1 ------------------------------------------------------------------------------
3 -- GNAT COMPILER COMPONENTS --
9 -- Copyright (C) 1992-2016, 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 Record_Compilation_Errors : Boolean := False;
64 -- Record that a compilation error was witnessed during a given phase of
65 -- analysis for gnat2why. This is needed as Warning_Mode is modified twice
66 -- in gnat2why, hence Erroutc.Compilation_Errors can only return a suitable
67 -- value for each phase of analysis separately. This is updated at each
68 -- call to Compilation_Errors.
70 Warn_On_Instance : Boolean;
71 -- Flag set true for warning message to be posted on instance
73 ------------------------------------
74 -- Table of Non-Instance Messages --
75 ------------------------------------
77 -- This table contains an entry for every error message processed by the
78 -- Error_Msg routine that is not posted on generic (or inlined) instance.
79 -- As explained in further detail in the Error_Msg procedure body, this
80 -- table is used to avoid posting redundant messages on instances.
82 type NIM_Record is record
86 -- Type used to store text and location of one message
88 package Non_Instance_Msgs is new Table.Table (
89 Table_Component_Type => NIM_Record,
90 Table_Index_Type => Int,
93 Table_Increment => 100,
94 Table_Name => "Non_Instance_Msgs");
96 -----------------------
97 -- Local Subprograms --
98 -----------------------
100 procedure Error_Msg_Internal
105 -- This is the low level routine used to post messages after dealing with
106 -- the issue of messages placed on instantiations (which get broken up
107 -- into separate calls in Error_Msg). Sptr is the location on which the
108 -- flag will be placed in the output. In the case where the flag is on
109 -- the template, this points directly to the template, not to one of the
110 -- instantiation copies of the template. Optr is the original location
111 -- used to flag the error, and this may indeed point to an instantiation
112 -- copy. So typically we can see Optr pointing to the template location
113 -- in an instantiation copy when Sptr points to the source location of
114 -- the actual instantiation (i.e the line with the new). Msg_Cont is
115 -- set true if this is a continuation message.
117 function No_Warnings (N : Node_Or_Entity_Id) return Boolean;
118 -- Determines if warnings should be suppressed for the given node
120 function OK_Node (N : Node_Id) return Boolean;
121 -- Determines if a node is an OK node to place an error message on (return
122 -- True) or if the error message should be suppressed (return False). A
123 -- message is suppressed if the node already has an error posted on it,
124 -- or if it refers to an Etype that has an error posted on it, or if
125 -- it references an Entity that has an error posted on it.
127 procedure Output_Source_Line
128 (L : Physical_Line_Number;
129 Sfile : Source_File_Index;
131 -- Outputs text of source line L, in file S, together with preceding line
132 -- number, as described above for Output_Line_Number. The Errs parameter
133 -- indicates if there are errors attached to the line, which forces
134 -- listing on, even in the presence of pragma List (Off).
136 procedure Set_Msg_Insertion_Column;
137 -- Handle column number insertion (@ insertion character)
139 procedure Set_Msg_Insertion_Node;
140 -- Handle node (name from node) insertion (& insertion character)
142 procedure Set_Msg_Insertion_Type_Reference (Flag : Source_Ptr);
143 -- Handle type reference (right brace insertion character). Flag is the
144 -- location of the flag, which is provided for the internal call to
145 -- Set_Msg_Insertion_Line_Number,
147 procedure Set_Msg_Insertion_Unit_Name (Suffix : Boolean := True);
148 -- Handle unit name insertion ($ insertion character). Depending on Boolean
149 -- parameter Suffix, (spec) or (body) is appended after the unit name.
151 procedure Set_Msg_Node (Node : Node_Id);
152 -- Add the sequence of characters for the name associated with the given
153 -- node to the current message. For N_Designator, N_Selected_Component,
154 -- N_Defining_Program_Unit_Name, and N_Expanded_Name, the Prefix is
157 procedure Set_Msg_Text (Text : String; Flag : Source_Ptr);
158 -- Add a sequence of characters to the current message. The characters may
159 -- be one of the special insertion characters (see documentation in spec).
160 -- Flag is the location at which the error is to be posted, which is used
161 -- to determine whether or not the # insertion needs a file name. The
162 -- variables Msg_Buffer are set on return Msglen.
164 procedure Set_Posted (N : Node_Id);
165 -- Sets the Error_Posted flag on the given node, and all its parents that
166 -- are subexpressions and then on the parent non-subexpression construct
167 -- that contains the original expression. If that parent is a named
168 -- association, the flag is further propagated to its parent. This is done
169 -- in order to guard against cascaded errors. Note that this call has an
170 -- effect for a serious error only.
172 procedure Set_Qualification (N : Nat; E : Entity_Id);
173 -- Outputs up to N levels of qualification for the given entity. For
174 -- example, the entity A.B.C.D will output B.C. if N = 2.
176 function Special_Msg_Delete
178 N : Node_Or_Entity_Id;
179 E : Node_Or_Entity_Id) return Boolean;
180 -- This function is called from Error_Msg_NEL, passing the message Msg,
181 -- node N on which the error is to be posted, and the entity or node E
182 -- to be used for an & insertion in the message if any. The job of this
183 -- procedure is to test for certain cascaded messages that we would like
184 -- to suppress. If the message is to be suppressed then we return True.
185 -- If the message should be generated (the normal case) False is returned.
187 procedure Unwind_Internal_Type (Ent : in out Entity_Id);
188 -- This procedure is given an entity id for an internal type, i.e. a type
189 -- with an internal name. It unwinds the type to try to get to something
190 -- reasonably printable, generating prefixes like "subtype of", "access
191 -- to", etc along the way in the buffer. The value in Ent on return is the
192 -- final name to be printed. Hopefully this is not an internal name, but in
193 -- some internal name cases, it is an internal name, and has to be printed
194 -- anyway (although in this case the message has been killed if possible).
195 -- The global variable Class_Flag is set to True if the resulting entity
196 -- should have 'Class appended to its name (see Add_Class procedure), and
197 -- is otherwise unchanged.
199 function Warn_Insertion return String;
200 -- This is called for warning messages only (so Warning_Msg_Char is set)
201 -- and returns a corresponding string to use at the beginning of generated
202 -- auxiliary messages, such as "in instantiation at ...".
203 -- 'a' .. 'z' returns "?x?"
204 -- 'A' .. 'Z' returns "?X?"
206 -- '$' returns "?$?info: "
208 -- No other settings are valid
210 -----------------------
211 -- Change_Error_Text --
212 -----------------------
214 procedure Change_Error_Text (Error_Id : Error_Msg_Id; New_Msg : String) is
215 Save_Next : Error_Msg_Id;
216 Err_Id : Error_Msg_Id := Error_Id;
219 Set_Msg_Text (New_Msg, Errors.Table (Error_Id).Sptr);
220 Errors.Table (Error_Id).Text := new String'(Msg_Buffer (1 .. Msglen));
222 -- If in immediate error message mode, output modified error message now
223 -- This is just a bit tricky, because we want to output just a single
224 -- message, and the messages we modified is already linked in. We solve
225 -- this by temporarily resetting its forward pointer to empty.
227 if Debug_Flag_OO then
228 Save_Next := Errors.Table (Error_Id).Next;
229 Errors.Table (Error_Id).Next := No_Error_Msg;
232 (Errors.Table (Error_Id).Line, Errors.Table (Error_Id).Sfile, True);
233 Output_Error_Msgs (Err_Id);
234 Errors.Table (Error_Id).Next := Save_Next;
236 end Change_Error_Text;
238 ------------------------
239 -- Compilation_Errors --
240 ------------------------
242 function Compilation_Errors return Boolean is
244 if not Finalize_Called then
247 -- Record that a compilation error was witnessed during a given phase of
248 -- analysis for gnat2why. This is needed as Warning_Mode is modified
249 -- twice in gnat2why, hence Erroutc.Compilation_Errors can only return a
250 -- suitable value for each phase of analysis separately.
253 Record_Compilation_Errors :=
254 Record_Compilation_Errors or else Erroutc.Compilation_Errors;
256 return Record_Compilation_Errors;
258 end Compilation_Errors;
260 --------------------------------------
261 -- Delete_Warning_And_Continuations --
262 --------------------------------------
264 procedure Delete_Warning_And_Continuations (Msg : Error_Msg_Id) is
268 pragma Assert (not Errors.Table (Msg).Msg_Cont);
273 M : Error_Msg_Object renames Errors.Table (Id);
276 if not M.Deleted then
278 Warnings_Detected := Warnings_Detected - 1;
281 Info_Messages := Info_Messages - 1;
285 Warnings_Treated_As_Errors := Warnings_Treated_As_Errors - 1;
290 exit when Id = No_Error_Msg;
291 exit when not Errors.Table (Id).Msg_Cont;
294 end Delete_Warning_And_Continuations;
300 -- Error_Msg posts a flag at the given location, except that if the
301 -- Flag_Location points within a generic template and corresponds to an
302 -- instantiation of this generic template, then the actual message will be
303 -- posted on the generic instantiation, along with additional messages
304 -- referencing the generic declaration.
306 procedure Error_Msg (Msg : String; Flag_Location : Source_Ptr) is
307 Sindex : Source_File_Index;
308 -- Source index for flag location
310 Orig_Loc : Source_Ptr;
311 -- Original location of Flag_Location (i.e. location in original
312 -- template in instantiation case, otherwise unchanged).
315 -- It is a fatal error to issue an error message when scanning from the
316 -- internal source buffer (see Sinput for further documentation)
318 pragma Assert (Sinput.Source /= Internal_Source_Ptr);
320 -- Return if all errors are to be ignored
322 if Errors_Must_Be_Ignored then
326 -- If we already have messages, and we are trying to place a message at
327 -- No_Location, then just ignore the attempt since we assume that what
328 -- is happening is some cascaded junk. Note that this is safe in the
329 -- sense that proceeding will surely bomb. We will also bomb if the flag
330 -- location is No_Location and we don't have any messages so far, but
331 -- that is a real bug and a legitimate bomb, so we go ahead.
333 if Flag_Location = No_Location
334 and then Total_Errors_Detected > 0
339 -- Start of processing for new message
341 Sindex := Get_Source_File_Index (Flag_Location);
342 Prescan_Message (Msg);
343 Orig_Loc := Original_Location (Flag_Location);
345 -- If the current location is in an instantiation, the issue arises of
346 -- whether to post the message on the template or the instantiation.
348 -- The way we decide is to see if we have posted the same message on
349 -- the template when we compiled the template (the template is always
350 -- compiled before any instantiations). For this purpose, we use a
351 -- separate table of messages. The reason we do this is twofold:
353 -- First, the messages can get changed by various processing
354 -- including the insertion of tokens etc, making it hard to
355 -- do the comparison.
357 -- Second, we will suppress a warning on a template if it is not in
358 -- the current extended source unit. That's reasonable and means we
359 -- don't want the warning on the instantiation here either, but it
360 -- does mean that the main error table would not in any case include
363 if Flag_Location = Orig_Loc then
364 Non_Instance_Msgs.Append ((new String'(Msg), Flag_Location));
365 Warn_On_Instance := False;
367 -- Here we have an instance message
370 -- Delete if debug flag off, and this message duplicates a message
371 -- already posted on the corresponding template
373 if not Debug_Flag_GG then
374 for J in Non_Instance_Msgs.First .. Non_Instance_Msgs.Last loop
375 if Msg = Non_Instance_Msgs.Table (J).Msg.all
376 and then Non_Instance_Msgs.Table (J).Loc = Orig_Loc
383 -- No duplicate, so error/warning will be posted on instance
385 Warn_On_Instance := Is_Warning_Msg;
388 -- Ignore warning message that is suppressed for this location. Note
389 -- that style checks are not considered warning messages for this
392 if Is_Warning_Msg and then Warnings_Suppressed (Orig_Loc) /= No_String
396 -- For style messages, check too many messages so far
399 and then Maximum_Messages /= 0
400 and then Warnings_Detected >= Maximum_Messages
405 -- The idea at this stage is that we have two kinds of messages
407 -- First, we have those messages that are to be placed as requested at
408 -- Flag_Location. This includes messages that have nothing to do with
409 -- generics, and also messages placed on generic templates that reflect
410 -- an error in the template itself. For such messages we simply call
411 -- Error_Msg_Internal to place the message in the requested location.
413 if Instantiation (Sindex) = No_Location then
414 Error_Msg_Internal (Msg, Flag_Location, Flag_Location, False);
418 -- If we are trying to flag an error in an instantiation, we may have
419 -- a generic contract violation. What we generate in this case is:
421 -- instantiation error at ...
422 -- original error message
426 -- warning: in instantiation at
427 -- warning: original warning message
429 -- All these messages are posted at the location of the top level
430 -- instantiation. If there are nested instantiations, then the
431 -- instantiation error message can be repeated, pointing to each
432 -- of the relevant instantiations.
434 -- Note: the instantiation mechanism is also shared for inlining of
435 -- subprogram bodies when front end inlining is done. In this case the
436 -- messages have the form:
438 -- in inlined body at ...
439 -- original error message
443 -- warning: in inlined body at
444 -- warning: original warning message
446 -- OK, here we have an instantiation error, and we need to generate the
447 -- error on the instantiation, rather than on the template.
450 Actual_Error_Loc : Source_Ptr;
451 -- Location of outer level instantiation in instantiation case, or
452 -- just a copy of Flag_Location in the normal case. This is the
453 -- location where all error messages will actually be posted.
455 Save_Error_Msg_Sloc : constant Source_Ptr := Error_Msg_Sloc;
456 -- Save possible location set for caller's message. We need to use
457 -- Error_Msg_Sloc for the location of the instantiation error but we
458 -- have to preserve a possible original value.
460 X : Source_File_Index;
462 Msg_Cont_Status : Boolean;
463 -- Used to label continuation lines in instantiation case with
464 -- proper Msg_Cont status.
467 -- Loop to find highest level instantiation, where all error
468 -- messages will be placed.
472 Actual_Error_Loc := Instantiation (X);
473 X := Get_Source_File_Index (Actual_Error_Loc);
474 exit when Instantiation (X) = No_Location;
477 -- Since we are generating the messages at the instantiation point in
478 -- any case, we do not want the references to the bad lines in the
479 -- instance to be annotated with the location of the instantiation.
481 Suppress_Instance_Location := True;
482 Msg_Cont_Status := False;
484 -- Loop to generate instantiation messages
486 Error_Msg_Sloc := Flag_Location;
487 X := Get_Source_File_Index (Flag_Location);
488 while Instantiation (X) /= No_Location loop
490 -- Suppress instantiation message on continuation lines
492 if Msg (Msg'First) /= '\' then
494 -- Case of inlined body
496 if Inlined_Body (X) then
497 if Is_Warning_Msg or Is_Style_Msg then
499 (Warn_Insertion & "in inlined body #",
500 Actual_Error_Loc, Flag_Location, Msg_Cont_Status);
503 ("error in inlined body #",
504 Actual_Error_Loc, Flag_Location, Msg_Cont_Status);
507 -- Case of generic instantiation
510 if Is_Warning_Msg or else Is_Style_Msg then
512 (Warn_Insertion & "in instantiation #",
513 Actual_Error_Loc, Flag_Location, Msg_Cont_Status);
516 ("instantiation error #",
517 Actual_Error_Loc, Flag_Location, Msg_Cont_Status);
522 Error_Msg_Sloc := Instantiation (X);
523 X := Get_Source_File_Index (Error_Msg_Sloc);
524 Msg_Cont_Status := True;
527 Suppress_Instance_Location := False;
528 Error_Msg_Sloc := Save_Error_Msg_Sloc;
530 -- Here we output the original message on the outer instantiation
533 (Msg, Actual_Error_Loc, Flag_Location, Msg_Cont_Status);
537 --------------------------------
538 -- Error_Msg_Ada_2012_Feature --
539 --------------------------------
541 procedure Error_Msg_Ada_2012_Feature (Feature : String; Loc : Source_Ptr) is
543 if Ada_Version < Ada_2012 then
544 Error_Msg (Feature & " is an Ada 2012 feature", Loc);
546 if No (Ada_Version_Pragma) then
547 Error_Msg ("\unit must be compiled with -gnat2012 switch", Loc);
549 Error_Msg_Sloc := Sloc (Ada_Version_Pragma);
550 Error_Msg ("\incompatible with Ada version set#", Loc);
553 end Error_Msg_Ada_2012_Feature;
559 procedure Error_Msg_AP (Msg : String) is
564 -- If we had saved the Scan_Ptr value after scanning the previous
565 -- token, then we would have exactly the right place for putting
566 -- the flag immediately at hand. However, that would add at least
567 -- two instructions to a Scan call *just* to service the possibility
568 -- of an Error_Msg_AP call. So instead we reconstruct that value.
570 -- We have two possibilities, start with Prev_Token_Ptr and skip over
571 -- the current token, which is made harder by the possibility that this
572 -- token may be in error, or start with Token_Ptr and work backwards.
573 -- We used to take the second approach, but it's hard because of
574 -- comments, and harder still because things that look like comments
575 -- can appear inside strings. So now we take the first approach.
577 -- Note: in the case where there is no previous token, Prev_Token_Ptr
578 -- is set to Source_First, which is a reasonable position for the
579 -- error flag in this situation.
581 S1 := Prev_Token_Ptr;
584 -- If the previous token is a string literal, we need a special approach
585 -- since there may be white space inside the literal and we don't want
586 -- to stop on that white space.
588 -- Note: since this is an error recovery issue anyway, it is not worth
589 -- worrying about special UTF_32 line terminator characters here.
591 if Prev_Token = Tok_String_Literal then
595 if Source (S1) = C then
597 exit when Source (S1) /= C;
598 elsif Source (S1) in Line_Terminator then
603 -- Character literal also needs special handling
605 elsif Prev_Token = Tok_Char_Literal then
608 -- Otherwise we search forward for the end of the current token, marked
609 -- by a line terminator, white space, a comment symbol or if we bump
610 -- into the following token (i.e. the current token).
612 -- Again, it is not worth worrying about UTF_32 special line terminator
613 -- characters in this context, since this is only for error recovery.
616 while Source (S1) not in Line_Terminator
617 and then Source (S1) /= ' '
618 and then Source (S1) /= ASCII.HT
619 and then (Source (S1) /= '-' or else Source (S1 + 1) /= '-')
620 and then S1 /= Token_Ptr
626 -- S1 is now set to the location for the flag
635 procedure Error_Msg_BC (Msg : String) is
637 -- If we are at end of file, post the flag after the previous token
639 if Token = Tok_EOF then
642 -- If we are at start of file, post the flag at the current token
644 elsif Token_Ptr = Source_First (Current_Source_File) then
647 -- If the character before the current token is a space or a horizontal
648 -- tab, then we place the flag on this character (in the case of a tab
649 -- we would really like to place it in the "last" character of the tab
650 -- space, but that it too much trouble to worry about).
652 elsif Source (Token_Ptr - 1) = ' '
653 or else Source (Token_Ptr - 1) = ASCII.HT
655 Error_Msg (Msg, Token_Ptr - 1);
657 -- If there is no space or tab before the current token, then there is
658 -- no room to place the flag before the token, so we place it on the
659 -- token instead (this happens for example at the start of a line).
662 Error_Msg (Msg, Token_Ptr);
670 procedure Error_Msg_CRT (Feature : String; N : Node_Id) is
671 CNRT : constant String := " not allowed in no run time mode";
672 CCRT : constant String := " not supported by configuration>";
674 S : String (1 .. Feature'Length + 1 + CCRT'Length);
679 S (2 .. Feature'Length + 1) := Feature;
680 L := Feature'Length + 2;
682 if No_Run_Time_Mode then
683 S (L .. L + CNRT'Length - 1) := CNRT;
684 L := L + CNRT'Length - 1;
686 else pragma Assert (Configurable_Run_Time_Mode);
687 S (L .. L + CCRT'Length - 1) := CCRT;
688 L := L + CCRT'Length - 1;
691 Error_Msg_N (S (1 .. L), N);
692 Configurable_Run_Time_Violations := Configurable_Run_Time_Violations + 1;
699 procedure Error_Msg_PT (E : Entity_Id; Iface_Prim : Entity_Id) is
702 ("illegal overriding of subprogram inherited from interface", E);
704 Error_Msg_Sloc := Sloc (Iface_Prim);
706 if Ekind (E) = E_Function then
708 ("\first formal of & declared # must be of mode `IN` "
709 & "or access-to-constant", E);
712 ("\first formal of & declared # must be of mode `OUT`, `IN OUT` "
713 & "or access-to-variable", E);
721 procedure Error_Msg_F (Msg : String; N : Node_Id) is
723 Error_Msg_NEL (Msg, N, N, Sloc (First_Node (N)));
730 procedure Error_Msg_FE
733 E : Node_Or_Entity_Id)
736 Error_Msg_NEL (Msg, N, E, Sloc (First_Node (N)));
739 ------------------------
740 -- Error_Msg_Internal --
741 ------------------------
743 procedure Error_Msg_Internal
749 Next_Msg : Error_Msg_Id;
750 -- Pointer to next message at insertion point
752 Prev_Msg : Error_Msg_Id;
753 -- Pointer to previous message at insertion point
755 Temp_Msg : Error_Msg_Id;
758 -- Set if warning to be treated as error
760 procedure Handle_Serious_Error;
761 -- Internal procedure to do all error message handling for a serious
762 -- error message, other than bumping the error counts and arranging
763 -- for the message to be output.
765 --------------------------
766 -- Handle_Serious_Error --
767 --------------------------
769 procedure Handle_Serious_Error is
771 -- Turn off code generation if not done already
773 if Operating_Mode = Generate_Code then
774 Operating_Mode := Check_Semantics;
775 Expander_Active := False;
778 -- Set the fatal error flag in the unit table unless we are in
779 -- Try_Semantics mode (in which case we set ignored mode if not
780 -- currently set. This stops the semantics from being performed
781 -- if we find a serious error. This is skipped if we are currently
782 -- dealing with the configuration pragma file.
784 if Current_Source_Unit /= No_Unit then
786 U : constant Unit_Number_Type := Get_Source_Unit (Sptr);
788 if Try_Semantics then
789 if Fatal_Error (U) = None then
790 Set_Fatal_Error (U, Error_Ignored);
793 Set_Fatal_Error (U, Error_Detected);
797 end Handle_Serious_Error;
799 -- Start of processing for Error_Msg_Internal
802 if Raise_Exception_On_Error /= 0 then
803 raise Error_Msg_Exception;
806 Continuation := Msg_Cont;
807 Continuation_New_Line := False;
808 Suppress_Message := False;
809 Kill_Message := False;
810 Set_Msg_Text (Msg, Sptr);
812 -- Kill continuation if parent message killed
814 if Continuation and Last_Killed then
818 -- Return without doing anything if message is suppressed
821 and then not All_Errors_Mode
822 and then not Is_Warning_Msg
823 and then not Is_Unconditional_Msg
825 if not Continuation then
832 -- Return without doing anything if message is killed and this is not
833 -- the first error message. The philosophy is that if we get a weird
834 -- error message and we already have had a message, then we hope the
835 -- weird message is a junk cascaded message
838 and then not All_Errors_Mode
839 and then Total_Errors_Detected /= 0
841 if not Continuation then
848 -- Special check for warning message to see if it should be output
850 if Is_Warning_Msg then
852 -- Immediate return if warning message and warnings are suppressed
854 if Warnings_Suppressed (Optr) /= No_String
856 Warnings_Suppressed (Sptr) /= No_String
858 Cur_Msg := No_Error_Msg;
862 -- If the flag location is in the main extended source unit then for
863 -- sure we want the warning since it definitely belongs
865 if In_Extended_Main_Source_Unit (Sptr) then
868 -- If the main unit has not been read yet. the warning must be on
869 -- a configuration file: gnat.adc or user-defined. This means we
870 -- are not parsing the main unit yet, so skip following checks.
872 elsif No (Cunit (Main_Unit)) then
875 -- If the flag location is not in the main extended source unit, then
876 -- we want to eliminate the warning, unless it is in the extended
877 -- main code unit and we want warnings on the instance.
879 elsif In_Extended_Main_Code_Unit (Sptr) and then Warn_On_Instance then
882 -- Keep warning if debug flag G set
884 elsif Debug_Flag_GG then
887 -- Keep warning if message text contains !!
889 elsif Has_Double_Exclam then
892 -- Here is where we delete a warning from a with'ed unit
895 Cur_Msg := No_Error_Msg;
897 if not Continuation then
905 -- If message is to be ignored in special ignore message mode, this is
906 -- where we do this special processing, bypassing message output.
908 if Ignore_Errors_Enable > 0 then
909 if Is_Serious_Error then
910 Handle_Serious_Error;
916 -- If error message line length set, and this is a continuation message
917 -- then all we do is to append the text to the text of the last message
918 -- with a comma space separator (eliminating a possible (style) or
921 if Error_Msg_Line_Length /= 0 and then Continuation then
922 Cur_Msg := Errors.Last;
925 Oldm : String_Ptr := Errors.Table (Cur_Msg).Text;
926 Newm : String (1 .. Oldm'Last + 2 + Msglen);
931 -- First copy old message to new one and free it
933 Newm (Oldm'Range) := Oldm.all;
937 -- Remove (style) or info: at start of message
939 if Msglen > 8 and then Msg_Buffer (1 .. 8) = "(style) " then
942 elsif Msglen > 6 and then Msg_Buffer (1 .. 6) = "info: " then
949 -- Now deal with separation between messages. Normally this is
950 -- simply comma space, but there are some special cases.
952 -- If continuation new line, then put actual NL character in msg
954 if Continuation_New_Line then
956 Newm (Newl) := ASCII.LF;
958 -- If continuation message is enclosed in parentheses, then
959 -- special treatment (don't need a comma, and we want to combine
960 -- successive parenthetical remarks into a single one with
961 -- separating commas).
963 elsif Msg_Buffer (M) = '(' and then Msg_Buffer (Msglen) = ')' then
965 -- Case where existing message ends in right paren, remove
966 -- and separate parenthetical remarks with a comma.
968 if Newm (Newl) = ')' then
970 Msg_Buffer (M) := ' ';
972 -- Case where we are adding new parenthetical comment
979 -- Case where continuation not in parens and no new line
982 Newm (Newl + 1 .. Newl + 2) := ", ";
986 -- Append new message
988 Newm (Newl + 1 .. Newl + Msglen - M + 1) :=
989 Msg_Buffer (M .. Msglen);
990 Newl := Newl + Msglen - M + 1;
991 Errors.Table (Cur_Msg).Text := new String'(Newm (1 .. Newl));
993 -- Update warning msg flag and message doc char if needed
995 if Is_Warning_Msg then
996 if not Errors.Table (Cur_Msg).Warn then
997 Errors.Table (Cur_Msg).Warn := True;
998 Errors.Table (Cur_Msg).Warn_Chr := Warning_Msg_Char;
1000 elsif Warning_Msg_Char /= ' ' then
1001 Errors.Table (Cur_Msg).Warn_Chr := Warning_Msg_Char;
1009 -- Here we build a new error object
1012 ((Text => new String'(Msg_Buffer (1 .. Msglen)),
1013 Next => No_Error_Msg,
1014 Prev => No_Error_Msg,
1017 Sfile => Get_Source_File_Index (Sptr),
1018 Line => Get_Physical_Line_Number (Sptr),
1019 Col => Get_Column_Number (Sptr),
1020 Warn => Is_Warning_Msg,
1021 Info => Is_Info_Msg,
1022 Check => Is_Check_Msg,
1023 Warn_Err => False, -- reset below
1024 Warn_Chr => Warning_Msg_Char,
1025 Style => Is_Style_Msg,
1026 Serious => Is_Serious_Error,
1027 Uncond => Is_Unconditional_Msg,
1028 Msg_Cont => Continuation,
1030 Cur_Msg := Errors.Last;
1032 -- Test if warning to be treated as error
1036 and then (Warning_Treated_As_Error (Msg_Buffer (1 .. Msglen))
1038 Warning_Treated_As_Error (Get_Warning_Tag (Cur_Msg)));
1040 -- Propagate Warn_Err to this message and preceding continuations
1042 for J in reverse 1 .. Errors.Last loop
1043 Errors.Table (J).Warn_Err := Warn_Err;
1044 exit when not Errors.Table (J).Msg_Cont;
1047 -- If immediate errors mode set, output error message now. Also output
1048 -- now if the -d1 debug flag is set (so node number message comes out
1049 -- just before actual error message)
1051 if Debug_Flag_OO or else Debug_Flag_1 then
1054 (Errors.Table (Cur_Msg).Line, Errors.Table (Cur_Msg).Sfile, True);
1055 Temp_Msg := Cur_Msg;
1056 Output_Error_Msgs (Temp_Msg);
1058 -- If not in immediate errors mode, then we insert the message in the
1059 -- error chain for later output by Finalize. The messages are sorted
1060 -- first by unit (main unit comes first), and within a unit by source
1061 -- location (earlier flag location first in the chain).
1064 -- First a quick check, does this belong at the very end of the chain
1065 -- of error messages. This saves a lot of time in the normal case if
1066 -- there are lots of messages.
1068 if Last_Error_Msg /= No_Error_Msg
1069 and then Errors.Table (Cur_Msg).Sfile =
1070 Errors.Table (Last_Error_Msg).Sfile
1071 and then (Sptr > Errors.Table (Last_Error_Msg).Sptr
1073 (Sptr = Errors.Table (Last_Error_Msg).Sptr
1075 Optr > Errors.Table (Last_Error_Msg).Optr))
1077 Prev_Msg := Last_Error_Msg;
1078 Next_Msg := No_Error_Msg;
1080 -- Otherwise do a full sequential search for the insertion point
1083 Prev_Msg := No_Error_Msg;
1084 Next_Msg := First_Error_Msg;
1085 while Next_Msg /= No_Error_Msg loop
1087 Errors.Table (Cur_Msg).Sfile < Errors.Table (Next_Msg).Sfile;
1089 if Errors.Table (Cur_Msg).Sfile = Errors.Table (Next_Msg).Sfile
1091 exit when Sptr < Errors.Table (Next_Msg).Sptr
1092 or else (Sptr = Errors.Table (Next_Msg).Sptr
1093 and then Optr < Errors.Table (Next_Msg).Optr);
1096 Prev_Msg := Next_Msg;
1097 Next_Msg := Errors.Table (Next_Msg).Next;
1101 -- Now we insert the new message in the error chain.
1103 -- The possible insertion point for the new message is after Prev_Msg
1104 -- and before Next_Msg. However, this is where we do a special check
1105 -- for redundant parsing messages, defined as messages posted on the
1106 -- same line. The idea here is that probably such messages are junk
1107 -- from the parser recovering. In full errors mode, we don't do this
1108 -- deletion, but otherwise such messages are discarded at this stage.
1110 if Prev_Msg /= No_Error_Msg
1111 and then Errors.Table (Prev_Msg).Line =
1112 Errors.Table (Cur_Msg).Line
1113 and then Errors.Table (Prev_Msg).Sfile =
1114 Errors.Table (Cur_Msg).Sfile
1115 and then Compiler_State = Parsing
1116 and then not All_Errors_Mode
1118 -- Don't delete unconditional messages and at this stage, don't
1119 -- delete continuation lines; we attempted to delete those earlier
1120 -- if the parent message was deleted.
1122 if not Errors.Table (Cur_Msg).Uncond
1123 and then not Continuation
1125 -- Don't delete if prev msg is warning and new msg is an error.
1126 -- This is because we don't want a real error masked by a
1127 -- warning. In all other cases (that is parse errors for the
1128 -- same line that are not unconditional) we do delete the
1129 -- message. This helps to avoid junk extra messages from
1130 -- cascaded parsing errors
1132 if not (Errors.Table (Prev_Msg).Warn
1134 Errors.Table (Prev_Msg).Style)
1136 (Errors.Table (Cur_Msg).Warn
1138 Errors.Table (Cur_Msg).Style)
1140 -- All tests passed, delete the message by simply returning
1141 -- without any further processing.
1143 pragma Assert (not Continuation);
1145 Last_Killed := True;
1151 -- Come here if message is to be inserted in the error chain
1153 if not Continuation then
1154 Last_Killed := False;
1157 if Prev_Msg = No_Error_Msg then
1158 First_Error_Msg := Cur_Msg;
1160 Errors.Table (Prev_Msg).Next := Cur_Msg;
1163 Errors.Table (Cur_Msg).Next := Next_Msg;
1165 if Next_Msg = No_Error_Msg then
1166 Last_Error_Msg := Cur_Msg;
1170 -- Bump appropriate statistics counts
1172 if Errors.Table (Cur_Msg).Info then
1173 Info_Messages := Info_Messages + 1;
1175 -- Could be (usually is) both "info" and "warning"
1177 if Errors.Table (Cur_Msg).Warn then
1178 Warnings_Detected := Warnings_Detected + 1;
1181 elsif Errors.Table (Cur_Msg).Warn
1182 or else Errors.Table (Cur_Msg).Style
1184 Warnings_Detected := Warnings_Detected + 1;
1186 elsif Errors.Table (Cur_Msg).Check then
1187 Check_Messages := Check_Messages + 1;
1190 Total_Errors_Detected := Total_Errors_Detected + 1;
1192 if Errors.Table (Cur_Msg).Serious then
1193 Serious_Errors_Detected := Serious_Errors_Detected + 1;
1194 Handle_Serious_Error;
1196 -- If not serious error, set Fatal_Error to indicate ignored error
1200 U : constant Unit_Number_Type := Get_Source_Unit (Sptr);
1202 if Fatal_Error (U) = None then
1203 Set_Fatal_Error (U, Error_Ignored);
1209 -- Record warning message issued
1211 if Errors.Table (Cur_Msg).Warn
1212 and then not Errors.Table (Cur_Msg).Msg_Cont
1214 Warning_Msg := Cur_Msg;
1217 -- If too many warnings turn off warnings
1219 if Maximum_Messages /= 0 then
1220 if Warnings_Detected = Maximum_Messages then
1221 Warning_Mode := Suppress;
1224 -- If too many errors abandon compilation
1226 if Total_Errors_Detected = Maximum_Messages then
1227 raise Unrecoverable_Error;
1230 end Error_Msg_Internal;
1236 procedure Error_Msg_N (Msg : String; N : Node_Or_Entity_Id) is
1238 Error_Msg_NEL (Msg, N, N, Sloc (N));
1245 procedure Error_Msg_NE
1247 N : Node_Or_Entity_Id;
1248 E : Node_Or_Entity_Id)
1251 Error_Msg_NEL (Msg, N, E, Sloc (N));
1258 procedure Error_Msg_NEL
1260 N : Node_Or_Entity_Id;
1261 E : Node_Or_Entity_Id;
1262 Flag_Location : Source_Ptr)
1265 if Special_Msg_Delete (Msg, N, E) then
1269 Prescan_Message (Msg);
1271 -- Special handling for warning messages
1273 if Is_Warning_Msg then
1275 -- Suppress if no warnings set for either entity or node
1277 if No_Warnings (N) or else No_Warnings (E) then
1279 -- Disable any continuation messages as well
1281 Last_Killed := True;
1285 -- Suppress if inside loop that is known to be null or is probably
1286 -- null (case where loop executes only if invalid values present).
1287 -- In either case warnings in the loop are likely to be junk.
1294 while Present (P) loop
1295 if Nkind (P) = N_Loop_Statement
1296 and then Suppress_Loop_Warnings (P)
1306 -- Test for message to be output
1309 or else Is_Unconditional_Msg
1310 or else Is_Warning_Msg
1312 or else (Msg (Msg'First) = '\' and then not Last_Killed)
1315 Error_Msg_Node_1 := E;
1316 Error_Msg (Msg, Flag_Location);
1319 Last_Killed := True;
1329 procedure Error_Msg_NW
1332 N : Node_Or_Entity_Id)
1336 and then In_Extended_Main_Source_Unit (N)
1337 and then Comes_From_Source (N)
1339 Error_Msg_NEL (Msg, N, N, Sloc (N));
1347 procedure Error_Msg_S (Msg : String) is
1349 Error_Msg (Msg, Scan_Ptr);
1356 procedure Error_Msg_SC (Msg : String) is
1358 -- If we are at end of file, post the flag after the previous token
1360 if Token = Tok_EOF then
1363 -- For all other cases the message is posted at the current token
1367 Error_Msg (Msg, Token_Ptr);
1375 procedure Error_Msg_SP (Msg : String) is
1377 -- Note: in the case where there is no previous token, Prev_Token_Ptr
1378 -- is set to Source_First, which is a reasonable position for the
1379 -- error flag in this situation
1381 Error_Msg (Msg, Prev_Token_Ptr);
1388 procedure Finalize (Last_Call : Boolean) is
1393 procedure Delete_Warning (E : Error_Msg_Id);
1394 -- Delete a warning msg if not already deleted and adjust warning count
1396 --------------------
1397 -- Delete_Warning --
1398 --------------------
1400 procedure Delete_Warning (E : Error_Msg_Id) is
1402 if not Errors.Table (E).Deleted then
1403 Errors.Table (E).Deleted := True;
1404 Warnings_Detected := Warnings_Detected - 1;
1406 if Errors.Table (E).Info then
1407 Info_Messages := Info_Messages - 1;
1410 if Errors.Table (E).Warn_Err then
1411 Warnings_Treated_As_Errors := Warnings_Treated_As_Errors - 1;
1416 -- Start of processing for Finalize
1419 -- Set Prev pointers
1421 Cur := First_Error_Msg;
1422 while Cur /= No_Error_Msg loop
1423 Nxt := Errors.Table (Cur).Next;
1424 exit when Nxt = No_Error_Msg;
1425 Errors.Table (Nxt).Prev := Cur;
1429 -- Eliminate any duplicated error messages from the list. This is
1430 -- done after the fact to avoid problems with Change_Error_Text.
1432 Cur := First_Error_Msg;
1433 while Cur /= No_Error_Msg loop
1434 Nxt := Errors.Table (Cur).Next;
1437 while F /= No_Error_Msg
1438 and then Errors.Table (F).Sptr = Errors.Table (Cur).Sptr
1440 Check_Duplicate_Message (Cur, F);
1441 F := Errors.Table (F).Next;
1447 -- Mark any messages suppressed by specific warnings as Deleted
1449 Cur := First_Error_Msg;
1450 while Cur /= No_Error_Msg loop
1452 CE : Error_Msg_Object renames Errors.Table (Cur);
1453 Tag : constant String := Get_Warning_Tag (Cur);
1456 if (CE.Warn and not CE.Deleted)
1458 (Warning_Specifically_Suppressed (CE.Sptr, CE.Text, Tag) /=
1461 Warning_Specifically_Suppressed (CE.Optr, CE.Text, Tag) /=
1464 Delete_Warning (Cur);
1466 -- If this is a continuation, delete previous parts of message
1469 while Errors.Table (F).Msg_Cont loop
1470 F := Errors.Table (F).Prev;
1471 exit when F = No_Error_Msg;
1475 -- Delete any following continuations
1479 F := Errors.Table (F).Next;
1480 exit when F = No_Error_Msg;
1481 exit when not Errors.Table (F).Msg_Cont;
1487 Cur := Errors.Table (Cur).Next;
1490 Finalize_Called := True;
1492 -- Check consistency of specific warnings (may add warnings). We only
1493 -- do this on the last call, after all possible warnings are posted.
1496 Validate_Specific_Warnings (Error_Msg'Access);
1504 function First_Node (C : Node_Id) return Node_Id is
1505 Orig : constant Node_Id := Original_Node (C);
1506 Loc : constant Source_Ptr := Sloc (Orig);
1507 Sfile : constant Source_File_Index := Get_Source_File_Index (Loc);
1511 function Test_Earlier (N : Node_Id) return Traverse_Result;
1512 -- Function applied to every node in the construct
1514 procedure Search_Tree_First is new Traverse_Proc (Test_Earlier);
1515 -- Create traversal procedure
1521 function Test_Earlier (N : Node_Id) return Traverse_Result is
1522 Norig : constant Node_Id := Original_Node (N);
1523 Loc : constant Source_Ptr := Sloc (Norig);
1526 -- Check for earlier
1530 -- Ignore nodes with no useful location information
1532 and then Loc /= Standard_Location
1533 and then Loc /= No_Location
1535 -- Ignore nodes from a different file. This ensures against cases
1536 -- of strange foreign code somehow being present. We don't want
1537 -- wild placement of messages if that happens.
1539 and then Get_Source_File_Index (Loc) = Sfile
1548 -- Start of processing for First_Node
1551 if Nkind (Orig) in N_Subexpr then
1554 Search_Tree_First (Orig);
1566 function First_Sloc (N : Node_Id) return Source_Ptr is
1567 SI : constant Source_File_Index := Source_Index (Get_Source_Unit (N));
1568 SF : constant Source_Ptr := Source_First (SI);
1573 F := First_Node (N);
1576 -- The following circuit is a bit subtle. When we have parenthesized
1577 -- expressions, then the Sloc will not record the location of the paren,
1578 -- but we would like to post the flag on the paren. So what we do is to
1579 -- crawl up the tree from the First_Node, adjusting the Sloc value for
1580 -- any parentheses we know are present. Yes, we know this circuit is not
1581 -- 100% reliable (e.g. because we don't record all possible paren level
1582 -- values), but this is only for an error message so it is good enough.
1585 Paren_Loop : for J in 1 .. Paren_Count (F) loop
1587 -- We don't look more than 12 characters behind the current
1588 -- location, and in any case not past the front of the source.
1590 Search_Loop : for K in 1 .. 12 loop
1591 exit Search_Loop when S = SF;
1593 if Source_Text (SI) (S - 1) = '(' then
1597 elsif Source_Text (SI) (S - 1) <= ' ' then
1603 end loop Search_Loop;
1604 end loop Paren_Loop;
1606 exit Node_Loop when F = N;
1608 exit Node_Loop when Nkind (F) not in N_Subexpr;
1614 -----------------------
1615 -- Get_Ignore_Errors --
1616 -----------------------
1618 function Get_Ignore_Errors return Boolean is
1620 return Errors_Must_Be_Ignored;
1621 end Get_Ignore_Errors;
1627 procedure Initialize is
1630 First_Error_Msg := No_Error_Msg;
1631 Last_Error_Msg := No_Error_Msg;
1632 Serious_Errors_Detected := 0;
1633 Total_Errors_Detected := 0;
1634 Cur_Msg := No_Error_Msg;
1637 -- Reset counts for warnings
1641 -- Initialize warnings tables
1644 Specific_Warnings.Init;
1651 function No_Warnings (N : Node_Or_Entity_Id) return Boolean is
1653 if Error_Posted (N) then
1656 elsif Nkind (N) in N_Entity and then Has_Warnings_Off (N) then
1659 elsif Is_Entity_Name (N)
1660 and then Present (Entity (N))
1661 and then Has_Warnings_Off (Entity (N))
1674 function OK_Node (N : Node_Id) return Boolean is
1675 K : constant Node_Kind := Nkind (N);
1678 if Error_Posted (N) then
1681 elsif K in N_Has_Etype
1682 and then Present (Etype (N))
1683 and then Error_Posted (Etype (N))
1688 or else K = N_Attribute_Reference
1689 or else K = N_Character_Literal
1690 or else K = N_Expanded_Name
1691 or else K = N_Identifier
1692 or else K = N_Operator_Symbol)
1693 and then Present (Entity (N))
1694 and then Error_Posted (Entity (N))
1702 ---------------------
1703 -- Output_Messages --
1704 ---------------------
1706 procedure Output_Messages is
1710 procedure Write_Error_Summary;
1711 -- Write error summary
1713 procedure Write_Header (Sfile : Source_File_Index);
1714 -- Write header line (compiling or checking given file)
1716 procedure Write_Max_Errors;
1717 -- Write message if max errors reached
1719 -------------------------
1720 -- Write_Error_Summary --
1721 -------------------------
1723 procedure Write_Error_Summary is
1725 -- Extra blank line if error messages or source listing were output
1727 if Total_Errors_Detected + Warnings_Detected > 0 or else Full_List
1732 -- Message giving number of lines read and number of errors detected.
1733 -- This normally goes to Standard_Output. The exception is when brief
1734 -- mode is not set, verbose mode (or full list mode) is set, and
1735 -- there are errors. In this case we send the message to standard
1736 -- error to make sure that *something* appears on standard error
1737 -- in an error situation.
1739 if Total_Errors_Detected + Warnings_Detected /= 0
1740 and then not Brief_Output
1741 and then (Verbose_Mode or Full_List)
1746 -- Message giving total number of lines. Don't give this message if
1747 -- the Main_Source line is unknown (this happens in error situations,
1748 -- e.g. when integrated preprocessing fails).
1750 if Main_Source_File /= No_Source_File then
1752 Write_Int (Num_Source_Lines (Main_Source_File));
1754 if Num_Source_Lines (Main_Source_File) = 1 then
1755 Write_Str (" line: ");
1757 Write_Str (" lines: ");
1761 if Total_Errors_Detected = 0 then
1762 Write_Str ("No errors");
1764 elsif Total_Errors_Detected = 1 then
1765 Write_Str ("1 error");
1768 Write_Int (Total_Errors_Detected);
1769 Write_Str (" errors");
1772 if Warnings_Detected - Info_Messages /= 0 then
1774 Write_Int (Warnings_Detected);
1775 Write_Str (" warning");
1777 if Warnings_Detected - Info_Messages /= 1 then
1781 if Warning_Mode = Treat_As_Error then
1782 Write_Str (" (treated as error");
1784 if Warnings_Detected /= 1 then
1790 elsif Warnings_Treated_As_Errors /= 0 then
1792 Write_Int (Warnings_Treated_As_Errors);
1793 Write_Str (" treated as errors)");
1797 if Info_Messages /= 0 then
1799 Write_Int (Info_Messages);
1800 Write_Str (" info message");
1802 if Info_Messages > 1 then
1808 Set_Standard_Output;
1809 end Write_Error_Summary;
1815 procedure Write_Header (Sfile : Source_File_Index) is
1817 if Verbose_Mode or Full_List then
1818 if Original_Operating_Mode = Generate_Code then
1819 Write_Str ("Compiling: ");
1821 Write_Str ("Checking: ");
1824 Write_Name (Full_File_Name (Sfile));
1826 if not Debug_Flag_7 then
1828 Write_Str ("Source file time stamp: ");
1829 Write_Time_Stamp (Sfile);
1831 Write_Str ("Compiled at: " & Compilation_Time);
1838 ----------------------
1839 -- Write_Max_Errors --
1840 ----------------------
1842 procedure Write_Max_Errors is
1844 if Maximum_Messages /= 0 then
1845 if Warnings_Detected >= Maximum_Messages then
1847 Write_Line ("maximum number of warnings output");
1848 Write_Line ("any further warnings suppressed");
1849 Set_Standard_Output;
1852 -- If too many errors print message
1854 if Total_Errors_Detected >= Maximum_Messages then
1856 Write_Line ("fatal error: maximum number of errors detected");
1857 Set_Standard_Output;
1860 end Write_Max_Errors;
1862 -- Start of processing for Output_Messages
1865 -- Error if Finalize has not been called
1867 if not Finalize_Called then
1868 raise Program_Error;
1871 -- Reset current error source file if the main unit has a pragma
1872 -- Source_Reference. This ensures outputting the proper name of
1873 -- the source file in this situation.
1875 if Main_Source_File = No_Source_File
1876 or else Num_SRef_Pragmas (Main_Source_File) /= 0
1878 Current_Error_Source_File := No_Source_File;
1883 if Brief_Output or (not Full_List and not Verbose_Mode) then
1886 E := First_Error_Msg;
1887 while E /= No_Error_Msg loop
1888 if not Errors.Table (E).Deleted and then not Debug_Flag_KK then
1889 if Full_Path_Name_For_Brief_Errors then
1890 Write_Name (Full_Ref_Name (Errors.Table (E).Sfile));
1892 Write_Name (Reference_Name (Errors.Table (E).Sfile));
1896 Write_Int (Int (Physical_To_Logical
1897 (Errors.Table (E).Line,
1898 Errors.Table (E).Sfile)));
1901 if Errors.Table (E).Col < 10 then
1905 Write_Int (Int (Errors.Table (E).Col));
1907 Output_Msg_Text (E);
1911 E := Errors.Table (E).Next;
1914 Set_Standard_Output;
1917 -- Full source listing case
1920 List_Pragmas_Index := 1;
1921 List_Pragmas_Mode := True;
1922 E := First_Error_Msg;
1924 -- Normal case, to stdout (copyright notice already output)
1926 if Full_List_File_Name = null then
1927 if not Debug_Flag_7 then
1934 Create_List_File_Access.all (Full_List_File_Name.all);
1935 Set_Special_Output (Write_List_Info_Access.all'Access);
1937 -- Write copyright notice to file
1939 if not Debug_Flag_7 then
1940 Write_Str ("GNAT ");
1941 Write_Str (Gnat_Version_String);
1943 Write_Str ("Copyright 1992-" &
1945 ", Free Software Foundation, Inc.");
1950 -- First list extended main source file units with errors
1952 for U in Main_Unit .. Last_Unit loop
1953 if In_Extended_Main_Source_Unit (Cunit_Entity (U))
1955 -- If debug flag d.m is set, only the main source is listed
1957 and then (U = Main_Unit or else not Debug_Flag_Dot_M)
1959 -- If the unit of the entity does not come from source, it is
1960 -- an implicit subprogram declaration for a child subprogram.
1961 -- Do not emit errors for it, they are listed with the body.
1964 (No (Cunit_Entity (U))
1965 or else Comes_From_Source (Cunit_Entity (U))
1966 or else not Is_Subprogram (Cunit_Entity (U)))
1968 -- If the compilation unit associated with this unit does not
1969 -- come from source, it means it is an instantiation that should
1970 -- not be included in the source listing.
1972 and then Comes_From_Source (Cunit (U))
1975 Sfile : constant Source_File_Index := Source_Index (U);
1980 -- Only write the header if Sfile is known
1982 if Sfile /= No_Source_File then
1983 Write_Header (Sfile);
1987 -- Normally, we don't want an "error messages from file"
1988 -- message when listing the entire file, so we set the
1989 -- current source file as the current error source file.
1990 -- However, the old style of doing things was to list this
1991 -- message if pragma Source_Reference is present, even for
1992 -- the main unit. Since the purpose of the -gnatd.m switch
1993 -- is to duplicate the old behavior, we skip the reset if
1994 -- this debug flag is set.
1996 if not Debug_Flag_Dot_M then
1997 Current_Error_Source_File := Sfile;
2000 -- Only output the listing if Sfile is known, to avoid
2001 -- crashing the compiler.
2003 if Sfile /= No_Source_File then
2004 for N in 1 .. Last_Source_Line (Sfile) loop
2005 while E /= No_Error_Msg
2006 and then Errors.Table (E).Deleted
2008 E := Errors.Table (E).Next;
2013 and then Errors.Table (E).Line = N
2014 and then Errors.Table (E).Sfile = Sfile;
2016 Output_Source_Line (N, Sfile, Err_Flag);
2019 Output_Error_Msgs (E);
2021 if not Debug_Flag_2 then
2031 -- Then output errors, if any, for subsidiary units not in the
2032 -- main extended unit.
2034 -- Note: if debug flag d.m set, include errors for any units other
2035 -- than the main unit in the extended source unit (e.g. spec and
2036 -- subunits for a body).
2038 while E /= No_Error_Msg
2039 and then (not In_Extended_Main_Source_Unit (Errors.Table (E).Sptr)
2042 and then Get_Source_Unit
2043 (Errors.Table (E).Sptr) /= Main_Unit))
2045 if Errors.Table (E).Deleted then
2046 E := Errors.Table (E).Next;
2051 (Errors.Table (E).Line, Errors.Table (E).Sfile, True);
2052 Output_Error_Msgs (E);
2056 -- If output to file, write extra copy of error summary to the
2057 -- output file, and then close it.
2059 if Full_List_File_Name /= null then
2060 Write_Error_Summary;
2062 Close_List_File_Access.all;
2063 Cancel_Special_Output;
2067 -- Verbose mode (error lines only with error flags). Normally this is
2068 -- ignored in full list mode, unless we are listing to a file, in which
2069 -- case we still generate -gnatv output to standard output.
2072 and then (not Full_List or else Full_List_File_Name /= null)
2076 -- Output the header only when Main_Source_File is known
2078 if Main_Source_File /= No_Source_File then
2079 Write_Header (Main_Source_File);
2082 E := First_Error_Msg;
2084 -- Loop through error lines
2086 while E /= No_Error_Msg loop
2087 if Errors.Table (E).Deleted then
2088 E := Errors.Table (E).Next;
2092 (Errors.Table (E).Line, Errors.Table (E).Sfile, True);
2093 Output_Error_Msgs (E);
2098 -- Output error summary if verbose or full list mode
2100 if Verbose_Mode or else Full_List then
2101 Write_Error_Summary;
2106 if Warning_Mode = Treat_As_Error then
2107 Total_Errors_Detected :=
2108 Total_Errors_Detected + Warnings_Detected - Info_Messages;
2109 Warnings_Detected := Info_Messages;
2111 end Output_Messages;
2113 ------------------------
2114 -- Output_Source_Line --
2115 ------------------------
2117 procedure Output_Source_Line
2118 (L : Physical_Line_Number;
2119 Sfile : Source_File_Index;
2125 Line_Number_Output : Boolean := False;
2126 -- Set True once line number is output
2128 Empty_Line : Boolean := True;
2129 -- Set False if line includes at least one character
2132 if Sfile /= Current_Error_Source_File then
2133 Write_Str ("==============Error messages for ");
2135 case Sinput.File_Type (Sfile) is
2137 Write_Str ("source");
2139 when Sinput.Config =>
2140 Write_Str ("configuration pragmas");
2143 Write_Str ("symbol definition");
2145 when Sinput.Preproc =>
2146 Write_Str ("preprocessing data");
2149 Write_Str (" file: ");
2150 Write_Name (Full_File_Name (Sfile));
2153 if Num_SRef_Pragmas (Sfile) > 0 then
2154 Write_Str ("--------------Line numbers from file: ");
2155 Write_Name (Full_Ref_Name (Sfile));
2156 Write_Str (" (starting at line ");
2157 Write_Int (Int (First_Mapped_Line (Sfile)));
2162 Current_Error_Source_File := Sfile;
2165 if Errs or List_Pragmas_Mode then
2166 Output_Line_Number (Physical_To_Logical (L, Sfile));
2167 Line_Number_Output := True;
2170 S := Line_Start (L, Sfile);
2173 C := Source_Text (Sfile) (S);
2174 exit when C = ASCII.LF or else C = ASCII.CR or else C = EOF;
2176 -- Deal with matching entry in List_Pragmas table
2179 and then List_Pragmas_Index <= List_Pragmas.Last
2180 and then S = List_Pragmas.Table (List_Pragmas_Index).Ploc
2182 case List_Pragmas.Table (List_Pragmas_Index).Ptyp is
2186 -- Ignore if on line with errors so that error flags
2187 -- get properly listed with the error line .
2190 Write_Char (ASCII.FF);
2194 List_Pragmas_Mode := True;
2196 if not Line_Number_Output then
2197 Output_Line_Number (Physical_To_Logical (L, Sfile));
2198 Line_Number_Output := True;
2205 List_Pragmas_Mode := False;
2208 List_Pragmas_Index := List_Pragmas_Index + 1;
2210 -- Normal case (no matching entry in List_Pragmas table)
2213 if Errs or List_Pragmas_Mode then
2218 Empty_Line := False;
2222 -- If we have output a source line, then add the line terminator, with
2223 -- training spaces preserved (so we output the line exactly as input).
2225 if Line_Number_Output then
2229 Write_Eol_Keep_Blanks;
2232 end Output_Source_Line;
2234 -----------------------------
2235 -- Remove_Warning_Messages --
2236 -----------------------------
2238 procedure Remove_Warning_Messages (N : Node_Id) is
2240 function Check_For_Warning (N : Node_Id) return Traverse_Result;
2241 -- This function checks one node for a possible warning message
2243 function Check_All_Warnings is new Traverse_Func (Check_For_Warning);
2244 -- This defines the traversal operation
2246 -----------------------
2247 -- Check_For_Warning --
2248 -----------------------
2250 function Check_For_Warning (N : Node_Id) return Traverse_Result is
2251 Loc : constant Source_Ptr := Sloc (N);
2254 function To_Be_Removed (E : Error_Msg_Id) return Boolean;
2255 -- Returns True for a message that is to be removed. Also adjusts
2256 -- warning count appropriately.
2262 function To_Be_Removed (E : Error_Msg_Id) return Boolean is
2264 if E /= No_Error_Msg
2266 -- Don't remove if location does not match
2268 and then Errors.Table (E).Optr = Loc
2270 -- Don't remove if not warning/info message. Note that we do
2271 -- not remove style messages here. They are warning messages
2272 -- but not ones we want removed in this context.
2274 and then Errors.Table (E).Warn
2276 -- Don't remove unconditional messages
2278 and then not Errors.Table (E).Uncond
2280 Warnings_Detected := Warnings_Detected - 1;
2282 if Errors.Table (E).Info then
2283 Info_Messages := Info_Messages - 1;
2288 -- No removal required
2295 -- Start of processing for Check_For_Warnings
2298 while To_Be_Removed (First_Error_Msg) loop
2299 First_Error_Msg := Errors.Table (First_Error_Msg).Next;
2302 if First_Error_Msg = No_Error_Msg then
2303 Last_Error_Msg := No_Error_Msg;
2306 E := First_Error_Msg;
2307 while E /= No_Error_Msg loop
2308 while To_Be_Removed (Errors.Table (E).Next) loop
2309 Errors.Table (E).Next :=
2310 Errors.Table (Errors.Table (E).Next).Next;
2312 if Errors.Table (E).Next = No_Error_Msg then
2313 Last_Error_Msg := E;
2317 E := Errors.Table (E).Next;
2320 if Nkind (N) = N_Raise_Constraint_Error
2321 and then Original_Node (N) /= N
2322 and then No (Condition (N))
2324 -- Warnings may have been posted on subexpressions of the original
2325 -- tree. We place the original node back on the tree to remove
2326 -- those warnings, whose sloc do not match those of any node in
2327 -- the current tree. Given that we are in unreachable code, this
2328 -- modification to the tree is harmless.
2331 Status : Traverse_Final_Result;
2334 if Is_List_Member (N) then
2335 Set_Condition (N, Original_Node (N));
2336 Status := Check_All_Warnings (Condition (N));
2338 Rewrite (N, Original_Node (N));
2339 Status := Check_All_Warnings (N);
2348 end Check_For_Warning;
2350 -- Start of processing for Remove_Warning_Messages
2353 if Warnings_Detected /= 0 then
2355 Discard : Traverse_Final_Result;
2356 pragma Warnings (Off, Discard);
2359 Discard := Check_All_Warnings (N);
2362 end Remove_Warning_Messages;
2364 procedure Remove_Warning_Messages (L : List_Id) is
2367 if Is_Non_Empty_List (L) then
2369 while Present (Stat) loop
2370 Remove_Warning_Messages (Stat);
2374 end Remove_Warning_Messages;
2376 --------------------
2377 -- Reset_Warnings --
2378 --------------------
2380 procedure Reset_Warnings is
2382 Warnings_Treated_As_Errors := 0;
2383 Warnings_Detected := 0;
2385 Warnings_As_Errors_Count := 0;
2388 ----------------------
2389 -- Adjust_Name_Case --
2390 ----------------------
2392 procedure Adjust_Name_Case
2393 (Buf : in out Bounded_String;
2397 -- We have an all lower case name from Namet, and now we want to set
2398 -- the appropriate case. If possible we copy the actual casing from
2399 -- the source. If not we use standard identifier casing.
2402 Src_Ind : constant Source_File_Index := Get_Source_File_Index (Loc);
2403 Sbuffer : Source_Buffer_Ptr;
2405 Src_Ptr : Source_Ptr;
2411 -- For standard locations, always use mixed case
2413 if Loc <= No_Location then
2414 Set_Casing (Mixed_Case);
2417 -- Determine if the reference we are dealing with corresponds to
2418 -- text at the point of the error reference. This will often be
2419 -- the case for simple identifier references, and is the case
2420 -- where we can copy the casing from the source.
2422 Sbuffer := Source_Text (Src_Ind);
2424 while Ref_Ptr <= Buf.Length loop
2426 Fold_Lower (Sbuffer (Src_Ptr)) /=
2427 Fold_Lower (Buf.Chars (Ref_Ptr));
2428 Ref_Ptr := Ref_Ptr + 1;
2429 Src_Ptr := Src_Ptr + 1;
2432 -- If we get through the loop without a mismatch, then output the
2433 -- name the way it is cased in the source program
2435 if Ref_Ptr > Buf.Length then
2438 for J in 1 .. Buf.Length loop
2439 Buf.Chars (J) := Sbuffer (Src_Ptr);
2440 Src_Ptr := Src_Ptr + 1;
2443 -- Otherwise set the casing using the default identifier casing
2446 Set_Casing (Buf, Identifier_Casing (Src_Ind));
2450 end Adjust_Name_Case;
2452 procedure Adjust_Name_Case (Loc : Source_Ptr) is
2454 Adjust_Name_Case (Global_Name_Buffer, Loc);
2455 end Adjust_Name_Case;
2457 ---------------------------
2458 -- Set_Identifier_Casing --
2459 ---------------------------
2461 procedure Set_Identifier_Casing
2462 (Identifier_Name : System.Address;
2463 File_Name : System.Address)
2465 Ident : constant Big_String_Ptr := To_Big_String_Ptr (Identifier_Name);
2466 File : constant Big_String_Ptr := To_Big_String_Ptr (File_Name);
2469 Desired_Case : Casing_Type := Mixed_Case;
2470 -- Casing required for result. Default value of Mixed_Case is used if
2471 -- for some reason we cannot find the right file name in the table.
2474 -- Get length of file name
2477 while File (Flen + 1) /= ASCII.NUL loop
2481 -- Loop through file names to find matching one. This is a bit slow, but
2482 -- we only do it in error situations so it is not so terrible. Note that
2483 -- if the loop does not exit, then the desired case will be left set to
2484 -- Mixed_Case, this can happen if the name was not in canonical form.
2486 for J in 1 .. Last_Source_File loop
2487 Get_Name_String (Full_Debug_Name (J));
2490 and then Name_Buffer (1 .. Name_Len) = String (File (1 .. Flen))
2492 Desired_Case := Identifier_Casing (J);
2497 -- Copy identifier as given to Name_Buffer
2499 for J in Name_Buffer'Range loop
2500 Name_Buffer (J) := Ident (J);
2502 if Name_Buffer (J) = ASCII.NUL then
2508 Set_Casing (Desired_Case);
2509 end Set_Identifier_Casing;
2511 -----------------------
2512 -- Set_Ignore_Errors --
2513 -----------------------
2515 procedure Set_Ignore_Errors (To : Boolean) is
2517 Errors_Must_Be_Ignored := To;
2518 end Set_Ignore_Errors;
2520 ------------------------------
2521 -- Set_Msg_Insertion_Column --
2522 ------------------------------
2524 procedure Set_Msg_Insertion_Column is
2526 if RM_Column_Check then
2527 Set_Msg_Str (" in column ");
2528 Set_Msg_Int (Int (Error_Msg_Col) + 1);
2530 end Set_Msg_Insertion_Column;
2532 ----------------------------
2533 -- Set_Msg_Insertion_Node --
2534 ----------------------------
2536 procedure Set_Msg_Insertion_Node is
2541 Error_Msg_Node_1 = Error
2542 or else Error_Msg_Node_1 = Any_Type;
2544 if Error_Msg_Node_1 = Empty then
2545 Set_Msg_Blank_Conditional;
2546 Set_Msg_Str ("<empty>");
2548 elsif Error_Msg_Node_1 = Error then
2550 Set_Msg_Str ("<error>");
2552 elsif Error_Msg_Node_1 = Standard_Void_Type then
2554 Set_Msg_Str ("procedure name");
2556 elsif Nkind (Error_Msg_Node_1) in N_Entity
2557 and then Ekind (Error_Msg_Node_1) = E_Anonymous_Access_Subprogram_Type
2560 Set_Msg_Str ("access to subprogram");
2563 Set_Msg_Blank_Conditional;
2567 K := Nkind (Error_Msg_Node_1);
2569 -- If we have operator case, skip quotes since name of operator
2570 -- itself will supply the required quotations. An operator can be an
2571 -- applied use in an expression or an explicit operator symbol, or an
2572 -- identifier whose name indicates it is an operator.
2575 or else K = N_Operator_Symbol
2576 or else K = N_Defining_Operator_Symbol
2577 or else ((K = N_Identifier or else K = N_Defining_Identifier)
2578 and then Is_Operator_Name (Chars (Error_Msg_Node_1)))
2580 Set_Msg_Node (Error_Msg_Node_1);
2582 -- Normal case, not an operator, surround with quotes
2586 Set_Qualification (Error_Msg_Qual_Level, Error_Msg_Node_1);
2587 Set_Msg_Node (Error_Msg_Node_1);
2592 -- The following assignment ensures that a second ampersand insertion
2593 -- character will correspond to the Error_Msg_Node_2 parameter. We
2594 -- suppress possible validity checks in case operating in -gnatVa mode,
2595 -- and Error_Msg_Node_2 is not needed and has not been set.
2598 pragma Suppress (Range_Check);
2600 Error_Msg_Node_1 := Error_Msg_Node_2;
2602 end Set_Msg_Insertion_Node;
2604 --------------------------------------
2605 -- Set_Msg_Insertion_Type_Reference --
2606 --------------------------------------
2608 procedure Set_Msg_Insertion_Type_Reference (Flag : Source_Ptr) is
2614 if Error_Msg_Node_1 = Standard_Void_Type then
2615 Set_Msg_Str ("package or procedure name");
2618 elsif Error_Msg_Node_1 = Standard_Exception_Type then
2619 Set_Msg_Str ("exception name");
2622 elsif Error_Msg_Node_1 = Any_Access
2623 or else Error_Msg_Node_1 = Any_Array
2624 or else Error_Msg_Node_1 = Any_Boolean
2625 or else Error_Msg_Node_1 = Any_Character
2626 or else Error_Msg_Node_1 = Any_Composite
2627 or else Error_Msg_Node_1 = Any_Discrete
2628 or else Error_Msg_Node_1 = Any_Fixed
2629 or else Error_Msg_Node_1 = Any_Integer
2630 or else Error_Msg_Node_1 = Any_Modular
2631 or else Error_Msg_Node_1 = Any_Numeric
2632 or else Error_Msg_Node_1 = Any_Real
2633 or else Error_Msg_Node_1 = Any_Scalar
2634 or else Error_Msg_Node_1 = Any_String
2636 Get_Unqualified_Decoded_Name_String (Chars (Error_Msg_Node_1));
2637 Set_Msg_Name_Buffer;
2640 elsif Error_Msg_Node_1 = Universal_Real then
2641 Set_Msg_Str ("type universal real");
2644 elsif Error_Msg_Node_1 = Universal_Integer then
2645 Set_Msg_Str ("type universal integer");
2648 elsif Error_Msg_Node_1 = Universal_Fixed then
2649 Set_Msg_Str ("type universal fixed");
2653 -- Special case of anonymous array
2655 if Nkind (Error_Msg_Node_1) in N_Entity
2656 and then Is_Array_Type (Error_Msg_Node_1)
2657 and then Present (Related_Array_Object (Error_Msg_Node_1))
2659 Set_Msg_Str ("type of ");
2660 Set_Msg_Node (Related_Array_Object (Error_Msg_Node_1));
2661 Set_Msg_Str (" declared");
2662 Set_Msg_Insertion_Line_Number
2663 (Sloc (Related_Array_Object (Error_Msg_Node_1)), Flag);
2667 -- If we fall through, it is not a special case, so first output
2668 -- the name of the type, preceded by private for a private type
2670 if Is_Private_Type (Error_Msg_Node_1) then
2671 Set_Msg_Str ("private type ");
2673 Set_Msg_Str ("type ");
2676 Ent := Error_Msg_Node_1;
2678 if Is_Internal_Name (Chars (Ent)) then
2679 Unwind_Internal_Type (Ent);
2682 -- Types in Standard are displayed as "Standard.name"
2684 if Sloc (Ent) <= Standard_Location then
2686 Set_Msg_Str ("Standard.");
2691 -- Types in other language defined units are displayed as
2692 -- "package-name.type-name"
2695 Is_Predefined_File_Name (Unit_File_Name (Get_Source_Unit (Ent)))
2697 Get_Unqualified_Decoded_Name_String
2698 (Unit_Name (Get_Source_Unit (Ent)));
2699 Name_Len := Name_Len - 2;
2700 Set_Msg_Blank_Conditional;
2702 Set_Casing (Mixed_Case);
2703 Set_Msg_Name_Buffer;
2705 Set_Casing (Mixed_Case);
2710 -- All other types display as "type name" defined at line xxx
2711 -- possibly qualified if qualification is requested.
2715 Set_Qualification (Error_Msg_Qual_Level, Ent);
2719 -- If we did not print a name (e.g. in the case of an anonymous
2720 -- subprogram type), there is no name to print, so remove quotes.
2722 if Buffer_Ends_With ('"') then
2723 Buffer_Remove ('"');
2729 -- If the original type did not come from a predefined file, add the
2730 -- location where the type was defined.
2732 if Sloc (Error_Msg_Node_1) > Standard_Location
2734 not Is_Predefined_File_Name
2735 (Unit_File_Name (Get_Source_Unit (Error_Msg_Node_1)))
2737 Set_Msg_Str (" defined");
2738 Set_Msg_Insertion_Line_Number (Sloc (Error_Msg_Node_1), Flag);
2740 -- If it did come from a predefined file, deal with the case where
2741 -- this was a file with a generic instantiation from elsewhere.
2744 if Sloc (Error_Msg_Node_1) > Standard_Location then
2746 Iloc : constant Source_Ptr :=
2747 Instantiation_Location (Sloc (Error_Msg_Node_1));
2750 if Iloc /= No_Location
2751 and then not Suppress_Instance_Location
2753 Set_Msg_Str (" from instance");
2754 Set_Msg_Insertion_Line_Number (Iloc, Flag);
2759 end Set_Msg_Insertion_Type_Reference;
2761 ---------------------------------
2762 -- Set_Msg_Insertion_Unit_Name --
2763 ---------------------------------
2765 procedure Set_Msg_Insertion_Unit_Name (Suffix : Boolean := True) is
2767 if Error_Msg_Unit_1 = No_Unit_Name then
2770 elsif Error_Msg_Unit_1 = Error_Unit_Name then
2772 Set_Msg_Str ("<error>");
2775 Get_Unit_Name_String (Error_Msg_Unit_1, Suffix);
2778 Set_Msg_Name_Buffer;
2782 -- The following assignment ensures that a second percent insertion
2783 -- character will correspond to the Error_Msg_Unit_2 parameter. We
2784 -- suppress possible validity checks in case operating in -gnatVa mode,
2785 -- and Error_Msg_Unit_2 is not needed and has not been set.
2788 pragma Suppress (Range_Check);
2790 Error_Msg_Unit_1 := Error_Msg_Unit_2;
2792 end Set_Msg_Insertion_Unit_Name;
2798 procedure Set_Msg_Node (Node : Node_Id) is
2804 case Nkind (Node) is
2805 when N_Designator =>
2806 Set_Msg_Node (Name (Node));
2808 Set_Msg_Node (Identifier (Node));
2811 when N_Defining_Program_Unit_Name =>
2812 Set_Msg_Node (Name (Node));
2814 Set_Msg_Node (Defining_Identifier (Node));
2817 when N_Expanded_Name
2818 | N_Selected_Component
2820 Set_Msg_Node (Prefix (Node));
2822 Set_Msg_Node (Selector_Name (Node));
2829 -- The only remaining possibilities are identifiers, defining
2830 -- identifiers, pragmas, and pragma argument associations.
2832 if Nkind (Node) = N_Pragma then
2833 Nam := Pragma_Name (Node);
2836 -- The other cases have Chars fields
2838 -- First deal with internal names, which generally represent something
2839 -- gone wrong. First attempt: if this is a rewritten node that rewrites
2840 -- something with a Chars field that is not an internal name, use that.
2842 elsif Is_Internal_Name (Chars (Node))
2843 and then Nkind (Original_Node (Node)) in N_Has_Chars
2844 and then not Is_Internal_Name (Chars (Original_Node (Node)))
2846 Nam := Chars (Original_Node (Node));
2847 Loc := Sloc (Original_Node (Node));
2849 -- Another shot for internal names, in the case of internal type names,
2850 -- we try to find a reasonable representation for the external name.
2852 elsif Is_Internal_Name (Chars (Node))
2854 ((Is_Entity_Name (Node)
2855 and then Present (Entity (Node))
2856 and then Is_Type (Entity (Node)))
2858 (Nkind (Node) = N_Defining_Identifier and then Is_Type (Node)))
2860 if Nkind (Node) = N_Identifier then
2861 Ent := Entity (Node);
2868 -- If the type is the designated type of an access_to_subprogram,
2869 -- then there is no name to provide in the call.
2871 if Ekind (Ent) = E_Subprogram_Type then
2874 -- Otherwise, we will be able to find some kind of name to output
2877 Unwind_Internal_Type (Ent);
2881 -- If not internal name, or if we could not find a reasonable possible
2882 -- substitution for the internal name, just use name in Chars field.
2885 Nam := Chars (Node);
2889 -- At this stage, the name to output is in Nam
2891 Get_Unqualified_Decoded_Name_String (Nam);
2893 -- Remove trailing upper case letters from the name (useful for
2894 -- dealing with some cases of internal names).
2896 while Name_Len > 1 and then Name_Buffer (Name_Len) in 'A' .. 'Z' loop
2897 Name_Len := Name_Len - 1;
2900 -- If we have any of the names from standard that start with the
2901 -- characters "any " (e.g. Any_Type), then kill the message since
2902 -- almost certainly it is a junk cascaded message.
2905 and then Name_Buffer (1 .. 4) = "any "
2907 Kill_Message := True;
2910 -- If we still have an internal name, kill the message (will only
2911 -- work if we already had errors!)
2913 if Is_Internal_Name then
2914 Kill_Message := True;
2916 -- Remaining step is to adjust casing and possibly add 'Class
2918 Adjust_Name_Case (Global_Name_Buffer, Loc);
2919 Set_Msg_Name_Buffer;
2927 procedure Set_Msg_Text (Text : String; Flag : Source_Ptr) is
2928 C : Character; -- Current character
2929 P : Natural; -- Current index;
2931 procedure Skip_Msg_Insertion_Warning (C : Character);
2932 -- Deal with ? ?? ?x? ?X? ?*? ?$? insertion sequences (and the same
2933 -- sequences using < instead of ?). The caller has already bumped
2934 -- the pointer past the initial ? or < and C is set to this initial
2935 -- character (? or <). This procedure skips past the rest of the
2936 -- sequence. We do not need to set Msg_Insertion_Char, since this
2937 -- was already done during the message prescan.
2939 --------------------------------
2940 -- Skip_Msg_Insertion_Warning --
2941 --------------------------------
2943 procedure Skip_Msg_Insertion_Warning (C : Character) is
2945 if P <= Text'Last and then Text (P) = C then
2948 elsif P + 1 <= Text'Last
2949 and then (Text (P) in 'a' .. 'z'
2951 Text (P) in 'A' .. 'Z'
2956 and then Text (P + 1) = C
2960 end Skip_Msg_Insertion_Warning;
2962 -- Start of processing for Set_Msg_Text
2965 Manual_Quote_Mode := False;
2967 Flag_Source := Get_Source_File_Index (Flag);
2969 -- Skip info: at start, we have recorded this in Is_Info_Msg, and this
2970 -- will be used (Info field in error message object) to put back the
2971 -- string when it is printed. We need to do this, or we get confused
2972 -- with instantiation continuations.
2975 and then Text (Text'First .. Text'First + 5) = "info: "
2977 P := Text'First + 6;
2982 -- Loop through characters of message
2984 while P <= Text'Last loop
2988 -- Check for insertion character or sequence
2992 if P <= Text'Last and then Text (P) = '%' then
2994 Set_Msg_Insertion_Name_Literal;
2996 Set_Msg_Insertion_Name;
3000 if P <= Text'Last and then Text (P) = '$' then
3002 Set_Msg_Insertion_Unit_Name (Suffix => False);
3004 Set_Msg_Insertion_Unit_Name;
3008 Set_Msg_Insertion_File_Name;
3011 Set_Msg_Insertion_Type_Reference (Flag);
3014 Set_Msg_Insertion_Reserved_Name;
3017 Set_Msg_Insertion_Node;
3020 Set_Msg_Insertion_Line_Number (Error_Msg_Sloc, Flag);
3023 Continuation := True;
3025 if P <= Text'Last and then Text (P) = '\' then
3026 Continuation_New_Line := True;
3031 Set_Msg_Insertion_Column;
3034 Set_Msg_Insertion_Run_Time_Name;
3037 Set_Msg_Insertion_Uint;
3040 Manual_Quote_Mode := not Manual_Quote_Mode;
3044 null; -- already dealt with
3047 Skip_Msg_Insertion_Warning ('?');
3050 Skip_Msg_Insertion_Warning ('<');
3053 null; -- already dealt with
3056 Set_Msg_Char (Text (P));
3060 Set_Msg_Str (Error_Msg_String (1 .. Error_Msg_Strlen));
3062 -- Upper case letter
3066 -- Start of reserved word if two or more
3068 if P <= Text'Last and then Text (P) in 'A' .. 'Z' then
3070 Set_Msg_Insertion_Reserved_Word (Text, P);
3072 -- Single upper case letter is just inserted
3078 -- '[' (will be/would have been raised at run time)
3081 if Is_Warning_Msg then
3082 Set_Msg_Str ("will be raised at run time");
3084 Set_Msg_Str ("would have been raised at run time");
3087 -- ']' (may be/might have been raised at run time)
3090 if Is_Warning_Msg then
3091 Set_Msg_Str ("may be raised at run time");
3093 Set_Msg_Str ("might have been raised at run time");
3096 -- Normal character with no special treatment
3108 procedure Set_Posted (N : Node_Id) is
3112 if Is_Serious_Error then
3114 -- We always set Error_Posted on the node itself
3116 Set_Error_Posted (N);
3118 -- If it is a subexpression, then set Error_Posted on parents up to
3119 -- and including the first non-subexpression construct. This helps
3120 -- avoid cascaded error messages within a single expression.
3126 Set_Error_Posted (P);
3127 exit when Nkind (P) not in N_Subexpr;
3130 if Nkind_In (P, N_Pragma_Argument_Association,
3131 N_Component_Association,
3132 N_Discriminant_Association,
3133 N_Generic_Association,
3134 N_Parameter_Association)
3136 Set_Error_Posted (Parent (P));
3139 -- A special check, if we just posted an error on an attribute
3140 -- definition clause, then also set the entity involved as posted.
3141 -- For example, this stops complaining about the alignment after
3142 -- complaining about the size, which is likely to be useless.
3144 if Nkind (P) = N_Attribute_Definition_Clause then
3145 if Is_Entity_Name (Name (P)) then
3146 Set_Error_Posted (Entity (Name (P)));
3152 -----------------------
3153 -- Set_Qualification --
3154 -----------------------
3156 procedure Set_Qualification (N : Nat; E : Entity_Id) is
3158 if N /= 0 and then Scope (E) /= Standard_Standard then
3159 Set_Qualification (N - 1, Scope (E));
3160 Set_Msg_Node (Scope (E));
3163 end Set_Qualification;
3165 ------------------------
3166 -- Special_Msg_Delete --
3167 ------------------------
3169 -- Is it really right to have all this specialized knowledge in errout?
3171 function Special_Msg_Delete
3173 N : Node_Or_Entity_Id;
3174 E : Node_Or_Entity_Id) return Boolean
3177 -- Never delete messages in -gnatdO mode
3179 if Debug_Flag_OO then
3182 -- Processing for "atomic access cannot be guaranteed"
3184 elsif Msg = "atomic access to & cannot be guaranteed" then
3186 -- When an atomic object refers to a non-atomic type in the same
3187 -- scope, we implicitly make the type atomic. In the non-error case
3188 -- this is surely safe (and in fact prevents an error from occurring
3189 -- if the type is not atomic by default). But if the object cannot be
3190 -- made atomic, then we introduce an extra junk message by this
3191 -- manipulation, which we get rid of here.
3193 -- We identify this case by the fact that it references a type for
3194 -- which Is_Atomic is set, but there is no Atomic pragma setting it.
3197 and then Is_Atomic (E)
3198 and then No (Get_Rep_Pragma (E, Name_Atomic))
3203 -- Similar processing for "volatile full access cannot be guaranteed"
3205 elsif Msg = "volatile full access to & cannot be guaranteed" then
3207 and then Is_Volatile_Full_Access (E)
3208 and then No (Get_Rep_Pragma (E, Name_Volatile_Full_Access))
3213 -- Processing for "Size too small" messages
3215 elsif Msg = "size for& too small, minimum allowed is ^" then
3217 -- Suppress "size too small" errors in CodePeer mode, since code may
3218 -- be analyzed in a different configuration than the one used for
3219 -- compilation. Even when the configurations match, this message
3220 -- may be issued on correct code, because pragma Pack is ignored
3221 -- in CodePeer mode.
3223 if CodePeer_Mode then
3226 -- When a size is wrong for a frozen type there is no explicit size
3227 -- clause, and other errors have occurred, suppress the message,
3228 -- since it is likely that this size error is a cascaded result of
3229 -- other errors. The reason we eliminate unfrozen types is that
3230 -- messages issued before the freeze type are for sure OK.
3233 and then Serious_Errors_Detected > 0
3234 and then Nkind (N) /= N_Component_Clause
3235 and then Nkind (Parent (N)) /= N_Component_Clause
3237 No (Get_Attribute_Definition_Clause (E, Attribute_Size))
3239 No (Get_Attribute_Definition_Clause (E, Attribute_Object_Size))
3241 No (Get_Attribute_Definition_Clause (E, Attribute_Value_Size))
3247 -- All special tests complete, so go ahead with message
3250 end Special_Msg_Delete;
3256 procedure SPARK_Msg_N (Msg : String; N : Node_Or_Entity_Id) is
3258 if SPARK_Mode /= Off then
3259 Error_Msg_N (Msg, N);
3267 procedure SPARK_Msg_NE
3269 N : Node_Or_Entity_Id;
3270 E : Node_Or_Entity_Id)
3273 if SPARK_Mode /= Off then
3274 Error_Msg_NE (Msg, N, E);
3278 --------------------------
3279 -- Unwind_Internal_Type --
3280 --------------------------
3282 procedure Unwind_Internal_Type (Ent : in out Entity_Id) is
3283 Derived : Boolean := False;
3285 Old_Ent : Entity_Id;
3288 -- Undo placement of a quote, since we will put it back later
3290 Mchar := Msg_Buffer (Msglen);
3293 Msglen := Msglen - 1;
3296 -- The loop here deals with recursive types, we are trying to find a
3297 -- related entity that is not an implicit type. Note that the check with
3298 -- Old_Ent stops us from getting "stuck". Also, we don't output the
3299 -- "type derived from" message more than once in the case where we climb
3300 -- up multiple levels.
3305 -- Implicit access type, use directly designated type In Ada 2005,
3306 -- the designated type may be an anonymous access to subprogram, in
3307 -- which case we can only point to its definition.
3309 if Is_Access_Type (Ent) then
3310 if Ekind (Ent) = E_Access_Subprogram_Type
3311 or else Ekind (Ent) = E_Anonymous_Access_Subprogram_Type
3312 or else Is_Access_Protected_Subprogram_Type (Ent)
3314 Ent := Directly_Designated_Type (Ent);
3316 if not Comes_From_Source (Ent) then
3317 if Buffer_Ends_With ("type ") then
3318 Buffer_Remove ("type ");
3322 if Ekind (Ent) = E_Function then
3323 Set_Msg_Str ("access to function ");
3324 elsif Ekind (Ent) = E_Procedure then
3325 Set_Msg_Str ("access to procedure ");
3327 Set_Msg_Str ("access to subprogram");
3332 -- Type is access to object, named or anonymous
3335 Set_Msg_Str ("access to ");
3336 Ent := Directly_Designated_Type (Ent);
3341 elsif Is_Class_Wide_Type (Ent) then
3343 Ent := Root_Type (Ent);
3345 -- Use base type if this is a subtype
3347 elsif Ent /= Base_Type (Ent) then
3348 Buffer_Remove ("type ");
3350 -- Avoid duplication "subtype of subtype of", and also replace
3351 -- "derived from subtype of" simply by "derived from"
3353 if not Buffer_Ends_With ("subtype of ")
3354 and then not Buffer_Ends_With ("derived from ")
3356 Set_Msg_Str ("subtype of ");
3359 Ent := Base_Type (Ent);
3361 -- If this is a base type with a first named subtype, use the first
3362 -- named subtype instead. This is not quite accurate in all cases,
3363 -- but it makes too much noise to be accurate and add 'Base in all
3364 -- cases. Note that we only do this is the first named subtype is not
3365 -- itself an internal name. This avoids the obvious loop (subtype ->
3366 -- basetype -> subtype) which would otherwise occur).
3370 FST : constant Entity_Id := First_Subtype (Ent);
3373 if not Is_Internal_Name (Chars (FST)) then
3377 -- Otherwise use root type
3381 Buffer_Remove ("type ");
3383 -- Test for "subtype of type derived from" which seems
3384 -- excessive and is replaced by "type derived from".
3386 Buffer_Remove ("subtype of");
3388 -- Avoid duplicated "type derived from type derived from"
3390 if not Buffer_Ends_With ("type derived from ") then
3391 Set_Msg_Str ("type derived from ");
3402 -- If we are stuck in a loop, get out and settle for the internal
3403 -- name after all. In this case we set to kill the message if it is
3404 -- not the first error message (we really try hard not to show the
3405 -- dirty laundry of the implementation to the poor user).
3407 if Ent = Old_Ent then
3408 Kill_Message := True;
3412 -- Get out if we finally found a non-internal name to use
3414 exit Find when not Is_Internal_Name (Chars (Ent));
3420 end Unwind_Internal_Type;
3422 --------------------
3423 -- Warn_Insertion --
3424 --------------------
3426 function Warn_Insertion return String is
3428 case Warning_Msg_Char is
3432 when 'a' .. 'z' | 'A' .. 'Z' | '*' | '$' =>
3433 return '?' & Warning_Msg_Char & '?';
3439 raise Program_Error;