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);
1343 Tag : constant String := Get_Warning_Tag (Cur);
1346 if (CE.Warn and not CE.Deleted)
1348 (Warning_Specifically_Suppressed (CE.Sptr, CE.Text, Tag) /=
1351 Warning_Specifically_Suppressed (CE.Optr, CE.Text, Tag) /=
1354 Delete_Warning (Cur);
1356 -- If this is a continuation, delete previous messages
1359 while Errors.Table (F).Msg_Cont loop
1360 F := Errors.Table (F).Prev;
1364 -- Delete any following continuations
1368 F := Errors.Table (F).Next;
1369 exit when F = No_Error_Msg;
1370 exit when not Errors.Table (F).Msg_Cont;
1376 Cur := Errors.Table (Cur).Next;
1379 Finalize_Called := True;
1381 -- Check consistency of specific warnings (may add warnings). We only
1382 -- do this on the last call, after all possible warnings are posted.
1385 Validate_Specific_Warnings (Error_Msg'Access);
1393 function First_Node (C : Node_Id) return Node_Id is
1394 Orig : constant Node_Id := Original_Node (C);
1395 Loc : constant Source_Ptr := Sloc (Orig);
1396 Sfile : constant Source_File_Index := Get_Source_File_Index (Loc);
1400 function Test_Earlier (N : Node_Id) return Traverse_Result;
1401 -- Function applied to every node in the construct
1403 procedure Search_Tree_First is new Traverse_Proc (Test_Earlier);
1404 -- Create traversal procedure
1410 function Test_Earlier (N : Node_Id) return Traverse_Result is
1411 Norig : constant Node_Id := Original_Node (N);
1412 Loc : constant Source_Ptr := Sloc (Norig);
1415 -- Check for earlier
1419 -- Ignore nodes with no useful location information
1421 and then Loc /= Standard_Location
1422 and then Loc /= No_Location
1424 -- Ignore nodes from a different file. This ensures against cases
1425 -- of strange foreign code somehow being present. We don't want
1426 -- wild placement of messages if that happens.
1428 and then Get_Source_File_Index (Loc) = Sfile
1437 -- Start of processing for First_Node
1440 if Nkind (Orig) in N_Subexpr then
1443 Search_Tree_First (Orig);
1455 function First_Sloc (N : Node_Id) return Source_Ptr is
1456 SI : constant Source_File_Index := Source_Index (Get_Source_Unit (N));
1457 SF : constant Source_Ptr := Source_First (SI);
1462 F := First_Node (N);
1465 -- The following circuit is a bit subtle. When we have parenthesized
1466 -- expressions, then the Sloc will not record the location of the paren,
1467 -- but we would like to post the flag on the paren. So what we do is to
1468 -- crawl up the tree from the First_Node, adjusting the Sloc value for
1469 -- any parentheses we know are present. Yes, we know this circuit is not
1470 -- 100% reliable (e.g. because we don't record all possible paren level
1471 -- values), but this is only for an error message so it is good enough.
1474 Paren_Loop : for J in 1 .. Paren_Count (F) loop
1476 -- We don't look more than 12 characters behind the current
1477 -- location, and in any case not past the front of the source.
1479 Search_Loop : for K in 1 .. 12 loop
1480 exit Search_Loop when S = SF;
1482 if Source_Text (SI) (S - 1) = '(' then
1486 elsif Source_Text (SI) (S - 1) <= ' ' then
1492 end loop Search_Loop;
1493 end loop Paren_Loop;
1495 exit Node_Loop when F = N;
1497 exit Node_Loop when Nkind (F) not in N_Subexpr;
1503 -----------------------
1504 -- Get_Ignore_Errors --
1505 -----------------------
1507 function Get_Ignore_Errors return Boolean is
1509 return Errors_Must_Be_Ignored;
1510 end Get_Ignore_Errors;
1516 procedure Initialize is
1519 First_Error_Msg := No_Error_Msg;
1520 Last_Error_Msg := No_Error_Msg;
1521 Serious_Errors_Detected := 0;
1522 Total_Errors_Detected := 0;
1523 Warnings_Treated_As_Errors := 0;
1524 Warnings_Detected := 0;
1525 Warnings_As_Errors_Count := 0;
1526 Cur_Msg := No_Error_Msg;
1529 -- Initialize warnings tables
1532 Specific_Warnings.Init;
1539 function No_Warnings (N : Node_Or_Entity_Id) return Boolean is
1541 if Error_Posted (N) then
1544 elsif Nkind (N) in N_Entity and then Has_Warnings_Off (N) then
1547 elsif Is_Entity_Name (N)
1548 and then Present (Entity (N))
1549 and then Has_Warnings_Off (Entity (N))
1562 function OK_Node (N : Node_Id) return Boolean is
1563 K : constant Node_Kind := Nkind (N);
1566 if Error_Posted (N) then
1569 elsif K in N_Has_Etype
1570 and then Present (Etype (N))
1571 and then Error_Posted (Etype (N))
1576 or else K = N_Attribute_Reference
1577 or else K = N_Character_Literal
1578 or else K = N_Expanded_Name
1579 or else K = N_Identifier
1580 or else K = N_Operator_Symbol)
1581 and then Present (Entity (N))
1582 and then Error_Posted (Entity (N))
1590 ---------------------
1591 -- Output_Messages --
1592 ---------------------
1594 procedure Output_Messages is
1598 procedure Write_Error_Summary;
1599 -- Write error summary
1601 procedure Write_Header (Sfile : Source_File_Index);
1602 -- Write header line (compiling or checking given file)
1604 procedure Write_Max_Errors;
1605 -- Write message if max errors reached
1607 -------------------------
1608 -- Write_Error_Summary --
1609 -------------------------
1611 procedure Write_Error_Summary is
1613 -- Extra blank line if error messages or source listing were output
1615 if Total_Errors_Detected + Warnings_Detected > 0
1621 -- Message giving number of lines read and number of errors detected.
1622 -- This normally goes to Standard_Output. The exception is when brief
1623 -- mode is not set, verbose mode (or full list mode) is set, and
1624 -- there are errors. In this case we send the message to standard
1625 -- error to make sure that *something* appears on standard error in
1626 -- an error situation.
1628 -- Formerly, only the "# errors" suffix was sent to stderr, whereas
1629 -- "# lines:" appeared on stdout. This caused problems on VMS when
1630 -- the stdout buffer was flushed, giving an extra line feed after
1633 if Total_Errors_Detected + Warnings_Detected /= 0
1634 and then not Brief_Output
1635 and then (Verbose_Mode or Full_List)
1640 -- Message giving total number of lines. Don't give this message if
1641 -- the Main_Source line is unknown (this happens in error situations,
1642 -- e.g. when integrated preprocessing fails).
1644 if Main_Source_File /= No_Source_File then
1646 Write_Int (Num_Source_Lines (Main_Source_File));
1648 if Num_Source_Lines (Main_Source_File) = 1 then
1649 Write_Str (" line: ");
1651 Write_Str (" lines: ");
1655 if Total_Errors_Detected = 0 then
1656 Write_Str ("No errors");
1658 elsif Total_Errors_Detected = 1 then
1659 Write_Str ("1 error");
1662 Write_Int (Total_Errors_Detected);
1663 Write_Str (" errors");
1666 if Warnings_Detected /= 0 then
1668 Write_Int (Warnings_Detected);
1669 Write_Str (" warning");
1671 if Warnings_Detected /= 1 then
1675 if Warning_Mode = Treat_As_Error then
1676 Write_Str (" (treated as error");
1678 if Warnings_Detected /= 1 then
1684 elsif Warnings_Treated_As_Errors /= 0 then
1686 Write_Int (Warnings_Treated_As_Errors);
1687 Write_Str (" treated as errors)");
1692 Set_Standard_Output;
1693 end Write_Error_Summary;
1699 procedure Write_Header (Sfile : Source_File_Index) is
1701 if Verbose_Mode or Full_List then
1702 if Original_Operating_Mode = Generate_Code then
1703 Write_Str ("Compiling: ");
1705 Write_Str ("Checking: ");
1708 Write_Name (Full_File_Name (Sfile));
1710 if not Debug_Flag_7 then
1711 Write_Str (" (source file time stamp: ");
1712 Write_Time_Stamp (Sfile);
1720 ----------------------
1721 -- Write_Max_Errors --
1722 ----------------------
1724 procedure Write_Max_Errors is
1726 if Maximum_Messages /= 0 then
1727 if Warnings_Detected >= Maximum_Messages then
1729 Write_Line ("maximum number of warnings output");
1730 Write_Line ("any further warnings suppressed");
1731 Set_Standard_Output;
1734 -- If too many errors print message
1736 if Total_Errors_Detected >= Maximum_Messages then
1738 Write_Line ("fatal error: maximum number of errors detected");
1739 Set_Standard_Output;
1742 end Write_Max_Errors;
1744 -- Start of processing for Output_Messages
1747 -- Error if Finalize has not been called
1749 if not Finalize_Called then
1750 raise Program_Error;
1753 -- Reset current error source file if the main unit has a pragma
1754 -- Source_Reference. This ensures outputting the proper name of
1755 -- the source file in this situation.
1757 if Main_Source_File = No_Source_File
1758 or else Num_SRef_Pragmas (Main_Source_File) /= 0
1760 Current_Error_Source_File := No_Source_File;
1765 if Brief_Output or (not Full_List and not Verbose_Mode) then
1768 E := First_Error_Msg;
1769 while E /= No_Error_Msg loop
1770 if not Errors.Table (E).Deleted and then not Debug_Flag_KK then
1771 if Full_Path_Name_For_Brief_Errors then
1772 Write_Name (Full_Ref_Name (Errors.Table (E).Sfile));
1774 Write_Name (Reference_Name (Errors.Table (E).Sfile));
1778 Write_Int (Int (Physical_To_Logical
1779 (Errors.Table (E).Line,
1780 Errors.Table (E).Sfile)));
1783 if Errors.Table (E).Col < 10 then
1787 Write_Int (Int (Errors.Table (E).Col));
1789 Output_Msg_Text (E);
1793 E := Errors.Table (E).Next;
1796 Set_Standard_Output;
1799 -- Full source listing case
1802 List_Pragmas_Index := 1;
1803 List_Pragmas_Mode := True;
1804 E := First_Error_Msg;
1806 -- Normal case, to stdout (copyright notice already output)
1808 if Full_List_File_Name = null then
1809 if not Debug_Flag_7 then
1816 Create_List_File_Access.all (Full_List_File_Name.all);
1817 Set_Special_Output (Write_List_Info_Access.all'Access);
1819 -- Write copyright notice to file
1821 if not Debug_Flag_7 then
1822 Write_Str ("GNAT ");
1823 Write_Str (Gnat_Version_String);
1825 Write_Str ("Copyright 1992-" &
1827 ", Free Software Foundation, Inc.");
1832 -- First list extended main source file units with errors
1834 for U in Main_Unit .. Last_Unit loop
1835 if In_Extended_Main_Source_Unit (Cunit_Entity (U))
1837 -- If debug flag d.m is set, only the main source is listed
1839 and then (U = Main_Unit or else not Debug_Flag_Dot_M)
1841 -- If the unit of the entity does not come from source, it is
1842 -- an implicit subprogram declaration for a child subprogram.
1843 -- Do not emit errors for it, they are listed with the body.
1846 (No (Cunit_Entity (U))
1847 or else Comes_From_Source (Cunit_Entity (U))
1848 or else not Is_Subprogram (Cunit_Entity (U)))
1851 Sfile : constant Source_File_Index := Source_Index (U);
1856 -- Only write the header if Sfile is known
1858 if Sfile /= No_Source_File then
1859 Write_Header (Sfile);
1863 -- Normally, we don't want an "error messages from file"
1864 -- message when listing the entire file, so we set the
1865 -- current source file as the current error source file.
1866 -- However, the old style of doing things was to list this
1867 -- message if pragma Source_Reference is present, even for
1868 -- the main unit. Since the purpose of the -gnatd.m switch
1869 -- is to duplicate the old behavior, we skip the reset if
1870 -- this debug flag is set.
1872 if not Debug_Flag_Dot_M then
1873 Current_Error_Source_File := Sfile;
1876 -- Only output the listing if Sfile is known, to avoid
1877 -- crashing the compiler.
1879 if Sfile /= No_Source_File then
1880 for N in 1 .. Last_Source_Line (Sfile) loop
1881 while E /= No_Error_Msg
1882 and then Errors.Table (E).Deleted
1884 E := Errors.Table (E).Next;
1889 and then Errors.Table (E).Line = N
1890 and then Errors.Table (E).Sfile = Sfile;
1892 Output_Source_Line (N, Sfile, Err_Flag);
1895 Output_Error_Msgs (E);
1897 if not Debug_Flag_2 then
1907 -- Then output errors, if any, for subsidiary units not in the
1908 -- main extended unit.
1910 -- Note: if debug flag d.m set, include errors for any units other
1911 -- than the main unit in the extended source unit (e.g. spec and
1912 -- subunits for a body).
1914 while E /= No_Error_Msg
1915 and then (not In_Extended_Main_Source_Unit (Errors.Table (E).Sptr)
1918 and then Get_Source_Unit
1919 (Errors.Table (E).Sptr) /= Main_Unit))
1921 if Errors.Table (E).Deleted then
1922 E := Errors.Table (E).Next;
1927 (Errors.Table (E).Line, Errors.Table (E).Sfile, True);
1928 Output_Error_Msgs (E);
1932 -- If output to file, write extra copy of error summary to the
1933 -- output file, and then close it.
1935 if Full_List_File_Name /= null then
1936 Write_Error_Summary;
1938 Close_List_File_Access.all;
1939 Cancel_Special_Output;
1943 -- Verbose mode (error lines only with error flags). Normally this is
1944 -- ignored in full list mode, unless we are listing to a file, in which
1945 -- case we still generate -gnatv output to standard output.
1948 and then (not Full_List or else Full_List_File_Name /= null)
1952 -- Output the header only when Main_Source_File is known
1954 if Main_Source_File /= No_Source_File then
1955 Write_Header (Main_Source_File);
1958 E := First_Error_Msg;
1960 -- Loop through error lines
1962 while E /= No_Error_Msg loop
1963 if Errors.Table (E).Deleted then
1964 E := Errors.Table (E).Next;
1968 (Errors.Table (E).Line, Errors.Table (E).Sfile, True);
1969 Output_Error_Msgs (E);
1974 -- Output error summary if verbose or full list mode
1976 if Verbose_Mode or else Full_List then
1977 Write_Error_Summary;
1982 if Warning_Mode = Treat_As_Error then
1983 Total_Errors_Detected := Total_Errors_Detected + Warnings_Detected;
1984 Warnings_Detected := 0;
1986 end Output_Messages;
1988 ------------------------
1989 -- Output_Source_Line --
1990 ------------------------
1992 procedure Output_Source_Line
1993 (L : Physical_Line_Number;
1994 Sfile : Source_File_Index;
2000 Line_Number_Output : Boolean := False;
2001 -- Set True once line number is output
2003 Empty_Line : Boolean := True;
2004 -- Set False if line includes at least one character
2007 if Sfile /= Current_Error_Source_File then
2008 Write_Str ("==============Error messages for ");
2010 case Sinput.File_Type (Sfile) is
2012 Write_Str ("source");
2014 when Sinput.Config =>
2015 Write_Str ("configuration pragmas");
2018 Write_Str ("symbol definition");
2020 when Sinput.Preproc =>
2021 Write_Str ("preprocessing data");
2024 Write_Str (" file: ");
2025 Write_Name (Full_File_Name (Sfile));
2028 if Num_SRef_Pragmas (Sfile) > 0 then
2029 Write_Str ("--------------Line numbers from file: ");
2030 Write_Name (Full_Ref_Name (Sfile));
2031 Write_Str (" (starting at line ");
2032 Write_Int (Int (First_Mapped_Line (Sfile)));
2037 Current_Error_Source_File := Sfile;
2040 if Errs or List_Pragmas_Mode then
2041 Output_Line_Number (Physical_To_Logical (L, Sfile));
2042 Line_Number_Output := True;
2045 S := Line_Start (L, Sfile);
2048 C := Source_Text (Sfile) (S);
2049 exit when C = ASCII.LF or else C = ASCII.CR or else C = EOF;
2051 -- Deal with matching entry in List_Pragmas table
2054 and then List_Pragmas_Index <= List_Pragmas.Last
2055 and then S = List_Pragmas.Table (List_Pragmas_Index).Ploc
2057 case List_Pragmas.Table (List_Pragmas_Index).Ptyp is
2061 -- Ignore if on line with errors so that error flags
2062 -- get properly listed with the error line .
2065 Write_Char (ASCII.FF);
2069 List_Pragmas_Mode := True;
2071 if not Line_Number_Output then
2072 Output_Line_Number (Physical_To_Logical (L, Sfile));
2073 Line_Number_Output := True;
2080 List_Pragmas_Mode := False;
2083 List_Pragmas_Index := List_Pragmas_Index + 1;
2085 -- Normal case (no matching entry in List_Pragmas table)
2088 if Errs or List_Pragmas_Mode then
2093 Empty_Line := False;
2097 -- If we have output a source line, then add the line terminator, with
2098 -- training spaces preserved (so we output the line exactly as input).
2100 if Line_Number_Output then
2104 Write_Eol_Keep_Blanks;
2107 end Output_Source_Line;
2109 -----------------------------
2110 -- Remove_Warning_Messages --
2111 -----------------------------
2113 procedure Remove_Warning_Messages (N : Node_Id) is
2115 function Check_For_Warning (N : Node_Id) return Traverse_Result;
2116 -- This function checks one node for a possible warning message
2118 function Check_All_Warnings is new Traverse_Func (Check_For_Warning);
2119 -- This defines the traversal operation
2121 -----------------------
2122 -- Check_For_Warning --
2123 -----------------------
2125 function Check_For_Warning (N : Node_Id) return Traverse_Result is
2126 Loc : constant Source_Ptr := Sloc (N);
2129 function To_Be_Removed (E : Error_Msg_Id) return Boolean;
2130 -- Returns True for a message that is to be removed. Also adjusts
2131 -- warning count appropriately.
2137 function To_Be_Removed (E : Error_Msg_Id) return Boolean is
2139 if E /= No_Error_Msg
2141 -- Don't remove if location does not match
2143 and then Errors.Table (E).Optr = Loc
2145 -- Don't remove if not warning/info message. Note that we do
2146 -- not remove style messages here. They are warning messages
2147 -- but not ones we want removed in this context.
2149 and then Errors.Table (E).Warn
2151 -- Don't remove unconditional messages
2153 and then not Errors.Table (E).Uncond
2155 Warnings_Detected := Warnings_Detected - 1;
2158 -- No removal required
2165 -- Start of processing for Check_For_Warnings
2168 while To_Be_Removed (First_Error_Msg) loop
2169 First_Error_Msg := Errors.Table (First_Error_Msg).Next;
2172 if First_Error_Msg = No_Error_Msg then
2173 Last_Error_Msg := No_Error_Msg;
2176 E := First_Error_Msg;
2177 while E /= No_Error_Msg loop
2178 while To_Be_Removed (Errors.Table (E).Next) loop
2179 Errors.Table (E).Next :=
2180 Errors.Table (Errors.Table (E).Next).Next;
2182 if Errors.Table (E).Next = No_Error_Msg then
2183 Last_Error_Msg := E;
2187 E := Errors.Table (E).Next;
2190 if Nkind (N) = N_Raise_Constraint_Error
2191 and then Original_Node (N) /= N
2192 and then No (Condition (N))
2194 -- Warnings may have been posted on subexpressions of the original
2195 -- tree. We place the original node back on the tree to remove
2196 -- those warnings, whose sloc do not match those of any node in
2197 -- the current tree. Given that we are in unreachable code, this
2198 -- modification to the tree is harmless.
2201 Status : Traverse_Final_Result;
2204 if Is_List_Member (N) then
2205 Set_Condition (N, Original_Node (N));
2206 Status := Check_All_Warnings (Condition (N));
2208 Rewrite (N, Original_Node (N));
2209 Status := Check_All_Warnings (N);
2218 end Check_For_Warning;
2220 -- Start of processing for Remove_Warning_Messages
2223 if Warnings_Detected /= 0 then
2225 Discard : Traverse_Final_Result;
2226 pragma Warnings (Off, Discard);
2229 Discard := Check_All_Warnings (N);
2232 end Remove_Warning_Messages;
2234 procedure Remove_Warning_Messages (L : List_Id) is
2237 if Is_Non_Empty_List (L) then
2239 while Present (Stat) loop
2240 Remove_Warning_Messages (Stat);
2244 end Remove_Warning_Messages;
2246 ---------------------------
2247 -- Set_Identifier_Casing --
2248 ---------------------------
2250 procedure Set_Identifier_Casing
2251 (Identifier_Name : System.Address;
2252 File_Name : System.Address)
2254 Ident : constant Big_String_Ptr := To_Big_String_Ptr (Identifier_Name);
2255 File : constant Big_String_Ptr := To_Big_String_Ptr (File_Name);
2258 Desired_Case : Casing_Type := Mixed_Case;
2259 -- Casing required for result. Default value of Mixed_Case is used if
2260 -- for some reason we cannot find the right file name in the table.
2263 -- Get length of file name
2266 while File (Flen + 1) /= ASCII.NUL loop
2270 -- Loop through file names to find matching one. This is a bit slow, but
2271 -- we only do it in error situations so it is not so terrible. Note that
2272 -- if the loop does not exit, then the desired case will be left set to
2273 -- Mixed_Case, this can happen if the name was not in canonical form,
2274 -- and gets canonicalized on VMS. Possibly we could fix this by
2275 -- unconditionally canonicalizing these names ???
2277 for J in 1 .. Last_Source_File loop
2278 Get_Name_String (Full_Debug_Name (J));
2281 and then Name_Buffer (1 .. Name_Len) = String (File (1 .. Flen))
2283 Desired_Case := Identifier_Casing (J);
2288 -- Copy identifier as given to Name_Buffer
2290 for J in Name_Buffer'Range loop
2291 Name_Buffer (J) := Ident (J);
2293 if Name_Buffer (J) = ASCII.NUL then
2299 Set_Casing (Desired_Case);
2300 end Set_Identifier_Casing;
2302 -----------------------
2303 -- Set_Ignore_Errors --
2304 -----------------------
2306 procedure Set_Ignore_Errors (To : Boolean) is
2308 Errors_Must_Be_Ignored := To;
2309 end Set_Ignore_Errors;
2311 ------------------------------
2312 -- Set_Msg_Insertion_Column --
2313 ------------------------------
2315 procedure Set_Msg_Insertion_Column is
2317 if RM_Column_Check then
2318 Set_Msg_Str (" in column ");
2319 Set_Msg_Int (Int (Error_Msg_Col) + 1);
2321 end Set_Msg_Insertion_Column;
2323 ----------------------------
2324 -- Set_Msg_Insertion_Node --
2325 ----------------------------
2327 procedure Set_Msg_Insertion_Node is
2332 Error_Msg_Node_1 = Error
2333 or else Error_Msg_Node_1 = Any_Type;
2335 if Error_Msg_Node_1 = Empty then
2336 Set_Msg_Blank_Conditional;
2337 Set_Msg_Str ("<empty>");
2339 elsif Error_Msg_Node_1 = Error then
2341 Set_Msg_Str ("<error>");
2343 elsif Error_Msg_Node_1 = Standard_Void_Type then
2345 Set_Msg_Str ("procedure name");
2347 elsif Nkind (Error_Msg_Node_1) in N_Entity
2348 and then Ekind (Error_Msg_Node_1) = E_Anonymous_Access_Subprogram_Type
2351 Set_Msg_Str ("access to subprogram");
2354 Set_Msg_Blank_Conditional;
2358 K := Nkind (Error_Msg_Node_1);
2360 -- If we have operator case, skip quotes since name of operator
2361 -- itself will supply the required quotations. An operator can be an
2362 -- applied use in an expression or an explicit operator symbol, or an
2363 -- identifier whose name indicates it is an operator.
2366 or else K = N_Operator_Symbol
2367 or else K = N_Defining_Operator_Symbol
2368 or else ((K = N_Identifier or else K = N_Defining_Identifier)
2369 and then Is_Operator_Name (Chars (Error_Msg_Node_1)))
2371 Set_Msg_Node (Error_Msg_Node_1);
2373 -- Normal case, not an operator, surround with quotes
2377 Set_Qualification (Error_Msg_Qual_Level, Error_Msg_Node_1);
2378 Set_Msg_Node (Error_Msg_Node_1);
2383 -- The following assignment ensures that a second ampersand insertion
2384 -- character will correspond to the Error_Msg_Node_2 parameter. We
2385 -- suppress possible validity checks in case operating in -gnatVa mode,
2386 -- and Error_Msg_Node_2 is not needed and has not been set.
2389 pragma Suppress (Range_Check);
2391 Error_Msg_Node_1 := Error_Msg_Node_2;
2393 end Set_Msg_Insertion_Node;
2395 --------------------------------------
2396 -- Set_Msg_Insertion_Type_Reference --
2397 --------------------------------------
2399 procedure Set_Msg_Insertion_Type_Reference (Flag : Source_Ptr) is
2405 if Error_Msg_Node_1 = Standard_Void_Type then
2406 Set_Msg_Str ("package or procedure name");
2409 elsif Error_Msg_Node_1 = Standard_Exception_Type then
2410 Set_Msg_Str ("exception name");
2413 elsif Error_Msg_Node_1 = Any_Access
2414 or else Error_Msg_Node_1 = Any_Array
2415 or else Error_Msg_Node_1 = Any_Boolean
2416 or else Error_Msg_Node_1 = Any_Character
2417 or else Error_Msg_Node_1 = Any_Composite
2418 or else Error_Msg_Node_1 = Any_Discrete
2419 or else Error_Msg_Node_1 = Any_Fixed
2420 or else Error_Msg_Node_1 = Any_Integer
2421 or else Error_Msg_Node_1 = Any_Modular
2422 or else Error_Msg_Node_1 = Any_Numeric
2423 or else Error_Msg_Node_1 = Any_Real
2424 or else Error_Msg_Node_1 = Any_Scalar
2425 or else Error_Msg_Node_1 = Any_String
2427 Get_Unqualified_Decoded_Name_String (Chars (Error_Msg_Node_1));
2428 Set_Msg_Name_Buffer;
2431 elsif Error_Msg_Node_1 = Universal_Real then
2432 Set_Msg_Str ("type universal real");
2435 elsif Error_Msg_Node_1 = Universal_Integer then
2436 Set_Msg_Str ("type universal integer");
2439 elsif Error_Msg_Node_1 = Universal_Fixed then
2440 Set_Msg_Str ("type universal fixed");
2444 -- Special case of anonymous array
2446 if Nkind (Error_Msg_Node_1) in N_Entity
2447 and then Is_Array_Type (Error_Msg_Node_1)
2448 and then Present (Related_Array_Object (Error_Msg_Node_1))
2450 Set_Msg_Str ("type of ");
2451 Set_Msg_Node (Related_Array_Object (Error_Msg_Node_1));
2452 Set_Msg_Str (" declared");
2453 Set_Msg_Insertion_Line_Number
2454 (Sloc (Related_Array_Object (Error_Msg_Node_1)), Flag);
2458 -- If we fall through, it is not a special case, so first output
2459 -- the name of the type, preceded by private for a private type
2461 if Is_Private_Type (Error_Msg_Node_1) then
2462 Set_Msg_Str ("private type ");
2464 Set_Msg_Str ("type ");
2467 Ent := Error_Msg_Node_1;
2469 if Is_Internal_Name (Chars (Ent)) then
2470 Unwind_Internal_Type (Ent);
2473 -- Types in Standard are displayed as "Standard.name"
2475 if Sloc (Ent) <= Standard_Location then
2477 Set_Msg_Str ("Standard.");
2482 -- Types in other language defined units are displayed as
2483 -- "package-name.type-name"
2486 Is_Predefined_File_Name (Unit_File_Name (Get_Source_Unit (Ent)))
2488 Get_Unqualified_Decoded_Name_String
2489 (Unit_Name (Get_Source_Unit (Ent)));
2490 Name_Len := Name_Len - 2;
2491 Set_Msg_Blank_Conditional;
2493 Set_Casing (Mixed_Case);
2494 Set_Msg_Name_Buffer;
2496 Set_Casing (Mixed_Case);
2501 -- All other types display as "type name" defined at line xxx
2502 -- possibly qualified if qualification is requested.
2506 Set_Qualification (Error_Msg_Qual_Level, Ent);
2510 -- If we did not print a name (e.g. in the case of an anonymous
2511 -- subprogram type), there is no name to print, so remove quotes.
2513 if Buffer_Ends_With ('"') then
2514 Buffer_Remove ('"');
2520 -- If the original type did not come from a predefined file, add the
2521 -- location where the type was defined.
2523 if Sloc (Error_Msg_Node_1) > Standard_Location
2525 not Is_Predefined_File_Name
2526 (Unit_File_Name (Get_Source_Unit (Error_Msg_Node_1)))
2528 Set_Msg_Str (" defined");
2529 Set_Msg_Insertion_Line_Number (Sloc (Error_Msg_Node_1), Flag);
2531 -- If it did come from a predefined file, deal with the case where
2532 -- this was a file with a generic instantiation from elsewhere.
2535 if Sloc (Error_Msg_Node_1) > Standard_Location then
2537 Iloc : constant Source_Ptr :=
2538 Instantiation_Location (Sloc (Error_Msg_Node_1));
2541 if Iloc /= No_Location
2542 and then not Suppress_Instance_Location
2544 Set_Msg_Str (" from instance");
2545 Set_Msg_Insertion_Line_Number (Iloc, Flag);
2550 end Set_Msg_Insertion_Type_Reference;
2552 ---------------------------------
2553 -- Set_Msg_Insertion_Unit_Name --
2554 ---------------------------------
2556 procedure Set_Msg_Insertion_Unit_Name (Suffix : Boolean := True) is
2558 if Error_Msg_Unit_1 = No_Unit_Name then
2561 elsif Error_Msg_Unit_1 = Error_Unit_Name then
2563 Set_Msg_Str ("<error>");
2566 Get_Unit_Name_String (Error_Msg_Unit_1, Suffix);
2569 Set_Msg_Name_Buffer;
2573 -- The following assignment ensures that a second percent insertion
2574 -- character will correspond to the Error_Msg_Unit_2 parameter. We
2575 -- suppress possible validity checks in case operating in -gnatVa mode,
2576 -- and Error_Msg_Unit_2 is not needed and has not been set.
2579 pragma Suppress (Range_Check);
2581 Error_Msg_Unit_1 := Error_Msg_Unit_2;
2583 end Set_Msg_Insertion_Unit_Name;
2589 procedure Set_Msg_Node (Node : Node_Id) is
2594 case Nkind (Node) is
2595 when N_Designator =>
2596 Set_Msg_Node (Name (Node));
2598 Set_Msg_Node (Identifier (Node));
2601 when N_Defining_Program_Unit_Name =>
2602 Set_Msg_Node (Name (Node));
2604 Set_Msg_Node (Defining_Identifier (Node));
2607 when N_Selected_Component | N_Expanded_Name =>
2608 Set_Msg_Node (Prefix (Node));
2610 Set_Msg_Node (Selector_Name (Node));
2617 -- The only remaining possibilities are identifiers, defining
2618 -- identifiers, pragmas, and pragma argument associations.
2620 if Nkind (Node) = N_Pragma then
2621 Nam := Pragma_Name (Node);
2623 -- The other cases have Chars fields, and we want to test for possible
2624 -- internal names, which generally represent something gone wrong. An
2625 -- exception is the case of internal type names, where we try to find a
2626 -- reasonable external representation for the external name
2628 elsif Is_Internal_Name (Chars (Node))
2630 ((Is_Entity_Name (Node)
2631 and then Present (Entity (Node))
2632 and then Is_Type (Entity (Node)))
2634 (Nkind (Node) = N_Defining_Identifier and then Is_Type (Node)))
2636 if Nkind (Node) = N_Identifier then
2637 Ent := Entity (Node);
2642 -- If the type is the designated type of an access_to_subprogram,
2643 -- then there is no name to provide in the call.
2645 if Ekind (Ent) = E_Subprogram_Type then
2648 -- Otherwise, we will be able to find some kind of name to output
2651 Unwind_Internal_Type (Ent);
2655 -- If not internal name, just use name in Chars field
2658 Nam := Chars (Node);
2661 -- At this stage, the name to output is in Nam
2663 Get_Unqualified_Decoded_Name_String (Nam);
2665 -- Remove trailing upper case letters from the name (useful for
2666 -- dealing with some cases of internal names.
2668 while Name_Len > 1 and then Name_Buffer (Name_Len) in 'A' .. 'Z' loop
2669 Name_Len := Name_Len - 1;
2672 -- If we have any of the names from standard that start with the
2673 -- characters "any " (e.g. Any_Type), then kill the message since
2674 -- almost certainly it is a junk cascaded message.
2677 and then Name_Buffer (1 .. 4) = "any "
2679 Kill_Message := True;
2682 -- Now we have to set the proper case. If we have a source location
2683 -- then do a check to see if the name in the source is the same name
2684 -- as the name in the Names table, except for possible differences
2685 -- in case, which is the case when we can copy from the source.
2688 Src_Loc : constant Source_Ptr := Sloc (Node);
2689 Sbuffer : Source_Buffer_Ptr;
2691 Src_Ptr : Source_Ptr;
2697 -- For standard locations, always use mixed case
2699 if Src_Loc <= No_Location
2700 or else Sloc (Node) <= No_Location
2702 Set_Casing (Mixed_Case);
2705 -- Determine if the reference we are dealing with corresponds to
2706 -- text at the point of the error reference. This will often be
2707 -- the case for simple identifier references, and is the case
2708 -- where we can copy the spelling from the source.
2710 Sbuffer := Source_Text (Get_Source_File_Index (Src_Loc));
2712 while Ref_Ptr <= Name_Len loop
2714 Fold_Lower (Sbuffer (Src_Ptr)) /=
2715 Fold_Lower (Name_Buffer (Ref_Ptr));
2716 Ref_Ptr := Ref_Ptr + 1;
2717 Src_Ptr := Src_Ptr + 1;
2720 -- If we get through the loop without a mismatch, then output the
2721 -- name the way it is spelled in the source program
2723 if Ref_Ptr > Name_Len then
2726 for J in 1 .. Name_Len loop
2727 Name_Buffer (J) := Sbuffer (Src_Ptr);
2728 Src_Ptr := Src_Ptr + 1;
2731 -- Otherwise set the casing using the default identifier casing
2734 Set_Casing (Identifier_Casing (Flag_Source), Mixed_Case);
2739 Set_Msg_Name_Buffer;
2747 procedure Set_Msg_Text (Text : String; Flag : Source_Ptr) is
2748 C : Character; -- Current character
2749 P : Natural; -- Current index;
2751 procedure Set_Msg_Insertion_Warning (C : Character);
2752 -- Deal with ? ?? ?x? ?X? insertion sequences (also < << <x< <X<). The
2753 -- caller has already bumped the pointer past the initial ? or < and C
2754 -- is set to this initial character (? or <).
2756 -------------------------------
2757 -- Set_Msg_Insertion_Warning --
2758 -------------------------------
2760 procedure Set_Msg_Insertion_Warning (C : Character) is
2762 if P <= Text'Last and then Text (P) = C then
2763 Warning_Msg_Char := '?';
2766 elsif P + 1 <= Text'Last
2767 and then (Text (P) in 'a' .. 'z'
2769 Text (P) in 'A' .. 'Z'
2772 and then Text (P + 1) = C
2774 Warning_Msg_Char := Text (P);
2777 Warning_Msg_Char := ' ';
2779 end Set_Msg_Insertion_Warning;
2781 -- Start of processing for Set_Msg_Text
2784 Manual_Quote_Mode := False;
2786 Flag_Source := Get_Source_File_Index (Flag);
2789 while P <= Text'Last loop
2793 -- Check for insertion character or sequence
2797 if P <= Text'Last and then Text (P) = '%' then
2799 Set_Msg_Insertion_Name_Literal;
2801 Set_Msg_Insertion_Name;
2805 if P <= Text'Last and then Text (P) = '$' then
2807 Set_Msg_Insertion_Unit_Name (Suffix => False);
2809 Set_Msg_Insertion_Unit_Name;
2813 Set_Msg_Insertion_File_Name;
2816 Set_Msg_Insertion_Type_Reference (Flag);
2819 Set_Msg_Insertion_Reserved_Name;
2822 Set_Msg_Insertion_Node;
2825 Set_Msg_Insertion_Line_Number (Error_Msg_Sloc, Flag);
2828 Continuation := True;
2830 if Text (P) = '\' then
2831 Continuation_New_Line := True;
2836 Set_Msg_Insertion_Column;
2839 Set_Msg_Insertion_Run_Time_Name;
2842 Set_Msg_Insertion_Uint;
2845 Manual_Quote_Mode := not Manual_Quote_Mode;
2849 null; -- already dealt with
2852 Set_Msg_Insertion_Warning ('?');
2856 -- Note: the prescan already set Is_Warning_Msg True if and
2857 -- only if Error_Msg_Warn is set to True. If Error_Msg_Warn
2858 -- is False, the call to Set_Msg_Insertion_Warning here does
2859 -- no harm, since Warning_Msg_Char is ignored in that case.
2861 Set_Msg_Insertion_Warning ('<');
2864 null; -- already dealt with
2867 Set_Msg_Char (Text (P));
2871 Set_Msg_Str (Error_Msg_String (1 .. Error_Msg_Strlen));
2873 -- Upper case letter
2877 -- Start of reserved word if two or more
2879 if P <= Text'Last and then Text (P) in 'A' .. 'Z' then
2881 Set_Msg_Insertion_Reserved_Word (Text, P);
2883 -- Single upper case letter is just inserted
2889 -- '[' (will be/would have been raised at run time)
2892 if Is_Warning_Msg then
2893 Set_Msg_Str ("will be raised at run time");
2895 Set_Msg_Str ("would have been raised at run time");
2898 -- ']' (may be/might have been raised at run time)
2901 if Is_Warning_Msg then
2902 Set_Msg_Str ("may be raised at run time");
2904 Set_Msg_Str ("might have been raised at run time");
2907 -- Normal character with no special treatment
2921 procedure Set_Posted (N : Node_Id) is
2925 if Is_Serious_Error then
2927 -- We always set Error_Posted on the node itself
2929 Set_Error_Posted (N);
2931 -- If it is a subexpression, then set Error_Posted on parents up to
2932 -- and including the first non-subexpression construct. This helps
2933 -- avoid cascaded error messages within a single expression.
2939 Set_Error_Posted (P);
2940 exit when Nkind (P) not in N_Subexpr;
2943 -- A special check, if we just posted an error on an attribute
2944 -- definition clause, then also set the entity involved as posted.
2945 -- For example, this stops complaining about the alignment after
2946 -- complaining about the size, which is likely to be useless.
2948 if Nkind (P) = N_Attribute_Definition_Clause then
2949 if Is_Entity_Name (Name (P)) then
2950 Set_Error_Posted (Entity (Name (P)));
2956 -----------------------
2957 -- Set_Qualification --
2958 -----------------------
2960 procedure Set_Qualification (N : Nat; E : Entity_Id) is
2962 if N /= 0 and then Scope (E) /= Standard_Standard then
2963 Set_Qualification (N - 1, Scope (E));
2964 Set_Msg_Node (Scope (E));
2967 end Set_Qualification;
2969 ------------------------
2970 -- Special_Msg_Delete --
2971 ------------------------
2973 -- Is it really right to have all this specialized knowledge in errout?
2975 function Special_Msg_Delete
2977 N : Node_Or_Entity_Id;
2978 E : Node_Or_Entity_Id) return Boolean
2981 -- Never delete messages in -gnatdO mode
2983 if Debug_Flag_OO then
2986 -- Processing for "atomic access cannot be guaranteed"
2988 elsif Msg = "atomic access to & cannot be guaranteed" then
2990 -- When an atomic object refers to a non-atomic type in the same
2991 -- scope, we implicitly make the type atomic. In the non-error case
2992 -- this is surely safe (and in fact prevents an error from occurring
2993 -- if the type is not atomic by default). But if the object cannot be
2994 -- made atomic, then we introduce an extra junk message by this
2995 -- manipulation, which we get rid of here.
2997 -- We identify this case by the fact that it references a type for
2998 -- which Is_Atomic is set, but there is no Atomic pragma setting it.
3001 and then Is_Atomic (E)
3002 and then No (Get_Rep_Pragma (E, Name_Atomic))
3007 -- Processing for "Size too small" messages
3009 elsif Msg = "size for& too small, minimum allowed is ^" then
3011 -- Suppress "size too small" errors in CodePeer mode, since code may
3012 -- be analyzed in a different configuration than the one used for
3013 -- compilation. Even when the configurations match, this message
3014 -- may be issued on correct code, because pragma Pack is ignored
3015 -- in CodePeer mode.
3017 if CodePeer_Mode then
3020 -- When a size is wrong for a frozen type there is no explicit size
3021 -- clause, and other errors have occurred, suppress the message,
3022 -- since it is likely that this size error is a cascaded result of
3023 -- other errors. The reason we eliminate unfrozen types is that
3024 -- messages issued before the freeze type are for sure OK.
3027 and then Serious_Errors_Detected > 0
3028 and then Nkind (N) /= N_Component_Clause
3029 and then Nkind (Parent (N)) /= N_Component_Clause
3031 No (Get_Attribute_Definition_Clause (E, Attribute_Size))
3033 No (Get_Attribute_Definition_Clause (E, Attribute_Object_Size))
3035 No (Get_Attribute_Definition_Clause (E, Attribute_Value_Size))
3041 -- All special tests complete, so go ahead with message
3044 end Special_Msg_Delete;
3046 --------------------------
3047 -- Unwind_Internal_Type --
3048 --------------------------
3050 procedure Unwind_Internal_Type (Ent : in out Entity_Id) is
3051 Derived : Boolean := False;
3053 Old_Ent : Entity_Id;
3056 -- Undo placement of a quote, since we will put it back later
3058 Mchar := Msg_Buffer (Msglen);
3061 Msglen := Msglen - 1;
3064 -- The loop here deals with recursive types, we are trying to find a
3065 -- related entity that is not an implicit type. Note that the check with
3066 -- Old_Ent stops us from getting "stuck". Also, we don't output the
3067 -- "type derived from" message more than once in the case where we climb
3068 -- up multiple levels.
3073 -- Implicit access type, use directly designated type In Ada 2005,
3074 -- the designated type may be an anonymous access to subprogram, in
3075 -- which case we can only point to its definition.
3077 if Is_Access_Type (Ent) then
3078 if Ekind (Ent) = E_Access_Subprogram_Type
3079 or else Ekind (Ent) = E_Anonymous_Access_Subprogram_Type
3080 or else Is_Access_Protected_Subprogram_Type (Ent)
3082 Ent := Directly_Designated_Type (Ent);
3084 if not Comes_From_Source (Ent) then
3085 if Buffer_Ends_With ("type ") then
3086 Buffer_Remove ("type ");
3090 if Ekind (Ent) = E_Function then
3091 Set_Msg_Str ("access to function ");
3092 elsif Ekind (Ent) = E_Procedure then
3093 Set_Msg_Str ("access to procedure ");
3095 Set_Msg_Str ("access to subprogram");
3100 -- Type is access to object, named or anonymous
3103 Set_Msg_Str ("access to ");
3104 Ent := Directly_Designated_Type (Ent);
3109 elsif Is_Class_Wide_Type (Ent) then
3111 Ent := Root_Type (Ent);
3113 -- Use base type if this is a subtype
3115 elsif Ent /= Base_Type (Ent) then
3116 Buffer_Remove ("type ");
3118 -- Avoid duplication "subtype of subtype of", and also replace
3119 -- "derived from subtype of" simply by "derived from"
3121 if not Buffer_Ends_With ("subtype of ")
3122 and then not Buffer_Ends_With ("derived from ")
3124 Set_Msg_Str ("subtype of ");
3127 Ent := Base_Type (Ent);
3129 -- If this is a base type with a first named subtype, use the first
3130 -- named subtype instead. This is not quite accurate in all cases,
3131 -- but it makes too much noise to be accurate and add 'Base in all
3132 -- cases. Note that we only do this is the first named subtype is not
3133 -- itself an internal name. This avoids the obvious loop (subtype ->
3134 -- basetype -> subtype) which would otherwise occur).
3138 FST : constant Entity_Id := First_Subtype (Ent);
3141 if not Is_Internal_Name (Chars (FST)) then
3145 -- Otherwise use root type
3149 Buffer_Remove ("type ");
3151 -- Test for "subtype of type derived from" which seems
3152 -- excessive and is replaced by "type derived from".
3154 Buffer_Remove ("subtype of");
3156 -- Avoid duplicated "type derived from type derived from"
3158 if not Buffer_Ends_With ("type derived from ") then
3159 Set_Msg_Str ("type derived from ");
3170 -- If we are stuck in a loop, get out and settle for the internal
3171 -- name after all. In this case we set to kill the message if it is
3172 -- not the first error message (we really try hard not to show the
3173 -- dirty laundry of the implementation to the poor user).
3175 if Ent = Old_Ent then
3176 Kill_Message := True;
3180 -- Get out if we finally found a non-internal name to use
3182 exit Find when not Is_Internal_Name (Chars (Ent));
3188 end Unwind_Internal_Type;
3194 procedure VMS_Convert is
3204 P := Msg_Buffer'First;
3210 if Msg_Buffer (P) = '-' then
3211 for G in Gnames'Range loop
3212 L := Gnames (G)'Length;
3214 -- See if we have "-ggg switch", where ggg is Gnames entry
3216 if P + L + 7 <= Msglen
3217 and then Msg_Buffer (P + 1 .. P + L) = Gnames (G).all
3218 and then Msg_Buffer (P + L + 1 .. P + L + 7) = " switch"
3220 -- Replace by "/vvv qualifier", where vvv is Vnames entry
3222 N := Vnames (G)'Length;
3223 Msg_Buffer (P + N + 11 .. Msglen + N - L + 3) :=
3224 Msg_Buffer (P + L + 8 .. Msglen);
3225 Msg_Buffer (P) := '/';
3226 Msg_Buffer (P + 1 .. P + N) := Vnames (G).all;
3227 Msg_Buffer (P + N + 1 .. P + N + 10) := " qualifier";
3229 Msglen := Msglen + N - L + 3;