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
;
42 with Nlists
; use Nlists
;
43 with Output
; use Output
;
44 with Scans
; use Scans
;
45 with Sem_Aux
; use Sem_Aux
;
46 with Sinput
; use Sinput
;
47 with Sinfo
; use Sinfo
;
48 with Snames
; use Snames
;
49 with Stand
; use Stand
;
50 with Stylesw
; use Stylesw
;
51 with Uname
; use Uname
;
53 package body Errout
is
55 Errors_Must_Be_Ignored
: Boolean := False;
56 -- Set to True by procedure Set_Ignore_Errors (True), when calls to error
57 -- message procedures should be ignored (when parsing irrelevant text in
58 -- sources being preprocessed).
60 Finalize_Called
: Boolean := False;
61 -- Set True if the Finalize routine has been called
63 Warn_On_Instance
: Boolean;
64 -- Flag set true for warning message to be posted on instance
66 ------------------------------------
67 -- Table of Non-Instance Messages --
68 ------------------------------------
70 -- This table contains an entry for every error message processed by the
71 -- Error_Msg routine that is not posted on generic (or inlined) instance.
72 -- As explained in further detail in the Error_Msg procedure body, this
73 -- table is used to avoid posting redundant messages on instances.
75 type NIM_Record
is record
79 -- Type used to store text and location of one message
81 package Non_Instance_Msgs
is new Table
.Table
(
82 Table_Component_Type
=> NIM_Record
,
83 Table_Index_Type
=> Int
,
86 Table_Increment
=> 100,
87 Table_Name
=> "Non_Instance_Msgs");
89 -----------------------
90 -- Local Subprograms --
91 -----------------------
93 procedure Error_Msg_Internal
98 -- This is the low level routine used to post messages after dealing with
99 -- the issue of messages placed on instantiations (which get broken up
100 -- into separate calls in Error_Msg). Sptr is the location on which the
101 -- flag will be placed in the output. In the case where the flag is on
102 -- the template, this points directly to the template, not to one of the
103 -- instantiation copies of the template. Optr is the original location
104 -- used to flag the error, and this may indeed point to an instantiation
105 -- copy. So typically we can see Optr pointing to the template location
106 -- in an instantiation copy when Sptr points to the source location of
107 -- the actual instantiation (i.e the line with the new). Msg_Cont is
108 -- set true if this is a continuation message.
110 function No_Warnings
(N
: Node_Or_Entity_Id
) return Boolean;
111 -- Determines if warnings should be suppressed for the given node
113 function OK_Node
(N
: Node_Id
) return Boolean;
114 -- Determines if a node is an OK node to place an error message on (return
115 -- True) or if the error message should be suppressed (return False). A
116 -- message is suppressed if the node already has an error posted on it,
117 -- or if it refers to an Etype that has an error posted on it, or if
118 -- it references an Entity that has an error posted on it.
120 procedure Output_Source_Line
121 (L
: Physical_Line_Number
;
122 Sfile
: Source_File_Index
;
124 -- Outputs text of source line L, in file S, together with preceding line
125 -- number, as described above for Output_Line_Number. The Errs parameter
126 -- indicates if there are errors attached to the line, which forces
127 -- listing on, even in the presence of pragma List (Off).
129 procedure Set_Msg_Insertion_Column
;
130 -- Handle column number insertion (@ insertion character)
132 procedure Set_Msg_Insertion_Node
;
133 -- Handle node (name from node) insertion (& insertion character)
135 procedure Set_Msg_Insertion_Type_Reference
(Flag
: Source_Ptr
);
136 -- Handle type reference (right brace insertion character). Flag is the
137 -- location of the flag, which is provided for the internal call to
138 -- Set_Msg_Insertion_Line_Number,
140 procedure Set_Msg_Insertion_Unit_Name
(Suffix
: Boolean := True);
141 -- Handle unit name insertion ($ insertion character). Depending on Boolean
142 -- parameter Suffix, (spec) or (body) is appended after the unit name.
144 procedure Set_Msg_Node
(Node
: Node_Id
);
145 -- Add the sequence of characters for the name associated with the given
146 -- node to the current message. For N_Designator, N_Selected_Component,
147 -- N_Defining_Program_Unit_Name, and N_Expanded_Name, the Prefix is
150 procedure Set_Msg_Text
(Text
: String; Flag
: Source_Ptr
);
151 -- Add a sequence of characters to the current message. The characters may
152 -- be one of the special insertion characters (see documentation in spec).
153 -- Flag is the location at which the error is to be posted, which is used
154 -- to determine whether or not the # insertion needs a file name. The
155 -- variables Msg_Buffer are set on return Msglen.
157 procedure Set_Posted
(N
: Node_Id
);
158 -- Sets the Error_Posted flag on the given node, and all its parents that
159 -- are subexpressions and then on the parent non-subexpression construct
160 -- that contains the original expression. If that parent is a named
161 -- association, the flag is further propagated to its parent. This is done
162 -- in order to guard against cascaded errors. Note that this call has an
163 -- effect for a serious error only.
165 procedure Set_Qualification
(N
: Nat
; E
: Entity_Id
);
166 -- Outputs up to N levels of qualification for the given entity. For
167 -- example, the entity A.B.C.D will output B.C. if N = 2.
169 function Special_Msg_Delete
171 N
: Node_Or_Entity_Id
;
172 E
: Node_Or_Entity_Id
) return Boolean;
173 -- This function is called from Error_Msg_NEL, passing the message Msg,
174 -- node N on which the error is to be posted, and the entity or node E
175 -- to be used for an & insertion in the message if any. The job of this
176 -- procedure is to test for certain cascaded messages that we would like
177 -- to suppress. If the message is to be suppressed then we return True.
178 -- If the message should be generated (the normal case) False is returned.
180 procedure Unwind_Internal_Type
(Ent
: in out Entity_Id
);
181 -- This procedure is given an entity id for an internal type, i.e. a type
182 -- with an internal name. It unwinds the type to try to get to something
183 -- reasonably printable, generating prefixes like "subtype of", "access
184 -- to", etc along the way in the buffer. The value in Ent on return is the
185 -- final name to be printed. Hopefully this is not an internal name, but in
186 -- some internal name cases, it is an internal name, and has to be printed
187 -- anyway (although in this case the message has been killed if possible).
188 -- The global variable Class_Flag is set to True if the resulting entity
189 -- should have 'Class appended to its name (see Add_Class procedure), and
190 -- is otherwise unchanged.
192 function Warn_Insertion
return String;
193 -- This is called for warning messages only (so Warning_Msg_Char is set)
194 -- and returns a corresponding string to use at the beginning of generated
195 -- auxiliary messages, such as "in instantiation at ...".
196 -- 'a' .. 'z' returns "?x?"
197 -- 'A' .. 'Z' returns "?X?"
199 -- '$' returns "?$?info: "
201 -- No other settings are valid
203 -----------------------
204 -- Change_Error_Text --
205 -----------------------
207 procedure Change_Error_Text
(Error_Id
: Error_Msg_Id
; New_Msg
: String) is
208 Save_Next
: Error_Msg_Id
;
209 Err_Id
: Error_Msg_Id
:= Error_Id
;
212 Set_Msg_Text
(New_Msg
, Errors
.Table
(Error_Id
).Sptr
);
213 Errors
.Table
(Error_Id
).Text
:= new String'(Msg_Buffer (1 .. Msglen));
215 -- If in immediate error message mode, output modified error message now
216 -- This is just a bit tricky, because we want to output just a single
217 -- message, and the messages we modified is already linked in. We solve
218 -- this by temporarily resetting its forward pointer to empty.
220 if Debug_Flag_OO then
221 Save_Next := Errors.Table (Error_Id).Next;
222 Errors.Table (Error_Id).Next := No_Error_Msg;
225 (Errors.Table (Error_Id).Line, Errors.Table (Error_Id).Sfile, True);
226 Output_Error_Msgs (Err_Id);
227 Errors.Table (Error_Id).Next := Save_Next;
229 end Change_Error_Text;
231 ------------------------
232 -- Compilation_Errors --
233 ------------------------
235 function Compilation_Errors return Boolean is
237 if not Finalize_Called then
240 return Erroutc.Compilation_Errors;
242 end Compilation_Errors;
244 --------------------------------------
245 -- Delete_Warning_And_Continuations --
246 --------------------------------------
248 procedure Delete_Warning_And_Continuations (Msg : Error_Msg_Id) is
252 pragma Assert (not Errors.Table (Msg).Msg_Cont);
257 M : Error_Msg_Object renames Errors.Table (Id);
260 if not M.Deleted then
262 Warnings_Detected := Warnings_Detected - 1;
265 Info_Messages := Info_Messages - 1;
269 Warnings_Treated_As_Errors := Warnings_Treated_As_Errors - 1;
274 exit when Id = No_Error_Msg;
275 exit when not Errors.Table (Id).Msg_Cont;
278 end Delete_Warning_And_Continuations;
284 -- Error_Msg posts a flag at the given location, except that if the
285 -- Flag_Location points within a generic template and corresponds to an
286 -- instantiation of this generic template, then the actual message will be
287 -- posted on the generic instantiation, along with additional messages
288 -- referencing the generic declaration.
290 procedure Error_Msg (Msg : String; Flag_Location : Source_Ptr) is
291 Sindex : Source_File_Index;
292 -- Source index for flag location
294 Orig_Loc : Source_Ptr;
295 -- Original location of Flag_Location (i.e. location in original
296 -- template in instantiation case, otherwise unchanged).
299 -- It is a fatal error to issue an error message when scanning from the
300 -- internal source buffer (see Sinput for further documentation)
302 pragma Assert (Sinput.Source /= Internal_Source_Ptr);
304 -- Return if all errors are to be ignored
306 if Errors_Must_Be_Ignored then
310 -- If we already have messages, and we are trying to place a message at
311 -- No_Location or in package Standard, then just ignore the attempt
312 -- since we assume that what is happening is some cascaded junk. Note
313 -- that this is safe in the sense that proceeding will surely bomb.
315 if Flag_Location < First_Source_Ptr
316 and then Total_Errors_Detected > 0
321 -- Start of processing for new message
323 Sindex := Get_Source_File_Index (Flag_Location);
324 Prescan_Message (Msg);
325 Orig_Loc := Original_Location (Flag_Location);
327 -- If the current location is in an instantiation, the issue arises of
328 -- whether to post the message on the template or the instantiation.
330 -- The way we decide is to see if we have posted the same message on
331 -- the template when we compiled the template (the template is always
332 -- compiled before any instantiations). For this purpose, we use a
333 -- separate table of messages. The reason we do this is twofold:
335 -- First, the messages can get changed by various processing
336 -- including the insertion of tokens etc, making it hard to
337 -- do the comparison.
339 -- Second, we will suppress a warning on a template if it is not in
340 -- the current extended source unit. That's reasonable and means we
341 -- don't want the warning on the instantiation here either, but it
342 -- does mean that the main error table would not in any case include
345 if Flag_Location = Orig_Loc then
346 Non_Instance_Msgs.Append ((new String'(Msg
), Flag_Location
));
347 Warn_On_Instance
:= False;
349 -- Here we have an instance message
352 -- Delete if debug flag off, and this message duplicates a message
353 -- already posted on the corresponding template
355 if not Debug_Flag_GG
then
356 for J
in Non_Instance_Msgs
.First
.. Non_Instance_Msgs
.Last
loop
357 if Msg
= Non_Instance_Msgs
.Table
(J
).Msg
.all
358 and then Non_Instance_Msgs
.Table
(J
).Loc
= Orig_Loc
365 -- No duplicate, so error/warning will be posted on instance
367 Warn_On_Instance
:= Is_Warning_Msg
;
370 -- Ignore warning message that is suppressed for this location. Note
371 -- that style checks are not considered warning messages for this
374 if Is_Warning_Msg
and then Warnings_Suppressed
(Orig_Loc
) /= No_String
378 -- For style messages, check too many messages so far
381 and then Maximum_Messages
/= 0
382 and then Warnings_Detected
>= Maximum_Messages
387 -- The idea at this stage is that we have two kinds of messages
389 -- First, we have those messages that are to be placed as requested at
390 -- Flag_Location. This includes messages that have nothing to do with
391 -- generics, and also messages placed on generic templates that reflect
392 -- an error in the template itself. For such messages we simply call
393 -- Error_Msg_Internal to place the message in the requested location.
395 if Instantiation
(Sindex
) = No_Location
then
396 Error_Msg_Internal
(Msg
, Flag_Location
, Flag_Location
, False);
400 -- If we are trying to flag an error in an instantiation, we may have
401 -- a generic contract violation. What we generate in this case is:
403 -- instantiation error at ...
404 -- original error message
408 -- warning: in instantiation at
409 -- warning: original warning message
411 -- All these messages are posted at the location of the top level
412 -- instantiation. If there are nested instantiations, then the
413 -- instantiation error message can be repeated, pointing to each
414 -- of the relevant instantiations.
416 -- Note: the instantiation mechanism is also shared for inlining of
417 -- subprogram bodies when front end inlining is done. In this case the
418 -- messages have the form:
420 -- in inlined body at ...
421 -- original error message
425 -- warning: in inlined body at
426 -- warning: original warning message
428 -- OK, here we have an instantiation error, and we need to generate the
429 -- error on the instantiation, rather than on the template.
432 Actual_Error_Loc
: Source_Ptr
;
433 -- Location of outer level instantiation in instantiation case, or
434 -- just a copy of Flag_Location in the normal case. This is the
435 -- location where all error messages will actually be posted.
437 Save_Error_Msg_Sloc
: constant Source_Ptr
:= Error_Msg_Sloc
;
438 -- Save possible location set for caller's message. We need to use
439 -- Error_Msg_Sloc for the location of the instantiation error but we
440 -- have to preserve a possible original value.
442 X
: Source_File_Index
;
444 Msg_Cont_Status
: Boolean;
445 -- Used to label continuation lines in instantiation case with
446 -- proper Msg_Cont status.
449 -- Loop to find highest level instantiation, where all error
450 -- messages will be placed.
454 Actual_Error_Loc
:= Instantiation
(X
);
455 X
:= Get_Source_File_Index
(Actual_Error_Loc
);
456 exit when Instantiation
(X
) = No_Location
;
459 -- Since we are generating the messages at the instantiation point in
460 -- any case, we do not want the references to the bad lines in the
461 -- instance to be annotated with the location of the instantiation.
463 Suppress_Instance_Location
:= True;
464 Msg_Cont_Status
:= False;
466 -- Loop to generate instantiation messages
468 Error_Msg_Sloc
:= Flag_Location
;
469 X
:= Get_Source_File_Index
(Flag_Location
);
470 while Instantiation
(X
) /= No_Location
loop
472 -- Suppress instantiation message on continuation lines
474 if Msg
(Msg
'First) /= '\' then
476 -- Case of inlined body
478 if Inlined_Body
(X
) then
479 if Is_Warning_Msg
or Is_Style_Msg
then
481 (Warn_Insertion
& "in inlined body #",
482 Actual_Error_Loc
, Flag_Location
, Msg_Cont_Status
);
485 ("error in inlined body #",
486 Actual_Error_Loc
, Flag_Location
, Msg_Cont_Status
);
489 -- Case of generic instantiation
492 if Is_Warning_Msg
or else Is_Style_Msg
then
494 (Warn_Insertion
& "in instantiation #",
495 Actual_Error_Loc
, Flag_Location
, Msg_Cont_Status
);
498 ("instantiation error #",
499 Actual_Error_Loc
, Flag_Location
, Msg_Cont_Status
);
504 Error_Msg_Sloc
:= Instantiation
(X
);
505 X
:= Get_Source_File_Index
(Error_Msg_Sloc
);
506 Msg_Cont_Status
:= True;
509 Suppress_Instance_Location
:= False;
510 Error_Msg_Sloc
:= Save_Error_Msg_Sloc
;
512 -- Here we output the original message on the outer instantiation
515 (Msg
, Actual_Error_Loc
, Flag_Location
, Msg_Cont_Status
);
519 --------------------------------
520 -- Error_Msg_Ada_2012_Feature --
521 --------------------------------
523 procedure Error_Msg_Ada_2012_Feature
(Feature
: String; Loc
: Source_Ptr
) is
525 if Ada_Version
< Ada_2012
then
526 Error_Msg
(Feature
& " is an Ada 2012 feature", Loc
);
528 if No
(Ada_Version_Pragma
) then
529 Error_Msg
("\unit must be compiled with -gnat2012 switch", Loc
);
531 Error_Msg_Sloc
:= Sloc
(Ada_Version_Pragma
);
532 Error_Msg
("\incompatible with Ada version set#", Loc
);
535 end Error_Msg_Ada_2012_Feature
;
541 procedure Error_Msg_AP
(Msg
: String) is
546 -- If we had saved the Scan_Ptr value after scanning the previous
547 -- token, then we would have exactly the right place for putting
548 -- the flag immediately at hand. However, that would add at least
549 -- two instructions to a Scan call *just* to service the possibility
550 -- of an Error_Msg_AP call. So instead we reconstruct that value.
552 -- We have two possibilities, start with Prev_Token_Ptr and skip over
553 -- the current token, which is made harder by the possibility that this
554 -- token may be in error, or start with Token_Ptr and work backwards.
555 -- We used to take the second approach, but it's hard because of
556 -- comments, and harder still because things that look like comments
557 -- can appear inside strings. So now we take the first approach.
559 -- Note: in the case where there is no previous token, Prev_Token_Ptr
560 -- is set to Source_First, which is a reasonable position for the
561 -- error flag in this situation.
563 S1
:= Prev_Token_Ptr
;
566 -- If the previous token is a string literal, we need a special approach
567 -- since there may be white space inside the literal and we don't want
568 -- to stop on that white space.
570 -- Note: since this is an error recovery issue anyway, it is not worth
571 -- worrying about special UTF_32 line terminator characters here.
573 if Prev_Token
= Tok_String_Literal
then
577 if Source
(S1
) = C
then
579 exit when Source
(S1
) /= C
;
580 elsif Source
(S1
) in Line_Terminator
then
585 -- Character literal also needs special handling
587 elsif Prev_Token
= Tok_Char_Literal
then
590 -- Otherwise we search forward for the end of the current token, marked
591 -- by a line terminator, white space, a comment symbol or if we bump
592 -- into the following token (i.e. the current token).
594 -- Again, it is not worth worrying about UTF_32 special line terminator
595 -- characters in this context, since this is only for error recovery.
598 while Source
(S1
) not in Line_Terminator
599 and then Source
(S1
) /= ' '
600 and then Source
(S1
) /= ASCII
.HT
601 and then (Source
(S1
) /= '-' or else Source
(S1
+ 1) /= '-')
602 and then S1
/= Token_Ptr
608 -- S1 is now set to the location for the flag
617 procedure Error_Msg_BC
(Msg
: String) is
619 -- If we are at end of file, post the flag after the previous token
621 if Token
= Tok_EOF
then
624 -- If we are at start of file, post the flag at the current token
626 elsif Token_Ptr
= Source_First
(Current_Source_File
) then
629 -- If the character before the current token is a space or a horizontal
630 -- tab, then we place the flag on this character (in the case of a tab
631 -- we would really like to place it in the "last" character of the tab
632 -- space, but that it too much trouble to worry about).
634 elsif Source
(Token_Ptr
- 1) = ' '
635 or else Source
(Token_Ptr
- 1) = ASCII
.HT
637 Error_Msg
(Msg
, Token_Ptr
- 1);
639 -- If there is no space or tab before the current token, then there is
640 -- no room to place the flag before the token, so we place it on the
641 -- token instead (this happens for example at the start of a line).
644 Error_Msg
(Msg
, Token_Ptr
);
652 procedure Error_Msg_CRT
(Feature
: String; N
: Node_Id
) is
653 CNRT
: constant String := " not allowed in no run time mode";
654 CCRT
: constant String := " not supported by configuration>";
656 S
: String (1 .. Feature
'Length + 1 + CCRT
'Length);
661 S
(2 .. Feature
'Length + 1) := Feature
;
662 L
:= Feature
'Length + 2;
664 if No_Run_Time_Mode
then
665 S
(L
.. L
+ CNRT
'Length - 1) := CNRT
;
666 L
:= L
+ CNRT
'Length - 1;
668 else pragma Assert
(Configurable_Run_Time_Mode
);
669 S
(L
.. L
+ CCRT
'Length - 1) := CCRT
;
670 L
:= L
+ CCRT
'Length - 1;
673 Error_Msg_N
(S
(1 .. L
), N
);
674 Configurable_Run_Time_Violations
:= Configurable_Run_Time_Violations
+ 1;
681 procedure Error_Msg_PT
(Typ
: Node_Id
; Subp
: Node_Id
) is
684 ("first formal of & must be of mode `OUT`, `IN OUT` or " &
685 "access-to-variable", Typ
, Subp
);
687 ("\in order to be overridden by protected procedure or entry " &
688 "(RM 9.4(11.9/2))", Typ
);
695 procedure Error_Msg_F
(Msg
: String; N
: Node_Id
) is
697 Error_Msg_NEL
(Msg
, N
, N
, Sloc
(First_Node
(N
)));
704 procedure Error_Msg_FE
707 E
: Node_Or_Entity_Id
)
710 Error_Msg_NEL
(Msg
, N
, E
, Sloc
(First_Node
(N
)));
713 ------------------------
714 -- Error_Msg_Internal --
715 ------------------------
717 procedure Error_Msg_Internal
723 Next_Msg
: Error_Msg_Id
;
724 -- Pointer to next message at insertion point
726 Prev_Msg
: Error_Msg_Id
;
727 -- Pointer to previous message at insertion point
729 Temp_Msg
: Error_Msg_Id
;
732 -- Set if warning to be treated as error
734 procedure Handle_Serious_Error
;
735 -- Internal procedure to do all error message handling for a serious
736 -- error message, other than bumping the error counts and arranging
737 -- for the message to be output.
739 --------------------------
740 -- Handle_Serious_Error --
741 --------------------------
743 procedure Handle_Serious_Error
is
745 -- Turn off code generation if not done already
747 if Operating_Mode
= Generate_Code
then
748 Operating_Mode
:= Check_Semantics
;
749 Expander_Active
:= False;
752 -- Set the fatal error flag in the unit table unless we are in
753 -- Try_Semantics mode. This stops the semantics from being performed
754 -- if we find a serious error. This is skipped if we are currently
755 -- dealing with the configuration pragma file.
757 if not Try_Semantics
and then Current_Source_Unit
/= No_Unit
then
758 Set_Fatal_Error
(Get_Source_Unit
(Sptr
));
760 end Handle_Serious_Error
;
762 -- Start of processing for Error_Msg_Internal
765 if Raise_Exception_On_Error
/= 0 then
766 raise Error_Msg_Exception
;
769 Continuation
:= Msg_Cont
;
770 Continuation_New_Line
:= False;
771 Suppress_Message
:= False;
772 Kill_Message
:= False;
773 Set_Msg_Text
(Msg
, Sptr
);
775 -- Kill continuation if parent message killed
777 if Continuation
and Last_Killed
then
781 -- Return without doing anything if message is suppressed
784 and then not All_Errors_Mode
785 and then not Is_Warning_Msg
786 and then not Is_Unconditional_Msg
788 if not Continuation
then
795 -- Return without doing anything if message is killed and this is not
796 -- the first error message. The philosophy is that if we get a weird
797 -- error message and we already have had a message, then we hope the
798 -- weird message is a junk cascaded message
801 and then not All_Errors_Mode
802 and then Total_Errors_Detected
/= 0
804 if not Continuation
then
811 -- Special check for warning message to see if it should be output
813 if Is_Warning_Msg
then
815 -- Immediate return if warning message and warnings are suppressed
817 if Warnings_Suppressed
(Optr
) /= No_String
819 Warnings_Suppressed
(Sptr
) /= No_String
821 Cur_Msg
:= No_Error_Msg
;
825 -- If the flag location is in the main extended source unit then for
826 -- sure we want the warning since it definitely belongs
828 if In_Extended_Main_Source_Unit
(Sptr
) then
831 -- If the main unit has not been read yet. the warning must be on
832 -- a configuration file: gnat.adc or user-defined. This means we
833 -- are not parsing the main unit yet, so skip following checks.
835 elsif No
(Cunit
(Main_Unit
)) then
838 -- If the flag location is not in the main extended source unit, then
839 -- we want to eliminate the warning, unless it is in the extended
840 -- main code unit and we want warnings on the instance.
842 elsif In_Extended_Main_Code_Unit
(Sptr
) and then Warn_On_Instance
then
845 -- Keep warning if debug flag G set
847 elsif Debug_Flag_GG
then
850 -- Keep warning if message text contains !!
852 elsif Has_Double_Exclam
then
855 -- Here is where we delete a warning from a with'ed unit
858 Cur_Msg
:= No_Error_Msg
;
860 if not Continuation
then
868 -- If message is to be ignored in special ignore message mode, this is
869 -- where we do this special processing, bypassing message output.
871 if Ignore_Errors_Enable
> 0 then
872 if Is_Serious_Error
then
873 Handle_Serious_Error
;
879 -- If error message line length set, and this is a continuation message
880 -- then all we do is to append the text to the text of the last message
881 -- with a comma space separator (eliminating a possible (style) or
884 if Error_Msg_Line_Length
/= 0 and then Continuation
then
885 Cur_Msg
:= Errors
.Last
;
888 Oldm
: String_Ptr
:= Errors
.Table
(Cur_Msg
).Text
;
889 Newm
: String (1 .. Oldm
'Last + 2 + Msglen
);
894 -- First copy old message to new one and free it
896 Newm
(Oldm
'Range) := Oldm
.all;
900 -- Remove (style) or info: at start of message
902 if Msglen
> 8 and then Msg_Buffer
(1 .. 8) = "(style) " then
905 elsif Msglen
> 6 and then Msg_Buffer
(1 .. 6) = "info: " then
912 -- Now deal with separation between messages. Normally this is
913 -- simply comma space, but there are some special cases.
915 -- If continuation new line, then put actual NL character in msg
917 if Continuation_New_Line
then
919 Newm
(Newl
) := ASCII
.LF
;
921 -- If continuation message is enclosed in parentheses, then
922 -- special treatment (don't need a comma, and we want to combine
923 -- successive parenthetical remarks into a single one with
924 -- separating commas).
926 elsif Msg_Buffer
(M
) = '(' and then Msg_Buffer
(Msglen
) = ')' then
928 -- Case where existing message ends in right paren, remove
929 -- and separate parenthetical remarks with a comma.
931 if Newm
(Newl
) = ')' then
933 Msg_Buffer
(M
) := ' ';
935 -- Case where we are adding new parenthetical comment
942 -- Case where continuation not in parens and no new line
945 Newm
(Newl
+ 1 .. Newl
+ 2) := ", ";
949 -- Append new message
951 Newm
(Newl
+ 1 .. Newl
+ Msglen
- M
+ 1) :=
952 Msg_Buffer
(M
.. Msglen
);
953 Newl
:= Newl
+ Msglen
- M
+ 1;
954 Errors
.Table
(Cur_Msg
).Text
:= new String'(Newm (1 .. Newl));
956 -- Update warning msg flag and message doc char if needed
958 if Is_Warning_Msg then
959 if not Errors.Table (Cur_Msg).Warn then
960 Errors.Table (Cur_Msg).Warn := True;
961 Errors.Table (Cur_Msg).Warn_Chr := Warning_Msg_Char;
963 elsif Warning_Msg_Char /= ' ' then
964 Errors.Table (Cur_Msg).Warn_Chr := Warning_Msg_Char;
972 -- Here we build a new error object
975 ((Text => new String'(Msg_Buffer
(1 .. Msglen
)),
976 Next
=> No_Error_Msg
,
977 Prev
=> No_Error_Msg
,
980 Sfile
=> Get_Source_File_Index
(Sptr
),
981 Line
=> Get_Physical_Line_Number
(Sptr
),
982 Col
=> Get_Column_Number
(Sptr
),
983 Warn
=> Is_Warning_Msg
,
985 Warn_Err
=> False, -- reset below
986 Warn_Chr
=> Warning_Msg_Char
,
987 Style
=> Is_Style_Msg
,
988 Serious
=> Is_Serious_Error
,
989 Uncond
=> Is_Unconditional_Msg
,
990 Msg_Cont
=> Continuation
,
992 Cur_Msg
:= Errors
.Last
;
994 -- Test if warning to be treated as error
998 and then (Warning_Treated_As_Error
(Msg_Buffer
(1 .. Msglen
))
1000 Warning_Treated_As_Error
(Get_Warning_Tag
(Cur_Msg
)));
1002 -- Propagate Warn_Err to this message and preceding continuations
1004 for J
in reverse 1 .. Errors
.Last
loop
1005 Errors
.Table
(J
).Warn_Err
:= Warn_Err
;
1006 exit when not Errors
.Table
(J
).Msg_Cont
;
1009 -- If immediate errors mode set, output error message now. Also output
1010 -- now if the -d1 debug flag is set (so node number message comes out
1011 -- just before actual error message)
1013 if Debug_Flag_OO
or else Debug_Flag_1
then
1016 (Errors
.Table
(Cur_Msg
).Line
, Errors
.Table
(Cur_Msg
).Sfile
, True);
1017 Temp_Msg
:= Cur_Msg
;
1018 Output_Error_Msgs
(Temp_Msg
);
1020 -- If not in immediate errors mode, then we insert the message in the
1021 -- error chain for later output by Finalize. The messages are sorted
1022 -- first by unit (main unit comes first), and within a unit by source
1023 -- location (earlier flag location first in the chain).
1026 -- First a quick check, does this belong at the very end of the chain
1027 -- of error messages. This saves a lot of time in the normal case if
1028 -- there are lots of messages.
1030 if Last_Error_Msg
/= No_Error_Msg
1031 and then Errors
.Table
(Cur_Msg
).Sfile
=
1032 Errors
.Table
(Last_Error_Msg
).Sfile
1033 and then (Sptr
> Errors
.Table
(Last_Error_Msg
).Sptr
1035 (Sptr
= Errors
.Table
(Last_Error_Msg
).Sptr
1037 Optr
> Errors
.Table
(Last_Error_Msg
).Optr
))
1039 Prev_Msg
:= Last_Error_Msg
;
1040 Next_Msg
:= No_Error_Msg
;
1042 -- Otherwise do a full sequential search for the insertion point
1045 Prev_Msg
:= No_Error_Msg
;
1046 Next_Msg
:= First_Error_Msg
;
1047 while Next_Msg
/= No_Error_Msg
loop
1049 Errors
.Table
(Cur_Msg
).Sfile
< Errors
.Table
(Next_Msg
).Sfile
;
1051 if Errors
.Table
(Cur_Msg
).Sfile
= Errors
.Table
(Next_Msg
).Sfile
1053 exit when Sptr
< Errors
.Table
(Next_Msg
).Sptr
1054 or else (Sptr
= Errors
.Table
(Next_Msg
).Sptr
1055 and then Optr
< Errors
.Table
(Next_Msg
).Optr
);
1058 Prev_Msg
:= Next_Msg
;
1059 Next_Msg
:= Errors
.Table
(Next_Msg
).Next
;
1063 -- Now we insert the new message in the error chain. The insertion
1064 -- point for the message is after Prev_Msg and before Next_Msg.
1066 -- The possible insertion point for the new message is after Prev_Msg
1067 -- and before Next_Msg. However, this is where we do a special check
1068 -- for redundant parsing messages, defined as messages posted on the
1069 -- same line. The idea here is that probably such messages are junk
1070 -- from the parser recovering. In full errors mode, we don't do this
1071 -- deletion, but otherwise such messages are discarded at this stage.
1073 if Prev_Msg
/= No_Error_Msg
1074 and then Errors
.Table
(Prev_Msg
).Line
=
1075 Errors
.Table
(Cur_Msg
).Line
1076 and then Errors
.Table
(Prev_Msg
).Sfile
=
1077 Errors
.Table
(Cur_Msg
).Sfile
1078 and then Compiler_State
= Parsing
1079 and then not All_Errors_Mode
1081 -- Don't delete unconditional messages and at this stage, don't
1082 -- delete continuation lines (we attempted to delete those earlier
1083 -- if the parent message was deleted.
1085 if not Errors
.Table
(Cur_Msg
).Uncond
1086 and then not Continuation
1088 -- Don't delete if prev msg is warning and new msg is an error.
1089 -- This is because we don't want a real error masked by a
1090 -- warning. In all other cases (that is parse errors for the
1091 -- same line that are not unconditional) we do delete the
1092 -- message. This helps to avoid junk extra messages from
1093 -- cascaded parsing errors
1095 if not (Errors
.Table
(Prev_Msg
).Warn
1097 Errors
.Table
(Prev_Msg
).Style
)
1099 (Errors
.Table
(Cur_Msg
).Warn
1101 Errors
.Table
(Cur_Msg
).Style
)
1103 -- All tests passed, delete the message by simply returning
1104 -- without any further processing.
1106 if not Continuation
then
1107 Last_Killed
:= True;
1115 -- Come here if message is to be inserted in the error chain
1117 if not Continuation
then
1118 Last_Killed
:= False;
1121 if Prev_Msg
= No_Error_Msg
then
1122 First_Error_Msg
:= Cur_Msg
;
1124 Errors
.Table
(Prev_Msg
).Next
:= Cur_Msg
;
1127 Errors
.Table
(Cur_Msg
).Next
:= Next_Msg
;
1129 if Next_Msg
= No_Error_Msg
then
1130 Last_Error_Msg
:= Cur_Msg
;
1134 -- Bump appropriate statistics count
1136 if Errors
.Table
(Cur_Msg
).Warn
or else Errors
.Table
(Cur_Msg
).Style
then
1137 Warnings_Detected
:= Warnings_Detected
+ 1;
1139 if Errors
.Table
(Cur_Msg
).Info
then
1140 Info_Messages
:= Info_Messages
+ 1;
1144 Total_Errors_Detected
:= Total_Errors_Detected
+ 1;
1146 if Errors
.Table
(Cur_Msg
).Serious
then
1147 Serious_Errors_Detected
:= Serious_Errors_Detected
+ 1;
1148 Handle_Serious_Error
;
1152 -- Record warning message issued
1154 if Errors
.Table
(Cur_Msg
).Warn
1155 and then not Errors
.Table
(Cur_Msg
).Msg_Cont
1157 Warning_Msg
:= Cur_Msg
;
1160 -- If too many warnings turn off warnings
1162 if Maximum_Messages
/= 0 then
1163 if Warnings_Detected
= Maximum_Messages
then
1164 Warning_Mode
:= Suppress
;
1167 -- If too many errors abandon compilation
1169 if Total_Errors_Detected
= Maximum_Messages
then
1170 raise Unrecoverable_Error
;
1173 end Error_Msg_Internal
;
1179 procedure Error_Msg_N
(Msg
: String; N
: Node_Or_Entity_Id
) is
1181 Error_Msg_NEL
(Msg
, N
, N
, Sloc
(N
));
1188 procedure Error_Msg_NE
1190 N
: Node_Or_Entity_Id
;
1191 E
: Node_Or_Entity_Id
)
1194 Error_Msg_NEL
(Msg
, N
, E
, Sloc
(N
));
1201 procedure Error_Msg_NEL
1203 N
: Node_Or_Entity_Id
;
1204 E
: Node_Or_Entity_Id
;
1205 Flag_Location
: Source_Ptr
)
1208 if Special_Msg_Delete
(Msg
, N
, E
) then
1212 Prescan_Message
(Msg
);
1214 -- Special handling for warning messages
1216 if Is_Warning_Msg
then
1218 -- Suppress if no warnings set for either entity or node
1220 if No_Warnings
(N
) or else No_Warnings
(E
) then
1222 -- Disable any continuation messages as well
1224 Last_Killed
:= True;
1228 -- Suppress if inside loop that is known to be null or is probably
1229 -- null (case where loop executes only if invalid values present).
1230 -- In either case warnings in the loop are likely to be junk.
1237 while Present
(P
) loop
1238 if Nkind
(P
) = N_Loop_Statement
1239 and then Suppress_Loop_Warnings
(P
)
1249 -- Test for message to be output
1252 or else Is_Unconditional_Msg
1253 or else Is_Warning_Msg
1255 or else (Msg
(Msg
'First) = '\' and then not Last_Killed
)
1258 Error_Msg_Node_1
:= E
;
1259 Error_Msg
(Msg
, Flag_Location
);
1262 Last_Killed
:= True;
1265 if not (Is_Warning_Msg
or Is_Style_Msg
) then
1274 procedure Error_Msg_NW
1277 N
: Node_Or_Entity_Id
)
1281 and then In_Extended_Main_Source_Unit
(N
)
1282 and then Comes_From_Source
(N
)
1284 Error_Msg_NEL
(Msg
, N
, N
, Sloc
(N
));
1292 procedure Error_Msg_S
(Msg
: String) is
1294 Error_Msg
(Msg
, Scan_Ptr
);
1301 procedure Error_Msg_SC
(Msg
: String) is
1303 -- If we are at end of file, post the flag after the previous token
1305 if Token
= Tok_EOF
then
1308 -- For all other cases the message is posted at the current token
1312 Error_Msg
(Msg
, Token_Ptr
);
1320 procedure Error_Msg_SP
(Msg
: String) is
1322 -- Note: in the case where there is no previous token, Prev_Token_Ptr
1323 -- is set to Source_First, which is a reasonable position for the
1324 -- error flag in this situation
1326 Error_Msg
(Msg
, Prev_Token_Ptr
);
1333 procedure Finalize
(Last_Call
: Boolean) is
1338 procedure Delete_Warning
(E
: Error_Msg_Id
);
1339 -- Delete a warning msg if not already deleted and adjust warning count
1341 --------------------
1342 -- Delete_Warning --
1343 --------------------
1345 procedure Delete_Warning
(E
: Error_Msg_Id
) is
1347 if not Errors
.Table
(E
).Deleted
then
1348 Errors
.Table
(E
).Deleted
:= True;
1349 Warnings_Detected
:= Warnings_Detected
- 1;
1351 if Errors
.Table
(E
).Info
then
1352 Info_Messages
:= Info_Messages
- 1;
1355 if Errors
.Table
(E
).Warn_Err
then
1356 Warnings_Treated_As_Errors
:= Warnings_Treated_As_Errors
- 1;
1361 -- Start of processing for Finalize
1364 -- Set Prev pointers
1366 Cur
:= First_Error_Msg
;
1367 while Cur
/= No_Error_Msg
loop
1368 Nxt
:= Errors
.Table
(Cur
).Next
;
1369 exit when Nxt
= No_Error_Msg
;
1370 Errors
.Table
(Nxt
).Prev
:= Cur
;
1374 -- Eliminate any duplicated error messages from the list. This is
1375 -- done after the fact to avoid problems with Change_Error_Text.
1377 Cur
:= First_Error_Msg
;
1378 while Cur
/= No_Error_Msg
loop
1379 Nxt
:= Errors
.Table
(Cur
).Next
;
1382 while F
/= No_Error_Msg
1383 and then Errors
.Table
(F
).Sptr
= Errors
.Table
(Cur
).Sptr
1385 Check_Duplicate_Message
(Cur
, F
);
1386 F
:= Errors
.Table
(F
).Next
;
1392 -- Mark any messages suppressed by specific warnings as Deleted
1394 Cur
:= First_Error_Msg
;
1395 while Cur
/= No_Error_Msg
loop
1397 CE
: Error_Msg_Object
renames Errors
.Table
(Cur
);
1398 Tag
: constant String := Get_Warning_Tag
(Cur
);
1401 if (CE
.Warn
and not CE
.Deleted
)
1403 (Warning_Specifically_Suppressed
(CE
.Sptr
, CE
.Text
, Tag
) /=
1406 Warning_Specifically_Suppressed
(CE
.Optr
, CE
.Text
, Tag
) /=
1409 Delete_Warning
(Cur
);
1411 -- If this is a continuation, delete previous parts of message
1414 while Errors
.Table
(F
).Msg_Cont
loop
1415 F
:= Errors
.Table
(F
).Prev
;
1416 exit when F
= No_Error_Msg
;
1420 -- Delete any following continuations
1424 F
:= Errors
.Table
(F
).Next
;
1425 exit when F
= No_Error_Msg
;
1426 exit when not Errors
.Table
(F
).Msg_Cont
;
1432 Cur
:= Errors
.Table
(Cur
).Next
;
1435 Finalize_Called
:= True;
1437 -- Check consistency of specific warnings (may add warnings). We only
1438 -- do this on the last call, after all possible warnings are posted.
1441 Validate_Specific_Warnings
(Error_Msg
'Access);
1449 function First_Node
(C
: Node_Id
) return Node_Id
is
1450 Orig
: constant Node_Id
:= Original_Node
(C
);
1451 Loc
: constant Source_Ptr
:= Sloc
(Orig
);
1452 Sfile
: constant Source_File_Index
:= Get_Source_File_Index
(Loc
);
1456 function Test_Earlier
(N
: Node_Id
) return Traverse_Result
;
1457 -- Function applied to every node in the construct
1459 procedure Search_Tree_First
is new Traverse_Proc
(Test_Earlier
);
1460 -- Create traversal procedure
1466 function Test_Earlier
(N
: Node_Id
) return Traverse_Result
is
1467 Norig
: constant Node_Id
:= Original_Node
(N
);
1468 Loc
: constant Source_Ptr
:= Sloc
(Norig
);
1471 -- Check for earlier
1475 -- Ignore nodes with no useful location information
1477 and then Loc
/= Standard_Location
1478 and then Loc
/= No_Location
1480 -- Ignore nodes from a different file. This ensures against cases
1481 -- of strange foreign code somehow being present. We don't want
1482 -- wild placement of messages if that happens.
1484 and then Get_Source_File_Index
(Loc
) = Sfile
1493 -- Start of processing for First_Node
1496 if Nkind
(Orig
) in N_Subexpr
then
1499 Search_Tree_First
(Orig
);
1511 function First_Sloc
(N
: Node_Id
) return Source_Ptr
is
1512 SI
: constant Source_File_Index
:= Source_Index
(Get_Source_Unit
(N
));
1513 SF
: constant Source_Ptr
:= Source_First
(SI
);
1518 F
:= First_Node
(N
);
1521 -- The following circuit is a bit subtle. When we have parenthesized
1522 -- expressions, then the Sloc will not record the location of the paren,
1523 -- but we would like to post the flag on the paren. So what we do is to
1524 -- crawl up the tree from the First_Node, adjusting the Sloc value for
1525 -- any parentheses we know are present. Yes, we know this circuit is not
1526 -- 100% reliable (e.g. because we don't record all possible paren level
1527 -- values), but this is only for an error message so it is good enough.
1530 Paren_Loop
: for J
in 1 .. Paren_Count
(F
) loop
1532 -- We don't look more than 12 characters behind the current
1533 -- location, and in any case not past the front of the source.
1535 Search_Loop
: for K
in 1 .. 12 loop
1536 exit Search_Loop
when S
= SF
;
1538 if Source_Text
(SI
) (S
- 1) = '(' then
1542 elsif Source_Text
(SI
) (S
- 1) <= ' ' then
1548 end loop Search_Loop
;
1549 end loop Paren_Loop
;
1551 exit Node_Loop
when F
= N
;
1553 exit Node_Loop
when Nkind
(F
) not in N_Subexpr
;
1559 -----------------------
1560 -- Get_Ignore_Errors --
1561 -----------------------
1563 function Get_Ignore_Errors
return Boolean is
1565 return Errors_Must_Be_Ignored
;
1566 end Get_Ignore_Errors
;
1572 procedure Initialize
is
1575 First_Error_Msg
:= No_Error_Msg
;
1576 Last_Error_Msg
:= No_Error_Msg
;
1577 Serious_Errors_Detected
:= 0;
1578 Total_Errors_Detected
:= 0;
1579 Warnings_Treated_As_Errors
:= 0;
1580 Warnings_Detected
:= 0;
1582 Warnings_As_Errors_Count
:= 0;
1583 Cur_Msg
:= No_Error_Msg
;
1586 -- Initialize warnings tables
1589 Specific_Warnings
.Init
;
1596 function No_Warnings
(N
: Node_Or_Entity_Id
) return Boolean is
1598 if Error_Posted
(N
) then
1601 elsif Nkind
(N
) in N_Entity
and then Has_Warnings_Off
(N
) then
1604 elsif Is_Entity_Name
(N
)
1605 and then Present
(Entity
(N
))
1606 and then Has_Warnings_Off
(Entity
(N
))
1619 function OK_Node
(N
: Node_Id
) return Boolean is
1620 K
: constant Node_Kind
:= Nkind
(N
);
1623 if Error_Posted
(N
) then
1626 elsif K
in N_Has_Etype
1627 and then Present
(Etype
(N
))
1628 and then Error_Posted
(Etype
(N
))
1633 or else K
= N_Attribute_Reference
1634 or else K
= N_Character_Literal
1635 or else K
= N_Expanded_Name
1636 or else K
= N_Identifier
1637 or else K
= N_Operator_Symbol
)
1638 and then Present
(Entity
(N
))
1639 and then Error_Posted
(Entity
(N
))
1647 ---------------------
1648 -- Output_Messages --
1649 ---------------------
1651 procedure Output_Messages
is
1655 procedure Write_Error_Summary
;
1656 -- Write error summary
1658 procedure Write_Header
(Sfile
: Source_File_Index
);
1659 -- Write header line (compiling or checking given file)
1661 procedure Write_Max_Errors
;
1662 -- Write message if max errors reached
1664 -------------------------
1665 -- Write_Error_Summary --
1666 -------------------------
1668 procedure Write_Error_Summary
is
1670 -- Extra blank line if error messages or source listing were output
1672 if Total_Errors_Detected
+ Warnings_Detected
> 0 or else Full_List
1677 -- Message giving number of lines read and number of errors detected.
1678 -- This normally goes to Standard_Output. The exception is when brief
1679 -- mode is not set, verbose mode (or full list mode) is set, and
1680 -- there are errors. In this case we send the message to standard
1681 -- error to make sure that *something* appears on standard error
1682 -- in an error situation.
1684 if Total_Errors_Detected
+ Warnings_Detected
/= 0
1685 and then not Brief_Output
1686 and then (Verbose_Mode
or Full_List
)
1691 -- Message giving total number of lines. Don't give this message if
1692 -- the Main_Source line is unknown (this happens in error situations,
1693 -- e.g. when integrated preprocessing fails).
1695 if Main_Source_File
/= No_Source_File
then
1697 Write_Int
(Num_Source_Lines
(Main_Source_File
));
1699 if Num_Source_Lines
(Main_Source_File
) = 1 then
1700 Write_Str
(" line: ");
1702 Write_Str
(" lines: ");
1706 if Total_Errors_Detected
= 0 then
1707 Write_Str
("No errors");
1709 elsif Total_Errors_Detected
= 1 then
1710 Write_Str
("1 error");
1713 Write_Int
(Total_Errors_Detected
);
1714 Write_Str
(" errors");
1717 if Warnings_Detected
- Info_Messages
/= 0 then
1719 Write_Int
(Warnings_Detected
);
1720 Write_Str
(" warning");
1722 if Warnings_Detected
- Info_Messages
/= 1 then
1726 if Warning_Mode
= Treat_As_Error
then
1727 Write_Str
(" (treated as error");
1729 if Warnings_Detected
/= 1 then
1735 elsif Warnings_Treated_As_Errors
/= 0 then
1737 Write_Int
(Warnings_Treated_As_Errors
);
1738 Write_Str
(" treated as errors)");
1742 if Info_Messages
/= 0 then
1744 Write_Int
(Info_Messages
);
1745 Write_Str
(" info message");
1747 if Info_Messages
> 1 then
1753 Set_Standard_Output
;
1754 end Write_Error_Summary
;
1760 procedure Write_Header
(Sfile
: Source_File_Index
) is
1762 if Verbose_Mode
or Full_List
then
1763 if Original_Operating_Mode
= Generate_Code
then
1764 Write_Str
("Compiling: ");
1766 Write_Str
("Checking: ");
1769 Write_Name
(Full_File_Name
(Sfile
));
1771 if not Debug_Flag_7
then
1773 Write_Str
("Source file time stamp: ");
1774 Write_Time_Stamp
(Sfile
);
1776 Write_Str
("Compiled at: " & Compilation_Time
);
1783 ----------------------
1784 -- Write_Max_Errors --
1785 ----------------------
1787 procedure Write_Max_Errors
is
1789 if Maximum_Messages
/= 0 then
1790 if Warnings_Detected
>= Maximum_Messages
then
1792 Write_Line
("maximum number of warnings output");
1793 Write_Line
("any further warnings suppressed");
1794 Set_Standard_Output
;
1797 -- If too many errors print message
1799 if Total_Errors_Detected
>= Maximum_Messages
then
1801 Write_Line
("fatal error: maximum number of errors detected");
1802 Set_Standard_Output
;
1805 end Write_Max_Errors
;
1807 -- Start of processing for Output_Messages
1810 -- Error if Finalize has not been called
1812 if not Finalize_Called
then
1813 raise Program_Error
;
1816 -- Reset current error source file if the main unit has a pragma
1817 -- Source_Reference. This ensures outputting the proper name of
1818 -- the source file in this situation.
1820 if Main_Source_File
= No_Source_File
1821 or else Num_SRef_Pragmas
(Main_Source_File
) /= 0
1823 Current_Error_Source_File
:= No_Source_File
;
1828 if Brief_Output
or (not Full_List
and not Verbose_Mode
) then
1831 E
:= First_Error_Msg
;
1832 while E
/= No_Error_Msg
loop
1833 if not Errors
.Table
(E
).Deleted
and then not Debug_Flag_KK
then
1834 if Full_Path_Name_For_Brief_Errors
then
1835 Write_Name
(Full_Ref_Name
(Errors
.Table
(E
).Sfile
));
1837 Write_Name
(Reference_Name
(Errors
.Table
(E
).Sfile
));
1841 Write_Int
(Int
(Physical_To_Logical
1842 (Errors
.Table
(E
).Line
,
1843 Errors
.Table
(E
).Sfile
)));
1846 if Errors
.Table
(E
).Col
< 10 then
1850 Write_Int
(Int
(Errors
.Table
(E
).Col
));
1852 Output_Msg_Text
(E
);
1856 E
:= Errors
.Table
(E
).Next
;
1859 Set_Standard_Output
;
1862 -- Full source listing case
1865 List_Pragmas_Index
:= 1;
1866 List_Pragmas_Mode
:= True;
1867 E
:= First_Error_Msg
;
1869 -- Normal case, to stdout (copyright notice already output)
1871 if Full_List_File_Name
= null then
1872 if not Debug_Flag_7
then
1879 Create_List_File_Access
.all (Full_List_File_Name
.all);
1880 Set_Special_Output
(Write_List_Info_Access
.all'Access);
1882 -- Write copyright notice to file
1884 if not Debug_Flag_7
then
1885 Write_Str
("GNAT ");
1886 Write_Str
(Gnat_Version_String
);
1888 Write_Str
("Copyright 1992-" &
1890 ", Free Software Foundation, Inc.");
1895 -- First list extended main source file units with errors
1897 for U
in Main_Unit
.. Last_Unit
loop
1898 if In_Extended_Main_Source_Unit
(Cunit_Entity
(U
))
1900 -- If debug flag d.m is set, only the main source is listed
1902 and then (U
= Main_Unit
or else not Debug_Flag_Dot_M
)
1904 -- If the unit of the entity does not come from source, it is
1905 -- an implicit subprogram declaration for a child subprogram.
1906 -- Do not emit errors for it, they are listed with the body.
1909 (No
(Cunit_Entity
(U
))
1910 or else Comes_From_Source
(Cunit_Entity
(U
))
1911 or else not Is_Subprogram
(Cunit_Entity
(U
)))
1913 -- If the compilation unit associated with this unit does not
1914 -- come from source, it means it is an instantiation that should
1915 -- not be included in the source listing.
1917 and then Comes_From_Source
(Cunit
(U
))
1920 Sfile
: constant Source_File_Index
:= Source_Index
(U
);
1925 -- Only write the header if Sfile is known
1927 if Sfile
/= No_Source_File
then
1928 Write_Header
(Sfile
);
1932 -- Normally, we don't want an "error messages from file"
1933 -- message when listing the entire file, so we set the
1934 -- current source file as the current error source file.
1935 -- However, the old style of doing things was to list this
1936 -- message if pragma Source_Reference is present, even for
1937 -- the main unit. Since the purpose of the -gnatd.m switch
1938 -- is to duplicate the old behavior, we skip the reset if
1939 -- this debug flag is set.
1941 if not Debug_Flag_Dot_M
then
1942 Current_Error_Source_File
:= Sfile
;
1945 -- Only output the listing if Sfile is known, to avoid
1946 -- crashing the compiler.
1948 if Sfile
/= No_Source_File
then
1949 for N
in 1 .. Last_Source_Line
(Sfile
) loop
1950 while E
/= No_Error_Msg
1951 and then Errors
.Table
(E
).Deleted
1953 E
:= Errors
.Table
(E
).Next
;
1958 and then Errors
.Table
(E
).Line
= N
1959 and then Errors
.Table
(E
).Sfile
= Sfile
;
1961 Output_Source_Line
(N
, Sfile
, Err_Flag
);
1964 Output_Error_Msgs
(E
);
1966 if not Debug_Flag_2
then
1976 -- Then output errors, if any, for subsidiary units not in the
1977 -- main extended unit.
1979 -- Note: if debug flag d.m set, include errors for any units other
1980 -- than the main unit in the extended source unit (e.g. spec and
1981 -- subunits for a body).
1983 while E
/= No_Error_Msg
1984 and then (not In_Extended_Main_Source_Unit
(Errors
.Table
(E
).Sptr
)
1987 and then Get_Source_Unit
1988 (Errors
.Table
(E
).Sptr
) /= Main_Unit
))
1990 if Errors
.Table
(E
).Deleted
then
1991 E
:= Errors
.Table
(E
).Next
;
1996 (Errors
.Table
(E
).Line
, Errors
.Table
(E
).Sfile
, True);
1997 Output_Error_Msgs
(E
);
2001 -- If output to file, write extra copy of error summary to the
2002 -- output file, and then close it.
2004 if Full_List_File_Name
/= null then
2005 Write_Error_Summary
;
2007 Close_List_File_Access
.all;
2008 Cancel_Special_Output
;
2012 -- Verbose mode (error lines only with error flags). Normally this is
2013 -- ignored in full list mode, unless we are listing to a file, in which
2014 -- case we still generate -gnatv output to standard output.
2017 and then (not Full_List
or else Full_List_File_Name
/= null)
2021 -- Output the header only when Main_Source_File is known
2023 if Main_Source_File
/= No_Source_File
then
2024 Write_Header
(Main_Source_File
);
2027 E
:= First_Error_Msg
;
2029 -- Loop through error lines
2031 while E
/= No_Error_Msg
loop
2032 if Errors
.Table
(E
).Deleted
then
2033 E
:= Errors
.Table
(E
).Next
;
2037 (Errors
.Table
(E
).Line
, Errors
.Table
(E
).Sfile
, True);
2038 Output_Error_Msgs
(E
);
2043 -- Output error summary if verbose or full list mode
2045 if Verbose_Mode
or else Full_List
then
2046 Write_Error_Summary
;
2051 if Warning_Mode
= Treat_As_Error
then
2052 Total_Errors_Detected
:=
2053 Total_Errors_Detected
+ Warnings_Detected
- Info_Messages
;
2054 Warnings_Detected
:= Info_Messages
;
2056 end Output_Messages
;
2058 ------------------------
2059 -- Output_Source_Line --
2060 ------------------------
2062 procedure Output_Source_Line
2063 (L
: Physical_Line_Number
;
2064 Sfile
: Source_File_Index
;
2070 Line_Number_Output
: Boolean := False;
2071 -- Set True once line number is output
2073 Empty_Line
: Boolean := True;
2074 -- Set False if line includes at least one character
2077 if Sfile
/= Current_Error_Source_File
then
2078 Write_Str
("==============Error messages for ");
2080 case Sinput
.File_Type
(Sfile
) is
2082 Write_Str
("source");
2084 when Sinput
.Config
=>
2085 Write_Str
("configuration pragmas");
2088 Write_Str
("symbol definition");
2090 when Sinput
.Preproc
=>
2091 Write_Str
("preprocessing data");
2094 Write_Str
(" file: ");
2095 Write_Name
(Full_File_Name
(Sfile
));
2098 if Num_SRef_Pragmas
(Sfile
) > 0 then
2099 Write_Str
("--------------Line numbers from file: ");
2100 Write_Name
(Full_Ref_Name
(Sfile
));
2101 Write_Str
(" (starting at line ");
2102 Write_Int
(Int
(First_Mapped_Line
(Sfile
)));
2107 Current_Error_Source_File
:= Sfile
;
2110 if Errs
or List_Pragmas_Mode
then
2111 Output_Line_Number
(Physical_To_Logical
(L
, Sfile
));
2112 Line_Number_Output
:= True;
2115 S
:= Line_Start
(L
, Sfile
);
2118 C
:= Source_Text
(Sfile
) (S
);
2119 exit when C
= ASCII
.LF
or else C
= ASCII
.CR
or else C
= EOF
;
2121 -- Deal with matching entry in List_Pragmas table
2124 and then List_Pragmas_Index
<= List_Pragmas
.Last
2125 and then S
= List_Pragmas
.Table
(List_Pragmas_Index
).Ploc
2127 case List_Pragmas
.Table
(List_Pragmas_Index
).Ptyp
is
2131 -- Ignore if on line with errors so that error flags
2132 -- get properly listed with the error line .
2135 Write_Char
(ASCII
.FF
);
2139 List_Pragmas_Mode
:= True;
2141 if not Line_Number_Output
then
2142 Output_Line_Number
(Physical_To_Logical
(L
, Sfile
));
2143 Line_Number_Output
:= True;
2150 List_Pragmas_Mode
:= False;
2153 List_Pragmas_Index
:= List_Pragmas_Index
+ 1;
2155 -- Normal case (no matching entry in List_Pragmas table)
2158 if Errs
or List_Pragmas_Mode
then
2163 Empty_Line
:= False;
2167 -- If we have output a source line, then add the line terminator, with
2168 -- training spaces preserved (so we output the line exactly as input).
2170 if Line_Number_Output
then
2174 Write_Eol_Keep_Blanks
;
2177 end Output_Source_Line
;
2179 -----------------------------
2180 -- Remove_Warning_Messages --
2181 -----------------------------
2183 procedure Remove_Warning_Messages
(N
: Node_Id
) is
2185 function Check_For_Warning
(N
: Node_Id
) return Traverse_Result
;
2186 -- This function checks one node for a possible warning message
2188 function Check_All_Warnings
is new Traverse_Func
(Check_For_Warning
);
2189 -- This defines the traversal operation
2191 -----------------------
2192 -- Check_For_Warning --
2193 -----------------------
2195 function Check_For_Warning
(N
: Node_Id
) return Traverse_Result
is
2196 Loc
: constant Source_Ptr
:= Sloc
(N
);
2199 function To_Be_Removed
(E
: Error_Msg_Id
) return Boolean;
2200 -- Returns True for a message that is to be removed. Also adjusts
2201 -- warning count appropriately.
2207 function To_Be_Removed
(E
: Error_Msg_Id
) return Boolean is
2209 if E
/= No_Error_Msg
2211 -- Don't remove if location does not match
2213 and then Errors
.Table
(E
).Optr
= Loc
2215 -- Don't remove if not warning/info message. Note that we do
2216 -- not remove style messages here. They are warning messages
2217 -- but not ones we want removed in this context.
2219 and then Errors
.Table
(E
).Warn
2221 -- Don't remove unconditional messages
2223 and then not Errors
.Table
(E
).Uncond
2225 Warnings_Detected
:= Warnings_Detected
- 1;
2227 if Errors
.Table
(E
).Info
then
2228 Info_Messages
:= Info_Messages
- 1;
2233 -- No removal required
2240 -- Start of processing for Check_For_Warnings
2243 while To_Be_Removed
(First_Error_Msg
) loop
2244 First_Error_Msg
:= Errors
.Table
(First_Error_Msg
).Next
;
2247 if First_Error_Msg
= No_Error_Msg
then
2248 Last_Error_Msg
:= No_Error_Msg
;
2251 E
:= First_Error_Msg
;
2252 while E
/= No_Error_Msg
loop
2253 while To_Be_Removed
(Errors
.Table
(E
).Next
) loop
2254 Errors
.Table
(E
).Next
:=
2255 Errors
.Table
(Errors
.Table
(E
).Next
).Next
;
2257 if Errors
.Table
(E
).Next
= No_Error_Msg
then
2258 Last_Error_Msg
:= E
;
2262 E
:= Errors
.Table
(E
).Next
;
2265 if Nkind
(N
) = N_Raise_Constraint_Error
2266 and then Original_Node
(N
) /= N
2267 and then No
(Condition
(N
))
2269 -- Warnings may have been posted on subexpressions of the original
2270 -- tree. We place the original node back on the tree to remove
2271 -- those warnings, whose sloc do not match those of any node in
2272 -- the current tree. Given that we are in unreachable code, this
2273 -- modification to the tree is harmless.
2276 Status
: Traverse_Final_Result
;
2279 if Is_List_Member
(N
) then
2280 Set_Condition
(N
, Original_Node
(N
));
2281 Status
:= Check_All_Warnings
(Condition
(N
));
2283 Rewrite
(N
, Original_Node
(N
));
2284 Status
:= Check_All_Warnings
(N
);
2293 end Check_For_Warning
;
2295 -- Start of processing for Remove_Warning_Messages
2298 if Warnings_Detected
/= 0 then
2300 Discard
: Traverse_Final_Result
;
2301 pragma Warnings
(Off
, Discard
);
2304 Discard
:= Check_All_Warnings
(N
);
2307 end Remove_Warning_Messages
;
2309 procedure Remove_Warning_Messages
(L
: List_Id
) is
2312 if Is_Non_Empty_List
(L
) then
2314 while Present
(Stat
) loop
2315 Remove_Warning_Messages
(Stat
);
2319 end Remove_Warning_Messages
;
2321 ---------------------------
2322 -- Set_Identifier_Casing --
2323 ---------------------------
2325 procedure Set_Identifier_Casing
2326 (Identifier_Name
: System
.Address
;
2327 File_Name
: System
.Address
)
2329 Ident
: constant Big_String_Ptr
:= To_Big_String_Ptr
(Identifier_Name
);
2330 File
: constant Big_String_Ptr
:= To_Big_String_Ptr
(File_Name
);
2333 Desired_Case
: Casing_Type
:= Mixed_Case
;
2334 -- Casing required for result. Default value of Mixed_Case is used if
2335 -- for some reason we cannot find the right file name in the table.
2338 -- Get length of file name
2341 while File
(Flen
+ 1) /= ASCII
.NUL
loop
2345 -- Loop through file names to find matching one. This is a bit slow, but
2346 -- we only do it in error situations so it is not so terrible. Note that
2347 -- if the loop does not exit, then the desired case will be left set to
2348 -- Mixed_Case, this can happen if the name was not in canonical form.
2350 for J
in 1 .. Last_Source_File
loop
2351 Get_Name_String
(Full_Debug_Name
(J
));
2354 and then Name_Buffer
(1 .. Name_Len
) = String (File
(1 .. Flen
))
2356 Desired_Case
:= Identifier_Casing
(J
);
2361 -- Copy identifier as given to Name_Buffer
2363 for J
in Name_Buffer
'Range loop
2364 Name_Buffer
(J
) := Ident
(J
);
2366 if Name_Buffer
(J
) = ASCII
.NUL
then
2372 Set_Casing
(Desired_Case
);
2373 end Set_Identifier_Casing
;
2375 -----------------------
2376 -- Set_Ignore_Errors --
2377 -----------------------
2379 procedure Set_Ignore_Errors
(To
: Boolean) is
2381 Errors_Must_Be_Ignored
:= To
;
2382 end Set_Ignore_Errors
;
2384 ------------------------------
2385 -- Set_Msg_Insertion_Column --
2386 ------------------------------
2388 procedure Set_Msg_Insertion_Column
is
2390 if RM_Column_Check
then
2391 Set_Msg_Str
(" in column ");
2392 Set_Msg_Int
(Int
(Error_Msg_Col
) + 1);
2394 end Set_Msg_Insertion_Column
;
2396 ----------------------------
2397 -- Set_Msg_Insertion_Node --
2398 ----------------------------
2400 procedure Set_Msg_Insertion_Node
is
2405 Error_Msg_Node_1
= Error
2406 or else Error_Msg_Node_1
= Any_Type
;
2408 if Error_Msg_Node_1
= Empty
then
2409 Set_Msg_Blank_Conditional
;
2410 Set_Msg_Str
("<empty>");
2412 elsif Error_Msg_Node_1
= Error
then
2414 Set_Msg_Str
("<error>");
2416 elsif Error_Msg_Node_1
= Standard_Void_Type
then
2418 Set_Msg_Str
("procedure name");
2420 elsif Nkind
(Error_Msg_Node_1
) in N_Entity
2421 and then Ekind
(Error_Msg_Node_1
) = E_Anonymous_Access_Subprogram_Type
2424 Set_Msg_Str
("access to subprogram");
2427 Set_Msg_Blank_Conditional
;
2431 K
:= Nkind
(Error_Msg_Node_1
);
2433 -- If we have operator case, skip quotes since name of operator
2434 -- itself will supply the required quotations. An operator can be an
2435 -- applied use in an expression or an explicit operator symbol, or an
2436 -- identifier whose name indicates it is an operator.
2439 or else K
= N_Operator_Symbol
2440 or else K
= N_Defining_Operator_Symbol
2441 or else ((K
= N_Identifier
or else K
= N_Defining_Identifier
)
2442 and then Is_Operator_Name
(Chars
(Error_Msg_Node_1
)))
2444 Set_Msg_Node
(Error_Msg_Node_1
);
2446 -- Normal case, not an operator, surround with quotes
2450 Set_Qualification
(Error_Msg_Qual_Level
, Error_Msg_Node_1
);
2451 Set_Msg_Node
(Error_Msg_Node_1
);
2456 -- The following assignment ensures that a second ampersand insertion
2457 -- character will correspond to the Error_Msg_Node_2 parameter. We
2458 -- suppress possible validity checks in case operating in -gnatVa mode,
2459 -- and Error_Msg_Node_2 is not needed and has not been set.
2462 pragma Suppress
(Range_Check
);
2464 Error_Msg_Node_1
:= Error_Msg_Node_2
;
2466 end Set_Msg_Insertion_Node
;
2468 --------------------------------------
2469 -- Set_Msg_Insertion_Type_Reference --
2470 --------------------------------------
2472 procedure Set_Msg_Insertion_Type_Reference
(Flag
: Source_Ptr
) is
2478 if Error_Msg_Node_1
= Standard_Void_Type
then
2479 Set_Msg_Str
("package or procedure name");
2482 elsif Error_Msg_Node_1
= Standard_Exception_Type
then
2483 Set_Msg_Str
("exception name");
2486 elsif Error_Msg_Node_1
= Any_Access
2487 or else Error_Msg_Node_1
= Any_Array
2488 or else Error_Msg_Node_1
= Any_Boolean
2489 or else Error_Msg_Node_1
= Any_Character
2490 or else Error_Msg_Node_1
= Any_Composite
2491 or else Error_Msg_Node_1
= Any_Discrete
2492 or else Error_Msg_Node_1
= Any_Fixed
2493 or else Error_Msg_Node_1
= Any_Integer
2494 or else Error_Msg_Node_1
= Any_Modular
2495 or else Error_Msg_Node_1
= Any_Numeric
2496 or else Error_Msg_Node_1
= Any_Real
2497 or else Error_Msg_Node_1
= Any_Scalar
2498 or else Error_Msg_Node_1
= Any_String
2500 Get_Unqualified_Decoded_Name_String
(Chars
(Error_Msg_Node_1
));
2501 Set_Msg_Name_Buffer
;
2504 elsif Error_Msg_Node_1
= Universal_Real
then
2505 Set_Msg_Str
("type universal real");
2508 elsif Error_Msg_Node_1
= Universal_Integer
then
2509 Set_Msg_Str
("type universal integer");
2512 elsif Error_Msg_Node_1
= Universal_Fixed
then
2513 Set_Msg_Str
("type universal fixed");
2517 -- Special case of anonymous array
2519 if Nkind
(Error_Msg_Node_1
) in N_Entity
2520 and then Is_Array_Type
(Error_Msg_Node_1
)
2521 and then Present
(Related_Array_Object
(Error_Msg_Node_1
))
2523 Set_Msg_Str
("type of ");
2524 Set_Msg_Node
(Related_Array_Object
(Error_Msg_Node_1
));
2525 Set_Msg_Str
(" declared");
2526 Set_Msg_Insertion_Line_Number
2527 (Sloc
(Related_Array_Object
(Error_Msg_Node_1
)), Flag
);
2531 -- If we fall through, it is not a special case, so first output
2532 -- the name of the type, preceded by private for a private type
2534 if Is_Private_Type
(Error_Msg_Node_1
) then
2535 Set_Msg_Str
("private type ");
2537 Set_Msg_Str
("type ");
2540 Ent
:= Error_Msg_Node_1
;
2542 if Is_Internal_Name
(Chars
(Ent
)) then
2543 Unwind_Internal_Type
(Ent
);
2546 -- Types in Standard are displayed as "Standard.name"
2548 if Sloc
(Ent
) <= Standard_Location
then
2550 Set_Msg_Str
("Standard.");
2555 -- Types in other language defined units are displayed as
2556 -- "package-name.type-name"
2559 Is_Predefined_File_Name
(Unit_File_Name
(Get_Source_Unit
(Ent
)))
2561 Get_Unqualified_Decoded_Name_String
2562 (Unit_Name
(Get_Source_Unit
(Ent
)));
2563 Name_Len
:= Name_Len
- 2;
2564 Set_Msg_Blank_Conditional
;
2566 Set_Casing
(Mixed_Case
);
2567 Set_Msg_Name_Buffer
;
2569 Set_Casing
(Mixed_Case
);
2574 -- All other types display as "type name" defined at line xxx
2575 -- possibly qualified if qualification is requested.
2579 Set_Qualification
(Error_Msg_Qual_Level
, Ent
);
2583 -- If we did not print a name (e.g. in the case of an anonymous
2584 -- subprogram type), there is no name to print, so remove quotes.
2586 if Buffer_Ends_With
('"') then
2587 Buffer_Remove
('"');
2593 -- If the original type did not come from a predefined file, add the
2594 -- location where the type was defined.
2596 if Sloc
(Error_Msg_Node_1
) > Standard_Location
2598 not Is_Predefined_File_Name
2599 (Unit_File_Name
(Get_Source_Unit
(Error_Msg_Node_1
)))
2601 Set_Msg_Str
(" defined");
2602 Set_Msg_Insertion_Line_Number
(Sloc
(Error_Msg_Node_1
), Flag
);
2604 -- If it did come from a predefined file, deal with the case where
2605 -- this was a file with a generic instantiation from elsewhere.
2608 if Sloc
(Error_Msg_Node_1
) > Standard_Location
then
2610 Iloc
: constant Source_Ptr
:=
2611 Instantiation_Location
(Sloc
(Error_Msg_Node_1
));
2614 if Iloc
/= No_Location
2615 and then not Suppress_Instance_Location
2617 Set_Msg_Str
(" from instance");
2618 Set_Msg_Insertion_Line_Number
(Iloc
, Flag
);
2623 end Set_Msg_Insertion_Type_Reference
;
2625 ---------------------------------
2626 -- Set_Msg_Insertion_Unit_Name --
2627 ---------------------------------
2629 procedure Set_Msg_Insertion_Unit_Name
(Suffix
: Boolean := True) is
2631 if Error_Msg_Unit_1
= No_Unit_Name
then
2634 elsif Error_Msg_Unit_1
= Error_Unit_Name
then
2636 Set_Msg_Str
("<error>");
2639 Get_Unit_Name_String
(Error_Msg_Unit_1
, Suffix
);
2642 Set_Msg_Name_Buffer
;
2646 -- The following assignment ensures that a second percent insertion
2647 -- character will correspond to the Error_Msg_Unit_2 parameter. We
2648 -- suppress possible validity checks in case operating in -gnatVa mode,
2649 -- and Error_Msg_Unit_2 is not needed and has not been set.
2652 pragma Suppress
(Range_Check
);
2654 Error_Msg_Unit_1
:= Error_Msg_Unit_2
;
2656 end Set_Msg_Insertion_Unit_Name
;
2662 procedure Set_Msg_Node
(Node
: Node_Id
) is
2667 case Nkind
(Node
) is
2668 when N_Designator
=>
2669 Set_Msg_Node
(Name
(Node
));
2671 Set_Msg_Node
(Identifier
(Node
));
2674 when N_Defining_Program_Unit_Name
=>
2675 Set_Msg_Node
(Name
(Node
));
2677 Set_Msg_Node
(Defining_Identifier
(Node
));
2680 when N_Selected_Component | N_Expanded_Name
=>
2681 Set_Msg_Node
(Prefix
(Node
));
2683 Set_Msg_Node
(Selector_Name
(Node
));
2690 -- The only remaining possibilities are identifiers, defining
2691 -- identifiers, pragmas, and pragma argument associations.
2693 if Nkind
(Node
) = N_Pragma
then
2694 Nam
:= Pragma_Name
(Node
);
2696 -- The other cases have Chars fields, and we want to test for possible
2697 -- internal names, which generally represent something gone wrong. An
2698 -- exception is the case of internal type names, where we try to find a
2699 -- reasonable external representation for the external name
2701 elsif Is_Internal_Name
(Chars
(Node
))
2703 ((Is_Entity_Name
(Node
)
2704 and then Present
(Entity
(Node
))
2705 and then Is_Type
(Entity
(Node
)))
2707 (Nkind
(Node
) = N_Defining_Identifier
and then Is_Type
(Node
)))
2709 if Nkind
(Node
) = N_Identifier
then
2710 Ent
:= Entity
(Node
);
2715 -- If the type is the designated type of an access_to_subprogram,
2716 -- then there is no name to provide in the call.
2718 if Ekind
(Ent
) = E_Subprogram_Type
then
2721 -- Otherwise, we will be able to find some kind of name to output
2724 Unwind_Internal_Type
(Ent
);
2728 -- If not internal name, just use name in Chars field
2731 Nam
:= Chars
(Node
);
2734 -- At this stage, the name to output is in Nam
2736 Get_Unqualified_Decoded_Name_String
(Nam
);
2738 -- Remove trailing upper case letters from the name (useful for
2739 -- dealing with some cases of internal names.
2741 while Name_Len
> 1 and then Name_Buffer
(Name_Len
) in 'A' .. 'Z' loop
2742 Name_Len
:= Name_Len
- 1;
2745 -- If we have any of the names from standard that start with the
2746 -- characters "any " (e.g. Any_Type), then kill the message since
2747 -- almost certainly it is a junk cascaded message.
2750 and then Name_Buffer
(1 .. 4) = "any "
2752 Kill_Message
:= True;
2755 -- Now we have to set the proper case. If we have a source location
2756 -- then do a check to see if the name in the source is the same name
2757 -- as the name in the Names table, except for possible differences
2758 -- in case, which is the case when we can copy from the source.
2761 Src_Loc
: constant Source_Ptr
:= Sloc
(Node
);
2762 Sbuffer
: Source_Buffer_Ptr
;
2764 Src_Ptr
: Source_Ptr
;
2770 -- For standard locations, always use mixed case
2772 if Src_Loc
<= No_Location
2773 or else Sloc
(Node
) <= No_Location
2775 Set_Casing
(Mixed_Case
);
2778 -- Determine if the reference we are dealing with corresponds to
2779 -- text at the point of the error reference. This will often be
2780 -- the case for simple identifier references, and is the case
2781 -- where we can copy the spelling from the source.
2783 Sbuffer
:= Source_Text
(Get_Source_File_Index
(Src_Loc
));
2785 while Ref_Ptr
<= Name_Len
loop
2787 Fold_Lower
(Sbuffer
(Src_Ptr
)) /=
2788 Fold_Lower
(Name_Buffer
(Ref_Ptr
));
2789 Ref_Ptr
:= Ref_Ptr
+ 1;
2790 Src_Ptr
:= Src_Ptr
+ 1;
2793 -- If we get through the loop without a mismatch, then output the
2794 -- name the way it is spelled in the source program
2796 if Ref_Ptr
> Name_Len
then
2799 for J
in 1 .. Name_Len
loop
2800 Name_Buffer
(J
) := Sbuffer
(Src_Ptr
);
2801 Src_Ptr
:= Src_Ptr
+ 1;
2804 -- Otherwise set the casing using the default identifier casing
2807 Set_Casing
(Identifier_Casing
(Flag_Source
), Mixed_Case
);
2812 Set_Msg_Name_Buffer
;
2820 procedure Set_Msg_Text
(Text
: String; Flag
: Source_Ptr
) is
2821 C
: Character; -- Current character
2822 P
: Natural; -- Current index;
2824 procedure Skip_Msg_Insertion_Warning
(C
: Character);
2825 -- Deal with ? ?? ?x? ?X? ?*? ?$? insertion sequences (and the same
2826 -- sequences using < instead of ?). The caller has already bumped
2827 -- the pointer past the initial ? or < and C is set to this initial
2828 -- character (? or <). This procedure skips past the rest of the
2829 -- sequence. We do not need to set Msg_Insertion_Char, since this
2830 -- was already done during the message prescan.
2832 --------------------------------
2833 -- Skip_Msg_Insertion_Warning --
2834 --------------------------------
2836 procedure Skip_Msg_Insertion_Warning
(C
: Character) is
2838 if P
<= Text
'Last and then Text
(P
) = C
then
2841 elsif P
+ 1 <= Text
'Last
2842 and then (Text
(P
) in 'a' .. 'z'
2844 Text
(P
) in 'A' .. 'Z'
2849 and then Text
(P
+ 1) = C
2853 end Skip_Msg_Insertion_Warning
;
2855 -- Start of processing for Set_Msg_Text
2858 Manual_Quote_Mode
:= False;
2860 Flag_Source
:= Get_Source_File_Index
(Flag
);
2862 -- Skip info: at start, we have recorded this in Is_Info_Msg, and this
2863 -- will be used (Info field in error message object) to put back the
2864 -- string when it is printed. We need to do this, or we get confused
2865 -- with instantiation continuations.
2868 and then Text
(Text
'First .. Text
'First + 5) = "info: "
2870 P
:= Text
'First + 6;
2875 -- Loop through characters of message
2877 while P
<= Text
'Last loop
2881 -- Check for insertion character or sequence
2885 if P
<= Text
'Last and then Text
(P
) = '%' then
2887 Set_Msg_Insertion_Name_Literal
;
2889 Set_Msg_Insertion_Name
;
2893 if P
<= Text
'Last and then Text
(P
) = '$' then
2895 Set_Msg_Insertion_Unit_Name
(Suffix
=> False);
2897 Set_Msg_Insertion_Unit_Name
;
2901 Set_Msg_Insertion_File_Name
;
2904 Set_Msg_Insertion_Type_Reference
(Flag
);
2907 Set_Msg_Insertion_Reserved_Name
;
2910 Set_Msg_Insertion_Node
;
2913 Set_Msg_Insertion_Line_Number
(Error_Msg_Sloc
, Flag
);
2916 Continuation
:= True;
2918 if Text
(P
) = '\' then
2919 Continuation_New_Line
:= True;
2924 Set_Msg_Insertion_Column
;
2927 Set_Msg_Insertion_Run_Time_Name
;
2930 Set_Msg_Insertion_Uint
;
2933 Manual_Quote_Mode
:= not Manual_Quote_Mode
;
2937 null; -- already dealt with
2940 Skip_Msg_Insertion_Warning
('?');
2943 Skip_Msg_Insertion_Warning
('<');
2946 null; -- already dealt with
2949 Set_Msg_Char
(Text
(P
));
2953 Set_Msg_Str
(Error_Msg_String
(1 .. Error_Msg_Strlen
));
2955 -- Upper case letter
2959 -- Start of reserved word if two or more
2961 if P
<= Text
'Last and then Text
(P
) in 'A' .. 'Z' then
2963 Set_Msg_Insertion_Reserved_Word
(Text
, P
);
2965 -- Single upper case letter is just inserted
2971 -- '[' (will be/would have been raised at run time)
2974 if Is_Warning_Msg
then
2975 Set_Msg_Str
("will be raised at run time");
2977 Set_Msg_Str
("would have been raised at run time");
2980 -- ']' (may be/might have been raised at run time)
2983 if Is_Warning_Msg
then
2984 Set_Msg_Str
("may be raised at run time");
2986 Set_Msg_Str
("might have been raised at run time");
2989 -- Normal character with no special treatment
3001 procedure Set_Posted
(N
: Node_Id
) is
3005 if Is_Serious_Error
then
3007 -- We always set Error_Posted on the node itself
3009 Set_Error_Posted
(N
);
3011 -- If it is a subexpression, then set Error_Posted on parents up to
3012 -- and including the first non-subexpression construct. This helps
3013 -- avoid cascaded error messages within a single expression.
3019 Set_Error_Posted
(P
);
3020 exit when Nkind
(P
) not in N_Subexpr
;
3023 if Nkind_In
(P
, N_Pragma_Argument_Association
,
3024 N_Component_Association
,
3025 N_Discriminant_Association
,
3026 N_Generic_Association
,
3027 N_Parameter_Association
)
3029 Set_Error_Posted
(Parent
(P
));
3032 -- A special check, if we just posted an error on an attribute
3033 -- definition clause, then also set the entity involved as posted.
3034 -- For example, this stops complaining about the alignment after
3035 -- complaining about the size, which is likely to be useless.
3037 if Nkind
(P
) = N_Attribute_Definition_Clause
then
3038 if Is_Entity_Name
(Name
(P
)) then
3039 Set_Error_Posted
(Entity
(Name
(P
)));
3045 -----------------------
3046 -- Set_Qualification --
3047 -----------------------
3049 procedure Set_Qualification
(N
: Nat
; E
: Entity_Id
) is
3051 if N
/= 0 and then Scope
(E
) /= Standard_Standard
then
3052 Set_Qualification
(N
- 1, Scope
(E
));
3053 Set_Msg_Node
(Scope
(E
));
3056 end Set_Qualification
;
3058 ------------------------
3059 -- Special_Msg_Delete --
3060 ------------------------
3062 -- Is it really right to have all this specialized knowledge in errout?
3064 function Special_Msg_Delete
3066 N
: Node_Or_Entity_Id
;
3067 E
: Node_Or_Entity_Id
) return Boolean
3070 -- Never delete messages in -gnatdO mode
3072 if Debug_Flag_OO
then
3075 -- Processing for "atomic access cannot be guaranteed"
3077 elsif Msg
= "atomic access to & cannot be guaranteed" then
3079 -- When an atomic object refers to a non-atomic type in the same
3080 -- scope, we implicitly make the type atomic. In the non-error case
3081 -- this is surely safe (and in fact prevents an error from occurring
3082 -- if the type is not atomic by default). But if the object cannot be
3083 -- made atomic, then we introduce an extra junk message by this
3084 -- manipulation, which we get rid of here.
3086 -- We identify this case by the fact that it references a type for
3087 -- which Is_Atomic is set, but there is no Atomic pragma setting it.
3090 and then Is_Atomic
(E
)
3091 and then No
(Get_Rep_Pragma
(E
, Name_Atomic
))
3096 -- Processing for "Size too small" messages
3098 elsif Msg
= "size for& too small, minimum allowed is ^" then
3100 -- Suppress "size too small" errors in CodePeer mode, since code may
3101 -- be analyzed in a different configuration than the one used for
3102 -- compilation. Even when the configurations match, this message
3103 -- may be issued on correct code, because pragma Pack is ignored
3104 -- in CodePeer mode.
3106 if CodePeer_Mode
then
3109 -- When a size is wrong for a frozen type there is no explicit size
3110 -- clause, and other errors have occurred, suppress the message,
3111 -- since it is likely that this size error is a cascaded result of
3112 -- other errors. The reason we eliminate unfrozen types is that
3113 -- messages issued before the freeze type are for sure OK.
3116 and then Serious_Errors_Detected
> 0
3117 and then Nkind
(N
) /= N_Component_Clause
3118 and then Nkind
(Parent
(N
)) /= N_Component_Clause
3120 No
(Get_Attribute_Definition_Clause
(E
, Attribute_Size
))
3122 No
(Get_Attribute_Definition_Clause
(E
, Attribute_Object_Size
))
3124 No
(Get_Attribute_Definition_Clause
(E
, Attribute_Value_Size
))
3130 -- All special tests complete, so go ahead with message
3133 end Special_Msg_Delete
;
3139 procedure SPARK_Msg_N
(Msg
: String; N
: Node_Or_Entity_Id
) is
3141 if SPARK_Mode
/= Off
then
3142 Error_Msg_N
(Msg
, N
);
3150 procedure SPARK_Msg_NE
3152 N
: Node_Or_Entity_Id
;
3153 E
: Node_Or_Entity_Id
)
3156 if SPARK_Mode
/= Off
then
3157 Error_Msg_NE
(Msg
, N
, E
);
3161 --------------------------
3162 -- Unwind_Internal_Type --
3163 --------------------------
3165 procedure Unwind_Internal_Type
(Ent
: in out Entity_Id
) is
3166 Derived
: Boolean := False;
3168 Old_Ent
: Entity_Id
;
3171 -- Undo placement of a quote, since we will put it back later
3173 Mchar
:= Msg_Buffer
(Msglen
);
3176 Msglen
:= Msglen
- 1;
3179 -- The loop here deals with recursive types, we are trying to find a
3180 -- related entity that is not an implicit type. Note that the check with
3181 -- Old_Ent stops us from getting "stuck". Also, we don't output the
3182 -- "type derived from" message more than once in the case where we climb
3183 -- up multiple levels.
3188 -- Implicit access type, use directly designated type In Ada 2005,
3189 -- the designated type may be an anonymous access to subprogram, in
3190 -- which case we can only point to its definition.
3192 if Is_Access_Type
(Ent
) then
3193 if Ekind
(Ent
) = E_Access_Subprogram_Type
3194 or else Ekind
(Ent
) = E_Anonymous_Access_Subprogram_Type
3195 or else Is_Access_Protected_Subprogram_Type
(Ent
)
3197 Ent
:= Directly_Designated_Type
(Ent
);
3199 if not Comes_From_Source
(Ent
) then
3200 if Buffer_Ends_With
("type ") then
3201 Buffer_Remove
("type ");
3205 if Ekind
(Ent
) = E_Function
then
3206 Set_Msg_Str
("access to function ");
3207 elsif Ekind
(Ent
) = E_Procedure
then
3208 Set_Msg_Str
("access to procedure ");
3210 Set_Msg_Str
("access to subprogram");
3215 -- Type is access to object, named or anonymous
3218 Set_Msg_Str
("access to ");
3219 Ent
:= Directly_Designated_Type
(Ent
);
3224 elsif Is_Class_Wide_Type
(Ent
) then
3226 Ent
:= Root_Type
(Ent
);
3228 -- Use base type if this is a subtype
3230 elsif Ent
/= Base_Type
(Ent
) then
3231 Buffer_Remove
("type ");
3233 -- Avoid duplication "subtype of subtype of", and also replace
3234 -- "derived from subtype of" simply by "derived from"
3236 if not Buffer_Ends_With
("subtype of ")
3237 and then not Buffer_Ends_With
("derived from ")
3239 Set_Msg_Str
("subtype of ");
3242 Ent
:= Base_Type
(Ent
);
3244 -- If this is a base type with a first named subtype, use the first
3245 -- named subtype instead. This is not quite accurate in all cases,
3246 -- but it makes too much noise to be accurate and add 'Base in all
3247 -- cases. Note that we only do this is the first named subtype is not
3248 -- itself an internal name. This avoids the obvious loop (subtype ->
3249 -- basetype -> subtype) which would otherwise occur).
3253 FST
: constant Entity_Id
:= First_Subtype
(Ent
);
3256 if not Is_Internal_Name
(Chars
(FST
)) then
3260 -- Otherwise use root type
3264 Buffer_Remove
("type ");
3266 -- Test for "subtype of type derived from" which seems
3267 -- excessive and is replaced by "type derived from".
3269 Buffer_Remove
("subtype of");
3271 -- Avoid duplicated "type derived from type derived from"
3273 if not Buffer_Ends_With
("type derived from ") then
3274 Set_Msg_Str
("type derived from ");
3285 -- If we are stuck in a loop, get out and settle for the internal
3286 -- name after all. In this case we set to kill the message if it is
3287 -- not the first error message (we really try hard not to show the
3288 -- dirty laundry of the implementation to the poor user).
3290 if Ent
= Old_Ent
then
3291 Kill_Message
:= True;
3295 -- Get out if we finally found a non-internal name to use
3297 exit Find
when not Is_Internal_Name
(Chars
(Ent
));
3303 end Unwind_Internal_Type
;
3305 --------------------
3306 -- Warn_Insertion --
3307 --------------------
3309 function Warn_Insertion
return String is
3311 case Warning_Msg_Char
is
3314 when 'a' .. 'z' |
'A' .. 'Z' |
'*' |
'$' =>
3315 return '?' & Warning_Msg_Char
& '?';
3319 raise Program_Error
;