1 ------------------------------------------------------------------------------
3 -- GNAT COMPILER COMPONENTS --
9 -- Copyright (C) 1992-2013, 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 -- In formal verification mode, errors issued when generating Why code
238 -- are not compilation errors, and should not result in exiting with
239 -- an error status. These errors are handled in the driver of the
240 -- verification process instead.
242 elsif SPARK_Mode and not Frame_Condition_Mode then
246 return Erroutc.Compilation_Errors;
248 end Compilation_Errors;
254 -- Error_Msg posts a flag at the given location, except that if the
255 -- Flag_Location points within a generic template and corresponds to an
256 -- instantiation of this generic template, then the actual message will be
257 -- posted on the generic instantiation, along with additional messages
258 -- referencing the generic declaration.
260 procedure Error_Msg (Msg : String; Flag_Location : Source_Ptr) is
261 Sindex : Source_File_Index;
262 -- Source index for flag location
264 Orig_Loc : Source_Ptr;
265 -- Original location of Flag_Location (i.e. location in original
266 -- template in instantiation case, otherwise unchanged).
269 -- It is a fatal error to issue an error message when scanning from the
270 -- internal source buffer (see Sinput for further documentation)
272 pragma Assert (Sinput.Source /= Internal_Source_Ptr);
274 -- Return if all errors are to be ignored
276 if Errors_Must_Be_Ignored then
280 -- If we already have messages, and we are trying to place a message at
281 -- No_Location or in package Standard, then just ignore the attempt
282 -- since we assume that what is happening is some cascaded junk. Note
283 -- that this is safe in the sense that proceeding will surely bomb.
285 if Flag_Location < First_Source_Ptr
286 and then Total_Errors_Detected > 0
291 -- Start of processing for new message
293 Sindex := Get_Source_File_Index (Flag_Location);
294 Test_Style_Warning_Serious_Unconditional_Msg (Msg);
295 Orig_Loc := Original_Location (Flag_Location);
297 -- If the current location is in an instantiation, the issue arises of
298 -- whether to post the message on the template or the instantiation.
300 -- The way we decide is to see if we have posted the same message on
301 -- the template when we compiled the template (the template is always
302 -- compiled before any instantiations). For this purpose, we use a
303 -- separate table of messages. The reason we do this is twofold:
305 -- First, the messages can get changed by various processing
306 -- including the insertion of tokens etc, making it hard to
307 -- do the comparison.
309 -- Second, we will suppress a warning on a template if it is not in
310 -- the current extended source unit. That's reasonable and means we
311 -- don't want the warning on the instantiation here either, but it
312 -- does mean that the main error table would not in any case include
315 if Flag_Location = Orig_Loc then
316 Non_Instance_Msgs.Append ((new String'(Msg), Flag_Location));
317 Warn_On_Instance := False;
319 -- Here we have an instance message
322 -- Delete if debug flag off, and this message duplicates a message
323 -- already posted on the corresponding template
325 if not Debug_Flag_GG then
326 for J in Non_Instance_Msgs.First .. Non_Instance_Msgs.Last loop
327 if Msg = Non_Instance_Msgs.Table (J).Msg.all
328 and then Non_Instance_Msgs.Table (J).Loc = Orig_Loc
335 -- No duplicate, so error/warning will be posted on instance
337 Warn_On_Instance := Is_Warning_Msg;
340 -- Ignore warning message that is suppressed for this location. Note
341 -- that style checks are not considered warning messages for this
344 if Is_Warning_Msg and then Warnings_Suppressed (Orig_Loc) then
347 -- For style messages, check too many messages so far
350 and then Maximum_Messages /= 0
351 and then Warnings_Detected >= Maximum_Messages
356 -- The idea at this stage is that we have two kinds of messages
358 -- First, we have those messages that are to be placed as requested at
359 -- Flag_Location. This includes messages that have nothing to do with
360 -- generics, and also messages placed on generic templates that reflect
361 -- an error in the template itself. For such messages we simply call
362 -- Error_Msg_Internal to place the message in the requested location.
364 if Instantiation (Sindex) = No_Location then
365 Error_Msg_Internal (Msg, Flag_Location, Flag_Location, False);
369 -- If we are trying to flag an error in an instantiation, we may have
370 -- a generic contract violation. What we generate in this case is:
372 -- instantiation error at ...
373 -- original error message
377 -- warning: in instantiation at
378 -- warning: original warning message
380 -- All these messages are posted at the location of the top level
381 -- instantiation. If there are nested instantiations, then the
382 -- instantiation error message can be repeated, pointing to each
383 -- of the relevant instantiations.
385 -- Note: the instantiation mechanism is also shared for inlining of
386 -- subprogram bodies when front end inlining is done. In this case the
387 -- messages have the form:
389 -- in inlined body at ...
390 -- original error message
394 -- warning: in inlined body at
395 -- warning: original warning message
397 -- OK, here we have an instantiation error, and we need to generate the
398 -- error on the instantiation, rather than on the template.
401 Actual_Error_Loc : Source_Ptr;
402 -- Location of outer level instantiation in instantiation case, or
403 -- just a copy of Flag_Location in the normal case. This is the
404 -- location where all error messages will actually be posted.
406 Save_Error_Msg_Sloc : constant Source_Ptr := Error_Msg_Sloc;
407 -- Save possible location set for caller's message. We need to use
408 -- Error_Msg_Sloc for the location of the instantiation error but we
409 -- have to preserve a possible original value.
411 X : Source_File_Index;
413 Msg_Cont_Status : Boolean;
414 -- Used to label continuation lines in instantiation case with
415 -- proper Msg_Cont status.
418 -- Loop to find highest level instantiation, where all error
419 -- messages will be placed.
423 Actual_Error_Loc := Instantiation (X);
424 X := Get_Source_File_Index (Actual_Error_Loc);
425 exit when Instantiation (X) = No_Location;
428 -- Since we are generating the messages at the instantiation point in
429 -- any case, we do not want the references to the bad lines in the
430 -- instance to be annotated with the location of the instantiation.
432 Suppress_Instance_Location := True;
433 Msg_Cont_Status := False;
435 -- Loop to generate instantiation messages
437 Error_Msg_Sloc := Flag_Location;
438 X := Get_Source_File_Index (Flag_Location);
439 while Instantiation (X) /= No_Location loop
441 -- Suppress instantiation message on continuation lines
443 if Msg (Msg'First) /= '\' then
445 -- Case of inlined body
447 if Inlined_Body (X) then
448 if Is_Warning_Msg or else Is_Style_Msg then
450 ("?in inlined body #",
451 Actual_Error_Loc, Flag_Location, Msg_Cont_Status);
454 ("error in inlined body #",
455 Actual_Error_Loc, Flag_Location, Msg_Cont_Status);
458 -- Case of generic instantiation
461 if Is_Warning_Msg or else Is_Style_Msg then
463 ("?in instantiation #",
464 Actual_Error_Loc, Flag_Location, Msg_Cont_Status);
467 ("instantiation error #",
468 Actual_Error_Loc, Flag_Location, Msg_Cont_Status);
473 Error_Msg_Sloc := Instantiation (X);
474 X := Get_Source_File_Index (Error_Msg_Sloc);
475 Msg_Cont_Status := True;
478 Suppress_Instance_Location := False;
479 Error_Msg_Sloc := Save_Error_Msg_Sloc;
481 -- Here we output the original message on the outer instantiation
484 (Msg, Actual_Error_Loc, Flag_Location, Msg_Cont_Status);
488 --------------------------------
489 -- Error_Msg_Ada_2012_Feature --
490 --------------------------------
492 procedure Error_Msg_Ada_2012_Feature (Feature : String; Loc : Source_Ptr) is
494 if Ada_Version < Ada_2012 then
495 Error_Msg (Feature & " is an Ada 2012 feature", Loc);
497 if No (Ada_Version_Pragma) then
498 Error_Msg ("\unit must be compiled with -gnat2012 switch", Loc);
500 Error_Msg_Sloc := Sloc (Ada_Version_Pragma);
501 Error_Msg ("\incompatible with Ada version set#", Loc);
504 end Error_Msg_Ada_2012_Feature;
510 procedure Error_Msg_AP (Msg : String) is
515 -- If we had saved the Scan_Ptr value after scanning the previous
516 -- token, then we would have exactly the right place for putting
517 -- the flag immediately at hand. However, that would add at least
518 -- two instructions to a Scan call *just* to service the possibility
519 -- of an Error_Msg_AP call. So instead we reconstruct that value.
521 -- We have two possibilities, start with Prev_Token_Ptr and skip over
522 -- the current token, which is made harder by the possibility that this
523 -- token may be in error, or start with Token_Ptr and work backwards.
524 -- We used to take the second approach, but it's hard because of
525 -- comments, and harder still because things that look like comments
526 -- can appear inside strings. So now we take the first approach.
528 -- Note: in the case where there is no previous token, Prev_Token_Ptr
529 -- is set to Source_First, which is a reasonable position for the
530 -- error flag in this situation.
532 S1 := Prev_Token_Ptr;
535 -- If the previous token is a string literal, we need a special approach
536 -- since there may be white space inside the literal and we don't want
537 -- to stop on that white space.
539 -- Note: since this is an error recovery issue anyway, it is not worth
540 -- worrying about special UTF_32 line terminator characters here.
542 if Prev_Token = Tok_String_Literal then
546 if Source (S1) = C then
548 exit when Source (S1) /= C;
549 elsif Source (S1) in Line_Terminator then
554 -- Character literal also needs special handling
556 elsif Prev_Token = Tok_Char_Literal then
559 -- Otherwise we search forward for the end of the current token, marked
560 -- by a line terminator, white space, a comment symbol or if we bump
561 -- into the following token (i.e. the current token).
563 -- Again, it is not worth worrying about UTF_32 special line terminator
564 -- characters in this context, since this is only for error recovery.
567 while Source (S1) not in Line_Terminator
568 and then Source (S1) /= ' '
569 and then Source (S1) /= ASCII.HT
570 and then (Source (S1) /= '-' or else Source (S1 + 1) /= '-')
571 and then S1 /= Token_Ptr
577 -- S1 is now set to the location for the flag
586 procedure Error_Msg_BC (Msg : String) is
588 -- If we are at end of file, post the flag after the previous token
590 if Token = Tok_EOF then
593 -- If we are at start of file, post the flag at the current token
595 elsif Token_Ptr = Source_First (Current_Source_File) then
598 -- If the character before the current token is a space or a horizontal
599 -- tab, then we place the flag on this character (in the case of a tab
600 -- we would really like to place it in the "last" character of the tab
601 -- space, but that it too much trouble to worry about).
603 elsif Source (Token_Ptr - 1) = ' '
604 or else Source (Token_Ptr - 1) = ASCII.HT
606 Error_Msg (Msg, Token_Ptr - 1);
608 -- If there is no space or tab before the current token, then there is
609 -- no room to place the flag before the token, so we place it on the
610 -- token instead (this happens for example at the start of a line).
613 Error_Msg (Msg, Token_Ptr);
621 procedure Error_Msg_CRT (Feature : String; N : Node_Id) is
622 CNRT : constant String := " not allowed in no run time mode";
623 CCRT : constant String := " not supported by configuration>";
625 S : String (1 .. Feature'Length + 1 + CCRT'Length);
630 S (2 .. Feature'Length + 1) := Feature;
631 L := Feature'Length + 2;
633 if No_Run_Time_Mode then
634 S (L .. L + CNRT'Length - 1) := CNRT;
635 L := L + CNRT'Length - 1;
637 else pragma Assert (Configurable_Run_Time_Mode);
638 S (L .. L + CCRT'Length - 1) := CCRT;
639 L := L + CCRT'Length - 1;
642 Error_Msg_N (S (1 .. L), N);
643 Configurable_Run_Time_Violations := Configurable_Run_Time_Violations + 1;
650 procedure Error_Msg_PT (Typ : Node_Id; Subp : Node_Id) is
652 -- Error message below needs rewording (remember comma in -gnatj
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;
703 procedure Handle_Serious_Error;
704 -- Internal procedure to do all error message handling for a serious
705 -- error message, other than bumping the error counts and arranging
706 -- for the message to be output.
708 --------------------------
709 -- Handle_Serious_Error --
710 --------------------------
712 procedure Handle_Serious_Error is
714 -- Turn off code generation if not done already
716 if Operating_Mode = Generate_Code then
717 Operating_Mode := Check_Semantics;
718 Expander_Active := False;
721 -- Set the fatal error flag in the unit table unless we are in
722 -- Try_Semantics mode. This stops the semantics from being performed
723 -- if we find a serious error. This is skipped if we are currently
724 -- dealing with the configuration pragma file.
726 if not Try_Semantics and then Current_Source_Unit /= No_Unit then
727 Set_Fatal_Error (Get_Source_Unit (Sptr));
729 end Handle_Serious_Error;
731 -- Start of processing for Error_Msg_Internal
734 if Raise_Exception_On_Error /= 0 then
735 raise Error_Msg_Exception;
738 Continuation := Msg_Cont;
739 Continuation_New_Line := False;
740 Suppress_Message := False;
741 Kill_Message := False;
742 Set_Msg_Text (Msg, Sptr);
744 -- Kill continuation if parent message killed
746 if Continuation and Last_Killed then
750 -- Return without doing anything if message is suppressed
753 and then not All_Errors_Mode
754 and then not Is_Warning_Msg
755 and then not Is_Unconditional_Msg
757 if not Continuation then
764 -- Return without doing anything if message is killed and this is not
765 -- the first error message. The philosophy is that if we get a weird
766 -- error message and we already have had a message, then we hope the
767 -- weird message is a junk cascaded message
770 and then not All_Errors_Mode
771 and then Total_Errors_Detected /= 0
773 if not Continuation then
780 -- Special check for warning message to see if it should be output
782 if Is_Warning_Msg then
784 -- Immediate return if warning message and warnings are suppressed
786 if Warnings_Suppressed (Optr) or else Warnings_Suppressed (Sptr) then
787 Cur_Msg := No_Error_Msg;
791 -- If the flag location is in the main extended source unit then for
792 -- sure we want the warning since it definitely belongs
794 if In_Extended_Main_Source_Unit (Sptr) then
797 -- If the main unit has not been read yet. the warning must be on
798 -- a configuration file: gnat.adc or user-defined. This means we
799 -- are not parsing the main unit yet, so skip following checks.
801 elsif No (Cunit (Main_Unit)) then
804 -- If the flag location is not in the main extended source unit, then
805 -- we want to eliminate the warning, unless it is in the extended
806 -- main code unit and we want warnings on the instance.
808 elsif In_Extended_Main_Code_Unit (Sptr) and then Warn_On_Instance then
811 -- Keep warning if debug flag G set
813 elsif Debug_Flag_GG then
816 -- Keep warning if message text contains !!
818 elsif Has_Double_Exclam then
821 -- Here is where we delete a warning from a with'ed unit
824 Cur_Msg := No_Error_Msg;
826 if not Continuation then
834 -- If message is to be ignored in special ignore message mode, this is
835 -- where we do this special processing, bypassing message output.
837 if Ignore_Errors_Enable > 0 then
838 if Is_Serious_Error then
839 Handle_Serious_Error;
845 -- If error message line length set, and this is a continuation message
846 -- then all we do is to append the text to the text of the last message
847 -- with a comma space separator (eliminating a possible (style) or
850 if Error_Msg_Line_Length /= 0 and then Continuation then
851 Cur_Msg := Errors.Last;
854 Oldm : String_Ptr := Errors.Table (Cur_Msg).Text;
855 Newm : String (1 .. Oldm'Last + 2 + Msglen);
860 -- First copy old message to new one and free it
862 Newm (Oldm'Range) := Oldm.all;
866 -- Remove (style) or info: at start of message
868 if Msglen > 8 and then Msg_Buffer (1 .. 8) = "(style) " then
871 elsif Msglen > 6 and then Msg_Buffer (1 .. 6) = "info: " then
878 -- Now deal with separation between messages. Normally this is
879 -- simply comma space, but there are some special cases.
881 -- If continuation new line, then put actual NL character in msg
883 if Continuation_New_Line then
885 Newm (Newl) := ASCII.LF;
887 -- If continuation message is enclosed in parentheses, then
888 -- special treatment (don't need a comma, and we want to combine
889 -- successive parenthetical remarks into a single one with
890 -- separating commas).
892 elsif Msg_Buffer (M) = '(' and then Msg_Buffer (Msglen) = ')' then
894 -- Case where existing message ends in right paren, remove
895 -- and separate parenthetical remarks with a comma.
897 if Newm (Newl) = ')' then
899 Msg_Buffer (M) := ' ';
901 -- Case where we are adding new parenthetical comment
908 -- Case where continuation not in parens and no new line
911 Newm (Newl + 1 .. Newl + 2) := ", ";
915 -- Append new message
917 Newm (Newl + 1 .. Newl + Msglen - M + 1) :=
918 Msg_Buffer (M .. Msglen);
919 Newl := Newl + Msglen - M + 1;
920 Errors.Table (Cur_Msg).Text := new String'(Newm (1 .. Newl));
922 -- Update warning msg flag and message doc char if needed
924 if Is_Warning_Msg then
925 if not Errors.Table (Cur_Msg).Warn then
926 Errors.Table (Cur_Msg).Warn := True;
927 Errors.Table (Cur_Msg).Warn_Chr := Warning_Msg_Char;
929 elsif Warning_Msg_Char /= ' ' then
930 Errors.Table (Cur_Msg).Warn_Chr := Warning_Msg_Char;
938 -- Here we build a new error object
941 ((Text => new String'(Msg_Buffer (1 .. Msglen)),
942 Next => No_Error_Msg,
943 Prev => No_Error_Msg,
946 Sfile => Get_Source_File_Index (Sptr),
947 Line => Get_Physical_Line_Number (Sptr),
948 Col => Get_Column_Number (Sptr),
949 Warn => Is_Warning_Msg,
950 Warn_Chr => Warning_Msg_Char,
951 Style => Is_Style_Msg,
952 Serious => Is_Serious_Error,
953 Uncond => Is_Unconditional_Msg,
954 Msg_Cont => Continuation,
956 Cur_Msg := Errors.Last;
958 -- If immediate errors mode set, output error message now. Also output
959 -- now if the -d1 debug flag is set (so node number message comes out
960 -- just before actual error message)
962 if Debug_Flag_OO or else Debug_Flag_1 then
965 (Errors.Table (Cur_Msg).Line, Errors.Table (Cur_Msg).Sfile, True);
967 Output_Error_Msgs (Temp_Msg);
969 -- If not in immediate errors mode, then we insert the message in the
970 -- error chain for later output by Finalize. The messages are sorted
971 -- first by unit (main unit comes first), and within a unit by source
972 -- location (earlier flag location first in the chain).
975 -- First a quick check, does this belong at the very end of the chain
976 -- of error messages. This saves a lot of time in the normal case if
977 -- there are lots of messages.
979 if Last_Error_Msg /= No_Error_Msg
980 and then Errors.Table (Cur_Msg).Sfile =
981 Errors.Table (Last_Error_Msg).Sfile
982 and then (Sptr > Errors.Table (Last_Error_Msg).Sptr
984 (Sptr = Errors.Table (Last_Error_Msg).Sptr
986 Optr > Errors.Table (Last_Error_Msg).Optr))
988 Prev_Msg := Last_Error_Msg;
989 Next_Msg := No_Error_Msg;
991 -- Otherwise do a full sequential search for the insertion point
994 Prev_Msg := No_Error_Msg;
995 Next_Msg := First_Error_Msg;
996 while Next_Msg /= No_Error_Msg loop
998 Errors.Table (Cur_Msg).Sfile < Errors.Table (Next_Msg).Sfile;
1000 if Errors.Table (Cur_Msg).Sfile =
1001 Errors.Table (Next_Msg).Sfile
1003 exit when Sptr < Errors.Table (Next_Msg).Sptr
1005 (Sptr = Errors.Table (Next_Msg).Sptr
1007 Optr < Errors.Table (Next_Msg).Optr);
1010 Prev_Msg := Next_Msg;
1011 Next_Msg := Errors.Table (Next_Msg).Next;
1015 -- Now we insert the new message in the error chain. The insertion
1016 -- point for the message is after Prev_Msg and before Next_Msg.
1018 -- The possible insertion point for the new message is after Prev_Msg
1019 -- and before Next_Msg. However, this is where we do a special check
1020 -- for redundant parsing messages, defined as messages posted on the
1021 -- same line. The idea here is that probably such messages are junk
1022 -- from the parser recovering. In full errors mode, we don't do this
1023 -- deletion, but otherwise such messages are discarded at this stage.
1025 if Prev_Msg /= No_Error_Msg
1026 and then Errors.Table (Prev_Msg).Line =
1027 Errors.Table (Cur_Msg).Line
1028 and then Errors.Table (Prev_Msg).Sfile =
1029 Errors.Table (Cur_Msg).Sfile
1030 and then Compiler_State = Parsing
1031 and then not All_Errors_Mode
1033 -- Don't delete unconditional messages and at this stage, don't
1034 -- delete continuation lines (we attempted to delete those earlier
1035 -- if the parent message was deleted.
1037 if not Errors.Table (Cur_Msg).Uncond
1038 and then not Continuation
1040 -- Don't delete if prev msg is warning and new msg is an error.
1041 -- This is because we don't want a real error masked by a
1042 -- warning. In all other cases (that is parse errors for the
1043 -- same line that are not unconditional) we do delete the
1044 -- message. This helps to avoid junk extra messages from
1045 -- cascaded parsing errors
1047 if not (Errors.Table (Prev_Msg).Warn
1049 Errors.Table (Prev_Msg).Style)
1051 (Errors.Table (Cur_Msg).Warn
1053 Errors.Table (Cur_Msg).Style)
1055 -- All tests passed, delete the message by simply returning
1056 -- without any further processing.
1058 if not Continuation then
1059 Last_Killed := True;
1067 -- Come here if message is to be inserted in the error chain
1069 if not Continuation then
1070 Last_Killed := False;
1073 if Prev_Msg = No_Error_Msg then
1074 First_Error_Msg := Cur_Msg;
1076 Errors.Table (Prev_Msg).Next := Cur_Msg;
1079 Errors.Table (Cur_Msg).Next := Next_Msg;
1081 if Next_Msg = No_Error_Msg then
1082 Last_Error_Msg := Cur_Msg;
1086 -- Bump appropriate statistics count
1088 if Errors.Table (Cur_Msg).Warn or else Errors.Table (Cur_Msg).Style then
1089 Warnings_Detected := Warnings_Detected + 1;
1092 Total_Errors_Detected := Total_Errors_Detected + 1;
1094 if Errors.Table (Cur_Msg).Serious then
1095 Serious_Errors_Detected := Serious_Errors_Detected + 1;
1096 Handle_Serious_Error;
1100 -- If too many warnings turn off warnings
1102 if Maximum_Messages /= 0 then
1103 if Warnings_Detected = Maximum_Messages then
1104 Warning_Mode := Suppress;
1107 -- If too many errors abandon compilation
1109 if Total_Errors_Detected = Maximum_Messages then
1110 raise Unrecoverable_Error;
1113 end Error_Msg_Internal;
1119 procedure Error_Msg_N (Msg : String; N : Node_Or_Entity_Id) is
1121 Error_Msg_NEL (Msg, N, N, Sloc (N));
1128 procedure Error_Msg_NE
1130 N : Node_Or_Entity_Id;
1131 E : Node_Or_Entity_Id)
1134 Error_Msg_NEL (Msg, N, E, Sloc (N));
1141 procedure Error_Msg_NEL
1143 N : Node_Or_Entity_Id;
1144 E : Node_Or_Entity_Id;
1145 Flag_Location : Source_Ptr)
1148 if Special_Msg_Delete (Msg, N, E) then
1152 Test_Style_Warning_Serious_Unconditional_Msg (Msg);
1154 -- Special handling for warning messages
1156 if Is_Warning_Msg then
1158 -- Suppress if no warnings set for either entity or node
1160 if No_Warnings (N) or else No_Warnings (E) then
1162 -- Disable any continuation messages as well
1164 Last_Killed := True;
1168 -- Suppress if inside loop that is known to be null or is probably
1169 -- null (case where loop executes only if invalid values present).
1170 -- In either case warnings in the loop are likely to be junk.
1177 while Present (P) loop
1178 if Nkind (P) = N_Loop_Statement
1179 and then Suppress_Loop_Warnings (P)
1189 -- Test for message to be output
1192 or else Is_Unconditional_Msg
1193 or else Is_Warning_Msg
1195 or else (Msg (Msg'First) = '\' and then not Last_Killed)
1198 Error_Msg_Node_1 := E;
1199 Error_Msg (Msg, Flag_Location);
1202 Last_Killed := True;
1205 if not (Is_Warning_Msg or Is_Style_Msg) then
1214 procedure Error_Msg_NW
1217 N : Node_Or_Entity_Id)
1221 and then In_Extended_Main_Source_Unit (N)
1222 and then Comes_From_Source (N)
1224 Error_Msg_NEL (Msg, N, N, Sloc (N));
1232 procedure Error_Msg_S (Msg : String) is
1234 Error_Msg (Msg, Scan_Ptr);
1241 procedure Error_Msg_SC (Msg : String) is
1243 -- If we are at end of file, post the flag after the previous token
1245 if Token = Tok_EOF then
1248 -- For all other cases the message is posted at the current token
1252 Error_Msg (Msg, Token_Ptr);
1260 procedure Error_Msg_SP (Msg : String) is
1262 -- Note: in the case where there is no previous token, Prev_Token_Ptr
1263 -- is set to Source_First, which is a reasonable position for the
1264 -- error flag in this situation
1266 Error_Msg (Msg, Prev_Token_Ptr);
1273 procedure Finalize (Last_Call : Boolean) is
1278 procedure Delete_Warning (E : Error_Msg_Id);
1279 -- Delete a message if not already deleted and adjust warning count
1281 --------------------
1282 -- Delete_Warning --
1283 --------------------
1285 procedure Delete_Warning (E : Error_Msg_Id) is
1287 if not Errors.Table (E).Deleted then
1288 Errors.Table (E).Deleted := True;
1289 Warnings_Detected := Warnings_Detected - 1;
1293 -- Start of message for Finalize
1296 -- Set Prev pointers
1298 Cur := First_Error_Msg;
1299 while Cur /= No_Error_Msg loop
1300 Nxt := Errors.Table (Cur).Next;
1301 exit when Nxt = No_Error_Msg;
1302 Errors.Table (Nxt).Prev := Cur;
1306 -- Eliminate any duplicated error messages from the list. This is
1307 -- done after the fact to avoid problems with Change_Error_Text.
1309 Cur := First_Error_Msg;
1310 while Cur /= No_Error_Msg loop
1311 Nxt := Errors.Table (Cur).Next;
1314 while F /= No_Error_Msg
1315 and then Errors.Table (F).Sptr = Errors.Table (Cur).Sptr
1317 Check_Duplicate_Message (Cur, F);
1318 F := Errors.Table (F).Next;
1324 -- Mark any messages suppressed by specific warnings as Deleted
1326 Cur := First_Error_Msg;
1327 while Cur /= No_Error_Msg loop
1329 CE : Error_Msg_Object renames Errors.Table (Cur);
1332 if (CE.Warn and not CE.Deleted)
1334 (Warning_Specifically_Suppressed (CE.Sptr, CE.Text)
1336 Warning_Specifically_Suppressed (CE.Optr, CE.Text))
1338 Delete_Warning (Cur);
1340 -- If this is a continuation, delete previous messages
1343 while Errors.Table (F).Msg_Cont loop
1344 F := Errors.Table (F).Prev;
1348 -- Delete any following continuations
1352 F := Errors.Table (F).Next;
1353 exit when F = No_Error_Msg;
1354 exit when not Errors.Table (F).Msg_Cont;
1360 Cur := Errors.Table (Cur).Next;
1363 Finalize_Called := True;
1365 -- Check consistency of specific warnings (may add warnings). We only
1366 -- do this on the last call, after all possible warnings are posted.
1369 Validate_Specific_Warnings (Error_Msg'Access);
1377 function First_Node (C : Node_Id) return Node_Id is
1378 Orig : constant Node_Id := Original_Node (C);
1379 Loc : constant Source_Ptr := Sloc (Orig);
1380 Sfile : constant Source_File_Index := Get_Source_File_Index (Loc);
1384 function Test_Earlier (N : Node_Id) return Traverse_Result;
1385 -- Function applied to every node in the construct
1387 procedure Search_Tree_First is new Traverse_Proc (Test_Earlier);
1388 -- Create traversal procedure
1394 function Test_Earlier (N : Node_Id) return Traverse_Result is
1395 Norig : constant Node_Id := Original_Node (N);
1396 Loc : constant Source_Ptr := Sloc (Norig);
1399 -- Check for earlier
1403 -- Ignore nodes with no useful location information
1405 and then Loc /= Standard_Location
1406 and then Loc /= No_Location
1408 -- Ignore nodes from a different file. This ensures against cases
1409 -- of strange foreign code somehow being present. We don't want
1410 -- wild placement of messages if that happens.
1412 and then Get_Source_File_Index (Loc) = Sfile
1421 -- Start of processing for First_Node
1424 if Nkind (Orig) in N_Subexpr then
1427 Search_Tree_First (Orig);
1439 function First_Sloc (N : Node_Id) return Source_Ptr is
1440 SI : constant Source_File_Index := Source_Index (Get_Source_Unit (N));
1441 SF : constant Source_Ptr := Source_First (SI);
1446 F := First_Node (N);
1449 -- The following circuit is a bit subtle. When we have parenthesized
1450 -- expressions, then the Sloc will not record the location of the paren,
1451 -- but we would like to post the flag on the paren. So what we do is to
1452 -- crawl up the tree from the First_Node, adjusting the Sloc value for
1453 -- any parentheses we know are present. Yes, we know this circuit is not
1454 -- 100% reliable (e.g. because we don't record all possible paren level
1455 -- values), but this is only for an error message so it is good enough.
1458 Paren_Loop : for J in 1 .. Paren_Count (F) loop
1460 -- We don't look more than 12 characters behind the current
1461 -- location, and in any case not past the front of the source.
1463 Search_Loop : for K in 1 .. 12 loop
1464 exit Search_Loop when S = SF;
1466 if Source_Text (SI) (S - 1) = '(' then
1470 elsif Source_Text (SI) (S - 1) <= ' ' then
1476 end loop Search_Loop;
1477 end loop Paren_Loop;
1479 exit Node_Loop when F = N;
1481 exit Node_Loop when Nkind (F) not in N_Subexpr;
1487 -----------------------
1488 -- Get_Ignore_Errors --
1489 -----------------------
1491 function Get_Ignore_Errors return Boolean is
1493 return Errors_Must_Be_Ignored;
1494 end Get_Ignore_Errors;
1500 procedure Initialize is
1503 First_Error_Msg := No_Error_Msg;
1504 Last_Error_Msg := No_Error_Msg;
1505 Serious_Errors_Detected := 0;
1506 Total_Errors_Detected := 0;
1507 Warnings_Detected := 0;
1508 Cur_Msg := No_Error_Msg;
1511 -- Initialize warnings table, if all warnings are suppressed, supply an
1512 -- initial dummy entry covering all possible source locations.
1515 Specific_Warnings.Init;
1517 if Warning_Mode = Suppress then
1519 ((Start => Source_Ptr'First, Stop => Source_Ptr'Last));
1527 function No_Warnings (N : Node_Or_Entity_Id) return Boolean is
1529 if Error_Posted (N) then
1532 elsif Nkind (N) in N_Entity and then Has_Warnings_Off (N) then
1535 elsif Is_Entity_Name (N)
1536 and then Present (Entity (N))
1537 and then Has_Warnings_Off (Entity (N))
1550 function OK_Node (N : Node_Id) return Boolean is
1551 K : constant Node_Kind := Nkind (N);
1554 if Error_Posted (N) then
1557 elsif K in N_Has_Etype
1558 and then Present (Etype (N))
1559 and then Error_Posted (Etype (N))
1564 or else K = N_Attribute_Reference
1565 or else K = N_Character_Literal
1566 or else K = N_Expanded_Name
1567 or else K = N_Identifier
1568 or else K = N_Operator_Symbol)
1569 and then Present (Entity (N))
1570 and then Error_Posted (Entity (N))
1578 ---------------------
1579 -- Output_Messages --
1580 ---------------------
1582 procedure Output_Messages is
1586 procedure Write_Error_Summary;
1587 -- Write error summary
1589 procedure Write_Header (Sfile : Source_File_Index);
1590 -- Write header line (compiling or checking given file)
1592 procedure Write_Max_Errors;
1593 -- Write message if max errors reached
1595 -------------------------
1596 -- Write_Error_Summary --
1597 -------------------------
1599 procedure Write_Error_Summary is
1601 -- Extra blank line if error messages or source listing were output
1603 if Total_Errors_Detected + Warnings_Detected > 0
1609 -- Message giving number of lines read and number of errors detected.
1610 -- This normally goes to Standard_Output. The exception is when brief
1611 -- mode is not set, verbose mode (or full list mode) is set, and
1612 -- there are errors. In this case we send the message to standard
1613 -- error to make sure that *something* appears on standard error in
1614 -- an error situation.
1616 -- Formerly, only the "# errors" suffix was sent to stderr, whereas
1617 -- "# lines:" appeared on stdout. This caused problems on VMS when
1618 -- the stdout buffer was flushed, giving an extra line feed after
1621 if Total_Errors_Detected + Warnings_Detected /= 0
1622 and then not Brief_Output
1623 and then (Verbose_Mode or Full_List)
1628 -- Message giving total number of lines. Don't give this message if
1629 -- the Main_Source line is unknown (this happens in error situations,
1630 -- e.g. when integrated preprocessing fails).
1632 if Main_Source_File /= No_Source_File then
1634 Write_Int (Num_Source_Lines (Main_Source_File));
1636 if Num_Source_Lines (Main_Source_File) = 1 then
1637 Write_Str (" line: ");
1639 Write_Str (" lines: ");
1643 if Total_Errors_Detected = 0 then
1644 Write_Str ("No errors");
1646 elsif Total_Errors_Detected = 1 then
1647 Write_Str ("1 error");
1650 Write_Int (Total_Errors_Detected);
1651 Write_Str (" errors");
1654 if Warnings_Detected /= 0 then
1656 Write_Int (Warnings_Detected);
1657 Write_Str (" warning");
1659 if Warnings_Detected /= 1 then
1663 if Warning_Mode = Treat_As_Error then
1664 Write_Str (" (treated as error");
1666 if Warnings_Detected /= 1 then
1675 Set_Standard_Output;
1676 end Write_Error_Summary;
1682 procedure Write_Header (Sfile : Source_File_Index) is
1684 if Verbose_Mode or Full_List then
1685 if Original_Operating_Mode = Generate_Code then
1686 Write_Str ("Compiling: ");
1688 Write_Str ("Checking: ");
1691 Write_Name (Full_File_Name (Sfile));
1693 if not Debug_Flag_7 then
1694 Write_Str (" (source file time stamp: ");
1695 Write_Time_Stamp (Sfile);
1703 ----------------------
1704 -- Write_Max_Errors --
1705 ----------------------
1707 procedure Write_Max_Errors is
1709 if Maximum_Messages /= 0 then
1710 if Warnings_Detected >= Maximum_Messages then
1712 Write_Line ("maximum number of warnings output");
1713 Write_Line ("any further warnings suppressed");
1714 Set_Standard_Output;
1717 -- If too many errors print message
1719 if Total_Errors_Detected >= Maximum_Messages then
1721 Write_Line ("fatal error: maximum number of errors detected");
1722 Set_Standard_Output;
1725 end Write_Max_Errors;
1727 -- Start of processing for Output_Messages
1730 -- Error if Finalize has not been called
1732 if not Finalize_Called then
1733 raise Program_Error;
1736 -- Reset current error source file if the main unit has a pragma
1737 -- Source_Reference. This ensures outputting the proper name of
1738 -- the source file in this situation.
1740 if Main_Source_File = No_Source_File
1741 or else Num_SRef_Pragmas (Main_Source_File) /= 0
1743 Current_Error_Source_File := No_Source_File;
1748 if Brief_Output or (not Full_List and not Verbose_Mode) then
1751 E := First_Error_Msg;
1752 while E /= No_Error_Msg loop
1753 if not Errors.Table (E).Deleted and then not Debug_Flag_KK then
1754 if Full_Path_Name_For_Brief_Errors then
1755 Write_Name (Full_Ref_Name (Errors.Table (E).Sfile));
1757 Write_Name (Reference_Name (Errors.Table (E).Sfile));
1761 Write_Int (Int (Physical_To_Logical
1762 (Errors.Table (E).Line,
1763 Errors.Table (E).Sfile)));
1766 if Errors.Table (E).Col < 10 then
1770 Write_Int (Int (Errors.Table (E).Col));
1772 Output_Msg_Text (E);
1776 E := Errors.Table (E).Next;
1779 Set_Standard_Output;
1782 -- Full source listing case
1785 List_Pragmas_Index := 1;
1786 List_Pragmas_Mode := True;
1787 E := First_Error_Msg;
1789 -- Normal case, to stdout (copyright notice already output)
1791 if Full_List_File_Name = null then
1792 if not Debug_Flag_7 then
1799 Create_List_File_Access.all (Full_List_File_Name.all);
1800 Set_Special_Output (Write_List_Info_Access.all'Access);
1802 -- Write copyright notice to file
1804 if not Debug_Flag_7 then
1805 Write_Str ("GNAT ");
1806 Write_Str (Gnat_Version_String);
1808 Write_Str ("Copyright 1992-" &
1810 ", Free Software Foundation, Inc.");
1815 -- First list extended main source file units with errors
1817 for U in Main_Unit .. Last_Unit loop
1818 if In_Extended_Main_Source_Unit (Cunit_Entity (U))
1820 -- If debug flag d.m is set, only the main source is listed
1822 and then (U = Main_Unit or else not Debug_Flag_Dot_M)
1824 -- If the unit of the entity does not come from source, it is
1825 -- an implicit subprogram declaration for a child subprogram.
1826 -- Do not emit errors for it, they are listed with the body.
1829 (No (Cunit_Entity (U))
1830 or else Comes_From_Source (Cunit_Entity (U))
1831 or else not Is_Subprogram (Cunit_Entity (U)))
1834 Sfile : constant Source_File_Index := Source_Index (U);
1839 -- Only write the header if Sfile is known
1841 if Sfile /= No_Source_File then
1842 Write_Header (Sfile);
1846 -- Normally, we don't want an "error messages from file"
1847 -- message when listing the entire file, so we set the
1848 -- current source file as the current error source file.
1849 -- However, the old style of doing things was to list this
1850 -- message if pragma Source_Reference is present, even for
1851 -- the main unit. Since the purpose of the -gnatd.m switch
1852 -- is to duplicate the old behavior, we skip the reset if
1853 -- this debug flag is set.
1855 if not Debug_Flag_Dot_M then
1856 Current_Error_Source_File := Sfile;
1859 -- Only output the listing if Sfile is known, to avoid
1860 -- crashing the compiler.
1862 if Sfile /= No_Source_File then
1863 for N in 1 .. Last_Source_Line (Sfile) loop
1864 while E /= No_Error_Msg
1865 and then Errors.Table (E).Deleted
1867 E := Errors.Table (E).Next;
1872 and then Errors.Table (E).Line = N
1873 and then Errors.Table (E).Sfile = Sfile;
1875 Output_Source_Line (N, Sfile, Err_Flag);
1878 Output_Error_Msgs (E);
1880 if not Debug_Flag_2 then
1890 -- Then output errors, if any, for subsidiary units not in the
1891 -- main extended unit.
1893 -- Note: if debug flag d.m set, include errors for any units other
1894 -- than the main unit in the extended source unit (e.g. spec and
1895 -- subunits for a body).
1897 while E /= No_Error_Msg
1898 and then (not In_Extended_Main_Source_Unit (Errors.Table (E).Sptr)
1901 and then Get_Source_Unit
1902 (Errors.Table (E).Sptr) /= Main_Unit))
1904 if Errors.Table (E).Deleted then
1905 E := Errors.Table (E).Next;
1910 (Errors.Table (E).Line, Errors.Table (E).Sfile, True);
1911 Output_Error_Msgs (E);
1915 -- If output to file, write extra copy of error summary to the
1916 -- output file, and then close it.
1918 if Full_List_File_Name /= null then
1919 Write_Error_Summary;
1921 Close_List_File_Access.all;
1922 Cancel_Special_Output;
1926 -- Verbose mode (error lines only with error flags). Normally this is
1927 -- ignored in full list mode, unless we are listing to a file, in which
1928 -- case we still generate -gnatv output to standard output.
1931 and then (not Full_List or else Full_List_File_Name /= null)
1935 -- Output the header only when Main_Source_File is known
1937 if Main_Source_File /= No_Source_File then
1938 Write_Header (Main_Source_File);
1941 E := First_Error_Msg;
1943 -- Loop through error lines
1945 while E /= No_Error_Msg loop
1946 if Errors.Table (E).Deleted then
1947 E := Errors.Table (E).Next;
1951 (Errors.Table (E).Line, Errors.Table (E).Sfile, True);
1952 Output_Error_Msgs (E);
1957 -- Output error summary if verbose or full list mode
1959 if Verbose_Mode or else Full_List then
1960 Write_Error_Summary;
1965 if Warning_Mode = Treat_As_Error then
1966 Total_Errors_Detected := Total_Errors_Detected + Warnings_Detected;
1967 Warnings_Detected := 0;
1969 end Output_Messages;
1971 ------------------------
1972 -- Output_Source_Line --
1973 ------------------------
1975 procedure Output_Source_Line
1976 (L : Physical_Line_Number;
1977 Sfile : Source_File_Index;
1983 Line_Number_Output : Boolean := False;
1984 -- Set True once line number is output
1986 Empty_Line : Boolean := True;
1987 -- Set False if line includes at least one character
1990 if Sfile /= Current_Error_Source_File then
1991 Write_Str ("==============Error messages for ");
1993 case Sinput.File_Type (Sfile) is
1995 Write_Str ("source");
1997 when Sinput.Config =>
1998 Write_Str ("configuration pragmas");
2001 Write_Str ("symbol definition");
2003 when Sinput.Preproc =>
2004 Write_Str ("preprocessing data");
2007 Write_Str (" file: ");
2008 Write_Name (Full_File_Name (Sfile));
2011 if Num_SRef_Pragmas (Sfile) > 0 then
2012 Write_Str ("--------------Line numbers from file: ");
2013 Write_Name (Full_Ref_Name (Sfile));
2014 Write_Str (" (starting at line ");
2015 Write_Int (Int (First_Mapped_Line (Sfile)));
2020 Current_Error_Source_File := Sfile;
2023 if Errs or List_Pragmas_Mode then
2024 Output_Line_Number (Physical_To_Logical (L, Sfile));
2025 Line_Number_Output := True;
2028 S := Line_Start (L, Sfile);
2031 C := Source_Text (Sfile) (S);
2032 exit when C = ASCII.LF or else C = ASCII.CR or else C = EOF;
2034 -- Deal with matching entry in List_Pragmas table
2037 and then List_Pragmas_Index <= List_Pragmas.Last
2038 and then S = List_Pragmas.Table (List_Pragmas_Index).Ploc
2040 case List_Pragmas.Table (List_Pragmas_Index).Ptyp is
2044 -- Ignore if on line with errors so that error flags
2045 -- get properly listed with the error line .
2048 Write_Char (ASCII.FF);
2052 List_Pragmas_Mode := True;
2054 if not Line_Number_Output then
2055 Output_Line_Number (Physical_To_Logical (L, Sfile));
2056 Line_Number_Output := True;
2063 List_Pragmas_Mode := False;
2066 List_Pragmas_Index := List_Pragmas_Index + 1;
2068 -- Normal case (no matching entry in List_Pragmas table)
2071 if Errs or List_Pragmas_Mode then
2076 Empty_Line := False;
2080 -- If we have output a source line, then add the line terminator, with
2081 -- training spaces preserved (so we output the line exactly as input).
2083 if Line_Number_Output then
2087 Write_Eol_Keep_Blanks;
2090 end Output_Source_Line;
2092 -----------------------------
2093 -- Remove_Warning_Messages --
2094 -----------------------------
2096 procedure Remove_Warning_Messages (N : Node_Id) is
2098 function Check_For_Warning (N : Node_Id) return Traverse_Result;
2099 -- This function checks one node for a possible warning message
2101 function Check_All_Warnings is new Traverse_Func (Check_For_Warning);
2102 -- This defines the traversal operation
2104 -----------------------
2105 -- Check_For_Warning --
2106 -----------------------
2108 function Check_For_Warning (N : Node_Id) return Traverse_Result is
2109 Loc : constant Source_Ptr := Sloc (N);
2112 function To_Be_Removed (E : Error_Msg_Id) return Boolean;
2113 -- Returns True for a message that is to be removed. Also adjusts
2114 -- warning count appropriately.
2120 function To_Be_Removed (E : Error_Msg_Id) return Boolean is
2122 if E /= No_Error_Msg
2124 -- Don't remove if location does not match
2126 and then Errors.Table (E).Optr = Loc
2128 -- Don't remove if not warning/info message. Note that we do
2129 -- not remove style messages here. They are warning messages
2130 -- but not ones we want removed in this context.
2132 and then Errors.Table (E).Warn
2134 -- Don't remove unconditional messages
2136 and then not Errors.Table (E).Uncond
2138 Warnings_Detected := Warnings_Detected - 1;
2141 -- No removal required
2148 -- Start of processing for Check_For_Warnings
2151 while To_Be_Removed (First_Error_Msg) loop
2152 First_Error_Msg := Errors.Table (First_Error_Msg).Next;
2155 if First_Error_Msg = No_Error_Msg then
2156 Last_Error_Msg := No_Error_Msg;
2159 E := First_Error_Msg;
2160 while E /= No_Error_Msg loop
2161 while To_Be_Removed (Errors.Table (E).Next) loop
2162 Errors.Table (E).Next :=
2163 Errors.Table (Errors.Table (E).Next).Next;
2165 if Errors.Table (E).Next = No_Error_Msg then
2166 Last_Error_Msg := E;
2170 E := Errors.Table (E).Next;
2173 if Nkind (N) = N_Raise_Constraint_Error
2174 and then Original_Node (N) /= N
2175 and then No (Condition (N))
2177 -- Warnings may have been posted on subexpressions of the original
2178 -- tree. We place the original node back on the tree to remove
2179 -- those warnings, whose sloc do not match those of any node in
2180 -- the current tree. Given that we are in unreachable code, this
2181 -- modification to the tree is harmless.
2184 Status : Traverse_Final_Result;
2187 if Is_List_Member (N) then
2188 Set_Condition (N, Original_Node (N));
2189 Status := Check_All_Warnings (Condition (N));
2191 Rewrite (N, Original_Node (N));
2192 Status := Check_All_Warnings (N);
2201 end Check_For_Warning;
2203 -- Start of processing for Remove_Warning_Messages
2206 if Warnings_Detected /= 0 then
2208 Discard : Traverse_Final_Result;
2209 pragma Warnings (Off, Discard);
2212 Discard := Check_All_Warnings (N);
2215 end Remove_Warning_Messages;
2217 procedure Remove_Warning_Messages (L : List_Id) is
2220 if Is_Non_Empty_List (L) then
2222 while Present (Stat) loop
2223 Remove_Warning_Messages (Stat);
2227 end Remove_Warning_Messages;
2229 ---------------------------
2230 -- Set_Identifier_Casing --
2231 ---------------------------
2233 procedure Set_Identifier_Casing
2234 (Identifier_Name : System.Address;
2235 File_Name : System.Address)
2237 Ident : constant Big_String_Ptr := To_Big_String_Ptr (Identifier_Name);
2238 File : constant Big_String_Ptr := To_Big_String_Ptr (File_Name);
2241 Desired_Case : Casing_Type := Mixed_Case;
2242 -- Casing required for result. Default value of Mixed_Case is used if
2243 -- for some reason we cannot find the right file name in the table.
2246 -- Get length of file name
2249 while File (Flen + 1) /= ASCII.NUL loop
2253 -- Loop through file names to find matching one. This is a bit slow, but
2254 -- we only do it in error situations so it is not so terrible. Note that
2255 -- if the loop does not exit, then the desired case will be left set to
2256 -- Mixed_Case, this can happen if the name was not in canonical form,
2257 -- and gets canonicalized on VMS. Possibly we could fix this by
2258 -- unconditionally canonicalizing these names ???
2260 for J in 1 .. Last_Source_File loop
2261 Get_Name_String (Full_Debug_Name (J));
2264 and then Name_Buffer (1 .. Name_Len) = String (File (1 .. Flen))
2266 Desired_Case := Identifier_Casing (J);
2271 -- Copy identifier as given to Name_Buffer
2273 for J in Name_Buffer'Range loop
2274 Name_Buffer (J) := Ident (J);
2276 if Name_Buffer (J) = ASCII.NUL then
2282 Set_Casing (Desired_Case);
2283 end Set_Identifier_Casing;
2285 -----------------------
2286 -- Set_Ignore_Errors --
2287 -----------------------
2289 procedure Set_Ignore_Errors (To : Boolean) is
2291 Errors_Must_Be_Ignored := To;
2292 end Set_Ignore_Errors;
2294 ------------------------------
2295 -- Set_Msg_Insertion_Column --
2296 ------------------------------
2298 procedure Set_Msg_Insertion_Column is
2300 if RM_Column_Check then
2301 Set_Msg_Str (" in column ");
2302 Set_Msg_Int (Int (Error_Msg_Col) + 1);
2304 end Set_Msg_Insertion_Column;
2306 ----------------------------
2307 -- Set_Msg_Insertion_Node --
2308 ----------------------------
2310 procedure Set_Msg_Insertion_Node is
2315 Error_Msg_Node_1 = Error
2316 or else Error_Msg_Node_1 = Any_Type;
2318 if Error_Msg_Node_1 = Empty then
2319 Set_Msg_Blank_Conditional;
2320 Set_Msg_Str ("<empty>");
2322 elsif Error_Msg_Node_1 = Error then
2324 Set_Msg_Str ("<error>");
2326 elsif Error_Msg_Node_1 = Standard_Void_Type then
2328 Set_Msg_Str ("procedure name");
2331 Set_Msg_Blank_Conditional;
2335 K := Nkind (Error_Msg_Node_1);
2337 -- If we have operator case, skip quotes since name of operator
2338 -- itself will supply the required quotations. An operator can be an
2339 -- applied use in an expression or an explicit operator symbol, or an
2340 -- identifier whose name indicates it is an operator.
2343 or else K = N_Operator_Symbol
2344 or else K = N_Defining_Operator_Symbol
2345 or else ((K = N_Identifier or else K = N_Defining_Identifier)
2346 and then Is_Operator_Name (Chars (Error_Msg_Node_1)))
2348 Set_Msg_Node (Error_Msg_Node_1);
2350 -- Normal case, not an operator, surround with quotes
2354 Set_Qualification (Error_Msg_Qual_Level, Error_Msg_Node_1);
2355 Set_Msg_Node (Error_Msg_Node_1);
2360 -- The following assignment ensures that a second ampersand insertion
2361 -- character will correspond to the Error_Msg_Node_2 parameter. We
2362 -- suppress possible validity checks in case operating in -gnatVa mode,
2363 -- and Error_Msg_Node_2 is not needed and has not been set.
2366 pragma Suppress (Range_Check);
2368 Error_Msg_Node_1 := Error_Msg_Node_2;
2370 end Set_Msg_Insertion_Node;
2372 --------------------------------------
2373 -- Set_Msg_Insertion_Type_Reference --
2374 --------------------------------------
2376 procedure Set_Msg_Insertion_Type_Reference (Flag : Source_Ptr) is
2382 if Error_Msg_Node_1 = Standard_Void_Type then
2383 Set_Msg_Str ("package or procedure name");
2386 elsif Error_Msg_Node_1 = Standard_Exception_Type then
2387 Set_Msg_Str ("exception name");
2390 elsif Error_Msg_Node_1 = Any_Access
2391 or else Error_Msg_Node_1 = Any_Array
2392 or else Error_Msg_Node_1 = Any_Boolean
2393 or else Error_Msg_Node_1 = Any_Character
2394 or else Error_Msg_Node_1 = Any_Composite
2395 or else Error_Msg_Node_1 = Any_Discrete
2396 or else Error_Msg_Node_1 = Any_Fixed
2397 or else Error_Msg_Node_1 = Any_Integer
2398 or else Error_Msg_Node_1 = Any_Modular
2399 or else Error_Msg_Node_1 = Any_Numeric
2400 or else Error_Msg_Node_1 = Any_Real
2401 or else Error_Msg_Node_1 = Any_Scalar
2402 or else Error_Msg_Node_1 = Any_String
2404 Get_Unqualified_Decoded_Name_String (Chars (Error_Msg_Node_1));
2405 Set_Msg_Name_Buffer;
2408 elsif Error_Msg_Node_1 = Universal_Real then
2409 Set_Msg_Str ("type universal real");
2412 elsif Error_Msg_Node_1 = Universal_Integer then
2413 Set_Msg_Str ("type universal integer");
2416 elsif Error_Msg_Node_1 = Universal_Fixed then
2417 Set_Msg_Str ("type universal fixed");
2421 -- Special case of anonymous array
2423 if Nkind (Error_Msg_Node_1) in N_Entity
2424 and then Is_Array_Type (Error_Msg_Node_1)
2425 and then Present (Related_Array_Object (Error_Msg_Node_1))
2427 Set_Msg_Str ("type of ");
2428 Set_Msg_Node (Related_Array_Object (Error_Msg_Node_1));
2429 Set_Msg_Str (" declared");
2430 Set_Msg_Insertion_Line_Number
2431 (Sloc (Related_Array_Object (Error_Msg_Node_1)), Flag);
2435 -- If we fall through, it is not a special case, so first output
2436 -- the name of the type, preceded by private for a private type
2438 if Is_Private_Type (Error_Msg_Node_1) then
2439 Set_Msg_Str ("private type ");
2441 Set_Msg_Str ("type ");
2444 Ent := Error_Msg_Node_1;
2446 if Is_Internal_Name (Chars (Ent)) then
2447 Unwind_Internal_Type (Ent);
2450 -- Types in Standard are displayed as "Standard.name"
2452 if Sloc (Ent) <= Standard_Location then
2454 Set_Msg_Str ("Standard.");
2459 -- Types in other language defined units are displayed as
2460 -- "package-name.type-name"
2463 Is_Predefined_File_Name (Unit_File_Name (Get_Source_Unit (Ent)))
2465 Get_Unqualified_Decoded_Name_String
2466 (Unit_Name (Get_Source_Unit (Ent)));
2467 Name_Len := Name_Len - 2;
2469 Set_Casing (Mixed_Case);
2470 Set_Msg_Name_Buffer;
2472 Set_Casing (Mixed_Case);
2477 -- All other types display as "type name" defined at line xxx
2478 -- possibly qualified if qualification is requested.
2482 Set_Qualification (Error_Msg_Qual_Level, Ent);
2486 -- If Ent is an anonymous subprogram type, there is no name to print,
2487 -- so remove enclosing quotes.
2489 if Buffer_Ends_With ("""") then
2490 Buffer_Remove ("""");
2496 -- If the original type did not come from a predefined file, add the
2497 -- location where the type was defined.
2499 if Sloc (Error_Msg_Node_1) > Standard_Location
2501 not Is_Predefined_File_Name
2502 (Unit_File_Name (Get_Source_Unit (Error_Msg_Node_1)))
2504 Set_Msg_Str (" defined");
2505 Set_Msg_Insertion_Line_Number (Sloc (Error_Msg_Node_1), Flag);
2507 -- If it did come from a predefined file, deal with the case where
2508 -- this was a file with a generic instantiation from elsewhere.
2511 if Sloc (Error_Msg_Node_1) > Standard_Location then
2513 Iloc : constant Source_Ptr :=
2514 Instantiation_Location (Sloc (Error_Msg_Node_1));
2517 if Iloc /= No_Location
2518 and then not Suppress_Instance_Location
2520 Set_Msg_Str (" from instance");
2521 Set_Msg_Insertion_Line_Number (Iloc, Flag);
2526 end Set_Msg_Insertion_Type_Reference;
2528 ---------------------------------
2529 -- Set_Msg_Insertion_Unit_Name --
2530 ---------------------------------
2532 procedure Set_Msg_Insertion_Unit_Name (Suffix : Boolean := True) is
2534 if Error_Msg_Unit_1 = No_Unit_Name then
2537 elsif Error_Msg_Unit_1 = Error_Unit_Name then
2539 Set_Msg_Str ("<error>");
2542 Get_Unit_Name_String (Error_Msg_Unit_1, Suffix);
2545 Set_Msg_Name_Buffer;
2549 -- The following assignment ensures that a second percent insertion
2550 -- character will correspond to the Error_Msg_Unit_2 parameter. We
2551 -- suppress possible validity checks in case operating in -gnatVa mode,
2552 -- and Error_Msg_Unit_2 is not needed and has not been set.
2555 pragma Suppress (Range_Check);
2557 Error_Msg_Unit_1 := Error_Msg_Unit_2;
2559 end Set_Msg_Insertion_Unit_Name;
2565 procedure Set_Msg_Node (Node : Node_Id) is
2570 case Nkind (Node) is
2571 when N_Designator =>
2572 Set_Msg_Node (Name (Node));
2574 Set_Msg_Node (Identifier (Node));
2577 when N_Defining_Program_Unit_Name =>
2578 Set_Msg_Node (Name (Node));
2580 Set_Msg_Node (Defining_Identifier (Node));
2583 when N_Selected_Component | N_Expanded_Name =>
2584 Set_Msg_Node (Prefix (Node));
2586 Set_Msg_Node (Selector_Name (Node));
2593 -- The only remaining possibilities are identifiers, defining
2594 -- identifiers, pragmas, and pragma argument associations.
2596 if Nkind (Node) = N_Pragma then
2597 Nam := Pragma_Name (Node);
2599 -- The other cases have Chars fields, and we want to test for possible
2600 -- internal names, which generally represent something gone wrong. An
2601 -- exception is the case of internal type names, where we try to find a
2602 -- reasonable external representation for the external name
2604 elsif Is_Internal_Name (Chars (Node))
2606 ((Is_Entity_Name (Node)
2607 and then Present (Entity (Node))
2608 and then Is_Type (Entity (Node)))
2610 (Nkind (Node) = N_Defining_Identifier and then Is_Type (Node)))
2612 if Nkind (Node) = N_Identifier then
2613 Ent := Entity (Node);
2618 -- If the type is the designated type of an access_to_subprogram,
2619 -- there is no name to provide in the call.
2621 if Ekind (Ent) = E_Subprogram_Type then
2624 Unwind_Internal_Type (Ent);
2628 -- If not internal name, just use name in Chars field
2631 Nam := Chars (Node);
2634 -- At this stage, the name to output is in Nam
2636 Get_Unqualified_Decoded_Name_String (Nam);
2638 -- Remove trailing upper case letters from the name (useful for
2639 -- dealing with some cases of internal names.
2641 while Name_Len > 1 and then Name_Buffer (Name_Len) in 'A' .. 'Z' loop
2642 Name_Len := Name_Len - 1;
2645 -- If we have any of the names from standard that start with the
2646 -- characters "any " (e.g. Any_Type), then kill the message since
2647 -- almost certainly it is a junk cascaded message.
2650 and then Name_Buffer (1 .. 4) = "any "
2652 Kill_Message := True;
2655 -- Now we have to set the proper case. If we have a source location
2656 -- then do a check to see if the name in the source is the same name
2657 -- as the name in the Names table, except for possible differences
2658 -- in case, which is the case when we can copy from the source.
2661 Src_Loc : constant Source_Ptr := Sloc (Node);
2662 Sbuffer : Source_Buffer_Ptr;
2664 Src_Ptr : Source_Ptr;
2670 -- For standard locations, always use mixed case
2672 if Src_Loc <= No_Location
2673 or else Sloc (Node) <= No_Location
2675 Set_Casing (Mixed_Case);
2678 -- Determine if the reference we are dealing with corresponds to
2679 -- text at the point of the error reference. This will often be
2680 -- the case for simple identifier references, and is the case
2681 -- where we can copy the spelling from the source.
2683 Sbuffer := Source_Text (Get_Source_File_Index (Src_Loc));
2685 while Ref_Ptr <= Name_Len loop
2687 Fold_Lower (Sbuffer (Src_Ptr)) /=
2688 Fold_Lower (Name_Buffer (Ref_Ptr));
2689 Ref_Ptr := Ref_Ptr + 1;
2690 Src_Ptr := Src_Ptr + 1;
2693 -- If we get through the loop without a mismatch, then output the
2694 -- name the way it is spelled in the source program
2696 if Ref_Ptr > Name_Len then
2699 for J in 1 .. Name_Len loop
2700 Name_Buffer (J) := Sbuffer (Src_Ptr);
2701 Src_Ptr := Src_Ptr + 1;
2704 -- Otherwise set the casing using the default identifier casing
2707 Set_Casing (Identifier_Casing (Flag_Source), Mixed_Case);
2712 Set_Msg_Name_Buffer;
2720 procedure Set_Msg_Text (Text : String; Flag : Source_Ptr) is
2721 C : Character; -- Current character
2722 P : Natural; -- Current index;
2724 procedure Set_Msg_Insertion_Warning;
2725 -- Deal with ? ?? ?x? ?X? insertion sequences
2727 -------------------------------
2728 -- Set_Msg_Insertion_Warning --
2729 -------------------------------
2731 procedure Set_Msg_Insertion_Warning is
2733 Warning_Msg_Char := ' ';
2735 if P <= Text'Last and then Text (P) = '?' then
2736 if Warning_Doc_Switch then
2737 Warning_Msg_Char := '?';
2742 elsif P + 1 <= Text'Last
2743 and then (Text (P) in 'a' .. 'z'
2745 Text (P) in 'A' .. 'Z')
2746 and then Text (P + 1) = '?'
2748 if Warning_Doc_Switch then
2749 Warning_Msg_Char := Text (P);
2754 end Set_Msg_Insertion_Warning;
2756 -- Start of processing for Set_Msg_Text
2759 Manual_Quote_Mode := False;
2761 Flag_Source := Get_Source_File_Index (Flag);
2764 while P <= Text'Last loop
2768 -- Check for insertion character or sequence
2772 if P <= Text'Last and then Text (P) = '%' then
2774 Set_Msg_Insertion_Name_Literal;
2776 Set_Msg_Insertion_Name;
2780 if P <= Text'Last and then Text (P) = '$' then
2782 Set_Msg_Insertion_Unit_Name (Suffix => False);
2784 Set_Msg_Insertion_Unit_Name;
2788 Set_Msg_Insertion_File_Name;
2791 Set_Msg_Insertion_Type_Reference (Flag);
2794 Set_Msg_Insertion_Reserved_Name;
2797 Set_Msg_Insertion_Node;
2800 Set_Msg_Insertion_Line_Number (Error_Msg_Sloc, Flag);
2803 Continuation := True;
2805 if Text (P) = '\' then
2806 Continuation_New_Line := True;
2811 Set_Msg_Insertion_Column;
2814 Set_Msg_Insertion_Run_Time_Name;
2817 Set_Msg_Insertion_Uint;
2820 Manual_Quote_Mode := not Manual_Quote_Mode;
2824 null; -- already dealt with
2827 Set_Msg_Insertion_Warning;
2831 -- If tagging of messages is enabled, and this is a warning,
2832 -- then it is treated as being [enabled by default].
2835 and Warning_Doc_Switch
2837 Warning_Msg_Char := '?';
2841 null; -- already dealt with
2844 Set_Msg_Char (Text (P));
2848 Set_Msg_Str (Error_Msg_String (1 .. Error_Msg_Strlen));
2850 -- Upper case letter
2854 -- Start of reserved word if two or more
2856 if P <= Text'Last and then Text (P) in 'A' .. 'Z' then
2858 Set_Msg_Insertion_Reserved_Word (Text, P);
2860 -- Single upper case letter is just inserted
2866 -- Normal character with no special treatment
2880 procedure Set_Posted (N : Node_Id) is
2884 if Is_Serious_Error then
2886 -- We always set Error_Posted on the node itself
2888 Set_Error_Posted (N);
2890 -- If it is a subexpression, then set Error_Posted on parents up to
2891 -- and including the first non-subexpression construct. This helps
2892 -- avoid cascaded error messages within a single expression.
2898 Set_Error_Posted (P);
2899 exit when Nkind (P) not in N_Subexpr;
2902 -- A special check, if we just posted an error on an attribute
2903 -- definition clause, then also set the entity involved as posted.
2904 -- For example, this stops complaining about the alignment after
2905 -- complaining about the size, which is likely to be useless.
2907 if Nkind (P) = N_Attribute_Definition_Clause then
2908 if Is_Entity_Name (Name (P)) then
2909 Set_Error_Posted (Entity (Name (P)));
2915 -----------------------
2916 -- Set_Qualification --
2917 -----------------------
2919 procedure Set_Qualification (N : Nat; E : Entity_Id) is
2921 if N /= 0 and then Scope (E) /= Standard_Standard then
2922 Set_Qualification (N - 1, Scope (E));
2923 Set_Msg_Node (Scope (E));
2926 end Set_Qualification;
2928 ------------------------
2929 -- Special_Msg_Delete --
2930 ------------------------
2932 -- Is it really right to have all this specialized knowledge in errout?
2934 function Special_Msg_Delete
2936 N : Node_Or_Entity_Id;
2937 E : Node_Or_Entity_Id) return Boolean
2940 -- Never delete messages in -gnatdO mode
2942 if Debug_Flag_OO then
2945 -- Processing for "atomic access cannot be guaranteed"
2947 elsif Msg = "atomic access to & cannot be guaranteed" then
2949 -- When an atomic object refers to a non-atomic type in the same
2950 -- scope, we implicitly make the type atomic. In the non-error case
2951 -- this is surely safe (and in fact prevents an error from occurring
2952 -- if the type is not atomic by default). But if the object cannot be
2953 -- made atomic, then we introduce an extra junk message by this
2954 -- manipulation, which we get rid of here.
2956 -- We identify this case by the fact that it references a type for
2957 -- which Is_Atomic is set, but there is no Atomic pragma setting it.
2960 and then Is_Atomic (E)
2961 and then No (Get_Rep_Pragma (E, Name_Atomic))
2966 -- Processing for "Size too small" messages
2968 elsif Msg = "size for& too small, minimum allowed is ^" then
2970 -- Suppress "size too small" errors in CodePeer mode and SPARK mode,
2971 -- since pragma Pack is also ignored in these configurations.
2973 if CodePeer_Mode or SPARK_Mode then
2976 -- When a size is wrong for a frozen type there is no explicit size
2977 -- clause, and other errors have occurred, suppress the message,
2978 -- since it is likely that this size error is a cascaded result of
2979 -- other errors. The reason we eliminate unfrozen types is that
2980 -- messages issued before the freeze type are for sure OK.
2983 and then Serious_Errors_Detected > 0
2984 and then Nkind (N) /= N_Component_Clause
2985 and then Nkind (Parent (N)) /= N_Component_Clause
2987 No (Get_Attribute_Definition_Clause (E, Attribute_Size))
2989 No (Get_Attribute_Definition_Clause (E, Attribute_Object_Size))
2991 No (Get_Attribute_Definition_Clause (E, Attribute_Value_Size))
2997 -- All special tests complete, so go ahead with message
3000 end Special_Msg_Delete;
3002 --------------------------
3003 -- Unwind_Internal_Type --
3004 --------------------------
3006 procedure Unwind_Internal_Type (Ent : in out Entity_Id) is
3007 Derived : Boolean := False;
3009 Old_Ent : Entity_Id;
3012 -- Undo placement of a quote, since we will put it back later
3014 Mchar := Msg_Buffer (Msglen);
3017 Msglen := Msglen - 1;
3020 -- The loop here deals with recursive types, we are trying to find a
3021 -- related entity that is not an implicit type. Note that the check with
3022 -- Old_Ent stops us from getting "stuck". Also, we don't output the
3023 -- "type derived from" message more than once in the case where we climb
3024 -- up multiple levels.
3029 -- Implicit access type, use directly designated type In Ada 2005,
3030 -- the designated type may be an anonymous access to subprogram, in
3031 -- which case we can only point to its definition.
3033 if Is_Access_Type (Ent) then
3034 if Ekind (Ent) = E_Access_Subprogram_Type
3035 or else Ekind (Ent) = E_Anonymous_Access_Subprogram_Type
3036 or else Is_Access_Protected_Subprogram_Type (Ent)
3038 Ent := Directly_Designated_Type (Ent);
3040 if not Comes_From_Source (Ent) then
3041 if Buffer_Ends_With ("type ") then
3042 Buffer_Remove ("type ");
3045 if Is_Itype (Ent) then
3047 Assoc : constant Node_Id :=
3048 Associated_Node_For_Itype (Ent);
3051 if Nkind (Assoc) in N_Subprogram_Specification then
3053 -- Anonymous access to subprogram in a signature.
3054 -- Indicate the enclosing subprogram.
3058 (Associated_Node_For_Itype (Ent));
3060 ("access to subprogram declared in profile of ");
3063 Set_Msg_Str ("access to subprogram with profile ");
3068 elsif Ekind (Ent) = E_Function then
3069 Set_Msg_Str ("access to function ");
3071 Set_Msg_Str ("access to procedure ");
3076 -- Type is access to object, named or anonymous
3079 Set_Msg_Str ("access to ");
3080 Ent := Directly_Designated_Type (Ent);
3085 elsif Is_Class_Wide_Type (Ent) then
3087 Ent := Root_Type (Ent);
3089 -- Use base type if this is a subtype
3091 elsif Ent /= Base_Type (Ent) then
3092 Buffer_Remove ("type ");
3094 -- Avoid duplication "subtype of subtype of", and also replace
3095 -- "derived from subtype of" simply by "derived from"
3097 if not Buffer_Ends_With ("subtype of ")
3098 and then not Buffer_Ends_With ("derived from ")
3100 Set_Msg_Str ("subtype of ");
3103 Ent := Base_Type (Ent);
3105 -- If this is a base type with a first named subtype, use the first
3106 -- named subtype instead. This is not quite accurate in all cases,
3107 -- but it makes too much noise to be accurate and add 'Base in all
3108 -- cases. Note that we only do this is the first named subtype is not
3109 -- itself an internal name. This avoids the obvious loop (subtype ->
3110 -- basetype -> subtype) which would otherwise occur!)
3114 FST : constant Entity_Id := First_Subtype (Ent);
3117 if not Is_Internal_Name (Chars (FST)) then
3121 -- Otherwise use root type
3125 Buffer_Remove ("type ");
3127 -- Test for "subtype of type derived from" which seems
3128 -- excessive and is replaced by "type derived from".
3130 Buffer_Remove ("subtype of");
3132 -- Avoid duplicated "type derived from type derived from"
3134 if not Buffer_Ends_With ("type derived from ") then
3135 Set_Msg_Str ("type derived from ");
3146 -- If we are stuck in a loop, get out and settle for the internal
3147 -- name after all. In this case we set to kill the message if it is
3148 -- not the first error message (we really try hard not to show the
3149 -- dirty laundry of the implementation to the poor user!)
3151 if Ent = Old_Ent then
3152 Kill_Message := True;
3156 -- Get out if we finally found a non-internal name to use
3158 exit Find when not Is_Internal_Name (Chars (Ent));
3164 end Unwind_Internal_Type;
3170 procedure VMS_Convert is
3180 P := Msg_Buffer'First;
3186 if Msg_Buffer (P) = '-' then
3187 for G in Gnames'Range loop
3188 L := Gnames (G)'Length;
3190 -- See if we have "-ggg switch", where ggg is Gnames entry
3192 if P + L + 7 <= Msglen
3193 and then Msg_Buffer (P + 1 .. P + L) = Gnames (G).all
3194 and then Msg_Buffer (P + L + 1 .. P + L + 7) = " switch"
3196 -- Replace by "/vvv qualifier", where vvv is Vnames entry
3198 N := Vnames (G)'Length;
3199 Msg_Buffer (P + N + 11 .. Msglen + N - L + 3) :=
3200 Msg_Buffer (P + L + 8 .. Msglen);
3201 Msg_Buffer (P) := '/';
3202 Msg_Buffer (P + 1 .. P + N) := Vnames (G).all;
3203 Msg_Buffer (P + N + 1 .. P + N + 10) := " qualifier";
3205 Msglen := Msglen + N - L + 3;