1 ------------------------------------------------------------------------------
3 -- GNAT COMPILER COMPONENTS --
9 -- Copyright (C) 1992-2014, Free Software Foundation, Inc. --
11 -- GNAT is free software; you can redistribute it and/or modify it under --
12 -- terms of the GNU General Public License as published by the Free Soft- --
13 -- ware Foundation; either version 3, or (at your option) any later ver- --
14 -- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
15 -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
16 -- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License --
17 -- for more details. You should have received a copy of the GNU General --
18 -- Public License distributed with GNAT; see file COPYING3. If not, go to --
19 -- http://www.gnu.org/licenses for a complete copy of the license. --
21 -- GNAT was originally developed by the GNAT team at New York University. --
22 -- Extensive contributions were provided by Ada Core Technologies Inc. --
24 ------------------------------------------------------------------------------
26 -- Warning: Error messages can be generated during Gigi processing by direct
27 -- calls to error message routines, so it is essential that the processing
28 -- in this body be consistent with the requirements for the Gigi processing
29 -- environment, and that in particular, no disallowed table expansion is
32 with Atree; use Atree;
33 with Casing; use Casing;
34 with Csets; use Csets;
35 with Debug; use Debug;
36 with Einfo; use Einfo;
37 with Erroutc; use Erroutc;
38 with Fname; use Fname;
39 with Gnatvsn; use Gnatvsn;
40 with Hostparm; use Hostparm;
43 with Nlists; use Nlists;
44 with Output; use Output;
45 with Scans; use Scans;
46 with Sem_Aux; use Sem_Aux;
47 with Sinput; use Sinput;
48 with Sinfo; use Sinfo;
49 with Snames; use Snames;
50 with Stand; use Stand;
51 with Stylesw; use Stylesw;
52 with Uname; use Uname;
54 package body Errout is
56 Errors_Must_Be_Ignored : Boolean := False;
57 -- Set to True by procedure Set_Ignore_Errors (True), when calls to error
58 -- message procedures should be ignored (when parsing irrelevant text in
59 -- sources being preprocessed).
61 Finalize_Called : Boolean := False;
62 -- Set True if the Finalize routine has been called
64 Warn_On_Instance : Boolean;
65 -- Flag set true for warning message to be posted on instance
67 ------------------------------------
68 -- Table of Non-Instance Messages --
69 ------------------------------------
71 -- This table contains an entry for every error message processed by the
72 -- Error_Msg routine that is not posted on generic (or inlined) instance.
73 -- As explained in further detail in the Error_Msg procedure body, this
74 -- table is used to avoid posting redundant messages on instances.
76 type NIM_Record is record
80 -- Type used to store text and location of one message
82 package Non_Instance_Msgs is new Table.Table (
83 Table_Component_Type => NIM_Record,
84 Table_Index_Type => Int,
87 Table_Increment => 100,
88 Table_Name => "Non_Instance_Msgs");
90 -----------------------
91 -- Local Subprograms --
92 -----------------------
94 procedure Error_Msg_Internal
99 -- This is the low level routine used to post messages after dealing with
100 -- the issue of messages placed on instantiations (which get broken up
101 -- into separate calls in Error_Msg). Sptr is the location on which the
102 -- flag will be placed in the output. In the case where the flag is on
103 -- the template, this points directly to the template, not to one of the
104 -- instantiation copies of the template. Optr is the original location
105 -- used to flag the error, and this may indeed point to an instantiation
106 -- copy. So typically we can see Optr pointing to the template location
107 -- in an instantiation copy when Sptr points to the source location of
108 -- the actual instantiation (i.e the line with the new). Msg_Cont is
109 -- set true if this is a continuation message.
111 function No_Warnings (N : Node_Or_Entity_Id) return Boolean;
112 -- Determines if warnings should be suppressed for the given node
114 function OK_Node (N : Node_Id) return Boolean;
115 -- Determines if a node is an OK node to place an error message on (return
116 -- True) or if the error message should be suppressed (return False). A
117 -- message is suppressed if the node already has an error posted on it,
118 -- or if it refers to an Etype that has an error posted on it, or if
119 -- it references an Entity that has an error posted on it.
121 procedure Output_Source_Line
122 (L : Physical_Line_Number;
123 Sfile : Source_File_Index;
125 -- Outputs text of source line L, in file S, together with preceding line
126 -- number, as described above for Output_Line_Number. The Errs parameter
127 -- indicates if there are errors attached to the line, which forces
128 -- listing on, even in the presence of pragma List (Off).
130 procedure Set_Msg_Insertion_Column;
131 -- Handle column number insertion (@ insertion character)
133 procedure Set_Msg_Insertion_Node;
134 -- Handle node (name from node) insertion (& insertion character)
136 procedure Set_Msg_Insertion_Type_Reference (Flag : Source_Ptr);
137 -- Handle type reference (right brace insertion character). Flag is the
138 -- location of the flag, which is provided for the internal call to
139 -- Set_Msg_Insertion_Line_Number,
141 procedure Set_Msg_Insertion_Unit_Name (Suffix : Boolean := True);
142 -- Handle unit name insertion ($ insertion character). Depending on Boolean
143 -- parameter Suffix, (spec) or (body) is appended after the unit name.
145 procedure Set_Msg_Node (Node : Node_Id);
146 -- Add the sequence of characters for the name associated with the given
147 -- node to the current message. For N_Designator, N_Selected_Component,
148 -- N_Defining_Program_Unit_Name, and N_Expanded_Name, the Prefix is
151 procedure Set_Msg_Text (Text : String; Flag : Source_Ptr);
152 -- Add a sequence of characters to the current message. The characters may
153 -- be one of the special insertion characters (see documentation in spec).
154 -- Flag is the location at which the error is to be posted, which is used
155 -- to determine whether or not the # insertion needs a file name. The
156 -- variables Msg_Buffer are set on return Msglen.
158 procedure Set_Posted (N : Node_Id);
159 -- Sets the Error_Posted flag on the given node, and all its parents that
160 -- are subexpressions and then on the parent non-subexpression construct
161 -- that contains the original expression. If that parent is a named
162 -- association, the flag is further propagated to its parent. This is done
163 -- in order to guard against cascaded errors. Note that this call has an
164 -- effect for a serious error only.
166 procedure Set_Qualification (N : Nat; E : Entity_Id);
167 -- Outputs up to N levels of qualification for the given entity. For
168 -- example, the entity A.B.C.D will output B.C. if N = 2.
170 function Special_Msg_Delete
172 N : Node_Or_Entity_Id;
173 E : Node_Or_Entity_Id) return Boolean;
174 -- This function is called from Error_Msg_NEL, passing the message Msg,
175 -- node N on which the error is to be posted, and the entity or node E
176 -- to be used for an & insertion in the message if any. The job of this
177 -- procedure is to test for certain cascaded messages that we would like
178 -- to suppress. If the message is to be suppressed then we return True.
179 -- If the message should be generated (the normal case) False is returned.
181 procedure Unwind_Internal_Type (Ent : in out Entity_Id);
182 -- This procedure is given an entity id for an internal type, i.e. a type
183 -- with an internal name. It unwinds the type to try to get to something
184 -- reasonably printable, generating prefixes like "subtype of", "access
185 -- to", etc along the way in the buffer. The value in Ent on return is the
186 -- final name to be printed. Hopefully this is not an internal name, but in
187 -- some internal name cases, it is an internal name, and has to be printed
188 -- anyway (although in this case the message has been killed if possible).
189 -- The global variable Class_Flag is set to True if the resulting entity
190 -- should have 'Class appended to its name (see Add_Class procedure), and
191 -- is otherwise unchanged.
193 procedure VMS_Convert;
194 -- This procedure has no effect if called when the host is not OpenVMS. If
195 -- the host is indeed OpenVMS, then the error message stored in Msg_Buffer
196 -- is scanned for appearances of switch names which need converting to
197 -- corresponding VMS qualifier names. See Gnames/Vnames table in Errout
198 -- spec for precise definition of the conversion that is performed by this
199 -- routine in OpenVMS mode.
201 function Warn_Insertion return String;
202 -- This is called for warning messages only (so Warning_Msg_Char is set)
203 -- and returns a corresponding string to use at the beginning of generated
204 -- auxiliary messages, such as "in instantiation at ...".
205 -- 'a' .. 'z' returns "?x?"
206 -- 'A' .. 'Z' returns "?X?"
208 -- '$' returns "?$?info: "
210 -- No other settings are valid
212 -----------------------
213 -- Change_Error_Text --
214 -----------------------
216 procedure Change_Error_Text (Error_Id : Error_Msg_Id; New_Msg : String) is
217 Save_Next : Error_Msg_Id;
218 Err_Id : Error_Msg_Id := Error_Id;
221 Set_Msg_Text (New_Msg, Errors.Table (Error_Id).Sptr);
222 Errors.Table (Error_Id).Text := new String'(Msg_Buffer (1 .. Msglen));
224 -- If in immediate error message mode, output modified error message now
225 -- This is just a bit tricky, because we want to output just a single
226 -- message, and the messages we modified is already linked in. We solve
227 -- this by temporarily resetting its forward pointer to empty.
229 if Debug_Flag_OO then
230 Save_Next := Errors.Table (Error_Id).Next;
231 Errors.Table (Error_Id).Next := No_Error_Msg;
234 (Errors.Table (Error_Id).Line, Errors.Table (Error_Id).Sfile, True);
235 Output_Error_Msgs (Err_Id);
236 Errors.Table (Error_Id).Next := Save_Next;
238 end Change_Error_Text;
240 ------------------------
241 -- Compilation_Errors --
242 ------------------------
244 function Compilation_Errors return Boolean is
246 if not Finalize_Called then
249 return Erroutc.Compilation_Errors;
251 end Compilation_Errors;
253 --------------------------------------
254 -- Delete_Warning_And_Continuations --
255 --------------------------------------
257 procedure Delete_Warning_And_Continuations (Msg : Error_Msg_Id) is
261 pragma Assert (not Errors.Table (Msg).Msg_Cont);
266 M : Error_Msg_Object renames Errors.Table (Id);
269 if not M.Deleted then
271 Warnings_Detected := Warnings_Detected - 1;
274 Warnings_Treated_As_Errors := Warnings_Treated_As_Errors + 1;
279 exit when Id = No_Error_Msg;
280 exit when not Errors.Table (Id).Msg_Cont;
283 end Delete_Warning_And_Continuations;
289 -- Error_Msg posts a flag at the given location, except that if the
290 -- Flag_Location points within a generic template and corresponds to an
291 -- instantiation of this generic template, then the actual message will be
292 -- posted on the generic instantiation, along with additional messages
293 -- referencing the generic declaration.
295 procedure Error_Msg (Msg : String; Flag_Location : Source_Ptr) is
296 Sindex : Source_File_Index;
297 -- Source index for flag location
299 Orig_Loc : Source_Ptr;
300 -- Original location of Flag_Location (i.e. location in original
301 -- template in instantiation case, otherwise unchanged).
304 -- It is a fatal error to issue an error message when scanning from the
305 -- internal source buffer (see Sinput for further documentation)
307 pragma Assert (Sinput.Source /= Internal_Source_Ptr);
309 -- Return if all errors are to be ignored
311 if Errors_Must_Be_Ignored then
315 -- If we already have messages, and we are trying to place a message at
316 -- No_Location or in package Standard, then just ignore the attempt
317 -- since we assume that what is happening is some cascaded junk. Note
318 -- that this is safe in the sense that proceeding will surely bomb.
320 if Flag_Location < First_Source_Ptr
321 and then Total_Errors_Detected > 0
326 -- Start of processing for new message
328 Sindex := Get_Source_File_Index (Flag_Location);
329 Prescan_Message (Msg);
330 Orig_Loc := Original_Location (Flag_Location);
332 -- If the current location is in an instantiation, the issue arises of
333 -- whether to post the message on the template or the instantiation.
335 -- The way we decide is to see if we have posted the same message on
336 -- the template when we compiled the template (the template is always
337 -- compiled before any instantiations). For this purpose, we use a
338 -- separate table of messages. The reason we do this is twofold:
340 -- First, the messages can get changed by various processing
341 -- including the insertion of tokens etc, making it hard to
342 -- do the comparison.
344 -- Second, we will suppress a warning on a template if it is not in
345 -- the current extended source unit. That's reasonable and means we
346 -- don't want the warning on the instantiation here either, but it
347 -- does mean that the main error table would not in any case include
350 if Flag_Location = Orig_Loc then
351 Non_Instance_Msgs.Append ((new String'(Msg), Flag_Location));
352 Warn_On_Instance := False;
354 -- Here we have an instance message
357 -- Delete if debug flag off, and this message duplicates a message
358 -- already posted on the corresponding template
360 if not Debug_Flag_GG then
361 for J in Non_Instance_Msgs.First .. Non_Instance_Msgs.Last loop
362 if Msg = Non_Instance_Msgs.Table (J).Msg.all
363 and then Non_Instance_Msgs.Table (J).Loc = Orig_Loc
370 -- No duplicate, so error/warning will be posted on instance
372 Warn_On_Instance := Is_Warning_Msg;
375 -- Ignore warning message that is suppressed for this location. Note
376 -- that style checks are not considered warning messages for this
379 if Is_Warning_Msg and then Warnings_Suppressed (Orig_Loc) /= No_String
383 -- For style messages, check too many messages so far
386 and then Maximum_Messages /= 0
387 and then Warnings_Detected >= Maximum_Messages
392 -- The idea at this stage is that we have two kinds of messages
394 -- First, we have those messages that are to be placed as requested at
395 -- Flag_Location. This includes messages that have nothing to do with
396 -- generics, and also messages placed on generic templates that reflect
397 -- an error in the template itself. For such messages we simply call
398 -- Error_Msg_Internal to place the message in the requested location.
400 if Instantiation (Sindex) = No_Location then
401 Error_Msg_Internal (Msg, Flag_Location, Flag_Location, False);
405 -- If we are trying to flag an error in an instantiation, we may have
406 -- a generic contract violation. What we generate in this case is:
408 -- instantiation error at ...
409 -- original error message
413 -- warning: in instantiation at
414 -- warning: original warning message
416 -- All these messages are posted at the location of the top level
417 -- instantiation. If there are nested instantiations, then the
418 -- instantiation error message can be repeated, pointing to each
419 -- of the relevant instantiations.
421 -- Note: the instantiation mechanism is also shared for inlining of
422 -- subprogram bodies when front end inlining is done. In this case the
423 -- messages have the form:
425 -- in inlined body at ...
426 -- original error message
430 -- warning: in inlined body at
431 -- warning: original warning message
433 -- OK, here we have an instantiation error, and we need to generate the
434 -- error on the instantiation, rather than on the template.
437 Actual_Error_Loc : Source_Ptr;
438 -- Location of outer level instantiation in instantiation case, or
439 -- just a copy of Flag_Location in the normal case. This is the
440 -- location where all error messages will actually be posted.
442 Save_Error_Msg_Sloc : constant Source_Ptr := Error_Msg_Sloc;
443 -- Save possible location set for caller's message. We need to use
444 -- Error_Msg_Sloc for the location of the instantiation error but we
445 -- have to preserve a possible original value.
447 X : Source_File_Index;
449 Msg_Cont_Status : Boolean;
450 -- Used to label continuation lines in instantiation case with
451 -- proper Msg_Cont status.
454 -- Loop to find highest level instantiation, where all error
455 -- messages will be placed.
459 Actual_Error_Loc := Instantiation (X);
460 X := Get_Source_File_Index (Actual_Error_Loc);
461 exit when Instantiation (X) = No_Location;
464 -- Since we are generating the messages at the instantiation point in
465 -- any case, we do not want the references to the bad lines in the
466 -- instance to be annotated with the location of the instantiation.
468 Suppress_Instance_Location := True;
469 Msg_Cont_Status := False;
471 -- Loop to generate instantiation messages
473 Error_Msg_Sloc := Flag_Location;
474 X := Get_Source_File_Index (Flag_Location);
475 while Instantiation (X) /= No_Location loop
477 -- Suppress instantiation message on continuation lines
479 if Msg (Msg'First) /= '\' then
481 -- Case of inlined body
483 if Inlined_Body (X) then
484 if Is_Warning_Msg or Is_Style_Msg then
486 (Warn_Insertion & "in inlined body #",
487 Actual_Error_Loc, Flag_Location, Msg_Cont_Status);
490 ("error in inlined body #",
491 Actual_Error_Loc, Flag_Location, Msg_Cont_Status);
494 -- Case of generic instantiation
497 if Is_Warning_Msg or else Is_Style_Msg then
499 (Warn_Insertion & "in instantiation #",
500 Actual_Error_Loc, Flag_Location, Msg_Cont_Status);
503 ("instantiation error #",
504 Actual_Error_Loc, Flag_Location, Msg_Cont_Status);
509 Error_Msg_Sloc := Instantiation (X);
510 X := Get_Source_File_Index (Error_Msg_Sloc);
511 Msg_Cont_Status := True;
514 Suppress_Instance_Location := False;
515 Error_Msg_Sloc := Save_Error_Msg_Sloc;
517 -- Here we output the original message on the outer instantiation
520 (Msg, Actual_Error_Loc, Flag_Location, Msg_Cont_Status);
524 --------------------------------
525 -- Error_Msg_Ada_2012_Feature --
526 --------------------------------
528 procedure Error_Msg_Ada_2012_Feature (Feature : String; Loc : Source_Ptr) is
530 if Ada_Version < Ada_2012 then
531 Error_Msg (Feature & " is an Ada 2012 feature", Loc);
533 if No (Ada_Version_Pragma) then
534 Error_Msg ("\unit must be compiled with -gnat2012 switch", Loc);
536 Error_Msg_Sloc := Sloc (Ada_Version_Pragma);
537 Error_Msg ("\incompatible with Ada version set#", Loc);
540 end Error_Msg_Ada_2012_Feature;
546 procedure Error_Msg_AP (Msg : String) is
551 -- If we had saved the Scan_Ptr value after scanning the previous
552 -- token, then we would have exactly the right place for putting
553 -- the flag immediately at hand. However, that would add at least
554 -- two instructions to a Scan call *just* to service the possibility
555 -- of an Error_Msg_AP call. So instead we reconstruct that value.
557 -- We have two possibilities, start with Prev_Token_Ptr and skip over
558 -- the current token, which is made harder by the possibility that this
559 -- token may be in error, or start with Token_Ptr and work backwards.
560 -- We used to take the second approach, but it's hard because of
561 -- comments, and harder still because things that look like comments
562 -- can appear inside strings. So now we take the first approach.
564 -- Note: in the case where there is no previous token, Prev_Token_Ptr
565 -- is set to Source_First, which is a reasonable position for the
566 -- error flag in this situation.
568 S1 := Prev_Token_Ptr;
571 -- If the previous token is a string literal, we need a special approach
572 -- since there may be white space inside the literal and we don't want
573 -- to stop on that white space.
575 -- Note: since this is an error recovery issue anyway, it is not worth
576 -- worrying about special UTF_32 line terminator characters here.
578 if Prev_Token = Tok_String_Literal then
582 if Source (S1) = C then
584 exit when Source (S1) /= C;
585 elsif Source (S1) in Line_Terminator then
590 -- Character literal also needs special handling
592 elsif Prev_Token = Tok_Char_Literal then
595 -- Otherwise we search forward for the end of the current token, marked
596 -- by a line terminator, white space, a comment symbol or if we bump
597 -- into the following token (i.e. the current token).
599 -- Again, it is not worth worrying about UTF_32 special line terminator
600 -- characters in this context, since this is only for error recovery.
603 while Source (S1) not in Line_Terminator
604 and then Source (S1) /= ' '
605 and then Source (S1) /= ASCII.HT
606 and then (Source (S1) /= '-' or else Source (S1 + 1) /= '-')
607 and then S1 /= Token_Ptr
613 -- S1 is now set to the location for the flag
622 procedure Error_Msg_BC (Msg : String) is
624 -- If we are at end of file, post the flag after the previous token
626 if Token = Tok_EOF then
629 -- If we are at start of file, post the flag at the current token
631 elsif Token_Ptr = Source_First (Current_Source_File) then
634 -- If the character before the current token is a space or a horizontal
635 -- tab, then we place the flag on this character (in the case of a tab
636 -- we would really like to place it in the "last" character of the tab
637 -- space, but that it too much trouble to worry about).
639 elsif Source (Token_Ptr - 1) = ' '
640 or else Source (Token_Ptr - 1) = ASCII.HT
642 Error_Msg (Msg, Token_Ptr - 1);
644 -- If there is no space or tab before the current token, then there is
645 -- no room to place the flag before the token, so we place it on the
646 -- token instead (this happens for example at the start of a line).
649 Error_Msg (Msg, Token_Ptr);
657 procedure Error_Msg_CRT (Feature : String; N : Node_Id) is
658 CNRT : constant String := " not allowed in no run time mode";
659 CCRT : constant String := " not supported by configuration>";
661 S : String (1 .. Feature'Length + 1 + CCRT'Length);
666 S (2 .. Feature'Length + 1) := Feature;
667 L := Feature'Length + 2;
669 if No_Run_Time_Mode then
670 S (L .. L + CNRT'Length - 1) := CNRT;
671 L := L + CNRT'Length - 1;
673 else pragma Assert (Configurable_Run_Time_Mode);
674 S (L .. L + CCRT'Length - 1) := CCRT;
675 L := L + CCRT'Length - 1;
678 Error_Msg_N (S (1 .. L), N);
679 Configurable_Run_Time_Violations := Configurable_Run_Time_Violations + 1;
686 procedure Error_Msg_PT (Typ : Node_Id; Subp : Node_Id) is
689 ("first formal of & must be of mode `OUT`, `IN OUT` or " &
690 "access-to-variable", Typ, Subp);
692 ("\in order to be overridden by protected procedure or entry " &
693 "(RM 9.4(11.9/2))", Typ);
700 procedure Error_Msg_F (Msg : String; N : Node_Id) is
702 Error_Msg_NEL (Msg, N, N, Sloc (First_Node (N)));
709 procedure Error_Msg_FE
712 E : Node_Or_Entity_Id)
715 Error_Msg_NEL (Msg, N, E, Sloc (First_Node (N)));
718 ------------------------
719 -- Error_Msg_Internal --
720 ------------------------
722 procedure Error_Msg_Internal
728 Next_Msg : Error_Msg_Id;
729 -- Pointer to next message at insertion point
731 Prev_Msg : Error_Msg_Id;
732 -- Pointer to previous message at insertion point
734 Temp_Msg : Error_Msg_Id;
737 -- Set if warning to be treated as error
739 procedure Handle_Serious_Error;
740 -- Internal procedure to do all error message handling for a serious
741 -- error message, other than bumping the error counts and arranging
742 -- for the message to be output.
744 --------------------------
745 -- Handle_Serious_Error --
746 --------------------------
748 procedure Handle_Serious_Error is
750 -- Turn off code generation if not done already
752 if Operating_Mode = Generate_Code then
753 Operating_Mode := Check_Semantics;
754 Expander_Active := False;
757 -- Set the fatal error flag in the unit table unless we are in
758 -- Try_Semantics mode. This stops the semantics from being performed
759 -- if we find a serious error. This is skipped if we are currently
760 -- dealing with the configuration pragma file.
762 if not Try_Semantics and then Current_Source_Unit /= No_Unit then
763 Set_Fatal_Error (Get_Source_Unit (Sptr));
765 end Handle_Serious_Error;
767 -- Start of processing for Error_Msg_Internal
770 if Raise_Exception_On_Error /= 0 then
771 raise Error_Msg_Exception;
774 Continuation := Msg_Cont;
775 Continuation_New_Line := False;
776 Suppress_Message := False;
777 Kill_Message := False;
778 Set_Msg_Text (Msg, Sptr);
780 -- Kill continuation if parent message killed
782 if Continuation and Last_Killed then
786 -- Return without doing anything if message is suppressed
789 and then not All_Errors_Mode
790 and then not Is_Warning_Msg
791 and then not Is_Unconditional_Msg
793 if not Continuation then
800 -- Return without doing anything if message is killed and this is not
801 -- the first error message. The philosophy is that if we get a weird
802 -- error message and we already have had a message, then we hope the
803 -- weird message is a junk cascaded message
806 and then not All_Errors_Mode
807 and then Total_Errors_Detected /= 0
809 if not Continuation then
816 -- Special check for warning message to see if it should be output
818 if Is_Warning_Msg then
820 -- Immediate return if warning message and warnings are suppressed
822 if Warnings_Suppressed (Optr) /= No_String
824 Warnings_Suppressed (Sptr) /= No_String
826 Cur_Msg := No_Error_Msg;
830 -- If the flag location is in the main extended source unit then for
831 -- sure we want the warning since it definitely belongs
833 if In_Extended_Main_Source_Unit (Sptr) then
836 -- If the main unit has not been read yet. the warning must be on
837 -- a configuration file: gnat.adc or user-defined. This means we
838 -- are not parsing the main unit yet, so skip following checks.
840 elsif No (Cunit (Main_Unit)) then
843 -- If the flag location is not in the main extended source unit, then
844 -- we want to eliminate the warning, unless it is in the extended
845 -- main code unit and we want warnings on the instance.
847 elsif In_Extended_Main_Code_Unit (Sptr) and then Warn_On_Instance then
850 -- Keep warning if debug flag G set
852 elsif Debug_Flag_GG then
855 -- Keep warning if message text contains !!
857 elsif Has_Double_Exclam then
860 -- Here is where we delete a warning from a with'ed unit
863 Cur_Msg := No_Error_Msg;
865 if not Continuation then
873 -- If message is to be ignored in special ignore message mode, this is
874 -- where we do this special processing, bypassing message output.
876 if Ignore_Errors_Enable > 0 then
877 if Is_Serious_Error then
878 Handle_Serious_Error;
884 -- If error message line length set, and this is a continuation message
885 -- then all we do is to append the text to the text of the last message
886 -- with a comma space separator (eliminating a possible (style) or
889 if Error_Msg_Line_Length /= 0 and then Continuation then
890 Cur_Msg := Errors.Last;
893 Oldm : String_Ptr := Errors.Table (Cur_Msg).Text;
894 Newm : String (1 .. Oldm'Last + 2 + Msglen);
899 -- First copy old message to new one and free it
901 Newm (Oldm'Range) := Oldm.all;
905 -- Remove (style) or info: at start of message
907 if Msglen > 8 and then Msg_Buffer (1 .. 8) = "(style) " then
910 elsif Msglen > 6 and then Msg_Buffer (1 .. 6) = "info: " then
917 -- Now deal with separation between messages. Normally this is
918 -- simply comma space, but there are some special cases.
920 -- If continuation new line, then put actual NL character in msg
922 if Continuation_New_Line then
924 Newm (Newl) := ASCII.LF;
926 -- If continuation message is enclosed in parentheses, then
927 -- special treatment (don't need a comma, and we want to combine
928 -- successive parenthetical remarks into a single one with
929 -- separating commas).
931 elsif Msg_Buffer (M) = '(' and then Msg_Buffer (Msglen) = ')' then
933 -- Case where existing message ends in right paren, remove
934 -- and separate parenthetical remarks with a comma.
936 if Newm (Newl) = ')' then
938 Msg_Buffer (M) := ' ';
940 -- Case where we are adding new parenthetical comment
947 -- Case where continuation not in parens and no new line
950 Newm (Newl + 1 .. Newl + 2) := ", ";
954 -- Append new message
956 Newm (Newl + 1 .. Newl + Msglen - M + 1) :=
957 Msg_Buffer (M .. Msglen);
958 Newl := Newl + Msglen - M + 1;
959 Errors.Table (Cur_Msg).Text := new String'(Newm (1 .. Newl));
961 -- Update warning msg flag and message doc char if needed
963 if Is_Warning_Msg then
964 if not Errors.Table (Cur_Msg).Warn then
965 Errors.Table (Cur_Msg).Warn := True;
966 Errors.Table (Cur_Msg).Warn_Chr := Warning_Msg_Char;
968 elsif Warning_Msg_Char /= ' ' then
969 Errors.Table (Cur_Msg).Warn_Chr := Warning_Msg_Char;
977 -- Here we build a new error object
980 ((Text => new String'(Msg_Buffer (1 .. Msglen)),
981 Next => No_Error_Msg,
982 Prev => No_Error_Msg,
985 Sfile => Get_Source_File_Index (Sptr),
986 Line => Get_Physical_Line_Number (Sptr),
987 Col => Get_Column_Number (Sptr),
988 Warn => Is_Warning_Msg,
990 Warn_Err => False, -- reset below
991 Warn_Chr => Warning_Msg_Char,
992 Style => Is_Style_Msg,
993 Serious => Is_Serious_Error,
994 Uncond => Is_Unconditional_Msg,
995 Msg_Cont => Continuation,
997 Cur_Msg := Errors.Last;
999 -- Test if warning to be treated as error
1003 and then (Warning_Treated_As_Error (Msg_Buffer (1 .. Msglen))
1005 Warning_Treated_As_Error (Get_Warning_Tag (Cur_Msg)));
1007 -- Propagate Warn_Err to this message and preceding continuations
1009 for J in reverse 1 .. Errors.Last loop
1010 Errors.Table (J).Warn_Err := Warn_Err;
1011 exit when not Errors.Table (J).Msg_Cont;
1014 -- If immediate errors mode set, output error message now. Also output
1015 -- now if the -d1 debug flag is set (so node number message comes out
1016 -- just before actual error message)
1018 if Debug_Flag_OO or else Debug_Flag_1 then
1021 (Errors.Table (Cur_Msg).Line, Errors.Table (Cur_Msg).Sfile, True);
1022 Temp_Msg := Cur_Msg;
1023 Output_Error_Msgs (Temp_Msg);
1025 -- If not in immediate errors mode, then we insert the message in the
1026 -- error chain for later output by Finalize. The messages are sorted
1027 -- first by unit (main unit comes first), and within a unit by source
1028 -- location (earlier flag location first in the chain).
1031 -- First a quick check, does this belong at the very end of the chain
1032 -- of error messages. This saves a lot of time in the normal case if
1033 -- there are lots of messages.
1035 if Last_Error_Msg /= No_Error_Msg
1036 and then Errors.Table (Cur_Msg).Sfile =
1037 Errors.Table (Last_Error_Msg).Sfile
1038 and then (Sptr > Errors.Table (Last_Error_Msg).Sptr
1040 (Sptr = Errors.Table (Last_Error_Msg).Sptr
1042 Optr > Errors.Table (Last_Error_Msg).Optr))
1044 Prev_Msg := Last_Error_Msg;
1045 Next_Msg := No_Error_Msg;
1047 -- Otherwise do a full sequential search for the insertion point
1050 Prev_Msg := No_Error_Msg;
1051 Next_Msg := First_Error_Msg;
1052 while Next_Msg /= No_Error_Msg loop
1054 Errors.Table (Cur_Msg).Sfile < Errors.Table (Next_Msg).Sfile;
1056 if Errors.Table (Cur_Msg).Sfile = Errors.Table (Next_Msg).Sfile
1058 exit when Sptr < Errors.Table (Next_Msg).Sptr
1059 or else (Sptr = Errors.Table (Next_Msg).Sptr
1060 and then Optr < Errors.Table (Next_Msg).Optr);
1063 Prev_Msg := Next_Msg;
1064 Next_Msg := Errors.Table (Next_Msg).Next;
1068 -- Now we insert the new message in the error chain. The insertion
1069 -- point for the message is after Prev_Msg and before Next_Msg.
1071 -- The possible insertion point for the new message is after Prev_Msg
1072 -- and before Next_Msg. However, this is where we do a special check
1073 -- for redundant parsing messages, defined as messages posted on the
1074 -- same line. The idea here is that probably such messages are junk
1075 -- from the parser recovering. In full errors mode, we don't do this
1076 -- deletion, but otherwise such messages are discarded at this stage.
1078 if Prev_Msg /= No_Error_Msg
1079 and then Errors.Table (Prev_Msg).Line =
1080 Errors.Table (Cur_Msg).Line
1081 and then Errors.Table (Prev_Msg).Sfile =
1082 Errors.Table (Cur_Msg).Sfile
1083 and then Compiler_State = Parsing
1084 and then not All_Errors_Mode
1086 -- Don't delete unconditional messages and at this stage, don't
1087 -- delete continuation lines (we attempted to delete those earlier
1088 -- if the parent message was deleted.
1090 if not Errors.Table (Cur_Msg).Uncond
1091 and then not Continuation
1093 -- Don't delete if prev msg is warning and new msg is an error.
1094 -- This is because we don't want a real error masked by a
1095 -- warning. In all other cases (that is parse errors for the
1096 -- same line that are not unconditional) we do delete the
1097 -- message. This helps to avoid junk extra messages from
1098 -- cascaded parsing errors
1100 if not (Errors.Table (Prev_Msg).Warn
1102 Errors.Table (Prev_Msg).Style)
1104 (Errors.Table (Cur_Msg).Warn
1106 Errors.Table (Cur_Msg).Style)
1108 -- All tests passed, delete the message by simply returning
1109 -- without any further processing.
1111 if not Continuation then
1112 Last_Killed := True;
1120 -- Come here if message is to be inserted in the error chain
1122 if not Continuation then
1123 Last_Killed := False;
1126 if Prev_Msg = No_Error_Msg then
1127 First_Error_Msg := Cur_Msg;
1129 Errors.Table (Prev_Msg).Next := Cur_Msg;
1132 Errors.Table (Cur_Msg).Next := Next_Msg;
1134 if Next_Msg = No_Error_Msg then
1135 Last_Error_Msg := Cur_Msg;
1139 -- Bump appropriate statistics count
1141 if Errors.Table (Cur_Msg).Warn or else Errors.Table (Cur_Msg).Style then
1142 Warnings_Detected := Warnings_Detected + 1;
1145 Total_Errors_Detected := Total_Errors_Detected + 1;
1147 if Errors.Table (Cur_Msg).Serious then
1148 Serious_Errors_Detected := Serious_Errors_Detected + 1;
1149 Handle_Serious_Error;
1153 -- Record warning message issued
1155 if Errors.Table (Cur_Msg).Warn
1156 and then not Errors.Table (Cur_Msg).Msg_Cont
1158 Warning_Msg := Cur_Msg;
1161 -- If too many warnings turn off warnings
1163 if Maximum_Messages /= 0 then
1164 if Warnings_Detected = Maximum_Messages then
1165 Warning_Mode := Suppress;
1168 -- If too many errors abandon compilation
1170 if Total_Errors_Detected = Maximum_Messages then
1171 raise Unrecoverable_Error;
1174 end Error_Msg_Internal;
1180 procedure Error_Msg_N (Msg : String; N : Node_Or_Entity_Id) is
1182 Error_Msg_NEL (Msg, N, N, Sloc (N));
1189 procedure Error_Msg_NE
1191 N : Node_Or_Entity_Id;
1192 E : Node_Or_Entity_Id)
1195 Error_Msg_NEL (Msg, N, E, Sloc (N));
1202 procedure Error_Msg_NEL
1204 N : Node_Or_Entity_Id;
1205 E : Node_Or_Entity_Id;
1206 Flag_Location : Source_Ptr)
1209 if Special_Msg_Delete (Msg, N, E) then
1213 Prescan_Message (Msg);
1215 -- Special handling for warning messages
1217 if Is_Warning_Msg then
1219 -- Suppress if no warnings set for either entity or node
1221 if No_Warnings (N) or else No_Warnings (E) then
1223 -- Disable any continuation messages as well
1225 Last_Killed := True;
1229 -- Suppress if inside loop that is known to be null or is probably
1230 -- null (case where loop executes only if invalid values present).
1231 -- In either case warnings in the loop are likely to be junk.
1238 while Present (P) loop
1239 if Nkind (P) = N_Loop_Statement
1240 and then Suppress_Loop_Warnings (P)
1250 -- Test for message to be output
1253 or else Is_Unconditional_Msg
1254 or else Is_Warning_Msg
1256 or else (Msg (Msg'First) = '\' and then not Last_Killed)
1259 Error_Msg_Node_1 := E;
1260 Error_Msg (Msg, Flag_Location);
1263 Last_Killed := True;
1266 if not (Is_Warning_Msg or Is_Style_Msg) then
1275 procedure Error_Msg_NW
1278 N : Node_Or_Entity_Id)
1282 and then In_Extended_Main_Source_Unit (N)
1283 and then Comes_From_Source (N)
1285 Error_Msg_NEL (Msg, N, N, Sloc (N));
1293 procedure Error_Msg_S (Msg : String) is
1295 Error_Msg (Msg, Scan_Ptr);
1302 procedure Error_Msg_SC (Msg : String) is
1304 -- If we are at end of file, post the flag after the previous token
1306 if Token = Tok_EOF then
1309 -- For all other cases the message is posted at the current token
1313 Error_Msg (Msg, Token_Ptr);
1321 procedure Error_Msg_SP (Msg : String) is
1323 -- Note: in the case where there is no previous token, Prev_Token_Ptr
1324 -- is set to Source_First, which is a reasonable position for the
1325 -- error flag in this situation
1327 Error_Msg (Msg, Prev_Token_Ptr);
1334 procedure Finalize (Last_Call : Boolean) is
1339 procedure Delete_Warning (E : Error_Msg_Id);
1340 -- Delete a warning msg if not already deleted and adjust warning count
1342 --------------------
1343 -- Delete_Warning --
1344 --------------------
1346 procedure Delete_Warning (E : Error_Msg_Id) is
1348 if not Errors.Table (E).Deleted then
1349 Errors.Table (E).Deleted := True;
1350 Warnings_Detected := Warnings_Detected - 1;
1352 if Errors.Table (E).Warn_Err then
1353 Warnings_Treated_As_Errors := Warnings_Treated_As_Errors + 1;
1358 -- Start of processing for Finalize
1361 -- Set Prev pointers
1363 Cur := First_Error_Msg;
1364 while Cur /= No_Error_Msg loop
1365 Nxt := Errors.Table (Cur).Next;
1366 exit when Nxt = No_Error_Msg;
1367 Errors.Table (Nxt).Prev := Cur;
1371 -- Eliminate any duplicated error messages from the list. This is
1372 -- done after the fact to avoid problems with Change_Error_Text.
1374 Cur := First_Error_Msg;
1375 while Cur /= No_Error_Msg loop
1376 Nxt := Errors.Table (Cur).Next;
1379 while F /= No_Error_Msg
1380 and then Errors.Table (F).Sptr = Errors.Table (Cur).Sptr
1382 Check_Duplicate_Message (Cur, F);
1383 F := Errors.Table (F).Next;
1389 -- Mark any messages suppressed by specific warnings as Deleted
1391 Cur := First_Error_Msg;
1392 while Cur /= No_Error_Msg loop
1394 CE : Error_Msg_Object renames Errors.Table (Cur);
1395 Tag : constant String := Get_Warning_Tag (Cur);
1398 if (CE.Warn and not CE.Deleted)
1400 (Warning_Specifically_Suppressed (CE.Sptr, CE.Text, Tag) /=
1403 Warning_Specifically_Suppressed (CE.Optr, CE.Text, Tag) /=
1406 Delete_Warning (Cur);
1408 -- If this is a continuation, delete previous parts of message
1411 while Errors.Table (F).Msg_Cont loop
1412 F := Errors.Table (F).Prev;
1413 exit when F = No_Error_Msg;
1417 -- Delete any following continuations
1421 F := Errors.Table (F).Next;
1422 exit when F = No_Error_Msg;
1423 exit when not Errors.Table (F).Msg_Cont;
1429 Cur := Errors.Table (Cur).Next;
1432 Finalize_Called := True;
1434 -- Check consistency of specific warnings (may add warnings). We only
1435 -- do this on the last call, after all possible warnings are posted.
1438 Validate_Specific_Warnings (Error_Msg'Access);
1446 function First_Node (C : Node_Id) return Node_Id is
1447 Orig : constant Node_Id := Original_Node (C);
1448 Loc : constant Source_Ptr := Sloc (Orig);
1449 Sfile : constant Source_File_Index := Get_Source_File_Index (Loc);
1453 function Test_Earlier (N : Node_Id) return Traverse_Result;
1454 -- Function applied to every node in the construct
1456 procedure Search_Tree_First is new Traverse_Proc (Test_Earlier);
1457 -- Create traversal procedure
1463 function Test_Earlier (N : Node_Id) return Traverse_Result is
1464 Norig : constant Node_Id := Original_Node (N);
1465 Loc : constant Source_Ptr := Sloc (Norig);
1468 -- Check for earlier
1472 -- Ignore nodes with no useful location information
1474 and then Loc /= Standard_Location
1475 and then Loc /= No_Location
1477 -- Ignore nodes from a different file. This ensures against cases
1478 -- of strange foreign code somehow being present. We don't want
1479 -- wild placement of messages if that happens.
1481 and then Get_Source_File_Index (Loc) = Sfile
1490 -- Start of processing for First_Node
1493 if Nkind (Orig) in N_Subexpr then
1496 Search_Tree_First (Orig);
1508 function First_Sloc (N : Node_Id) return Source_Ptr is
1509 SI : constant Source_File_Index := Source_Index (Get_Source_Unit (N));
1510 SF : constant Source_Ptr := Source_First (SI);
1515 F := First_Node (N);
1518 -- The following circuit is a bit subtle. When we have parenthesized
1519 -- expressions, then the Sloc will not record the location of the paren,
1520 -- but we would like to post the flag on the paren. So what we do is to
1521 -- crawl up the tree from the First_Node, adjusting the Sloc value for
1522 -- any parentheses we know are present. Yes, we know this circuit is not
1523 -- 100% reliable (e.g. because we don't record all possible paren level
1524 -- values), but this is only for an error message so it is good enough.
1527 Paren_Loop : for J in 1 .. Paren_Count (F) loop
1529 -- We don't look more than 12 characters behind the current
1530 -- location, and in any case not past the front of the source.
1532 Search_Loop : for K in 1 .. 12 loop
1533 exit Search_Loop when S = SF;
1535 if Source_Text (SI) (S - 1) = '(' then
1539 elsif Source_Text (SI) (S - 1) <= ' ' then
1545 end loop Search_Loop;
1546 end loop Paren_Loop;
1548 exit Node_Loop when F = N;
1550 exit Node_Loop when Nkind (F) not in N_Subexpr;
1556 -----------------------
1557 -- Get_Ignore_Errors --
1558 -----------------------
1560 function Get_Ignore_Errors return Boolean is
1562 return Errors_Must_Be_Ignored;
1563 end Get_Ignore_Errors;
1569 procedure Initialize is
1572 First_Error_Msg := No_Error_Msg;
1573 Last_Error_Msg := No_Error_Msg;
1574 Serious_Errors_Detected := 0;
1575 Total_Errors_Detected := 0;
1576 Warnings_Treated_As_Errors := 0;
1577 Warnings_Detected := 0;
1578 Warnings_As_Errors_Count := 0;
1579 Cur_Msg := No_Error_Msg;
1582 -- Initialize warnings tables
1585 Specific_Warnings.Init;
1592 function No_Warnings (N : Node_Or_Entity_Id) return Boolean is
1594 if Error_Posted (N) then
1597 elsif Nkind (N) in N_Entity and then Has_Warnings_Off (N) then
1600 elsif Is_Entity_Name (N)
1601 and then Present (Entity (N))
1602 and then Has_Warnings_Off (Entity (N))
1615 function OK_Node (N : Node_Id) return Boolean is
1616 K : constant Node_Kind := Nkind (N);
1619 if Error_Posted (N) then
1622 elsif K in N_Has_Etype
1623 and then Present (Etype (N))
1624 and then Error_Posted (Etype (N))
1629 or else K = N_Attribute_Reference
1630 or else K = N_Character_Literal
1631 or else K = N_Expanded_Name
1632 or else K = N_Identifier
1633 or else K = N_Operator_Symbol)
1634 and then Present (Entity (N))
1635 and then Error_Posted (Entity (N))
1643 ---------------------
1644 -- Output_Messages --
1645 ---------------------
1647 procedure Output_Messages is
1651 procedure Write_Error_Summary;
1652 -- Write error summary
1654 procedure Write_Header (Sfile : Source_File_Index);
1655 -- Write header line (compiling or checking given file)
1657 procedure Write_Max_Errors;
1658 -- Write message if max errors reached
1660 -------------------------
1661 -- Write_Error_Summary --
1662 -------------------------
1664 procedure Write_Error_Summary is
1666 -- Extra blank line if error messages or source listing were output
1668 if Total_Errors_Detected + Warnings_Detected > 0
1674 -- Message giving number of lines read and number of errors detected.
1675 -- This normally goes to Standard_Output. The exception is when brief
1676 -- mode is not set, verbose mode (or full list mode) is set, and
1677 -- there are errors. In this case we send the message to standard
1678 -- error to make sure that *something* appears on standard error in
1679 -- an error situation.
1681 -- Formerly, only the "# errors" suffix was sent to stderr, whereas
1682 -- "# lines:" appeared on stdout. This caused problems on VMS when
1683 -- the stdout buffer was flushed, giving an extra line feed after
1686 if Total_Errors_Detected + Warnings_Detected /= 0
1687 and then not Brief_Output
1688 and then (Verbose_Mode or Full_List)
1693 -- Message giving total number of lines. Don't give this message if
1694 -- the Main_Source line is unknown (this happens in error situations,
1695 -- e.g. when integrated preprocessing fails).
1697 if Main_Source_File /= No_Source_File then
1699 Write_Int (Num_Source_Lines (Main_Source_File));
1701 if Num_Source_Lines (Main_Source_File) = 1 then
1702 Write_Str (" line: ");
1704 Write_Str (" lines: ");
1708 if Total_Errors_Detected = 0 then
1709 Write_Str ("No errors");
1711 elsif Total_Errors_Detected = 1 then
1712 Write_Str ("1 error");
1715 Write_Int (Total_Errors_Detected);
1716 Write_Str (" errors");
1719 if Warnings_Detected /= 0 then
1721 Write_Int (Warnings_Detected);
1722 Write_Str (" warning");
1724 if Warnings_Detected /= 1 then
1728 if Warning_Mode = Treat_As_Error then
1729 Write_Str (" (treated as error");
1731 if Warnings_Detected /= 1 then
1737 elsif Warnings_Treated_As_Errors /= 0 then
1739 Write_Int (Warnings_Treated_As_Errors);
1740 Write_Str (" treated as errors)");
1745 Set_Standard_Output;
1746 end Write_Error_Summary;
1752 procedure Write_Header (Sfile : Source_File_Index) is
1754 if Verbose_Mode or Full_List then
1755 if Original_Operating_Mode = Generate_Code then
1756 Write_Str ("Compiling: ");
1758 Write_Str ("Checking: ");
1761 Write_Name (Full_File_Name (Sfile));
1763 if not Debug_Flag_7 then
1765 Write_Str ("Source file time stamp: ");
1766 Write_Time_Stamp (Sfile);
1768 Write_Str ("Compiled at: " & Compilation_Time);
1775 ----------------------
1776 -- Write_Max_Errors --
1777 ----------------------
1779 procedure Write_Max_Errors is
1781 if Maximum_Messages /= 0 then
1782 if Warnings_Detected >= Maximum_Messages then
1784 Write_Line ("maximum number of warnings output");
1785 Write_Line ("any further warnings suppressed");
1786 Set_Standard_Output;
1789 -- If too many errors print message
1791 if Total_Errors_Detected >= Maximum_Messages then
1793 Write_Line ("fatal error: maximum number of errors detected");
1794 Set_Standard_Output;
1797 end Write_Max_Errors;
1799 -- Start of processing for Output_Messages
1802 -- Error if Finalize has not been called
1804 if not Finalize_Called then
1805 raise Program_Error;
1808 -- Reset current error source file if the main unit has a pragma
1809 -- Source_Reference. This ensures outputting the proper name of
1810 -- the source file in this situation.
1812 if Main_Source_File = No_Source_File
1813 or else Num_SRef_Pragmas (Main_Source_File) /= 0
1815 Current_Error_Source_File := No_Source_File;
1820 if Brief_Output or (not Full_List and not Verbose_Mode) then
1823 E := First_Error_Msg;
1824 while E /= No_Error_Msg loop
1825 if not Errors.Table (E).Deleted and then not Debug_Flag_KK then
1826 if Full_Path_Name_For_Brief_Errors then
1827 Write_Name (Full_Ref_Name (Errors.Table (E).Sfile));
1829 Write_Name (Reference_Name (Errors.Table (E).Sfile));
1833 Write_Int (Int (Physical_To_Logical
1834 (Errors.Table (E).Line,
1835 Errors.Table (E).Sfile)));
1838 if Errors.Table (E).Col < 10 then
1842 Write_Int (Int (Errors.Table (E).Col));
1844 Output_Msg_Text (E);
1848 E := Errors.Table (E).Next;
1851 Set_Standard_Output;
1854 -- Full source listing case
1857 List_Pragmas_Index := 1;
1858 List_Pragmas_Mode := True;
1859 E := First_Error_Msg;
1861 -- Normal case, to stdout (copyright notice already output)
1863 if Full_List_File_Name = null then
1864 if not Debug_Flag_7 then
1871 Create_List_File_Access.all (Full_List_File_Name.all);
1872 Set_Special_Output (Write_List_Info_Access.all'Access);
1874 -- Write copyright notice to file
1876 if not Debug_Flag_7 then
1877 Write_Str ("GNAT ");
1878 Write_Str (Gnat_Version_String);
1880 Write_Str ("Copyright 1992-" &
1882 ", Free Software Foundation, Inc.");
1887 -- First list extended main source file units with errors
1889 for U in Main_Unit .. Last_Unit loop
1890 if In_Extended_Main_Source_Unit (Cunit_Entity (U))
1892 -- If debug flag d.m is set, only the main source is listed
1894 and then (U = Main_Unit or else not Debug_Flag_Dot_M)
1896 -- If the unit of the entity does not come from source, it is
1897 -- an implicit subprogram declaration for a child subprogram.
1898 -- Do not emit errors for it, they are listed with the body.
1901 (No (Cunit_Entity (U))
1902 or else Comes_From_Source (Cunit_Entity (U))
1903 or else not Is_Subprogram (Cunit_Entity (U)))
1905 -- If the compilation unit associated with this unit does not
1906 -- come from source, it means it is an instantiation that should
1907 -- not be included in the source listing.
1909 and then Comes_From_Source (Cunit (U))
1912 Sfile : constant Source_File_Index := Source_Index (U);
1917 -- Only write the header if Sfile is known
1919 if Sfile /= No_Source_File then
1920 Write_Header (Sfile);
1924 -- Normally, we don't want an "error messages from file"
1925 -- message when listing the entire file, so we set the
1926 -- current source file as the current error source file.
1927 -- However, the old style of doing things was to list this
1928 -- message if pragma Source_Reference is present, even for
1929 -- the main unit. Since the purpose of the -gnatd.m switch
1930 -- is to duplicate the old behavior, we skip the reset if
1931 -- this debug flag is set.
1933 if not Debug_Flag_Dot_M then
1934 Current_Error_Source_File := Sfile;
1937 -- Only output the listing if Sfile is known, to avoid
1938 -- crashing the compiler.
1940 if Sfile /= No_Source_File then
1941 for N in 1 .. Last_Source_Line (Sfile) loop
1942 while E /= No_Error_Msg
1943 and then Errors.Table (E).Deleted
1945 E := Errors.Table (E).Next;
1950 and then Errors.Table (E).Line = N
1951 and then Errors.Table (E).Sfile = Sfile;
1953 Output_Source_Line (N, Sfile, Err_Flag);
1956 Output_Error_Msgs (E);
1958 if not Debug_Flag_2 then
1968 -- Then output errors, if any, for subsidiary units not in the
1969 -- main extended unit.
1971 -- Note: if debug flag d.m set, include errors for any units other
1972 -- than the main unit in the extended source unit (e.g. spec and
1973 -- subunits for a body).
1975 while E /= No_Error_Msg
1976 and then (not In_Extended_Main_Source_Unit (Errors.Table (E).Sptr)
1979 and then Get_Source_Unit
1980 (Errors.Table (E).Sptr) /= Main_Unit))
1982 if Errors.Table (E).Deleted then
1983 E := Errors.Table (E).Next;
1988 (Errors.Table (E).Line, Errors.Table (E).Sfile, True);
1989 Output_Error_Msgs (E);
1993 -- If output to file, write extra copy of error summary to the
1994 -- output file, and then close it.
1996 if Full_List_File_Name /= null then
1997 Write_Error_Summary;
1999 Close_List_File_Access.all;
2000 Cancel_Special_Output;
2004 -- Verbose mode (error lines only with error flags). Normally this is
2005 -- ignored in full list mode, unless we are listing to a file, in which
2006 -- case we still generate -gnatv output to standard output.
2009 and then (not Full_List or else Full_List_File_Name /= null)
2013 -- Output the header only when Main_Source_File is known
2015 if Main_Source_File /= No_Source_File then
2016 Write_Header (Main_Source_File);
2019 E := First_Error_Msg;
2021 -- Loop through error lines
2023 while E /= No_Error_Msg loop
2024 if Errors.Table (E).Deleted then
2025 E := Errors.Table (E).Next;
2029 (Errors.Table (E).Line, Errors.Table (E).Sfile, True);
2030 Output_Error_Msgs (E);
2035 -- Output error summary if verbose or full list mode
2037 if Verbose_Mode or else Full_List then
2038 Write_Error_Summary;
2043 if Warning_Mode = Treat_As_Error then
2044 Total_Errors_Detected := Total_Errors_Detected + Warnings_Detected;
2045 Warnings_Detected := 0;
2047 end Output_Messages;
2049 ------------------------
2050 -- Output_Source_Line --
2051 ------------------------
2053 procedure Output_Source_Line
2054 (L : Physical_Line_Number;
2055 Sfile : Source_File_Index;
2061 Line_Number_Output : Boolean := False;
2062 -- Set True once line number is output
2064 Empty_Line : Boolean := True;
2065 -- Set False if line includes at least one character
2068 if Sfile /= Current_Error_Source_File then
2069 Write_Str ("==============Error messages for ");
2071 case Sinput.File_Type (Sfile) is
2073 Write_Str ("source");
2075 when Sinput.Config =>
2076 Write_Str ("configuration pragmas");
2079 Write_Str ("symbol definition");
2081 when Sinput.Preproc =>
2082 Write_Str ("preprocessing data");
2085 Write_Str (" file: ");
2086 Write_Name (Full_File_Name (Sfile));
2089 if Num_SRef_Pragmas (Sfile) > 0 then
2090 Write_Str ("--------------Line numbers from file: ");
2091 Write_Name (Full_Ref_Name (Sfile));
2092 Write_Str (" (starting at line ");
2093 Write_Int (Int (First_Mapped_Line (Sfile)));
2098 Current_Error_Source_File := Sfile;
2101 if Errs or List_Pragmas_Mode then
2102 Output_Line_Number (Physical_To_Logical (L, Sfile));
2103 Line_Number_Output := True;
2106 S := Line_Start (L, Sfile);
2109 C := Source_Text (Sfile) (S);
2110 exit when C = ASCII.LF or else C = ASCII.CR or else C = EOF;
2112 -- Deal with matching entry in List_Pragmas table
2115 and then List_Pragmas_Index <= List_Pragmas.Last
2116 and then S = List_Pragmas.Table (List_Pragmas_Index).Ploc
2118 case List_Pragmas.Table (List_Pragmas_Index).Ptyp is
2122 -- Ignore if on line with errors so that error flags
2123 -- get properly listed with the error line .
2126 Write_Char (ASCII.FF);
2130 List_Pragmas_Mode := True;
2132 if not Line_Number_Output then
2133 Output_Line_Number (Physical_To_Logical (L, Sfile));
2134 Line_Number_Output := True;
2141 List_Pragmas_Mode := False;
2144 List_Pragmas_Index := List_Pragmas_Index + 1;
2146 -- Normal case (no matching entry in List_Pragmas table)
2149 if Errs or List_Pragmas_Mode then
2154 Empty_Line := False;
2158 -- If we have output a source line, then add the line terminator, with
2159 -- training spaces preserved (so we output the line exactly as input).
2161 if Line_Number_Output then
2165 Write_Eol_Keep_Blanks;
2168 end Output_Source_Line;
2170 -----------------------------
2171 -- Remove_Warning_Messages --
2172 -----------------------------
2174 procedure Remove_Warning_Messages (N : Node_Id) is
2176 function Check_For_Warning (N : Node_Id) return Traverse_Result;
2177 -- This function checks one node for a possible warning message
2179 function Check_All_Warnings is new Traverse_Func (Check_For_Warning);
2180 -- This defines the traversal operation
2182 -----------------------
2183 -- Check_For_Warning --
2184 -----------------------
2186 function Check_For_Warning (N : Node_Id) return Traverse_Result is
2187 Loc : constant Source_Ptr := Sloc (N);
2190 function To_Be_Removed (E : Error_Msg_Id) return Boolean;
2191 -- Returns True for a message that is to be removed. Also adjusts
2192 -- warning count appropriately.
2198 function To_Be_Removed (E : Error_Msg_Id) return Boolean is
2200 if E /= No_Error_Msg
2202 -- Don't remove if location does not match
2204 and then Errors.Table (E).Optr = Loc
2206 -- Don't remove if not warning/info message. Note that we do
2207 -- not remove style messages here. They are warning messages
2208 -- but not ones we want removed in this context.
2210 and then Errors.Table (E).Warn
2212 -- Don't remove unconditional messages
2214 and then not Errors.Table (E).Uncond
2216 Warnings_Detected := Warnings_Detected - 1;
2219 -- No removal required
2226 -- Start of processing for Check_For_Warnings
2229 while To_Be_Removed (First_Error_Msg) loop
2230 First_Error_Msg := Errors.Table (First_Error_Msg).Next;
2233 if First_Error_Msg = No_Error_Msg then
2234 Last_Error_Msg := No_Error_Msg;
2237 E := First_Error_Msg;
2238 while E /= No_Error_Msg loop
2239 while To_Be_Removed (Errors.Table (E).Next) loop
2240 Errors.Table (E).Next :=
2241 Errors.Table (Errors.Table (E).Next).Next;
2243 if Errors.Table (E).Next = No_Error_Msg then
2244 Last_Error_Msg := E;
2248 E := Errors.Table (E).Next;
2251 if Nkind (N) = N_Raise_Constraint_Error
2252 and then Original_Node (N) /= N
2253 and then No (Condition (N))
2255 -- Warnings may have been posted on subexpressions of the original
2256 -- tree. We place the original node back on the tree to remove
2257 -- those warnings, whose sloc do not match those of any node in
2258 -- the current tree. Given that we are in unreachable code, this
2259 -- modification to the tree is harmless.
2262 Status : Traverse_Final_Result;
2265 if Is_List_Member (N) then
2266 Set_Condition (N, Original_Node (N));
2267 Status := Check_All_Warnings (Condition (N));
2269 Rewrite (N, Original_Node (N));
2270 Status := Check_All_Warnings (N);
2279 end Check_For_Warning;
2281 -- Start of processing for Remove_Warning_Messages
2284 if Warnings_Detected /= 0 then
2286 Discard : Traverse_Final_Result;
2287 pragma Warnings (Off, Discard);
2290 Discard := Check_All_Warnings (N);
2293 end Remove_Warning_Messages;
2295 procedure Remove_Warning_Messages (L : List_Id) is
2298 if Is_Non_Empty_List (L) then
2300 while Present (Stat) loop
2301 Remove_Warning_Messages (Stat);
2305 end Remove_Warning_Messages;
2307 ---------------------------
2308 -- Set_Identifier_Casing --
2309 ---------------------------
2311 procedure Set_Identifier_Casing
2312 (Identifier_Name : System.Address;
2313 File_Name : System.Address)
2315 Ident : constant Big_String_Ptr := To_Big_String_Ptr (Identifier_Name);
2316 File : constant Big_String_Ptr := To_Big_String_Ptr (File_Name);
2319 Desired_Case : Casing_Type := Mixed_Case;
2320 -- Casing required for result. Default value of Mixed_Case is used if
2321 -- for some reason we cannot find the right file name in the table.
2324 -- Get length of file name
2327 while File (Flen + 1) /= ASCII.NUL loop
2331 -- Loop through file names to find matching one. This is a bit slow, but
2332 -- we only do it in error situations so it is not so terrible. Note that
2333 -- if the loop does not exit, then the desired case will be left set to
2334 -- Mixed_Case, this can happen if the name was not in canonical form,
2335 -- and gets canonicalized on VMS. Possibly we could fix this by
2336 -- unconditionally canonicalizing these names ???
2338 for J in 1 .. Last_Source_File loop
2339 Get_Name_String (Full_Debug_Name (J));
2342 and then Name_Buffer (1 .. Name_Len) = String (File (1 .. Flen))
2344 Desired_Case := Identifier_Casing (J);
2349 -- Copy identifier as given to Name_Buffer
2351 for J in Name_Buffer'Range loop
2352 Name_Buffer (J) := Ident (J);
2354 if Name_Buffer (J) = ASCII.NUL then
2360 Set_Casing (Desired_Case);
2361 end Set_Identifier_Casing;
2363 -----------------------
2364 -- Set_Ignore_Errors --
2365 -----------------------
2367 procedure Set_Ignore_Errors (To : Boolean) is
2369 Errors_Must_Be_Ignored := To;
2370 end Set_Ignore_Errors;
2372 ------------------------------
2373 -- Set_Msg_Insertion_Column --
2374 ------------------------------
2376 procedure Set_Msg_Insertion_Column is
2378 if RM_Column_Check then
2379 Set_Msg_Str (" in column ");
2380 Set_Msg_Int (Int (Error_Msg_Col) + 1);
2382 end Set_Msg_Insertion_Column;
2384 ----------------------------
2385 -- Set_Msg_Insertion_Node --
2386 ----------------------------
2388 procedure Set_Msg_Insertion_Node is
2393 Error_Msg_Node_1 = Error
2394 or else Error_Msg_Node_1 = Any_Type;
2396 if Error_Msg_Node_1 = Empty then
2397 Set_Msg_Blank_Conditional;
2398 Set_Msg_Str ("<empty>");
2400 elsif Error_Msg_Node_1 = Error then
2402 Set_Msg_Str ("<error>");
2404 elsif Error_Msg_Node_1 = Standard_Void_Type then
2406 Set_Msg_Str ("procedure name");
2408 elsif Nkind (Error_Msg_Node_1) in N_Entity
2409 and then Ekind (Error_Msg_Node_1) = E_Anonymous_Access_Subprogram_Type
2412 Set_Msg_Str ("access to subprogram");
2415 Set_Msg_Blank_Conditional;
2419 K := Nkind (Error_Msg_Node_1);
2421 -- If we have operator case, skip quotes since name of operator
2422 -- itself will supply the required quotations. An operator can be an
2423 -- applied use in an expression or an explicit operator symbol, or an
2424 -- identifier whose name indicates it is an operator.
2427 or else K = N_Operator_Symbol
2428 or else K = N_Defining_Operator_Symbol
2429 or else ((K = N_Identifier or else K = N_Defining_Identifier)
2430 and then Is_Operator_Name (Chars (Error_Msg_Node_1)))
2432 Set_Msg_Node (Error_Msg_Node_1);
2434 -- Normal case, not an operator, surround with quotes
2438 Set_Qualification (Error_Msg_Qual_Level, Error_Msg_Node_1);
2439 Set_Msg_Node (Error_Msg_Node_1);
2444 -- The following assignment ensures that a second ampersand insertion
2445 -- character will correspond to the Error_Msg_Node_2 parameter. We
2446 -- suppress possible validity checks in case operating in -gnatVa mode,
2447 -- and Error_Msg_Node_2 is not needed and has not been set.
2450 pragma Suppress (Range_Check);
2452 Error_Msg_Node_1 := Error_Msg_Node_2;
2454 end Set_Msg_Insertion_Node;
2456 --------------------------------------
2457 -- Set_Msg_Insertion_Type_Reference --
2458 --------------------------------------
2460 procedure Set_Msg_Insertion_Type_Reference (Flag : Source_Ptr) is
2466 if Error_Msg_Node_1 = Standard_Void_Type then
2467 Set_Msg_Str ("package or procedure name");
2470 elsif Error_Msg_Node_1 = Standard_Exception_Type then
2471 Set_Msg_Str ("exception name");
2474 elsif Error_Msg_Node_1 = Any_Access
2475 or else Error_Msg_Node_1 = Any_Array
2476 or else Error_Msg_Node_1 = Any_Boolean
2477 or else Error_Msg_Node_1 = Any_Character
2478 or else Error_Msg_Node_1 = Any_Composite
2479 or else Error_Msg_Node_1 = Any_Discrete
2480 or else Error_Msg_Node_1 = Any_Fixed
2481 or else Error_Msg_Node_1 = Any_Integer
2482 or else Error_Msg_Node_1 = Any_Modular
2483 or else Error_Msg_Node_1 = Any_Numeric
2484 or else Error_Msg_Node_1 = Any_Real
2485 or else Error_Msg_Node_1 = Any_Scalar
2486 or else Error_Msg_Node_1 = Any_String
2488 Get_Unqualified_Decoded_Name_String (Chars (Error_Msg_Node_1));
2489 Set_Msg_Name_Buffer;
2492 elsif Error_Msg_Node_1 = Universal_Real then
2493 Set_Msg_Str ("type universal real");
2496 elsif Error_Msg_Node_1 = Universal_Integer then
2497 Set_Msg_Str ("type universal integer");
2500 elsif Error_Msg_Node_1 = Universal_Fixed then
2501 Set_Msg_Str ("type universal fixed");
2505 -- Special case of anonymous array
2507 if Nkind (Error_Msg_Node_1) in N_Entity
2508 and then Is_Array_Type (Error_Msg_Node_1)
2509 and then Present (Related_Array_Object (Error_Msg_Node_1))
2511 Set_Msg_Str ("type of ");
2512 Set_Msg_Node (Related_Array_Object (Error_Msg_Node_1));
2513 Set_Msg_Str (" declared");
2514 Set_Msg_Insertion_Line_Number
2515 (Sloc (Related_Array_Object (Error_Msg_Node_1)), Flag);
2519 -- If we fall through, it is not a special case, so first output
2520 -- the name of the type, preceded by private for a private type
2522 if Is_Private_Type (Error_Msg_Node_1) then
2523 Set_Msg_Str ("private type ");
2525 Set_Msg_Str ("type ");
2528 Ent := Error_Msg_Node_1;
2530 if Is_Internal_Name (Chars (Ent)) then
2531 Unwind_Internal_Type (Ent);
2534 -- Types in Standard are displayed as "Standard.name"
2536 if Sloc (Ent) <= Standard_Location then
2538 Set_Msg_Str ("Standard.");
2543 -- Types in other language defined units are displayed as
2544 -- "package-name.type-name"
2547 Is_Predefined_File_Name (Unit_File_Name (Get_Source_Unit (Ent)))
2549 Get_Unqualified_Decoded_Name_String
2550 (Unit_Name (Get_Source_Unit (Ent)));
2551 Name_Len := Name_Len - 2;
2552 Set_Msg_Blank_Conditional;
2554 Set_Casing (Mixed_Case);
2555 Set_Msg_Name_Buffer;
2557 Set_Casing (Mixed_Case);
2562 -- All other types display as "type name" defined at line xxx
2563 -- possibly qualified if qualification is requested.
2567 Set_Qualification (Error_Msg_Qual_Level, Ent);
2571 -- If we did not print a name (e.g. in the case of an anonymous
2572 -- subprogram type), there is no name to print, so remove quotes.
2574 if Buffer_Ends_With ('"') then
2575 Buffer_Remove ('"');
2581 -- If the original type did not come from a predefined file, add the
2582 -- location where the type was defined.
2584 if Sloc (Error_Msg_Node_1) > Standard_Location
2586 not Is_Predefined_File_Name
2587 (Unit_File_Name (Get_Source_Unit (Error_Msg_Node_1)))
2589 Set_Msg_Str (" defined");
2590 Set_Msg_Insertion_Line_Number (Sloc (Error_Msg_Node_1), Flag);
2592 -- If it did come from a predefined file, deal with the case where
2593 -- this was a file with a generic instantiation from elsewhere.
2596 if Sloc (Error_Msg_Node_1) > Standard_Location then
2598 Iloc : constant Source_Ptr :=
2599 Instantiation_Location (Sloc (Error_Msg_Node_1));
2602 if Iloc /= No_Location
2603 and then not Suppress_Instance_Location
2605 Set_Msg_Str (" from instance");
2606 Set_Msg_Insertion_Line_Number (Iloc, Flag);
2611 end Set_Msg_Insertion_Type_Reference;
2613 ---------------------------------
2614 -- Set_Msg_Insertion_Unit_Name --
2615 ---------------------------------
2617 procedure Set_Msg_Insertion_Unit_Name (Suffix : Boolean := True) is
2619 if Error_Msg_Unit_1 = No_Unit_Name then
2622 elsif Error_Msg_Unit_1 = Error_Unit_Name then
2624 Set_Msg_Str ("<error>");
2627 Get_Unit_Name_String (Error_Msg_Unit_1, Suffix);
2630 Set_Msg_Name_Buffer;
2634 -- The following assignment ensures that a second percent insertion
2635 -- character will correspond to the Error_Msg_Unit_2 parameter. We
2636 -- suppress possible validity checks in case operating in -gnatVa mode,
2637 -- and Error_Msg_Unit_2 is not needed and has not been set.
2640 pragma Suppress (Range_Check);
2642 Error_Msg_Unit_1 := Error_Msg_Unit_2;
2644 end Set_Msg_Insertion_Unit_Name;
2650 procedure Set_Msg_Node (Node : Node_Id) is
2655 case Nkind (Node) is
2656 when N_Designator =>
2657 Set_Msg_Node (Name (Node));
2659 Set_Msg_Node (Identifier (Node));
2662 when N_Defining_Program_Unit_Name =>
2663 Set_Msg_Node (Name (Node));
2665 Set_Msg_Node (Defining_Identifier (Node));
2668 when N_Selected_Component | N_Expanded_Name =>
2669 Set_Msg_Node (Prefix (Node));
2671 Set_Msg_Node (Selector_Name (Node));
2678 -- The only remaining possibilities are identifiers, defining
2679 -- identifiers, pragmas, and pragma argument associations.
2681 if Nkind (Node) = N_Pragma then
2682 Nam := Pragma_Name (Node);
2684 -- The other cases have Chars fields, and we want to test for possible
2685 -- internal names, which generally represent something gone wrong. An
2686 -- exception is the case of internal type names, where we try to find a
2687 -- reasonable external representation for the external name
2689 elsif Is_Internal_Name (Chars (Node))
2691 ((Is_Entity_Name (Node)
2692 and then Present (Entity (Node))
2693 and then Is_Type (Entity (Node)))
2695 (Nkind (Node) = N_Defining_Identifier and then Is_Type (Node)))
2697 if Nkind (Node) = N_Identifier then
2698 Ent := Entity (Node);
2703 -- If the type is the designated type of an access_to_subprogram,
2704 -- then there is no name to provide in the call.
2706 if Ekind (Ent) = E_Subprogram_Type then
2709 -- Otherwise, we will be able to find some kind of name to output
2712 Unwind_Internal_Type (Ent);
2716 -- If not internal name, just use name in Chars field
2719 Nam := Chars (Node);
2722 -- At this stage, the name to output is in Nam
2724 Get_Unqualified_Decoded_Name_String (Nam);
2726 -- Remove trailing upper case letters from the name (useful for
2727 -- dealing with some cases of internal names.
2729 while Name_Len > 1 and then Name_Buffer (Name_Len) in 'A' .. 'Z' loop
2730 Name_Len := Name_Len - 1;
2733 -- If we have any of the names from standard that start with the
2734 -- characters "any " (e.g. Any_Type), then kill the message since
2735 -- almost certainly it is a junk cascaded message.
2738 and then Name_Buffer (1 .. 4) = "any "
2740 Kill_Message := True;
2743 -- Now we have to set the proper case. If we have a source location
2744 -- then do a check to see if the name in the source is the same name
2745 -- as the name in the Names table, except for possible differences
2746 -- in case, which is the case when we can copy from the source.
2749 Src_Loc : constant Source_Ptr := Sloc (Node);
2750 Sbuffer : Source_Buffer_Ptr;
2752 Src_Ptr : Source_Ptr;
2758 -- For standard locations, always use mixed case
2760 if Src_Loc <= No_Location
2761 or else Sloc (Node) <= No_Location
2763 Set_Casing (Mixed_Case);
2766 -- Determine if the reference we are dealing with corresponds to
2767 -- text at the point of the error reference. This will often be
2768 -- the case for simple identifier references, and is the case
2769 -- where we can copy the spelling from the source.
2771 Sbuffer := Source_Text (Get_Source_File_Index (Src_Loc));
2773 while Ref_Ptr <= Name_Len loop
2775 Fold_Lower (Sbuffer (Src_Ptr)) /=
2776 Fold_Lower (Name_Buffer (Ref_Ptr));
2777 Ref_Ptr := Ref_Ptr + 1;
2778 Src_Ptr := Src_Ptr + 1;
2781 -- If we get through the loop without a mismatch, then output the
2782 -- name the way it is spelled in the source program
2784 if Ref_Ptr > Name_Len then
2787 for J in 1 .. Name_Len loop
2788 Name_Buffer (J) := Sbuffer (Src_Ptr);
2789 Src_Ptr := Src_Ptr + 1;
2792 -- Otherwise set the casing using the default identifier casing
2795 Set_Casing (Identifier_Casing (Flag_Source), Mixed_Case);
2800 Set_Msg_Name_Buffer;
2808 procedure Set_Msg_Text (Text : String; Flag : Source_Ptr) is
2809 C : Character; -- Current character
2810 P : Natural; -- Current index;
2812 procedure Skip_Msg_Insertion_Warning (C : Character);
2813 -- Deal with ? ?? ?x? ?X? ?*? ?$? insertion sequences (and the same
2814 -- sequences using < instead of ?). The caller has already bumped
2815 -- the pointer past the initial ? or < and C is set to this initial
2816 -- character (? or <). This procedure skips past the rest of the
2817 -- sequence. We do not need to set Msg_Insertion_Char, since this
2818 -- was already done during the message prescan.
2820 --------------------------------
2821 -- Skip_Msg_Insertion_Warning --
2822 --------------------------------
2824 procedure Skip_Msg_Insertion_Warning (C : Character) is
2826 if P <= Text'Last and then Text (P) = C then
2829 elsif P + 1 <= Text'Last
2830 and then (Text (P) in 'a' .. 'z'
2832 Text (P) in 'A' .. 'Z'
2837 and then Text (P + 1) = C
2841 end Skip_Msg_Insertion_Warning;
2843 -- Start of processing for Set_Msg_Text
2846 Manual_Quote_Mode := False;
2848 Flag_Source := Get_Source_File_Index (Flag);
2850 -- Skip info: at start, we have recorded this in Is_Info_Msg, and this
2851 -- will be used (Info field in error message object) to put back the
2852 -- string when it is printed. We need to do this, or we get confused
2853 -- with instantiation continuations.
2856 and then Text (Text'First .. Text'First + 5) = "info: "
2858 P := Text'First + 6;
2863 -- Loop through characters of message
2865 while P <= Text'Last loop
2869 -- Check for insertion character or sequence
2873 if P <= Text'Last and then Text (P) = '%' then
2875 Set_Msg_Insertion_Name_Literal;
2877 Set_Msg_Insertion_Name;
2881 if P <= Text'Last and then Text (P) = '$' then
2883 Set_Msg_Insertion_Unit_Name (Suffix => False);
2885 Set_Msg_Insertion_Unit_Name;
2889 Set_Msg_Insertion_File_Name;
2892 Set_Msg_Insertion_Type_Reference (Flag);
2895 Set_Msg_Insertion_Reserved_Name;
2898 Set_Msg_Insertion_Node;
2901 Set_Msg_Insertion_Line_Number (Error_Msg_Sloc, Flag);
2904 Continuation := True;
2906 if Text (P) = '\' then
2907 Continuation_New_Line := True;
2912 Set_Msg_Insertion_Column;
2915 Set_Msg_Insertion_Run_Time_Name;
2918 Set_Msg_Insertion_Uint;
2921 Manual_Quote_Mode := not Manual_Quote_Mode;
2925 null; -- already dealt with
2928 Skip_Msg_Insertion_Warning ('?');
2931 Skip_Msg_Insertion_Warning ('<');
2934 null; -- already dealt with
2937 Set_Msg_Char (Text (P));
2941 Set_Msg_Str (Error_Msg_String (1 .. Error_Msg_Strlen));
2943 -- Upper case letter
2947 -- Start of reserved word if two or more
2949 if P <= Text'Last and then Text (P) in 'A' .. 'Z' then
2951 Set_Msg_Insertion_Reserved_Word (Text, P);
2953 -- Single upper case letter is just inserted
2959 -- '[' (will be/would have been raised at run time)
2962 if Is_Warning_Msg then
2963 Set_Msg_Str ("will be raised at run time");
2965 Set_Msg_Str ("would have been raised at run time");
2968 -- ']' (may be/might have been raised at run time)
2971 if Is_Warning_Msg then
2972 Set_Msg_Str ("may be raised at run time");
2974 Set_Msg_Str ("might have been raised at run time");
2977 -- Normal character with no special treatment
2991 procedure Set_Posted (N : Node_Id) is
2995 if Is_Serious_Error then
2997 -- We always set Error_Posted on the node itself
2999 Set_Error_Posted (N);
3001 -- If it is a subexpression, then set Error_Posted on parents up to
3002 -- and including the first non-subexpression construct. This helps
3003 -- avoid cascaded error messages within a single expression.
3009 Set_Error_Posted (P);
3010 exit when Nkind (P) not in N_Subexpr;
3013 if Nkind_In (P, N_Pragma_Argument_Association,
3014 N_Component_Association,
3015 N_Discriminant_Association,
3016 N_Generic_Association,
3017 N_Parameter_Association)
3019 Set_Error_Posted (Parent (P));
3022 -- A special check, if we just posted an error on an attribute
3023 -- definition clause, then also set the entity involved as posted.
3024 -- For example, this stops complaining about the alignment after
3025 -- complaining about the size, which is likely to be useless.
3027 if Nkind (P) = N_Attribute_Definition_Clause then
3028 if Is_Entity_Name (Name (P)) then
3029 Set_Error_Posted (Entity (Name (P)));
3035 -----------------------
3036 -- Set_Qualification --
3037 -----------------------
3039 procedure Set_Qualification (N : Nat; E : Entity_Id) is
3041 if N /= 0 and then Scope (E) /= Standard_Standard then
3042 Set_Qualification (N - 1, Scope (E));
3043 Set_Msg_Node (Scope (E));
3046 end Set_Qualification;
3048 ------------------------
3049 -- Special_Msg_Delete --
3050 ------------------------
3052 -- Is it really right to have all this specialized knowledge in errout?
3054 function Special_Msg_Delete
3056 N : Node_Or_Entity_Id;
3057 E : Node_Or_Entity_Id) return Boolean
3060 -- Never delete messages in -gnatdO mode
3062 if Debug_Flag_OO then
3065 -- Processing for "atomic access cannot be guaranteed"
3067 elsif Msg = "atomic access to & cannot be guaranteed" then
3069 -- When an atomic object refers to a non-atomic type in the same
3070 -- scope, we implicitly make the type atomic. In the non-error case
3071 -- this is surely safe (and in fact prevents an error from occurring
3072 -- if the type is not atomic by default). But if the object cannot be
3073 -- made atomic, then we introduce an extra junk message by this
3074 -- manipulation, which we get rid of here.
3076 -- We identify this case by the fact that it references a type for
3077 -- which Is_Atomic is set, but there is no Atomic pragma setting it.
3080 and then Is_Atomic (E)
3081 and then No (Get_Rep_Pragma (E, Name_Atomic))
3086 -- Processing for "Size too small" messages
3088 elsif Msg = "size for& too small, minimum allowed is ^" then
3090 -- Suppress "size too small" errors in CodePeer mode, since code may
3091 -- be analyzed in a different configuration than the one used for
3092 -- compilation. Even when the configurations match, this message
3093 -- may be issued on correct code, because pragma Pack is ignored
3094 -- in CodePeer mode.
3096 if CodePeer_Mode then
3099 -- When a size is wrong for a frozen type there is no explicit size
3100 -- clause, and other errors have occurred, suppress the message,
3101 -- since it is likely that this size error is a cascaded result of
3102 -- other errors. The reason we eliminate unfrozen types is that
3103 -- messages issued before the freeze type are for sure OK.
3106 and then Serious_Errors_Detected > 0
3107 and then Nkind (N) /= N_Component_Clause
3108 and then Nkind (Parent (N)) /= N_Component_Clause
3110 No (Get_Attribute_Definition_Clause (E, Attribute_Size))
3112 No (Get_Attribute_Definition_Clause (E, Attribute_Object_Size))
3114 No (Get_Attribute_Definition_Clause (E, Attribute_Value_Size))
3120 -- All special tests complete, so go ahead with message
3123 end Special_Msg_Delete;
3129 procedure SPARK_Msg_N (Msg : String; N : Node_Or_Entity_Id) is
3131 if SPARK_Mode = On then
3132 Error_Msg_N (Msg, N);
3140 procedure SPARK_Msg_NE
3142 N : Node_Or_Entity_Id;
3143 E : Node_Or_Entity_Id)
3146 if SPARK_Mode = On then
3147 Error_Msg_NE (Msg, N, E);
3151 --------------------------
3152 -- Unwind_Internal_Type --
3153 --------------------------
3155 procedure Unwind_Internal_Type (Ent : in out Entity_Id) is
3156 Derived : Boolean := False;
3158 Old_Ent : Entity_Id;
3161 -- Undo placement of a quote, since we will put it back later
3163 Mchar := Msg_Buffer (Msglen);
3166 Msglen := Msglen - 1;
3169 -- The loop here deals with recursive types, we are trying to find a
3170 -- related entity that is not an implicit type. Note that the check with
3171 -- Old_Ent stops us from getting "stuck". Also, we don't output the
3172 -- "type derived from" message more than once in the case where we climb
3173 -- up multiple levels.
3178 -- Implicit access type, use directly designated type In Ada 2005,
3179 -- the designated type may be an anonymous access to subprogram, in
3180 -- which case we can only point to its definition.
3182 if Is_Access_Type (Ent) then
3183 if Ekind (Ent) = E_Access_Subprogram_Type
3184 or else Ekind (Ent) = E_Anonymous_Access_Subprogram_Type
3185 or else Is_Access_Protected_Subprogram_Type (Ent)
3187 Ent := Directly_Designated_Type (Ent);
3189 if not Comes_From_Source (Ent) then
3190 if Buffer_Ends_With ("type ") then
3191 Buffer_Remove ("type ");
3195 if Ekind (Ent) = E_Function then
3196 Set_Msg_Str ("access to function ");
3197 elsif Ekind (Ent) = E_Procedure then
3198 Set_Msg_Str ("access to procedure ");
3200 Set_Msg_Str ("access to subprogram");
3205 -- Type is access to object, named or anonymous
3208 Set_Msg_Str ("access to ");
3209 Ent := Directly_Designated_Type (Ent);
3214 elsif Is_Class_Wide_Type (Ent) then
3216 Ent := Root_Type (Ent);
3218 -- Use base type if this is a subtype
3220 elsif Ent /= Base_Type (Ent) then
3221 Buffer_Remove ("type ");
3223 -- Avoid duplication "subtype of subtype of", and also replace
3224 -- "derived from subtype of" simply by "derived from"
3226 if not Buffer_Ends_With ("subtype of ")
3227 and then not Buffer_Ends_With ("derived from ")
3229 Set_Msg_Str ("subtype of ");
3232 Ent := Base_Type (Ent);
3234 -- If this is a base type with a first named subtype, use the first
3235 -- named subtype instead. This is not quite accurate in all cases,
3236 -- but it makes too much noise to be accurate and add 'Base in all
3237 -- cases. Note that we only do this is the first named subtype is not
3238 -- itself an internal name. This avoids the obvious loop (subtype ->
3239 -- basetype -> subtype) which would otherwise occur).
3243 FST : constant Entity_Id := First_Subtype (Ent);
3246 if not Is_Internal_Name (Chars (FST)) then
3250 -- Otherwise use root type
3254 Buffer_Remove ("type ");
3256 -- Test for "subtype of type derived from" which seems
3257 -- excessive and is replaced by "type derived from".
3259 Buffer_Remove ("subtype of");
3261 -- Avoid duplicated "type derived from type derived from"
3263 if not Buffer_Ends_With ("type derived from ") then
3264 Set_Msg_Str ("type derived from ");
3275 -- If we are stuck in a loop, get out and settle for the internal
3276 -- name after all. In this case we set to kill the message if it is
3277 -- not the first error message (we really try hard not to show the
3278 -- dirty laundry of the implementation to the poor user).
3280 if Ent = Old_Ent then
3281 Kill_Message := True;
3285 -- Get out if we finally found a non-internal name to use
3287 exit Find when not Is_Internal_Name (Chars (Ent));
3293 end Unwind_Internal_Type;
3299 procedure VMS_Convert is
3309 P := Msg_Buffer'First;
3315 if Msg_Buffer (P) = '-' then
3316 for G in Gnames'Range loop
3317 L := Gnames (G)'Length;
3319 -- See if we have "-ggg switch", where ggg is Gnames entry
3321 if P + L + 7 <= Msglen
3322 and then Msg_Buffer (P + 1 .. P + L) = Gnames (G).all
3323 and then Msg_Buffer (P + L + 1 .. P + L + 7) = " switch"
3325 -- Replace by "/vvv qualifier", where vvv is Vnames entry
3327 N := Vnames (G)'Length;
3328 Msg_Buffer (P + N + 11 .. Msglen + N - L + 3) :=
3329 Msg_Buffer (P + L + 8 .. Msglen);
3330 Msg_Buffer (P) := '/';
3331 Msg_Buffer (P + 1 .. P + N) := Vnames (G).all;
3332 Msg_Buffer (P + N + 1 .. P + N + 10) := " qualifier";
3334 Msglen := Msglen + N - L + 3;
3344 --------------------
3345 -- Warn_Insertion --
3346 --------------------
3348 function Warn_Insertion return String is
3350 case Warning_Msg_Char is
3353 when 'a' .. 'z' | 'A' .. 'Z' | '*' | '$' =>
3354 return '?' & Warning_Msg_Char & '?';
3358 raise Program_Error;