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 return Erroutc.Compilation_Errors;
239 end Compilation_Errors;
245 -- Error_Msg posts a flag at the given location, except that if the
246 -- Flag_Location points within a generic template and corresponds to an
247 -- instantiation of this generic template, then the actual message will be
248 -- posted on the generic instantiation, along with additional messages
249 -- referencing the generic declaration.
251 procedure Error_Msg (Msg : String; Flag_Location : Source_Ptr) is
252 Sindex : Source_File_Index;
253 -- Source index for flag location
255 Orig_Loc : Source_Ptr;
256 -- Original location of Flag_Location (i.e. location in original
257 -- template in instantiation case, otherwise unchanged).
260 -- It is a fatal error to issue an error message when scanning from the
261 -- internal source buffer (see Sinput for further documentation)
263 pragma Assert (Sinput.Source /= Internal_Source_Ptr);
265 -- Return if all errors are to be ignored
267 if Errors_Must_Be_Ignored then
271 -- If we already have messages, and we are trying to place a message at
272 -- No_Location or in package Standard, then just ignore the attempt
273 -- since we assume that what is happening is some cascaded junk. Note
274 -- that this is safe in the sense that proceeding will surely bomb.
276 if Flag_Location < First_Source_Ptr
277 and then Total_Errors_Detected > 0
282 -- Start of processing for new message
284 Sindex := Get_Source_File_Index (Flag_Location);
285 Test_Style_Warning_Serious_Unconditional_Msg (Msg);
286 Orig_Loc := Original_Location (Flag_Location);
288 -- If the current location is in an instantiation, the issue arises of
289 -- whether to post the message on the template or the instantiation.
291 -- The way we decide is to see if we have posted the same message on
292 -- the template when we compiled the template (the template is always
293 -- compiled before any instantiations). For this purpose, we use a
294 -- separate table of messages. The reason we do this is twofold:
296 -- First, the messages can get changed by various processing
297 -- including the insertion of tokens etc, making it hard to
298 -- do the comparison.
300 -- Second, we will suppress a warning on a template if it is not in
301 -- the current extended source unit. That's reasonable and means we
302 -- don't want the warning on the instantiation here either, but it
303 -- does mean that the main error table would not in any case include
306 if Flag_Location = Orig_Loc then
307 Non_Instance_Msgs.Append ((new String'(Msg), Flag_Location));
308 Warn_On_Instance := False;
310 -- Here we have an instance message
313 -- Delete if debug flag off, and this message duplicates a message
314 -- already posted on the corresponding template
316 if not Debug_Flag_GG then
317 for J in Non_Instance_Msgs.First .. Non_Instance_Msgs.Last loop
318 if Msg = Non_Instance_Msgs.Table (J).Msg.all
319 and then Non_Instance_Msgs.Table (J).Loc = Orig_Loc
326 -- No duplicate, so error/warning will be posted on instance
328 Warn_On_Instance := Is_Warning_Msg;
331 -- Ignore warning message that is suppressed for this location. Note
332 -- that style checks are not considered warning messages for this
335 if Is_Warning_Msg and then Warnings_Suppressed (Orig_Loc) then
338 -- For style messages, check too many messages so far
341 and then Maximum_Messages /= 0
342 and then Warnings_Detected >= Maximum_Messages
347 -- The idea at this stage is that we have two kinds of messages
349 -- First, we have those messages that are to be placed as requested at
350 -- Flag_Location. This includes messages that have nothing to do with
351 -- generics, and also messages placed on generic templates that reflect
352 -- an error in the template itself. For such messages we simply call
353 -- Error_Msg_Internal to place the message in the requested location.
355 if Instantiation (Sindex) = No_Location then
356 Error_Msg_Internal (Msg, Flag_Location, Flag_Location, False);
360 -- If we are trying to flag an error in an instantiation, we may have
361 -- a generic contract violation. What we generate in this case is:
363 -- instantiation error at ...
364 -- original error message
368 -- warning: in instantiation at
369 -- warning: original warning message
371 -- All these messages are posted at the location of the top level
372 -- instantiation. If there are nested instantiations, then the
373 -- instantiation error message can be repeated, pointing to each
374 -- of the relevant instantiations.
376 -- Note: the instantiation mechanism is also shared for inlining of
377 -- subprogram bodies when front end inlining is done. In this case the
378 -- messages have the form:
380 -- in inlined body at ...
381 -- original error message
385 -- warning: in inlined body at
386 -- warning: original warning message
388 -- OK, here we have an instantiation error, and we need to generate the
389 -- error on the instantiation, rather than on the template.
392 Actual_Error_Loc : Source_Ptr;
393 -- Location of outer level instantiation in instantiation case, or
394 -- just a copy of Flag_Location in the normal case. This is the
395 -- location where all error messages will actually be posted.
397 Save_Error_Msg_Sloc : constant Source_Ptr := Error_Msg_Sloc;
398 -- Save possible location set for caller's message. We need to use
399 -- Error_Msg_Sloc for the location of the instantiation error but we
400 -- have to preserve a possible original value.
402 X : Source_File_Index;
404 Msg_Cont_Status : Boolean;
405 -- Used to label continuation lines in instantiation case with
406 -- proper Msg_Cont status.
409 -- Loop to find highest level instantiation, where all error
410 -- messages will be placed.
414 Actual_Error_Loc := Instantiation (X);
415 X := Get_Source_File_Index (Actual_Error_Loc);
416 exit when Instantiation (X) = No_Location;
419 -- Since we are generating the messages at the instantiation point in
420 -- any case, we do not want the references to the bad lines in the
421 -- instance to be annotated with the location of the instantiation.
423 Suppress_Instance_Location := True;
424 Msg_Cont_Status := False;
426 -- Loop to generate instantiation messages
428 Error_Msg_Sloc := Flag_Location;
429 X := Get_Source_File_Index (Flag_Location);
430 while Instantiation (X) /= No_Location loop
432 -- Suppress instantiation message on continuation lines
434 if Msg (Msg'First) /= '\' then
436 -- Case of inlined body
438 if Inlined_Body (X) then
439 if Is_Warning_Msg or else Is_Style_Msg then
441 ("?in inlined body #",
442 Actual_Error_Loc, Flag_Location, Msg_Cont_Status);
445 ("error in inlined body #",
446 Actual_Error_Loc, Flag_Location, Msg_Cont_Status);
449 -- Case of generic instantiation
452 if Is_Warning_Msg or else Is_Style_Msg then
454 ("?in instantiation #",
455 Actual_Error_Loc, Flag_Location, Msg_Cont_Status);
458 ("instantiation error #",
459 Actual_Error_Loc, Flag_Location, Msg_Cont_Status);
464 Error_Msg_Sloc := Instantiation (X);
465 X := Get_Source_File_Index (Error_Msg_Sloc);
466 Msg_Cont_Status := True;
469 Suppress_Instance_Location := False;
470 Error_Msg_Sloc := Save_Error_Msg_Sloc;
472 -- Here we output the original message on the outer instantiation
475 (Msg, Actual_Error_Loc, Flag_Location, Msg_Cont_Status);
483 procedure Error_Msg_AP (Msg : String) is
488 -- If we had saved the Scan_Ptr value after scanning the previous
489 -- token, then we would have exactly the right place for putting
490 -- the flag immediately at hand. However, that would add at least
491 -- two instructions to a Scan call *just* to service the possibility
492 -- of an Error_Msg_AP call. So instead we reconstruct that value.
494 -- We have two possibilities, start with Prev_Token_Ptr and skip over
495 -- the current token, which is made harder by the possibility that this
496 -- token may be in error, or start with Token_Ptr and work backwards.
497 -- We used to take the second approach, but it's hard because of
498 -- comments, and harder still because things that look like comments
499 -- can appear inside strings. So now we take the first approach.
501 -- Note: in the case where there is no previous token, Prev_Token_Ptr
502 -- is set to Source_First, which is a reasonable position for the
503 -- error flag in this situation.
505 S1 := Prev_Token_Ptr;
508 -- If the previous token is a string literal, we need a special approach
509 -- since there may be white space inside the literal and we don't want
510 -- to stop on that white space.
512 -- Note: since this is an error recovery issue anyway, it is not worth
513 -- worrying about special UTF_32 line terminator characters here.
515 if Prev_Token = Tok_String_Literal then
519 if Source (S1) = C then
521 exit when Source (S1) /= C;
522 elsif Source (S1) in Line_Terminator then
527 -- Character literal also needs special handling
529 elsif Prev_Token = Tok_Char_Literal then
532 -- Otherwise we search forward for the end of the current token, marked
533 -- by a line terminator, white space, a comment symbol or if we bump
534 -- into the following token (i.e. the current token).
536 -- Again, it is not worth worrying about UTF_32 special line terminator
537 -- characters in this context, since this is only for error recovery.
540 while Source (S1) not in Line_Terminator
541 and then Source (S1) /= ' '
542 and then Source (S1) /= ASCII.HT
543 and then (Source (S1) /= '-' or else Source (S1 + 1) /= '-')
544 and then S1 /= Token_Ptr
550 -- S1 is now set to the location for the flag
559 procedure Error_Msg_BC (Msg : String) is
561 -- If we are at end of file, post the flag after the previous token
563 if Token = Tok_EOF then
566 -- If we are at start of file, post the flag at the current token
568 elsif Token_Ptr = Source_First (Current_Source_File) then
571 -- If the character before the current token is a space or a horizontal
572 -- tab, then we place the flag on this character (in the case of a tab
573 -- we would really like to place it in the "last" character of the tab
574 -- space, but that it too much trouble to worry about).
576 elsif Source (Token_Ptr - 1) = ' '
577 or else Source (Token_Ptr - 1) = ASCII.HT
579 Error_Msg (Msg, Token_Ptr - 1);
581 -- If there is no space or tab before the current token, then there is
582 -- no room to place the flag before the token, so we place it on the
583 -- token instead (this happens for example at the start of a line).
586 Error_Msg (Msg, Token_Ptr);
594 procedure Error_Msg_CRT (Feature : String; N : Node_Id) is
595 CNRT : constant String := " not allowed in no run time mode";
596 CCRT : constant String := " not supported by configuration>";
598 S : String (1 .. Feature'Length + 1 + CCRT'Length);
603 S (2 .. Feature'Length + 1) := Feature;
604 L := Feature'Length + 2;
606 if No_Run_Time_Mode then
607 S (L .. L + CNRT'Length - 1) := CNRT;
608 L := L + CNRT'Length - 1;
610 else pragma Assert (Configurable_Run_Time_Mode);
611 S (L .. L + CCRT'Length - 1) := CCRT;
612 L := L + CCRT'Length - 1;
615 Error_Msg_N (S (1 .. L), N);
616 Configurable_Run_Time_Violations := Configurable_Run_Time_Violations + 1;
623 procedure Error_Msg_PT (Typ : Node_Id; Subp : Node_Id) is
625 -- Error message below needs rewording (remember comma in -gnatj
629 ("first formal of & must be of mode `OUT`, `IN OUT` or " &
630 "access-to-variable", Typ, Subp);
632 ("\in order to be overridden by protected procedure or entry " &
633 "(RM 9.4(11.9/2))", Typ);
640 procedure Error_Msg_F (Msg : String; N : Node_Id) is
642 Error_Msg_NEL (Msg, N, N, Sloc (First_Node (N)));
649 procedure Error_Msg_FE
652 E : Node_Or_Entity_Id)
655 Error_Msg_NEL (Msg, N, E, Sloc (First_Node (N)));
658 ------------------------
659 -- Error_Msg_Internal --
660 ------------------------
662 procedure Error_Msg_Internal
668 Next_Msg : Error_Msg_Id;
669 -- Pointer to next message at insertion point
671 Prev_Msg : Error_Msg_Id;
672 -- Pointer to previous message at insertion point
674 Temp_Msg : Error_Msg_Id;
676 procedure Handle_Serious_Error;
677 -- Internal procedure to do all error message handling for a serious
678 -- error message, other than bumping the error counts and arranging
679 -- for the message to be output.
681 --------------------------
682 -- Handle_Serious_Error --
683 --------------------------
685 procedure Handle_Serious_Error is
687 -- Turn off code generation if not done already
689 if Operating_Mode = Generate_Code then
690 Operating_Mode := Check_Semantics;
691 Expander_Active := False;
694 -- Set the fatal error flag in the unit table unless we are in
695 -- Try_Semantics mode. This stops the semantics from being performed
696 -- if we find a serious error. This is skipped if we are currently
697 -- dealing with the configuration pragma file.
699 if not Try_Semantics and then Current_Source_Unit /= No_Unit then
700 Set_Fatal_Error (Get_Source_Unit (Sptr));
702 end Handle_Serious_Error;
704 -- Start of processing for Error_Msg_Internal
707 if Raise_Exception_On_Error /= 0 then
708 raise Error_Msg_Exception;
711 Continuation := Msg_Cont;
712 Continuation_New_Line := False;
713 Suppress_Message := False;
714 Kill_Message := False;
715 Set_Msg_Text (Msg, Sptr);
717 -- Kill continuation if parent message killed
719 if Continuation and Last_Killed then
723 -- Return without doing anything if message is suppressed
726 and then not All_Errors_Mode
727 and then not Is_Warning_Msg
728 and then not Is_Unconditional_Msg
730 if not Continuation then
737 -- Return without doing anything if message is killed and this is not
738 -- the first error message. The philosophy is that if we get a weird
739 -- error message and we already have had a message, then we hope the
740 -- weird message is a junk cascaded message
743 and then not All_Errors_Mode
744 and then Total_Errors_Detected /= 0
746 if not Continuation then
753 -- Special check for warning message to see if it should be output
755 if Is_Warning_Msg then
757 -- Immediate return if warning message and warnings are suppressed
759 if Warnings_Suppressed (Optr) or else Warnings_Suppressed (Sptr) then
760 Cur_Msg := No_Error_Msg;
764 -- If the flag location is in the main extended source unit then for
765 -- sure we want the warning since it definitely belongs
767 if In_Extended_Main_Source_Unit (Sptr) then
770 -- If the main unit has not been read yet. the warning must be on
771 -- a configuration file: gnat.adc or user-defined. This means we
772 -- are not parsing the main unit yet, so skip following checks.
774 elsif No (Cunit (Main_Unit)) then
777 -- If the flag location is not in the main extended source unit, then
778 -- we want to eliminate the warning, unless it is in the extended
779 -- main code unit and we want warnings on the instance.
781 elsif In_Extended_Main_Code_Unit (Sptr) and then Warn_On_Instance then
784 -- Keep warning if debug flag G set
786 elsif Debug_Flag_GG then
789 -- Keep warning if message text contains !!
791 elsif Has_Double_Exclam then
794 -- Here is where we delete a warning from a with'ed unit
797 Cur_Msg := No_Error_Msg;
799 if not Continuation then
807 -- If message is to be ignored in special ignore message mode, this is
808 -- where we do this special processing, bypassing message output.
810 if Ignore_Errors_Enable > 0 then
811 if Is_Serious_Error then
812 Handle_Serious_Error;
818 -- If error message line length set, and this is a continuation message
819 -- then all we do is to append the text to the text of the last message
820 -- with a comma space separator (eliminating a possible (style) or
823 if Error_Msg_Line_Length /= 0 and then Continuation then
824 Cur_Msg := Errors.Last;
827 Oldm : String_Ptr := Errors.Table (Cur_Msg).Text;
828 Newm : String (1 .. Oldm'Last + 2 + Msglen);
833 -- First copy old message to new one and free it
835 Newm (Oldm'Range) := Oldm.all;
839 -- Remove (style) or info: at start of message
841 if Msglen > 8 and then Msg_Buffer (1 .. 8) = "(style) " then
844 elsif Msglen > 6 and then Msg_Buffer (1 .. 6) = "info: " then
851 -- Now deal with separation between messages. Normally this is
852 -- simply comma space, but there are some special cases.
854 -- If continuation new line, then put actual NL character in msg
856 if Continuation_New_Line then
858 Newm (Newl) := ASCII.LF;
860 -- If continuation message is enclosed in parentheses, then
861 -- special treatment (don't need a comma, and we want to combine
862 -- successive parenthetical remarks into a single one with
863 -- separating commas).
865 elsif Msg_Buffer (M) = '(' and then Msg_Buffer (Msglen) = ')' then
867 -- Case where existing message ends in right paren, remove
868 -- and separate parenthetical remarks with a comma.
870 if Newm (Newl) = ')' then
872 Msg_Buffer (M) := ' ';
874 -- Case where we are adding new parenthetical comment
881 -- Case where continuation not in parens and no new line
884 Newm (Newl + 1 .. Newl + 2) := ", ";
888 -- Append new message
890 Newm (Newl + 1 .. Newl + Msglen - M + 1) :=
891 Msg_Buffer (M .. Msglen);
892 Newl := Newl + Msglen - M + 1;
893 Errors.Table (Cur_Msg).Text := new String'(Newm (1 .. Newl));
895 -- Update warning msg flag and message doc char if needed
897 if Is_Warning_Msg then
898 if not Errors.Table (Cur_Msg).Warn then
899 Errors.Table (Cur_Msg).Warn := True;
900 Errors.Table (Cur_Msg).Warn_Chr := Warning_Msg_Char;
902 elsif Warning_Msg_Char /= ' ' then
903 Errors.Table (Cur_Msg).Warn_Chr := Warning_Msg_Char;
911 -- Here we build a new error object
914 ((Text => new String'(Msg_Buffer (1 .. Msglen)),
915 Next => No_Error_Msg,
916 Prev => No_Error_Msg,
919 Sfile => Get_Source_File_Index (Sptr),
920 Line => Get_Physical_Line_Number (Sptr),
921 Col => Get_Column_Number (Sptr),
922 Warn => Is_Warning_Msg,
923 Warn_Chr => Warning_Msg_Char,
924 Style => Is_Style_Msg,
925 Serious => Is_Serious_Error,
926 Uncond => Is_Unconditional_Msg,
927 Msg_Cont => Continuation,
929 Cur_Msg := Errors.Last;
931 -- If immediate errors mode set, output error message now. Also output
932 -- now if the -d1 debug flag is set (so node number message comes out
933 -- just before actual error message)
935 if Debug_Flag_OO or else Debug_Flag_1 then
938 (Errors.Table (Cur_Msg).Line, Errors.Table (Cur_Msg).Sfile, True);
940 Output_Error_Msgs (Temp_Msg);
942 -- If not in immediate errors mode, then we insert the message in the
943 -- error chain for later output by Finalize. The messages are sorted
944 -- first by unit (main unit comes first), and within a unit by source
945 -- location (earlier flag location first in the chain).
948 -- First a quick check, does this belong at the very end of the chain
949 -- of error messages. This saves a lot of time in the normal case if
950 -- there are lots of messages.
952 if Last_Error_Msg /= No_Error_Msg
953 and then Errors.Table (Cur_Msg).Sfile =
954 Errors.Table (Last_Error_Msg).Sfile
955 and then (Sptr > Errors.Table (Last_Error_Msg).Sptr
957 (Sptr = Errors.Table (Last_Error_Msg).Sptr
959 Optr > Errors.Table (Last_Error_Msg).Optr))
961 Prev_Msg := Last_Error_Msg;
962 Next_Msg := No_Error_Msg;
964 -- Otherwise do a full sequential search for the insertion point
967 Prev_Msg := No_Error_Msg;
968 Next_Msg := First_Error_Msg;
969 while Next_Msg /= No_Error_Msg loop
971 Errors.Table (Cur_Msg).Sfile < Errors.Table (Next_Msg).Sfile;
973 if Errors.Table (Cur_Msg).Sfile =
974 Errors.Table (Next_Msg).Sfile
976 exit when Sptr < Errors.Table (Next_Msg).Sptr
978 (Sptr = Errors.Table (Next_Msg).Sptr
980 Optr < Errors.Table (Next_Msg).Optr);
983 Prev_Msg := Next_Msg;
984 Next_Msg := Errors.Table (Next_Msg).Next;
988 -- Now we insert the new message in the error chain. The insertion
989 -- point for the message is after Prev_Msg and before Next_Msg.
991 -- The possible insertion point for the new message is after Prev_Msg
992 -- and before Next_Msg. However, this is where we do a special check
993 -- for redundant parsing messages, defined as messages posted on the
994 -- same line. The idea here is that probably such messages are junk
995 -- from the parser recovering. In full errors mode, we don't do this
996 -- deletion, but otherwise such messages are discarded at this stage.
998 if Prev_Msg /= No_Error_Msg
999 and then Errors.Table (Prev_Msg).Line =
1000 Errors.Table (Cur_Msg).Line
1001 and then Errors.Table (Prev_Msg).Sfile =
1002 Errors.Table (Cur_Msg).Sfile
1003 and then Compiler_State = Parsing
1004 and then not All_Errors_Mode
1006 -- Don't delete unconditional messages and at this stage, don't
1007 -- delete continuation lines (we attempted to delete those earlier
1008 -- if the parent message was deleted.
1010 if not Errors.Table (Cur_Msg).Uncond
1011 and then not Continuation
1013 -- Don't delete if prev msg is warning and new msg is an error.
1014 -- This is because we don't want a real error masked by a
1015 -- warning. In all other cases (that is parse errors for the
1016 -- same line that are not unconditional) we do delete the
1017 -- message. This helps to avoid junk extra messages from
1018 -- cascaded parsing errors
1020 if not (Errors.Table (Prev_Msg).Warn
1022 Errors.Table (Prev_Msg).Style)
1024 (Errors.Table (Cur_Msg).Warn
1026 Errors.Table (Cur_Msg).Style)
1028 -- All tests passed, delete the message by simply returning
1029 -- without any further processing.
1031 if not Continuation then
1032 Last_Killed := True;
1040 -- Come here if message is to be inserted in the error chain
1042 if not Continuation then
1043 Last_Killed := False;
1046 if Prev_Msg = No_Error_Msg then
1047 First_Error_Msg := Cur_Msg;
1049 Errors.Table (Prev_Msg).Next := Cur_Msg;
1052 Errors.Table (Cur_Msg).Next := Next_Msg;
1054 if Next_Msg = No_Error_Msg then
1055 Last_Error_Msg := Cur_Msg;
1059 -- Bump appropriate statistics count
1061 if Errors.Table (Cur_Msg).Warn or else Errors.Table (Cur_Msg).Style then
1062 Warnings_Detected := Warnings_Detected + 1;
1065 Total_Errors_Detected := Total_Errors_Detected + 1;
1067 if Errors.Table (Cur_Msg).Serious then
1068 Serious_Errors_Detected := Serious_Errors_Detected + 1;
1069 Handle_Serious_Error;
1073 -- If too many warnings turn off warnings
1075 if Maximum_Messages /= 0 then
1076 if Warnings_Detected = Maximum_Messages then
1077 Warning_Mode := Suppress;
1080 -- If too many errors abandon compilation
1082 if Total_Errors_Detected = Maximum_Messages then
1083 raise Unrecoverable_Error;
1086 end Error_Msg_Internal;
1092 procedure Error_Msg_N (Msg : String; N : Node_Or_Entity_Id) is
1094 Error_Msg_NEL (Msg, N, N, Sloc (N));
1101 procedure Error_Msg_NE
1103 N : Node_Or_Entity_Id;
1104 E : Node_Or_Entity_Id)
1107 Error_Msg_NEL (Msg, N, E, Sloc (N));
1114 procedure Error_Msg_NEL
1116 N : Node_Or_Entity_Id;
1117 E : Node_Or_Entity_Id;
1118 Flag_Location : Source_Ptr)
1121 if Special_Msg_Delete (Msg, N, E) then
1125 Test_Style_Warning_Serious_Unconditional_Msg (Msg);
1127 -- Special handling for warning messages
1129 if Is_Warning_Msg then
1131 -- Suppress if no warnings set for either entity or node
1133 if No_Warnings (N) or else No_Warnings (E) then
1135 -- Disable any continuation messages as well
1137 Last_Killed := True;
1141 -- Suppress if inside loop that is known to be null or is probably
1142 -- null (case where loop executes only if invalid values present).
1143 -- In either case warnings in the loop are likely to be junk.
1150 while Present (P) loop
1151 if Nkind (P) = N_Loop_Statement
1152 and then Suppress_Loop_Warnings (P)
1162 -- Test for message to be output
1165 or else Is_Unconditional_Msg
1166 or else Is_Warning_Msg
1168 or else (Msg (Msg'First) = '\' and then not Last_Killed)
1171 Error_Msg_Node_1 := E;
1172 Error_Msg (Msg, Flag_Location);
1175 Last_Killed := True;
1178 if not (Is_Warning_Msg or Is_Style_Msg) then
1187 procedure Error_Msg_NW
1190 N : Node_Or_Entity_Id)
1194 and then In_Extended_Main_Source_Unit (N)
1195 and then Comes_From_Source (N)
1197 Error_Msg_NEL (Msg, N, N, Sloc (N));
1205 procedure Error_Msg_S (Msg : String) is
1207 Error_Msg (Msg, Scan_Ptr);
1214 procedure Error_Msg_SC (Msg : String) is
1216 -- If we are at end of file, post the flag after the previous token
1218 if Token = Tok_EOF then
1221 -- For all other cases the message is posted at the current token
1225 Error_Msg (Msg, Token_Ptr);
1233 procedure Error_Msg_SP (Msg : String) is
1235 -- Note: in the case where there is no previous token, Prev_Token_Ptr
1236 -- is set to Source_First, which is a reasonable position for the
1237 -- error flag in this situation
1239 Error_Msg (Msg, Prev_Token_Ptr);
1246 procedure Finalize (Last_Call : Boolean) is
1251 procedure Delete_Warning (E : Error_Msg_Id);
1252 -- Delete a message if not already deleted and adjust warning count
1254 --------------------
1255 -- Delete_Warning --
1256 --------------------
1258 procedure Delete_Warning (E : Error_Msg_Id) is
1260 if not Errors.Table (E).Deleted then
1261 Errors.Table (E).Deleted := True;
1262 Warnings_Detected := Warnings_Detected - 1;
1266 -- Start of message for Finalize
1269 -- Set Prev pointers
1271 Cur := First_Error_Msg;
1272 while Cur /= No_Error_Msg loop
1273 Nxt := Errors.Table (Cur).Next;
1274 exit when Nxt = No_Error_Msg;
1275 Errors.Table (Nxt).Prev := Cur;
1279 -- Eliminate any duplicated error messages from the list. This is
1280 -- done after the fact to avoid problems with Change_Error_Text.
1282 Cur := First_Error_Msg;
1283 while Cur /= No_Error_Msg loop
1284 Nxt := Errors.Table (Cur).Next;
1287 while F /= No_Error_Msg
1288 and then Errors.Table (F).Sptr = Errors.Table (Cur).Sptr
1290 Check_Duplicate_Message (Cur, F);
1291 F := Errors.Table (F).Next;
1297 -- Mark any messages suppressed by specific warnings as Deleted
1299 Cur := First_Error_Msg;
1300 while Cur /= No_Error_Msg loop
1302 CE : Error_Msg_Object renames Errors.Table (Cur);
1305 if (CE.Warn and not CE.Deleted)
1307 (Warning_Specifically_Suppressed (CE.Sptr, CE.Text)
1309 Warning_Specifically_Suppressed (CE.Optr, CE.Text))
1311 Delete_Warning (Cur);
1313 -- If this is a continuation, delete previous messages
1316 while Errors.Table (F).Msg_Cont loop
1317 F := Errors.Table (F).Prev;
1321 -- Delete any following continuations
1325 F := Errors.Table (F).Next;
1326 exit when F = No_Error_Msg;
1327 exit when not Errors.Table (F).Msg_Cont;
1333 Cur := Errors.Table (Cur).Next;
1336 Finalize_Called := True;
1338 -- Check consistency of specific warnings (may add warnings). We only
1339 -- do this on the last call, after all possible warnings are posted.
1342 Validate_Specific_Warnings (Error_Msg'Access);
1350 function First_Node (C : Node_Id) return Node_Id is
1351 Orig : constant Node_Id := Original_Node (C);
1352 Loc : constant Source_Ptr := Sloc (Orig);
1353 Sfile : constant Source_File_Index := Get_Source_File_Index (Loc);
1357 function Test_Earlier (N : Node_Id) return Traverse_Result;
1358 -- Function applied to every node in the construct
1360 procedure Search_Tree_First is new Traverse_Proc (Test_Earlier);
1361 -- Create traversal procedure
1367 function Test_Earlier (N : Node_Id) return Traverse_Result is
1368 Norig : constant Node_Id := Original_Node (N);
1369 Loc : constant Source_Ptr := Sloc (Norig);
1372 -- Check for earlier
1376 -- Ignore nodes with no useful location information
1378 and then Loc /= Standard_Location
1379 and then Loc /= No_Location
1381 -- Ignore nodes from a different file. This ensures against cases
1382 -- of strange foreign code somehow being present. We don't want
1383 -- wild placement of messages if that happens.
1385 and then Get_Source_File_Index (Loc) = Sfile
1394 -- Start of processing for First_Node
1397 if Nkind (Orig) in N_Subexpr then
1400 Search_Tree_First (Orig);
1412 function First_Sloc (N : Node_Id) return Source_Ptr is
1413 SI : constant Source_File_Index := Source_Index (Get_Source_Unit (N));
1414 SF : constant Source_Ptr := Source_First (SI);
1419 F := First_Node (N);
1422 -- The following circuit is a bit subtle. When we have parenthesized
1423 -- expressions, then the Sloc will not record the location of the paren,
1424 -- but we would like to post the flag on the paren. So what we do is to
1425 -- crawl up the tree from the First_Node, adjusting the Sloc value for
1426 -- any parentheses we know are present. Yes, we know this circuit is not
1427 -- 100% reliable (e.g. because we don't record all possible paren level
1428 -- values), but this is only for an error message so it is good enough.
1431 Paren_Loop : for J in 1 .. Paren_Count (F) loop
1433 -- We don't look more than 12 characters behind the current
1434 -- location, and in any case not past the front of the source.
1436 Search_Loop : for K in 1 .. 12 loop
1437 exit Search_Loop when S = SF;
1439 if Source_Text (SI) (S - 1) = '(' then
1443 elsif Source_Text (SI) (S - 1) <= ' ' then
1449 end loop Search_Loop;
1450 end loop Paren_Loop;
1452 exit Node_Loop when F = N;
1454 exit Node_Loop when Nkind (F) not in N_Subexpr;
1460 -----------------------
1461 -- Get_Ignore_Errors --
1462 -----------------------
1464 function Get_Ignore_Errors return Boolean is
1466 return Errors_Must_Be_Ignored;
1467 end Get_Ignore_Errors;
1473 procedure Initialize is
1476 First_Error_Msg := No_Error_Msg;
1477 Last_Error_Msg := No_Error_Msg;
1478 Serious_Errors_Detected := 0;
1479 Total_Errors_Detected := 0;
1480 Warnings_Detected := 0;
1481 Cur_Msg := No_Error_Msg;
1484 -- Initialize warnings table, if all warnings are suppressed, supply an
1485 -- initial dummy entry covering all possible source locations.
1488 Specific_Warnings.Init;
1490 if Warning_Mode = Suppress then
1492 ((Start => Source_Ptr'First, Stop => Source_Ptr'Last));
1500 function No_Warnings (N : Node_Or_Entity_Id) return Boolean is
1502 if Error_Posted (N) then
1505 elsif Nkind (N) in N_Entity and then Has_Warnings_Off (N) then
1508 elsif Is_Entity_Name (N)
1509 and then Present (Entity (N))
1510 and then Has_Warnings_Off (Entity (N))
1523 function OK_Node (N : Node_Id) return Boolean is
1524 K : constant Node_Kind := Nkind (N);
1527 if Error_Posted (N) then
1530 elsif K in N_Has_Etype
1531 and then Present (Etype (N))
1532 and then Error_Posted (Etype (N))
1537 or else K = N_Attribute_Reference
1538 or else K = N_Character_Literal
1539 or else K = N_Expanded_Name
1540 or else K = N_Identifier
1541 or else K = N_Operator_Symbol)
1542 and then Present (Entity (N))
1543 and then Error_Posted (Entity (N))
1551 ---------------------
1552 -- Output_Messages --
1553 ---------------------
1555 procedure Output_Messages is
1559 procedure Write_Error_Summary;
1560 -- Write error summary
1562 procedure Write_Header (Sfile : Source_File_Index);
1563 -- Write header line (compiling or checking given file)
1565 procedure Write_Max_Errors;
1566 -- Write message if max errors reached
1568 -------------------------
1569 -- Write_Error_Summary --
1570 -------------------------
1572 procedure Write_Error_Summary is
1574 -- Extra blank line if error messages or source listing were output
1576 if Total_Errors_Detected + Warnings_Detected > 0
1582 -- Message giving number of lines read and number of errors detected.
1583 -- This normally goes to Standard_Output. The exception is when brief
1584 -- mode is not set, verbose mode (or full list mode) is set, and
1585 -- there are errors. In this case we send the message to standard
1586 -- error to make sure that *something* appears on standard error in
1587 -- an error situation.
1589 -- Formerly, only the "# errors" suffix was sent to stderr, whereas
1590 -- "# lines:" appeared on stdout. This caused problems on VMS when
1591 -- the stdout buffer was flushed, giving an extra line feed after
1594 if Total_Errors_Detected + Warnings_Detected /= 0
1595 and then not Brief_Output
1596 and then (Verbose_Mode or Full_List)
1601 -- Message giving total number of lines
1604 Write_Int (Num_Source_Lines (Main_Source_File));
1606 if Num_Source_Lines (Main_Source_File) = 1 then
1607 Write_Str (" line: ");
1609 Write_Str (" lines: ");
1612 if Total_Errors_Detected = 0 then
1613 Write_Str ("No errors");
1615 elsif Total_Errors_Detected = 1 then
1616 Write_Str ("1 error");
1619 Write_Int (Total_Errors_Detected);
1620 Write_Str (" errors");
1623 if Warnings_Detected /= 0 then
1625 Write_Int (Warnings_Detected);
1626 Write_Str (" warning");
1628 if Warnings_Detected /= 1 then
1632 if Warning_Mode = Treat_As_Error then
1633 Write_Str (" (treated as error");
1635 if Warnings_Detected /= 1 then
1644 Set_Standard_Output;
1645 end Write_Error_Summary;
1651 procedure Write_Header (Sfile : Source_File_Index) is
1653 if Verbose_Mode or Full_List then
1654 if Original_Operating_Mode = Generate_Code then
1655 Write_Str ("Compiling: ");
1657 Write_Str ("Checking: ");
1660 Write_Name (Full_File_Name (Sfile));
1662 if not Debug_Flag_7 then
1663 Write_Str (" (source file time stamp: ");
1664 Write_Time_Stamp (Sfile);
1672 ----------------------
1673 -- Write_Max_Errors --
1674 ----------------------
1676 procedure Write_Max_Errors is
1678 if Maximum_Messages /= 0 then
1679 if Warnings_Detected >= Maximum_Messages then
1681 Write_Line ("maximum number of warnings output");
1682 Write_Line ("any further warnings suppressed");
1683 Set_Standard_Output;
1686 -- If too many errors print message
1688 if Total_Errors_Detected >= Maximum_Messages then
1690 Write_Line ("fatal error: maximum number of errors detected");
1691 Set_Standard_Output;
1694 end Write_Max_Errors;
1696 -- Start of processing for Output_Messages
1699 -- Error if Finalize has not been called
1701 if not Finalize_Called then
1702 raise Program_Error;
1705 -- Reset current error source file if the main unit has a pragma
1706 -- Source_Reference. This ensures outputting the proper name of
1707 -- the source file in this situation.
1709 if Main_Source_File = No_Source_File
1710 or else Num_SRef_Pragmas (Main_Source_File) /= 0
1712 Current_Error_Source_File := No_Source_File;
1717 if Brief_Output or (not Full_List and not Verbose_Mode) then
1720 E := First_Error_Msg;
1721 while E /= No_Error_Msg loop
1722 if not Errors.Table (E).Deleted and then not Debug_Flag_KK then
1723 if Full_Path_Name_For_Brief_Errors then
1724 Write_Name (Full_Ref_Name (Errors.Table (E).Sfile));
1726 Write_Name (Reference_Name (Errors.Table (E).Sfile));
1730 Write_Int (Int (Physical_To_Logical
1731 (Errors.Table (E).Line,
1732 Errors.Table (E).Sfile)));
1735 if Errors.Table (E).Col < 10 then
1739 Write_Int (Int (Errors.Table (E).Col));
1741 Output_Msg_Text (E);
1745 E := Errors.Table (E).Next;
1748 Set_Standard_Output;
1751 -- Full source listing case
1754 List_Pragmas_Index := 1;
1755 List_Pragmas_Mode := True;
1756 E := First_Error_Msg;
1758 -- Normal case, to stdout (copyright notice already output)
1760 if Full_List_File_Name = null then
1761 if not Debug_Flag_7 then
1768 Create_List_File_Access.all (Full_List_File_Name.all);
1769 Set_Special_Output (Write_List_Info_Access.all'Access);
1771 -- Write copyright notice to file
1773 if not Debug_Flag_7 then
1774 Write_Str ("GNAT ");
1775 Write_Str (Gnat_Version_String);
1777 Write_Str ("Copyright 1992-" &
1779 ", Free Software Foundation, Inc.");
1784 -- First list extended main source file units with errors
1786 for U in Main_Unit .. Last_Unit loop
1787 if In_Extended_Main_Source_Unit (Cunit_Entity (U))
1789 -- If debug flag d.m is set, only the main source is listed
1791 and then (U = Main_Unit or else not Debug_Flag_Dot_M)
1793 -- If the unit of the entity does not come from source, it is
1794 -- an implicit subprogram declaration for a child subprogram.
1795 -- Do not emit errors for it, they are listed with the body.
1798 (No (Cunit_Entity (U))
1799 or else Comes_From_Source (Cunit_Entity (U))
1800 or else not Is_Subprogram (Cunit_Entity (U)))
1803 Sfile : constant Source_File_Index := Source_Index (U);
1807 Write_Header (Sfile);
1810 -- Normally, we don't want an "error messages from file"
1811 -- message when listing the entire file, so we set the
1812 -- current source file as the current error source file.
1813 -- However, the old style of doing things was to list this
1814 -- message if pragma Source_Reference is present, even for
1815 -- the main unit. Since the purpose of the -gnatd.m switch
1816 -- is to duplicate the old behavior, we skip the reset if
1817 -- this debug flag is set.
1819 if not Debug_Flag_Dot_M then
1820 Current_Error_Source_File := Sfile;
1823 for N in 1 .. Last_Source_Line (Sfile) loop
1824 while E /= No_Error_Msg
1825 and then Errors.Table (E).Deleted
1827 E := Errors.Table (E).Next;
1832 and then Errors.Table (E).Line = N
1833 and then Errors.Table (E).Sfile = Sfile;
1835 Output_Source_Line (N, Sfile, Err_Flag);
1838 Output_Error_Msgs (E);
1840 if not Debug_Flag_2 then
1849 -- Then output errors, if any, for subsidiary units not in the
1850 -- main extended unit.
1852 -- Note: if debug flag d.m set, include errors for any units other
1853 -- than the main unit in the extended source unit (e.g. spec and
1854 -- subunits for a body).
1856 while E /= No_Error_Msg
1857 and then (not In_Extended_Main_Source_Unit (Errors.Table (E).Sptr)
1860 and then Get_Source_Unit
1861 (Errors.Table (E).Sptr) /= Main_Unit))
1863 if Errors.Table (E).Deleted then
1864 E := Errors.Table (E).Next;
1869 (Errors.Table (E).Line, Errors.Table (E).Sfile, True);
1870 Output_Error_Msgs (E);
1874 -- If output to file, write extra copy of error summary to the
1875 -- output file, and then close it.
1877 if Full_List_File_Name /= null then
1878 Write_Error_Summary;
1880 Close_List_File_Access.all;
1881 Cancel_Special_Output;
1885 -- Verbose mode (error lines only with error flags). Normally this is
1886 -- ignored in full list mode, unless we are listing to a file, in which
1887 -- case we still generate -gnatv output to standard output.
1890 and then (not Full_List or else Full_List_File_Name /= null)
1893 Write_Header (Main_Source_File);
1894 E := First_Error_Msg;
1896 -- Loop through error lines
1898 while E /= No_Error_Msg loop
1899 if Errors.Table (E).Deleted then
1900 E := Errors.Table (E).Next;
1904 (Errors.Table (E).Line, Errors.Table (E).Sfile, True);
1905 Output_Error_Msgs (E);
1910 -- Output error summary if verbose or full list mode
1912 if Verbose_Mode or else Full_List then
1913 Write_Error_Summary;
1918 if Warning_Mode = Treat_As_Error then
1919 Total_Errors_Detected := Total_Errors_Detected + Warnings_Detected;
1920 Warnings_Detected := 0;
1922 end Output_Messages;
1924 ------------------------
1925 -- Output_Source_Line --
1926 ------------------------
1928 procedure Output_Source_Line
1929 (L : Physical_Line_Number;
1930 Sfile : Source_File_Index;
1936 Line_Number_Output : Boolean := False;
1937 -- Set True once line number is output
1939 Empty_Line : Boolean := True;
1940 -- Set False if line includes at least one character
1943 if Sfile /= Current_Error_Source_File then
1944 Write_Str ("==============Error messages for ");
1946 case Sinput.File_Type (Sfile) is
1948 Write_Str ("source");
1950 when Sinput.Config =>
1951 Write_Str ("configuration pragmas");
1954 Write_Str ("symbol definition");
1956 when Sinput.Preproc =>
1957 Write_Str ("preprocessing data");
1960 Write_Str (" file: ");
1961 Write_Name (Full_File_Name (Sfile));
1964 if Num_SRef_Pragmas (Sfile) > 0 then
1965 Write_Str ("--------------Line numbers from file: ");
1966 Write_Name (Full_Ref_Name (Sfile));
1967 Write_Str (" (starting at line ");
1968 Write_Int (Int (First_Mapped_Line (Sfile)));
1973 Current_Error_Source_File := Sfile;
1976 if Errs or List_Pragmas_Mode then
1977 Output_Line_Number (Physical_To_Logical (L, Sfile));
1978 Line_Number_Output := True;
1981 S := Line_Start (L, Sfile);
1984 C := Source_Text (Sfile) (S);
1985 exit when C = ASCII.LF or else C = ASCII.CR or else C = EOF;
1987 -- Deal with matching entry in List_Pragmas table
1990 and then List_Pragmas_Index <= List_Pragmas.Last
1991 and then S = List_Pragmas.Table (List_Pragmas_Index).Ploc
1993 case List_Pragmas.Table (List_Pragmas_Index).Ptyp is
1997 -- Ignore if on line with errors so that error flags
1998 -- get properly listed with the error line .
2001 Write_Char (ASCII.FF);
2005 List_Pragmas_Mode := True;
2007 if not Line_Number_Output then
2008 Output_Line_Number (Physical_To_Logical (L, Sfile));
2009 Line_Number_Output := True;
2016 List_Pragmas_Mode := False;
2019 List_Pragmas_Index := List_Pragmas_Index + 1;
2021 -- Normal case (no matching entry in List_Pragmas table)
2024 if Errs or List_Pragmas_Mode then
2029 Empty_Line := False;
2033 -- If we have output a source line, then add the line terminator, with
2034 -- training spaces preserved (so we output the line exactly as input).
2036 if Line_Number_Output then
2040 Write_Eol_Keep_Blanks;
2043 end Output_Source_Line;
2045 -----------------------------
2046 -- Remove_Warning_Messages --
2047 -----------------------------
2049 procedure Remove_Warning_Messages (N : Node_Id) is
2051 function Check_For_Warning (N : Node_Id) return Traverse_Result;
2052 -- This function checks one node for a possible warning message
2054 function Check_All_Warnings is new Traverse_Func (Check_For_Warning);
2055 -- This defines the traversal operation
2057 -----------------------
2058 -- Check_For_Warning --
2059 -----------------------
2061 function Check_For_Warning (N : Node_Id) return Traverse_Result is
2062 Loc : constant Source_Ptr := Sloc (N);
2065 function To_Be_Removed (E : Error_Msg_Id) return Boolean;
2066 -- Returns True for a message that is to be removed. Also adjusts
2067 -- warning count appropriately.
2073 function To_Be_Removed (E : Error_Msg_Id) return Boolean is
2075 if E /= No_Error_Msg
2077 -- Don't remove if location does not match
2079 and then Errors.Table (E).Optr = Loc
2081 -- Don't remove if not warning/info message. Note that we do
2082 -- not remove style messages here. They are warning messages
2083 -- but not ones we want removed in this context.
2085 and then Errors.Table (E).Warn
2087 -- Don't remove unconditional messages
2089 and then not Errors.Table (E).Uncond
2091 Warnings_Detected := Warnings_Detected - 1;
2094 -- No removal required
2101 -- Start of processing for Check_For_Warnings
2104 while To_Be_Removed (First_Error_Msg) loop
2105 First_Error_Msg := Errors.Table (First_Error_Msg).Next;
2108 if First_Error_Msg = No_Error_Msg then
2109 Last_Error_Msg := No_Error_Msg;
2112 E := First_Error_Msg;
2113 while E /= No_Error_Msg loop
2114 while To_Be_Removed (Errors.Table (E).Next) loop
2115 Errors.Table (E).Next :=
2116 Errors.Table (Errors.Table (E).Next).Next;
2118 if Errors.Table (E).Next = No_Error_Msg then
2119 Last_Error_Msg := E;
2123 E := Errors.Table (E).Next;
2126 if Nkind (N) = N_Raise_Constraint_Error
2127 and then Original_Node (N) /= N
2128 and then No (Condition (N))
2130 -- Warnings may have been posted on subexpressions of the original
2131 -- tree. We place the original node back on the tree to remove
2132 -- those warnings, whose sloc do not match those of any node in
2133 -- the current tree. Given that we are in unreachable code, this
2134 -- modification to the tree is harmless.
2137 Status : Traverse_Final_Result;
2140 if Is_List_Member (N) then
2141 Set_Condition (N, Original_Node (N));
2142 Status := Check_All_Warnings (Condition (N));
2144 Rewrite (N, Original_Node (N));
2145 Status := Check_All_Warnings (N);
2154 end Check_For_Warning;
2156 -- Start of processing for Remove_Warning_Messages
2159 if Warnings_Detected /= 0 then
2161 Discard : Traverse_Final_Result;
2162 pragma Warnings (Off, Discard);
2165 Discard := Check_All_Warnings (N);
2168 end Remove_Warning_Messages;
2170 procedure Remove_Warning_Messages (L : List_Id) is
2173 if Is_Non_Empty_List (L) then
2175 while Present (Stat) loop
2176 Remove_Warning_Messages (Stat);
2180 end Remove_Warning_Messages;
2182 ---------------------------
2183 -- Set_Identifier_Casing --
2184 ---------------------------
2186 procedure Set_Identifier_Casing
2187 (Identifier_Name : System.Address;
2188 File_Name : System.Address)
2190 Ident : constant Big_String_Ptr := To_Big_String_Ptr (Identifier_Name);
2191 File : constant Big_String_Ptr := To_Big_String_Ptr (File_Name);
2194 Desired_Case : Casing_Type := Mixed_Case;
2195 -- Casing required for result. Default value of Mixed_Case is used if
2196 -- for some reason we cannot find the right file name in the table.
2199 -- Get length of file name
2202 while File (Flen + 1) /= ASCII.NUL loop
2206 -- Loop through file names to find matching one. This is a bit slow, but
2207 -- we only do it in error situations so it is not so terrible. Note that
2208 -- if the loop does not exit, then the desired case will be left set to
2209 -- Mixed_Case, this can happen if the name was not in canonical form,
2210 -- and gets canonicalized on VMS. Possibly we could fix this by
2211 -- unconditionally canonicalizing these names ???
2213 for J in 1 .. Last_Source_File loop
2214 Get_Name_String (Full_Debug_Name (J));
2217 and then Name_Buffer (1 .. Name_Len) = String (File (1 .. Flen))
2219 Desired_Case := Identifier_Casing (J);
2224 -- Copy identifier as given to Name_Buffer
2226 for J in Name_Buffer'Range loop
2227 Name_Buffer (J) := Ident (J);
2229 if Name_Buffer (J) = ASCII.NUL then
2235 Set_Casing (Desired_Case);
2236 end Set_Identifier_Casing;
2238 -----------------------
2239 -- Set_Ignore_Errors --
2240 -----------------------
2242 procedure Set_Ignore_Errors (To : Boolean) is
2244 Errors_Must_Be_Ignored := To;
2245 end Set_Ignore_Errors;
2247 ------------------------------
2248 -- Set_Msg_Insertion_Column --
2249 ------------------------------
2251 procedure Set_Msg_Insertion_Column is
2253 if RM_Column_Check then
2254 Set_Msg_Str (" in column ");
2255 Set_Msg_Int (Int (Error_Msg_Col) + 1);
2257 end Set_Msg_Insertion_Column;
2259 ----------------------------
2260 -- Set_Msg_Insertion_Node --
2261 ----------------------------
2263 procedure Set_Msg_Insertion_Node is
2268 Error_Msg_Node_1 = Error
2269 or else Error_Msg_Node_1 = Any_Type;
2271 if Error_Msg_Node_1 = Empty then
2272 Set_Msg_Blank_Conditional;
2273 Set_Msg_Str ("<empty>");
2275 elsif Error_Msg_Node_1 = Error then
2277 Set_Msg_Str ("<error>");
2279 elsif Error_Msg_Node_1 = Standard_Void_Type then
2281 Set_Msg_Str ("procedure name");
2284 Set_Msg_Blank_Conditional;
2288 K := Nkind (Error_Msg_Node_1);
2290 -- If we have operator case, skip quotes since name of operator
2291 -- itself will supply the required quotations. An operator can be an
2292 -- applied use in an expression or an explicit operator symbol, or an
2293 -- identifier whose name indicates it is an operator.
2296 or else K = N_Operator_Symbol
2297 or else K = N_Defining_Operator_Symbol
2298 or else ((K = N_Identifier or else K = N_Defining_Identifier)
2299 and then Is_Operator_Name (Chars (Error_Msg_Node_1)))
2301 Set_Msg_Node (Error_Msg_Node_1);
2303 -- Normal case, not an operator, surround with quotes
2307 Set_Qualification (Error_Msg_Qual_Level, Error_Msg_Node_1);
2308 Set_Msg_Node (Error_Msg_Node_1);
2313 -- The following assignment ensures that a second ampersand insertion
2314 -- character will correspond to the Error_Msg_Node_2 parameter. We
2315 -- suppress possible validity checks in case operating in -gnatVa mode,
2316 -- and Error_Msg_Node_2 is not needed and has not been set.
2319 pragma Suppress (Range_Check);
2321 Error_Msg_Node_1 := Error_Msg_Node_2;
2323 end Set_Msg_Insertion_Node;
2325 --------------------------------------
2326 -- Set_Msg_Insertion_Type_Reference --
2327 --------------------------------------
2329 procedure Set_Msg_Insertion_Type_Reference (Flag : Source_Ptr) is
2335 if Error_Msg_Node_1 = Standard_Void_Type then
2336 Set_Msg_Str ("package or procedure name");
2339 elsif Error_Msg_Node_1 = Standard_Exception_Type then
2340 Set_Msg_Str ("exception name");
2343 elsif Error_Msg_Node_1 = Any_Access
2344 or else Error_Msg_Node_1 = Any_Array
2345 or else Error_Msg_Node_1 = Any_Boolean
2346 or else Error_Msg_Node_1 = Any_Character
2347 or else Error_Msg_Node_1 = Any_Composite
2348 or else Error_Msg_Node_1 = Any_Discrete
2349 or else Error_Msg_Node_1 = Any_Fixed
2350 or else Error_Msg_Node_1 = Any_Integer
2351 or else Error_Msg_Node_1 = Any_Modular
2352 or else Error_Msg_Node_1 = Any_Numeric
2353 or else Error_Msg_Node_1 = Any_Real
2354 or else Error_Msg_Node_1 = Any_Scalar
2355 or else Error_Msg_Node_1 = Any_String
2357 Get_Unqualified_Decoded_Name_String (Chars (Error_Msg_Node_1));
2358 Set_Msg_Name_Buffer;
2361 elsif Error_Msg_Node_1 = Universal_Real then
2362 Set_Msg_Str ("type universal real");
2365 elsif Error_Msg_Node_1 = Universal_Integer then
2366 Set_Msg_Str ("type universal integer");
2369 elsif Error_Msg_Node_1 = Universal_Fixed then
2370 Set_Msg_Str ("type universal fixed");
2374 -- Special case of anonymous array
2376 if Nkind (Error_Msg_Node_1) in N_Entity
2377 and then Is_Array_Type (Error_Msg_Node_1)
2378 and then Present (Related_Array_Object (Error_Msg_Node_1))
2380 Set_Msg_Str ("type of ");
2381 Set_Msg_Node (Related_Array_Object (Error_Msg_Node_1));
2382 Set_Msg_Str (" declared");
2383 Set_Msg_Insertion_Line_Number
2384 (Sloc (Related_Array_Object (Error_Msg_Node_1)), Flag);
2388 -- If we fall through, it is not a special case, so first output
2389 -- the name of the type, preceded by private for a private type
2391 if Is_Private_Type (Error_Msg_Node_1) then
2392 Set_Msg_Str ("private type ");
2394 Set_Msg_Str ("type ");
2397 Ent := Error_Msg_Node_1;
2399 if Is_Internal_Name (Chars (Ent)) then
2400 Unwind_Internal_Type (Ent);
2403 -- Types in Standard are displayed as "Standard.name"
2405 if Sloc (Ent) <= Standard_Location then
2407 Set_Msg_Str ("Standard.");
2412 -- Types in other language defined units are displayed as
2413 -- "package-name.type-name"
2416 Is_Predefined_File_Name (Unit_File_Name (Get_Source_Unit (Ent)))
2418 Get_Unqualified_Decoded_Name_String
2419 (Unit_Name (Get_Source_Unit (Ent)));
2420 Name_Len := Name_Len - 2;
2422 Set_Casing (Mixed_Case);
2423 Set_Msg_Name_Buffer;
2425 Set_Casing (Mixed_Case);
2430 -- All other types display as "type name" defined at line xxx
2431 -- possibly qualified if qualification is requested.
2435 Set_Qualification (Error_Msg_Qual_Level, Ent);
2439 -- If Ent is an anonymous subprogram type, there is no name to print,
2440 -- so remove enclosing quotes.
2442 if Buffer_Ends_With ("""") then
2443 Buffer_Remove ("""");
2449 -- If the original type did not come from a predefined file, add the
2450 -- location where the type was defined.
2452 if Sloc (Error_Msg_Node_1) > Standard_Location
2454 not Is_Predefined_File_Name
2455 (Unit_File_Name (Get_Source_Unit (Error_Msg_Node_1)))
2457 Set_Msg_Str (" defined");
2458 Set_Msg_Insertion_Line_Number (Sloc (Error_Msg_Node_1), Flag);
2460 -- If it did come from a predefined file, deal with the case where
2461 -- this was a file with a generic instantiation from elsewhere.
2464 if Sloc (Error_Msg_Node_1) > Standard_Location then
2466 Iloc : constant Source_Ptr :=
2467 Instantiation_Location (Sloc (Error_Msg_Node_1));
2470 if Iloc /= No_Location
2471 and then not Suppress_Instance_Location
2473 Set_Msg_Str (" from instance");
2474 Set_Msg_Insertion_Line_Number (Iloc, Flag);
2479 end Set_Msg_Insertion_Type_Reference;
2481 ---------------------------------
2482 -- Set_Msg_Insertion_Unit_Name --
2483 ---------------------------------
2485 procedure Set_Msg_Insertion_Unit_Name (Suffix : Boolean := True) is
2487 if Error_Msg_Unit_1 = No_Unit_Name then
2490 elsif Error_Msg_Unit_1 = Error_Unit_Name then
2492 Set_Msg_Str ("<error>");
2495 Get_Unit_Name_String (Error_Msg_Unit_1, Suffix);
2498 Set_Msg_Name_Buffer;
2502 -- The following assignment ensures that a second percent insertion
2503 -- character will correspond to the Error_Msg_Unit_2 parameter. We
2504 -- suppress possible validity checks in case operating in -gnatVa mode,
2505 -- and Error_Msg_Unit_2 is not needed and has not been set.
2508 pragma Suppress (Range_Check);
2510 Error_Msg_Unit_1 := Error_Msg_Unit_2;
2512 end Set_Msg_Insertion_Unit_Name;
2518 procedure Set_Msg_Node (Node : Node_Id) is
2523 case Nkind (Node) is
2524 when N_Designator =>
2525 Set_Msg_Node (Name (Node));
2527 Set_Msg_Node (Identifier (Node));
2530 when N_Defining_Program_Unit_Name =>
2531 Set_Msg_Node (Name (Node));
2533 Set_Msg_Node (Defining_Identifier (Node));
2536 when N_Selected_Component | N_Expanded_Name =>
2537 Set_Msg_Node (Prefix (Node));
2539 Set_Msg_Node (Selector_Name (Node));
2546 -- The only remaining possibilities are identifiers, defining
2547 -- identifiers, pragmas, and pragma argument associations.
2549 if Nkind (Node) = N_Pragma then
2550 Nam := Pragma_Name (Node);
2552 -- The other cases have Chars fields, and we want to test for possible
2553 -- internal names, which generally represent something gone wrong. An
2554 -- exception is the case of internal type names, where we try to find a
2555 -- reasonable external representation for the external name
2557 elsif Is_Internal_Name (Chars (Node))
2559 ((Is_Entity_Name (Node)
2560 and then Present (Entity (Node))
2561 and then Is_Type (Entity (Node)))
2563 (Nkind (Node) = N_Defining_Identifier and then Is_Type (Node)))
2565 if Nkind (Node) = N_Identifier then
2566 Ent := Entity (Node);
2571 -- If the type is the designated type of an access_to_subprogram,
2572 -- there is no name to provide in the call.
2574 if Ekind (Ent) = E_Subprogram_Type then
2577 Unwind_Internal_Type (Ent);
2581 -- If not internal name, just use name in Chars field
2584 Nam := Chars (Node);
2587 -- At this stage, the name to output is in Nam
2589 Get_Unqualified_Decoded_Name_String (Nam);
2591 -- Remove trailing upper case letters from the name (useful for
2592 -- dealing with some cases of internal names.
2594 while Name_Len > 1 and then Name_Buffer (Name_Len) in 'A' .. 'Z' loop
2595 Name_Len := Name_Len - 1;
2598 -- If we have any of the names from standard that start with the
2599 -- characters "any " (e.g. Any_Type), then kill the message since
2600 -- almost certainly it is a junk cascaded message.
2603 and then Name_Buffer (1 .. 4) = "any "
2605 Kill_Message := True;
2608 -- Now we have to set the proper case. If we have a source location
2609 -- then do a check to see if the name in the source is the same name
2610 -- as the name in the Names table, except for possible differences
2611 -- in case, which is the case when we can copy from the source.
2614 Src_Loc : constant Source_Ptr := Sloc (Node);
2615 Sbuffer : Source_Buffer_Ptr;
2617 Src_Ptr : Source_Ptr;
2623 -- For standard locations, always use mixed case
2625 if Src_Loc <= No_Location
2626 or else Sloc (Node) <= No_Location
2628 Set_Casing (Mixed_Case);
2631 -- Determine if the reference we are dealing with corresponds to
2632 -- text at the point of the error reference. This will often be
2633 -- the case for simple identifier references, and is the case
2634 -- where we can copy the spelling from the source.
2636 Sbuffer := Source_Text (Get_Source_File_Index (Src_Loc));
2638 while Ref_Ptr <= Name_Len loop
2640 Fold_Lower (Sbuffer (Src_Ptr)) /=
2641 Fold_Lower (Name_Buffer (Ref_Ptr));
2642 Ref_Ptr := Ref_Ptr + 1;
2643 Src_Ptr := Src_Ptr + 1;
2646 -- If we get through the loop without a mismatch, then output the
2647 -- name the way it is spelled in the source program
2649 if Ref_Ptr > Name_Len then
2652 for J in 1 .. Name_Len loop
2653 Name_Buffer (J) := Sbuffer (Src_Ptr);
2654 Src_Ptr := Src_Ptr + 1;
2657 -- Otherwise set the casing using the default identifier casing
2660 Set_Casing (Identifier_Casing (Flag_Source), Mixed_Case);
2665 Set_Msg_Name_Buffer;
2673 procedure Set_Msg_Text (Text : String; Flag : Source_Ptr) is
2674 C : Character; -- Current character
2675 P : Natural; -- Current index;
2677 procedure Set_Msg_Insertion_Warning;
2678 -- Deal with ? ?? ?x? ?X? insertion sequences
2680 -------------------------------
2681 -- Set_Msg_Insertion_Warning --
2682 -------------------------------
2684 procedure Set_Msg_Insertion_Warning is
2686 Warning_Msg_Char := ' ';
2688 if P <= Text'Last and then Text (P) = '?' then
2689 if Warning_Doc_Switch then
2690 Warning_Msg_Char := '?';
2695 elsif P + 1 <= Text'Last
2696 and then (Text (P) in 'a' .. 'z'
2698 Text (P) in 'A' .. 'Z')
2699 and then Text (P + 1) = '?'
2701 if Warning_Doc_Switch then
2702 Warning_Msg_Char := Text (P);
2707 end Set_Msg_Insertion_Warning;
2709 -- Start of processing for Set_Msg_Text
2712 Manual_Quote_Mode := False;
2714 Flag_Source := Get_Source_File_Index (Flag);
2717 while P <= Text'Last loop
2721 -- Check for insertion character or sequence
2725 if P <= Text'Last and then Text (P) = '%' then
2727 Set_Msg_Insertion_Name_Literal;
2729 Set_Msg_Insertion_Name;
2733 if P <= Text'Last and then Text (P) = '$' then
2735 Set_Msg_Insertion_Unit_Name (Suffix => False);
2737 Set_Msg_Insertion_Unit_Name;
2741 Set_Msg_Insertion_File_Name;
2744 Set_Msg_Insertion_Type_Reference (Flag);
2747 Set_Msg_Insertion_Reserved_Name;
2750 Set_Msg_Insertion_Node;
2753 Set_Msg_Insertion_Line_Number (Error_Msg_Sloc, Flag);
2756 Continuation := True;
2758 if Text (P) = '\' then
2759 Continuation_New_Line := True;
2764 Set_Msg_Insertion_Column;
2767 Set_Msg_Insertion_Run_Time_Name;
2770 Set_Msg_Insertion_Uint;
2773 Manual_Quote_Mode := not Manual_Quote_Mode;
2777 null; -- already dealt with
2780 Set_Msg_Insertion_Warning;
2784 -- If tagging of messages is enabled, and this is a warning,
2785 -- then it is treated as being [enabled by default].
2787 if Error_Msg_Warn and Warning_Doc_Switch then
2788 Warning_Msg_Char := '?';
2792 null; -- already dealt with
2795 Set_Msg_Char (Text (P));
2799 Set_Msg_Str (Error_Msg_String (1 .. Error_Msg_Strlen));
2801 -- Upper case letter
2805 -- Start of reserved word if two or more
2807 if P <= Text'Last and then Text (P) in 'A' .. 'Z' then
2809 Set_Msg_Insertion_Reserved_Word (Text, P);
2811 -- Single upper case letter is just inserted
2817 -- Normal character with no special treatment
2831 procedure Set_Posted (N : Node_Id) is
2835 if Is_Serious_Error then
2837 -- We always set Error_Posted on the node itself
2839 Set_Error_Posted (N);
2841 -- If it is a subexpression, then set Error_Posted on parents up to
2842 -- and including the first non-subexpression construct. This helps
2843 -- avoid cascaded error messages within a single expression.
2849 Set_Error_Posted (P);
2850 exit when Nkind (P) not in N_Subexpr;
2853 -- A special check, if we just posted an error on an attribute
2854 -- definition clause, then also set the entity involved as posted.
2855 -- For example, this stops complaining about the alignment after
2856 -- complaining about the size, which is likely to be useless.
2858 if Nkind (P) = N_Attribute_Definition_Clause then
2859 if Is_Entity_Name (Name (P)) then
2860 Set_Error_Posted (Entity (Name (P)));
2866 -----------------------
2867 -- Set_Qualification --
2868 -----------------------
2870 procedure Set_Qualification (N : Nat; E : Entity_Id) is
2872 if N /= 0 and then Scope (E) /= Standard_Standard then
2873 Set_Qualification (N - 1, Scope (E));
2874 Set_Msg_Node (Scope (E));
2877 end Set_Qualification;
2879 ------------------------
2880 -- Special_Msg_Delete --
2881 ------------------------
2883 -- Is it really right to have all this specialized knowledge in errout?
2885 function Special_Msg_Delete
2887 N : Node_Or_Entity_Id;
2888 E : Node_Or_Entity_Id) return Boolean
2891 -- Never delete messages in -gnatdO mode
2893 if Debug_Flag_OO then
2896 -- Processing for "atomic access cannot be guaranteed"
2898 elsif Msg = "atomic access to & cannot be guaranteed" then
2900 -- When an atomic object refers to a non-atomic type in the same
2901 -- scope, we implicitly make the type atomic. In the non-error case
2902 -- this is surely safe (and in fact prevents an error from occurring
2903 -- if the type is not atomic by default). But if the object cannot be
2904 -- made atomic, then we introduce an extra junk message by this
2905 -- manipulation, which we get rid of here.
2907 -- We identify this case by the fact that it references a type for
2908 -- which Is_Atomic is set, but there is no Atomic pragma setting it.
2911 and then Is_Atomic (E)
2912 and then No (Get_Rep_Pragma (E, Name_Atomic))
2917 -- Processing for "Size too small" messages
2919 elsif Msg = "size for& too small, minimum allowed is ^" then
2921 -- Suppress "size too small" errors in CodePeer mode and SPARK mode,
2922 -- since pragma Pack is also ignored in these configurations.
2924 if CodePeer_Mode or SPARK_Mode then
2927 -- When a size is wrong for a frozen type there is no explicit size
2928 -- clause, and other errors have occurred, suppress the message,
2929 -- since it is likely that this size error is a cascaded result of
2930 -- other errors. The reason we eliminate unfrozen types is that
2931 -- messages issued before the freeze type are for sure OK.
2934 and then Serious_Errors_Detected > 0
2935 and then Nkind (N) /= N_Component_Clause
2936 and then Nkind (Parent (N)) /= N_Component_Clause
2938 No (Get_Attribute_Definition_Clause (E, Attribute_Size))
2940 No (Get_Attribute_Definition_Clause (E, Attribute_Object_Size))
2942 No (Get_Attribute_Definition_Clause (E, Attribute_Value_Size))
2948 -- All special tests complete, so go ahead with message
2951 end Special_Msg_Delete;
2953 --------------------------
2954 -- Unwind_Internal_Type --
2955 --------------------------
2957 procedure Unwind_Internal_Type (Ent : in out Entity_Id) is
2958 Derived : Boolean := False;
2960 Old_Ent : Entity_Id;
2963 -- Undo placement of a quote, since we will put it back later
2965 Mchar := Msg_Buffer (Msglen);
2968 Msglen := Msglen - 1;
2971 -- The loop here deals with recursive types, we are trying to find a
2972 -- related entity that is not an implicit type. Note that the check with
2973 -- Old_Ent stops us from getting "stuck". Also, we don't output the
2974 -- "type derived from" message more than once in the case where we climb
2975 -- up multiple levels.
2980 -- Implicit access type, use directly designated type In Ada 2005,
2981 -- the designated type may be an anonymous access to subprogram, in
2982 -- which case we can only point to its definition.
2984 if Is_Access_Type (Ent) then
2985 if Ekind (Ent) = E_Access_Subprogram_Type
2986 or else Ekind (Ent) = E_Anonymous_Access_Subprogram_Type
2987 or else Is_Access_Protected_Subprogram_Type (Ent)
2989 Ent := Directly_Designated_Type (Ent);
2991 if not Comes_From_Source (Ent) then
2992 if Buffer_Ends_With ("type ") then
2993 Buffer_Remove ("type ");
2996 if Is_Itype (Ent) then
2998 Assoc : constant Node_Id :=
2999 Associated_Node_For_Itype (Ent);
3002 if Nkind (Assoc) in N_Subprogram_Specification then
3004 -- Anonymous access to subprogram in a signature.
3005 -- Indicate the enclosing subprogram.
3009 (Associated_Node_For_Itype (Ent));
3011 ("access to subprogram declared in profile of ");
3014 Set_Msg_Str ("access to subprogram with profile ");
3019 elsif Ekind (Ent) = E_Function then
3020 Set_Msg_Str ("access to function ");
3022 Set_Msg_Str ("access to procedure ");
3027 -- Type is access to object, named or anonymous
3030 Set_Msg_Str ("access to ");
3031 Ent := Directly_Designated_Type (Ent);
3036 elsif Is_Class_Wide_Type (Ent) then
3038 Ent := Root_Type (Ent);
3040 -- Use base type if this is a subtype
3042 elsif Ent /= Base_Type (Ent) then
3043 Buffer_Remove ("type ");
3045 -- Avoid duplication "subtype of subtype of", and also replace
3046 -- "derived from subtype of" simply by "derived from"
3048 if not Buffer_Ends_With ("subtype of ")
3049 and then not Buffer_Ends_With ("derived from ")
3051 Set_Msg_Str ("subtype of ");
3054 Ent := Base_Type (Ent);
3056 -- If this is a base type with a first named subtype, use the first
3057 -- named subtype instead. This is not quite accurate in all cases,
3058 -- but it makes too much noise to be accurate and add 'Base in all
3059 -- cases. Note that we only do this is the first named subtype is not
3060 -- itself an internal name. This avoids the obvious loop (subtype ->
3061 -- basetype -> subtype) which would otherwise occur!)
3065 FST : constant Entity_Id := First_Subtype (Ent);
3068 if not Is_Internal_Name (Chars (FST)) then
3072 -- Otherwise use root type
3076 Buffer_Remove ("type ");
3078 -- Test for "subtype of type derived from" which seems
3079 -- excessive and is replaced by "type derived from".
3081 Buffer_Remove ("subtype of");
3083 -- Avoid duplicated "type derived from type derived from"
3085 if not Buffer_Ends_With ("type derived from ") then
3086 Set_Msg_Str ("type derived from ");
3097 -- If we are stuck in a loop, get out and settle for the internal
3098 -- name after all. In this case we set to kill the message if it is
3099 -- not the first error message (we really try hard not to show the
3100 -- dirty laundry of the implementation to the poor user!)
3102 if Ent = Old_Ent then
3103 Kill_Message := True;
3107 -- Get out if we finally found a non-internal name to use
3109 exit Find when not Is_Internal_Name (Chars (Ent));
3115 end Unwind_Internal_Type;
3121 procedure VMS_Convert is
3131 P := Msg_Buffer'First;
3137 if Msg_Buffer (P) = '-' then
3138 for G in Gnames'Range loop
3139 L := Gnames (G)'Length;
3141 -- See if we have "-ggg switch", where ggg is Gnames entry
3143 if P + L + 7 <= Msglen
3144 and then Msg_Buffer (P + 1 .. P + L) = Gnames (G).all
3145 and then Msg_Buffer (P + L + 1 .. P + L + 7) = " switch"
3147 -- Replace by "/vvv qualifier", where vvv is Vnames entry
3149 N := Vnames (G)'Length;
3150 Msg_Buffer (P + N + 11 .. Msglen + N - L + 3) :=
3151 Msg_Buffer (P + L + 8 .. Msglen);
3152 Msg_Buffer (P) := '/';
3153 Msg_Buffer (P + 1 .. P + N) := Vnames (G).all;
3154 Msg_Buffer (P + N + 1 .. P + N + 10) := " qualifier";
3156 Msglen := Msglen + N - L + 3;