For standard locations, always use mixed case
2697 if Src_Loc <= No_Location
2698 or else Sloc (Node) <= No_Location
2700 Set_Casing (Mixed_Case);
2703 -- Determine if the reference we are dealing with corresponds to
2704 -- text at the point of the error reference. This will often be
2705 -- the case for simple identifier references, and is the case
2706 -- where we can copy the spelling from the source.
2708 Sbuffer := Source_Text (Get_Source_File_Index (Src_Loc));
2710 while Ref_Ptr <= Name_Len loop
2712 Fold_Lower (Sbuffer (Src_Ptr)) /=
2713 Fold_Lower (Name_Buffer (Ref_Ptr));
2714 Ref_Ptr := Ref_Ptr + 1;
2715 Src_Ptr := Src_Ptr + 1;
2718 -- If we get through the loop without a mismatch, then output the
2719 -- name the way it is spelled in the source program
2721 if Ref_Ptr > Name_Len then
2724 for J in 1 .. Name_Len loop
2725 Name_Buffer (J) := Sbuffer (Src_Ptr);
2726 Src_Ptr := Src_Ptr + 1;
2729 -- Otherwise set the casing using the default identifier casing
2732 Set_Casing (Identifier_Casing (Flag_Source), Mixed_Case);
2737 Set_Msg_Name_Buffer;
2745 procedure Set_Msg_Text (Text : String; Flag : Source_Ptr) is
2746 C : Character; -- Current character
2747 P : Natural; -- Current index;
2749 procedure Set_Msg_Insertion_Warning (C : Character);
2750 -- Deal with ? ?? ?x? ?X? insertion sequences (also < << <x< <X<). The
2751 -- caller has already bumped the pointer past the initial ? or < and C
2752 -- is set to this initial character (? or <).
2754 -------------------------------
2755 -- Set_Msg_Insertion_Warning --
2756 -------------------------------
2758 procedure Set_Msg_Insertion_Warning (C : Character) is
2760 if P <= Text'Last and then Text (P) = C then
2761 Warning_Msg_Char := '?';
2764 elsif P + 1 <= Text'Last
2765 and then (Text (P) in 'a' .. 'z'
2767 Text (P) in 'A' .. 'Z'
2770 and then Text (P + 1) = C
2772 Warning_Msg_Char := Text (P);
2775 Warning_Msg_Char := ' ';
2777 end Set_Msg_Insertion_Warning;
2779 -- Start of processing for Set_Msg_Text
2782 Manual_Quote_Mode := False;
2784 Flag_Source := Get_Source_File_Index (Flag);
2787 while P <= Text'Last loop
2791 -- Check for insertion character or sequence
2795 if P <= Text'Last and then Text (P) = '%' then
2797 Set_Msg_Insertion_Name_Literal;
2799 Set_Msg_Insertion_Name;
2803 if P <= Text'Last and then Text (P) = '$' then
2805 Set_Msg_Insertion_Unit_Name (Suffix => False);
2807 Set_Msg_Insertion_Unit_Name;
2811 Set_Msg_Insertion_File_Name;
2814 Set_Msg_Insertion_Type_Reference (Flag);
2817 Set_Msg_Insertion_Reserved_Name;
2820 Set_Msg_Insertion_Node;
2823 Set_Msg_Insertion_Line_Number (Error_Msg_Sloc, Flag);
2826 Continuation := True;
2828 if Text (P) = '\' then
2829 Continuation_New_Line := True;
2834 Set_Msg_Insertion_Column;
2837 Set_Msg_Insertion_Run_Time_Name;
2840 Set_Msg_Insertion_Uint;
2843 Manual_Quote_Mode := not Manual_Quote_Mode;
2847 null; -- already dealt with
2850 Set_Msg_Insertion_Warning ('?');
2854 -- Note: the prescan already set Is_Warning_Msg True if and
2855 -- only if Error_Msg_Warn is set to True. If Error_Msg_Warn
2856 -- is False, the call to Set_Msg_Insertion_Warning here does
2857 -- no harm, since Warning_Msg_Char is ignored in that case.
2859 Set_Msg_Insertion_Warning ('<');
2862 null; -- already dealt with
2865 Set_Msg_Char (Text (P));
2869 Set_Msg_Str (Error_Msg_String (1 .. Error_Msg_Strlen));
2871 -- Upper case letter
2875 -- Start of reserved word if two or more
2877 if P <= Text'Last and then Text (P) in 'A' .. 'Z' then
2879 Set_Msg_Insertion_Reserved_Word (Text, P);
2881 -- Single upper case letter is just inserted
2887 -- '[' (will be/would have been raised at run time)
2890 if Is_Warning_Msg then
2891 Set_Msg_Str ("will be raised at run time");
2893 Set_Msg_Str ("would have been raised at run time");
2896 -- ']' (may be/might have been raised at run time)
2899 if Is_Warning_Msg then
2900 Set_Msg_Str ("may be raised at run time");
2902 Set_Msg_Str ("might have been raised at run time");
2905 -- Normal character with no special treatment
2919 procedure Set_Posted (N : Node_Id) is
2923 if Is_Serious_Error then
2925 -- We always set Error_Posted on the node itself
2927 Set_Error_Posted (N);
2929 -- If it is a subexpression, then set Error_Posted on parents up to
2930 -- and including the first non-subexpression construct. This helps
2931 -- avoid cascaded error messages within a single expression.
2937 Set_Error_Posted (P);
2938 exit when Nkind (P) not in N_Subexpr;
2941 -- A special check, if we just posted an error on an attribute
2942 -- definition clause, then also set the entity involved as posted.
2943 -- For example, this stops complaining about the alignment after
2944 -- complaining about the size, which is likely to be useless.
2946 if Nkind (P) = N_Attribute_Definition_Clause then
2947 if Is_Entity_Name (Name (P)) then
2948 Set_Error_Posted (Entity (Name (P)));
2954 -----------------------
2955 -- Set_Qualification --
2956 -----------------------
2958 procedure Set_Qualification (N : Nat; E : Entity_Id) is
2960 if N /= 0 and then Scope (E) /= Standard_Standard then
2961 Set_Qualification (N - 1, Scope (E));
2962 Set_Msg_Node (Scope (E));
2965 end Set_Qualification;
2967 ------------------------
2968 -- Special_Msg_Delete --
2969 ------------------------
2971 -- Is it really right to have all this specialized knowledge in errout?
2973 function Special_Msg_Delete
2975 N : Node_Or_Entity_Id;
2976 E : Node_Or_Entity_Id) return Boolean
2979 -- Never delete messages in -gnatdO mode
2981 if Debug_Flag_OO then
2984 -- Processing for "atomic access cannot be guaranteed"
2986 elsif Msg = "atomic access to & cannot be guaranteed" then
2988 -- When an atomic object refers to a non-atomic type in the same
2989 -- scope, we implicitly make the type atomic. In the non-error case
2990 -- this is surely safe (and in fact prevents an error from occurring
2991 -- if the type is not atomic by default). But if the object cannot be
2992 -- made atomic, then we introduce an extra junk message by this
2993 -- manipulation, which we get rid of here.
2995 -- We identify this case by the fact that it references a type for
2996 -- which Is_Atomic is set, but there is no Atomic pragma setting it.
2999 and then Is_Atomic (E)
3000 and then No (Get_Rep_Pragma (E, Name_Atomic))
3005 -- Processing for "Size too small" messages
3007 elsif Msg = "size for& too small, minimum allowed is ^" then
3009 -- Suppress "size too small" errors in CodePeer mode, since code may
3010 -- be analyzed in a different configuration than the one used for
3011 -- compilation. Even when the configurations match, this message
3012 -- may be issued on correct code, because pragma Pack is ignored
3013 -- in CodePeer mode.
3015 if CodePeer_Mode then
3018 -- When a size is wrong for a frozen type there is no explicit size
3019 -- clause, and other errors have occurred, suppress the message,
3020 -- since it is likely that this size error is a cascaded result of
3021 -- other errors. The reason we eliminate unfrozen types is that
3022 -- messages issued before the freeze type are for sure OK.
3025 and then Serious_Errors_Detected > 0
3026 and then Nkind (N) /= N_Component_Clause
3027 and then Nkind (Parent (N)) /= N_Component_Clause
3029 No (Get_Attribute_Definition_Clause (E, Attribute_Size))
3031 No (Get_Attribute_Definition_Clause (E, Attribute_Object_Size))
3033 No (Get_Attribute_Definition_Clause (E, Attribute_Value_Size))
3039 -- All special tests complete, so go ahead with message
3042 end Special_Msg_Delete;
3044 --------------------------
3045 -- Unwind_Internal_Type --
3046 --------------------------
3048 procedure Unwind_Internal_Type (Ent : in out Entity_Id) is
3049 Derived : Boolean := False;
3051 Old_Ent : Entity_Id;
3054 -- Undo placement of a quote, since we will put it back later
3056 Mchar := Msg_Buffer (Msglen);
3059 Msglen := Msglen - 1;
3062 -- The loop here deals with recursive types, we are trying to find a
3063 -- related entity that is not an implicit type. Note that the check with
3064 -- Old_Ent stops us from getting "stuck". Also, we don't output the
3065 -- "type derived from" message more than once in the case where we climb
3066 -- up multiple levels.
3071 -- Implicit access type, use directly designated type In Ada 2005,
3072 -- the designated type may be an anonymous access to subprogram, in
3073 -- which case we can only point to its definition.
3075 if Is_Access_Type (Ent) then
3076 if Ekind (Ent) = E_Access_Subprogram_Type
3077 or else Ekind (Ent) = E_Anonymous_Access_Subprogram_Type
3078 or else Is_Access_Protected_Subprogram_Type (Ent)
3080 Ent := Directly_Designated_Type (Ent);
3082 if not Comes_From_Source (Ent) then
3083 if Buffer_Ends_With ("type ") then
3084 Buffer_Remove ("type ");
3088 if Ekind (Ent) = E_Function then
3089 Set_Msg_Str ("access to function ");
3090 elsif Ekind (Ent) = E_Procedure then
3091 Set_Msg_Str ("access to procedure ");
3093 Set_Msg_Str ("access to subprogram");
3098 -- Type is access to object, named or anonymous
3101 Set_Msg_Str ("access to ");
3102 Ent := Directly_Designated_Type (Ent);
3107 elsif Is_Class_Wide_Type (Ent) then
3109 Ent := Root_Type (Ent);
3111 -- Use base type if this is a subtype
3113 elsif Ent /= Base_Type (Ent) then
3114 Buffer_Remove ("type ");
3116 -- Avoid duplication "subtype of subtype of", and also replace
3117 -- "derived from subtype of" simply by "derived from"
3119 if not Buffer_Ends_With ("subtype of ")
3120 and then not Buffer_Ends_With ("derived from ")
3122 Set_Msg_Str ("subtype of ");
3125 Ent := Base_Type (Ent);
3127 -- If this is a base type with a first named subtype, use the first
3128 -- named subtype instead. This is not quite accurate in all cases,
3129 -- but it makes too much noise to be accurate and add 'Base in all
3130 -- cases. Note that we only do this is the first named subtype is not
3131 -- itself an internal name. This avoids the obvious loop (subtype ->
3132 -- basetype -> subtype) which would otherwise occur).
3136 FST : constant Entity_Id := First_Subtype (Ent);
3139 if not Is_Internal_Name (Chars (FST)) then
3143 -- Otherwise use root type
3147 Buffer_Remove ("type ");
3149 -- Test for "subtype of type derived from" which seems
3150 -- excessive and is replaced by "type derived from".
3152 Buffer_Remove ("subtype of");
3154 -- Avoid duplicated "type derived from type derived from"
3156 if not Buffer_Ends_With ("type derived from ") then
3157 Set_Msg_Str ("type derived from ");
3168 -- If we are stuck in a loop, get out and settle for the internal
3169 -- name after all. In this case we set to kill the message if it is
3170 -- not the first error message (we really try hard not to show the
3171 -- dirty laundry of the implementation to the poor user).
3173 if Ent = Old_Ent then
3174 Kill_Message := True;
3178 -- Get out if we finally found a non-internal name to use
3180 exit Find when not Is_Internal_Name (Chars (Ent));
3186 end Unwind_Internal_Type;
3192 procedure VMS_Convert is
3202 P := Msg_Buffer'First;
3208 if Msg_Buffer (P) = '-' then
3209 for G in Gnames'Range loop
3210 L := Gnames (G)'Length;
3212 -- See if we have "-ggg switch", where ggg is Gnames entry
3214 if P + L + 7 <= Msglen
3215 and then Msg_Buffer (P + 1 .. P + L) = Gnames (G).all
3216 and then Msg_Buffer (P + L + 1 .. P + L + 7) = " switch"
3218 -- Replace by "/vvv qualifier", where vvv is Vnames entry
3220 N := Vnames (G)'Length;
3221 Msg_Buffer (P + N + 11 .. Msglen + N - L + 3) :=
3222 Msg_Buffer (P + L + 8 .. Msglen);
3223 Msg_Buffer (P) := '/';
3224 Msg_Buffer (P + 1 .. P + N) := Vnames (G).all;
3225 Msg_Buffer (P + N + 1 .. P + N + 10) := " qualifier";
3227 Msglen := Msglen + N - L + 3;