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 function Warn_Insertion return String;
201 -- This is called for warning messages only (so Warning_Msg_Char is set)
202 -- and returns a corresponding string to use at the beginning of generated
203 -- auxiliary messages, such as "in instantiation at ...".
204 -- 'a' .. 'z' returns "?x?"
205 -- 'A' .. 'Z' returns "?X?"
207 -- '$' returns "?$?info: "
209 -- No other settings are valid
211 -----------------------
212 -- Change_Error_Text --
213 -----------------------
215 procedure Change_Error_Text (Error_Id : Error_Msg_Id; New_Msg : String) is
216 Save_Next : Error_Msg_Id;
217 Err_Id : Error_Msg_Id := Error_Id;
220 Set_Msg_Text (New_Msg, Errors.Table (Error_Id).Sptr);
221 Errors.Table (Error_Id).Text := new String'(Msg_Buffer (1 .. Msglen));
223 -- If in immediate error message mode, output modified error message now
224 -- This is just a bit tricky, because we want to output just a single
225 -- message, and the messages we modified is already linked in. We solve
226 -- this by temporarily resetting its forward pointer to empty.
228 if Debug_Flag_OO then
229 Save_Next := Errors.Table (Error_Id).Next;
230 Errors.Table (Error_Id).Next := No_Error_Msg;
233 (Errors.Table (Error_Id).Line, Errors.Table (Error_Id).Sfile, True);
234 Output_Error_Msgs (Err_Id);
235 Errors.Table (Error_Id).Next := Save_Next;
237 end Change_Error_Text;
239 ------------------------
240 -- Compilation_Errors --
241 ------------------------
243 function Compilation_Errors return Boolean is
245 if not Finalize_Called then
248 return Erroutc.Compilation_Errors;
250 end Compilation_Errors;
256 -- Error_Msg posts a flag at the given location, except that if the
257 -- Flag_Location points within a generic template and corresponds to an
258 -- instantiation of this generic template, then the actual message will be
259 -- posted on the generic instantiation, along with additional messages
260 -- referencing the generic declaration.
262 procedure Error_Msg (Msg : String; Flag_Location : Source_Ptr) is
263 Sindex : Source_File_Index;
264 -- Source index for flag location
266 Orig_Loc : Source_Ptr;
267 -- Original location of Flag_Location (i.e. location in original
268 -- template in instantiation case, otherwise unchanged).
271 -- It is a fatal error to issue an error message when scanning from the
272 -- internal source buffer (see Sinput for further documentation)
274 pragma Assert (Sinput.Source /= Internal_Source_Ptr);
276 -- Return if all errors are to be ignored
278 if Errors_Must_Be_Ignored then
282 -- If we already have messages, and we are trying to place a message at
283 -- No_Location or in package Standard, then just ignore the attempt
284 -- since we assume that what is happening is some cascaded junk. Note
285 -- that this is safe in the sense that proceeding will surely bomb.
287 if Flag_Location < First_Source_Ptr
288 and then Total_Errors_Detected > 0
293 -- Start of processing for new message
295 Sindex := Get_Source_File_Index (Flag_Location);
296 Prescan_Message (Msg);
297 Orig_Loc := Original_Location (Flag_Location);
299 -- If the current location is in an instantiation, the issue arises of
300 -- whether to post the message on the template or the instantiation.
302 -- The way we decide is to see if we have posted the same message on
303 -- the template when we compiled the template (the template is always
304 -- compiled before any instantiations). For this purpose, we use a
305 -- separate table of messages. The reason we do this is twofold:
307 -- First, the messages can get changed by various processing
308 -- including the insertion of tokens etc, making it hard to
309 -- do the comparison.
311 -- Second, we will suppress a warning on a template if it is not in
312 -- the current extended source unit. That's reasonable and means we
313 -- don't want the warning on the instantiation here either, but it
314 -- does mean that the main error table would not in any case include
317 if Flag_Location = Orig_Loc then
318 Non_Instance_Msgs.Append ((new String'(Msg), Flag_Location));
319 Warn_On_Instance := False;
321 -- Here we have an instance message
324 -- Delete if debug flag off, and this message duplicates a message
325 -- already posted on the corresponding template
327 if not Debug_Flag_GG then
328 for J in Non_Instance_Msgs.First .. Non_Instance_Msgs.Last loop
329 if Msg = Non_Instance_Msgs.Table (J).Msg.all
330 and then Non_Instance_Msgs.Table (J).Loc = Orig_Loc
337 -- No duplicate, so error/warning will be posted on instance
339 Warn_On_Instance := Is_Warning_Msg;
342 -- Ignore warning message that is suppressed for this location. Note
343 -- that style checks are not considered warning messages for this
346 if Is_Warning_Msg and then Warnings_Suppressed (Orig_Loc) /= No_String
350 -- For style messages, check too many messages so far
353 and then Maximum_Messages /= 0
354 and then Warnings_Detected >= Maximum_Messages
359 -- The idea at this stage is that we have two kinds of messages
361 -- First, we have those messages that are to be placed as requested at
362 -- Flag_Location. This includes messages that have nothing to do with
363 -- generics, and also messages placed on generic templates that reflect
364 -- an error in the template itself. For such messages we simply call
365 -- Error_Msg_Internal to place the message in the requested location.
367 if Instantiation (Sindex) = No_Location then
368 Error_Msg_Internal (Msg, Flag_Location, Flag_Location, False);
372 -- If we are trying to flag an error in an instantiation, we may have
373 -- a generic contract violation. What we generate in this case is:
375 -- instantiation error at ...
376 -- original error message
380 -- warning: in instantiation at
381 -- warning: original warning message
383 -- All these messages are posted at the location of the top level
384 -- instantiation. If there are nested instantiations, then the
385 -- instantiation error message can be repeated, pointing to each
386 -- of the relevant instantiations.
388 -- Note: the instantiation mechanism is also shared for inlining of
389 -- subprogram bodies when front end inlining is done. In this case the
390 -- messages have the form:
392 -- in inlined body at ...
393 -- original error message
397 -- warning: in inlined body at
398 -- warning: original warning message
400 -- OK, here we have an instantiation error, and we need to generate the
401 -- error on the instantiation, rather than on the template.
404 Actual_Error_Loc : Source_Ptr;
405 -- Location of outer level instantiation in instantiation case, or
406 -- just a copy of Flag_Location in the normal case. This is the
407 -- location where all error messages will actually be posted.
409 Save_Error_Msg_Sloc : constant Source_Ptr := Error_Msg_Sloc;
410 -- Save possible location set for caller's message. We need to use
411 -- Error_Msg_Sloc for the location of the instantiation error but we
412 -- have to preserve a possible original value.
414 X : Source_File_Index;
416 Msg_Cont_Status : Boolean;
417 -- Used to label continuation lines in instantiation case with
418 -- proper Msg_Cont status.
421 -- Loop to find highest level instantiation, where all error
422 -- messages will be placed.
426 Actual_Error_Loc := Instantiation (X);
427 X := Get_Source_File_Index (Actual_Error_Loc);
428 exit when Instantiation (X) = No_Location;
431 -- Since we are generating the messages at the instantiation point in
432 -- any case, we do not want the references to the bad lines in the
433 -- instance to be annotated with the location of the instantiation.
435 Suppress_Instance_Location := True;
436 Msg_Cont_Status := False;
438 -- Loop to generate instantiation messages
440 Error_Msg_Sloc := Flag_Location;
441 X := Get_Source_File_Index (Flag_Location);
442 while Instantiation (X) /= No_Location loop
444 -- Suppress instantiation message on continuation lines
446 if Msg (Msg'First) /= '\' then
448 -- Case of inlined body
450 if Inlined_Body (X) then
451 if Is_Warning_Msg or Is_Style_Msg then
453 (Warn_Insertion & "in inlined body #",
454 Actual_Error_Loc, Flag_Location, Msg_Cont_Status);
457 ("error in inlined body #",
458 Actual_Error_Loc, Flag_Location, Msg_Cont_Status);
461 -- Case of generic instantiation
464 if Is_Warning_Msg or else Is_Style_Msg then
466 (Warn_Insertion & "in instantiation #",
467 Actual_Error_Loc, Flag_Location, Msg_Cont_Status);
470 ("instantiation error #",
471 Actual_Error_Loc, Flag_Location, Msg_Cont_Status);
476 Error_Msg_Sloc := Instantiation (X);
477 X := Get_Source_File_Index (Error_Msg_Sloc);
478 Msg_Cont_Status := True;
481 Suppress_Instance_Location := False;
482 Error_Msg_Sloc := Save_Error_Msg_Sloc;
484 -- Here we output the original message on the outer instantiation
487 (Msg, Actual_Error_Loc, Flag_Location, Msg_Cont_Status);
491 --------------------------------
492 -- Error_Msg_Ada_2012_Feature --
493 --------------------------------
495 procedure Error_Msg_Ada_2012_Feature (Feature : String; Loc : Source_Ptr) is
497 if Ada_Version < Ada_2012 then
498 Error_Msg (Feature & " is an Ada 2012 feature", Loc);
500 if No (Ada_Version_Pragma) then
501 Error_Msg ("\unit must be compiled with -gnat2012 switch", Loc);
503 Error_Msg_Sloc := Sloc (Ada_Version_Pragma);
504 Error_Msg ("\incompatible with Ada version set#", Loc);
507 end Error_Msg_Ada_2012_Feature;
513 procedure Error_Msg_AP (Msg : String) is
518 -- If we had saved the Scan_Ptr value after scanning the previous
519 -- token, then we would have exactly the right place for putting
520 -- the flag immediately at hand. However, that would add at least
521 -- two instructions to a Scan call *just* to service the possibility
522 -- of an Error_Msg_AP call. So instead we reconstruct that value.
524 -- We have two possibilities, start with Prev_Token_Ptr and skip over
525 -- the current token, which is made harder by the possibility that this
526 -- token may be in error, or start with Token_Ptr and work backwards.
527 -- We used to take the second approach, but it's hard because of
528 -- comments, and harder still because things that look like comments
529 -- can appear inside strings. So now we take the first approach.
531 -- Note: in the case where there is no previous token, Prev_Token_Ptr
532 -- is set to Source_First, which is a reasonable position for the
533 -- error flag in this situation.
535 S1 := Prev_Token_Ptr;
538 -- If the previous token is a string literal, we need a special approach
539 -- since there may be white space inside the literal and we don't want
540 -- to stop on that white space.
542 -- Note: since this is an error recovery issue anyway, it is not worth
543 -- worrying about special UTF_32 line terminator characters here.
545 if Prev_Token = Tok_String_Literal then
549 if Source (S1) = C then
551 exit when Source (S1) /= C;
552 elsif Source (S1) in Line_Terminator then
557 -- Character literal also needs special handling
559 elsif Prev_Token = Tok_Char_Literal then
562 -- Otherwise we search forward for the end of the current token, marked
563 -- by a line terminator, white space, a comment symbol or if we bump
564 -- into the following token (i.e. the current token).
566 -- Again, it is not worth worrying about UTF_32 special line terminator
567 -- characters in this context, since this is only for error recovery.
570 while Source (S1) not in Line_Terminator
571 and then Source (S1) /= ' '
572 and then Source (S1) /= ASCII.HT
573 and then (Source (S1) /= '-' or else Source (S1 + 1) /= '-')
574 and then S1 /= Token_Ptr
580 -- S1 is now set to the location for the flag
589 procedure Error_Msg_BC (Msg : String) is
591 -- If we are at end of file, post the flag after the previous token
593 if Token = Tok_EOF then
596 -- If we are at start of file, post the flag at the current token
598 elsif Token_Ptr = Source_First (Current_Source_File) then
601 -- If the character before the current token is a space or a horizontal
602 -- tab, then we place the flag on this character (in the case of a tab
603 -- we would really like to place it in the "last" character of the tab
604 -- space, but that it too much trouble to worry about).
606 elsif Source (Token_Ptr - 1) = ' '
607 or else Source (Token_Ptr - 1) = ASCII.HT
609 Error_Msg (Msg, Token_Ptr - 1);
611 -- If there is no space or tab before the current token, then there is
612 -- no room to place the flag before the token, so we place it on the
613 -- token instead (this happens for example at the start of a line).
616 Error_Msg (Msg, Token_Ptr);
624 procedure Error_Msg_CRT (Feature : String; N : Node_Id) is
625 CNRT : constant String := " not allowed in no run time mode";
626 CCRT : constant String := " not supported by configuration>";
628 S : String (1 .. Feature'Length + 1 + CCRT'Length);
633 S (2 .. Feature'Length + 1) := Feature;
634 L := Feature'Length + 2;
636 if No_Run_Time_Mode then
637 S (L .. L + CNRT'Length - 1) := CNRT;
638 L := L + CNRT'Length - 1;
640 else pragma Assert (Configurable_Run_Time_Mode);
641 S (L .. L + CCRT'Length - 1) := CCRT;
642 L := L + CCRT'Length - 1;
645 Error_Msg_N (S (1 .. L), N);
646 Configurable_Run_Time_Violations := Configurable_Run_Time_Violations + 1;
653 procedure Error_Msg_PT (Typ : Node_Id; Subp : Node_Id) is
656 ("first formal of & must be of mode `OUT`, `IN OUT` or " &
657 "access-to-variable", Typ, Subp);
659 ("\in order to be overridden by protected procedure or entry " &
660 "(RM 9.4(11.9/2))", Typ);
667 procedure Error_Msg_F (Msg : String; N : Node_Id) is
669 Error_Msg_NEL (Msg, N, N, Sloc (First_Node (N)));
676 procedure Error_Msg_FE
679 E : Node_Or_Entity_Id)
682 Error_Msg_NEL (Msg, N, E, Sloc (First_Node (N)));
685 ------------------------
686 -- Error_Msg_Internal --
687 ------------------------
689 procedure Error_Msg_Internal
695 Next_Msg : Error_Msg_Id;
696 -- Pointer to next message at insertion point
698 Prev_Msg : Error_Msg_Id;
699 -- Pointer to previous message at insertion point
701 Temp_Msg : Error_Msg_Id;
704 -- Set if warning to be treated as error
706 procedure Handle_Serious_Error;
707 -- Internal procedure to do all error message handling for a serious
708 -- error message, other than bumping the error counts and arranging
709 -- for the message to be output.
711 --------------------------
712 -- Handle_Serious_Error --
713 --------------------------
715 procedure Handle_Serious_Error is
717 -- Turn off code generation if not done already
719 if Operating_Mode = Generate_Code then
720 Operating_Mode := Check_Semantics;
721 Expander_Active := False;
724 -- Set the fatal error flag in the unit table unless we are in
725 -- Try_Semantics mode. This stops the semantics from being performed
726 -- if we find a serious error. This is skipped if we are currently
727 -- dealing with the configuration pragma file.
729 if not Try_Semantics and then Current_Source_Unit /= No_Unit then
730 Set_Fatal_Error (Get_Source_Unit (Sptr));
732 end Handle_Serious_Error;
734 -- Start of processing for Error_Msg_Internal
737 if Raise_Exception_On_Error /= 0 then
738 raise Error_Msg_Exception;
741 Continuation := Msg_Cont;
742 Continuation_New_Line := False;
743 Suppress_Message := False;
744 Kill_Message := False;
745 Set_Msg_Text (Msg, Sptr);
747 -- Kill continuation if parent message killed
749 if Continuation and Last_Killed then
753 -- Return without doing anything if message is suppressed
756 and then not All_Errors_Mode
757 and then not Is_Warning_Msg
758 and then not Is_Unconditional_Msg
760 if not Continuation then
767 -- Return without doing anything if message is killed and this is not
768 -- the first error message. The philosophy is that if we get a weird
769 -- error message and we already have had a message, then we hope the
770 -- weird message is a junk cascaded message
773 and then not All_Errors_Mode
774 and then Total_Errors_Detected /= 0
776 if not Continuation then
783 -- Special check for warning message to see if it should be output
785 if Is_Warning_Msg then
787 -- Immediate return if warning message and warnings are suppressed
789 if Warnings_Suppressed (Optr) /= No_String
791 Warnings_Suppressed (Sptr) /= No_String
793 Cur_Msg := No_Error_Msg;
797 -- If the flag location is in the main extended source unit then for
798 -- sure we want the warning since it definitely belongs
800 if In_Extended_Main_Source_Unit (Sptr) then
803 -- If the main unit has not been read yet. the warning must be on
804 -- a configuration file: gnat.adc or user-defined. This means we
805 -- are not parsing the main unit yet, so skip following checks.
807 elsif No (Cunit (Main_Unit)) then
810 -- If the flag location is not in the main extended source unit, then
811 -- we want to eliminate the warning, unless it is in the extended
812 -- main code unit and we want warnings on the instance.
814 elsif In_Extended_Main_Code_Unit (Sptr) and then Warn_On_Instance then
817 -- Keep warning if debug flag G set
819 elsif Debug_Flag_GG then
822 -- Keep warning if message text contains !!
824 elsif Has_Double_Exclam then
827 -- Here is where we delete a warning from a with'ed unit
830 Cur_Msg := No_Error_Msg;
832 if not Continuation then
840 -- If message is to be ignored in special ignore message mode, this is
841 -- where we do this special processing, bypassing message output.
843 if Ignore_Errors_Enable > 0 then
844 if Is_Serious_Error then
845 Handle_Serious_Error;
851 -- If error message line length set, and this is a continuation message
852 -- then all we do is to append the text to the text of the last message
853 -- with a comma space separator (eliminating a possible (style) or
856 if Error_Msg_Line_Length /= 0 and then Continuation then
857 Cur_Msg := Errors.Last;
860 Oldm : String_Ptr := Errors.Table (Cur_Msg).Text;
861 Newm : String (1 .. Oldm'Last + 2 + Msglen);
866 -- First copy old message to new one and free it
868 Newm (Oldm'Range) := Oldm.all;
872 -- Remove (style) or info: at start of message
874 if Msglen > 8 and then Msg_Buffer (1 .. 8) = "(style) " then
877 elsif Msglen > 6 and then Msg_Buffer (1 .. 6) = "info: " then
884 -- Now deal with separation between messages. Normally this is
885 -- simply comma space, but there are some special cases.
887 -- If continuation new line, then put actual NL character in msg
889 if Continuation_New_Line then
891 Newm (Newl) := ASCII.LF;
893 -- If continuation message is enclosed in parentheses, then
894 -- special treatment (don't need a comma, and we want to combine
895 -- successive parenthetical remarks into a single one with
896 -- separating commas).
898 elsif Msg_Buffer (M) = '(' and then Msg_Buffer (Msglen) = ')' then
900 -- Case where existing message ends in right paren, remove
901 -- and separate parenthetical remarks with a comma.
903 if Newm (Newl) = ')' then
905 Msg_Buffer (M) := ' ';
907 -- Case where we are adding new parenthetical comment
914 -- Case where continuation not in parens and no new line
917 Newm (Newl + 1 .. Newl + 2) := ", ";
921 -- Append new message
923 Newm (Newl + 1 .. Newl + Msglen - M + 1) :=
924 Msg_Buffer (M .. Msglen);
925 Newl := Newl + Msglen - M + 1;
926 Errors.Table (Cur_Msg).Text := new String'(Newm (1 .. Newl));
928 -- Update warning msg flag and message doc char if needed
930 if Is_Warning_Msg then
931 if not Errors.Table (Cur_Msg).Warn then
932 Errors.Table (Cur_Msg).Warn := True;
933 Errors.Table (Cur_Msg).Warn_Chr := Warning_Msg_Char;
935 elsif Warning_Msg_Char /= ' ' then
936 Errors.Table (Cur_Msg).Warn_Chr := Warning_Msg_Char;
944 -- Here we build a new error object
947 ((Text => new String'(Msg_Buffer (1 .. Msglen)),
948 Next => No_Error_Msg,
949 Prev => No_Error_Msg,
952 Sfile => Get_Source_File_Index (Sptr),
953 Line => Get_Physical_Line_Number (Sptr),
954 Col => Get_Column_Number (Sptr),
955 Warn => Is_Warning_Msg,
957 Warn_Err => False, -- reset below
958 Warn_Chr => Warning_Msg_Char,
959 Style => Is_Style_Msg,
960 Serious => Is_Serious_Error,
961 Uncond => Is_Unconditional_Msg,
962 Msg_Cont => Continuation,
964 Cur_Msg := Errors.Last;
966 -- Test if warning to be treated as error
970 and then (Warning_Treated_As_Error (Msg_Buffer (1 .. Msglen))
972 Warning_Treated_As_Error (Get_Warning_Tag (Cur_Msg)));
974 -- Propagate Warn_Err to this message and preceding continuations
976 for J in reverse 1 .. Errors.Last loop
977 Errors.Table (J).Warn_Err := Warn_Err;
978 exit when not Errors.Table (J).Msg_Cont;
981 -- If immediate errors mode set, output error message now. Also output
982 -- now if the -d1 debug flag is set (so node number message comes out
983 -- just before actual error message)
985 if Debug_Flag_OO or else Debug_Flag_1 then
988 (Errors.Table (Cur_Msg).Line, Errors.Table (Cur_Msg).Sfile, True);
990 Output_Error_Msgs (Temp_Msg);
992 -- If not in immediate errors mode, then we insert the message in the
993 -- error chain for later output by Finalize. The messages are sorted
994 -- first by unit (main unit comes first), and within a unit by source
995 -- location (earlier flag location first in the chain).
998 -- First a quick check, does this belong at the very end of the chain
999 -- of error messages. This saves a lot of time in the normal case if
1000 -- there are lots of messages.
1002 if Last_Error_Msg /= No_Error_Msg
1003 and then Errors.Table (Cur_Msg).Sfile =
1004 Errors.Table (Last_Error_Msg).Sfile
1005 and then (Sptr > Errors.Table (Last_Error_Msg).Sptr
1007 (Sptr = Errors.Table (Last_Error_Msg).Sptr
1009 Optr > Errors.Table (Last_Error_Msg).Optr))
1011 Prev_Msg := Last_Error_Msg;
1012 Next_Msg := No_Error_Msg;
1014 -- Otherwise do a full sequential search for the insertion point
1017 Prev_Msg := No_Error_Msg;
1018 Next_Msg := First_Error_Msg;
1019 while Next_Msg /= No_Error_Msg loop
1021 Errors.Table (Cur_Msg).Sfile < Errors.Table (Next_Msg).Sfile;
1023 if Errors.Table (Cur_Msg).Sfile = Errors.Table (Next_Msg).Sfile
1025 exit when Sptr < Errors.Table (Next_Msg).Sptr
1026 or else (Sptr = Errors.Table (Next_Msg).Sptr
1027 and then Optr < Errors.Table (Next_Msg).Optr);
1030 Prev_Msg := Next_Msg;
1031 Next_Msg := Errors.Table (Next_Msg).Next;
1035 -- Now we insert the new message in the error chain. The insertion
1036 -- point for the message is after Prev_Msg and before Next_Msg.
1038 -- The possible insertion point for the new message is after Prev_Msg
1039 -- and before Next_Msg. However, this is where we do a special check
1040 -- for redundant parsing messages, defined as messages posted on the
1041 -- same line. The idea here is that probably such messages are junk
1042 -- from the parser recovering. In full errors mode, we don't do this
1043 -- deletion, but otherwise such messages are discarded at this stage.
1045 if Prev_Msg /= No_Error_Msg
1046 and then Errors.Table (Prev_Msg).Line =
1047 Errors.Table (Cur_Msg).Line
1048 and then Errors.Table (Prev_Msg).Sfile =
1049 Errors.Table (Cur_Msg).Sfile
1050 and then Compiler_State = Parsing
1051 and then not All_Errors_Mode
1053 -- Don't delete unconditional messages and at this stage, don't
1054 -- delete continuation lines (we attempted to delete those earlier
1055 -- if the parent message was deleted.
1057 if not Errors.Table (Cur_Msg).Uncond
1058 and then not Continuation
1060 -- Don't delete if prev msg is warning and new msg is an error.
1061 -- This is because we don't want a real error masked by a
1062 -- warning. In all other cases (that is parse errors for the
1063 -- same line that are not unconditional) we do delete the
1064 -- message. This helps to avoid junk extra messages from
1065 -- cascaded parsing errors
1067 if not (Errors.Table (Prev_Msg).Warn
1069 Errors.Table (Prev_Msg).Style)
1071 (Errors.Table (Cur_Msg).Warn
1073 Errors.Table (Cur_Msg).Style)
1075 -- All tests passed, delete the message by simply returning
1076 -- without any further processing.
1078 if not Continuation then
1079 Last_Killed := True;
1087 -- Come here if message is to be inserted in the error chain
1089 if not Continuation then
1090 Last_Killed := False;
1093 if Prev_Msg = No_Error_Msg then
1094 First_Error_Msg := Cur_Msg;
1096 Errors.Table (Prev_Msg).Next := Cur_Msg;
1099 Errors.Table (Cur_Msg).Next := Next_Msg;
1101 if Next_Msg = No_Error_Msg then
1102 Last_Error_Msg := Cur_Msg;
1106 -- Bump appropriate statistics count
1108 if Errors.Table (Cur_Msg).Warn or else Errors.Table (Cur_Msg).Style then
1109 Warnings_Detected := Warnings_Detected + 1;
1112 Total_Errors_Detected := Total_Errors_Detected + 1;
1114 if Errors.Table (Cur_Msg).Serious then
1115 Serious_Errors_Detected := Serious_Errors_Detected + 1;
1116 Handle_Serious_Error;
1120 -- If too many warnings turn off warnings
1122 if Maximum_Messages /= 0 then
1123 if Warnings_Detected = Maximum_Messages then
1124 Warning_Mode := Suppress;
1127 -- If too many errors abandon compilation
1129 if Total_Errors_Detected = Maximum_Messages then
1130 raise Unrecoverable_Error;
1133 end Error_Msg_Internal;
1139 procedure Error_Msg_N (Msg : String; N : Node_Or_Entity_Id) is
1141 Error_Msg_NEL (Msg, N, N, Sloc (N));
1148 procedure Error_Msg_NE
1150 N : Node_Or_Entity_Id;
1151 E : Node_Or_Entity_Id)
1154 Error_Msg_NEL (Msg, N, E, Sloc (N));
1161 procedure Error_Msg_NEL
1163 N : Node_Or_Entity_Id;
1164 E : Node_Or_Entity_Id;
1165 Flag_Location : Source_Ptr)
1168 if Special_Msg_Delete (Msg, N, E) then
1172 Prescan_Message (Msg);
1174 -- Special handling for warning messages
1176 if Is_Warning_Msg then
1178 -- Suppress if no warnings set for either entity or node
1180 if No_Warnings (N) or else No_Warnings (E) then
1182 -- Disable any continuation messages as well
1184 Last_Killed := True;
1188 -- Suppress if inside loop that is known to be null or is probably
1189 -- null (case where loop executes only if invalid values present).
1190 -- In either case warnings in the loop are likely to be junk.
1197 while Present (P) loop
1198 if Nkind (P) = N_Loop_Statement
1199 and then Suppress_Loop_Warnings (P)
1209 -- Test for message to be output
1212 or else Is_Unconditional_Msg
1213 or else Is_Warning_Msg
1215 or else (Msg (Msg'First) = '\' and then not Last_Killed)
1218 Error_Msg_Node_1 := E;
1219 Error_Msg (Msg, Flag_Location);
1222 Last_Killed := True;
1225 if not (Is_Warning_Msg or Is_Style_Msg) then
1234 procedure Error_Msg_NW
1237 N : Node_Or_Entity_Id)
1241 and then In_Extended_Main_Source_Unit (N)
1242 and then Comes_From_Source (N)
1244 Error_Msg_NEL (Msg, N, N, Sloc (N));
1252 procedure Error_Msg_S (Msg : String) is
1254 Error_Msg (Msg, Scan_Ptr);
1261 procedure Error_Msg_SC (Msg : String) is
1263 -- If we are at end of file, post the flag after the previous token
1265 if Token = Tok_EOF then
1268 -- For all other cases the message is posted at the current token
1272 Error_Msg (Msg, Token_Ptr);
1280 procedure Error_Msg_SP (Msg : String) is
1282 -- Note: in the case where there is no previous token, Prev_Token_Ptr
1283 -- is set to Source_First, which is a reasonable position for the
1284 -- error flag in this situation
1286 Error_Msg (Msg, Prev_Token_Ptr);
1293 procedure Finalize (Last_Call : Boolean) is
1298 procedure Delete_Warning (E : Error_Msg_Id);
1299 -- Delete a message if not already deleted and adjust warning count
1301 --------------------
1302 -- Delete_Warning --
1303 --------------------
1305 procedure Delete_Warning (E : Error_Msg_Id) is
1307 if not Errors.Table (E).Deleted then
1308 Errors.Table (E).Deleted := True;
1309 Warnings_Detected := Warnings_Detected - 1;
1313 -- Start of message for Finalize
1316 -- Set Prev pointers
1318 Cur := First_Error_Msg;
1319 while Cur /= No_Error_Msg loop
1320 Nxt := Errors.Table (Cur).Next;
1321 exit when Nxt = No_Error_Msg;
1322 Errors.Table (Nxt).Prev := Cur;
1326 -- Eliminate any duplicated error messages from the list. This is
1327 -- done after the fact to avoid problems with Change_Error_Text.
1329 Cur := First_Error_Msg;
1330 while Cur /= No_Error_Msg loop
1331 Nxt := Errors.Table (Cur).Next;
1334 while F /= No_Error_Msg
1335 and then Errors.Table (F).Sptr = Errors.Table (Cur).Sptr
1337 Check_Duplicate_Message (Cur, F);
1338 F := Errors.Table (F).Next;
1344 -- Mark any messages suppressed by specific warnings as Deleted
1346 Cur := First_Error_Msg;
1347 while Cur /= No_Error_Msg loop
1349 CE : Error_Msg_Object renames Errors.Table (Cur);
1350 Tag : constant String := Get_Warning_Tag (Cur);
1353 if (CE.Warn and not CE.Deleted)
1355 (Warning_Specifically_Suppressed (CE.Sptr, CE.Text, Tag) /=
1358 Warning_Specifically_Suppressed (CE.Optr, CE.Text, Tag) /=
1361 Delete_Warning (Cur);
1363 -- If this is a continuation, delete previous messages
1366 while Errors.Table (F).Msg_Cont loop
1367 F := Errors.Table (F).Prev;
1371 -- Delete any following continuations
1375 F := Errors.Table (F).Next;
1376 exit when F = No_Error_Msg;
1377 exit when not Errors.Table (F).Msg_Cont;
1383 Cur := Errors.Table (Cur).Next;
1386 Finalize_Called := True;
1388 -- Check consistency of specific warnings (may add warnings). We only
1389 -- do this on the last call, after all possible warnings are posted.
1392 Validate_Specific_Warnings (Error_Msg'Access);
1400 function First_Node (C : Node_Id) return Node_Id is
1401 Orig : constant Node_Id := Original_Node (C);
1402 Loc : constant Source_Ptr := Sloc (Orig);
1403 Sfile : constant Source_File_Index := Get_Source_File_Index (Loc);
1407 function Test_Earlier (N : Node_Id) return Traverse_Result;
1408 -- Function applied to every node in the construct
1410 procedure Search_Tree_First is new Traverse_Proc (Test_Earlier);
1411 -- Create traversal procedure
1417 function Test_Earlier (N : Node_Id) return Traverse_Result is
1418 Norig : constant Node_Id := Original_Node (N);
1419 Loc : constant Source_Ptr := Sloc (Norig);
1422 -- Check for earlier
1426 -- Ignore nodes with no useful location information
1428 and then Loc /= Standard_Location
1429 and then Loc /= No_Location
1431 -- Ignore nodes from a different file. This ensures against cases
1432 -- of strange foreign code somehow being present. We don't want
1433 -- wild placement of messages if that happens.
1435 and then Get_Source_File_Index (Loc) = Sfile
1444 -- Start of processing for First_Node
1447 if Nkind (Orig) in N_Subexpr then
1450 Search_Tree_First (Orig);
1462 function First_Sloc (N : Node_Id) return Source_Ptr is
1463 SI : constant Source_File_Index := Source_Index (Get_Source_Unit (N));
1464 SF : constant Source_Ptr := Source_First (SI);
1469 F := First_Node (N);
1472 -- The following circuit is a bit subtle. When we have parenthesized
1473 -- expressions, then the Sloc will not record the location of the paren,
1474 -- but we would like to post the flag on the paren. So what we do is to
1475 -- crawl up the tree from the First_Node, adjusting the Sloc value for
1476 -- any parentheses we know are present. Yes, we know this circuit is not
1477 -- 100% reliable (e.g. because we don't record all possible paren level
1478 -- values), but this is only for an error message so it is good enough.
1481 Paren_Loop : for J in 1 .. Paren_Count (F) loop
1483 -- We don't look more than 12 characters behind the current
1484 -- location, and in any case not past the front of the source.
1486 Search_Loop : for K in 1 .. 12 loop
1487 exit Search_Loop when S = SF;
1489 if Source_Text (SI) (S - 1) = '(' then
1493 elsif Source_Text (SI) (S - 1) <= ' ' then
1499 end loop Search_Loop;
1500 end loop Paren_Loop;
1502 exit Node_Loop when F = N;
1504 exit Node_Loop when Nkind (F) not in N_Subexpr;
1510 -----------------------
1511 -- Get_Ignore_Errors --
1512 -----------------------
1514 function Get_Ignore_Errors return Boolean is
1516 return Errors_Must_Be_Ignored;
1517 end Get_Ignore_Errors;
1523 procedure Initialize is
1526 First_Error_Msg := No_Error_Msg;
1527 Last_Error_Msg := No_Error_Msg;
1528 Serious_Errors_Detected := 0;
1529 Total_Errors_Detected := 0;
1530 Warnings_Treated_As_Errors := 0;
1531 Warnings_Detected := 0;
1532 Warnings_As_Errors_Count := 0;
1533 Cur_Msg := No_Error_Msg;
1536 -- Initialize warnings tables
1539 Specific_Warnings.Init;
1546 function No_Warnings (N : Node_Or_Entity_Id) return Boolean is
1548 if Error_Posted (N) then
1551 elsif Nkind (N) in N_Entity and then Has_Warnings_Off (N) then
1554 elsif Is_Entity_Name (N)
1555 and then Present (Entity (N))
1556 and then Has_Warnings_Off (Entity (N))
1569 function OK_Node (N : Node_Id) return Boolean is
1570 K : constant Node_Kind := Nkind (N);
1573 if Error_Posted (N) then
1576 elsif K in N_Has_Etype
1577 and then Present (Etype (N))
1578 and then Error_Posted (Etype (N))
1583 or else K = N_Attribute_Reference
1584 or else K = N_Character_Literal
1585 or else K = N_Expanded_Name
1586 or else K = N_Identifier
1587 or else K = N_Operator_Symbol)
1588 and then Present (Entity (N))
1589 and then Error_Posted (Entity (N))
1597 ---------------------
1598 -- Output_Messages --
1599 ---------------------
1601 procedure Output_Messages is
1605 procedure Write_Error_Summary;
1606 -- Write error summary
1608 procedure Write_Header (Sfile : Source_File_Index);
1609 -- Write header line (compiling or checking given file)
1611 procedure Write_Max_Errors;
1612 -- Write message if max errors reached
1614 -------------------------
1615 -- Write_Error_Summary --
1616 -------------------------
1618 procedure Write_Error_Summary is
1620 -- Extra blank line if error messages or source listing were output
1622 if Total_Errors_Detected + Warnings_Detected > 0
1628 -- Message giving number of lines read and number of errors detected.
1629 -- This normally goes to Standard_Output. The exception is when brief
1630 -- mode is not set, verbose mode (or full list mode) is set, and
1631 -- there are errors. In this case we send the message to standard
1632 -- error to make sure that *something* appears on standard error in
1633 -- an error situation.
1635 -- Formerly, only the "# errors" suffix was sent to stderr, whereas
1636 -- "# lines:" appeared on stdout. This caused problems on VMS when
1637 -- the stdout buffer was flushed, giving an extra line feed after
1640 if Total_Errors_Detected + Warnings_Detected /= 0
1641 and then not Brief_Output
1642 and then (Verbose_Mode or Full_List)
1647 -- Message giving total number of lines. Don't give this message if
1648 -- the Main_Source line is unknown (this happens in error situations,
1649 -- e.g. when integrated preprocessing fails).
1651 if Main_Source_File /= No_Source_File then
1653 Write_Int (Num_Source_Lines (Main_Source_File));
1655 if Num_Source_Lines (Main_Source_File) = 1 then
1656 Write_Str (" line: ");
1658 Write_Str (" lines: ");
1662 if Total_Errors_Detected = 0 then
1663 Write_Str ("No errors");
1665 elsif Total_Errors_Detected = 1 then
1666 Write_Str ("1 error");
1669 Write_Int (Total_Errors_Detected);
1670 Write_Str (" errors");
1673 if Warnings_Detected /= 0 then
1675 Write_Int (Warnings_Detected);
1676 Write_Str (" warning");
1678 if Warnings_Detected /= 1 then
1682 if Warning_Mode = Treat_As_Error then
1683 Write_Str (" (treated as error");
1685 if Warnings_Detected /= 1 then
1691 elsif Warnings_Treated_As_Errors /= 0 then
1693 Write_Int (Warnings_Treated_As_Errors);
1694 Write_Str (" treated as errors)");
1699 Set_Standard_Output;
1700 end Write_Error_Summary;
1706 procedure Write_Header (Sfile : Source_File_Index) is
1708 if Verbose_Mode or Full_List then
1709 if Original_Operating_Mode = Generate_Code then
1710 Write_Str ("Compiling: ");
1712 Write_Str ("Checking: ");
1715 Write_Name (Full_File_Name (Sfile));
1717 if not Debug_Flag_7 then
1718 Write_Str (" (source file time stamp: ");
1719 Write_Time_Stamp (Sfile);
1727 ----------------------
1728 -- Write_Max_Errors --
1729 ----------------------
1731 procedure Write_Max_Errors is
1733 if Maximum_Messages /= 0 then
1734 if Warnings_Detected >= Maximum_Messages then
1736 Write_Line ("maximum number of warnings output");
1737 Write_Line ("any further warnings suppressed");
1738 Set_Standard_Output;
1741 -- If too many errors print message
1743 if Total_Errors_Detected >= Maximum_Messages then
1745 Write_Line ("fatal error: maximum number of errors detected");
1746 Set_Standard_Output;
1749 end Write_Max_Errors;
1751 -- Start of processing for Output_Messages
1754 -- Error if Finalize has not been called
1756 if not Finalize_Called then
1757 raise Program_Error;
1760 -- Reset current error source file if the main unit has a pragma
1761 -- Source_Reference. This ensures outputting the proper name of
1762 -- the source file in this situation.
1764 if Main_Source_File = No_Source_File
1765 or else Num_SRef_Pragmas (Main_Source_File) /= 0
1767 Current_Error_Source_File := No_Source_File;
1772 if Brief_Output or (not Full_List and not Verbose_Mode) then
1775 E := First_Error_Msg;
1776 while E /= No_Error_Msg loop
1777 if not Errors.Table (E).Deleted and then not Debug_Flag_KK then
1778 if Full_Path_Name_For_Brief_Errors then
1779 Write_Name (Full_Ref_Name (Errors.Table (E).Sfile));
1781 Write_Name (Reference_Name (Errors.Table (E).Sfile));
1785 Write_Int (Int (Physical_To_Logical
1786 (Errors.Table (E).Line,
1787 Errors.Table (E).Sfile)));
1790 if Errors.Table (E).Col < 10 then
1794 Write_Int (Int (Errors.Table (E).Col));
1796 Output_Msg_Text (E);
1800 E := Errors.Table (E).Next;
1803 Set_Standard_Output;
1806 -- Full source listing case
1809 List_Pragmas_Index := 1;
1810 List_Pragmas_Mode := True;
1811 E := First_Error_Msg;
1813 -- Normal case, to stdout (copyright notice already output)
1815 if Full_List_File_Name = null then
1816 if not Debug_Flag_7 then
1823 Create_List_File_Access.all (Full_List_File_Name.all);
1824 Set_Special_Output (Write_List_Info_Access.all'Access);
1826 -- Write copyright notice to file
1828 if not Debug_Flag_7 then
1829 Write_Str ("GNAT ");
1830 Write_Str (Gnat_Version_String);
1832 Write_Str ("Copyright 1992-" &
1834 ", Free Software Foundation, Inc.");
1839 -- First list extended main source file units with errors
1841 for U in Main_Unit .. Last_Unit loop
1842 if In_Extended_Main_Source_Unit (Cunit_Entity (U))
1844 -- If debug flag d.m is set, only the main source is listed
1846 and then (U = Main_Unit or else not Debug_Flag_Dot_M)
1848 -- If the unit of the entity does not come from source, it is
1849 -- an implicit subprogram declaration for a child subprogram.
1850 -- Do not emit errors for it, they are listed with the body.
1853 (No (Cunit_Entity (U))
1854 or else Comes_From_Source (Cunit_Entity (U))
1855 or else not Is_Subprogram (Cunit_Entity (U)))
1858 Sfile : constant Source_File_Index := Source_Index (U);
1863 -- Only write the header if Sfile is known
1865 if Sfile /= No_Source_File then
1866 Write_Header (Sfile);
1870 -- Normally, we don't want an "error messages from file"
1871 -- message when listing the entire file, so we set the
1872 -- current source file as the current error source file.
1873 -- However, the old style of doing things was to list this
1874 -- message if pragma Source_Reference is present, even for
1875 -- the main unit. Since the purpose of the -gnatd.m switch
1876 -- is to duplicate the old behavior, we skip the reset if
1877 -- this debug flag is set.
1879 if not Debug_Flag_Dot_M then
1880 Current_Error_Source_File := Sfile;
1883 -- Only output the listing if Sfile is known, to avoid
1884 -- crashing the compiler.
1886 if Sfile /= No_Source_File then
1887 for N in 1 .. Last_Source_Line (Sfile) loop
1888 while E /= No_Error_Msg
1889 and then Errors.Table (E).Deleted
1891 E := Errors.Table (E).Next;
1896 and then Errors.Table (E).Line = N
1897 and then Errors.Table (E).Sfile = Sfile;
1899 Output_Source_Line (N, Sfile, Err_Flag);
1902 Output_Error_Msgs (E);
1904 if not Debug_Flag_2 then
1914 -- Then output errors, if any, for subsidiary units not in the
1915 -- main extended unit.
1917 -- Note: if debug flag d.m set, include errors for any units other
1918 -- than the main unit in the extended source unit (e.g. spec and
1919 -- subunits for a body).
1921 while E /= No_Error_Msg
1922 and then (not In_Extended_Main_Source_Unit (Errors.Table (E).Sptr)
1925 and then Get_Source_Unit
1926 (Errors.Table (E).Sptr) /= Main_Unit))
1928 if Errors.Table (E).Deleted then
1929 E := Errors.Table (E).Next;
1934 (Errors.Table (E).Line, Errors.Table (E).Sfile, True);
1935 Output_Error_Msgs (E);
1939 -- If output to file, write extra copy of error summary to the
1940 -- output file, and then close it.
1942 if Full_List_File_Name /= null then
1943 Write_Error_Summary;
1945 Close_List_File_Access.all;
1946 Cancel_Special_Output;
1950 -- Verbose mode (error lines only with error flags). Normally this is
1951 -- ignored in full list mode, unless we are listing to a file, in which
1952 -- case we still generate -gnatv output to standard output.
1955 and then (not Full_List or else Full_List_File_Name /= null)
1959 -- Output the header only when Main_Source_File is known
1961 if Main_Source_File /= No_Source_File then
1962 Write_Header (Main_Source_File);
1965 E := First_Error_Msg;
1967 -- Loop through error lines
1969 while E /= No_Error_Msg loop
1970 if Errors.Table (E).Deleted then
1971 E := Errors.Table (E).Next;
1975 (Errors.Table (E).Line, Errors.Table (E).Sfile, True);
1976 Output_Error_Msgs (E);
1981 -- Output error summary if verbose or full list mode
1983 if Verbose_Mode or else Full_List then
1984 Write_Error_Summary;
1989 if Warning_Mode = Treat_As_Error then
1990 Total_Errors_Detected := Total_Errors_Detected + Warnings_Detected;
1991 Warnings_Detected := 0;
1993 end Output_Messages;
1995 ------------------------
1996 -- Output_Source_Line --
1997 ------------------------
1999 procedure Output_Source_Line
2000 (L : Physical_Line_Number;
2001 Sfile : Source_File_Index;
2007 Line_Number_Output : Boolean := False;
2008 -- Set True once line number is output
2010 Empty_Line : Boolean := True;
2011 -- Set False if line includes at least one character
2014 if Sfile /= Current_Error_Source_File then
2015 Write_Str ("==============Error messages for ");
2017 case Sinput.File_Type (Sfile) is
2019 Write_Str ("source");
2021 when Sinput.Config =>
2022 Write_Str ("configuration pragmas");
2025 Write_Str ("symbol definition");
2027 when Sinput.Preproc =>
2028 Write_Str ("preprocessing data");
2031 Write_Str (" file: ");
2032 Write_Name (Full_File_Name (Sfile));
2035 if Num_SRef_Pragmas (Sfile) > 0 then
2036 Write_Str ("--------------Line numbers from file: ");
2037 Write_Name (Full_Ref_Name (Sfile));
2038 Write_Str (" (starting at line ");
2039 Write_Int (Int (First_Mapped_Line (Sfile)));
2044 Current_Error_Source_File := Sfile;
2047 if Errs or List_Pragmas_Mode then
2048 Output_Line_Number (Physical_To_Logical (L, Sfile));
2049 Line_Number_Output := True;
2052 S := Line_Start (L, Sfile);
2055 C := Source_Text (Sfile) (S);
2056 exit when C = ASCII.LF or else C = ASCII.CR or else C = EOF;
2058 -- Deal with matching entry in List_Pragmas table
2061 and then List_Pragmas_Index <= List_Pragmas.Last
2062 and then S = List_Pragmas.Table (List_Pragmas_Index).Ploc
2064 case List_Pragmas.Table (List_Pragmas_Index).Ptyp is
2068 -- Ignore if on line with errors so that error flags
2069 -- get properly listed with the error line .
2072 Write_Char (ASCII.FF);
2076 List_Pragmas_Mode := True;
2078 if not Line_Number_Output then
2079 Output_Line_Number (Physical_To_Logical (L, Sfile));
2080 Line_Number_Output := True;
2087 List_Pragmas_Mode := False;
2090 List_Pragmas_Index := List_Pragmas_Index + 1;
2092 -- Normal case (no matching entry in List_Pragmas table)
2095 if Errs or List_Pragmas_Mode then
2100 Empty_Line := False;
2104 -- If we have output a source line, then add the line terminator, with
2105 -- training spaces preserved (so we output the line exactly as input).
2107 if Line_Number_Output then
2111 Write_Eol_Keep_Blanks;
2114 end Output_Source_Line;
2116 -----------------------------
2117 -- Remove_Warning_Messages --
2118 -----------------------------
2120 procedure Remove_Warning_Messages (N : Node_Id) is
2122 function Check_For_Warning (N : Node_Id) return Traverse_Result;
2123 -- This function checks one node for a possible warning message
2125 function Check_All_Warnings is new Traverse_Func (Check_For_Warning);
2126 -- This defines the traversal operation
2128 -----------------------
2129 -- Check_For_Warning --
2130 -----------------------
2132 function Check_For_Warning (N : Node_Id) return Traverse_Result is
2133 Loc : constant Source_Ptr := Sloc (N);
2136 function To_Be_Removed (E : Error_Msg_Id) return Boolean;
2137 -- Returns True for a message that is to be removed. Also adjusts
2138 -- warning count appropriately.
2144 function To_Be_Removed (E : Error_Msg_Id) return Boolean is
2146 if E /= No_Error_Msg
2148 -- Don't remove if location does not match
2150 and then Errors.Table (E).Optr = Loc
2152 -- Don't remove if not warning/info message. Note that we do
2153 -- not remove style messages here. They are warning messages
2154 -- but not ones we want removed in this context.
2156 and then Errors.Table (E).Warn
2158 -- Don't remove unconditional messages
2160 and then not Errors.Table (E).Uncond
2162 Warnings_Detected := Warnings_Detected - 1;
2165 -- No removal required
2172 -- Start of processing for Check_For_Warnings
2175 while To_Be_Removed (First_Error_Msg) loop
2176 First_Error_Msg := Errors.Table (First_Error_Msg).Next;
2179 if First_Error_Msg = No_Error_Msg then
2180 Last_Error_Msg := No_Error_Msg;
2183 E := First_Error_Msg;
2184 while E /= No_Error_Msg loop
2185 while To_Be_Removed (Errors.Table (E).Next) loop
2186 Errors.Table (E).Next :=
2187 Errors.Table (Errors.Table (E).Next).Next;
2189 if Errors.Table (E).Next = No_Error_Msg then
2190 Last_Error_Msg := E;
2194 E := Errors.Table (E).Next;
2197 if Nkind (N) = N_Raise_Constraint_Error
2198 and then Original_Node (N) /= N
2199 and then No (Condition (N))
2201 -- Warnings may have been posted on subexpressions of the original
2202 -- tree. We place the original node back on the tree to remove
2203 -- those warnings, whose sloc do not match those of any node in
2204 -- the current tree. Given that we are in unreachable code, this
2205 -- modification to the tree is harmless.
2208 Status : Traverse_Final_Result;
2211 if Is_List_Member (N) then
2212 Set_Condition (N, Original_Node (N));
2213 Status := Check_All_Warnings (Condition (N));
2215 Rewrite (N, Original_Node (N));
2216 Status := Check_All_Warnings (N);
2225 end Check_For_Warning;
2227 -- Start of processing for Remove_Warning_Messages
2230 if Warnings_Detected /= 0 then
2232 Discard : Traverse_Final_Result;
2233 pragma Warnings (Off, Discard);
2236 Discard := Check_All_Warnings (N);
2239 end Remove_Warning_Messages;
2241 procedure Remove_Warning_Messages (L : List_Id) is
2244 if Is_Non_Empty_List (L) then
2246 while Present (Stat) loop
2247 Remove_Warning_Messages (Stat);
2251 end Remove_Warning_Messages;
2253 ---------------------------
2254 -- Set_Identifier_Casing --
2255 ---------------------------
2257 procedure Set_Identifier_Casing
2258 (Identifier_Name : System.Address;
2259 File_Name : System.Address)
2261 Ident : constant Big_String_Ptr := To_Big_String_Ptr (Identifier_Name);
2262 File : constant Big_String_Ptr := To_Big_String_Ptr (File_Name);
2265 Desired_Case : Casing_Type := Mixed_Case;
2266 -- Casing required for result. Default value of Mixed_Case is used if
2267 -- for some reason we cannot find the right file name in the table.
2270 -- Get length of file name
2273 while File (Flen + 1) /= ASCII.NUL loop
2277 -- Loop through file names to find matching one. This is a bit slow, but
2278 -- we only do it in error situations so it is not so terrible. Note that
2279 -- if the loop does not exit, then the desired case will be left set to
2280 -- Mixed_Case, this can happen if the name was not in canonical form,
2281 -- and gets canonicalized on VMS. Possibly we could fix this by
2282 -- unconditionally canonicalizing these names ???
2284 for J in 1 .. Last_Source_File loop
2285 Get_Name_String (Full_Debug_Name (J));
2288 and then Name_Buffer (1 .. Name_Len) = String (File (1 .. Flen))
2290 Desired_Case := Identifier_Casing (J);
2295 -- Copy identifier as given to Name_Buffer
2297 for J in Name_Buffer'Range loop
2298 Name_Buffer (J) := Ident (J);
2300 if Name_Buffer (J) = ASCII.NUL then
2306 Set_Casing (Desired_Case);
2307 end Set_Identifier_Casing;
2309 -----------------------
2310 -- Set_Ignore_Errors --
2311 -----------------------
2313 procedure Set_Ignore_Errors (To : Boolean) is
2315 Errors_Must_Be_Ignored := To;
2316 end Set_Ignore_Errors;
2318 ------------------------------
2319 -- Set_Msg_Insertion_Column --
2320 ------------------------------
2322 procedure Set_Msg_Insertion_Column is
2324 if RM_Column_Check then
2325 Set_Msg_Str (" in column ");
2326 Set_Msg_Int (Int (Error_Msg_Col) + 1);
2328 end Set_Msg_Insertion_Column;
2330 ----------------------------
2331 -- Set_Msg_Insertion_Node --
2332 ----------------------------
2334 procedure Set_Msg_Insertion_Node is
2339 Error_Msg_Node_1 = Error
2340 or else Error_Msg_Node_1 = Any_Type;
2342 if Error_Msg_Node_1 = Empty then
2343 Set_Msg_Blank_Conditional;
2344 Set_Msg_Str ("<empty>");
2346 elsif Error_Msg_Node_1 = Error then
2348 Set_Msg_Str ("<error>");
2350 elsif Error_Msg_Node_1 = Standard_Void_Type then
2352 Set_Msg_Str ("procedure name");
2354 elsif Nkind (Error_Msg_Node_1) in N_Entity
2355 and then Ekind (Error_Msg_Node_1) = E_Anonymous_Access_Subprogram_Type
2358 Set_Msg_Str ("access to subprogram");
2361 Set_Msg_Blank_Conditional;
2365 K := Nkind (Error_Msg_Node_1);
2367 -- If we have operator case, skip quotes since name of operator
2368 -- itself will supply the required quotations. An operator can be an
2369 -- applied use in an expression or an explicit operator symbol, or an
2370 -- identifier whose name indicates it is an operator.
2373 or else K = N_Operator_Symbol
2374 or else K = N_Defining_Operator_Symbol
2375 or else ((K = N_Identifier or else K = N_Defining_Identifier)
2376 and then Is_Operator_Name (Chars (Error_Msg_Node_1)))
2378 Set_Msg_Node (Error_Msg_Node_1);
2380 -- Normal case, not an operator, surround with quotes
2384 Set_Qualification (Error_Msg_Qual_Level, Error_Msg_Node_1);
2385 Set_Msg_Node (Error_Msg_Node_1);
2390 -- The following assignment ensures that a second ampersand insertion
2391 -- character will correspond to the Error_Msg_Node_2 parameter. We
2392 -- suppress possible validity checks in case operating in -gnatVa mode,
2393 -- and Error_Msg_Node_2 is not needed and has not been set.
2396 pragma Suppress (Range_Check);
2398 Error_Msg_Node_1 := Error_Msg_Node_2;
2400 end Set_Msg_Insertion_Node;
2402 --------------------------------------
2403 -- Set_Msg_Insertion_Type_Reference --
2404 --------------------------------------
2406 procedure Set_Msg_Insertion_Type_Reference (Flag : Source_Ptr) is
2412 if Error_Msg_Node_1 = Standard_Void_Type then
2413 Set_Msg_Str ("package or procedure name");
2416 elsif Error_Msg_Node_1 = Standard_Exception_Type then
2417 Set_Msg_Str ("exception name");
2420 elsif Error_Msg_Node_1 = Any_Access
2421 or else Error_Msg_Node_1 = Any_Array
2422 or else Error_Msg_Node_1 = Any_Boolean
2423 or else Error_Msg_Node_1 = Any_Character
2424 or else Error_Msg_Node_1 = Any_Composite
2425 or else Error_Msg_Node_1 = Any_Discrete
2426 or else Error_Msg_Node_1 = Any_Fixed
2427 or else Error_Msg_Node_1 = Any_Integer
2428 or else Error_Msg_Node_1 = Any_Modular
2429 or else Error_Msg_Node_1 = Any_Numeric
2430 or else Error_Msg_Node_1 = Any_Real
2431 or else Error_Msg_Node_1 = Any_Scalar
2432 or else Error_Msg_Node_1 = Any_String
2434 Get_Unqualified_Decoded_Name_String (Chars (Error_Msg_Node_1));
2435 Set_Msg_Name_Buffer;
2438 elsif Error_Msg_Node_1 = Universal_Real then
2439 Set_Msg_Str ("type universal real");
2442 elsif Error_Msg_Node_1 = Universal_Integer then
2443 Set_Msg_Str ("type universal integer");
2446 elsif Error_Msg_Node_1 = Universal_Fixed then
2447 Set_Msg_Str ("type universal fixed");
2451 -- Special case of anonymous array
2453 if Nkind (Error_Msg_Node_1) in N_Entity
2454 and then Is_Array_Type (Error_Msg_Node_1)
2455 and then Present (Related_Array_Object (Error_Msg_Node_1))
2457 Set_Msg_Str ("type of ");
2458 Set_Msg_Node (Related_Array_Object (Error_Msg_Node_1));
2459 Set_Msg_Str (" declared");
2460 Set_Msg_Insertion_Line_Number
2461 (Sloc (Related_Array_Object (Error_Msg_Node_1)), Flag);
2465 -- If we fall through, it is not a special case, so first output
2466 -- the name of the type, preceded by private for a private type
2468 if Is_Private_Type (Error_Msg_Node_1) then
2469 Set_Msg_Str ("private type ");
2471 Set_Msg_Str ("type ");
2474 Ent := Error_Msg_Node_1;
2476 if Is_Internal_Name (Chars (Ent)) then
2477 Unwind_Internal_Type (Ent);
2480 -- Types in Standard are displayed as "Standard.name"
2482 if Sloc (Ent) <= Standard_Location then
2484 Set_Msg_Str ("Standard.");
2489 -- Types in other language defined units are displayed as
2490 -- "package-name.type-name"
2493 Is_Predefined_File_Name (Unit_File_Name (Get_Source_Unit (Ent)))
2495 Get_Unqualified_Decoded_Name_String
2496 (Unit_Name (Get_Source_Unit (Ent)));
2497 Name_Len := Name_Len - 2;
2498 Set_Msg_Blank_Conditional;
2500 Set_Casing (Mixed_Case);
2501 Set_Msg_Name_Buffer;
2503 Set_Casing (Mixed_Case);
2508 -- All other types display as "type name" defined at line xxx
2509 -- possibly qualified if qualification is requested.
2513 Set_Qualification (Error_Msg_Qual_Level, Ent);
2517 -- If we did not print a name (e.g. in the case of an anonymous
2518 -- subprogram type), there is no name to print, so remove quotes.
2520 if Buffer_Ends_With ('"') then
2521 Buffer_Remove ('"');
2527 -- If the original type did not come from a predefined file, add the
2528 -- location where the type was defined.
2530 if Sloc (Error_Msg_Node_1) > Standard_Location
2532 not Is_Predefined_File_Name
2533 (Unit_File_Name (Get_Source_Unit (Error_Msg_Node_1)))
2535 Set_Msg_Str (" defined");
2536 Set_Msg_Insertion_Line_Number (Sloc (Error_Msg_Node_1), Flag);
2538 -- If it did come from a predefined file, deal with the case where
2539 -- this was a file with a generic instantiation from elsewhere.
2542 if Sloc (Error_Msg_Node_1) > Standard_Location then
2544 Iloc : constant Source_Ptr :=
2545 Instantiation_Location (Sloc (Error_Msg_Node_1));
2548 if Iloc /= No_Location
2549 and then not Suppress_Instance_Location
2551 Set_Msg_Str (" from instance");
2552 Set_Msg_Insertion_Line_Number (Iloc, Flag);
2557 end Set_Msg_Insertion_Type_Reference;
2559 ---------------------------------
2560 -- Set_Msg_Insertion_Unit_Name --
2561 ---------------------------------
2563 procedure Set_Msg_Insertion_Unit_Name (Suffix : Boolean := True) is
2565 if Error_Msg_Unit_1 = No_Unit_Name then
2568 elsif Error_Msg_Unit_1 = Error_Unit_Name then
2570 Set_Msg_Str ("<error>");
2573 Get_Unit_Name_String (Error_Msg_Unit_1, Suffix);
2576 Set_Msg_Name_Buffer;
2580 -- The following assignment ensures that a second percent insertion
2581 -- character will correspond to the Error_Msg_Unit_2 parameter. We
2582 -- suppress possible validity checks in case operating in -gnatVa mode,
2583 -- and Error_Msg_Unit_2 is not needed and has not been set.
2586 pragma Suppress (Range_Check);
2588 Error_Msg_Unit_1 := Error_Msg_Unit_2;
2590 end Set_Msg_Insertion_Unit_Name;
2596 procedure Set_Msg_Node (Node : Node_Id) is
2601 case Nkind (Node) is
2602 when N_Designator =>
2603 Set_Msg_Node (Name (Node));
2605 Set_Msg_Node (Identifier (Node));
2608 when N_Defining_Program_Unit_Name =>
2609 Set_Msg_Node (Name (Node));
2611 Set_Msg_Node (Defining_Identifier (Node));
2614 when N_Selected_Component | N_Expanded_Name =>
2615 Set_Msg_Node (Prefix (Node));
2617 Set_Msg_Node (Selector_Name (Node));
2624 -- The only remaining possibilities are identifiers, defining
2625 -- identifiers, pragmas, and pragma argument associations.
2627 if Nkind (Node) = N_Pragma then
2628 Nam := Pragma_Name (Node);
2630 -- The other cases have Chars fields, and we want to test for possible
2631 -- internal names, which generally represent something gone wrong. An
2632 -- exception is the case of internal type names, where we try to find a
2633 -- reasonable external representation for the external name
2635 elsif Is_Internal_Name (Chars (Node))
2637 ((Is_Entity_Name (Node)
2638 and then Present (Entity (Node))
2639 and then Is_Type (Entity (Node)))
2641 (Nkind (Node) = N_Defining_Identifier and then Is_Type (Node)))
2643 if Nkind (Node) = N_Identifier then
2644 Ent := Entity (Node);
2649 -- If the type is the designated type of an access_to_subprogram,
2650 -- then there is no name to provide in the call.
2652 if Ekind (Ent) = E_Subprogram_Type then
2655 -- Otherwise, we will be able to find some kind of name to output
2658 Unwind_Internal_Type (Ent);
2662 -- If not internal name, just use name in Chars field
2665 Nam := Chars (Node);
2668 -- At this stage, the name to output is in Nam
2670 Get_Unqualified_Decoded_Name_String (Nam);
2672 -- Remove trailing upper case letters from the name (useful for
2673 -- dealing with some cases of internal names.
2675 while Name_Len > 1 and then Name_Buffer (Name_Len) in 'A' .. 'Z' loop
2676 Name_Len := Name_Len - 1;
2679 -- If we have any of the names from standard that start with the
2680 -- characters "any " (e.g. Any_Type), then kill the message since
2681 -- almost certainly it is a junk cascaded message.
2684 and then Name_Buffer (1 .. 4) = "any "
2686 Kill_Message := True;
2689 -- Now we have to set the proper case. If we have a source location
2690 -- then do a check to see if the name in the source is the same name
2691 -- as the name in the Names table, except for possible differences
2692 -- in case, which is the case when we can copy from the source.
2695 Src_Loc : constant Source_Ptr := Sloc (Node);
2696 Sbuffer : Source_Buffer_Ptr;
2698 Src_Ptr : Source_Ptr;
2704 -- For standard locations, always use mixed case
2706 if Src_Loc <= No_Location
2707 or else Sloc (Node) <= No_Location
2709 Set_Casing (Mixed_Case);
2712 -- Determine if the reference we are dealing with corresponds to
2713 -- text at the point of the error reference. This will often be
2714 -- the case for simple identifier references, and is the case
2715 -- where we can copy the spelling from the source.
2717 Sbuffer := Source_Text (Get_Source_File_Index (Src_Loc));
2719 while Ref_Ptr <= Name_Len loop
2721 Fold_Lower (Sbuffer (Src_Ptr)) /=
2722 Fold_Lower (Name_Buffer (Ref_Ptr));
2723 Ref_Ptr := Ref_Ptr + 1;
2724 Src_Ptr := Src_Ptr + 1;
2727 -- If we get through the loop without a mismatch, then output the
2728 -- name the way it is spelled in the source program
2730 if Ref_Ptr > Name_Len then
2733 for J in 1 .. Name_Len loop
2734 Name_Buffer (J) := Sbuffer (Src_Ptr);
2735 Src_Ptr := Src_Ptr + 1;
2738 -- Otherwise set the casing using the default identifier casing
2741 Set_Casing (Identifier_Casing (Flag_Source), Mixed_Case);
2746 Set_Msg_Name_Buffer;
2754 procedure Set_Msg_Text (Text : String; Flag : Source_Ptr) is
2755 C : Character; -- Current character
2756 P : Natural; -- Current index;
2758 procedure Skip_Msg_Insertion_Warning (C : Character);
2759 -- Deal with ? ?? ?x? ?X? ?*? ?$? insertion sequences (and the same
2760 -- sequences using < instead of ?). The caller has already bumped
2761 -- the pointer past the initial ? or < and C is set to this initial
2762 -- character (? or <). This procedure skips past the rest of the
2763 -- sequence. We do not need to set Msg_Insertion_Char, since this
2764 -- was already done during the message prescan.
2766 --------------------------------
2767 -- Skip_Msg_Insertion_Warning --
2768 --------------------------------
2770 procedure Skip_Msg_Insertion_Warning (C : Character) is
2772 if P <= Text'Last and then Text (P) = C then
2775 elsif P + 1 <= Text'Last
2776 and then (Text (P) in 'a' .. 'z'
2778 Text (P) in 'A' .. 'Z'
2783 and then Text (P + 1) = C
2787 end Skip_Msg_Insertion_Warning;
2789 -- Start of processing for Set_Msg_Text
2792 Manual_Quote_Mode := False;
2794 Flag_Source := Get_Source_File_Index (Flag);
2796 -- Skip info: at start, we have recorded this in Is_Info_Msg, and this
2797 -- will be used (Info field in error message object) to put back the
2798 -- string when it is printed. We need to do this, or we get confused
2799 -- with instantiation continuations.
2802 and then Text (Text'First .. Text'First + 5) = "info: "
2804 P := Text'First + 6;
2809 -- Loop through characters of message
2811 while P <= Text'Last loop
2815 -- Check for insertion character or sequence
2819 if P <= Text'Last and then Text (P) = '%' then
2821 Set_Msg_Insertion_Name_Literal;
2823 Set_Msg_Insertion_Name;
2827 if P <= Text'Last and then Text (P) = '$' then
2829 Set_Msg_Insertion_Unit_Name (Suffix => False);
2831 Set_Msg_Insertion_Unit_Name;
2835 Set_Msg_Insertion_File_Name;
2838 Set_Msg_Insertion_Type_Reference (Flag);
2841 Set_Msg_Insertion_Reserved_Name;
2844 Set_Msg_Insertion_Node;
2847 Set_Msg_Insertion_Line_Number (Error_Msg_Sloc, Flag);
2850 Continuation := True;
2852 if Text (P) = '\' then
2853 Continuation_New_Line := True;
2858 Set_Msg_Insertion_Column;
2861 Set_Msg_Insertion_Run_Time_Name;
2864 Set_Msg_Insertion_Uint;
2867 Manual_Quote_Mode := not Manual_Quote_Mode;
2871 null; -- already dealt with
2874 Skip_Msg_Insertion_Warning ('?');
2877 Skip_Msg_Insertion_Warning ('<');
2880 null; -- already dealt with
2883 Set_Msg_Char (Text (P));
2887 Set_Msg_Str (Error_Msg_String (1 .. Error_Msg_Strlen));
2889 -- Upper case letter
2893 -- Start of reserved word if two or more
2895 if P <= Text'Last and then Text (P) in 'A' .. 'Z' then
2897 Set_Msg_Insertion_Reserved_Word (Text, P);
2899 -- Single upper case letter is just inserted
2905 -- '[' (will be/would have been raised at run time)
2908 if Is_Warning_Msg then
2909 Set_Msg_Str ("will be raised at run time");
2911 Set_Msg_Str ("would have been raised at run time");
2914 -- ']' (may be/might have been raised at run time)
2917 if Is_Warning_Msg then
2918 Set_Msg_Str ("may be raised at run time");
2920 Set_Msg_Str ("might have been raised at run time");
2923 -- Normal character with no special treatment
2937 procedure Set_Posted (N : Node_Id) is
2941 if Is_Serious_Error then
2943 -- We always set Error_Posted on the node itself
2945 Set_Error_Posted (N);
2947 -- If it is a subexpression, then set Error_Posted on parents up to
2948 -- and including the first non-subexpression construct. This helps
2949 -- avoid cascaded error messages within a single expression.
2955 Set_Error_Posted (P);
2956 exit when Nkind (P) not in N_Subexpr;
2959 -- A special check, if we just posted an error on an attribute
2960 -- definition clause, then also set the entity involved as posted.
2961 -- For example, this stops complaining about the alignment after
2962 -- complaining about the size, which is likely to be useless.
2964 if Nkind (P) = N_Attribute_Definition_Clause then
2965 if Is_Entity_Name (Name (P)) then
2966 Set_Error_Posted (Entity (Name (P)));
2972 -----------------------
2973 -- Set_Qualification --
2974 -----------------------
2976 procedure Set_Qualification (N : Nat; E : Entity_Id) is
2978 if N /= 0 and then Scope (E) /= Standard_Standard then
2979 Set_Qualification (N - 1, Scope (E));
2980 Set_Msg_Node (Scope (E));
2983 end Set_Qualification;
2985 ------------------------
2986 -- Special_Msg_Delete --
2987 ------------------------
2989 -- Is it really right to have all this specialized knowledge in errout?
2991 function Special_Msg_Delete
2993 N : Node_Or_Entity_Id;
2994 E : Node_Or_Entity_Id) return Boolean
2997 -- Never delete messages in -gnatdO mode
2999 if Debug_Flag_OO then
3002 -- Processing for "atomic access cannot be guaranteed"
3004 elsif Msg = "atomic access to & cannot be guaranteed" then
3006 -- When an atomic object refers to a non-atomic type in the same
3007 -- scope, we implicitly make the type atomic. In the non-error case
3008 -- this is surely safe (and in fact prevents an error from occurring
3009 -- if the type is not atomic by default). But if the object cannot be
3010 -- made atomic, then we introduce an extra junk message by this
3011 -- manipulation, which we get rid of here.
3013 -- We identify this case by the fact that it references a type for
3014 -- which Is_Atomic is set, but there is no Atomic pragma setting it.
3017 and then Is_Atomic (E)
3018 and then No (Get_Rep_Pragma (E, Name_Atomic))
3023 -- Processing for "Size too small" messages
3025 elsif Msg = "size for& too small, minimum allowed is ^" then
3027 -- Suppress "size too small" errors in CodePeer mode, since code may
3028 -- be analyzed in a different configuration than the one used for
3029 -- compilation. Even when the configurations match, this message
3030 -- may be issued on correct code, because pragma Pack is ignored
3031 -- in CodePeer mode.
3033 if CodePeer_Mode then
3036 -- When a size is wrong for a frozen type there is no explicit size
3037 -- clause, and other errors have occurred, suppress the message,
3038 -- since it is likely that this size error is a cascaded result of
3039 -- other errors. The reason we eliminate unfrozen types is that
3040 -- messages issued before the freeze type are for sure OK.
3043 and then Serious_Errors_Detected > 0
3044 and then Nkind (N) /= N_Component_Clause
3045 and then Nkind (Parent (N)) /= N_Component_Clause
3047 No (Get_Attribute_Definition_Clause (E, Attribute_Size))
3049 No (Get_Attribute_Definition_Clause (E, Attribute_Object_Size))
3051 No (Get_Attribute_Definition_Clause (E, Attribute_Value_Size))
3057 -- All special tests complete, so go ahead with message
3060 end Special_Msg_Delete;
3062 --------------------------
3063 -- Unwind_Internal_Type --
3064 --------------------------
3066 procedure Unwind_Internal_Type (Ent : in out Entity_Id) is
3067 Derived : Boolean := False;
3069 Old_Ent : Entity_Id;
3072 -- Undo placement of a quote, since we will put it back later
3074 Mchar := Msg_Buffer (Msglen);
3077 Msglen := Msglen - 1;
3080 -- The loop here deals with recursive types, we are trying to find a
3081 -- related entity that is not an implicit type. Note that the check with
3082 -- Old_Ent stops us from getting "stuck". Also, we don't output the
3083 -- "type derived from" message more than once in the case where we climb
3084 -- up multiple levels.
3089 -- Implicit access type, use directly designated type In Ada 2005,
3090 -- the designated type may be an anonymous access to subprogram, in
3091 -- which case we can only point to its definition.
3093 if Is_Access_Type (Ent) then
3094 if Ekind (Ent) = E_Access_Subprogram_Type
3095 or else Ekind (Ent) = E_Anonymous_Access_Subprogram_Type
3096 or else Is_Access_Protected_Subprogram_Type (Ent)
3098 Ent := Directly_Designated_Type (Ent);
3100 if not Comes_From_Source (Ent) then
3101 if Buffer_Ends_With ("type ") then
3102 Buffer_Remove ("type ");
3106 if Ekind (Ent) = E_Function then
3107 Set_Msg_Str ("access to function ");
3108 elsif Ekind (Ent) = E_Procedure then
3109 Set_Msg_Str ("access to procedure ");
3111 Set_Msg_Str ("access to subprogram");
3116 -- Type is access to object, named or anonymous
3119 Set_Msg_Str ("access to ");
3120 Ent := Directly_Designated_Type (Ent);
3125 elsif Is_Class_Wide_Type (Ent) then
3127 Ent := Root_Type (Ent);
3129 -- Use base type if this is a subtype
3131 elsif Ent /= Base_Type (Ent) then
3132 Buffer_Remove ("type ");
3134 -- Avoid duplication "subtype of subtype of", and also replace
3135 -- "derived from subtype of" simply by "derived from"
3137 if not Buffer_Ends_With ("subtype of ")
3138 and then not Buffer_Ends_With ("derived from ")
3140 Set_Msg_Str ("subtype of ");
3143 Ent := Base_Type (Ent);
3145 -- If this is a base type with a first named subtype, use the first
3146 -- named subtype instead. This is not quite accurate in all cases,
3147 -- but it makes too much noise to be accurate and add 'Base in all
3148 -- cases. Note that we only do this is the first named subtype is not
3149 -- itself an internal name. This avoids the obvious loop (subtype ->
3150 -- basetype -> subtype) which would otherwise occur).
3154 FST : constant Entity_Id := First_Subtype (Ent);
3157 if not Is_Internal_Name (Chars (FST)) then
3161 -- Otherwise use root type
3165 Buffer_Remove ("type ");
3167 -- Test for "subtype of type derived from" which seems
3168 -- excessive and is replaced by "type derived from".
3170 Buffer_Remove ("subtype of");
3172 -- Avoid duplicated "type derived from type derived from"
3174 if not Buffer_Ends_With ("type derived from ") then
3175 Set_Msg_Str ("type derived from ");
3186 -- If we are stuck in a loop, get out and settle for the internal
3187 -- name after all. In this case we set to kill the message if it is
3188 -- not the first error message (we really try hard not to show the
3189 -- dirty laundry of the implementation to the poor user).
3191 if Ent = Old_Ent then
3192 Kill_Message := True;
3196 -- Get out if we finally found a non-internal name to use
3198 exit Find when not Is_Internal_Name (Chars (Ent));
3204 end Unwind_Internal_Type;
3210 procedure VMS_Convert is
3220 P := Msg_Buffer'First;
3226 if Msg_Buffer (P) = '-' then
3227 for G in Gnames'Range loop
3228 L := Gnames (G)'Length;
3230 -- See if we have "-ggg switch", where ggg is Gnames entry
3232 if P + L + 7 <= Msglen
3233 and then Msg_Buffer (P + 1 .. P + L) = Gnames (G).all
3234 and then Msg_Buffer (P + L + 1 .. P + L + 7) = " switch"
3236 -- Replace by "/vvv qualifier", where vvv is Vnames entry
3238 N := Vnames (G)'Length;
3239 Msg_Buffer (P + N + 11 .. Msglen + N - L + 3) :=
3240 Msg_Buffer (P + L + 8 .. Msglen);
3241 Msg_Buffer (P) := '/';
3242 Msg_Buffer (P + 1 .. P + N) := Vnames (G).all;
3243 Msg_Buffer (P + N + 1 .. P + N + 10) := " qualifier";
3245 Msglen := Msglen + N - L + 3;
3255 --------------------
3256 -- Warn_Insertion --
3257 --------------------
3259 function Warn_Insertion return String is
3261 case Warning_Msg_Char is
3264 when 'a' .. 'z' | 'A' .. 'Z' | '*' | '$' =>
3265 return '?' & Warning_Msg_Char & '?';
3269 raise Program_Error;