1 ------------------------------------------------------------------------------
3 -- GNAT COMPILER COMPONENTS --
9 -- Copyright (C) 1992-2020, 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 Gnatvsn
; use Gnatvsn
;
41 with Nlists
; use Nlists
;
42 with Output
; use Output
;
43 with Scans
; use Scans
;
44 with Sem_Aux
; use Sem_Aux
;
45 with Sinput
; use Sinput
;
46 with Sinfo
; use Sinfo
;
47 with Snames
; use Snames
;
48 with Stand
; use Stand
;
49 with Stylesw
; use Stylesw
;
50 with Uname
; use Uname
;
52 package body Errout
is
54 Errors_Must_Be_Ignored
: Boolean := False;
55 -- Set to True by procedure Set_Ignore_Errors (True), when calls to error
56 -- message procedures should be ignored (when parsing irrelevant text in
57 -- sources being preprocessed).
59 Finalize_Called
: Boolean := False;
60 -- Set True if the Finalize routine has been called
62 Record_Compilation_Errors
: Boolean := False;
63 -- Record that a compilation error was witnessed during a given phase of
64 -- analysis for gnat2why. This is needed as Warning_Mode is modified twice
65 -- in gnat2why, hence Erroutc.Compilation_Errors can only return a suitable
66 -- value for each phase of analysis separately. This is updated at each
67 -- call to Compilation_Errors.
69 Warn_On_Instance
: Boolean;
70 -- Flag set true for warning message to be posted on instance
72 ------------------------------------
73 -- Table of Non-Instance Messages --
74 ------------------------------------
76 -- This table contains an entry for every error message processed by the
77 -- Error_Msg routine that is not posted on generic (or inlined) instance.
78 -- As explained in further detail in the Error_Msg procedure body, this
79 -- table is used to avoid posting redundant messages on instances.
81 type NIM_Record
is record
85 -- Type used to store text and location of one message
87 package Non_Instance_Msgs
is new Table
.Table
(
88 Table_Component_Type
=> NIM_Record
,
89 Table_Index_Type
=> Int
,
92 Table_Increment
=> 100,
93 Table_Name
=> "Non_Instance_Msgs");
95 -----------------------
96 -- Local Subprograms --
97 -----------------------
99 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. Node is the relevant
116 -- Node_Id for this message, to be used to compute the enclosing entity if
117 -- Opt.Include_Subprogram_In_Messages is set.
119 function No_Warnings
(N
: Node_Or_Entity_Id
) return Boolean;
120 -- Determines if warnings should be suppressed for the given node
122 function OK_Node
(N
: Node_Id
) return Boolean;
123 -- Determines if a node is an OK node to place an error message on (return
124 -- True) or if the error message should be suppressed (return False). A
125 -- message is suppressed if the node already has an error posted on it,
126 -- or if it refers to an Etype that has an error posted on it, or if
127 -- it references an Entity that has an error posted on it.
129 procedure Output_Source_Line
130 (L
: Physical_Line_Number
;
131 Sfile
: Source_File_Index
;
133 -- Outputs text of source line L, in file S, together with preceding line
134 -- number, as described above for Output_Line_Number. The Errs parameter
135 -- indicates if there are errors attached to the line, which forces
136 -- listing on, even in the presence of pragma List (Off).
138 procedure Set_Msg_Insertion_Column
;
139 -- Handle column number insertion (@ insertion character)
141 procedure Set_Msg_Insertion_Node
;
142 -- Handle node (name from node) insertion (& insertion character)
144 procedure Set_Msg_Insertion_Type_Reference
(Flag
: Source_Ptr
);
145 -- Handle type reference (right brace insertion character). Flag is the
146 -- location of the flag, which is provided for the internal call to
147 -- Set_Msg_Insertion_Line_Number,
149 procedure Set_Msg_Insertion_Unit_Name
(Suffix
: Boolean := True);
150 -- Handle unit name insertion ($ insertion character). Depending on Boolean
151 -- parameter Suffix, (spec) or (body) is appended after the unit name.
153 procedure Set_Msg_Node
(Node
: Node_Id
);
154 -- Add the sequence of characters for the name associated with the given
155 -- node to the current message. For N_Designator, N_Selected_Component,
156 -- N_Defining_Program_Unit_Name, and N_Expanded_Name, the Prefix is
159 procedure Set_Msg_Text
(Text
: String; Flag
: Source_Ptr
);
160 -- Add a sequence of characters to the current message. The characters may
161 -- be one of the special insertion characters (see documentation in spec).
162 -- Flag is the location at which the error is to be posted, which is used
163 -- to determine whether or not the # insertion needs a file name. The
164 -- variables Msg_Buffer are set on return Msglen.
166 procedure Set_Posted
(N
: Node_Id
);
167 -- Sets the Error_Posted flag on the given node, and all its parents that
168 -- are subexpressions and then on the parent non-subexpression construct
169 -- that contains the original expression. If that parent is a named
170 -- association, the flag is further propagated to its parent. This is done
171 -- in order to guard against cascaded errors. Note that this call has an
172 -- effect for a serious error only.
174 procedure Set_Qualification
(N
: Nat
; E
: Entity_Id
);
175 -- Outputs up to N levels of qualification for the given entity. For
176 -- example, the entity A.B.C.D will output B.C. if N = 2.
178 function Special_Msg_Delete
180 N
: Node_Or_Entity_Id
;
181 E
: Node_Or_Entity_Id
) return Boolean;
182 -- This function is called from Error_Msg_NEL, passing the message Msg,
183 -- node N on which the error is to be posted, and the entity or node E
184 -- to be used for an & insertion in the message if any. The job of this
185 -- procedure is to test for certain cascaded messages that we would like
186 -- to suppress. If the message is to be suppressed then we return True.
187 -- If the message should be generated (the normal case) False is returned.
189 procedure Unwind_Internal_Type
(Ent
: in out Entity_Id
);
190 -- This procedure is given an entity id for an internal type, i.e. a type
191 -- with an internal name. It unwinds the type to try to get to something
192 -- reasonably printable, generating prefixes like "subtype of", "access
193 -- to", etc along the way in the buffer. The value in Ent on return is the
194 -- final name to be printed. Hopefully this is not an internal name, but in
195 -- some internal name cases, it is an internal name, and has to be printed
196 -- anyway (although in this case the message has been killed if possible).
197 -- The global variable Class_Flag is set to True if the resulting entity
198 -- should have 'Class appended to its name (see Add_Class procedure), and
199 -- is otherwise unchanged.
201 function Warn_Insertion
return String;
202 -- This is called for warning messages only (so Warning_Msg_Char is set)
203 -- and returns a corresponding string to use at the beginning of generated
204 -- auxiliary messages, such as "in instantiation at ...".
205 -- 'a' .. 'z' returns "?x?"
206 -- 'A' .. 'Z' returns "?X?"
208 -- '$' returns "?$?info: "
210 -- No other settings are valid
212 -----------------------
213 -- Change_Error_Text --
214 -----------------------
216 procedure Change_Error_Text
(Error_Id
: Error_Msg_Id
; New_Msg
: String) is
217 Save_Next
: Error_Msg_Id
;
218 Err_Id
: Error_Msg_Id
:= Error_Id
;
221 Set_Msg_Text
(New_Msg
, Errors
.Table
(Error_Id
).Sptr
);
222 Errors
.Table
(Error_Id
).Text
:= new String'(Msg_Buffer (1 .. Msglen));
224 -- If in immediate error message mode, output modified error message now
225 -- This is just a bit tricky, because we want to output just a single
226 -- message, and the messages we modified is already linked in. We solve
227 -- this by temporarily resetting its forward pointer to empty.
229 if Debug_Flag_OO then
230 Save_Next := Errors.Table (Error_Id).Next;
231 Errors.Table (Error_Id).Next := No_Error_Msg;
234 (Errors.Table (Error_Id).Line, Errors.Table (Error_Id).Sfile, True);
235 Output_Error_Msgs (Err_Id);
236 Errors.Table (Error_Id).Next := Save_Next;
238 end Change_Error_Text;
240 ------------------------
241 -- Compilation_Errors --
242 ------------------------
244 function Compilation_Errors return Boolean is
246 if not Finalize_Called then
249 -- Record that a compilation error was witnessed during a given phase of
250 -- analysis for gnat2why. This is needed as Warning_Mode is modified
251 -- twice in gnat2why, hence Erroutc.Compilation_Errors can only return a
252 -- suitable value for each phase of analysis separately.
255 Record_Compilation_Errors :=
256 Record_Compilation_Errors or else Erroutc.Compilation_Errors;
258 return Record_Compilation_Errors;
260 end Compilation_Errors;
262 --------------------------------------
263 -- Delete_Warning_And_Continuations --
264 --------------------------------------
266 procedure Delete_Warning_And_Continuations (Msg : Error_Msg_Id) is
270 pragma Assert (not Errors.Table (Msg).Msg_Cont);
275 M : Error_Msg_Object renames Errors.Table (Id);
278 if not M.Deleted then
280 Warnings_Detected := Warnings_Detected - 1;
283 Warning_Info_Messages := Warning_Info_Messages - 1;
287 Warnings_Treated_As_Errors := Warnings_Treated_As_Errors - 1;
292 exit when Id = No_Error_Msg;
293 exit when not Errors.Table (Id).Msg_Cont;
296 end Delete_Warning_And_Continuations;
302 -- Error_Msg posts a flag at the given location, except that if the
303 -- Flag_Location points within a generic template and corresponds to an
304 -- instantiation of this generic template, then the actual message will be
305 -- posted on the generic instantiation, along with additional messages
306 -- referencing the generic declaration.
308 procedure Error_Msg (Msg : String; Flag_Location : Source_Ptr) is
310 Error_Msg (Msg, Flag_Location, Current_Node);
315 Flag_Location : Source_Ptr;
316 Is_Compile_Time_Pragma : Boolean)
318 Save_Is_Compile_Time_Msg : constant Boolean := Is_Compile_Time_Msg;
320 Is_Compile_Time_Msg := Is_Compile_Time_Pragma;
321 Error_Msg (Msg, Flag_Location, Current_Node);
322 Is_Compile_Time_Msg := Save_Is_Compile_Time_Msg;
327 Flag_Location : Source_Ptr;
330 Sindex : Source_File_Index;
331 -- Source index for flag location
333 Orig_Loc : Source_Ptr;
334 -- Original location of Flag_Location (i.e. location in original
335 -- template in instantiation case, otherwise unchanged).
338 -- Return if all errors are to be ignored
340 if Errors_Must_Be_Ignored then
344 -- If we already have messages, and we are trying to place a message at
345 -- No_Location, then just ignore the attempt since we assume that what
346 -- is happening is some cascaded junk. Note that this is safe in the
347 -- sense that proceeding will surely bomb. We will also bomb if the flag
348 -- location is No_Location and we don't have any messages so far, but
349 -- that is a real bug and a legitimate bomb, so we go ahead.
351 if Flag_Location = No_Location
352 and then Total_Errors_Detected > 0
357 -- Start of processing for new message
359 Sindex := Get_Source_File_Index (Flag_Location);
360 Prescan_Message (Msg);
361 Orig_Loc := Original_Location (Flag_Location);
363 -- If the current location is in an instantiation, the issue arises of
364 -- whether to post the message on the template or the instantiation.
366 -- The way we decide is to see if we have posted the same message on
367 -- the template when we compiled the template (the template is always
368 -- compiled before any instantiations). For this purpose, we use a
369 -- separate table of messages. The reason we do this is twofold:
371 -- First, the messages can get changed by various processing
372 -- including the insertion of tokens etc, making it hard to
373 -- do the comparison.
375 -- Second, we will suppress a warning on a template if it is not in
376 -- the current extended source unit. That's reasonable and means we
377 -- don't want the warning on the instantiation here either, but it
378 -- does mean that the main error table would not in any case include
381 if Flag_Location = Orig_Loc then
382 Non_Instance_Msgs.Append ((new String'(Msg
), Flag_Location
));
383 Warn_On_Instance
:= False;
385 -- Here we have an instance message
388 -- Delete if debug flag off, and this message duplicates a message
389 -- already posted on the corresponding template
391 if not Debug_Flag_GG
then
392 for J
in Non_Instance_Msgs
.First
.. Non_Instance_Msgs
.Last
loop
393 if Msg
= Non_Instance_Msgs
.Table
(J
).Msg
.all
394 and then Non_Instance_Msgs
.Table
(J
).Loc
= Orig_Loc
401 -- No duplicate, so error/warning will be posted on instance
403 Warn_On_Instance
:= Is_Warning_Msg
;
406 -- Ignore warning message that is suppressed for this location. Note
407 -- that style checks are not considered warning messages for this
410 if Is_Warning_Msg
and then Warnings_Suppressed
(Orig_Loc
) /= No_String
414 -- For style messages, check too many messages so far
417 and then Maximum_Messages
/= 0
418 and then Warnings_Detected
>= Maximum_Messages
423 -- The idea at this stage is that we have two kinds of messages
425 -- First, we have those messages that are to be placed as requested at
426 -- Flag_Location. This includes messages that have nothing to do with
427 -- generics, and also messages placed on generic templates that reflect
428 -- an error in the template itself. For such messages we simply call
429 -- Error_Msg_Internal to place the message in the requested location.
431 if Instantiation
(Sindex
) = No_Location
then
432 Error_Msg_Internal
(Msg
, Flag_Location
, Flag_Location
, False, N
);
436 -- If we are trying to flag an error in an instantiation, we may have
437 -- a generic contract violation. What we generate in this case is:
439 -- instantiation error at ...
440 -- original error message
444 -- warning: in instantiation at ...
445 -- warning: original warning message
449 -- info: in instantiation at ...
450 -- info: original info message
452 -- All these messages are posted at the location of the top level
453 -- instantiation. If there are nested instantiations, then the
454 -- instantiation error message can be repeated, pointing to each
455 -- of the relevant instantiations.
457 -- Note: the instantiation mechanism is also shared for inlining of
458 -- subprogram bodies when front end inlining is done. In this case the
459 -- messages have the form:
461 -- in inlined body at ...
462 -- original error message
466 -- warning: in inlined body at ...
467 -- warning: original warning message
471 -- info: in inlined body at ...
472 -- info: original info message
474 -- OK, here we have an instantiation error, and we need to generate the
475 -- error on the instantiation, rather than on the template.
478 Actual_Error_Loc
: Source_Ptr
;
479 -- Location of outer level instantiation in instantiation case, or
480 -- just a copy of Flag_Location in the normal case. This is the
481 -- location where all error messages will actually be posted.
483 Save_Error_Msg_Sloc
: constant Source_Ptr
:= Error_Msg_Sloc
;
484 -- Save possible location set for caller's message. We need to use
485 -- Error_Msg_Sloc for the location of the instantiation error but we
486 -- have to preserve a possible original value.
488 X
: Source_File_Index
;
490 Msg_Cont_Status
: Boolean;
491 -- Used to label continuation lines in instantiation case with
492 -- proper Msg_Cont status.
495 -- Loop to find highest level instantiation, where all error
496 -- messages will be placed.
500 Actual_Error_Loc
:= Instantiation
(X
);
501 X
:= Get_Source_File_Index
(Actual_Error_Loc
);
502 exit when Instantiation
(X
) = No_Location
;
505 -- Since we are generating the messages at the instantiation point in
506 -- any case, we do not want the references to the bad lines in the
507 -- instance to be annotated with the location of the instantiation.
509 Suppress_Instance_Location
:= True;
510 Msg_Cont_Status
:= False;
512 -- Loop to generate instantiation messages
514 Error_Msg_Sloc
:= Flag_Location
;
515 X
:= Get_Source_File_Index
(Flag_Location
);
516 while Instantiation
(X
) /= No_Location
loop
518 -- Suppress instantiation message on continuation lines
520 if Msg
(Msg
'First) /= '\' then
522 -- Case of inlined body
524 if Inlined_Body
(X
) then
527 (Msg
=> "info: in inlined body #",
528 Sptr
=> Actual_Error_Loc
,
529 Optr
=> Flag_Location
,
530 Msg_Cont
=> Msg_Cont_Status
,
533 elsif Is_Warning_Msg
then
535 (Msg
=> Warn_Insertion
& "in inlined body #",
536 Sptr
=> Actual_Error_Loc
,
537 Optr
=> Flag_Location
,
538 Msg_Cont
=> Msg_Cont_Status
,
541 elsif Is_Style_Msg
then
543 (Msg
=> "style: in inlined body #",
544 Sptr
=> Actual_Error_Loc
,
545 Optr
=> Flag_Location
,
546 Msg_Cont
=> Msg_Cont_Status
,
551 (Msg
=> "error in inlined body #",
552 Sptr
=> Actual_Error_Loc
,
553 Optr
=> Flag_Location
,
554 Msg_Cont
=> Msg_Cont_Status
,
558 -- Case of generic instantiation
563 (Msg
=> "info: in instantiation #",
564 Sptr
=> Actual_Error_Loc
,
565 Optr
=> Flag_Location
,
566 Msg_Cont
=> Msg_Cont_Status
,
569 elsif Is_Warning_Msg
then
571 (Msg
=> Warn_Insertion
& "in instantiation #",
572 Sptr
=> Actual_Error_Loc
,
573 Optr
=> Flag_Location
,
574 Msg_Cont
=> Msg_Cont_Status
,
577 elsif Is_Style_Msg
then
579 (Msg
=> "style: in instantiation #",
580 Sptr
=> Actual_Error_Loc
,
581 Optr
=> Flag_Location
,
582 Msg_Cont
=> Msg_Cont_Status
,
587 (Msg
=> "instantiation error #",
588 Sptr
=> Actual_Error_Loc
,
589 Optr
=> Flag_Location
,
590 Msg_Cont
=> Msg_Cont_Status
,
596 Error_Msg_Sloc
:= Instantiation
(X
);
597 X
:= Get_Source_File_Index
(Error_Msg_Sloc
);
598 Msg_Cont_Status
:= True;
601 Suppress_Instance_Location
:= False;
602 Error_Msg_Sloc
:= Save_Error_Msg_Sloc
;
604 -- Here we output the original message on the outer instantiation
608 Sptr
=> Actual_Error_Loc
,
609 Optr
=> Flag_Location
,
610 Msg_Cont
=> Msg_Cont_Status
,
615 --------------------------------
616 -- Error_Msg_Ada_2012_Feature --
617 --------------------------------
619 procedure Error_Msg_Ada_2012_Feature
(Feature
: String; Loc
: Source_Ptr
) is
621 if Ada_Version
< Ada_2012
then
622 Error_Msg
(Feature
& " is an Ada 2012 feature", Loc
);
624 if No
(Ada_Version_Pragma
) then
625 Error_Msg
("\unit must be compiled with -gnat2012 switch", Loc
);
627 Error_Msg_Sloc
:= Sloc
(Ada_Version_Pragma
);
628 Error_Msg
("\incompatible with Ada version set#", Loc
);
631 end Error_Msg_Ada_2012_Feature
;
633 --------------------------------
634 -- Error_Msg_Ada_2020_Feature --
635 --------------------------------
637 procedure Error_Msg_Ada_2020_Feature
(Feature
: String; Loc
: Source_Ptr
) is
639 if Ada_Version
< Ada_2020
then
640 Error_Msg
(Feature
& " is an Ada 2020 feature", Loc
);
642 if No
(Ada_Version_Pragma
) then
643 Error_Msg
("\unit must be compiled with -gnat2020 switch", Loc
);
645 Error_Msg_Sloc
:= Sloc
(Ada_Version_Pragma
);
646 Error_Msg
("\incompatible with Ada version set#", Loc
);
649 end Error_Msg_Ada_2020_Feature
;
655 procedure Error_Msg_AP
(Msg
: String) is
660 -- If we had saved the Scan_Ptr value after scanning the previous
661 -- token, then we would have exactly the right place for putting
662 -- the flag immediately at hand. However, that would add at least
663 -- two instructions to a Scan call *just* to service the possibility
664 -- of an Error_Msg_AP call. So instead we reconstruct that value.
666 -- We have two possibilities, start with Prev_Token_Ptr and skip over
667 -- the current token, which is made harder by the possibility that this
668 -- token may be in error, or start with Token_Ptr and work backwards.
669 -- We used to take the second approach, but it's hard because of
670 -- comments, and harder still because things that look like comments
671 -- can appear inside strings. So now we take the first approach.
673 -- Note: in the case where there is no previous token, Prev_Token_Ptr
674 -- is set to Source_First, which is a reasonable position for the
675 -- error flag in this situation.
677 S1
:= Prev_Token_Ptr
;
680 -- If the previous token is a string literal, we need a special approach
681 -- since there may be white space inside the literal and we don't want
682 -- to stop on that white space.
684 -- Note: since this is an error recovery issue anyway, it is not worth
685 -- worrying about special UTF_32 line terminator characters here.
687 if Prev_Token
= Tok_String_Literal
then
691 if Source
(S1
) = C
then
693 exit when Source
(S1
) /= C
;
694 elsif Source
(S1
) in Line_Terminator
then
699 -- Character literal also needs special handling
701 elsif Prev_Token
= Tok_Char_Literal
then
704 -- Otherwise we search forward for the end of the current token, marked
705 -- by a line terminator, white space, a comment symbol or if we bump
706 -- into the following token (i.e. the current token).
708 -- Again, it is not worth worrying about UTF_32 special line terminator
709 -- characters in this context, since this is only for error recovery.
712 while Source
(S1
) not in Line_Terminator
713 and then Source
(S1
) /= ' '
714 and then Source
(S1
) /= ASCII
.HT
715 and then (Source
(S1
) /= '-' or else Source
(S1
+ 1) /= '-')
716 and then S1
/= Token_Ptr
722 -- S1 is now set to the location for the flag
731 procedure Error_Msg_BC
(Msg
: String) is
733 -- If we are at end of file, post the flag after the previous token
735 if Token
= Tok_EOF
then
738 -- If we are at start of file, post the flag at the current token
740 elsif Token_Ptr
= Source_First
(Current_Source_File
) then
743 -- If the character before the current token is a space or a horizontal
744 -- tab, then we place the flag on this character (in the case of a tab
745 -- we would really like to place it in the "last" character of the tab
746 -- space, but that it too much trouble to worry about).
748 elsif Source
(Token_Ptr
- 1) = ' '
749 or else Source
(Token_Ptr
- 1) = ASCII
.HT
751 Error_Msg
(Msg
, Token_Ptr
- 1);
753 -- If there is no space or tab before the current token, then there is
754 -- no room to place the flag before the token, so we place it on the
755 -- token instead (this happens for example at the start of a line).
758 Error_Msg
(Msg
, Token_Ptr
);
766 procedure Error_Msg_CRT
(Feature
: String; N
: Node_Id
) is
767 CNRT
: constant String := " not allowed in no run time mode";
768 CCRT
: constant String := " not supported by configuration>";
770 S
: String (1 .. Feature
'Length + 1 + CCRT
'Length);
775 S
(2 .. Feature
'Length + 1) := Feature
;
776 L
:= Feature
'Length + 2;
778 if No_Run_Time_Mode
then
779 S
(L
.. L
+ CNRT
'Length - 1) := CNRT
;
780 L
:= L
+ CNRT
'Length - 1;
782 else pragma Assert
(Configurable_Run_Time_Mode
);
783 S
(L
.. L
+ CCRT
'Length - 1) := CCRT
;
784 L
:= L
+ CCRT
'Length - 1;
787 Error_Msg_N
(S
(1 .. L
), N
);
788 Configurable_Run_Time_Violations
:= Configurable_Run_Time_Violations
+ 1;
795 procedure Error_Msg_PT
(E
: Entity_Id
; Iface_Prim
: Entity_Id
) is
798 ("illegal overriding of subprogram inherited from interface", E
);
800 Error_Msg_Sloc
:= Sloc
(Iface_Prim
);
802 if Ekind
(E
) = E_Function
then
804 ("\first formal of & declared # must be of mode `IN` "
805 & "or access-to-constant", E
);
808 ("\first formal of & declared # must be of mode `OUT`, `IN OUT` "
809 & "or access-to-variable", E
);
817 procedure Error_Msg_F
(Msg
: String; N
: Node_Id
) is
819 Error_Msg_NEL
(Msg
, N
, N
, Sloc
(First_Node
(N
)));
826 procedure Error_Msg_FE
829 E
: Node_Or_Entity_Id
)
832 Error_Msg_NEL
(Msg
, N
, E
, Sloc
(First_Node
(N
)));
835 ------------------------
836 -- Error_Msg_Internal --
837 ------------------------
839 procedure Error_Msg_Internal
846 Next_Msg
: Error_Msg_Id
;
847 -- Pointer to next message at insertion point
849 Prev_Msg
: Error_Msg_Id
;
850 -- Pointer to previous message at insertion point
852 Temp_Msg
: Error_Msg_Id
;
855 -- Set if warning to be treated as error
857 procedure Handle_Serious_Error
;
858 -- Internal procedure to do all error message handling for a serious
859 -- error message, other than bumping the error counts and arranging
860 -- for the message to be output.
862 --------------------------
863 -- Handle_Serious_Error --
864 --------------------------
866 procedure Handle_Serious_Error
is
868 -- Turn off code generation if not done already
870 if Operating_Mode
= Generate_Code
then
871 Operating_Mode
:= Check_Semantics
;
872 Expander_Active
:= False;
875 -- Set the fatal error flag in the unit table unless we are in
876 -- Try_Semantics mode (in which case we set ignored mode if not
877 -- currently set. This stops the semantics from being performed
878 -- if we find a serious error. This is skipped if we are currently
879 -- dealing with the configuration pragma file.
881 if Current_Source_Unit
/= No_Unit
then
883 U
: constant Unit_Number_Type
:= Get_Source_Unit
(Sptr
);
885 if Try_Semantics
then
886 if Fatal_Error
(U
) = None
then
887 Set_Fatal_Error
(U
, Error_Ignored
);
890 Set_Fatal_Error
(U
, Error_Detected
);
895 -- Disable warnings on unused use clauses and the like. Otherwise, an
896 -- error might hide a reference to an entity in a used package, so
897 -- after fixing the error, the use clause no longer looks like it was
900 Check_Unreferenced
:= False;
901 Check_Unreferenced_Formals
:= False;
902 end Handle_Serious_Error
;
904 -- Start of processing for Error_Msg_Internal
907 if Raise_Exception_On_Error
/= 0 then
908 raise Error_Msg_Exception
;
911 Continuation
:= Msg_Cont
;
912 Continuation_New_Line
:= False;
913 Suppress_Message
:= False;
914 Kill_Message
:= False;
915 Set_Msg_Text
(Msg
, Sptr
);
917 -- Kill continuation if parent message killed
919 if Continuation
and Last_Killed
then
923 -- Return without doing anything if message is suppressed
926 and then not All_Errors_Mode
927 and then not Is_Warning_Msg
928 and then not Is_Unconditional_Msg
930 if not Continuation
then
937 -- Return without doing anything if message is killed and this is not
938 -- the first error message. The philosophy is that if we get a weird
939 -- error message and we already have had a message, then we hope the
940 -- weird message is a junk cascaded message
943 and then not All_Errors_Mode
944 and then Total_Errors_Detected
/= 0
946 if not Continuation
then
953 -- Special check for warning message to see if it should be output
955 if Is_Warning_Msg
then
957 -- Immediate return if warning message and warnings are suppressed
959 if Warnings_Suppressed
(Optr
) /= No_String
961 Warnings_Suppressed
(Sptr
) /= No_String
963 Cur_Msg
:= No_Error_Msg
;
967 -- If the flag location is in the main extended source unit then for
968 -- sure we want the warning since it definitely belongs
970 if In_Extended_Main_Source_Unit
(Sptr
) then
973 -- If the main unit has not been read yet. the warning must be on
974 -- a configuration file: gnat.adc or user-defined. This means we
975 -- are not parsing the main unit yet, so skip following checks.
977 elsif No
(Cunit
(Main_Unit
)) then
980 -- If the flag location is not in the main extended source unit, then
981 -- we want to eliminate the warning, unless it is in the extended
982 -- main code unit and we want warnings on the instance.
984 elsif In_Extended_Main_Code_Unit
(Sptr
) and then Warn_On_Instance
then
987 -- Keep warning if debug flag G set
989 elsif Debug_Flag_GG
then
992 -- Keep warning if message text contains !!
994 elsif Has_Double_Exclam
then
997 -- Here is where we delete a warning from a with'ed unit
1000 Cur_Msg
:= No_Error_Msg
;
1002 if not Continuation
then
1003 Last_Killed
:= True;
1010 -- If message is to be ignored in special ignore message mode, this is
1011 -- where we do this special processing, bypassing message output.
1013 if Ignore_Errors_Enable
> 0 then
1014 if Is_Serious_Error
then
1015 Handle_Serious_Error
;
1021 -- If error message line length set, and this is a continuation message
1022 -- then all we do is to append the text to the text of the last message
1023 -- with a comma space separator (eliminating a possible (style) or
1026 if Error_Msg_Line_Length
/= 0 and then Continuation
then
1027 Cur_Msg
:= Errors
.Last
;
1030 Oldm
: String_Ptr
:= Errors
.Table
(Cur_Msg
).Text
;
1031 Newm
: String (1 .. Oldm
'Last + 2 + Msglen
);
1036 -- First copy old message to new one and free it
1038 Newm
(Oldm
'Range) := Oldm
.all;
1039 Newl
:= Oldm
'Length;
1042 -- Remove (style) or info: at start of message
1044 if Msglen
> 8 and then Msg_Buffer
(1 .. 8) = "(style) " then
1047 elsif Msglen
> 6 and then Msg_Buffer
(1 .. 6) = "info: " then
1054 -- Now deal with separation between messages. Normally this is
1055 -- simply comma space, but there are some special cases.
1057 -- If continuation new line, then put actual NL character in msg
1059 if Continuation_New_Line
then
1061 Newm
(Newl
) := ASCII
.LF
;
1063 -- If continuation message is enclosed in parentheses, then
1064 -- special treatment (don't need a comma, and we want to combine
1065 -- successive parenthetical remarks into a single one with
1066 -- separating commas).
1068 elsif Msg_Buffer
(M
) = '(' and then Msg_Buffer
(Msglen
) = ')' then
1070 -- Case where existing message ends in right paren, remove
1071 -- and separate parenthetical remarks with a comma.
1073 if Newm
(Newl
) = ')' then
1075 Msg_Buffer
(M
) := ' ';
1077 -- Case where we are adding new parenthetical comment
1084 -- Case where continuation not in parens and no new line
1087 Newm
(Newl
+ 1 .. Newl
+ 2) := ", ";
1091 -- Append new message
1093 Newm
(Newl
+ 1 .. Newl
+ Msglen
- M
+ 1) :=
1094 Msg_Buffer
(M
.. Msglen
);
1095 Newl
:= Newl
+ Msglen
- M
+ 1;
1096 Errors
.Table
(Cur_Msg
).Text
:= new String'(Newm (1 .. Newl));
1098 -- Update warning msg flag and message doc char if needed
1100 if Is_Warning_Msg then
1101 if not Errors.Table (Cur_Msg).Warn then
1102 Errors.Table (Cur_Msg).Warn := True;
1103 Errors.Table (Cur_Msg).Warn_Chr := Warning_Msg_Char;
1105 elsif Warning_Msg_Char /= ' ' then
1106 Errors.Table (Cur_Msg).Warn_Chr := Warning_Msg_Char;
1114 -- Here we build a new error object
1117 ((Text => new String'(Msg_Buffer
(1 .. Msglen
)),
1118 Next
=> No_Error_Msg
,
1119 Prev
=> No_Error_Msg
,
1122 Insertion_Sloc
=> (if Has_Insertion_Line
then Error_Msg_Sloc
1124 Sfile
=> Get_Source_File_Index
(Sptr
),
1125 Line
=> Get_Physical_Line_Number
(Sptr
),
1126 Col
=> Get_Column_Number
(Sptr
),
1127 Compile_Time_Pragma
=> Is_Compile_Time_Msg
,
1128 Warn
=> Is_Warning_Msg
,
1129 Info
=> Is_Info_Msg
,
1130 Check
=> Is_Check_Msg
,
1131 Warn_Err
=> False, -- reset below
1132 Warn_Chr
=> Warning_Msg_Char
,
1133 Style
=> Is_Style_Msg
,
1134 Serious
=> Is_Serious_Error
,
1135 Uncond
=> Is_Unconditional_Msg
,
1136 Msg_Cont
=> Continuation
,
1139 Cur_Msg
:= Errors
.Last
;
1141 -- Test if warning to be treated as error
1144 (Is_Warning_Msg
or Is_Style_Msg
)
1145 and then (Warning_Treated_As_Error
(Msg_Buffer
(1 .. Msglen
))
1147 Warning_Treated_As_Error
(Get_Warning_Tag
(Cur_Msg
)));
1149 -- Propagate Warn_Err to this message and preceding continuations
1151 for J
in reverse 1 .. Errors
.Last
loop
1152 Errors
.Table
(J
).Warn_Err
:= Warn_Err
;
1153 exit when not Errors
.Table
(J
).Msg_Cont
;
1156 -- If immediate errors mode set, output error message now. Also output
1157 -- now if the -d1 debug flag is set (so node number message comes out
1158 -- just before actual error message)
1160 if Debug_Flag_OO
or else Debug_Flag_1
then
1163 (Errors
.Table
(Cur_Msg
).Line
, Errors
.Table
(Cur_Msg
).Sfile
, True);
1164 Temp_Msg
:= Cur_Msg
;
1165 Output_Error_Msgs
(Temp_Msg
);
1167 -- If not in immediate errors mode, then we insert the message in the
1168 -- error chain for later output by Finalize. The messages are sorted
1169 -- first by unit (main unit comes first), and within a unit by source
1170 -- location (earlier flag location first in the chain).
1173 -- First a quick check, does this belong at the very end of the chain
1174 -- of error messages. This saves a lot of time in the normal case if
1175 -- there are lots of messages.
1177 if Last_Error_Msg
/= No_Error_Msg
1178 and then Errors
.Table
(Cur_Msg
).Sfile
=
1179 Errors
.Table
(Last_Error_Msg
).Sfile
1180 and then (Sptr
> Errors
.Table
(Last_Error_Msg
).Sptr
1182 (Sptr
= Errors
.Table
(Last_Error_Msg
).Sptr
1184 Optr
> Errors
.Table
(Last_Error_Msg
).Optr
))
1186 Prev_Msg
:= Last_Error_Msg
;
1187 Next_Msg
:= No_Error_Msg
;
1189 -- Otherwise do a full sequential search for the insertion point
1192 Prev_Msg
:= No_Error_Msg
;
1193 Next_Msg
:= First_Error_Msg
;
1194 while Next_Msg
/= No_Error_Msg
loop
1196 Errors
.Table
(Cur_Msg
).Sfile
< Errors
.Table
(Next_Msg
).Sfile
;
1198 if Errors
.Table
(Cur_Msg
).Sfile
= Errors
.Table
(Next_Msg
).Sfile
1200 exit when Sptr
< Errors
.Table
(Next_Msg
).Sptr
1201 or else (Sptr
= Errors
.Table
(Next_Msg
).Sptr
1202 and then Optr
< Errors
.Table
(Next_Msg
).Optr
);
1205 Prev_Msg
:= Next_Msg
;
1206 Next_Msg
:= Errors
.Table
(Next_Msg
).Next
;
1210 -- Now we insert the new message in the error chain.
1212 -- The possible insertion point for the new message is after Prev_Msg
1213 -- and before Next_Msg. However, this is where we do a special check
1214 -- for redundant parsing messages, defined as messages posted on the
1215 -- same line. The idea here is that probably such messages are junk
1216 -- from the parser recovering. In full errors mode, we don't do this
1217 -- deletion, but otherwise such messages are discarded at this stage.
1219 if Prev_Msg
/= No_Error_Msg
1220 and then Errors
.Table
(Prev_Msg
).Line
=
1221 Errors
.Table
(Cur_Msg
).Line
1222 and then Errors
.Table
(Prev_Msg
).Sfile
=
1223 Errors
.Table
(Cur_Msg
).Sfile
1224 and then Compiler_State
= Parsing
1225 and then not All_Errors_Mode
1227 -- Don't delete unconditional messages and at this stage, don't
1228 -- delete continuation lines; we attempted to delete those earlier
1229 -- if the parent message was deleted.
1231 if not Errors
.Table
(Cur_Msg
).Uncond
1232 and then not Continuation
1234 -- Don't delete if prev msg is warning and new msg is an error.
1235 -- This is because we don't want a real error masked by a
1236 -- warning. In all other cases (that is parse errors for the
1237 -- same line that are not unconditional) we do delete the
1238 -- message. This helps to avoid junk extra messages from
1239 -- cascaded parsing errors
1241 if not (Errors
.Table
(Prev_Msg
).Warn
1243 Errors
.Table
(Prev_Msg
).Style
)
1245 (Errors
.Table
(Cur_Msg
).Warn
1247 Errors
.Table
(Cur_Msg
).Style
)
1249 -- All tests passed, delete the message by simply returning
1250 -- without any further processing.
1252 pragma Assert
(not Continuation
);
1254 Last_Killed
:= True;
1260 -- Come here if message is to be inserted in the error chain
1262 if not Continuation
then
1263 Last_Killed
:= False;
1266 if Prev_Msg
= No_Error_Msg
then
1267 First_Error_Msg
:= Cur_Msg
;
1269 Errors
.Table
(Prev_Msg
).Next
:= Cur_Msg
;
1272 Errors
.Table
(Cur_Msg
).Next
:= Next_Msg
;
1274 if Next_Msg
= No_Error_Msg
then
1275 Last_Error_Msg
:= Cur_Msg
;
1279 -- Bump appropriate statistics counts
1281 if Errors
.Table
(Cur_Msg
).Info
then
1283 -- Could be (usually is) both "info" and "warning"
1285 if Errors
.Table
(Cur_Msg
).Warn
then
1286 Warning_Info_Messages
:= Warning_Info_Messages
+ 1;
1287 Warnings_Detected
:= Warnings_Detected
+ 1;
1289 Report_Info_Messages
:= Report_Info_Messages
+ 1;
1292 elsif Errors
.Table
(Cur_Msg
).Warn
1293 or else Errors
.Table
(Cur_Msg
).Style
1295 Warnings_Detected
:= Warnings_Detected
+ 1;
1297 elsif Errors
.Table
(Cur_Msg
).Check
then
1298 Check_Messages
:= Check_Messages
+ 1;
1301 Total_Errors_Detected
:= Total_Errors_Detected
+ 1;
1303 if Errors
.Table
(Cur_Msg
).Serious
then
1304 Serious_Errors_Detected
:= Serious_Errors_Detected
+ 1;
1305 Handle_Serious_Error
;
1307 -- If not serious error, set Fatal_Error to indicate ignored error
1311 U
: constant Unit_Number_Type
:= Get_Source_Unit
(Sptr
);
1313 if Fatal_Error
(U
) = None
then
1314 Set_Fatal_Error
(U
, Error_Ignored
);
1320 -- Record warning message issued
1322 if Errors
.Table
(Cur_Msg
).Warn
1323 and then not Errors
.Table
(Cur_Msg
).Msg_Cont
1325 Warning_Msg
:= Cur_Msg
;
1328 -- If too many warnings turn off warnings
1330 if Maximum_Messages
/= 0 then
1331 if Warnings_Detected
= Maximum_Messages
then
1332 Warning_Mode
:= Suppress
;
1335 -- If too many errors abandon compilation
1337 if Total_Errors_Detected
= Maximum_Messages
then
1338 raise Unrecoverable_Error
;
1341 end Error_Msg_Internal
;
1347 procedure Error_Msg_N
(Msg
: String; N
: Node_Or_Entity_Id
) is
1349 Error_Msg_NEL
(Msg
, N
, N
, Sloc
(N
));
1356 procedure Error_Msg_NE
1358 N
: Node_Or_Entity_Id
;
1359 E
: Node_Or_Entity_Id
)
1362 Error_Msg_NEL
(Msg
, N
, E
, Sloc
(N
));
1369 procedure Error_Msg_NEL
1371 N
: Node_Or_Entity_Id
;
1372 E
: Node_Or_Entity_Id
;
1373 Flag_Location
: Source_Ptr
)
1376 if Special_Msg_Delete
(Msg
, N
, E
) then
1380 Prescan_Message
(Msg
);
1382 -- Special handling for warning messages
1384 if Is_Warning_Msg
then
1386 -- Suppress if no warnings set for either entity or node
1388 if No_Warnings
(N
) or else No_Warnings
(E
) then
1390 -- Disable any continuation messages as well
1392 Last_Killed
:= True;
1396 -- Suppress if inside loop that is known to be null or is probably
1397 -- null (case where loop executes only if invalid values present).
1398 -- In either case warnings in the loop are likely to be junk.
1405 while Present
(P
) loop
1406 if Nkind
(P
) = N_Loop_Statement
1407 and then Suppress_Loop_Warnings
(P
)
1417 -- Test for message to be output
1420 or else Is_Unconditional_Msg
1421 or else Is_Warning_Msg
1423 or else (Msg
(Msg
'First) = '\' and then not Last_Killed
)
1426 Error_Msg_Node_1
:= E
;
1427 Error_Msg
(Msg
, Flag_Location
, N
);
1430 Last_Killed
:= True;
1440 procedure Error_Msg_NW
1443 N
: Node_Or_Entity_Id
)
1447 and then In_Extended_Main_Source_Unit
(N
)
1448 and then Comes_From_Source
(N
)
1450 Error_Msg_NEL
(Msg
, N
, N
, Sloc
(N
));
1458 procedure Error_Msg_S
(Msg
: String) is
1460 Error_Msg
(Msg
, Scan_Ptr
);
1467 procedure Error_Msg_SC
(Msg
: String) is
1469 -- If we are at end of file, post the flag after the previous token
1471 if Token
= Tok_EOF
then
1474 -- For all other cases the message is posted at the current token
1478 Error_Msg
(Msg
, Token_Ptr
);
1486 procedure Error_Msg_SP
(Msg
: String) is
1488 -- Note: in the case where there is no previous token, Prev_Token_Ptr
1489 -- is set to Source_First, which is a reasonable position for the
1490 -- error flag in this situation
1492 Error_Msg
(Msg
, Prev_Token_Ptr
);
1499 procedure Finalize
(Last_Call
: Boolean) is
1504 procedure Delete_Warning
(E
: Error_Msg_Id
);
1505 -- Delete a warning msg if not already deleted and adjust warning count
1507 --------------------
1508 -- Delete_Warning --
1509 --------------------
1511 procedure Delete_Warning
(E
: Error_Msg_Id
) is
1513 if not Errors
.Table
(E
).Deleted
then
1514 Errors
.Table
(E
).Deleted
:= True;
1515 Warnings_Detected
:= Warnings_Detected
- 1;
1517 if Errors
.Table
(E
).Info
then
1518 Warning_Info_Messages
:= Warning_Info_Messages
- 1;
1523 -- Start of processing for Finalize
1526 -- Set Prev pointers
1528 Cur
:= First_Error_Msg
;
1529 while Cur
/= No_Error_Msg
loop
1530 Nxt
:= Errors
.Table
(Cur
).Next
;
1531 exit when Nxt
= No_Error_Msg
;
1532 Errors
.Table
(Nxt
).Prev
:= Cur
;
1536 -- Eliminate any duplicated error messages from the list. This is
1537 -- done after the fact to avoid problems with Change_Error_Text.
1539 Cur
:= First_Error_Msg
;
1540 while Cur
/= No_Error_Msg
loop
1541 Nxt
:= Errors
.Table
(Cur
).Next
;
1544 while F
/= No_Error_Msg
1545 and then Errors
.Table
(F
).Sptr
= Errors
.Table
(Cur
).Sptr
1547 Check_Duplicate_Message
(Cur
, F
);
1548 F
:= Errors
.Table
(F
).Next
;
1554 -- Mark any messages suppressed by specific warnings as Deleted
1556 Cur
:= First_Error_Msg
;
1557 while Cur
/= No_Error_Msg
loop
1559 CE
: Error_Msg_Object
renames Errors
.Table
(Cur
);
1560 Tag
: constant String := Get_Warning_Tag
(Cur
);
1563 if (CE
.Warn
and not CE
.Deleted
)
1565 (Warning_Specifically_Suppressed
(CE
.Sptr
, CE
.Text
, Tag
) /=
1568 Warning_Specifically_Suppressed
(CE
.Optr
, CE
.Text
, Tag
) /=
1571 Delete_Warning
(Cur
);
1573 -- If this is a continuation, delete previous parts of message
1576 while Errors
.Table
(F
).Msg_Cont
loop
1577 F
:= Errors
.Table
(F
).Prev
;
1578 exit when F
= No_Error_Msg
;
1582 -- Delete any following continuations
1586 F
:= Errors
.Table
(F
).Next
;
1587 exit when F
= No_Error_Msg
;
1588 exit when not Errors
.Table
(F
).Msg_Cont
;
1594 Cur
:= Errors
.Table
(Cur
).Next
;
1597 Finalize_Called
:= True;
1599 -- Check consistency of specific warnings (may add warnings). We only
1600 -- do this on the last call, after all possible warnings are posted.
1603 Validate_Specific_Warnings
(Error_Msg
'Access);
1611 function First_Node
(C
: Node_Id
) return Node_Id
is
1612 Orig
: constant Node_Id
:= Original_Node
(C
);
1613 Loc
: constant Source_Ptr
:= Sloc
(Orig
);
1614 Sfile
: constant Source_File_Index
:= Get_Source_File_Index
(Loc
);
1618 function Test_Earlier
(N
: Node_Id
) return Traverse_Result
;
1619 -- Function applied to every node in the construct
1621 procedure Search_Tree_First
is new Traverse_Proc
(Test_Earlier
);
1622 -- Create traversal procedure
1628 function Test_Earlier
(N
: Node_Id
) return Traverse_Result
is
1629 Norig
: constant Node_Id
:= Original_Node
(N
);
1630 Loc
: constant Source_Ptr
:= Sloc
(Norig
);
1633 -- Check for earlier
1637 -- Ignore nodes with no useful location information
1639 and then Loc
/= Standard_Location
1640 and then Loc
/= No_Location
1642 -- Ignore nodes from a different file. This ensures against cases
1643 -- of strange foreign code somehow being present. We don't want
1644 -- wild placement of messages if that happens.
1646 and then Get_Source_File_Index
(Loc
) = Sfile
1655 -- Start of processing for First_Node
1658 if Nkind
(Orig
) in N_Subexpr
then
1661 Search_Tree_First
(Orig
);
1673 function First_Sloc
(N
: Node_Id
) return Source_Ptr
is
1674 SI
: constant Source_File_Index
:= Source_Index
(Get_Source_Unit
(N
));
1675 SF
: constant Source_Ptr
:= Source_First
(SI
);
1680 F
:= First_Node
(N
);
1683 -- The following circuit is a bit subtle. When we have parenthesized
1684 -- expressions, then the Sloc will not record the location of the paren,
1685 -- but we would like to post the flag on the paren. So what we do is to
1686 -- crawl up the tree from the First_Node, adjusting the Sloc value for
1687 -- any parentheses we know are present. Yes, we know this circuit is not
1688 -- 100% reliable (e.g. because we don't record all possible paren level
1689 -- values), but this is only for an error message so it is good enough.
1692 Paren_Loop
: for J
in 1 .. Paren_Count
(F
) loop
1694 -- We don't look more than 12 characters behind the current
1695 -- location, and in any case not past the front of the source.
1697 Search_Loop
: for K
in 1 .. 12 loop
1698 exit Search_Loop
when S
= SF
;
1700 if Source_Text
(SI
) (S
- 1) = '(' then
1704 elsif Source_Text
(SI
) (S
- 1) <= ' ' then
1710 end loop Search_Loop
;
1711 end loop Paren_Loop
;
1713 exit Node_Loop
when F
= N
;
1715 exit Node_Loop
when Nkind
(F
) not in N_Subexpr
;
1721 -----------------------
1722 -- Get_Ignore_Errors --
1723 -----------------------
1725 function Get_Ignore_Errors
return Boolean is
1727 return Errors_Must_Be_Ignored
;
1728 end Get_Ignore_Errors
;
1734 procedure Initialize
is
1737 First_Error_Msg
:= No_Error_Msg
;
1738 Last_Error_Msg
:= No_Error_Msg
;
1739 Serious_Errors_Detected
:= 0;
1740 Total_Errors_Detected
:= 0;
1741 Cur_Msg
:= No_Error_Msg
;
1744 -- Reset counts for warnings
1748 -- Initialize warnings tables
1751 Specific_Warnings
.Init
;
1754 -------------------------------
1755 -- Is_Size_Too_Small_Message --
1756 -------------------------------
1758 function Is_Size_Too_Small_Message
(S
: String) return Boolean is
1759 Size_For
: constant String := "size for";
1760 pragma Assert
(Size_Too_Small_Message
(1 .. Size_For
'Last) = Size_For
);
1761 -- Assert that Size_Too_Small_Message starts with Size_For
1763 return S
'Length >= Size_For
'Length
1764 and then S
(S
'First .. S
'First + Size_For
'Length - 1) = Size_For
;
1765 -- True if S starts with Size_For
1766 end Is_Size_Too_Small_Message
;
1772 function No_Warnings
(N
: Node_Or_Entity_Id
) return Boolean is
1774 if Error_Posted
(N
) then
1777 elsif Nkind
(N
) in N_Entity
and then Has_Warnings_Off
(N
) then
1780 elsif Is_Entity_Name
(N
)
1781 and then Present
(Entity
(N
))
1782 and then Has_Warnings_Off
(Entity
(N
))
1795 function OK_Node
(N
: Node_Id
) return Boolean is
1796 K
: constant Node_Kind
:= Nkind
(N
);
1799 if Error_Posted
(N
) then
1802 elsif K
in N_Has_Etype
1803 and then Present
(Etype
(N
))
1804 and then Error_Posted
(Etype
(N
))
1809 or else K
= N_Attribute_Reference
1810 or else K
= N_Character_Literal
1811 or else K
= N_Expanded_Name
1812 or else K
= N_Identifier
1813 or else K
= N_Operator_Symbol
)
1814 and then Present
(Entity
(N
))
1815 and then Error_Posted
(Entity
(N
))
1823 ---------------------
1824 -- Output_Messages --
1825 ---------------------
1827 procedure Output_Messages
is
1829 -- Local subprograms
1831 procedure Write_Error_Summary
;
1832 -- Write error summary
1834 procedure Write_Header
(Sfile
: Source_File_Index
);
1835 -- Write header line (compiling or checking given file)
1837 procedure Write_Max_Errors
;
1838 -- Write message if max errors reached
1840 procedure Write_Source_Code_Line
(Loc
: Source_Ptr
);
1841 -- Write the source code line corresponding to Loc, as follows:
1843 -- line | actual code line here with Loc somewhere
1846 -- where the carret on the last line points to location Loc.
1848 -------------------------
1849 -- Write_Error_Summary --
1850 -------------------------
1852 procedure Write_Error_Summary
is
1854 -- Extra blank line if error messages or source listing were output
1856 if Total_Errors_Detected
+ Warnings_Detected
> 0 or else Full_List
1861 -- Message giving number of lines read and number of errors detected.
1862 -- This normally goes to Standard_Output. The exception is when brief
1863 -- mode is not set, verbose mode (or full list mode) is set, and
1864 -- there are errors. In this case we send the message to standard
1865 -- error to make sure that *something* appears on standard error
1866 -- in an error situation.
1868 if Total_Errors_Detected
+ Warnings_Detected
/= 0
1869 and then not Brief_Output
1870 and then (Verbose_Mode
or Full_List
)
1875 -- Message giving total number of lines. Don't give this message if
1876 -- the Main_Source line is unknown (this happens in error situations,
1877 -- e.g. when integrated preprocessing fails).
1879 if Main_Source_File
> No_Source_File
then
1881 Write_Int
(Num_Source_Lines
(Main_Source_File
));
1883 if Num_Source_Lines
(Main_Source_File
) = 1 then
1884 Write_Str
(" line: ");
1886 Write_Str
(" lines: ");
1890 if Total_Errors_Detected
= 0 then
1891 Write_Str
("No errors");
1893 elsif Total_Errors_Detected
= 1 then
1894 Write_Str
("1 error");
1897 Write_Int
(Total_Errors_Detected
);
1898 Write_Str
(" errors");
1901 -- We now need to output warnings. When using -gnatwe, all warnings
1902 -- should be treated as errors, except for warnings originating from
1903 -- the use of the Compile_Time_Warning pragma. Another situation
1904 -- where a warning might be treated as an error is when the source
1905 -- code contains a Warning_As_Error pragma.
1906 -- When warnings are treated as errors, we still log them as
1907 -- warnings, but we add a message denoting how many of these warnings
1911 Warnings_Count
: constant Int
:=
1912 Warnings_Detected
- Warning_Info_Messages
;
1914 Compile_Time_Warnings
: Int
;
1915 -- Number of warnings that come from a Compile_Time_Warning
1918 Non_Compile_Time_Warnings
: Int
;
1919 -- Number of warnings that do not come from a Compile_Time_Warning
1923 if Warnings_Count
> 0 then
1925 Write_Int
(Warnings_Count
);
1926 Write_Str
(" warning");
1928 if Warnings_Count
> 1 then
1932 Compile_Time_Warnings
:= Count_Compile_Time_Pragma_Warnings
;
1933 Non_Compile_Time_Warnings
:=
1934 Warnings_Count
- Compile_Time_Warnings
;
1936 if Warning_Mode
= Treat_As_Error
1937 and then Non_Compile_Time_Warnings
> 0
1941 if Compile_Time_Warnings
> 0 then
1942 Write_Int
(Non_Compile_Time_Warnings
);
1946 Write_Str
("treated as error");
1948 if Non_Compile_Time_Warnings
> 1 then
1954 elsif Warnings_Treated_As_Errors
> 0 then
1957 if Warnings_Treated_As_Errors
/= Warnings_Count
then
1958 Write_Int
(Warnings_Treated_As_Errors
);
1962 Write_Str
("treated as error");
1964 if Warnings_Treated_As_Errors
> 1 then
1973 if Warning_Info_Messages
+ Report_Info_Messages
/= 0 then
1975 Write_Int
(Warning_Info_Messages
+ Report_Info_Messages
);
1976 Write_Str
(" info message");
1978 if Warning_Info_Messages
+ Report_Info_Messages
> 1 then
1984 Set_Standard_Output
;
1985 end Write_Error_Summary
;
1991 procedure Write_Header
(Sfile
: Source_File_Index
) is
1993 if Verbose_Mode
or Full_List
then
1994 if Original_Operating_Mode
= Generate_Code
then
1995 Write_Str
("Compiling: ");
1997 Write_Str
("Checking: ");
2000 Write_Name
(Full_File_Name
(Sfile
));
2002 if not Debug_Flag_7
then
2004 Write_Str
("Source file time stamp: ");
2005 Write_Time_Stamp
(Sfile
);
2007 Write_Str
("Compiled at: " & Compilation_Time
);
2014 ----------------------
2015 -- Write_Max_Errors --
2016 ----------------------
2018 procedure Write_Max_Errors
is
2020 if Maximum_Messages
/= 0 then
2021 if Warnings_Detected
>= Maximum_Messages
then
2023 Write_Line
("maximum number of warnings output");
2024 Write_Line
("any further warnings suppressed");
2025 Set_Standard_Output
;
2028 -- If too many errors print message
2030 if Total_Errors_Detected
>= Maximum_Messages
then
2032 Write_Line
("fatal error: maximum number of errors detected");
2033 Set_Standard_Output
;
2036 end Write_Max_Errors
;
2038 ----------------------------
2039 -- Write_Source_Code_Line --
2040 ----------------------------
2042 procedure Write_Source_Code_Line
(Loc
: Source_Ptr
) is
2044 function Image
(X
: Positive; Width
: Positive) return String;
2045 -- Output number X over Width characters, with whitespace padding.
2046 -- Only output the low-order Width digits of X, if X is larger than
2053 function Image
(X
: Positive; Width
: Positive) return String is
2054 Str
: String (1 .. Width
);
2055 Curr
: Natural := X
;
2057 for J
in reverse 1 .. Width
loop
2059 Str
(J
) := Character'Val (Character'Pos ('0') + Curr
mod 10);
2071 Line
: constant Pos
:= Pos
(Get_Physical_Line_Number
(Loc
));
2072 Col
: constant Natural := Natural (Get_Column_Number
(Loc
));
2073 Width
: constant := 5;
2075 Buf
: Source_Buffer_Ptr
;
2076 Cur_Loc
: Source_Ptr
:= Loc
;
2078 -- Start of processing for Write_Source_Code_Line
2081 if Loc
>= First_Source_Ptr
then
2082 Buf
:= Source_Text
(Get_Source_File_Index
(Loc
));
2084 -- First line with the actual source code line
2086 Write_Str
(Image
(Positive (Line
), Width
=> Width
));
2088 Write_Str
(String (Buf
(Loc
- Source_Ptr
(Col
) + 1 .. Loc
- 1)));
2090 while Cur_Loc
<= Buf
'Last
2091 and then Buf
(Cur_Loc
) /= ASCII
.LF
2093 Write_Char
(Buf
(Cur_Loc
));
2094 Cur_Loc
:= Cur_Loc
+ 1;
2099 -- Second line with carret sign pointing to location Loc
2101 Write_Str
(String'(1 .. Width => ' '));
2103 Write_Str (String'(1 .. Col
- 1 => ' '));
2104 Write_Str
("^ here");
2107 end Write_Source_Code_Line
;
2113 Use_Prefix
: Boolean;
2115 -- Start of processing for Output_Messages
2118 -- Error if Finalize has not been called
2120 if not Finalize_Called
then
2121 raise Program_Error
;
2124 -- Reset current error source file if the main unit has a pragma
2125 -- Source_Reference. This ensures outputting the proper name of
2126 -- the source file in this situation.
2128 if Main_Source_File
<= No_Source_File
2129 or else Num_SRef_Pragmas
(Main_Source_File
) /= 0
2131 Current_Error_Source_File
:= No_Source_File
;
2136 if Brief_Output
or (not Full_List
and not Verbose_Mode
) then
2139 E
:= First_Error_Msg
;
2140 while E
/= No_Error_Msg
loop
2142 -- If -gnatdF is used, separate main messages from previous
2143 -- messages with a newline (unless it is an info message) and
2144 -- make continuation messages follow the main message with only
2145 -- an indentation of two space characters, without repeating
2146 -- file:line:col: prefix.
2149 not (Debug_Flag_FF
and then Errors
.Table
(E
).Msg_Cont
);
2151 if not Errors
.Table
(E
).Deleted
and then not Debug_Flag_KK
then
2153 if Debug_Flag_FF
then
2154 if Errors
.Table
(E
).Msg_Cont
then
2156 elsif not Errors
.Table
(E
).Info
then
2162 if Full_Path_Name_For_Brief_Errors
then
2163 Write_Name
(Full_Ref_Name
(Errors
.Table
(E
).Sfile
));
2165 Write_Name
(Reference_Name
(Errors
.Table
(E
).Sfile
));
2169 Write_Int
(Int
(Physical_To_Logical
2170 (Errors
.Table
(E
).Line
,
2171 Errors
.Table
(E
).Sfile
)));
2174 if Errors
.Table
(E
).Col
< 10 then
2178 Write_Int
(Int
(Errors
.Table
(E
).Col
));
2182 Output_Msg_Text
(E
);
2185 -- If -gnatdF is used, write the source code line corresponding
2186 -- to the location of the main message (unless it is an info
2187 -- message). Also write the source code line corresponding to
2188 -- an insertion location inside continuation messages.
2191 and then not Errors
.Table
(E
).Info
2193 if Errors
.Table
(E
).Msg_Cont
then
2195 Loc
: constant Source_Ptr
:=
2196 Errors
.Table
(E
).Insertion_Sloc
;
2198 if Loc
/= No_Location
then
2199 Write_Source_Code_Line
(Loc
);
2204 Write_Source_Code_Line
(Errors
.Table
(E
).Sptr
);
2209 E
:= Errors
.Table
(E
).Next
;
2212 Set_Standard_Output
;
2215 -- Full source listing case
2218 List_Pragmas_Index
:= 1;
2219 List_Pragmas_Mode
:= True;
2220 E
:= First_Error_Msg
;
2222 -- Normal case, to stdout (copyright notice already output)
2224 if Full_List_File_Name
= null then
2225 if not Debug_Flag_7
then
2232 Create_List_File_Access
.all (Full_List_File_Name
.all);
2233 Set_Special_Output
(Write_List_Info_Access
.all'Access);
2235 -- Write copyright notice to file
2237 if not Debug_Flag_7
then
2238 Write_Str
("GNAT ");
2239 Write_Str
(Gnat_Version_String
);
2241 Write_Str
("Copyright 1992-" &
2243 ", Free Software Foundation, Inc.");
2248 -- First list extended main source file units with errors
2250 for U
in Main_Unit
.. Last_Unit
loop
2251 if In_Extended_Main_Source_Unit
(Cunit_Entity
(U
))
2253 -- If debug flag d.m is set, only the main source is listed
2255 and then (U
= Main_Unit
or else not Debug_Flag_Dot_M
)
2257 -- If the unit of the entity does not come from source, it is
2258 -- an implicit subprogram declaration for a child subprogram.
2259 -- Do not emit errors for it, they are listed with the body.
2262 (No
(Cunit_Entity
(U
))
2263 or else Comes_From_Source
(Cunit_Entity
(U
))
2264 or else not Is_Subprogram
(Cunit_Entity
(U
)))
2266 -- If the compilation unit associated with this unit does not
2267 -- come from source, it means it is an instantiation that should
2268 -- not be included in the source listing.
2270 and then Comes_From_Source
(Cunit
(U
))
2273 Sfile
: constant Source_File_Index
:= Source_Index
(U
);
2278 -- Only write the header if Sfile is known
2280 if Sfile
> No_Source_File
then
2281 Write_Header
(Sfile
);
2285 -- Normally, we don't want an "error messages from file"
2286 -- message when listing the entire file, so we set the
2287 -- current source file as the current error source file.
2288 -- However, the old style of doing things was to list this
2289 -- message if pragma Source_Reference is present, even for
2290 -- the main unit. Since the purpose of the -gnatd.m switch
2291 -- is to duplicate the old behavior, we skip the reset if
2292 -- this debug flag is set.
2294 if not Debug_Flag_Dot_M
then
2295 Current_Error_Source_File
:= Sfile
;
2298 -- Only output the listing if Sfile is known, to avoid
2299 -- crashing the compiler.
2301 if Sfile
> No_Source_File
then
2302 for N
in 1 .. Last_Source_Line
(Sfile
) loop
2303 while E
/= No_Error_Msg
2304 and then Errors
.Table
(E
).Deleted
2306 E
:= Errors
.Table
(E
).Next
;
2311 and then Errors
.Table
(E
).Line
= N
2312 and then Errors
.Table
(E
).Sfile
= Sfile
;
2314 Output_Source_Line
(N
, Sfile
, Err_Flag
);
2317 Output_Error_Msgs
(E
);
2319 if not Debug_Flag_2
then
2329 -- Then output errors, if any, for subsidiary units not in the
2330 -- main extended unit.
2332 -- Note: if debug flag d.m set, include errors for any units other
2333 -- than the main unit in the extended source unit (e.g. spec and
2334 -- subunits for a body).
2336 while E
/= No_Error_Msg
2337 and then (not In_Extended_Main_Source_Unit
(Errors
.Table
(E
).Sptr
)
2340 and then Get_Source_Unit
2341 (Errors
.Table
(E
).Sptr
) /= Main_Unit
))
2343 if Errors
.Table
(E
).Deleted
then
2344 E
:= Errors
.Table
(E
).Next
;
2349 (Errors
.Table
(E
).Line
, Errors
.Table
(E
).Sfile
, True);
2350 Output_Error_Msgs
(E
);
2354 -- If output to file, write extra copy of error summary to the
2355 -- output file, and then close it.
2357 if Full_List_File_Name
/= null then
2358 Write_Error_Summary
;
2360 Close_List_File_Access
.all;
2361 Cancel_Special_Output
;
2365 -- Verbose mode (error lines only with error flags). Normally this is
2366 -- ignored in full list mode, unless we are listing to a file, in which
2367 -- case we still generate -gnatv output to standard output.
2370 and then (not Full_List
or else Full_List_File_Name
/= null)
2374 -- Output the header only when Main_Source_File is known
2376 if Main_Source_File
> No_Source_File
then
2377 Write_Header
(Main_Source_File
);
2380 E
:= First_Error_Msg
;
2382 -- Loop through error lines
2384 while E
/= No_Error_Msg
loop
2385 if Errors
.Table
(E
).Deleted
then
2386 E
:= Errors
.Table
(E
).Next
;
2390 (Errors
.Table
(E
).Line
, Errors
.Table
(E
).Sfile
, True);
2391 Output_Error_Msgs
(E
);
2396 -- Output error summary if verbose or full list mode
2398 if Verbose_Mode
or else Full_List
then
2399 Write_Error_Summary
;
2404 -- Even though Warning_Info_Messages are a subclass of warnings, they
2405 -- must not be treated as errors when -gnatwe is in effect.
2407 if Warning_Mode
= Treat_As_Error
then
2409 Compile_Time_Pragma_Warnings
: constant Int
:=
2410 Count_Compile_Time_Pragma_Warnings
;
2412 Total_Errors_Detected
:= Total_Errors_Detected
+ Warnings_Detected
2413 - Warning_Info_Messages
- Compile_Time_Pragma_Warnings
;
2414 Warnings_Detected
:=
2415 Warning_Info_Messages
+ Compile_Time_Pragma_Warnings
;
2418 end Output_Messages
;
2420 ------------------------
2421 -- Output_Source_Line --
2422 ------------------------
2424 procedure Output_Source_Line
2425 (L
: Physical_Line_Number
;
2426 Sfile
: Source_File_Index
;
2432 Line_Number_Output
: Boolean := False;
2433 -- Set True once line number is output
2435 Empty_Line
: Boolean := True;
2436 -- Set False if line includes at least one character
2439 if Sfile
/= Current_Error_Source_File
then
2440 Write_Str
("==============Error messages for ");
2442 case Sinput
.File_Type
(Sfile
) is
2444 Write_Str
("source");
2446 when Sinput
.Config
=>
2447 Write_Str
("configuration pragmas");
2450 Write_Str
("symbol definition");
2452 when Sinput
.Preproc
=>
2453 Write_Str
("preprocessing data");
2456 Write_Str
(" file: ");
2457 Write_Name
(Full_File_Name
(Sfile
));
2460 if Num_SRef_Pragmas
(Sfile
) > 0 then
2461 Write_Str
("--------------Line numbers from file: ");
2462 Write_Name
(Full_Ref_Name
(Sfile
));
2463 Write_Str
(" (starting at line ");
2464 Write_Int
(Int
(First_Mapped_Line
(Sfile
)));
2469 Current_Error_Source_File
:= Sfile
;
2472 if Errs
or List_Pragmas_Mode
then
2473 Output_Line_Number
(Physical_To_Logical
(L
, Sfile
));
2474 Line_Number_Output
:= True;
2477 S
:= Line_Start
(L
, Sfile
);
2480 C
:= Source_Text
(Sfile
) (S
);
2481 exit when C
= ASCII
.LF
or else C
= ASCII
.CR
or else C
= EOF
;
2483 -- Deal with matching entry in List_Pragmas table
2486 and then List_Pragmas_Index
<= List_Pragmas
.Last
2487 and then S
= List_Pragmas
.Table
(List_Pragmas_Index
).Ploc
2489 case List_Pragmas
.Table
(List_Pragmas_Index
).Ptyp
is
2493 -- Ignore if on line with errors so that error flags
2494 -- get properly listed with the error line .
2497 Write_Char
(ASCII
.FF
);
2501 List_Pragmas_Mode
:= True;
2503 if not Line_Number_Output
then
2504 Output_Line_Number
(Physical_To_Logical
(L
, Sfile
));
2505 Line_Number_Output
:= True;
2512 List_Pragmas_Mode
:= False;
2515 List_Pragmas_Index
:= List_Pragmas_Index
+ 1;
2517 -- Normal case (no matching entry in List_Pragmas table)
2520 if Errs
or List_Pragmas_Mode
then
2525 Empty_Line
:= False;
2529 -- If we have output a source line, then add the line terminator, with
2530 -- training spaces preserved (so we output the line exactly as input).
2532 if Line_Number_Output
then
2536 Write_Eol_Keep_Blanks
;
2539 end Output_Source_Line
;
2541 -----------------------------
2542 -- Remove_Warning_Messages --
2543 -----------------------------
2545 procedure Remove_Warning_Messages
(N
: Node_Id
) is
2547 function Check_For_Warning
(N
: Node_Id
) return Traverse_Result
;
2548 -- This function checks one node for a possible warning message
2550 function Check_All_Warnings
is new Traverse_Func
(Check_For_Warning
);
2551 -- This defines the traversal operation
2553 -----------------------
2554 -- Check_For_Warning --
2555 -----------------------
2557 function Check_For_Warning
(N
: Node_Id
) return Traverse_Result
is
2558 Loc
: constant Source_Ptr
:= Sloc
(N
);
2561 function To_Be_Removed
(E
: Error_Msg_Id
) return Boolean;
2562 -- Returns True for a message that is to be removed. Also adjusts
2563 -- warning count appropriately.
2569 function To_Be_Removed
(E
: Error_Msg_Id
) return Boolean is
2571 if E
/= No_Error_Msg
2573 -- Don't remove if location does not match
2575 and then Errors
.Table
(E
).Optr
= Loc
2577 -- Don't remove if not warning/info message. Note that we do
2578 -- not remove style messages here. They are warning messages
2579 -- but not ones we want removed in this context.
2581 and then Errors
.Table
(E
).Warn
2583 -- Don't remove unconditional messages
2585 and then not Errors
.Table
(E
).Uncond
2587 Warnings_Detected
:= Warnings_Detected
- 1;
2589 if Errors
.Table
(E
).Info
then
2590 Warning_Info_Messages
:= Warning_Info_Messages
- 1;
2595 -- No removal required
2602 -- Start of processing for Check_For_Warnings
2605 while To_Be_Removed
(First_Error_Msg
) loop
2606 First_Error_Msg
:= Errors
.Table
(First_Error_Msg
).Next
;
2609 if First_Error_Msg
= No_Error_Msg
then
2610 Last_Error_Msg
:= No_Error_Msg
;
2613 E
:= First_Error_Msg
;
2614 while E
/= No_Error_Msg
loop
2615 while To_Be_Removed
(Errors
.Table
(E
).Next
) loop
2616 Errors
.Table
(E
).Next
:=
2617 Errors
.Table
(Errors
.Table
(E
).Next
).Next
;
2619 if Errors
.Table
(E
).Next
= No_Error_Msg
then
2620 Last_Error_Msg
:= E
;
2624 E
:= Errors
.Table
(E
).Next
;
2627 if Nkind
(N
) = N_Raise_Constraint_Error
2628 and then Is_Rewrite_Substitution
(N
)
2629 and then No
(Condition
(N
))
2631 -- Warnings may have been posted on subexpressions of the original
2632 -- tree. We place the original node back on the tree to remove
2633 -- those warnings, whose sloc do not match those of any node in
2634 -- the current tree. Given that we are in unreachable code, this
2635 -- modification to the tree is harmless.
2638 Status
: Traverse_Final_Result
;
2641 if Is_List_Member
(N
) then
2642 Set_Condition
(N
, Original_Node
(N
));
2643 Status
:= Check_All_Warnings
(Condition
(N
));
2645 Rewrite
(N
, Original_Node
(N
));
2646 Status
:= Check_All_Warnings
(N
);
2655 end Check_For_Warning
;
2657 -- Start of processing for Remove_Warning_Messages
2660 if Warnings_Detected
/= 0 then
2662 Discard
: Traverse_Final_Result
;
2663 pragma Warnings
(Off
, Discard
);
2666 Discard
:= Check_All_Warnings
(N
);
2669 end Remove_Warning_Messages
;
2671 procedure Remove_Warning_Messages
(L
: List_Id
) is
2674 if Is_Non_Empty_List
(L
) then
2676 while Present
(Stat
) loop
2677 Remove_Warning_Messages
(Stat
);
2681 end Remove_Warning_Messages
;
2683 --------------------
2684 -- Reset_Warnings --
2685 --------------------
2687 procedure Reset_Warnings
is
2689 Warnings_Treated_As_Errors
:= 0;
2690 Warnings_Detected
:= 0;
2691 Warning_Info_Messages
:= 0;
2692 Warnings_As_Errors_Count
:= 0;
2695 ----------------------
2696 -- Adjust_Name_Case --
2697 ----------------------
2699 procedure Adjust_Name_Case
2700 (Buf
: in out Bounded_String
;
2704 -- We have an all lower case name from Namet, and now we want to set
2705 -- the appropriate case. If possible we copy the actual casing from
2706 -- the source. If not we use standard identifier casing.
2709 Src_Ind
: constant Source_File_Index
:= Get_Source_File_Index
(Loc
);
2710 Sbuffer
: Source_Buffer_Ptr
;
2712 Src_Ptr
: Source_Ptr
;
2718 -- For standard locations, always use mixed case
2720 if Loc
<= No_Location
then
2721 Set_Casing
(Mixed_Case
);
2724 -- Determine if the reference we are dealing with corresponds to
2725 -- text at the point of the error reference. This will often be
2726 -- the case for simple identifier references, and is the case
2727 -- where we can copy the casing from the source.
2729 Sbuffer
:= Source_Text
(Src_Ind
);
2731 while Ref_Ptr
<= Buf
.Length
loop
2733 Fold_Lower
(Sbuffer
(Src_Ptr
)) /=
2734 Fold_Lower
(Buf
.Chars
(Ref_Ptr
));
2735 Ref_Ptr
:= Ref_Ptr
+ 1;
2736 Src_Ptr
:= Src_Ptr
+ 1;
2739 -- If we get through the loop without a mismatch, then output the
2740 -- name the way it is cased in the source program
2742 if Ref_Ptr
> Buf
.Length
then
2745 for J
in 1 .. Buf
.Length
loop
2746 Buf
.Chars
(J
) := Sbuffer
(Src_Ptr
);
2747 Src_Ptr
:= Src_Ptr
+ 1;
2750 -- Otherwise set the casing using the default identifier casing
2753 Set_Casing
(Buf
, Identifier_Casing
(Src_Ind
));
2757 end Adjust_Name_Case
;
2759 procedure Adjust_Name_Case
(Loc
: Source_Ptr
) is
2761 Adjust_Name_Case
(Global_Name_Buffer
, Loc
);
2762 end Adjust_Name_Case
;
2764 ---------------------------
2765 -- Set_Identifier_Casing --
2766 ---------------------------
2768 procedure Set_Identifier_Casing
2769 (Identifier_Name
: System
.Address
;
2770 File_Name
: System
.Address
)
2772 Ident
: constant Big_String_Ptr
:= To_Big_String_Ptr
(Identifier_Name
);
2773 File
: constant Big_String_Ptr
:= To_Big_String_Ptr
(File_Name
);
2776 Desired_Case
: Casing_Type
:= Mixed_Case
;
2777 -- Casing required for result. Default value of Mixed_Case is used if
2778 -- for some reason we cannot find the right file name in the table.
2781 -- Get length of file name
2784 while File
(Flen
+ 1) /= ASCII
.NUL
loop
2788 -- Loop through file names to find matching one. This is a bit slow, but
2789 -- we only do it in error situations so it is not so terrible. Note that
2790 -- if the loop does not exit, then the desired case will be left set to
2791 -- Mixed_Case, this can happen if the name was not in canonical form.
2793 for J
in 1 .. Last_Source_File
loop
2794 Get_Name_String
(Full_Debug_Name
(J
));
2797 and then Name_Buffer
(1 .. Name_Len
) = String (File
(1 .. Flen
))
2799 Desired_Case
:= Identifier_Casing
(J
);
2804 -- Copy identifier as given to Name_Buffer
2806 for J
in Name_Buffer
'Range loop
2807 Name_Buffer
(J
) := Ident
(J
);
2809 if Name_Buffer
(J
) = ASCII
.NUL
then
2815 Set_Casing
(Desired_Case
);
2816 end Set_Identifier_Casing
;
2818 -----------------------
2819 -- Set_Ignore_Errors --
2820 -----------------------
2822 procedure Set_Ignore_Errors
(To
: Boolean) is
2824 Errors_Must_Be_Ignored
:= To
;
2825 end Set_Ignore_Errors
;
2827 ------------------------------
2828 -- Set_Msg_Insertion_Column --
2829 ------------------------------
2831 procedure Set_Msg_Insertion_Column
is
2833 if RM_Column_Check
then
2834 Set_Msg_Str
(" in column ");
2835 Set_Msg_Int
(Int
(Error_Msg_Col
) + 1);
2837 end Set_Msg_Insertion_Column
;
2839 ----------------------------
2840 -- Set_Msg_Insertion_Node --
2841 ----------------------------
2843 procedure Set_Msg_Insertion_Node
is
2848 Error_Msg_Node_1
= Error
2849 or else Error_Msg_Node_1
= Any_Type
;
2851 if Error_Msg_Node_1
= Empty
then
2852 Set_Msg_Blank_Conditional
;
2853 Set_Msg_Str
("<empty>");
2855 elsif Error_Msg_Node_1
= Error
then
2857 Set_Msg_Str
("<error>");
2859 elsif Error_Msg_Node_1
= Standard_Void_Type
then
2861 Set_Msg_Str
("procedure name");
2863 elsif Nkind
(Error_Msg_Node_1
) in N_Entity
2864 and then Ekind
(Error_Msg_Node_1
) = E_Anonymous_Access_Subprogram_Type
2867 Set_Msg_Str
("access to subprogram");
2870 Set_Msg_Blank_Conditional
;
2874 K
:= Nkind
(Error_Msg_Node_1
);
2876 -- If we have operator case, skip quotes since name of operator
2877 -- itself will supply the required quotations. An operator can be an
2878 -- applied use in an expression or an explicit operator symbol, or an
2879 -- identifier whose name indicates it is an operator.
2882 or else K
= N_Operator_Symbol
2883 or else K
= N_Defining_Operator_Symbol
2884 or else ((K
= N_Identifier
or else K
= N_Defining_Identifier
)
2885 and then Is_Operator_Name
(Chars
(Error_Msg_Node_1
)))
2887 Set_Msg_Node
(Error_Msg_Node_1
);
2889 -- Normal case, not an operator, surround with quotes
2893 Set_Qualification
(Error_Msg_Qual_Level
, Error_Msg_Node_1
);
2894 Set_Msg_Node
(Error_Msg_Node_1
);
2899 -- The following assignment ensures that a second ampersand insertion
2900 -- character will correspond to the Error_Msg_Node_2 parameter. We
2901 -- suppress possible validity checks in case operating in -gnatVa mode,
2902 -- and Error_Msg_Node_2 is not needed and has not been set.
2905 pragma Suppress
(Range_Check
);
2907 Error_Msg_Node_1
:= Error_Msg_Node_2
;
2909 end Set_Msg_Insertion_Node
;
2911 --------------------------------------
2912 -- Set_Msg_Insertion_Type_Reference --
2913 --------------------------------------
2915 procedure Set_Msg_Insertion_Type_Reference
(Flag
: Source_Ptr
) is
2921 if Error_Msg_Node_1
= Standard_Void_Type
then
2922 Set_Msg_Str
("package or procedure name");
2925 elsif Error_Msg_Node_1
= Standard_Exception_Type
then
2926 Set_Msg_Str
("exception name");
2929 elsif Error_Msg_Node_1
= Any_Access
2930 or else Error_Msg_Node_1
= Any_Array
2931 or else Error_Msg_Node_1
= Any_Boolean
2932 or else Error_Msg_Node_1
= Any_Character
2933 or else Error_Msg_Node_1
= Any_Composite
2934 or else Error_Msg_Node_1
= Any_Discrete
2935 or else Error_Msg_Node_1
= Any_Fixed
2936 or else Error_Msg_Node_1
= Any_Integer
2937 or else Error_Msg_Node_1
= Any_Modular
2938 or else Error_Msg_Node_1
= Any_Numeric
2939 or else Error_Msg_Node_1
= Any_Real
2940 or else Error_Msg_Node_1
= Any_Scalar
2941 or else Error_Msg_Node_1
= Any_String
2943 Get_Unqualified_Decoded_Name_String
(Chars
(Error_Msg_Node_1
));
2944 Set_Msg_Name_Buffer
;
2947 elsif Error_Msg_Node_1
= Universal_Real
then
2948 Set_Msg_Str
("type universal real");
2951 elsif Error_Msg_Node_1
= Universal_Integer
then
2952 Set_Msg_Str
("type universal integer");
2955 elsif Error_Msg_Node_1
= Universal_Fixed
then
2956 Set_Msg_Str
("type universal fixed");
2960 -- Special case of anonymous array
2962 if Nkind
(Error_Msg_Node_1
) in N_Entity
2963 and then Is_Array_Type
(Error_Msg_Node_1
)
2964 and then Present
(Related_Array_Object
(Error_Msg_Node_1
))
2966 Set_Msg_Str
("type of ");
2967 Set_Msg_Node
(Related_Array_Object
(Error_Msg_Node_1
));
2968 Set_Msg_Str
(" declared");
2969 Set_Msg_Insertion_Line_Number
2970 (Sloc
(Related_Array_Object
(Error_Msg_Node_1
)), Flag
);
2974 -- If we fall through, it is not a special case, so first output
2975 -- the name of the type, preceded by private for a private type
2977 if Is_Private_Type
(Error_Msg_Node_1
) then
2978 Set_Msg_Str
("private type ");
2980 Set_Msg_Str
("type ");
2983 Ent
:= Error_Msg_Node_1
;
2985 if Is_Internal_Name
(Chars
(Ent
)) then
2986 Unwind_Internal_Type
(Ent
);
2989 -- Types in Standard are displayed as "Standard.name"
2991 if Sloc
(Ent
) <= Standard_Location
then
2993 Set_Msg_Str
("Standard.");
2998 -- Types in other language defined units are displayed as
2999 -- "package-name.type-name"
3001 elsif Is_Predefined_Unit
(Get_Source_Unit
(Ent
)) then
3002 Get_Unqualified_Decoded_Name_String
3003 (Unit_Name
(Get_Source_Unit
(Ent
)));
3004 Name_Len
:= Name_Len
- 2;
3005 Set_Msg_Blank_Conditional
;
3007 Set_Casing
(Mixed_Case
);
3008 Set_Msg_Name_Buffer
;
3010 Set_Casing
(Mixed_Case
);
3015 -- All other types display as "type name" defined at line xxx
3016 -- possibly qualified if qualification is requested.
3020 Set_Qualification
(Error_Msg_Qual_Level
, Ent
);
3024 -- If we did not print a name (e.g. in the case of an anonymous
3025 -- subprogram type), there is no name to print, so remove quotes.
3027 if Buffer_Ends_With
('"') then
3028 Buffer_Remove
('"');
3034 -- If the original type did not come from a predefined file, add the
3035 -- location where the type was defined.
3037 if Sloc
(Error_Msg_Node_1
) > Standard_Location
3039 not Is_Predefined_Unit
(Get_Source_Unit
(Error_Msg_Node_1
))
3041 Get_Name_String
(Unit_File_Name
(Get_Source_Unit
(Error_Msg_Node_1
)));
3042 Set_Msg_Str
(" defined");
3043 Set_Msg_Insertion_Line_Number
(Sloc
(Error_Msg_Node_1
), Flag
);
3045 -- If it did come from a predefined file, deal with the case where
3046 -- this was a file with a generic instantiation from elsewhere.
3049 if Sloc
(Error_Msg_Node_1
) > Standard_Location
then
3051 Iloc
: constant Source_Ptr
:=
3052 Instantiation_Location
(Sloc
(Error_Msg_Node_1
));
3055 if Iloc
/= No_Location
3056 and then not Suppress_Instance_Location
3058 Set_Msg_Str
(" from instance");
3059 Set_Msg_Insertion_Line_Number
(Iloc
, Flag
);
3064 end Set_Msg_Insertion_Type_Reference
;
3066 ---------------------------------
3067 -- Set_Msg_Insertion_Unit_Name --
3068 ---------------------------------
3070 procedure Set_Msg_Insertion_Unit_Name
(Suffix
: Boolean := True) is
3072 if Error_Msg_Unit_1
= No_Unit_Name
then
3075 elsif Error_Msg_Unit_1
= Error_Unit_Name
then
3077 Set_Msg_Str
("<error>");
3080 Get_Unit_Name_String
(Error_Msg_Unit_1
, Suffix
);
3083 Set_Msg_Name_Buffer
;
3087 -- The following assignment ensures that a second percent insertion
3088 -- character will correspond to the Error_Msg_Unit_2 parameter. We
3089 -- suppress possible validity checks in case operating in -gnatVa mode,
3090 -- and Error_Msg_Unit_2 is not needed and has not been set.
3093 pragma Suppress
(Range_Check
);
3095 Error_Msg_Unit_1
:= Error_Msg_Unit_2
;
3097 end Set_Msg_Insertion_Unit_Name
;
3103 procedure Set_Msg_Node
(Node
: Node_Id
) is
3109 case Nkind
(Node
) is
3110 when N_Designator
=>
3111 Set_Msg_Node
(Name
(Node
));
3113 Set_Msg_Node
(Identifier
(Node
));
3116 when N_Defining_Program_Unit_Name
=>
3117 Set_Msg_Node
(Name
(Node
));
3119 Set_Msg_Node
(Defining_Identifier
(Node
));
3122 when N_Expanded_Name
3123 | N_Selected_Component
3125 Set_Msg_Node
(Prefix
(Node
));
3127 Set_Msg_Node
(Selector_Name
(Node
));
3134 -- The only remaining possibilities are identifiers, defining
3135 -- identifiers, pragmas, and pragma argument associations.
3137 if Nkind
(Node
) = N_Pragma
then
3138 Nam
:= Pragma_Name
(Node
);
3141 -- The other cases have Chars fields
3143 -- First deal with internal names, which generally represent something
3144 -- gone wrong. First attempt: if this is a rewritten node that rewrites
3145 -- something with a Chars field that is not an internal name, use that.
3147 elsif Is_Internal_Name
(Chars
(Node
))
3148 and then Nkind
(Original_Node
(Node
)) in N_Has_Chars
3149 and then not Is_Internal_Name
(Chars
(Original_Node
(Node
)))
3151 Nam
:= Chars
(Original_Node
(Node
));
3152 Loc
:= Sloc
(Original_Node
(Node
));
3154 -- Another shot for internal names, in the case of internal type names,
3155 -- we try to find a reasonable representation for the external name.
3157 elsif Is_Internal_Name
(Chars
(Node
))
3159 ((Is_Entity_Name
(Node
)
3160 and then Present
(Entity
(Node
))
3161 and then Is_Type
(Entity
(Node
)))
3163 (Nkind
(Node
) = N_Defining_Identifier
and then Is_Type
(Node
)))
3165 if Nkind
(Node
) = N_Identifier
then
3166 Ent
:= Entity
(Node
);
3173 -- If the type is the designated type of an access_to_subprogram,
3174 -- then there is no name to provide in the call.
3176 if Ekind
(Ent
) = E_Subprogram_Type
then
3179 -- Otherwise, we will be able to find some kind of name to output
3182 Unwind_Internal_Type
(Ent
);
3186 -- If not internal name, or if we could not find a reasonable possible
3187 -- substitution for the internal name, just use name in Chars field.
3190 Nam
:= Chars
(Node
);
3194 -- At this stage, the name to output is in Nam
3196 Get_Unqualified_Decoded_Name_String
(Nam
);
3198 -- Remove trailing upper case letters from the name (useful for
3199 -- dealing with some cases of internal names).
3201 while Name_Len
> 1 and then Name_Buffer
(Name_Len
) in 'A' .. 'Z' loop
3202 Name_Len
:= Name_Len
- 1;
3205 -- If we have any of the names from standard that start with the
3206 -- characters "any " (e.g. Any_Type), then kill the message since
3207 -- almost certainly it is a junk cascaded message.
3210 and then Name_Buffer
(1 .. 4) = "any "
3212 Kill_Message
:= True;
3215 -- If we still have an internal name, kill the message (will only
3216 -- work if we already had errors!)
3218 if Is_Internal_Name
then
3219 Kill_Message
:= True;
3221 -- Remaining step is to adjust casing and possibly add 'Class
3223 Adjust_Name_Case
(Global_Name_Buffer
, Loc
);
3224 Set_Msg_Name_Buffer
;
3232 procedure Set_Msg_Text
(Text
: String; Flag
: Source_Ptr
) is
3233 C
: Character; -- Current character
3234 P
: Natural; -- Current index;
3236 procedure Skip_Msg_Insertion_Warning
(C
: Character);
3237 -- Deal with ? ?? ?x? ?X? ?*? ?$? insertion sequences (and the same
3238 -- sequences using < instead of ?). The caller has already bumped
3239 -- the pointer past the initial ? or < and C is set to this initial
3240 -- character (? or <). This procedure skips past the rest of the
3241 -- sequence. We do not need to set Msg_Insertion_Char, since this
3242 -- was already done during the message prescan.
3244 --------------------------------
3245 -- Skip_Msg_Insertion_Warning --
3246 --------------------------------
3248 procedure Skip_Msg_Insertion_Warning
(C
: Character) is
3250 if P
<= Text
'Last and then Text
(P
) = C
then
3253 elsif P
+ 1 <= Text
'Last
3254 and then (Text
(P
) in 'a' .. 'z'
3256 Text
(P
) in 'A' .. 'Z'
3261 and then Text
(P
+ 1) = C
3265 end Skip_Msg_Insertion_Warning
;
3267 -- Start of processing for Set_Msg_Text
3270 Manual_Quote_Mode
:= False;
3272 Flag_Source
:= Get_Source_File_Index
(Flag
);
3274 -- Skip info: at start, we have recorded this in Is_Info_Msg, and this
3275 -- will be used (Info field in error message object) to put back the
3276 -- string when it is printed. We need to do this, or we get confused
3277 -- with instantiation continuations.
3280 and then Text
(Text
'First .. Text
'First + 5) = "info: "
3282 P
:= Text
'First + 6;
3287 -- Loop through characters of message
3289 while P
<= Text
'Last loop
3293 -- Check for insertion character or sequence
3297 if P
<= Text
'Last and then Text
(P
) = '%' then
3299 Set_Msg_Insertion_Name_Literal
;
3301 Set_Msg_Insertion_Name
;
3305 if P
<= Text
'Last and then Text
(P
) = '$' then
3307 Set_Msg_Insertion_Unit_Name
(Suffix
=> False);
3309 Set_Msg_Insertion_Unit_Name
;
3313 Set_Msg_Insertion_File_Name
;
3316 Set_Msg_Insertion_Type_Reference
(Flag
);
3319 Set_Msg_Insertion_Reserved_Name
;
3322 Set_Msg_Insertion_Node
;
3325 Set_Msg_Insertion_Line_Number
(Error_Msg_Sloc
, Flag
);
3328 Continuation
:= True;
3330 if P
<= Text
'Last and then Text
(P
) = '\' then
3331 Continuation_New_Line
:= True;
3336 Set_Msg_Insertion_Column
;
3339 Set_Msg_Insertion_Run_Time_Name
;
3342 Set_Msg_Insertion_Uint
;
3345 Manual_Quote_Mode
:= not Manual_Quote_Mode
;
3349 null; -- already dealt with
3352 Skip_Msg_Insertion_Warning
('?');
3355 Skip_Msg_Insertion_Warning
('<');
3358 null; -- already dealt with
3361 Set_Msg_Char
(Text
(P
));
3365 Set_Msg_Str
(Error_Msg_String
(1 .. Error_Msg_Strlen
));
3367 -- Upper case letter
3371 -- Start of reserved word if two or more
3373 if P
<= Text
'Last and then Text
(P
) in 'A' .. 'Z' then
3375 Set_Msg_Insertion_Reserved_Word
(Text
, P
);
3377 -- Single upper case letter is just inserted
3383 -- '[' (will be/would have been raised at run time)
3387 -- Switch the message from a warning to an error if the flag
3388 -- -gnatwE is specified to treat run-time exception warnings
3392 and then Warning_Mode
= Treat_Run_Time_Warnings_As_Errors
3394 Is_Warning_Msg
:= False;
3397 if Is_Warning_Msg
then
3398 Set_Msg_Str
("will be raised at run time");
3400 Set_Msg_Str
("would have been raised at run time");
3403 -- ']' (may be/might have been raised at run time)
3406 if Is_Warning_Msg
then
3407 Set_Msg_Str
("may be raised at run time");
3409 Set_Msg_Str
("might have been raised at run time");
3412 -- Normal character with no special treatment
3424 procedure Set_Posted
(N
: Node_Id
) is
3428 if Is_Serious_Error
then
3430 -- We always set Error_Posted on the node itself
3432 Set_Error_Posted
(N
);
3434 -- If it is a subexpression, then set Error_Posted on parents up to
3435 -- and including the first non-subexpression construct. This helps
3436 -- avoid cascaded error messages within a single expression.
3442 Set_Error_Posted
(P
);
3443 exit when Nkind
(P
) not in N_Subexpr
;
3446 if Nkind
(P
) in N_Pragma_Argument_Association
3447 | N_Component_Association
3448 | N_Discriminant_Association
3449 | N_Generic_Association
3450 | N_Parameter_Association
3452 Set_Error_Posted
(Parent
(P
));
3455 -- A special check, if we just posted an error on an attribute
3456 -- definition clause, then also set the entity involved as posted.
3457 -- For example, this stops complaining about the alignment after
3458 -- complaining about the size, which is likely to be useless.
3460 if Nkind
(P
) = N_Attribute_Definition_Clause
then
3461 if Is_Entity_Name
(Name
(P
)) then
3462 Set_Error_Posted
(Entity
(Name
(P
)));
3468 -----------------------
3469 -- Set_Qualification --
3470 -----------------------
3472 procedure Set_Qualification
(N
: Nat
; E
: Entity_Id
) is
3474 if N
/= 0 and then Scope
(E
) /= Standard_Standard
then
3475 Set_Qualification
(N
- 1, Scope
(E
));
3476 Set_Msg_Node
(Scope
(E
));
3479 end Set_Qualification
;
3481 ------------------------
3482 -- Special_Msg_Delete --
3483 ------------------------
3485 -- Is it really right to have all this specialized knowledge in errout?
3487 function Special_Msg_Delete
3489 N
: Node_Or_Entity_Id
;
3490 E
: Node_Or_Entity_Id
) return Boolean
3493 -- Never delete messages in -gnatdO mode
3495 if Debug_Flag_OO
then
3498 -- Processing for "Size too small" messages
3500 elsif Is_Size_Too_Small_Message
(Msg
) then
3502 -- Suppress "size too small" errors in CodePeer mode, since code may
3503 -- be analyzed in a different configuration than the one used for
3504 -- compilation. Even when the configurations match, this message
3505 -- may be issued on correct code, because pragma Pack is ignored
3506 -- in CodePeer mode.
3508 if CodePeer_Mode
then
3511 -- When a size is wrong for a frozen type there is no explicit size
3512 -- clause, and other errors have occurred, suppress the message,
3513 -- since it is likely that this size error is a cascaded result of
3514 -- other errors. The reason we eliminate unfrozen types is that
3515 -- messages issued before the freeze type are for sure OK.
3518 and then Serious_Errors_Detected
> 0
3519 and then Nkind
(N
) /= N_Component_Clause
3520 and then Nkind
(Parent
(N
)) /= N_Component_Clause
3522 No
(Get_Attribute_Definition_Clause
(E
, Attribute_Size
))
3524 No
(Get_Attribute_Definition_Clause
(E
, Attribute_Object_Size
))
3526 No
(Get_Attribute_Definition_Clause
(E
, Attribute_Value_Size
))
3532 -- All special tests complete, so go ahead with message
3535 end Special_Msg_Delete
;
3541 procedure SPARK_Msg_N
(Msg
: String; N
: Node_Or_Entity_Id
) is
3543 if SPARK_Mode
/= Off
then
3544 Error_Msg_N
(Msg
, N
);
3552 procedure SPARK_Msg_NE
3554 N
: Node_Or_Entity_Id
;
3555 E
: Node_Or_Entity_Id
)
3558 if SPARK_Mode
/= Off
then
3559 Error_Msg_NE
(Msg
, N
, E
);
3563 --------------------------
3564 -- Unwind_Internal_Type --
3565 --------------------------
3567 procedure Unwind_Internal_Type
(Ent
: in out Entity_Id
) is
3568 Derived
: Boolean := False;
3570 Old_Ent
: Entity_Id
;
3573 -- Undo placement of a quote, since we will put it back later
3575 Mchar
:= Msg_Buffer
(Msglen
);
3578 Msglen
:= Msglen
- 1;
3581 -- The loop here deals with recursive types, we are trying to find a
3582 -- related entity that is not an implicit type. Note that the check with
3583 -- Old_Ent stops us from getting "stuck". Also, we don't output the
3584 -- "type derived from" message more than once in the case where we climb
3585 -- up multiple levels.
3590 -- Implicit access type, use directly designated type In Ada 2005,
3591 -- the designated type may be an anonymous access to subprogram, in
3592 -- which case we can only point to its definition.
3594 if Is_Access_Type
(Ent
) then
3595 if Ekind
(Ent
) = E_Access_Subprogram_Type
3596 or else Ekind
(Ent
) = E_Anonymous_Access_Subprogram_Type
3597 or else Is_Access_Protected_Subprogram_Type
(Ent
)
3599 Ent
:= Directly_Designated_Type
(Ent
);
3601 if not Comes_From_Source
(Ent
) then
3602 if Buffer_Ends_With
("type ") then
3603 Buffer_Remove
("type ");
3607 if Ekind
(Ent
) = E_Function
then
3608 Set_Msg_Str
("access to function ");
3609 elsif Ekind
(Ent
) = E_Procedure
then
3610 Set_Msg_Str
("access to procedure ");
3612 Set_Msg_Str
("access to subprogram");
3617 -- Type is access to object, named or anonymous
3620 Set_Msg_Str
("access to ");
3621 Ent
:= Directly_Designated_Type
(Ent
);
3626 elsif Is_Class_Wide_Type
(Ent
) then
3628 Ent
:= Root_Type
(Ent
);
3630 -- Use base type if this is a subtype
3632 elsif Ent
/= Base_Type
(Ent
) then
3633 Buffer_Remove
("type ");
3635 -- Avoid duplication "subtype of subtype of", and also replace
3636 -- "derived from subtype of" simply by "derived from"
3638 if not Buffer_Ends_With
("subtype of ")
3639 and then not Buffer_Ends_With
("derived from ")
3641 Set_Msg_Str
("subtype of ");
3644 Ent
:= Base_Type
(Ent
);
3646 -- If this is a base type with a first named subtype, use the first
3647 -- named subtype instead. This is not quite accurate in all cases,
3648 -- but it makes too much noise to be accurate and add 'Base in all
3649 -- cases. Note that we only do this is the first named subtype is not
3650 -- itself an internal name. This avoids the obvious loop (subtype ->
3651 -- basetype -> subtype) which would otherwise occur).
3655 FST
: constant Entity_Id
:= First_Subtype
(Ent
);
3658 if not Is_Internal_Name
(Chars
(FST
)) then
3662 -- Otherwise use root type
3666 Buffer_Remove
("type ");
3668 -- Test for "subtype of type derived from" which seems
3669 -- excessive and is replaced by "type derived from".
3671 Buffer_Remove
("subtype of");
3673 -- Avoid duplicated "type derived from type derived from"
3675 if not Buffer_Ends_With
("type derived from ") then
3676 Set_Msg_Str
("type derived from ");
3687 -- If we are stuck in a loop, get out and settle for the internal
3688 -- name after all. In this case we set to kill the message if it is
3689 -- not the first error message (we really try hard not to show the
3690 -- dirty laundry of the implementation to the poor user).
3692 if Ent
= Old_Ent
then
3693 Kill_Message
:= True;
3697 -- Get out if we finally found a non-internal name to use
3699 exit Find
when not Is_Internal_Name
(Chars
(Ent
));
3705 end Unwind_Internal_Type
;
3707 --------------------
3708 -- Warn_Insertion --
3709 --------------------
3711 function Warn_Insertion
return String is
3713 case Warning_Msg_Char
is
3717 when 'a' .. 'z' |
'A' .. 'Z' |
'*' |
'$' =>
3718 return '?' & Warning_Msg_Char
& '?';
3724 raise Program_Error
;