1 ------------------------------------------------------------------------------
3 -- GNAT COMPILER COMPONENTS --
9 -- Copyright (C) 1992-2015, 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;
42 with Nlists; use Nlists;
43 with Output; use Output;
44 with Scans; use Scans;
45 with Sem_Aux; use Sem_Aux;
46 with Sinput; use Sinput;
47 with Sinfo; use Sinfo;
48 with Snames; use Snames;
49 with Stand; use Stand;
50 with Stylesw; use Stylesw;
51 with Uname; use Uname;
53 package body Errout is
55 Errors_Must_Be_Ignored : Boolean := False;
56 -- Set to True by procedure Set_Ignore_Errors (True), when calls to error
57 -- message procedures should be ignored (when parsing irrelevant text in
58 -- sources being preprocessed).
60 Finalize_Called : Boolean := False;
61 -- Set True if the Finalize routine has been called
63 Warn_On_Instance : Boolean;
64 -- Flag set true for warning message to be posted on instance
66 ------------------------------------
67 -- Table of Non-Instance Messages --
68 ------------------------------------
70 -- This table contains an entry for every error message processed by the
71 -- Error_Msg routine that is not posted on generic (or inlined) instance.
72 -- As explained in further detail in the Error_Msg procedure body, this
73 -- table is used to avoid posting redundant messages on instances.
75 type NIM_Record is record
79 -- Type used to store text and location of one message
81 package Non_Instance_Msgs is new Table.Table (
82 Table_Component_Type => NIM_Record,
83 Table_Index_Type => Int,
86 Table_Increment => 100,
87 Table_Name => "Non_Instance_Msgs");
89 -----------------------
90 -- Local Subprograms --
91 -----------------------
93 procedure Error_Msg_Internal
98 -- This is the low level routine used to post messages after dealing with
99 -- the issue of messages placed on instantiations (which get broken up
100 -- into separate calls in Error_Msg). Sptr is the location on which the
101 -- flag will be placed in the output. In the case where the flag is on
102 -- the template, this points directly to the template, not to one of the
103 -- instantiation copies of the template. Optr is the original location
104 -- used to flag the error, and this may indeed point to an instantiation
105 -- copy. So typically we can see Optr pointing to the template location
106 -- in an instantiation copy when Sptr points to the source location of
107 -- the actual instantiation (i.e the line with the new). Msg_Cont is
108 -- set true if this is a continuation message.
110 function No_Warnings (N : Node_Or_Entity_Id) return Boolean;
111 -- Determines if warnings should be suppressed for the given node
113 function OK_Node (N : Node_Id) return Boolean;
114 -- Determines if a node is an OK node to place an error message on (return
115 -- True) or if the error message should be suppressed (return False). A
116 -- message is suppressed if the node already has an error posted on it,
117 -- or if it refers to an Etype that has an error posted on it, or if
118 -- it references an Entity that has an error posted on it.
120 procedure Output_Source_Line
121 (L : Physical_Line_Number;
122 Sfile : Source_File_Index;
124 -- Outputs text of source line L, in file S, together with preceding line
125 -- number, as described above for Output_Line_Number. The Errs parameter
126 -- indicates if there are errors attached to the line, which forces
127 -- listing on, even in the presence of pragma List (Off).
129 procedure Set_Msg_Insertion_Column;
130 -- Handle column number insertion (@ insertion character)
132 procedure Set_Msg_Insertion_Node;
133 -- Handle node (name from node) insertion (& insertion character)
135 procedure Set_Msg_Insertion_Type_Reference (Flag : Source_Ptr);
136 -- Handle type reference (right brace insertion character). Flag is the
137 -- location of the flag, which is provided for the internal call to
138 -- Set_Msg_Insertion_Line_Number,
140 procedure Set_Msg_Insertion_Unit_Name (Suffix : Boolean := True);
141 -- Handle unit name insertion ($ insertion character). Depending on Boolean
142 -- parameter Suffix, (spec) or (body) is appended after the unit name.
144 procedure Set_Msg_Node (Node : Node_Id);
145 -- Add the sequence of characters for the name associated with the given
146 -- node to the current message. For N_Designator, N_Selected_Component,
147 -- N_Defining_Program_Unit_Name, and N_Expanded_Name, the Prefix is
150 procedure Set_Msg_Text (Text : String; Flag : Source_Ptr);
151 -- Add a sequence of characters to the current message. The characters may
152 -- be one of the special insertion characters (see documentation in spec).
153 -- Flag is the location at which the error is to be posted, which is used
154 -- to determine whether or not the # insertion needs a file name. The
155 -- variables Msg_Buffer are set on return Msglen.
157 procedure Set_Posted (N : Node_Id);
158 -- Sets the Error_Posted flag on the given node, and all its parents that
159 -- are subexpressions and then on the parent non-subexpression construct
160 -- that contains the original expression. If that parent is a named
161 -- association, the flag is further propagated to its parent. This is done
162 -- in order to guard against cascaded errors. Note that this call has an
163 -- effect for a serious error only.
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 function Warn_Insertion return String;
193 -- This is called for warning messages only (so Warning_Msg_Char is set)
194 -- and returns a corresponding string to use at the beginning of generated
195 -- auxiliary messages, such as "in instantiation at ...".
196 -- 'a' .. 'z' returns "?x?"
197 -- 'A' .. 'Z' returns "?X?"
199 -- '$' returns "?$?info: "
201 -- No other settings are valid
203 -----------------------
204 -- Change_Error_Text --
205 -----------------------
207 procedure Change_Error_Text (Error_Id : Error_Msg_Id; New_Msg : String) is
208 Save_Next : Error_Msg_Id;
209 Err_Id : Error_Msg_Id := Error_Id;
212 Set_Msg_Text (New_Msg, Errors.Table (Error_Id).Sptr);
213 Errors.Table (Error_Id).Text := new String'(Msg_Buffer (1 .. Msglen));
215 -- If in immediate error message mode, output modified error message now
216 -- This is just a bit tricky, because we want to output just a single
217 -- message, and the messages we modified is already linked in. We solve
218 -- this by temporarily resetting its forward pointer to empty.
220 if Debug_Flag_OO then
221 Save_Next := Errors.Table (Error_Id).Next;
222 Errors.Table (Error_Id).Next := No_Error_Msg;
225 (Errors.Table (Error_Id).Line, Errors.Table (Error_Id).Sfile, True);
226 Output_Error_Msgs (Err_Id);
227 Errors.Table (Error_Id).Next := Save_Next;
229 end Change_Error_Text;
231 ------------------------
232 -- Compilation_Errors --
233 ------------------------
235 function Compilation_Errors return Boolean is
237 if not Finalize_Called then
240 return Erroutc.Compilation_Errors;
242 end Compilation_Errors;
244 --------------------------------------
245 -- Delete_Warning_And_Continuations --
246 --------------------------------------
248 procedure Delete_Warning_And_Continuations (Msg : Error_Msg_Id) is
252 pragma Assert (not Errors.Table (Msg).Msg_Cont);
257 M : Error_Msg_Object renames Errors.Table (Id);
260 if not M.Deleted then
262 Warnings_Detected := Warnings_Detected - 1;
265 Info_Messages := Info_Messages - 1;
269 Warnings_Treated_As_Errors := Warnings_Treated_As_Errors - 1;
274 exit when Id = No_Error_Msg;
275 exit when not Errors.Table (Id).Msg_Cont;
278 end Delete_Warning_And_Continuations;
284 -- Error_Msg posts a flag at the given location, except that if the
285 -- Flag_Location points within a generic template and corresponds to an
286 -- instantiation of this generic template, then the actual message will be
287 -- posted on the generic instantiation, along with additional messages
288 -- referencing the generic declaration.
290 procedure Error_Msg (Msg : String; Flag_Location : Source_Ptr) is
291 Sindex : Source_File_Index;
292 -- Source index for flag location
294 Orig_Loc : Source_Ptr;
295 -- Original location of Flag_Location (i.e. location in original
296 -- template in instantiation case, otherwise unchanged).
299 -- It is a fatal error to issue an error message when scanning from the
300 -- internal source buffer (see Sinput for further documentation)
302 pragma Assert (Sinput.Source /= Internal_Source_Ptr);
304 -- Return if all errors are to be ignored
306 if Errors_Must_Be_Ignored then
310 -- If we already have messages, and we are trying to place a message at
311 -- No_Location, then just ignore the attempt since we assume that what
312 -- is happening is some cascaded junk. Note that this is safe in the
313 -- sense that proceeding will surely bomb. We will also bomb if the flag
314 -- location is No_Location and we don't have any messages so far, but
315 -- that is a real bug and a legitimate bomb, so we go ahead.
317 if Flag_Location = No_Location
318 and then Total_Errors_Detected > 0
323 -- Start of processing for new message
325 Sindex := Get_Source_File_Index (Flag_Location);
326 Prescan_Message (Msg);
327 Orig_Loc := Original_Location (Flag_Location);
329 -- If the current location is in an instantiation, the issue arises of
330 -- whether to post the message on the template or the instantiation.
332 -- The way we decide is to see if we have posted the same message on
333 -- the template when we compiled the template (the template is always
334 -- compiled before any instantiations). For this purpose, we use a
335 -- separate table of messages. The reason we do this is twofold:
337 -- First, the messages can get changed by various processing
338 -- including the insertion of tokens etc, making it hard to
339 -- do the comparison.
341 -- Second, we will suppress a warning on a template if it is not in
342 -- the current extended source unit. That's reasonable and means we
343 -- don't want the warning on the instantiation here either, but it
344 -- does mean that the main error table would not in any case include
347 if Flag_Location = Orig_Loc then
348 Non_Instance_Msgs.Append ((new String'(Msg), Flag_Location));
349 Warn_On_Instance := False;
351 -- Here we have an instance message
354 -- Delete if debug flag off, and this message duplicates a message
355 -- already posted on the corresponding template
357 if not Debug_Flag_GG then
358 for J in Non_Instance_Msgs.First .. Non_Instance_Msgs.Last loop
359 if Msg = Non_Instance_Msgs.Table (J).Msg.all
360 and then Non_Instance_Msgs.Table (J).Loc = Orig_Loc
367 -- No duplicate, so error/warning will be posted on instance
369 Warn_On_Instance := Is_Warning_Msg;
372 -- Ignore warning message that is suppressed for this location. Note
373 -- that style checks are not considered warning messages for this
376 if Is_Warning_Msg and then Warnings_Suppressed (Orig_Loc) /= No_String
380 -- For style messages, check too many messages so far
383 and then Maximum_Messages /= 0
384 and then Warnings_Detected >= Maximum_Messages
389 -- The idea at this stage is that we have two kinds of messages
391 -- First, we have those messages that are to be placed as requested at
392 -- Flag_Location. This includes messages that have nothing to do with
393 -- generics, and also messages placed on generic templates that reflect
394 -- an error in the template itself. For such messages we simply call
395 -- Error_Msg_Internal to place the message in the requested location.
397 if Instantiation (Sindex) = No_Location then
398 Error_Msg_Internal (Msg, Flag_Location, Flag_Location, False);
402 -- If we are trying to flag an error in an instantiation, we may have
403 -- a generic contract violation. What we generate in this case is:
405 -- instantiation error at ...
406 -- original error message
410 -- warning: in instantiation at
411 -- warning: original warning message
413 -- All these messages are posted at the location of the top level
414 -- instantiation. If there are nested instantiations, then the
415 -- instantiation error message can be repeated, pointing to each
416 -- of the relevant instantiations.
418 -- Note: the instantiation mechanism is also shared for inlining of
419 -- subprogram bodies when front end inlining is done. In this case the
420 -- messages have the form:
422 -- in inlined body at ...
423 -- original error message
427 -- warning: in inlined body at
428 -- warning: original warning message
430 -- OK, here we have an instantiation error, and we need to generate the
431 -- error on the instantiation, rather than on the template.
434 Actual_Error_Loc : Source_Ptr;
435 -- Location of outer level instantiation in instantiation case, or
436 -- just a copy of Flag_Location in the normal case. This is the
437 -- location where all error messages will actually be posted.
439 Save_Error_Msg_Sloc : constant Source_Ptr := Error_Msg_Sloc;
440 -- Save possible location set for caller's message. We need to use
441 -- Error_Msg_Sloc for the location of the instantiation error but we
442 -- have to preserve a possible original value.
444 X : Source_File_Index;
446 Msg_Cont_Status : Boolean;
447 -- Used to label continuation lines in instantiation case with
448 -- proper Msg_Cont status.
451 -- Loop to find highest level instantiation, where all error
452 -- messages will be placed.
456 Actual_Error_Loc := Instantiation (X);
457 X := Get_Source_File_Index (Actual_Error_Loc);
458 exit when Instantiation (X) = No_Location;
461 -- Since we are generating the messages at the instantiation point in
462 -- any case, we do not want the references to the bad lines in the
463 -- instance to be annotated with the location of the instantiation.
465 Suppress_Instance_Location := True;
466 Msg_Cont_Status := False;
468 -- Loop to generate instantiation messages
470 Error_Msg_Sloc := Flag_Location;
471 X := Get_Source_File_Index (Flag_Location);
472 while Instantiation (X) /= No_Location loop
474 -- Suppress instantiation message on continuation lines
476 if Msg (Msg'First) /= '\' then
478 -- Case of inlined body
480 if Inlined_Body (X) then
481 if Is_Warning_Msg or Is_Style_Msg then
483 (Warn_Insertion & "in inlined body #",
484 Actual_Error_Loc, Flag_Location, Msg_Cont_Status);
487 ("error in inlined body #",
488 Actual_Error_Loc, Flag_Location, Msg_Cont_Status);
491 -- Case of generic instantiation
494 if Is_Warning_Msg or else Is_Style_Msg then
496 (Warn_Insertion & "in instantiation #",
497 Actual_Error_Loc, Flag_Location, Msg_Cont_Status);
500 ("instantiation error #",
501 Actual_Error_Loc, Flag_Location, Msg_Cont_Status);
506 Error_Msg_Sloc := Instantiation (X);
507 X := Get_Source_File_Index (Error_Msg_Sloc);
508 Msg_Cont_Status := True;
511 Suppress_Instance_Location := False;
512 Error_Msg_Sloc := Save_Error_Msg_Sloc;
514 -- Here we output the original message on the outer instantiation
517 (Msg, Actual_Error_Loc, Flag_Location, Msg_Cont_Status);
521 --------------------------------
522 -- Error_Msg_Ada_2012_Feature --
523 --------------------------------
525 procedure Error_Msg_Ada_2012_Feature (Feature : String; Loc : Source_Ptr) is
527 if Ada_Version < Ada_2012 then
528 Error_Msg (Feature & " is an Ada 2012 feature", Loc);
530 if No (Ada_Version_Pragma) then
531 Error_Msg ("\unit must be compiled with -gnat2012 switch", Loc);
533 Error_Msg_Sloc := Sloc (Ada_Version_Pragma);
534 Error_Msg ("\incompatible with Ada version set#", Loc);
537 end Error_Msg_Ada_2012_Feature;
543 procedure Error_Msg_AP (Msg : String) is
548 -- If we had saved the Scan_Ptr value after scanning the previous
549 -- token, then we would have exactly the right place for putting
550 -- the flag immediately at hand. However, that would add at least
551 -- two instructions to a Scan call *just* to service the possibility
552 -- of an Error_Msg_AP call. So instead we reconstruct that value.
554 -- We have two possibilities, start with Prev_Token_Ptr and skip over
555 -- the current token, which is made harder by the possibility that this
556 -- token may be in error, or start with Token_Ptr and work backwards.
557 -- We used to take the second approach, but it's hard because of
558 -- comments, and harder still because things that look like comments
559 -- can appear inside strings. So now we take the first approach.
561 -- Note: in the case where there is no previous token, Prev_Token_Ptr
562 -- is set to Source_First, which is a reasonable position for the
563 -- error flag in this situation.
565 S1 := Prev_Token_Ptr;
568 -- If the previous token is a string literal, we need a special approach
569 -- since there may be white space inside the literal and we don't want
570 -- to stop on that white space.
572 -- Note: since this is an error recovery issue anyway, it is not worth
573 -- worrying about special UTF_32 line terminator characters here.
575 if Prev_Token = Tok_String_Literal then
579 if Source (S1) = C then
581 exit when Source (S1) /= C;
582 elsif Source (S1) in Line_Terminator then
587 -- Character literal also needs special handling
589 elsif Prev_Token = Tok_Char_Literal then
592 -- Otherwise we search forward for the end of the current token, marked
593 -- by a line terminator, white space, a comment symbol or if we bump
594 -- into the following token (i.e. the current token).
596 -- Again, it is not worth worrying about UTF_32 special line terminator
597 -- characters in this context, since this is only for error recovery.
600 while Source (S1) not in Line_Terminator
601 and then Source (S1) /= ' '
602 and then Source (S1) /= ASCII.HT
603 and then (Source (S1) /= '-' or else Source (S1 + 1) /= '-')
604 and then S1 /= Token_Ptr
610 -- S1 is now set to the location for the flag
619 procedure Error_Msg_BC (Msg : String) is
621 -- If we are at end of file, post the flag after the previous token
623 if Token = Tok_EOF then
626 -- If we are at start of file, post the flag at the current token
628 elsif Token_Ptr = Source_First (Current_Source_File) then
631 -- If the character before the current token is a space or a horizontal
632 -- tab, then we place the flag on this character (in the case of a tab
633 -- we would really like to place it in the "last" character of the tab
634 -- space, but that it too much trouble to worry about).
636 elsif Source (Token_Ptr - 1) = ' '
637 or else Source (Token_Ptr - 1) = ASCII.HT
639 Error_Msg (Msg, Token_Ptr - 1);
641 -- If there is no space or tab before the current token, then there is
642 -- no room to place the flag before the token, so we place it on the
643 -- token instead (this happens for example at the start of a line).
646 Error_Msg (Msg, Token_Ptr);
654 procedure Error_Msg_CRT (Feature : String; N : Node_Id) is
655 CNRT : constant String := " not allowed in no run time mode";
656 CCRT : constant String := " not supported by configuration>";
658 S : String (1 .. Feature'Length + 1 + CCRT'Length);
663 S (2 .. Feature'Length + 1) := Feature;
664 L := Feature'Length + 2;
666 if No_Run_Time_Mode then
667 S (L .. L + CNRT'Length - 1) := CNRT;
668 L := L + CNRT'Length - 1;
670 else pragma Assert (Configurable_Run_Time_Mode);
671 S (L .. L + CCRT'Length - 1) := CCRT;
672 L := L + CCRT'Length - 1;
675 Error_Msg_N (S (1 .. L), N);
676 Configurable_Run_Time_Violations := Configurable_Run_Time_Violations + 1;
683 procedure Error_Msg_PT (E : Entity_Id; Iface_Prim : Entity_Id) is
686 ("illegal overriding of subprogram inherited from interface", E);
688 Error_Msg_Sloc := Sloc (Iface_Prim);
690 ("\first formal of & declared # must be of mode `OUT`, `IN OUT` " &
691 "or access-to-variable", E);
698 procedure Error_Msg_F (Msg : String; N : Node_Id) is
700 Error_Msg_NEL (Msg, N, N, Sloc (First_Node (N)));
707 procedure Error_Msg_FE
710 E : Node_Or_Entity_Id)
713 Error_Msg_NEL (Msg, N, E, Sloc (First_Node (N)));
716 ------------------------
717 -- Error_Msg_Internal --
718 ------------------------
720 procedure Error_Msg_Internal
726 Next_Msg : Error_Msg_Id;
727 -- Pointer to next message at insertion point
729 Prev_Msg : Error_Msg_Id;
730 -- Pointer to previous message at insertion point
732 Temp_Msg : Error_Msg_Id;
735 -- Set if warning to be treated as error
737 procedure Handle_Serious_Error;
738 -- Internal procedure to do all error message handling for a serious
739 -- error message, other than bumping the error counts and arranging
740 -- for the message to be output.
742 --------------------------
743 -- Handle_Serious_Error --
744 --------------------------
746 procedure Handle_Serious_Error is
748 -- Turn off code generation if not done already
750 if Operating_Mode = Generate_Code then
751 Operating_Mode := Check_Semantics;
752 Expander_Active := False;
755 -- Set the fatal error flag in the unit table unless we are in
756 -- Try_Semantics mode (in which case we set ignored mode if not
757 -- currently set. This stops the semantics from being performed
758 -- if we find a serious error. This is skipped if we are currently
759 -- dealing with the configuration pragma file.
761 if Current_Source_Unit /= No_Unit then
763 U : constant Unit_Number_Type := Get_Source_Unit (Sptr);
765 if Try_Semantics then
766 if Fatal_Error (U) = None then
767 Set_Fatal_Error (U, Error_Ignored);
770 Set_Fatal_Error (U, Error_Detected);
774 end Handle_Serious_Error;
776 -- Start of processing for Error_Msg_Internal
779 if Raise_Exception_On_Error /= 0 then
780 raise Error_Msg_Exception;
783 Continuation := Msg_Cont;
784 Continuation_New_Line := False;
785 Suppress_Message := False;
786 Kill_Message := False;
787 Set_Msg_Text (Msg, Sptr);
789 -- Kill continuation if parent message killed
791 if Continuation and Last_Killed then
795 -- Return without doing anything if message is suppressed
798 and then not All_Errors_Mode
799 and then not Is_Warning_Msg
800 and then not Is_Unconditional_Msg
802 if not Continuation then
809 -- Return without doing anything if message is killed and this is not
810 -- the first error message. The philosophy is that if we get a weird
811 -- error message and we already have had a message, then we hope the
812 -- weird message is a junk cascaded message
815 and then not All_Errors_Mode
816 and then Total_Errors_Detected /= 0
818 if not Continuation then
825 -- Special check for warning message to see if it should be output
827 if Is_Warning_Msg then
829 -- Immediate return if warning message and warnings are suppressed
831 if Warnings_Suppressed (Optr) /= No_String
833 Warnings_Suppressed (Sptr) /= No_String
835 Cur_Msg := No_Error_Msg;
839 -- If the flag location is in the main extended source unit then for
840 -- sure we want the warning since it definitely belongs
842 if In_Extended_Main_Source_Unit (Sptr) then
845 -- If the main unit has not been read yet. the warning must be on
846 -- a configuration file: gnat.adc or user-defined. This means we
847 -- are not parsing the main unit yet, so skip following checks.
849 elsif No (Cunit (Main_Unit)) then
852 -- If the flag location is not in the main extended source unit, then
853 -- we want to eliminate the warning, unless it is in the extended
854 -- main code unit and we want warnings on the instance.
856 elsif In_Extended_Main_Code_Unit (Sptr) and then Warn_On_Instance then
859 -- Keep warning if debug flag G set
861 elsif Debug_Flag_GG then
864 -- Keep warning if message text contains !!
866 elsif Has_Double_Exclam then
869 -- Here is where we delete a warning from a with'ed unit
872 Cur_Msg := No_Error_Msg;
874 if not Continuation then
882 -- If message is to be ignored in special ignore message mode, this is
883 -- where we do this special processing, bypassing message output.
885 if Ignore_Errors_Enable > 0 then
886 if Is_Serious_Error then
887 Handle_Serious_Error;
893 -- If error message line length set, and this is a continuation message
894 -- then all we do is to append the text to the text of the last message
895 -- with a comma space separator (eliminating a possible (style) or
898 if Error_Msg_Line_Length /= 0 and then Continuation then
899 Cur_Msg := Errors.Last;
902 Oldm : String_Ptr := Errors.Table (Cur_Msg).Text;
903 Newm : String (1 .. Oldm'Last + 2 + Msglen);
908 -- First copy old message to new one and free it
910 Newm (Oldm'Range) := Oldm.all;
914 -- Remove (style) or info: at start of message
916 if Msglen > 8 and then Msg_Buffer (1 .. 8) = "(style) " then
919 elsif Msglen > 6 and then Msg_Buffer (1 .. 6) = "info: " then
926 -- Now deal with separation between messages. Normally this is
927 -- simply comma space, but there are some special cases.
929 -- If continuation new line, then put actual NL character in msg
931 if Continuation_New_Line then
933 Newm (Newl) := ASCII.LF;
935 -- If continuation message is enclosed in parentheses, then
936 -- special treatment (don't need a comma, and we want to combine
937 -- successive parenthetical remarks into a single one with
938 -- separating commas).
940 elsif Msg_Buffer (M) = '(' and then Msg_Buffer (Msglen) = ')' then
942 -- Case where existing message ends in right paren, remove
943 -- and separate parenthetical remarks with a comma.
945 if Newm (Newl) = ')' then
947 Msg_Buffer (M) := ' ';
949 -- Case where we are adding new parenthetical comment
956 -- Case where continuation not in parens and no new line
959 Newm (Newl + 1 .. Newl + 2) := ", ";
963 -- Append new message
965 Newm (Newl + 1 .. Newl + Msglen - M + 1) :=
966 Msg_Buffer (M .. Msglen);
967 Newl := Newl + Msglen - M + 1;
968 Errors.Table (Cur_Msg).Text := new String'(Newm (1 .. Newl));
970 -- Update warning msg flag and message doc char if needed
972 if Is_Warning_Msg then
973 if not Errors.Table (Cur_Msg).Warn then
974 Errors.Table (Cur_Msg).Warn := True;
975 Errors.Table (Cur_Msg).Warn_Chr := Warning_Msg_Char;
977 elsif Warning_Msg_Char /= ' ' then
978 Errors.Table (Cur_Msg).Warn_Chr := Warning_Msg_Char;
986 -- Here we build a new error object
989 ((Text => new String'(Msg_Buffer (1 .. Msglen)),
990 Next => No_Error_Msg,
991 Prev => No_Error_Msg,
994 Sfile => Get_Source_File_Index (Sptr),
995 Line => Get_Physical_Line_Number (Sptr),
996 Col => Get_Column_Number (Sptr),
997 Warn => Is_Warning_Msg,
999 Check => Is_Check_Msg,
1000 Warn_Err => False, -- reset below
1001 Warn_Chr => Warning_Msg_Char,
1002 Style => Is_Style_Msg,
1003 Serious => Is_Serious_Error,
1004 Uncond => Is_Unconditional_Msg,
1005 Msg_Cont => Continuation,
1007 Cur_Msg := Errors.Last;
1009 -- Test if warning to be treated as error
1013 and then (Warning_Treated_As_Error (Msg_Buffer (1 .. Msglen))
1015 Warning_Treated_As_Error (Get_Warning_Tag (Cur_Msg)));
1017 -- Propagate Warn_Err to this message and preceding continuations
1019 for J in reverse 1 .. Errors.Last loop
1020 Errors.Table (J).Warn_Err := Warn_Err;
1021 exit when not Errors.Table (J).Msg_Cont;
1024 -- If immediate errors mode set, output error message now. Also output
1025 -- now if the -d1 debug flag is set (so node number message comes out
1026 -- just before actual error message)
1028 if Debug_Flag_OO or else Debug_Flag_1 then
1031 (Errors.Table (Cur_Msg).Line, Errors.Table (Cur_Msg).Sfile, True);
1032 Temp_Msg := Cur_Msg;
1033 Output_Error_Msgs (Temp_Msg);
1035 -- If not in immediate errors mode, then we insert the message in the
1036 -- error chain for later output by Finalize. The messages are sorted
1037 -- first by unit (main unit comes first), and within a unit by source
1038 -- location (earlier flag location first in the chain).
1041 -- First a quick check, does this belong at the very end of the chain
1042 -- of error messages. This saves a lot of time in the normal case if
1043 -- there are lots of messages.
1045 if Last_Error_Msg /= No_Error_Msg
1046 and then Errors.Table (Cur_Msg).Sfile =
1047 Errors.Table (Last_Error_Msg).Sfile
1048 and then (Sptr > Errors.Table (Last_Error_Msg).Sptr
1050 (Sptr = Errors.Table (Last_Error_Msg).Sptr
1052 Optr > Errors.Table (Last_Error_Msg).Optr))
1054 Prev_Msg := Last_Error_Msg;
1055 Next_Msg := No_Error_Msg;
1057 -- Otherwise do a full sequential search for the insertion point
1060 Prev_Msg := No_Error_Msg;
1061 Next_Msg := First_Error_Msg;
1062 while Next_Msg /= No_Error_Msg loop
1064 Errors.Table (Cur_Msg).Sfile < Errors.Table (Next_Msg).Sfile;
1066 if Errors.Table (Cur_Msg).Sfile = Errors.Table (Next_Msg).Sfile
1068 exit when Sptr < Errors.Table (Next_Msg).Sptr
1069 or else (Sptr = Errors.Table (Next_Msg).Sptr
1070 and then Optr < Errors.Table (Next_Msg).Optr);
1073 Prev_Msg := Next_Msg;
1074 Next_Msg := Errors.Table (Next_Msg).Next;
1078 -- Now we insert the new message in the error chain. The insertion
1079 -- point for the message is after Prev_Msg and before Next_Msg.
1081 -- The possible insertion point for the new message is after Prev_Msg
1082 -- and before Next_Msg. However, this is where we do a special check
1083 -- for redundant parsing messages, defined as messages posted on the
1084 -- same line. The idea here is that probably such messages are junk
1085 -- from the parser recovering. In full errors mode, we don't do this
1086 -- deletion, but otherwise such messages are discarded at this stage.
1088 if Prev_Msg /= No_Error_Msg
1089 and then Errors.Table (Prev_Msg).Line =
1090 Errors.Table (Cur_Msg).Line
1091 and then Errors.Table (Prev_Msg).Sfile =
1092 Errors.Table (Cur_Msg).Sfile
1093 and then Compiler_State = Parsing
1094 and then not All_Errors_Mode
1096 -- Don't delete unconditional messages and at this stage, don't
1097 -- delete continuation lines (we attempted to delete those earlier
1098 -- if the parent message was deleted.
1100 if not Errors.Table (Cur_Msg).Uncond
1101 and then not Continuation
1103 -- Don't delete if prev msg is warning and new msg is an error.
1104 -- This is because we don't want a real error masked by a
1105 -- warning. In all other cases (that is parse errors for the
1106 -- same line that are not unconditional) we do delete the
1107 -- message. This helps to avoid junk extra messages from
1108 -- cascaded parsing errors
1110 if not (Errors.Table (Prev_Msg).Warn
1112 Errors.Table (Prev_Msg).Style)
1114 (Errors.Table (Cur_Msg).Warn
1116 Errors.Table (Cur_Msg).Style)
1118 -- All tests passed, delete the message by simply returning
1119 -- without any further processing.
1121 if not Continuation then
1122 Last_Killed := True;
1130 -- Come here if message is to be inserted in the error chain
1132 if not Continuation then
1133 Last_Killed := False;
1136 if Prev_Msg = No_Error_Msg then
1137 First_Error_Msg := Cur_Msg;
1139 Errors.Table (Prev_Msg).Next := Cur_Msg;
1142 Errors.Table (Cur_Msg).Next := Next_Msg;
1144 if Next_Msg = No_Error_Msg then
1145 Last_Error_Msg := Cur_Msg;
1149 -- Bump appropriate statistics count
1151 if Errors.Table (Cur_Msg).Warn or else Errors.Table (Cur_Msg).Style then
1152 Warnings_Detected := Warnings_Detected + 1;
1154 if Errors.Table (Cur_Msg).Info then
1155 Info_Messages := Info_Messages + 1;
1158 elsif Errors.Table (Cur_Msg).Check then
1159 Check_Messages := Check_Messages + 1;
1162 Total_Errors_Detected := Total_Errors_Detected + 1;
1164 if Errors.Table (Cur_Msg).Serious then
1165 Serious_Errors_Detected := Serious_Errors_Detected + 1;
1166 Handle_Serious_Error;
1170 -- Record warning message issued
1172 if Errors.Table (Cur_Msg).Warn
1173 and then not Errors.Table (Cur_Msg).Msg_Cont
1175 Warning_Msg := Cur_Msg;
1178 -- If too many warnings turn off warnings
1180 if Maximum_Messages /= 0 then
1181 if Warnings_Detected = Maximum_Messages then
1182 Warning_Mode := Suppress;
1185 -- If too many errors abandon compilation
1187 if Total_Errors_Detected = Maximum_Messages then
1188 raise Unrecoverable_Error;
1191 end Error_Msg_Internal;
1197 procedure Error_Msg_N (Msg : String; N : Node_Or_Entity_Id) is
1199 Error_Msg_NEL (Msg, N, N, Sloc (N));
1206 procedure Error_Msg_NE
1208 N : Node_Or_Entity_Id;
1209 E : Node_Or_Entity_Id)
1212 Error_Msg_NEL (Msg, N, E, Sloc (N));
1219 procedure Error_Msg_NEL
1221 N : Node_Or_Entity_Id;
1222 E : Node_Or_Entity_Id;
1223 Flag_Location : Source_Ptr)
1226 if Special_Msg_Delete (Msg, N, E) then
1230 Prescan_Message (Msg);
1232 -- Special handling for warning messages
1234 if Is_Warning_Msg then
1236 -- Suppress if no warnings set for either entity or node
1238 if No_Warnings (N) or else No_Warnings (E) then
1240 -- Disable any continuation messages as well
1242 Last_Killed := True;
1246 -- Suppress if inside loop that is known to be null or is probably
1247 -- null (case where loop executes only if invalid values present).
1248 -- In either case warnings in the loop are likely to be junk.
1255 while Present (P) loop
1256 if Nkind (P) = N_Loop_Statement
1257 and then Suppress_Loop_Warnings (P)
1267 -- Test for message to be output
1270 or else Is_Unconditional_Msg
1271 or else Is_Warning_Msg
1273 or else (Msg (Msg'First) = '\' and then not Last_Killed)
1276 Error_Msg_Node_1 := E;
1277 Error_Msg (Msg, Flag_Location);
1280 Last_Killed := True;
1283 if not (Is_Warning_Msg or Is_Style_Msg) then
1292 procedure Error_Msg_NW
1295 N : Node_Or_Entity_Id)
1299 and then In_Extended_Main_Source_Unit (N)
1300 and then Comes_From_Source (N)
1302 Error_Msg_NEL (Msg, N, N, Sloc (N));
1310 procedure Error_Msg_S (Msg : String) is
1312 Error_Msg (Msg, Scan_Ptr);
1319 procedure Error_Msg_SC (Msg : String) is
1321 -- If we are at end of file, post the flag after the previous token
1323 if Token = Tok_EOF then
1326 -- For all other cases the message is posted at the current token
1330 Error_Msg (Msg, Token_Ptr);
1338 procedure Error_Msg_SP (Msg : String) is
1340 -- Note: in the case where there is no previous token, Prev_Token_Ptr
1341 -- is set to Source_First, which is a reasonable position for the
1342 -- error flag in this situation
1344 Error_Msg (Msg, Prev_Token_Ptr);
1351 procedure Finalize (Last_Call : Boolean) is
1356 procedure Delete_Warning (E : Error_Msg_Id);
1357 -- Delete a warning msg if not already deleted and adjust warning count
1359 --------------------
1360 -- Delete_Warning --
1361 --------------------
1363 procedure Delete_Warning (E : Error_Msg_Id) is
1365 if not Errors.Table (E).Deleted then
1366 Errors.Table (E).Deleted := True;
1367 Warnings_Detected := Warnings_Detected - 1;
1369 if Errors.Table (E).Info then
1370 Info_Messages := Info_Messages - 1;
1373 if Errors.Table (E).Warn_Err then
1374 Warnings_Treated_As_Errors := Warnings_Treated_As_Errors - 1;
1379 -- Start of processing for Finalize
1382 -- Set Prev pointers
1384 Cur := First_Error_Msg;
1385 while Cur /= No_Error_Msg loop
1386 Nxt := Errors.Table (Cur).Next;
1387 exit when Nxt = No_Error_Msg;
1388 Errors.Table (Nxt).Prev := Cur;
1392 -- Eliminate any duplicated error messages from the list. This is
1393 -- done after the fact to avoid problems with Change_Error_Text.
1395 Cur := First_Error_Msg;
1396 while Cur /= No_Error_Msg loop
1397 Nxt := Errors.Table (Cur).Next;
1400 while F /= No_Error_Msg
1401 and then Errors.Table (F).Sptr = Errors.Table (Cur).Sptr
1403 Check_Duplicate_Message (Cur, F);
1404 F := Errors.Table (F).Next;
1410 -- Mark any messages suppressed by specific warnings as Deleted
1412 Cur := First_Error_Msg;
1413 while Cur /= No_Error_Msg loop
1415 CE : Error_Msg_Object renames Errors.Table (Cur);
1416 Tag : constant String := Get_Warning_Tag (Cur);
1419 if (CE.Warn and not CE.Deleted)
1421 (Warning_Specifically_Suppressed (CE.Sptr, CE.Text, Tag) /=
1424 Warning_Specifically_Suppressed (CE.Optr, CE.Text, Tag) /=
1427 Delete_Warning (Cur);
1429 -- If this is a continuation, delete previous parts of message
1432 while Errors.Table (F).Msg_Cont loop
1433 F := Errors.Table (F).Prev;
1434 exit when F = No_Error_Msg;
1438 -- Delete any following continuations
1442 F := Errors.Table (F).Next;
1443 exit when F = No_Error_Msg;
1444 exit when not Errors.Table (F).Msg_Cont;
1450 Cur := Errors.Table (Cur).Next;
1453 Finalize_Called := True;
1455 -- Check consistency of specific warnings (may add warnings). We only
1456 -- do this on the last call, after all possible warnings are posted.
1459 Validate_Specific_Warnings (Error_Msg'Access);
1467 function First_Node (C : Node_Id) return Node_Id is
1468 Orig : constant Node_Id := Original_Node (C);
1469 Loc : constant Source_Ptr := Sloc (Orig);
1470 Sfile : constant Source_File_Index := Get_Source_File_Index (Loc);
1474 function Test_Earlier (N : Node_Id) return Traverse_Result;
1475 -- Function applied to every node in the construct
1477 procedure Search_Tree_First is new Traverse_Proc (Test_Earlier);
1478 -- Create traversal procedure
1484 function Test_Earlier (N : Node_Id) return Traverse_Result is
1485 Norig : constant Node_Id := Original_Node (N);
1486 Loc : constant Source_Ptr := Sloc (Norig);
1489 -- Check for earlier
1493 -- Ignore nodes with no useful location information
1495 and then Loc /= Standard_Location
1496 and then Loc /= No_Location
1498 -- Ignore nodes from a different file. This ensures against cases
1499 -- of strange foreign code somehow being present. We don't want
1500 -- wild placement of messages if that happens.
1502 and then Get_Source_File_Index (Loc) = Sfile
1511 -- Start of processing for First_Node
1514 if Nkind (Orig) in N_Subexpr then
1517 Search_Tree_First (Orig);
1529 function First_Sloc (N : Node_Id) return Source_Ptr is
1530 SI : constant Source_File_Index := Source_Index (Get_Source_Unit (N));
1531 SF : constant Source_Ptr := Source_First (SI);
1536 F := First_Node (N);
1539 -- The following circuit is a bit subtle. When we have parenthesized
1540 -- expressions, then the Sloc will not record the location of the paren,
1541 -- but we would like to post the flag on the paren. So what we do is to
1542 -- crawl up the tree from the First_Node, adjusting the Sloc value for
1543 -- any parentheses we know are present. Yes, we know this circuit is not
1544 -- 100% reliable (e.g. because we don't record all possible paren level
1545 -- values), but this is only for an error message so it is good enough.
1548 Paren_Loop : for J in 1 .. Paren_Count (F) loop
1550 -- We don't look more than 12 characters behind the current
1551 -- location, and in any case not past the front of the source.
1553 Search_Loop : for K in 1 .. 12 loop
1554 exit Search_Loop when S = SF;
1556 if Source_Text (SI) (S - 1) = '(' then
1560 elsif Source_Text (SI) (S - 1) <= ' ' then
1566 end loop Search_Loop;
1567 end loop Paren_Loop;
1569 exit Node_Loop when F = N;
1571 exit Node_Loop when Nkind (F) not in N_Subexpr;
1577 -----------------------
1578 -- Get_Ignore_Errors --
1579 -----------------------
1581 function Get_Ignore_Errors return Boolean is
1583 return Errors_Must_Be_Ignored;
1584 end Get_Ignore_Errors;
1590 procedure Initialize is
1593 First_Error_Msg := No_Error_Msg;
1594 Last_Error_Msg := No_Error_Msg;
1595 Serious_Errors_Detected := 0;
1596 Total_Errors_Detected := 0;
1597 Warnings_Treated_As_Errors := 0;
1598 Warnings_Detected := 0;
1600 Warnings_As_Errors_Count := 0;
1601 Cur_Msg := No_Error_Msg;
1604 -- Initialize warnings tables
1607 Specific_Warnings.Init;
1614 function No_Warnings (N : Node_Or_Entity_Id) return Boolean is
1616 if Error_Posted (N) then
1619 elsif Nkind (N) in N_Entity and then Has_Warnings_Off (N) then
1622 elsif Is_Entity_Name (N)
1623 and then Present (Entity (N))
1624 and then Has_Warnings_Off (Entity (N))
1637 function OK_Node (N : Node_Id) return Boolean is
1638 K : constant Node_Kind := Nkind (N);
1641 if Error_Posted (N) then
1644 elsif K in N_Has_Etype
1645 and then Present (Etype (N))
1646 and then Error_Posted (Etype (N))
1651 or else K = N_Attribute_Reference
1652 or else K = N_Character_Literal
1653 or else K = N_Expanded_Name
1654 or else K = N_Identifier
1655 or else K = N_Operator_Symbol)
1656 and then Present (Entity (N))
1657 and then Error_Posted (Entity (N))
1665 ---------------------
1666 -- Output_Messages --
1667 ---------------------
1669 procedure Output_Messages is
1673 procedure Write_Error_Summary;
1674 -- Write error summary
1676 procedure Write_Header (Sfile : Source_File_Index);
1677 -- Write header line (compiling or checking given file)
1679 procedure Write_Max_Errors;
1680 -- Write message if max errors reached
1682 -------------------------
1683 -- Write_Error_Summary --
1684 -------------------------
1686 procedure Write_Error_Summary is
1688 -- Extra blank line if error messages or source listing were output
1690 if Total_Errors_Detected + Warnings_Detected > 0 or else Full_List
1695 -- Message giving number of lines read and number of errors detected.
1696 -- This normally goes to Standard_Output. The exception is when brief
1697 -- mode is not set, verbose mode (or full list mode) is set, and
1698 -- there are errors. In this case we send the message to standard
1699 -- error to make sure that *something* appears on standard error
1700 -- in an error situation.
1702 if Total_Errors_Detected + Warnings_Detected /= 0
1703 and then not Brief_Output
1704 and then (Verbose_Mode or Full_List)
1709 -- Message giving total number of lines. Don't give this message if
1710 -- the Main_Source line is unknown (this happens in error situations,
1711 -- e.g. when integrated preprocessing fails).
1713 if Main_Source_File /= No_Source_File then
1715 Write_Int (Num_Source_Lines (Main_Source_File));
1717 if Num_Source_Lines (Main_Source_File) = 1 then
1718 Write_Str (" line: ");
1720 Write_Str (" lines: ");
1724 if Total_Errors_Detected = 0 then
1725 Write_Str ("No errors");
1727 elsif Total_Errors_Detected = 1 then
1728 Write_Str ("1 error");
1731 Write_Int (Total_Errors_Detected);
1732 Write_Str (" errors");
1735 if Warnings_Detected - Info_Messages /= 0 then
1737 Write_Int (Warnings_Detected);
1738 Write_Str (" warning");
1740 if Warnings_Detected - Info_Messages /= 1 then
1744 if Warning_Mode = Treat_As_Error then
1745 Write_Str (" (treated as error");
1747 if Warnings_Detected /= 1 then
1753 elsif Warnings_Treated_As_Errors /= 0 then
1755 Write_Int (Warnings_Treated_As_Errors);
1756 Write_Str (" treated as errors)");
1760 if Info_Messages /= 0 then
1762 Write_Int (Info_Messages);
1763 Write_Str (" info message");
1765 if Info_Messages > 1 then
1771 Set_Standard_Output;
1772 end Write_Error_Summary;
1778 procedure Write_Header (Sfile : Source_File_Index) is
1780 if Verbose_Mode or Full_List then
1781 if Original_Operating_Mode = Generate_Code then
1782 Write_Str ("Compiling: ");
1784 Write_Str ("Checking: ");
1787 Write_Name (Full_File_Name (Sfile));
1789 if not Debug_Flag_7 then
1791 Write_Str ("Source file time stamp: ");
1792 Write_Time_Stamp (Sfile);
1794 Write_Str ("Compiled at: " & Compilation_Time);
1801 ----------------------
1802 -- Write_Max_Errors --
1803 ----------------------
1805 procedure Write_Max_Errors is
1807 if Maximum_Messages /= 0 then
1808 if Warnings_Detected >= Maximum_Messages then
1810 Write_Line ("maximum number of warnings output");
1811 Write_Line ("any further warnings suppressed");
1812 Set_Standard_Output;
1815 -- If too many errors print message
1817 if Total_Errors_Detected >= Maximum_Messages then
1819 Write_Line ("fatal error: maximum number of errors detected");
1820 Set_Standard_Output;
1823 end Write_Max_Errors;
1825 -- Start of processing for Output_Messages
1828 -- Error if Finalize has not been called
1830 if not Finalize_Called then
1831 raise Program_Error;
1834 -- Reset current error source file if the main unit has a pragma
1835 -- Source_Reference. This ensures outputting the proper name of
1836 -- the source file in this situation.
1838 if Main_Source_File = No_Source_File
1839 or else Num_SRef_Pragmas (Main_Source_File) /= 0
1841 Current_Error_Source_File := No_Source_File;
1846 if Brief_Output or (not Full_List and not Verbose_Mode) then
1849 E := First_Error_Msg;
1850 while E /= No_Error_Msg loop
1851 if not Errors.Table (E).Deleted and then not Debug_Flag_KK then
1852 if Full_Path_Name_For_Brief_Errors then
1853 Write_Name (Full_Ref_Name (Errors.Table (E).Sfile));
1855 Write_Name (Reference_Name (Errors.Table (E).Sfile));
1859 Write_Int (Int (Physical_To_Logical
1860 (Errors.Table (E).Line,
1861 Errors.Table (E).Sfile)));
1864 if Errors.Table (E).Col < 10 then
1868 Write_Int (Int (Errors.Table (E).Col));
1870 Output_Msg_Text (E);
1874 E := Errors.Table (E).Next;
1877 Set_Standard_Output;
1880 -- Full source listing case
1883 List_Pragmas_Index := 1;
1884 List_Pragmas_Mode := True;
1885 E := First_Error_Msg;
1887 -- Normal case, to stdout (copyright notice already output)
1889 if Full_List_File_Name = null then
1890 if not Debug_Flag_7 then
1897 Create_List_File_Access.all (Full_List_File_Name.all);
1898 Set_Special_Output (Write_List_Info_Access.all'Access);
1900 -- Write copyright notice to file
1902 if not Debug_Flag_7 then
1903 Write_Str ("GNAT ");
1904 Write_Str (Gnat_Version_String);
1906 Write_Str ("Copyright 1992-" &
1908 ", Free Software Foundation, Inc.");
1913 -- First list extended main source file units with errors
1915 for U in Main_Unit .. Last_Unit loop
1916 if In_Extended_Main_Source_Unit (Cunit_Entity (U))
1918 -- If debug flag d.m is set, only the main source is listed
1920 and then (U = Main_Unit or else not Debug_Flag_Dot_M)
1922 -- If the unit of the entity does not come from source, it is
1923 -- an implicit subprogram declaration for a child subprogram.
1924 -- Do not emit errors for it, they are listed with the body.
1927 (No (Cunit_Entity (U))
1928 or else Comes_From_Source (Cunit_Entity (U))
1929 or else not Is_Subprogram (Cunit_Entity (U)))
1931 -- If the compilation unit associated with this unit does not
1932 -- come from source, it means it is an instantiation that should
1933 -- not be included in the source listing.
1935 and then Comes_From_Source (Cunit (U))
1938 Sfile : constant Source_File_Index := Source_Index (U);
1943 -- Only write the header if Sfile is known
1945 if Sfile /= No_Source_File then
1946 Write_Header (Sfile);
1950 -- Normally, we don't want an "error messages from file"
1951 -- message when listing the entire file, so we set the
1952 -- current source file as the current error source file.
1953 -- However, the old style of doing things was to list this
1954 -- message if pragma Source_Reference is present, even for
1955 -- the main unit. Since the purpose of the -gnatd.m switch
1956 -- is to duplicate the old behavior, we skip the reset if
1957 -- this debug flag is set.
1959 if not Debug_Flag_Dot_M then
1960 Current_Error_Source_File := Sfile;
1963 -- Only output the listing if Sfile is known, to avoid
1964 -- crashing the compiler.
1966 if Sfile /= No_Source_File then
1967 for N in 1 .. Last_Source_Line (Sfile) loop
1968 while E /= No_Error_Msg
1969 and then Errors.Table (E).Deleted
1971 E := Errors.Table (E).Next;
1976 and then Errors.Table (E).Line = N
1977 and then Errors.Table (E).Sfile = Sfile;
1979 Output_Source_Line (N, Sfile, Err_Flag);
1982 Output_Error_Msgs (E);
1984 if not Debug_Flag_2 then
1994 -- Then output errors, if any, for subsidiary units not in the
1995 -- main extended unit.
1997 -- Note: if debug flag d.m set, include errors for any units other
1998 -- than the main unit in the extended source unit (e.g. spec and
1999 -- subunits for a body).
2001 while E /= No_Error_Msg
2002 and then (not In_Extended_Main_Source_Unit (Errors.Table (E).Sptr)
2005 and then Get_Source_Unit
2006 (Errors.Table (E).Sptr) /= Main_Unit))
2008 if Errors.Table (E).Deleted then
2009 E := Errors.Table (E).Next;
2014 (Errors.Table (E).Line, Errors.Table (E).Sfile, True);
2015 Output_Error_Msgs (E);
2019 -- If output to file, write extra copy of error summary to the
2020 -- output file, and then close it.
2022 if Full_List_File_Name /= null then
2023 Write_Error_Summary;
2025 Close_List_File_Access.all;
2026 Cancel_Special_Output;
2030 -- Verbose mode (error lines only with error flags). Normally this is
2031 -- ignored in full list mode, unless we are listing to a file, in which
2032 -- case we still generate -gnatv output to standard output.
2035 and then (not Full_List or else Full_List_File_Name /= null)
2039 -- Output the header only when Main_Source_File is known
2041 if Main_Source_File /= No_Source_File then
2042 Write_Header (Main_Source_File);
2045 E := First_Error_Msg;
2047 -- Loop through error lines
2049 while E /= No_Error_Msg loop
2050 if Errors.Table (E).Deleted then
2051 E := Errors.Table (E).Next;
2055 (Errors.Table (E).Line, Errors.Table (E).Sfile, True);
2056 Output_Error_Msgs (E);
2061 -- Output error summary if verbose or full list mode
2063 if Verbose_Mode or else Full_List then
2064 Write_Error_Summary;
2069 if Warning_Mode = Treat_As_Error then
2070 Total_Errors_Detected :=
2071 Total_Errors_Detected + Warnings_Detected - Info_Messages;
2072 Warnings_Detected := Info_Messages;
2074 end Output_Messages;
2076 ------------------------
2077 -- Output_Source_Line --
2078 ------------------------
2080 procedure Output_Source_Line
2081 (L : Physical_Line_Number;
2082 Sfile : Source_File_Index;
2088 Line_Number_Output : Boolean := False;
2089 -- Set True once line number is output
2091 Empty_Line : Boolean := True;
2092 -- Set False if line includes at least one character
2095 if Sfile /= Current_Error_Source_File then
2096 Write_Str ("==============Error messages for ");
2098 case Sinput.File_Type (Sfile) is
2100 Write_Str ("source");
2102 when Sinput.Config =>
2103 Write_Str ("configuration pragmas");
2106 Write_Str ("symbol definition");
2108 when Sinput.Preproc =>
2109 Write_Str ("preprocessing data");
2112 Write_Str (" file: ");
2113 Write_Name (Full_File_Name (Sfile));
2116 if Num_SRef_Pragmas (Sfile) > 0 then
2117 Write_Str ("--------------Line numbers from file: ");
2118 Write_Name (Full_Ref_Name (Sfile));
2119 Write_Str (" (starting at line ");
2120 Write_Int (Int (First_Mapped_Line (Sfile)));
2125 Current_Error_Source_File := Sfile;
2128 if Errs or List_Pragmas_Mode then
2129 Output_Line_Number (Physical_To_Logical (L, Sfile));
2130 Line_Number_Output := True;
2133 S := Line_Start (L, Sfile);
2136 C := Source_Text (Sfile) (S);
2137 exit when C = ASCII.LF or else C = ASCII.CR or else C = EOF;
2139 -- Deal with matching entry in List_Pragmas table
2142 and then List_Pragmas_Index <= List_Pragmas.Last
2143 and then S = List_Pragmas.Table (List_Pragmas_Index).Ploc
2145 case List_Pragmas.Table (List_Pragmas_Index).Ptyp is
2149 -- Ignore if on line with errors so that error flags
2150 -- get properly listed with the error line .
2153 Write_Char (ASCII.FF);
2157 List_Pragmas_Mode := True;
2159 if not Line_Number_Output then
2160 Output_Line_Number (Physical_To_Logical (L, Sfile));
2161 Line_Number_Output := True;
2168 List_Pragmas_Mode := False;
2171 List_Pragmas_Index := List_Pragmas_Index + 1;
2173 -- Normal case (no matching entry in List_Pragmas table)
2176 if Errs or List_Pragmas_Mode then
2181 Empty_Line := False;
2185 -- If we have output a source line, then add the line terminator, with
2186 -- training spaces preserved (so we output the line exactly as input).
2188 if Line_Number_Output then
2192 Write_Eol_Keep_Blanks;
2195 end Output_Source_Line;
2197 -----------------------------
2198 -- Remove_Warning_Messages --
2199 -----------------------------
2201 procedure Remove_Warning_Messages (N : Node_Id) is
2203 function Check_For_Warning (N : Node_Id) return Traverse_Result;
2204 -- This function checks one node for a possible warning message
2206 function Check_All_Warnings is new Traverse_Func (Check_For_Warning);
2207 -- This defines the traversal operation
2209 -----------------------
2210 -- Check_For_Warning --
2211 -----------------------
2213 function Check_For_Warning (N : Node_Id) return Traverse_Result is
2214 Loc : constant Source_Ptr := Sloc (N);
2217 function To_Be_Removed (E : Error_Msg_Id) return Boolean;
2218 -- Returns True for a message that is to be removed. Also adjusts
2219 -- warning count appropriately.
2225 function To_Be_Removed (E : Error_Msg_Id) return Boolean is
2227 if E /= No_Error_Msg
2229 -- Don't remove if location does not match
2231 and then Errors.Table (E).Optr = Loc
2233 -- Don't remove if not warning/info message. Note that we do
2234 -- not remove style messages here. They are warning messages
2235 -- but not ones we want removed in this context.
2237 and then Errors.Table (E).Warn
2239 -- Don't remove unconditional messages
2241 and then not Errors.Table (E).Uncond
2243 Warnings_Detected := Warnings_Detected - 1;
2245 if Errors.Table (E).Info then
2246 Info_Messages := Info_Messages - 1;
2251 -- No removal required
2258 -- Start of processing for Check_For_Warnings
2261 while To_Be_Removed (First_Error_Msg) loop
2262 First_Error_Msg := Errors.Table (First_Error_Msg).Next;
2265 if First_Error_Msg = No_Error_Msg then
2266 Last_Error_Msg := No_Error_Msg;
2269 E := First_Error_Msg;
2270 while E /= No_Error_Msg loop
2271 while To_Be_Removed (Errors.Table (E).Next) loop
2272 Errors.Table (E).Next :=
2273 Errors.Table (Errors.Table (E).Next).Next;
2275 if Errors.Table (E).Next = No_Error_Msg then
2276 Last_Error_Msg := E;
2280 E := Errors.Table (E).Next;
2283 if Nkind (N) = N_Raise_Constraint_Error
2284 and then Original_Node (N) /= N
2285 and then No (Condition (N))
2287 -- Warnings may have been posted on subexpressions of the original
2288 -- tree. We place the original node back on the tree to remove
2289 -- those warnings, whose sloc do not match those of any node in
2290 -- the current tree. Given that we are in unreachable code, this
2291 -- modification to the tree is harmless.
2294 Status : Traverse_Final_Result;
2297 if Is_List_Member (N) then
2298 Set_Condition (N, Original_Node (N));
2299 Status := Check_All_Warnings (Condition (N));
2301 Rewrite (N, Original_Node (N));
2302 Status := Check_All_Warnings (N);
2311 end Check_For_Warning;
2313 -- Start of processing for Remove_Warning_Messages
2316 if Warnings_Detected /= 0 then
2318 Discard : Traverse_Final_Result;
2319 pragma Warnings (Off, Discard);
2322 Discard := Check_All_Warnings (N);
2325 end Remove_Warning_Messages;
2327 procedure Remove_Warning_Messages (L : List_Id) is
2330 if Is_Non_Empty_List (L) then
2332 while Present (Stat) loop
2333 Remove_Warning_Messages (Stat);
2337 end Remove_Warning_Messages;
2339 ----------------------
2340 -- Adjust_Name_Case --
2341 ----------------------
2343 procedure Adjust_Name_Case (Loc : Source_Ptr) is
2345 -- We have an all lower case name from Namet, and now we want to set
2346 -- the appropriate case. If possible we copy the actual casing from
2347 -- the source. If not we use standard identifier casing.
2350 Src_Ind : constant Source_File_Index := Get_Source_File_Index (Loc);
2351 Sbuffer : Source_Buffer_Ptr;
2353 Src_Ptr : Source_Ptr;
2359 -- For standard locations, always use mixed case
2361 if Loc <= No_Location then
2362 Set_Casing (Mixed_Case);
2365 -- Determine if the reference we are dealing with corresponds to
2366 -- text at the point of the error reference. This will often be
2367 -- the case for simple identifier references, and is the case
2368 -- where we can copy the casing from the source.
2370 Sbuffer := Source_Text (Src_Ind);
2372 while Ref_Ptr <= Name_Len loop
2374 Fold_Lower (Sbuffer (Src_Ptr)) /=
2375 Fold_Lower (Name_Buffer (Ref_Ptr));
2376 Ref_Ptr := Ref_Ptr + 1;
2377 Src_Ptr := Src_Ptr + 1;
2380 -- If we get through the loop without a mismatch, then output the
2381 -- name the way it is cased in the source program
2383 if Ref_Ptr > Name_Len then
2386 for J in 1 .. Name_Len loop
2387 Name_Buffer (J) := Sbuffer (Src_Ptr);
2388 Src_Ptr := Src_Ptr + 1;
2391 -- Otherwise set the casing using the default identifier casing
2394 Set_Casing (Identifier_Casing (Src_Ind), Mixed_Case);
2398 end Adjust_Name_Case;
2400 ---------------------------
2401 -- Set_Identifier_Casing --
2402 ---------------------------
2404 procedure Set_Identifier_Casing
2405 (Identifier_Name : System.Address;
2406 File_Name : System.Address)
2408 Ident : constant Big_String_Ptr := To_Big_String_Ptr (Identifier_Name);
2409 File : constant Big_String_Ptr := To_Big_String_Ptr (File_Name);
2412 Desired_Case : Casing_Type := Mixed_Case;
2413 -- Casing required for result. Default value of Mixed_Case is used if
2414 -- for some reason we cannot find the right file name in the table.
2417 -- Get length of file name
2420 while File (Flen + 1) /= ASCII.NUL loop
2424 -- Loop through file names to find matching one. This is a bit slow, but
2425 -- we only do it in error situations so it is not so terrible. Note that
2426 -- if the loop does not exit, then the desired case will be left set to
2427 -- Mixed_Case, this can happen if the name was not in canonical form.
2429 for J in 1 .. Last_Source_File loop
2430 Get_Name_String (Full_Debug_Name (J));
2433 and then Name_Buffer (1 .. Name_Len) = String (File (1 .. Flen))
2435 Desired_Case := Identifier_Casing (J);
2440 -- Copy identifier as given to Name_Buffer
2442 for J in Name_Buffer'Range loop
2443 Name_Buffer (J) := Ident (J);
2445 if Name_Buffer (J) = ASCII.NUL then
2451 Set_Casing (Desired_Case);
2452 end Set_Identifier_Casing;
2454 -----------------------
2455 -- Set_Ignore_Errors --
2456 -----------------------
2458 procedure Set_Ignore_Errors (To : Boolean) is
2460 Errors_Must_Be_Ignored := To;
2461 end Set_Ignore_Errors;
2463 ------------------------------
2464 -- Set_Msg_Insertion_Column --
2465 ------------------------------
2467 procedure Set_Msg_Insertion_Column is
2469 if RM_Column_Check then
2470 Set_Msg_Str (" in column ");
2471 Set_Msg_Int (Int (Error_Msg_Col) + 1);
2473 end Set_Msg_Insertion_Column;
2475 ----------------------------
2476 -- Set_Msg_Insertion_Node --
2477 ----------------------------
2479 procedure Set_Msg_Insertion_Node is
2484 Error_Msg_Node_1 = Error
2485 or else Error_Msg_Node_1 = Any_Type;
2487 if Error_Msg_Node_1 = Empty then
2488 Set_Msg_Blank_Conditional;
2489 Set_Msg_Str ("<empty>");
2491 elsif Error_Msg_Node_1 = Error then
2493 Set_Msg_Str ("<error>");
2495 elsif Error_Msg_Node_1 = Standard_Void_Type then
2497 Set_Msg_Str ("procedure name");
2499 elsif Nkind (Error_Msg_Node_1) in N_Entity
2500 and then Ekind (Error_Msg_Node_1) = E_Anonymous_Access_Subprogram_Type
2503 Set_Msg_Str ("access to subprogram");
2506 Set_Msg_Blank_Conditional;
2510 K := Nkind (Error_Msg_Node_1);
2512 -- If we have operator case, skip quotes since name of operator
2513 -- itself will supply the required quotations. An operator can be an
2514 -- applied use in an expression or an explicit operator symbol, or an
2515 -- identifier whose name indicates it is an operator.
2518 or else K = N_Operator_Symbol
2519 or else K = N_Defining_Operator_Symbol
2520 or else ((K = N_Identifier or else K = N_Defining_Identifier)
2521 and then Is_Operator_Name (Chars (Error_Msg_Node_1)))
2523 Set_Msg_Node (Error_Msg_Node_1);
2525 -- Normal case, not an operator, surround with quotes
2529 Set_Qualification (Error_Msg_Qual_Level, Error_Msg_Node_1);
2530 Set_Msg_Node (Error_Msg_Node_1);
2535 -- The following assignment ensures that a second ampersand insertion
2536 -- character will correspond to the Error_Msg_Node_2 parameter. We
2537 -- suppress possible validity checks in case operating in -gnatVa mode,
2538 -- and Error_Msg_Node_2 is not needed and has not been set.
2541 pragma Suppress (Range_Check);
2543 Error_Msg_Node_1 := Error_Msg_Node_2;
2545 end Set_Msg_Insertion_Node;
2547 --------------------------------------
2548 -- Set_Msg_Insertion_Type_Reference --
2549 --------------------------------------
2551 procedure Set_Msg_Insertion_Type_Reference (Flag : Source_Ptr) is
2557 if Error_Msg_Node_1 = Standard_Void_Type then
2558 Set_Msg_Str ("package or procedure name");
2561 elsif Error_Msg_Node_1 = Standard_Exception_Type then
2562 Set_Msg_Str ("exception name");
2565 elsif Error_Msg_Node_1 = Any_Access
2566 or else Error_Msg_Node_1 = Any_Array
2567 or else Error_Msg_Node_1 = Any_Boolean
2568 or else Error_Msg_Node_1 = Any_Character
2569 or else Error_Msg_Node_1 = Any_Composite
2570 or else Error_Msg_Node_1 = Any_Discrete
2571 or else Error_Msg_Node_1 = Any_Fixed
2572 or else Error_Msg_Node_1 = Any_Integer
2573 or else Error_Msg_Node_1 = Any_Modular
2574 or else Error_Msg_Node_1 = Any_Numeric
2575 or else Error_Msg_Node_1 = Any_Real
2576 or else Error_Msg_Node_1 = Any_Scalar
2577 or else Error_Msg_Node_1 = Any_String
2579 Get_Unqualified_Decoded_Name_String (Chars (Error_Msg_Node_1));
2580 Set_Msg_Name_Buffer;
2583 elsif Error_Msg_Node_1 = Universal_Real then
2584 Set_Msg_Str ("type universal real");
2587 elsif Error_Msg_Node_1 = Universal_Integer then
2588 Set_Msg_Str ("type universal integer");
2591 elsif Error_Msg_Node_1 = Universal_Fixed then
2592 Set_Msg_Str ("type universal fixed");
2596 -- Special case of anonymous array
2598 if Nkind (Error_Msg_Node_1) in N_Entity
2599 and then Is_Array_Type (Error_Msg_Node_1)
2600 and then Present (Related_Array_Object (Error_Msg_Node_1))
2602 Set_Msg_Str ("type of ");
2603 Set_Msg_Node (Related_Array_Object (Error_Msg_Node_1));
2604 Set_Msg_Str (" declared");
2605 Set_Msg_Insertion_Line_Number
2606 (Sloc (Related_Array_Object (Error_Msg_Node_1)), Flag);
2610 -- If we fall through, it is not a special case, so first output
2611 -- the name of the type, preceded by private for a private type
2613 if Is_Private_Type (Error_Msg_Node_1) then
2614 Set_Msg_Str ("private type ");
2616 Set_Msg_Str ("type ");
2619 Ent := Error_Msg_Node_1;
2621 if Is_Internal_Name (Chars (Ent)) then
2622 Unwind_Internal_Type (Ent);
2625 -- Types in Standard are displayed as "Standard.name"
2627 if Sloc (Ent) <= Standard_Location then
2629 Set_Msg_Str ("Standard.");
2634 -- Types in other language defined units are displayed as
2635 -- "package-name.type-name"
2638 Is_Predefined_File_Name (Unit_File_Name (Get_Source_Unit (Ent)))
2640 Get_Unqualified_Decoded_Name_String
2641 (Unit_Name (Get_Source_Unit (Ent)));
2642 Name_Len := Name_Len - 2;
2643 Set_Msg_Blank_Conditional;
2645 Set_Casing (Mixed_Case);
2646 Set_Msg_Name_Buffer;
2648 Set_Casing (Mixed_Case);
2653 -- All other types display as "type name" defined at line xxx
2654 -- possibly qualified if qualification is requested.
2658 Set_Qualification (Error_Msg_Qual_Level, Ent);
2662 -- If we did not print a name (e.g. in the case of an anonymous
2663 -- subprogram type), there is no name to print, so remove quotes.
2665 if Buffer_Ends_With ('"') then
2666 Buffer_Remove ('"');
2672 -- If the original type did not come from a predefined file, add the
2673 -- location where the type was defined.
2675 if Sloc (Error_Msg_Node_1) > Standard_Location
2677 not Is_Predefined_File_Name
2678 (Unit_File_Name (Get_Source_Unit (Error_Msg_Node_1)))
2680 Set_Msg_Str (" defined");
2681 Set_Msg_Insertion_Line_Number (Sloc (Error_Msg_Node_1), Flag);
2683 -- If it did come from a predefined file, deal with the case where
2684 -- this was a file with a generic instantiation from elsewhere.
2687 if Sloc (Error_Msg_Node_1) > Standard_Location then
2689 Iloc : constant Source_Ptr :=
2690 Instantiation_Location (Sloc (Error_Msg_Node_1));
2693 if Iloc /= No_Location
2694 and then not Suppress_Instance_Location
2696 Set_Msg_Str (" from instance");
2697 Set_Msg_Insertion_Line_Number (Iloc, Flag);
2702 end Set_Msg_Insertion_Type_Reference;
2704 ---------------------------------
2705 -- Set_Msg_Insertion_Unit_Name --
2706 ---------------------------------
2708 procedure Set_Msg_Insertion_Unit_Name (Suffix : Boolean := True) is
2710 if Error_Msg_Unit_1 = No_Unit_Name then
2713 elsif Error_Msg_Unit_1 = Error_Unit_Name then
2715 Set_Msg_Str ("<error>");
2718 Get_Unit_Name_String (Error_Msg_Unit_1, Suffix);
2721 Set_Msg_Name_Buffer;
2725 -- The following assignment ensures that a second percent insertion
2726 -- character will correspond to the Error_Msg_Unit_2 parameter. We
2727 -- suppress possible validity checks in case operating in -gnatVa mode,
2728 -- and Error_Msg_Unit_2 is not needed and has not been set.
2731 pragma Suppress (Range_Check);
2733 Error_Msg_Unit_1 := Error_Msg_Unit_2;
2735 end Set_Msg_Insertion_Unit_Name;
2741 procedure Set_Msg_Node (Node : Node_Id) is
2747 case Nkind (Node) is
2748 when N_Designator =>
2749 Set_Msg_Node (Name (Node));
2751 Set_Msg_Node (Identifier (Node));
2754 when N_Defining_Program_Unit_Name =>
2755 Set_Msg_Node (Name (Node));
2757 Set_Msg_Node (Defining_Identifier (Node));
2760 when N_Selected_Component | N_Expanded_Name =>
2761 Set_Msg_Node (Prefix (Node));
2763 Set_Msg_Node (Selector_Name (Node));
2770 -- The only remaining possibilities are identifiers, defining
2771 -- identifiers, pragmas, and pragma argument associations.
2773 if Nkind (Node) = N_Pragma then
2774 Nam := Pragma_Name (Node);
2777 -- The other cases have Chars fields, and we want to test for possible
2778 -- internal names, which generally represent something gone wrong. An
2779 -- exception is the case of internal type names, where we try to find a
2780 -- reasonable external representation for the external name
2782 elsif Is_Internal_Name (Chars (Node))
2784 ((Is_Entity_Name (Node)
2785 and then Present (Entity (Node))
2786 and then Is_Type (Entity (Node)))
2788 (Nkind (Node) = N_Defining_Identifier and then Is_Type (Node)))
2790 if Nkind (Node) = N_Identifier then
2791 Ent := Entity (Node);
2798 -- If the type is the designated type of an access_to_subprogram,
2799 -- then there is no name to provide in the call.
2801 if Ekind (Ent) = E_Subprogram_Type then
2804 -- Otherwise, we will be able to find some kind of name to output
2807 Unwind_Internal_Type (Ent);
2811 -- If not internal name, just use name in Chars field
2814 Nam := Chars (Node);
2818 -- At this stage, the name to output is in Nam
2820 Get_Unqualified_Decoded_Name_String (Nam);
2822 -- Remove trailing upper case letters from the name (useful for
2823 -- dealing with some cases of internal names).
2825 while Name_Len > 1 and then Name_Buffer (Name_Len) in 'A' .. 'Z' loop
2826 Name_Len := Name_Len - 1;
2829 -- If we have any of the names from standard that start with the
2830 -- characters "any " (e.g. Any_Type), then kill the message since
2831 -- almost certainly it is a junk cascaded message.
2834 and then Name_Buffer (1 .. 4) = "any "
2836 Kill_Message := True;
2839 -- Remaining step is to adjust casing and possibly add 'Class
2841 Adjust_Name_Case (Loc);
2842 Set_Msg_Name_Buffer;
2850 procedure Set_Msg_Text (Text : String; Flag : Source_Ptr) is
2851 C : Character; -- Current character
2852 P : Natural; -- Current index;
2854 procedure Skip_Msg_Insertion_Warning (C : Character);
2855 -- Deal with ? ?? ?x? ?X? ?*? ?$? insertion sequences (and the same
2856 -- sequences using < instead of ?). The caller has already bumped
2857 -- the pointer past the initial ? or < and C is set to this initial
2858 -- character (? or <). This procedure skips past the rest of the
2859 -- sequence. We do not need to set Msg_Insertion_Char, since this
2860 -- was already done during the message prescan.
2862 --------------------------------
2863 -- Skip_Msg_Insertion_Warning --
2864 --------------------------------
2866 procedure Skip_Msg_Insertion_Warning (C : Character) is
2868 if P <= Text'Last and then Text (P) = C then
2871 elsif P + 1 <= Text'Last
2872 and then (Text (P) in 'a' .. 'z'
2874 Text (P) in 'A' .. 'Z'
2879 and then Text (P + 1) = C
2883 end Skip_Msg_Insertion_Warning;
2885 -- Start of processing for Set_Msg_Text
2888 Manual_Quote_Mode := False;
2890 Flag_Source := Get_Source_File_Index (Flag);
2892 -- Skip info: at start, we have recorded this in Is_Info_Msg, and this
2893 -- will be used (Info field in error message object) to put back the
2894 -- string when it is printed. We need to do this, or we get confused
2895 -- with instantiation continuations.
2898 and then Text (Text'First .. Text'First + 5) = "info: "
2900 P := Text'First + 6;
2905 -- Loop through characters of message
2907 while P <= Text'Last loop
2911 -- Check for insertion character or sequence
2915 if P <= Text'Last and then Text (P) = '%' then
2917 Set_Msg_Insertion_Name_Literal;
2919 Set_Msg_Insertion_Name;
2923 if P <= Text'Last and then Text (P) = '$' then
2925 Set_Msg_Insertion_Unit_Name (Suffix => False);
2927 Set_Msg_Insertion_Unit_Name;
2931 Set_Msg_Insertion_File_Name;
2934 Set_Msg_Insertion_Type_Reference (Flag);
2937 Set_Msg_Insertion_Reserved_Name;
2940 Set_Msg_Insertion_Node;
2943 Set_Msg_Insertion_Line_Number (Error_Msg_Sloc, Flag);
2946 Continuation := True;
2948 if Text (P) = '\' then
2949 Continuation_New_Line := True;
2954 Set_Msg_Insertion_Column;
2957 Set_Msg_Insertion_Run_Time_Name;
2960 Set_Msg_Insertion_Uint;
2963 Manual_Quote_Mode := not Manual_Quote_Mode;
2967 null; -- already dealt with
2970 Skip_Msg_Insertion_Warning ('?');
2973 Skip_Msg_Insertion_Warning ('<');
2976 null; -- already dealt with
2979 Set_Msg_Char (Text (P));
2983 Set_Msg_Str (Error_Msg_String (1 .. Error_Msg_Strlen));
2985 -- Upper case letter
2989 -- Start of reserved word if two or more
2991 if P <= Text'Last and then Text (P) in 'A' .. 'Z' then
2993 Set_Msg_Insertion_Reserved_Word (Text, P);
2995 -- Single upper case letter is just inserted
3001 -- '[' (will be/would have been raised at run time)
3004 if Is_Warning_Msg then
3005 Set_Msg_Str ("will be raised at run time");
3007 Set_Msg_Str ("would have been raised at run time");
3010 -- ']' (may be/might have been raised at run time)
3013 if Is_Warning_Msg then
3014 Set_Msg_Str ("may be raised at run time");
3016 Set_Msg_Str ("might have been raised at run time");
3019 -- Normal character with no special treatment
3031 procedure Set_Posted (N : Node_Id) is
3035 if Is_Serious_Error then
3037 -- We always set Error_Posted on the node itself
3039 Set_Error_Posted (N);
3041 -- If it is a subexpression, then set Error_Posted on parents up to
3042 -- and including the first non-subexpression construct. This helps
3043 -- avoid cascaded error messages within a single expression.
3049 Set_Error_Posted (P);
3050 exit when Nkind (P) not in N_Subexpr;
3053 if Nkind_In (P, N_Pragma_Argument_Association,
3054 N_Component_Association,
3055 N_Discriminant_Association,
3056 N_Generic_Association,
3057 N_Parameter_Association)
3059 Set_Error_Posted (Parent (P));
3062 -- A special check, if we just posted an error on an attribute
3063 -- definition clause, then also set the entity involved as posted.
3064 -- For example, this stops complaining about the alignment after
3065 -- complaining about the size, which is likely to be useless.
3067 if Nkind (P) = N_Attribute_Definition_Clause then
3068 if Is_Entity_Name (Name (P)) then
3069 Set_Error_Posted (Entity (Name (P)));
3075 -----------------------
3076 -- Set_Qualification --
3077 -----------------------
3079 procedure Set_Qualification (N : Nat; E : Entity_Id) is
3081 if N /= 0 and then Scope (E) /= Standard_Standard then
3082 Set_Qualification (N - 1, Scope (E));
3083 Set_Msg_Node (Scope (E));
3086 end Set_Qualification;
3088 ------------------------
3089 -- Special_Msg_Delete --
3090 ------------------------
3092 -- Is it really right to have all this specialized knowledge in errout?
3094 function Special_Msg_Delete
3096 N : Node_Or_Entity_Id;
3097 E : Node_Or_Entity_Id) return Boolean
3100 -- Never delete messages in -gnatdO mode
3102 if Debug_Flag_OO then
3105 -- Processing for "atomic access cannot be guaranteed"
3107 elsif Msg = "atomic access to & cannot be guaranteed" then
3109 -- When an atomic object refers to a non-atomic type in the same
3110 -- scope, we implicitly make the type atomic. In the non-error case
3111 -- this is surely safe (and in fact prevents an error from occurring
3112 -- if the type is not atomic by default). But if the object cannot be
3113 -- made atomic, then we introduce an extra junk message by this
3114 -- manipulation, which we get rid of here.
3116 -- We identify this case by the fact that it references a type for
3117 -- which Is_Atomic is set, but there is no Atomic pragma setting it.
3120 and then Is_Atomic (E)
3121 and then No (Get_Rep_Pragma (E, Name_Atomic))
3126 -- Processing for "Size too small" messages
3128 elsif Msg = "size for& too small, minimum allowed is ^" then
3130 -- Suppress "size too small" errors in CodePeer mode, since code may
3131 -- be analyzed in a different configuration than the one used for
3132 -- compilation. Even when the configurations match, this message
3133 -- may be issued on correct code, because pragma Pack is ignored
3134 -- in CodePeer mode.
3136 if CodePeer_Mode then
3139 -- When a size is wrong for a frozen type there is no explicit size
3140 -- clause, and other errors have occurred, suppress the message,
3141 -- since it is likely that this size error is a cascaded result of
3142 -- other errors. The reason we eliminate unfrozen types is that
3143 -- messages issued before the freeze type are for sure OK.
3146 and then Serious_Errors_Detected > 0
3147 and then Nkind (N) /= N_Component_Clause
3148 and then Nkind (Parent (N)) /= N_Component_Clause
3150 No (Get_Attribute_Definition_Clause (E, Attribute_Size))
3152 No (Get_Attribute_Definition_Clause (E, Attribute_Object_Size))
3154 No (Get_Attribute_Definition_Clause (E, Attribute_Value_Size))
3160 -- All special tests complete, so go ahead with message
3163 end Special_Msg_Delete;
3169 procedure SPARK_Msg_N (Msg : String; N : Node_Or_Entity_Id) is
3171 if SPARK_Mode /= Off then
3172 Error_Msg_N (Msg, N);
3180 procedure SPARK_Msg_NE
3182 N : Node_Or_Entity_Id;
3183 E : Node_Or_Entity_Id)
3186 if SPARK_Mode /= Off then
3187 Error_Msg_NE (Msg, N, E);
3191 --------------------------
3192 -- Unwind_Internal_Type --
3193 --------------------------
3195 procedure Unwind_Internal_Type (Ent : in out Entity_Id) is
3196 Derived : Boolean := False;
3198 Old_Ent : Entity_Id;
3201 -- Undo placement of a quote, since we will put it back later
3203 Mchar := Msg_Buffer (Msglen);
3206 Msglen := Msglen - 1;
3209 -- The loop here deals with recursive types, we are trying to find a
3210 -- related entity that is not an implicit type. Note that the check with
3211 -- Old_Ent stops us from getting "stuck". Also, we don't output the
3212 -- "type derived from" message more than once in the case where we climb
3213 -- up multiple levels.
3218 -- Implicit access type, use directly designated type In Ada 2005,
3219 -- the designated type may be an anonymous access to subprogram, in
3220 -- which case we can only point to its definition.
3222 if Is_Access_Type (Ent) then
3223 if Ekind (Ent) = E_Access_Subprogram_Type
3224 or else Ekind (Ent) = E_Anonymous_Access_Subprogram_Type
3225 or else Is_Access_Protected_Subprogram_Type (Ent)
3227 Ent := Directly_Designated_Type (Ent);
3229 if not Comes_From_Source (Ent) then
3230 if Buffer_Ends_With ("type ") then
3231 Buffer_Remove ("type ");
3235 if Ekind (Ent) = E_Function then
3236 Set_Msg_Str ("access to function ");
3237 elsif Ekind (Ent) = E_Procedure then
3238 Set_Msg_Str ("access to procedure ");
3240 Set_Msg_Str ("access to subprogram");
3245 -- Type is access to object, named or anonymous
3248 Set_Msg_Str ("access to ");
3249 Ent := Directly_Designated_Type (Ent);
3254 elsif Is_Class_Wide_Type (Ent) then
3256 Ent := Root_Type (Ent);
3258 -- Use base type if this is a subtype
3260 elsif Ent /= Base_Type (Ent) then
3261 Buffer_Remove ("type ");
3263 -- Avoid duplication "subtype of subtype of", and also replace
3264 -- "derived from subtype of" simply by "derived from"
3266 if not Buffer_Ends_With ("subtype of ")
3267 and then not Buffer_Ends_With ("derived from ")
3269 Set_Msg_Str ("subtype of ");
3272 Ent := Base_Type (Ent);
3274 -- If this is a base type with a first named subtype, use the first
3275 -- named subtype instead. This is not quite accurate in all cases,
3276 -- but it makes too much noise to be accurate and add 'Base in all
3277 -- cases. Note that we only do this is the first named subtype is not
3278 -- itself an internal name. This avoids the obvious loop (subtype ->
3279 -- basetype -> subtype) which would otherwise occur).
3283 FST : constant Entity_Id := First_Subtype (Ent);
3286 if not Is_Internal_Name (Chars (FST)) then
3290 -- Otherwise use root type
3294 Buffer_Remove ("type ");
3296 -- Test for "subtype of type derived from" which seems
3297 -- excessive and is replaced by "type derived from".
3299 Buffer_Remove ("subtype of");
3301 -- Avoid duplicated "type derived from type derived from"
3303 if not Buffer_Ends_With ("type derived from ") then
3304 Set_Msg_Str ("type derived from ");
3315 -- If we are stuck in a loop, get out and settle for the internal
3316 -- name after all. In this case we set to kill the message if it is
3317 -- not the first error message (we really try hard not to show the
3318 -- dirty laundry of the implementation to the poor user).
3320 if Ent = Old_Ent then
3321 Kill_Message := True;
3325 -- Get out if we finally found a non-internal name to use
3327 exit Find when not Is_Internal_Name (Chars (Ent));
3333 end Unwind_Internal_Type;
3335 --------------------
3336 -- Warn_Insertion --
3337 --------------------
3339 function Warn_Insertion return String is
3341 case Warning_Msg_Char is
3344 when 'a' .. 'z' | 'A' .. 'Z' | '*' | '$' =>
3345 return '?' & Warning_Msg_Char & '?';
3349 raise Program_Error;