1 ------------------------------------------------------------------------------
3 -- GNAT COMPILER COMPONENTS --
9 -- Copyright (C) 1992-2019, 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;
318 Sindex : Source_File_Index;
319 -- Source index for flag location
321 Orig_Loc : Source_Ptr;
322 -- Original location of Flag_Location (i.e. location in original
323 -- template in instantiation case, otherwise unchanged).
326 -- Return if all errors are to be ignored
328 if Errors_Must_Be_Ignored then
332 -- If we already have messages, and we are trying to place a message at
333 -- No_Location, then just ignore the attempt since we assume that what
334 -- is happening is some cascaded junk. Note that this is safe in the
335 -- sense that proceeding will surely bomb. We will also bomb if the flag
336 -- location is No_Location and we don't have any messages so far, but
337 -- that is a real bug and a legitimate bomb, so we go ahead.
339 if Flag_Location = No_Location
340 and then Total_Errors_Detected > 0
345 -- Start of processing for new message
347 Sindex := Get_Source_File_Index (Flag_Location);
348 Prescan_Message (Msg);
349 Orig_Loc := Original_Location (Flag_Location);
351 -- If the current location is in an instantiation, the issue arises of
352 -- whether to post the message on the template or the instantiation.
354 -- The way we decide is to see if we have posted the same message on
355 -- the template when we compiled the template (the template is always
356 -- compiled before any instantiations). For this purpose, we use a
357 -- separate table of messages. The reason we do this is twofold:
359 -- First, the messages can get changed by various processing
360 -- including the insertion of tokens etc, making it hard to
361 -- do the comparison.
363 -- Second, we will suppress a warning on a template if it is not in
364 -- the current extended source unit. That's reasonable and means we
365 -- don't want the warning on the instantiation here either, but it
366 -- does mean that the main error table would not in any case include
369 if Flag_Location = Orig_Loc then
370 Non_Instance_Msgs.Append ((new String'(Msg
), Flag_Location
));
371 Warn_On_Instance
:= False;
373 -- Here we have an instance message
376 -- Delete if debug flag off, and this message duplicates a message
377 -- already posted on the corresponding template
379 if not Debug_Flag_GG
then
380 for J
in Non_Instance_Msgs
.First
.. Non_Instance_Msgs
.Last
loop
381 if Msg
= Non_Instance_Msgs
.Table
(J
).Msg
.all
382 and then Non_Instance_Msgs
.Table
(J
).Loc
= Orig_Loc
389 -- No duplicate, so error/warning will be posted on instance
391 Warn_On_Instance
:= Is_Warning_Msg
;
394 -- Ignore warning message that is suppressed for this location. Note
395 -- that style checks are not considered warning messages for this
398 if Is_Warning_Msg
and then Warnings_Suppressed
(Orig_Loc
) /= No_String
402 -- For style messages, check too many messages so far
405 and then Maximum_Messages
/= 0
406 and then Warnings_Detected
>= Maximum_Messages
411 -- The idea at this stage is that we have two kinds of messages
413 -- First, we have those messages that are to be placed as requested at
414 -- Flag_Location. This includes messages that have nothing to do with
415 -- generics, and also messages placed on generic templates that reflect
416 -- an error in the template itself. For such messages we simply call
417 -- Error_Msg_Internal to place the message in the requested location.
419 if Instantiation
(Sindex
) = No_Location
then
420 Error_Msg_Internal
(Msg
, Flag_Location
, Flag_Location
, False, N
);
424 -- If we are trying to flag an error in an instantiation, we may have
425 -- a generic contract violation. What we generate in this case is:
427 -- instantiation error at ...
428 -- original error message
432 -- warning: in instantiation at ...
433 -- warning: original warning message
437 -- info: in instantiation at ...
438 -- info: original info message
440 -- All these messages are posted at the location of the top level
441 -- instantiation. If there are nested instantiations, then the
442 -- instantiation error message can be repeated, pointing to each
443 -- of the relevant instantiations.
445 -- Note: the instantiation mechanism is also shared for inlining of
446 -- subprogram bodies when front end inlining is done. In this case the
447 -- messages have the form:
449 -- in inlined body at ...
450 -- original error message
454 -- warning: in inlined body at ...
455 -- warning: original warning message
459 -- info: in inlined body at ...
460 -- info: original info message
462 -- OK, here we have an instantiation error, and we need to generate the
463 -- error on the instantiation, rather than on the template.
466 Actual_Error_Loc
: Source_Ptr
;
467 -- Location of outer level instantiation in instantiation case, or
468 -- just a copy of Flag_Location in the normal case. This is the
469 -- location where all error messages will actually be posted.
471 Save_Error_Msg_Sloc
: constant Source_Ptr
:= Error_Msg_Sloc
;
472 -- Save possible location set for caller's message. We need to use
473 -- Error_Msg_Sloc for the location of the instantiation error but we
474 -- have to preserve a possible original value.
476 X
: Source_File_Index
;
478 Msg_Cont_Status
: Boolean;
479 -- Used to label continuation lines in instantiation case with
480 -- proper Msg_Cont status.
483 -- Loop to find highest level instantiation, where all error
484 -- messages will be placed.
488 Actual_Error_Loc
:= Instantiation
(X
);
489 X
:= Get_Source_File_Index
(Actual_Error_Loc
);
490 exit when Instantiation
(X
) = No_Location
;
493 -- Since we are generating the messages at the instantiation point in
494 -- any case, we do not want the references to the bad lines in the
495 -- instance to be annotated with the location of the instantiation.
497 Suppress_Instance_Location
:= True;
498 Msg_Cont_Status
:= False;
500 -- Loop to generate instantiation messages
502 Error_Msg_Sloc
:= Flag_Location
;
503 X
:= Get_Source_File_Index
(Flag_Location
);
504 while Instantiation
(X
) /= No_Location
loop
506 -- Suppress instantiation message on continuation lines
508 if Msg
(Msg
'First) /= '\' then
510 -- Case of inlined body
512 if Inlined_Body
(X
) then
515 (Msg
=> "info: in inlined body #",
516 Sptr
=> Actual_Error_Loc
,
517 Optr
=> Flag_Location
,
518 Msg_Cont
=> Msg_Cont_Status
,
521 elsif Is_Warning_Msg
then
523 (Msg
=> Warn_Insertion
& "in inlined body #",
524 Sptr
=> Actual_Error_Loc
,
525 Optr
=> Flag_Location
,
526 Msg_Cont
=> Msg_Cont_Status
,
529 elsif Is_Style_Msg
then
531 (Msg
=> "style: in inlined body #",
532 Sptr
=> Actual_Error_Loc
,
533 Optr
=> Flag_Location
,
534 Msg_Cont
=> Msg_Cont_Status
,
539 (Msg
=> "error in inlined body #",
540 Sptr
=> Actual_Error_Loc
,
541 Optr
=> Flag_Location
,
542 Msg_Cont
=> Msg_Cont_Status
,
546 -- Case of generic instantiation
551 (Msg
=> "info: in instantiation #",
552 Sptr
=> Actual_Error_Loc
,
553 Optr
=> Flag_Location
,
554 Msg_Cont
=> Msg_Cont_Status
,
557 elsif Is_Warning_Msg
then
559 (Msg
=> Warn_Insertion
& "in instantiation #",
560 Sptr
=> Actual_Error_Loc
,
561 Optr
=> Flag_Location
,
562 Msg_Cont
=> Msg_Cont_Status
,
565 elsif Is_Style_Msg
then
567 (Msg
=> "style: in instantiation #",
568 Sptr
=> Actual_Error_Loc
,
569 Optr
=> Flag_Location
,
570 Msg_Cont
=> Msg_Cont_Status
,
575 (Msg
=> "instantiation error #",
576 Sptr
=> Actual_Error_Loc
,
577 Optr
=> Flag_Location
,
578 Msg_Cont
=> Msg_Cont_Status
,
584 Error_Msg_Sloc
:= Instantiation
(X
);
585 X
:= Get_Source_File_Index
(Error_Msg_Sloc
);
586 Msg_Cont_Status
:= True;
589 Suppress_Instance_Location
:= False;
590 Error_Msg_Sloc
:= Save_Error_Msg_Sloc
;
592 -- Here we output the original message on the outer instantiation
596 Sptr
=> Actual_Error_Loc
,
597 Optr
=> Flag_Location
,
598 Msg_Cont
=> Msg_Cont_Status
,
603 --------------------------------
604 -- Error_Msg_Ada_2012_Feature --
605 --------------------------------
607 procedure Error_Msg_Ada_2012_Feature
(Feature
: String; Loc
: Source_Ptr
) is
609 if Ada_Version
< Ada_2012
then
610 Error_Msg
(Feature
& " is an Ada 2012 feature", Loc
);
612 if No
(Ada_Version_Pragma
) then
613 Error_Msg
("\unit must be compiled with -gnat2012 switch", Loc
);
615 Error_Msg_Sloc
:= Sloc
(Ada_Version_Pragma
);
616 Error_Msg
("\incompatible with Ada version set#", Loc
);
619 end Error_Msg_Ada_2012_Feature
;
625 procedure Error_Msg_AP
(Msg
: String) is
630 -- If we had saved the Scan_Ptr value after scanning the previous
631 -- token, then we would have exactly the right place for putting
632 -- the flag immediately at hand. However, that would add at least
633 -- two instructions to a Scan call *just* to service the possibility
634 -- of an Error_Msg_AP call. So instead we reconstruct that value.
636 -- We have two possibilities, start with Prev_Token_Ptr and skip over
637 -- the current token, which is made harder by the possibility that this
638 -- token may be in error, or start with Token_Ptr and work backwards.
639 -- We used to take the second approach, but it's hard because of
640 -- comments, and harder still because things that look like comments
641 -- can appear inside strings. So now we take the first approach.
643 -- Note: in the case where there is no previous token, Prev_Token_Ptr
644 -- is set to Source_First, which is a reasonable position for the
645 -- error flag in this situation.
647 S1
:= Prev_Token_Ptr
;
650 -- If the previous token is a string literal, we need a special approach
651 -- since there may be white space inside the literal and we don't want
652 -- to stop on that white space.
654 -- Note: since this is an error recovery issue anyway, it is not worth
655 -- worrying about special UTF_32 line terminator characters here.
657 if Prev_Token
= Tok_String_Literal
then
661 if Source
(S1
) = C
then
663 exit when Source
(S1
) /= C
;
664 elsif Source
(S1
) in Line_Terminator
then
669 -- Character literal also needs special handling
671 elsif Prev_Token
= Tok_Char_Literal
then
674 -- Otherwise we search forward for the end of the current token, marked
675 -- by a line terminator, white space, a comment symbol or if we bump
676 -- into the following token (i.e. the current token).
678 -- Again, it is not worth worrying about UTF_32 special line terminator
679 -- characters in this context, since this is only for error recovery.
682 while Source
(S1
) not in Line_Terminator
683 and then Source
(S1
) /= ' '
684 and then Source
(S1
) /= ASCII
.HT
685 and then (Source
(S1
) /= '-' or else Source
(S1
+ 1) /= '-')
686 and then S1
/= Token_Ptr
692 -- S1 is now set to the location for the flag
701 procedure Error_Msg_BC
(Msg
: String) is
703 -- If we are at end of file, post the flag after the previous token
705 if Token
= Tok_EOF
then
708 -- If we are at start of file, post the flag at the current token
710 elsif Token_Ptr
= Source_First
(Current_Source_File
) then
713 -- If the character before the current token is a space or a horizontal
714 -- tab, then we place the flag on this character (in the case of a tab
715 -- we would really like to place it in the "last" character of the tab
716 -- space, but that it too much trouble to worry about).
718 elsif Source
(Token_Ptr
- 1) = ' '
719 or else Source
(Token_Ptr
- 1) = ASCII
.HT
721 Error_Msg
(Msg
, Token_Ptr
- 1);
723 -- If there is no space or tab before the current token, then there is
724 -- no room to place the flag before the token, so we place it on the
725 -- token instead (this happens for example at the start of a line).
728 Error_Msg
(Msg
, Token_Ptr
);
736 procedure Error_Msg_CRT
(Feature
: String; N
: Node_Id
) is
737 CNRT
: constant String := " not allowed in no run time mode";
738 CCRT
: constant String := " not supported by configuration>";
740 S
: String (1 .. Feature
'Length + 1 + CCRT
'Length);
745 S
(2 .. Feature
'Length + 1) := Feature
;
746 L
:= Feature
'Length + 2;
748 if No_Run_Time_Mode
then
749 S
(L
.. L
+ CNRT
'Length - 1) := CNRT
;
750 L
:= L
+ CNRT
'Length - 1;
752 else pragma Assert
(Configurable_Run_Time_Mode
);
753 S
(L
.. L
+ CCRT
'Length - 1) := CCRT
;
754 L
:= L
+ CCRT
'Length - 1;
757 Error_Msg_N
(S
(1 .. L
), N
);
758 Configurable_Run_Time_Violations
:= Configurable_Run_Time_Violations
+ 1;
765 procedure Error_Msg_PT
(E
: Entity_Id
; Iface_Prim
: Entity_Id
) is
768 ("illegal overriding of subprogram inherited from interface", E
);
770 Error_Msg_Sloc
:= Sloc
(Iface_Prim
);
772 if Ekind
(E
) = E_Function
then
774 ("\first formal of & declared # must be of mode `IN` "
775 & "or access-to-constant", E
);
778 ("\first formal of & declared # must be of mode `OUT`, `IN OUT` "
779 & "or access-to-variable", E
);
787 procedure Error_Msg_F
(Msg
: String; N
: Node_Id
) is
789 Error_Msg_NEL
(Msg
, N
, N
, Sloc
(First_Node
(N
)));
796 procedure Error_Msg_FE
799 E
: Node_Or_Entity_Id
)
802 Error_Msg_NEL
(Msg
, N
, E
, Sloc
(First_Node
(N
)));
805 ------------------------
806 -- Error_Msg_Internal --
807 ------------------------
809 procedure Error_Msg_Internal
816 Next_Msg
: Error_Msg_Id
;
817 -- Pointer to next message at insertion point
819 Prev_Msg
: Error_Msg_Id
;
820 -- Pointer to previous message at insertion point
822 Temp_Msg
: Error_Msg_Id
;
825 -- Set if warning to be treated as error
827 procedure Handle_Serious_Error
;
828 -- Internal procedure to do all error message handling for a serious
829 -- error message, other than bumping the error counts and arranging
830 -- for the message to be output.
832 --------------------------
833 -- Handle_Serious_Error --
834 --------------------------
836 procedure Handle_Serious_Error
is
838 -- Turn off code generation if not done already
840 if Operating_Mode
= Generate_Code
then
841 Operating_Mode
:= Check_Semantics
;
842 Expander_Active
:= False;
845 -- Set the fatal error flag in the unit table unless we are in
846 -- Try_Semantics mode (in which case we set ignored mode if not
847 -- currently set. This stops the semantics from being performed
848 -- if we find a serious error. This is skipped if we are currently
849 -- dealing with the configuration pragma file.
851 if Current_Source_Unit
/= No_Unit
then
853 U
: constant Unit_Number_Type
:= Get_Source_Unit
(Sptr
);
855 if Try_Semantics
then
856 if Fatal_Error
(U
) = None
then
857 Set_Fatal_Error
(U
, Error_Ignored
);
860 Set_Fatal_Error
(U
, Error_Detected
);
865 -- Disable warnings on unused use clauses and the like. Otherwise, an
866 -- error might hide a reference to an entity in a used package, so
867 -- after fixing the error, the use clause no longer looks like it was
870 Check_Unreferenced
:= False;
871 Check_Unreferenced_Formals
:= False;
872 end Handle_Serious_Error
;
874 -- Start of processing for Error_Msg_Internal
877 if Raise_Exception_On_Error
/= 0 then
878 raise Error_Msg_Exception
;
881 Continuation
:= Msg_Cont
;
882 Continuation_New_Line
:= False;
883 Suppress_Message
:= False;
884 Kill_Message
:= False;
885 Set_Msg_Text
(Msg
, Sptr
);
887 -- Kill continuation if parent message killed
889 if Continuation
and Last_Killed
then
893 -- Return without doing anything if message is suppressed
896 and then not All_Errors_Mode
897 and then not Is_Warning_Msg
898 and then not Is_Unconditional_Msg
900 if not Continuation
then
907 -- Return without doing anything if message is killed and this is not
908 -- the first error message. The philosophy is that if we get a weird
909 -- error message and we already have had a message, then we hope the
910 -- weird message is a junk cascaded message
913 and then not All_Errors_Mode
914 and then Total_Errors_Detected
/= 0
916 if not Continuation
then
923 -- Special check for warning message to see if it should be output
925 if Is_Warning_Msg
then
927 -- Immediate return if warning message and warnings are suppressed
929 if Warnings_Suppressed
(Optr
) /= No_String
931 Warnings_Suppressed
(Sptr
) /= No_String
933 Cur_Msg
:= No_Error_Msg
;
937 -- If the flag location is in the main extended source unit then for
938 -- sure we want the warning since it definitely belongs
940 if In_Extended_Main_Source_Unit
(Sptr
) then
943 -- If the main unit has not been read yet. the warning must be on
944 -- a configuration file: gnat.adc or user-defined. This means we
945 -- are not parsing the main unit yet, so skip following checks.
947 elsif No
(Cunit
(Main_Unit
)) then
950 -- If the flag location is not in the main extended source unit, then
951 -- we want to eliminate the warning, unless it is in the extended
952 -- main code unit and we want warnings on the instance.
954 elsif In_Extended_Main_Code_Unit
(Sptr
) and then Warn_On_Instance
then
957 -- Keep warning if debug flag G set
959 elsif Debug_Flag_GG
then
962 -- Keep warning if message text contains !!
964 elsif Has_Double_Exclam
then
967 -- Here is where we delete a warning from a with'ed unit
970 Cur_Msg
:= No_Error_Msg
;
972 if not Continuation
then
980 -- If message is to be ignored in special ignore message mode, this is
981 -- where we do this special processing, bypassing message output.
983 if Ignore_Errors_Enable
> 0 then
984 if Is_Serious_Error
then
985 Handle_Serious_Error
;
991 -- If error message line length set, and this is a continuation message
992 -- then all we do is to append the text to the text of the last message
993 -- with a comma space separator (eliminating a possible (style) or
996 if Error_Msg_Line_Length
/= 0 and then Continuation
then
997 Cur_Msg
:= Errors
.Last
;
1000 Oldm
: String_Ptr
:= Errors
.Table
(Cur_Msg
).Text
;
1001 Newm
: String (1 .. Oldm
'Last + 2 + Msglen
);
1006 -- First copy old message to new one and free it
1008 Newm
(Oldm
'Range) := Oldm
.all;
1009 Newl
:= Oldm
'Length;
1012 -- Remove (style) or info: at start of message
1014 if Msglen
> 8 and then Msg_Buffer
(1 .. 8) = "(style) " then
1017 elsif Msglen
> 6 and then Msg_Buffer
(1 .. 6) = "info: " then
1024 -- Now deal with separation between messages. Normally this is
1025 -- simply comma space, but there are some special cases.
1027 -- If continuation new line, then put actual NL character in msg
1029 if Continuation_New_Line
then
1031 Newm
(Newl
) := ASCII
.LF
;
1033 -- If continuation message is enclosed in parentheses, then
1034 -- special treatment (don't need a comma, and we want to combine
1035 -- successive parenthetical remarks into a single one with
1036 -- separating commas).
1038 elsif Msg_Buffer
(M
) = '(' and then Msg_Buffer
(Msglen
) = ')' then
1040 -- Case where existing message ends in right paren, remove
1041 -- and separate parenthetical remarks with a comma.
1043 if Newm
(Newl
) = ')' then
1045 Msg_Buffer
(M
) := ' ';
1047 -- Case where we are adding new parenthetical comment
1054 -- Case where continuation not in parens and no new line
1057 Newm
(Newl
+ 1 .. Newl
+ 2) := ", ";
1061 -- Append new message
1063 Newm
(Newl
+ 1 .. Newl
+ Msglen
- M
+ 1) :=
1064 Msg_Buffer
(M
.. Msglen
);
1065 Newl
:= Newl
+ Msglen
- M
+ 1;
1066 Errors
.Table
(Cur_Msg
).Text
:= new String'(Newm (1 .. Newl));
1068 -- Update warning msg flag and message doc char if needed
1070 if Is_Warning_Msg then
1071 if not Errors.Table (Cur_Msg).Warn then
1072 Errors.Table (Cur_Msg).Warn := True;
1073 Errors.Table (Cur_Msg).Warn_Chr := Warning_Msg_Char;
1075 elsif Warning_Msg_Char /= ' ' then
1076 Errors.Table (Cur_Msg).Warn_Chr := Warning_Msg_Char;
1084 -- Here we build a new error object
1087 ((Text => new String'(Msg_Buffer
(1 .. Msglen
)),
1088 Next
=> No_Error_Msg
,
1089 Prev
=> No_Error_Msg
,
1092 Sfile
=> Get_Source_File_Index
(Sptr
),
1093 Line
=> Get_Physical_Line_Number
(Sptr
),
1094 Col
=> Get_Column_Number
(Sptr
),
1095 Warn
=> Is_Warning_Msg
,
1096 Info
=> Is_Info_Msg
,
1097 Check
=> Is_Check_Msg
,
1098 Warn_Err
=> False, -- reset below
1099 Warn_Chr
=> Warning_Msg_Char
,
1100 Style
=> Is_Style_Msg
,
1101 Serious
=> Is_Serious_Error
,
1102 Uncond
=> Is_Unconditional_Msg
,
1103 Msg_Cont
=> Continuation
,
1106 Cur_Msg
:= Errors
.Last
;
1108 -- Test if warning to be treated as error
1111 (Is_Warning_Msg
or Is_Style_Msg
)
1112 and then (Warning_Treated_As_Error
(Msg_Buffer
(1 .. Msglen
))
1114 Warning_Treated_As_Error
(Get_Warning_Tag
(Cur_Msg
)));
1116 -- Propagate Warn_Err to this message and preceding continuations
1118 for J
in reverse 1 .. Errors
.Last
loop
1119 Errors
.Table
(J
).Warn_Err
:= Warn_Err
;
1120 exit when not Errors
.Table
(J
).Msg_Cont
;
1123 -- If immediate errors mode set, output error message now. Also output
1124 -- now if the -d1 debug flag is set (so node number message comes out
1125 -- just before actual error message)
1127 if Debug_Flag_OO
or else Debug_Flag_1
then
1130 (Errors
.Table
(Cur_Msg
).Line
, Errors
.Table
(Cur_Msg
).Sfile
, True);
1131 Temp_Msg
:= Cur_Msg
;
1132 Output_Error_Msgs
(Temp_Msg
);
1134 -- If not in immediate errors mode, then we insert the message in the
1135 -- error chain for later output by Finalize. The messages are sorted
1136 -- first by unit (main unit comes first), and within a unit by source
1137 -- location (earlier flag location first in the chain).
1140 -- First a quick check, does this belong at the very end of the chain
1141 -- of error messages. This saves a lot of time in the normal case if
1142 -- there are lots of messages.
1144 if Last_Error_Msg
/= No_Error_Msg
1145 and then Errors
.Table
(Cur_Msg
).Sfile
=
1146 Errors
.Table
(Last_Error_Msg
).Sfile
1147 and then (Sptr
> Errors
.Table
(Last_Error_Msg
).Sptr
1149 (Sptr
= Errors
.Table
(Last_Error_Msg
).Sptr
1151 Optr
> Errors
.Table
(Last_Error_Msg
).Optr
))
1153 Prev_Msg
:= Last_Error_Msg
;
1154 Next_Msg
:= No_Error_Msg
;
1156 -- Otherwise do a full sequential search for the insertion point
1159 Prev_Msg
:= No_Error_Msg
;
1160 Next_Msg
:= First_Error_Msg
;
1161 while Next_Msg
/= No_Error_Msg
loop
1163 Errors
.Table
(Cur_Msg
).Sfile
< Errors
.Table
(Next_Msg
).Sfile
;
1165 if Errors
.Table
(Cur_Msg
).Sfile
= Errors
.Table
(Next_Msg
).Sfile
1167 exit when Sptr
< Errors
.Table
(Next_Msg
).Sptr
1168 or else (Sptr
= Errors
.Table
(Next_Msg
).Sptr
1169 and then Optr
< Errors
.Table
(Next_Msg
).Optr
);
1172 Prev_Msg
:= Next_Msg
;
1173 Next_Msg
:= Errors
.Table
(Next_Msg
).Next
;
1177 -- Now we insert the new message in the error chain.
1179 -- The possible insertion point for the new message is after Prev_Msg
1180 -- and before Next_Msg. However, this is where we do a special check
1181 -- for redundant parsing messages, defined as messages posted on the
1182 -- same line. The idea here is that probably such messages are junk
1183 -- from the parser recovering. In full errors mode, we don't do this
1184 -- deletion, but otherwise such messages are discarded at this stage.
1186 if Prev_Msg
/= No_Error_Msg
1187 and then Errors
.Table
(Prev_Msg
).Line
=
1188 Errors
.Table
(Cur_Msg
).Line
1189 and then Errors
.Table
(Prev_Msg
).Sfile
=
1190 Errors
.Table
(Cur_Msg
).Sfile
1191 and then Compiler_State
= Parsing
1192 and then not All_Errors_Mode
1194 -- Don't delete unconditional messages and at this stage, don't
1195 -- delete continuation lines; we attempted to delete those earlier
1196 -- if the parent message was deleted.
1198 if not Errors
.Table
(Cur_Msg
).Uncond
1199 and then not Continuation
1201 -- Don't delete if prev msg is warning and new msg is an error.
1202 -- This is because we don't want a real error masked by a
1203 -- warning. In all other cases (that is parse errors for the
1204 -- same line that are not unconditional) we do delete the
1205 -- message. This helps to avoid junk extra messages from
1206 -- cascaded parsing errors
1208 if not (Errors
.Table
(Prev_Msg
).Warn
1210 Errors
.Table
(Prev_Msg
).Style
)
1212 (Errors
.Table
(Cur_Msg
).Warn
1214 Errors
.Table
(Cur_Msg
).Style
)
1216 -- All tests passed, delete the message by simply returning
1217 -- without any further processing.
1219 pragma Assert
(not Continuation
);
1221 Last_Killed
:= True;
1227 -- Come here if message is to be inserted in the error chain
1229 if not Continuation
then
1230 Last_Killed
:= False;
1233 if Prev_Msg
= No_Error_Msg
then
1234 First_Error_Msg
:= Cur_Msg
;
1236 Errors
.Table
(Prev_Msg
).Next
:= Cur_Msg
;
1239 Errors
.Table
(Cur_Msg
).Next
:= Next_Msg
;
1241 if Next_Msg
= No_Error_Msg
then
1242 Last_Error_Msg
:= Cur_Msg
;
1246 -- Bump appropriate statistics counts
1248 if Errors
.Table
(Cur_Msg
).Info
then
1250 -- Could be (usually is) both "info" and "warning"
1252 if Errors
.Table
(Cur_Msg
).Warn
then
1253 Warning_Info_Messages
:= Warning_Info_Messages
+ 1;
1254 Warnings_Detected
:= Warnings_Detected
+ 1;
1256 Report_Info_Messages
:= Report_Info_Messages
+ 1;
1259 elsif Errors
.Table
(Cur_Msg
).Warn
1260 or else Errors
.Table
(Cur_Msg
).Style
1262 Warnings_Detected
:= Warnings_Detected
+ 1;
1264 elsif Errors
.Table
(Cur_Msg
).Check
then
1265 Check_Messages
:= Check_Messages
+ 1;
1268 Total_Errors_Detected
:= Total_Errors_Detected
+ 1;
1270 if Errors
.Table
(Cur_Msg
).Serious
then
1271 Serious_Errors_Detected
:= Serious_Errors_Detected
+ 1;
1272 Handle_Serious_Error
;
1274 -- If not serious error, set Fatal_Error to indicate ignored error
1278 U
: constant Unit_Number_Type
:= Get_Source_Unit
(Sptr
);
1280 if Fatal_Error
(U
) = None
then
1281 Set_Fatal_Error
(U
, Error_Ignored
);
1287 -- Record warning message issued
1289 if Errors
.Table
(Cur_Msg
).Warn
1290 and then not Errors
.Table
(Cur_Msg
).Msg_Cont
1292 Warning_Msg
:= Cur_Msg
;
1295 -- If too many warnings turn off warnings
1297 if Maximum_Messages
/= 0 then
1298 if Warnings_Detected
= Maximum_Messages
then
1299 Warning_Mode
:= Suppress
;
1302 -- If too many errors abandon compilation
1304 if Total_Errors_Detected
= Maximum_Messages
then
1305 raise Unrecoverable_Error
;
1308 end Error_Msg_Internal
;
1314 procedure Error_Msg_N
(Msg
: String; N
: Node_Or_Entity_Id
) is
1316 Error_Msg_NEL
(Msg
, N
, N
, Sloc
(N
));
1323 procedure Error_Msg_NE
1325 N
: Node_Or_Entity_Id
;
1326 E
: Node_Or_Entity_Id
)
1329 Error_Msg_NEL
(Msg
, N
, E
, Sloc
(N
));
1336 procedure Error_Msg_NEL
1338 N
: Node_Or_Entity_Id
;
1339 E
: Node_Or_Entity_Id
;
1340 Flag_Location
: Source_Ptr
)
1343 if Special_Msg_Delete
(Msg
, N
, E
) then
1347 Prescan_Message
(Msg
);
1349 -- Special handling for warning messages
1351 if Is_Warning_Msg
then
1353 -- Suppress if no warnings set for either entity or node
1355 if No_Warnings
(N
) or else No_Warnings
(E
) then
1357 -- Disable any continuation messages as well
1359 Last_Killed
:= True;
1363 -- Suppress if inside loop that is known to be null or is probably
1364 -- null (case where loop executes only if invalid values present).
1365 -- In either case warnings in the loop are likely to be junk.
1372 while Present
(P
) loop
1373 if Nkind
(P
) = N_Loop_Statement
1374 and then Suppress_Loop_Warnings
(P
)
1384 -- Test for message to be output
1387 or else Is_Unconditional_Msg
1388 or else Is_Warning_Msg
1390 or else (Msg
(Msg
'First) = '\' and then not Last_Killed
)
1393 Error_Msg_Node_1
:= E
;
1394 Error_Msg
(Msg
, Flag_Location
, N
);
1397 Last_Killed
:= True;
1407 procedure Error_Msg_NW
1410 N
: Node_Or_Entity_Id
)
1414 and then In_Extended_Main_Source_Unit
(N
)
1415 and then Comes_From_Source
(N
)
1417 Error_Msg_NEL
(Msg
, N
, N
, Sloc
(N
));
1425 procedure Error_Msg_S
(Msg
: String) is
1427 Error_Msg
(Msg
, Scan_Ptr
);
1434 procedure Error_Msg_SC
(Msg
: String) is
1436 -- If we are at end of file, post the flag after the previous token
1438 if Token
= Tok_EOF
then
1441 -- For all other cases the message is posted at the current token
1445 Error_Msg
(Msg
, Token_Ptr
);
1453 procedure Error_Msg_SP
(Msg
: String) is
1455 -- Note: in the case where there is no previous token, Prev_Token_Ptr
1456 -- is set to Source_First, which is a reasonable position for the
1457 -- error flag in this situation
1459 Error_Msg
(Msg
, Prev_Token_Ptr
);
1466 procedure Finalize
(Last_Call
: Boolean) is
1471 procedure Delete_Warning
(E
: Error_Msg_Id
);
1472 -- Delete a warning msg if not already deleted and adjust warning count
1474 --------------------
1475 -- Delete_Warning --
1476 --------------------
1478 procedure Delete_Warning
(E
: Error_Msg_Id
) is
1480 if not Errors
.Table
(E
).Deleted
then
1481 Errors
.Table
(E
).Deleted
:= True;
1482 Warnings_Detected
:= Warnings_Detected
- 1;
1484 if Errors
.Table
(E
).Info
then
1485 Warning_Info_Messages
:= Warning_Info_Messages
- 1;
1490 -- Start of processing for Finalize
1493 -- Set Prev pointers
1495 Cur
:= First_Error_Msg
;
1496 while Cur
/= No_Error_Msg
loop
1497 Nxt
:= Errors
.Table
(Cur
).Next
;
1498 exit when Nxt
= No_Error_Msg
;
1499 Errors
.Table
(Nxt
).Prev
:= Cur
;
1503 -- Eliminate any duplicated error messages from the list. This is
1504 -- done after the fact to avoid problems with Change_Error_Text.
1506 Cur
:= First_Error_Msg
;
1507 while Cur
/= No_Error_Msg
loop
1508 Nxt
:= Errors
.Table
(Cur
).Next
;
1511 while F
/= No_Error_Msg
1512 and then Errors
.Table
(F
).Sptr
= Errors
.Table
(Cur
).Sptr
1514 Check_Duplicate_Message
(Cur
, F
);
1515 F
:= Errors
.Table
(F
).Next
;
1521 -- Mark any messages suppressed by specific warnings as Deleted
1523 Cur
:= First_Error_Msg
;
1524 while Cur
/= No_Error_Msg
loop
1526 CE
: Error_Msg_Object
renames Errors
.Table
(Cur
);
1527 Tag
: constant String := Get_Warning_Tag
(Cur
);
1530 if (CE
.Warn
and not CE
.Deleted
)
1532 (Warning_Specifically_Suppressed
(CE
.Sptr
, CE
.Text
, Tag
) /=
1535 Warning_Specifically_Suppressed
(CE
.Optr
, CE
.Text
, Tag
) /=
1538 Delete_Warning
(Cur
);
1540 -- If this is a continuation, delete previous parts of message
1543 while Errors
.Table
(F
).Msg_Cont
loop
1544 F
:= Errors
.Table
(F
).Prev
;
1545 exit when F
= No_Error_Msg
;
1549 -- Delete any following continuations
1553 F
:= Errors
.Table
(F
).Next
;
1554 exit when F
= No_Error_Msg
;
1555 exit when not Errors
.Table
(F
).Msg_Cont
;
1561 Cur
:= Errors
.Table
(Cur
).Next
;
1564 Finalize_Called
:= True;
1566 -- Check consistency of specific warnings (may add warnings). We only
1567 -- do this on the last call, after all possible warnings are posted.
1570 Validate_Specific_Warnings
(Error_Msg
'Access);
1578 function First_Node
(C
: Node_Id
) return Node_Id
is
1579 Orig
: constant Node_Id
:= Original_Node
(C
);
1580 Loc
: constant Source_Ptr
:= Sloc
(Orig
);
1581 Sfile
: constant Source_File_Index
:= Get_Source_File_Index
(Loc
);
1585 function Test_Earlier
(N
: Node_Id
) return Traverse_Result
;
1586 -- Function applied to every node in the construct
1588 procedure Search_Tree_First
is new Traverse_Proc
(Test_Earlier
);
1589 -- Create traversal procedure
1595 function Test_Earlier
(N
: Node_Id
) return Traverse_Result
is
1596 Norig
: constant Node_Id
:= Original_Node
(N
);
1597 Loc
: constant Source_Ptr
:= Sloc
(Norig
);
1600 -- Check for earlier
1604 -- Ignore nodes with no useful location information
1606 and then Loc
/= Standard_Location
1607 and then Loc
/= No_Location
1609 -- Ignore nodes from a different file. This ensures against cases
1610 -- of strange foreign code somehow being present. We don't want
1611 -- wild placement of messages if that happens.
1613 and then Get_Source_File_Index
(Loc
) = Sfile
1622 -- Start of processing for First_Node
1625 if Nkind
(Orig
) in N_Subexpr
then
1628 Search_Tree_First
(Orig
);
1640 function First_Sloc
(N
: Node_Id
) return Source_Ptr
is
1641 SI
: constant Source_File_Index
:= Source_Index
(Get_Source_Unit
(N
));
1642 SF
: constant Source_Ptr
:= Source_First
(SI
);
1647 F
:= First_Node
(N
);
1650 -- The following circuit is a bit subtle. When we have parenthesized
1651 -- expressions, then the Sloc will not record the location of the paren,
1652 -- but we would like to post the flag on the paren. So what we do is to
1653 -- crawl up the tree from the First_Node, adjusting the Sloc value for
1654 -- any parentheses we know are present. Yes, we know this circuit is not
1655 -- 100% reliable (e.g. because we don't record all possible paren level
1656 -- values), but this is only for an error message so it is good enough.
1659 Paren_Loop
: for J
in 1 .. Paren_Count
(F
) loop
1661 -- We don't look more than 12 characters behind the current
1662 -- location, and in any case not past the front of the source.
1664 Search_Loop
: for K
in 1 .. 12 loop
1665 exit Search_Loop
when S
= SF
;
1667 if Source_Text
(SI
) (S
- 1) = '(' then
1671 elsif Source_Text
(SI
) (S
- 1) <= ' ' then
1677 end loop Search_Loop
;
1678 end loop Paren_Loop
;
1680 exit Node_Loop
when F
= N
;
1682 exit Node_Loop
when Nkind
(F
) not in N_Subexpr
;
1688 -----------------------
1689 -- Get_Ignore_Errors --
1690 -----------------------
1692 function Get_Ignore_Errors
return Boolean is
1694 return Errors_Must_Be_Ignored
;
1695 end Get_Ignore_Errors
;
1701 procedure Initialize
is
1704 First_Error_Msg
:= No_Error_Msg
;
1705 Last_Error_Msg
:= No_Error_Msg
;
1706 Serious_Errors_Detected
:= 0;
1707 Total_Errors_Detected
:= 0;
1708 Cur_Msg
:= No_Error_Msg
;
1711 -- Reset counts for warnings
1715 -- Initialize warnings tables
1718 Specific_Warnings
.Init
;
1721 -------------------------------
1722 -- Is_Size_Too_Small_Message --
1723 -------------------------------
1725 function Is_Size_Too_Small_Message
(S
: String) return Boolean is
1726 Size_For
: constant String := "size for";
1727 pragma Assert
(Size_Too_Small_Message
(1 .. Size_For
'Last) = Size_For
);
1728 -- Assert that Size_Too_Small_Message starts with Size_For
1730 return S
'Length >= Size_For
'Length
1731 and then S
(S
'First .. S
'First + Size_For
'Length - 1) = Size_For
;
1732 -- True if S starts with Size_For
1733 end Is_Size_Too_Small_Message
;
1739 function No_Warnings
(N
: Node_Or_Entity_Id
) return Boolean is
1741 if Error_Posted
(N
) then
1744 elsif Nkind
(N
) in N_Entity
and then Has_Warnings_Off
(N
) then
1747 elsif Is_Entity_Name
(N
)
1748 and then Present
(Entity
(N
))
1749 and then Has_Warnings_Off
(Entity
(N
))
1762 function OK_Node
(N
: Node_Id
) return Boolean is
1763 K
: constant Node_Kind
:= Nkind
(N
);
1766 if Error_Posted
(N
) then
1769 elsif K
in N_Has_Etype
1770 and then Present
(Etype
(N
))
1771 and then Error_Posted
(Etype
(N
))
1776 or else K
= N_Attribute_Reference
1777 or else K
= N_Character_Literal
1778 or else K
= N_Expanded_Name
1779 or else K
= N_Identifier
1780 or else K
= N_Operator_Symbol
)
1781 and then Present
(Entity
(N
))
1782 and then Error_Posted
(Entity
(N
))
1790 ---------------------
1791 -- Output_Messages --
1792 ---------------------
1794 procedure Output_Messages
is
1798 procedure Write_Error_Summary
;
1799 -- Write error summary
1801 procedure Write_Header
(Sfile
: Source_File_Index
);
1802 -- Write header line (compiling or checking given file)
1804 procedure Write_Max_Errors
;
1805 -- Write message if max errors reached
1807 -------------------------
1808 -- Write_Error_Summary --
1809 -------------------------
1811 procedure Write_Error_Summary
is
1813 -- Extra blank line if error messages or source listing were output
1815 if Total_Errors_Detected
+ Warnings_Detected
> 0 or else Full_List
1820 -- Message giving number of lines read and number of errors detected.
1821 -- This normally goes to Standard_Output. The exception is when brief
1822 -- mode is not set, verbose mode (or full list mode) is set, and
1823 -- there are errors. In this case we send the message to standard
1824 -- error to make sure that *something* appears on standard error
1825 -- in an error situation.
1827 if Total_Errors_Detected
+ Warnings_Detected
/= 0
1828 and then not Brief_Output
1829 and then (Verbose_Mode
or Full_List
)
1834 -- Message giving total number of lines. Don't give this message if
1835 -- the Main_Source line is unknown (this happens in error situations,
1836 -- e.g. when integrated preprocessing fails).
1838 if Main_Source_File
> No_Source_File
then
1840 Write_Int
(Num_Source_Lines
(Main_Source_File
));
1842 if Num_Source_Lines
(Main_Source_File
) = 1 then
1843 Write_Str
(" line: ");
1845 Write_Str
(" lines: ");
1849 if Total_Errors_Detected
= 0 then
1850 Write_Str
("No errors");
1852 elsif Total_Errors_Detected
= 1 then
1853 Write_Str
("1 error");
1856 Write_Int
(Total_Errors_Detected
);
1857 Write_Str
(" errors");
1860 if Warnings_Detected
- Warning_Info_Messages
/= 0 then
1862 Write_Int
(Warnings_Detected
);
1863 Write_Str
(" warning");
1865 if Warnings_Detected
- Warning_Info_Messages
/= 1 then
1869 if Warning_Mode
= Treat_As_Error
then
1870 Write_Str
(" (treated as error");
1872 if Warnings_Detected
/= 1 then
1878 elsif Warnings_Treated_As_Errors
/= 0 then
1880 Write_Int
(Warnings_Treated_As_Errors
);
1881 Write_Str
(" treated as errors)");
1885 if Warning_Info_Messages
+ Report_Info_Messages
/= 0 then
1887 Write_Int
(Warning_Info_Messages
+ Report_Info_Messages
);
1888 Write_Str
(" info message");
1890 if Warning_Info_Messages
+ Report_Info_Messages
> 1 then
1896 Set_Standard_Output
;
1897 end Write_Error_Summary
;
1903 procedure Write_Header
(Sfile
: Source_File_Index
) is
1905 if Verbose_Mode
or Full_List
then
1906 if Original_Operating_Mode
= Generate_Code
then
1907 Write_Str
("Compiling: ");
1909 Write_Str
("Checking: ");
1912 Write_Name
(Full_File_Name
(Sfile
));
1914 if not Debug_Flag_7
then
1916 Write_Str
("Source file time stamp: ");
1917 Write_Time_Stamp
(Sfile
);
1919 Write_Str
("Compiled at: " & Compilation_Time
);
1926 ----------------------
1927 -- Write_Max_Errors --
1928 ----------------------
1930 procedure Write_Max_Errors
is
1932 if Maximum_Messages
/= 0 then
1933 if Warnings_Detected
>= Maximum_Messages
then
1935 Write_Line
("maximum number of warnings output");
1936 Write_Line
("any further warnings suppressed");
1937 Set_Standard_Output
;
1940 -- If too many errors print message
1942 if Total_Errors_Detected
>= Maximum_Messages
then
1944 Write_Line
("fatal error: maximum number of errors detected");
1945 Set_Standard_Output
;
1948 end Write_Max_Errors
;
1950 -- Start of processing for Output_Messages
1953 -- Error if Finalize has not been called
1955 if not Finalize_Called
then
1956 raise Program_Error
;
1959 -- Reset current error source file if the main unit has a pragma
1960 -- Source_Reference. This ensures outputting the proper name of
1961 -- the source file in this situation.
1963 if Main_Source_File
<= No_Source_File
1964 or else Num_SRef_Pragmas
(Main_Source_File
) /= 0
1966 Current_Error_Source_File
:= No_Source_File
;
1971 if Brief_Output
or (not Full_List
and not Verbose_Mode
) then
1974 E
:= First_Error_Msg
;
1975 while E
/= No_Error_Msg
loop
1976 if not Errors
.Table
(E
).Deleted
and then not Debug_Flag_KK
then
1977 if Full_Path_Name_For_Brief_Errors
then
1978 Write_Name
(Full_Ref_Name
(Errors
.Table
(E
).Sfile
));
1980 Write_Name
(Reference_Name
(Errors
.Table
(E
).Sfile
));
1984 Write_Int
(Int
(Physical_To_Logical
1985 (Errors
.Table
(E
).Line
,
1986 Errors
.Table
(E
).Sfile
)));
1989 if Errors
.Table
(E
).Col
< 10 then
1993 Write_Int
(Int
(Errors
.Table
(E
).Col
));
1995 Output_Msg_Text
(E
);
1999 E
:= Errors
.Table
(E
).Next
;
2002 Set_Standard_Output
;
2005 -- Full source listing case
2008 List_Pragmas_Index
:= 1;
2009 List_Pragmas_Mode
:= True;
2010 E
:= First_Error_Msg
;
2012 -- Normal case, to stdout (copyright notice already output)
2014 if Full_List_File_Name
= null then
2015 if not Debug_Flag_7
then
2022 Create_List_File_Access
.all (Full_List_File_Name
.all);
2023 Set_Special_Output
(Write_List_Info_Access
.all'Access);
2025 -- Write copyright notice to file
2027 if not Debug_Flag_7
then
2028 Write_Str
("GNAT ");
2029 Write_Str
(Gnat_Version_String
);
2031 Write_Str
("Copyright 1992-" &
2033 ", Free Software Foundation, Inc.");
2038 -- First list extended main source file units with errors
2040 for U
in Main_Unit
.. Last_Unit
loop
2041 if In_Extended_Main_Source_Unit
(Cunit_Entity
(U
))
2043 -- If debug flag d.m is set, only the main source is listed
2045 and then (U
= Main_Unit
or else not Debug_Flag_Dot_M
)
2047 -- If the unit of the entity does not come from source, it is
2048 -- an implicit subprogram declaration for a child subprogram.
2049 -- Do not emit errors for it, they are listed with the body.
2052 (No
(Cunit_Entity
(U
))
2053 or else Comes_From_Source
(Cunit_Entity
(U
))
2054 or else not Is_Subprogram
(Cunit_Entity
(U
)))
2056 -- If the compilation unit associated with this unit does not
2057 -- come from source, it means it is an instantiation that should
2058 -- not be included in the source listing.
2060 and then Comes_From_Source
(Cunit
(U
))
2063 Sfile
: constant Source_File_Index
:= Source_Index
(U
);
2068 -- Only write the header if Sfile is known
2070 if Sfile
> No_Source_File
then
2071 Write_Header
(Sfile
);
2075 -- Normally, we don't want an "error messages from file"
2076 -- message when listing the entire file, so we set the
2077 -- current source file as the current error source file.
2078 -- However, the old style of doing things was to list this
2079 -- message if pragma Source_Reference is present, even for
2080 -- the main unit. Since the purpose of the -gnatd.m switch
2081 -- is to duplicate the old behavior, we skip the reset if
2082 -- this debug flag is set.
2084 if not Debug_Flag_Dot_M
then
2085 Current_Error_Source_File
:= Sfile
;
2088 -- Only output the listing if Sfile is known, to avoid
2089 -- crashing the compiler.
2091 if Sfile
> No_Source_File
then
2092 for N
in 1 .. Last_Source_Line
(Sfile
) loop
2093 while E
/= No_Error_Msg
2094 and then Errors
.Table
(E
).Deleted
2096 E
:= Errors
.Table
(E
).Next
;
2101 and then Errors
.Table
(E
).Line
= N
2102 and then Errors
.Table
(E
).Sfile
= Sfile
;
2104 Output_Source_Line
(N
, Sfile
, Err_Flag
);
2107 Output_Error_Msgs
(E
);
2109 if not Debug_Flag_2
then
2119 -- Then output errors, if any, for subsidiary units not in the
2120 -- main extended unit.
2122 -- Note: if debug flag d.m set, include errors for any units other
2123 -- than the main unit in the extended source unit (e.g. spec and
2124 -- subunits for a body).
2126 while E
/= No_Error_Msg
2127 and then (not In_Extended_Main_Source_Unit
(Errors
.Table
(E
).Sptr
)
2130 and then Get_Source_Unit
2131 (Errors
.Table
(E
).Sptr
) /= Main_Unit
))
2133 if Errors
.Table
(E
).Deleted
then
2134 E
:= Errors
.Table
(E
).Next
;
2139 (Errors
.Table
(E
).Line
, Errors
.Table
(E
).Sfile
, True);
2140 Output_Error_Msgs
(E
);
2144 -- If output to file, write extra copy of error summary to the
2145 -- output file, and then close it.
2147 if Full_List_File_Name
/= null then
2148 Write_Error_Summary
;
2150 Close_List_File_Access
.all;
2151 Cancel_Special_Output
;
2155 -- Verbose mode (error lines only with error flags). Normally this is
2156 -- ignored in full list mode, unless we are listing to a file, in which
2157 -- case we still generate -gnatv output to standard output.
2160 and then (not Full_List
or else Full_List_File_Name
/= null)
2164 -- Output the header only when Main_Source_File is known
2166 if Main_Source_File
> No_Source_File
then
2167 Write_Header
(Main_Source_File
);
2170 E
:= First_Error_Msg
;
2172 -- Loop through error lines
2174 while E
/= No_Error_Msg
loop
2175 if Errors
.Table
(E
).Deleted
then
2176 E
:= Errors
.Table
(E
).Next
;
2180 (Errors
.Table
(E
).Line
, Errors
.Table
(E
).Sfile
, True);
2181 Output_Error_Msgs
(E
);
2186 -- Output error summary if verbose or full list mode
2188 if Verbose_Mode
or else Full_List
then
2189 Write_Error_Summary
;
2194 -- Even though Warning_Info_Messages are a subclass of warnings, they
2195 -- must not be treated as errors when -gnatwe is in effect.
2197 if Warning_Mode
= Treat_As_Error
then
2198 Total_Errors_Detected
:=
2199 Total_Errors_Detected
+ Warnings_Detected
- Warning_Info_Messages
;
2200 Warnings_Detected
:= Warning_Info_Messages
;
2202 end Output_Messages
;
2204 ------------------------
2205 -- Output_Source_Line --
2206 ------------------------
2208 procedure Output_Source_Line
2209 (L
: Physical_Line_Number
;
2210 Sfile
: Source_File_Index
;
2216 Line_Number_Output
: Boolean := False;
2217 -- Set True once line number is output
2219 Empty_Line
: Boolean := True;
2220 -- Set False if line includes at least one character
2223 if Sfile
/= Current_Error_Source_File
then
2224 Write_Str
("==============Error messages for ");
2226 case Sinput
.File_Type
(Sfile
) is
2228 Write_Str
("source");
2230 when Sinput
.Config
=>
2231 Write_Str
("configuration pragmas");
2234 Write_Str
("symbol definition");
2236 when Sinput
.Preproc
=>
2237 Write_Str
("preprocessing data");
2240 Write_Str
(" file: ");
2241 Write_Name
(Full_File_Name
(Sfile
));
2244 if Num_SRef_Pragmas
(Sfile
) > 0 then
2245 Write_Str
("--------------Line numbers from file: ");
2246 Write_Name
(Full_Ref_Name
(Sfile
));
2247 Write_Str
(" (starting at line ");
2248 Write_Int
(Int
(First_Mapped_Line
(Sfile
)));
2253 Current_Error_Source_File
:= Sfile
;
2256 if Errs
or List_Pragmas_Mode
then
2257 Output_Line_Number
(Physical_To_Logical
(L
, Sfile
));
2258 Line_Number_Output
:= True;
2261 S
:= Line_Start
(L
, Sfile
);
2264 C
:= Source_Text
(Sfile
) (S
);
2265 exit when C
= ASCII
.LF
or else C
= ASCII
.CR
or else C
= EOF
;
2267 -- Deal with matching entry in List_Pragmas table
2270 and then List_Pragmas_Index
<= List_Pragmas
.Last
2271 and then S
= List_Pragmas
.Table
(List_Pragmas_Index
).Ploc
2273 case List_Pragmas
.Table
(List_Pragmas_Index
).Ptyp
is
2277 -- Ignore if on line with errors so that error flags
2278 -- get properly listed with the error line .
2281 Write_Char
(ASCII
.FF
);
2285 List_Pragmas_Mode
:= True;
2287 if not Line_Number_Output
then
2288 Output_Line_Number
(Physical_To_Logical
(L
, Sfile
));
2289 Line_Number_Output
:= True;
2296 List_Pragmas_Mode
:= False;
2299 List_Pragmas_Index
:= List_Pragmas_Index
+ 1;
2301 -- Normal case (no matching entry in List_Pragmas table)
2304 if Errs
or List_Pragmas_Mode
then
2309 Empty_Line
:= False;
2313 -- If we have output a source line, then add the line terminator, with
2314 -- training spaces preserved (so we output the line exactly as input).
2316 if Line_Number_Output
then
2320 Write_Eol_Keep_Blanks
;
2323 end Output_Source_Line
;
2325 -----------------------------
2326 -- Remove_Warning_Messages --
2327 -----------------------------
2329 procedure Remove_Warning_Messages
(N
: Node_Id
) is
2331 function Check_For_Warning
(N
: Node_Id
) return Traverse_Result
;
2332 -- This function checks one node for a possible warning message
2334 function Check_All_Warnings
is new Traverse_Func
(Check_For_Warning
);
2335 -- This defines the traversal operation
2337 -----------------------
2338 -- Check_For_Warning --
2339 -----------------------
2341 function Check_For_Warning
(N
: Node_Id
) return Traverse_Result
is
2342 Loc
: constant Source_Ptr
:= Sloc
(N
);
2345 function To_Be_Removed
(E
: Error_Msg_Id
) return Boolean;
2346 -- Returns True for a message that is to be removed. Also adjusts
2347 -- warning count appropriately.
2353 function To_Be_Removed
(E
: Error_Msg_Id
) return Boolean is
2355 if E
/= No_Error_Msg
2357 -- Don't remove if location does not match
2359 and then Errors
.Table
(E
).Optr
= Loc
2361 -- Don't remove if not warning/info message. Note that we do
2362 -- not remove style messages here. They are warning messages
2363 -- but not ones we want removed in this context.
2365 and then Errors
.Table
(E
).Warn
2367 -- Don't remove unconditional messages
2369 and then not Errors
.Table
(E
).Uncond
2371 Warnings_Detected
:= Warnings_Detected
- 1;
2373 if Errors
.Table
(E
).Info
then
2374 Warning_Info_Messages
:= Warning_Info_Messages
- 1;
2379 -- No removal required
2386 -- Start of processing for Check_For_Warnings
2389 while To_Be_Removed
(First_Error_Msg
) loop
2390 First_Error_Msg
:= Errors
.Table
(First_Error_Msg
).Next
;
2393 if First_Error_Msg
= No_Error_Msg
then
2394 Last_Error_Msg
:= No_Error_Msg
;
2397 E
:= First_Error_Msg
;
2398 while E
/= No_Error_Msg
loop
2399 while To_Be_Removed
(Errors
.Table
(E
).Next
) loop
2400 Errors
.Table
(E
).Next
:=
2401 Errors
.Table
(Errors
.Table
(E
).Next
).Next
;
2403 if Errors
.Table
(E
).Next
= No_Error_Msg
then
2404 Last_Error_Msg
:= E
;
2408 E
:= Errors
.Table
(E
).Next
;
2411 if Nkind
(N
) = N_Raise_Constraint_Error
2412 and then Is_Rewrite_Substitution
(N
)
2413 and then No
(Condition
(N
))
2415 -- Warnings may have been posted on subexpressions of the original
2416 -- tree. We place the original node back on the tree to remove
2417 -- those warnings, whose sloc do not match those of any node in
2418 -- the current tree. Given that we are in unreachable code, this
2419 -- modification to the tree is harmless.
2422 Status
: Traverse_Final_Result
;
2425 if Is_List_Member
(N
) then
2426 Set_Condition
(N
, Original_Node
(N
));
2427 Status
:= Check_All_Warnings
(Condition
(N
));
2429 Rewrite
(N
, Original_Node
(N
));
2430 Status
:= Check_All_Warnings
(N
);
2439 end Check_For_Warning
;
2441 -- Start of processing for Remove_Warning_Messages
2444 if Warnings_Detected
/= 0 then
2446 Discard
: Traverse_Final_Result
;
2447 pragma Warnings
(Off
, Discard
);
2450 Discard
:= Check_All_Warnings
(N
);
2453 end Remove_Warning_Messages
;
2455 procedure Remove_Warning_Messages
(L
: List_Id
) is
2458 if Is_Non_Empty_List
(L
) then
2460 while Present
(Stat
) loop
2461 Remove_Warning_Messages
(Stat
);
2465 end Remove_Warning_Messages
;
2467 --------------------
2468 -- Reset_Warnings --
2469 --------------------
2471 procedure Reset_Warnings
is
2473 Warnings_Treated_As_Errors
:= 0;
2474 Warnings_Detected
:= 0;
2475 Warning_Info_Messages
:= 0;
2476 Warnings_As_Errors_Count
:= 0;
2479 ----------------------
2480 -- Adjust_Name_Case --
2481 ----------------------
2483 procedure Adjust_Name_Case
2484 (Buf
: in out Bounded_String
;
2488 -- We have an all lower case name from Namet, and now we want to set
2489 -- the appropriate case. If possible we copy the actual casing from
2490 -- the source. If not we use standard identifier casing.
2493 Src_Ind
: constant Source_File_Index
:= Get_Source_File_Index
(Loc
);
2494 Sbuffer
: Source_Buffer_Ptr
;
2496 Src_Ptr
: Source_Ptr
;
2502 -- For standard locations, always use mixed case
2504 if Loc
<= No_Location
then
2505 Set_Casing
(Mixed_Case
);
2508 -- Determine if the reference we are dealing with corresponds to
2509 -- text at the point of the error reference. This will often be
2510 -- the case for simple identifier references, and is the case
2511 -- where we can copy the casing from the source.
2513 Sbuffer
:= Source_Text
(Src_Ind
);
2515 while Ref_Ptr
<= Buf
.Length
loop
2517 Fold_Lower
(Sbuffer
(Src_Ptr
)) /=
2518 Fold_Lower
(Buf
.Chars
(Ref_Ptr
));
2519 Ref_Ptr
:= Ref_Ptr
+ 1;
2520 Src_Ptr
:= Src_Ptr
+ 1;
2523 -- If we get through the loop without a mismatch, then output the
2524 -- name the way it is cased in the source program
2526 if Ref_Ptr
> Buf
.Length
then
2529 for J
in 1 .. Buf
.Length
loop
2530 Buf
.Chars
(J
) := Sbuffer
(Src_Ptr
);
2531 Src_Ptr
:= Src_Ptr
+ 1;
2534 -- Otherwise set the casing using the default identifier casing
2537 Set_Casing
(Buf
, Identifier_Casing
(Src_Ind
));
2541 end Adjust_Name_Case
;
2543 procedure Adjust_Name_Case
(Loc
: Source_Ptr
) is
2545 Adjust_Name_Case
(Global_Name_Buffer
, Loc
);
2546 end Adjust_Name_Case
;
2548 ---------------------------
2549 -- Set_Identifier_Casing --
2550 ---------------------------
2552 procedure Set_Identifier_Casing
2553 (Identifier_Name
: System
.Address
;
2554 File_Name
: System
.Address
)
2556 Ident
: constant Big_String_Ptr
:= To_Big_String_Ptr
(Identifier_Name
);
2557 File
: constant Big_String_Ptr
:= To_Big_String_Ptr
(File_Name
);
2560 Desired_Case
: Casing_Type
:= Mixed_Case
;
2561 -- Casing required for result. Default value of Mixed_Case is used if
2562 -- for some reason we cannot find the right file name in the table.
2565 -- Get length of file name
2568 while File
(Flen
+ 1) /= ASCII
.NUL
loop
2572 -- Loop through file names to find matching one. This is a bit slow, but
2573 -- we only do it in error situations so it is not so terrible. Note that
2574 -- if the loop does not exit, then the desired case will be left set to
2575 -- Mixed_Case, this can happen if the name was not in canonical form.
2577 for J
in 1 .. Last_Source_File
loop
2578 Get_Name_String
(Full_Debug_Name
(J
));
2581 and then Name_Buffer
(1 .. Name_Len
) = String (File
(1 .. Flen
))
2583 Desired_Case
:= Identifier_Casing
(J
);
2588 -- Copy identifier as given to Name_Buffer
2590 for J
in Name_Buffer
'Range loop
2591 Name_Buffer
(J
) := Ident
(J
);
2593 if Name_Buffer
(J
) = ASCII
.NUL
then
2599 Set_Casing
(Desired_Case
);
2600 end Set_Identifier_Casing
;
2602 -----------------------
2603 -- Set_Ignore_Errors --
2604 -----------------------
2606 procedure Set_Ignore_Errors
(To
: Boolean) is
2608 Errors_Must_Be_Ignored
:= To
;
2609 end Set_Ignore_Errors
;
2611 ------------------------------
2612 -- Set_Msg_Insertion_Column --
2613 ------------------------------
2615 procedure Set_Msg_Insertion_Column
is
2617 if RM_Column_Check
then
2618 Set_Msg_Str
(" in column ");
2619 Set_Msg_Int
(Int
(Error_Msg_Col
) + 1);
2621 end Set_Msg_Insertion_Column
;
2623 ----------------------------
2624 -- Set_Msg_Insertion_Node --
2625 ----------------------------
2627 procedure Set_Msg_Insertion_Node
is
2632 Error_Msg_Node_1
= Error
2633 or else Error_Msg_Node_1
= Any_Type
;
2635 if Error_Msg_Node_1
= Empty
then
2636 Set_Msg_Blank_Conditional
;
2637 Set_Msg_Str
("<empty>");
2639 elsif Error_Msg_Node_1
= Error
then
2641 Set_Msg_Str
("<error>");
2643 elsif Error_Msg_Node_1
= Standard_Void_Type
then
2645 Set_Msg_Str
("procedure name");
2647 elsif Nkind
(Error_Msg_Node_1
) in N_Entity
2648 and then Ekind
(Error_Msg_Node_1
) = E_Anonymous_Access_Subprogram_Type
2651 Set_Msg_Str
("access to subprogram");
2654 Set_Msg_Blank_Conditional
;
2658 K
:= Nkind
(Error_Msg_Node_1
);
2660 -- If we have operator case, skip quotes since name of operator
2661 -- itself will supply the required quotations. An operator can be an
2662 -- applied use in an expression or an explicit operator symbol, or an
2663 -- identifier whose name indicates it is an operator.
2666 or else K
= N_Operator_Symbol
2667 or else K
= N_Defining_Operator_Symbol
2668 or else ((K
= N_Identifier
or else K
= N_Defining_Identifier
)
2669 and then Is_Operator_Name
(Chars
(Error_Msg_Node_1
)))
2671 Set_Msg_Node
(Error_Msg_Node_1
);
2673 -- Normal case, not an operator, surround with quotes
2677 Set_Qualification
(Error_Msg_Qual_Level
, Error_Msg_Node_1
);
2678 Set_Msg_Node
(Error_Msg_Node_1
);
2683 -- The following assignment ensures that a second ampersand insertion
2684 -- character will correspond to the Error_Msg_Node_2 parameter. We
2685 -- suppress possible validity checks in case operating in -gnatVa mode,
2686 -- and Error_Msg_Node_2 is not needed and has not been set.
2689 pragma Suppress
(Range_Check
);
2691 Error_Msg_Node_1
:= Error_Msg_Node_2
;
2693 end Set_Msg_Insertion_Node
;
2695 --------------------------------------
2696 -- Set_Msg_Insertion_Type_Reference --
2697 --------------------------------------
2699 procedure Set_Msg_Insertion_Type_Reference
(Flag
: Source_Ptr
) is
2705 if Error_Msg_Node_1
= Standard_Void_Type
then
2706 Set_Msg_Str
("package or procedure name");
2709 elsif Error_Msg_Node_1
= Standard_Exception_Type
then
2710 Set_Msg_Str
("exception name");
2713 elsif Error_Msg_Node_1
= Any_Access
2714 or else Error_Msg_Node_1
= Any_Array
2715 or else Error_Msg_Node_1
= Any_Boolean
2716 or else Error_Msg_Node_1
= Any_Character
2717 or else Error_Msg_Node_1
= Any_Composite
2718 or else Error_Msg_Node_1
= Any_Discrete
2719 or else Error_Msg_Node_1
= Any_Fixed
2720 or else Error_Msg_Node_1
= Any_Integer
2721 or else Error_Msg_Node_1
= Any_Modular
2722 or else Error_Msg_Node_1
= Any_Numeric
2723 or else Error_Msg_Node_1
= Any_Real
2724 or else Error_Msg_Node_1
= Any_Scalar
2725 or else Error_Msg_Node_1
= Any_String
2727 Get_Unqualified_Decoded_Name_String
(Chars
(Error_Msg_Node_1
));
2728 Set_Msg_Name_Buffer
;
2731 elsif Error_Msg_Node_1
= Universal_Real
then
2732 Set_Msg_Str
("type universal real");
2735 elsif Error_Msg_Node_1
= Universal_Integer
then
2736 Set_Msg_Str
("type universal integer");
2739 elsif Error_Msg_Node_1
= Universal_Fixed
then
2740 Set_Msg_Str
("type universal fixed");
2744 -- Special case of anonymous array
2746 if Nkind
(Error_Msg_Node_1
) in N_Entity
2747 and then Is_Array_Type
(Error_Msg_Node_1
)
2748 and then Present
(Related_Array_Object
(Error_Msg_Node_1
))
2750 Set_Msg_Str
("type of ");
2751 Set_Msg_Node
(Related_Array_Object
(Error_Msg_Node_1
));
2752 Set_Msg_Str
(" declared");
2753 Set_Msg_Insertion_Line_Number
2754 (Sloc
(Related_Array_Object
(Error_Msg_Node_1
)), Flag
);
2758 -- If we fall through, it is not a special case, so first output
2759 -- the name of the type, preceded by private for a private type
2761 if Is_Private_Type
(Error_Msg_Node_1
) then
2762 Set_Msg_Str
("private type ");
2764 Set_Msg_Str
("type ");
2767 Ent
:= Error_Msg_Node_1
;
2769 if Is_Internal_Name
(Chars
(Ent
)) then
2770 Unwind_Internal_Type
(Ent
);
2773 -- Types in Standard are displayed as "Standard.name"
2775 if Sloc
(Ent
) <= Standard_Location
then
2777 Set_Msg_Str
("Standard.");
2782 -- Types in other language defined units are displayed as
2783 -- "package-name.type-name"
2785 elsif Is_Predefined_Unit
(Get_Source_Unit
(Ent
)) then
2786 Get_Unqualified_Decoded_Name_String
2787 (Unit_Name
(Get_Source_Unit
(Ent
)));
2788 Name_Len
:= Name_Len
- 2;
2789 Set_Msg_Blank_Conditional
;
2791 Set_Casing
(Mixed_Case
);
2792 Set_Msg_Name_Buffer
;
2794 Set_Casing
(Mixed_Case
);
2799 -- All other types display as "type name" defined at line xxx
2800 -- possibly qualified if qualification is requested.
2804 Set_Qualification
(Error_Msg_Qual_Level
, Ent
);
2808 -- If we did not print a name (e.g. in the case of an anonymous
2809 -- subprogram type), there is no name to print, so remove quotes.
2811 if Buffer_Ends_With
('"') then
2812 Buffer_Remove
('"');
2818 -- If the original type did not come from a predefined file, add the
2819 -- location where the type was defined.
2821 if Sloc
(Error_Msg_Node_1
) > Standard_Location
2823 not Is_Predefined_Unit
(Get_Source_Unit
(Error_Msg_Node_1
))
2825 Get_Name_String
(Unit_File_Name
(Get_Source_Unit
(Error_Msg_Node_1
)));
2826 Set_Msg_Str
(" defined");
2827 Set_Msg_Insertion_Line_Number
(Sloc
(Error_Msg_Node_1
), Flag
);
2829 -- If it did come from a predefined file, deal with the case where
2830 -- this was a file with a generic instantiation from elsewhere.
2833 if Sloc
(Error_Msg_Node_1
) > Standard_Location
then
2835 Iloc
: constant Source_Ptr
:=
2836 Instantiation_Location
(Sloc
(Error_Msg_Node_1
));
2839 if Iloc
/= No_Location
2840 and then not Suppress_Instance_Location
2842 Set_Msg_Str
(" from instance");
2843 Set_Msg_Insertion_Line_Number
(Iloc
, Flag
);
2848 end Set_Msg_Insertion_Type_Reference
;
2850 ---------------------------------
2851 -- Set_Msg_Insertion_Unit_Name --
2852 ---------------------------------
2854 procedure Set_Msg_Insertion_Unit_Name
(Suffix
: Boolean := True) is
2856 if Error_Msg_Unit_1
= No_Unit_Name
then
2859 elsif Error_Msg_Unit_1
= Error_Unit_Name
then
2861 Set_Msg_Str
("<error>");
2864 Get_Unit_Name_String
(Error_Msg_Unit_1
, Suffix
);
2867 Set_Msg_Name_Buffer
;
2871 -- The following assignment ensures that a second percent insertion
2872 -- character will correspond to the Error_Msg_Unit_2 parameter. We
2873 -- suppress possible validity checks in case operating in -gnatVa mode,
2874 -- and Error_Msg_Unit_2 is not needed and has not been set.
2877 pragma Suppress
(Range_Check
);
2879 Error_Msg_Unit_1
:= Error_Msg_Unit_2
;
2881 end Set_Msg_Insertion_Unit_Name
;
2887 procedure Set_Msg_Node
(Node
: Node_Id
) is
2893 case Nkind
(Node
) is
2894 when N_Designator
=>
2895 Set_Msg_Node
(Name
(Node
));
2897 Set_Msg_Node
(Identifier
(Node
));
2900 when N_Defining_Program_Unit_Name
=>
2901 Set_Msg_Node
(Name
(Node
));
2903 Set_Msg_Node
(Defining_Identifier
(Node
));
2906 when N_Expanded_Name
2907 | N_Selected_Component
2909 Set_Msg_Node
(Prefix
(Node
));
2911 Set_Msg_Node
(Selector_Name
(Node
));
2918 -- The only remaining possibilities are identifiers, defining
2919 -- identifiers, pragmas, and pragma argument associations.
2921 if Nkind
(Node
) = N_Pragma
then
2922 Nam
:= Pragma_Name
(Node
);
2925 -- The other cases have Chars fields
2927 -- First deal with internal names, which generally represent something
2928 -- gone wrong. First attempt: if this is a rewritten node that rewrites
2929 -- something with a Chars field that is not an internal name, use that.
2931 elsif Is_Internal_Name
(Chars
(Node
))
2932 and then Nkind
(Original_Node
(Node
)) in N_Has_Chars
2933 and then not Is_Internal_Name
(Chars
(Original_Node
(Node
)))
2935 Nam
:= Chars
(Original_Node
(Node
));
2936 Loc
:= Sloc
(Original_Node
(Node
));
2938 -- Another shot for internal names, in the case of internal type names,
2939 -- we try to find a reasonable representation for the external name.
2941 elsif Is_Internal_Name
(Chars
(Node
))
2943 ((Is_Entity_Name
(Node
)
2944 and then Present
(Entity
(Node
))
2945 and then Is_Type
(Entity
(Node
)))
2947 (Nkind
(Node
) = N_Defining_Identifier
and then Is_Type
(Node
)))
2949 if Nkind
(Node
) = N_Identifier
then
2950 Ent
:= Entity
(Node
);
2957 -- If the type is the designated type of an access_to_subprogram,
2958 -- then there is no name to provide in the call.
2960 if Ekind
(Ent
) = E_Subprogram_Type
then
2963 -- Otherwise, we will be able to find some kind of name to output
2966 Unwind_Internal_Type
(Ent
);
2970 -- If not internal name, or if we could not find a reasonable possible
2971 -- substitution for the internal name, just use name in Chars field.
2974 Nam
:= Chars
(Node
);
2978 -- At this stage, the name to output is in Nam
2980 Get_Unqualified_Decoded_Name_String
(Nam
);
2982 -- Remove trailing upper case letters from the name (useful for
2983 -- dealing with some cases of internal names).
2985 while Name_Len
> 1 and then Name_Buffer
(Name_Len
) in 'A' .. 'Z' loop
2986 Name_Len
:= Name_Len
- 1;
2989 -- If we have any of the names from standard that start with the
2990 -- characters "any " (e.g. Any_Type), then kill the message since
2991 -- almost certainly it is a junk cascaded message.
2994 and then Name_Buffer
(1 .. 4) = "any "
2996 Kill_Message
:= True;
2999 -- If we still have an internal name, kill the message (will only
3000 -- work if we already had errors!)
3002 if Is_Internal_Name
then
3003 Kill_Message
:= True;
3005 -- Remaining step is to adjust casing and possibly add 'Class
3007 Adjust_Name_Case
(Global_Name_Buffer
, Loc
);
3008 Set_Msg_Name_Buffer
;
3016 procedure Set_Msg_Text
(Text
: String; Flag
: Source_Ptr
) is
3017 C
: Character; -- Current character
3018 P
: Natural; -- Current index;
3020 procedure Skip_Msg_Insertion_Warning
(C
: Character);
3021 -- Deal with ? ?? ?x? ?X? ?*? ?$? insertion sequences (and the same
3022 -- sequences using < instead of ?). The caller has already bumped
3023 -- the pointer past the initial ? or < and C is set to this initial
3024 -- character (? or <). This procedure skips past the rest of the
3025 -- sequence. We do not need to set Msg_Insertion_Char, since this
3026 -- was already done during the message prescan.
3028 --------------------------------
3029 -- Skip_Msg_Insertion_Warning --
3030 --------------------------------
3032 procedure Skip_Msg_Insertion_Warning
(C
: Character) is
3034 if P
<= Text
'Last and then Text
(P
) = C
then
3037 elsif P
+ 1 <= Text
'Last
3038 and then (Text
(P
) in 'a' .. 'z'
3040 Text
(P
) in 'A' .. 'Z'
3045 and then Text
(P
+ 1) = C
3049 end Skip_Msg_Insertion_Warning
;
3051 -- Start of processing for Set_Msg_Text
3054 Manual_Quote_Mode
:= False;
3056 Flag_Source
:= Get_Source_File_Index
(Flag
);
3058 -- Skip info: at start, we have recorded this in Is_Info_Msg, and this
3059 -- will be used (Info field in error message object) to put back the
3060 -- string when it is printed. We need to do this, or we get confused
3061 -- with instantiation continuations.
3064 and then Text
(Text
'First .. Text
'First + 5) = "info: "
3066 P
:= Text
'First + 6;
3071 -- Loop through characters of message
3073 while P
<= Text
'Last loop
3077 -- Check for insertion character or sequence
3081 if P
<= Text
'Last and then Text
(P
) = '%' then
3083 Set_Msg_Insertion_Name_Literal
;
3085 Set_Msg_Insertion_Name
;
3089 if P
<= Text
'Last and then Text
(P
) = '$' then
3091 Set_Msg_Insertion_Unit_Name
(Suffix
=> False);
3093 Set_Msg_Insertion_Unit_Name
;
3097 Set_Msg_Insertion_File_Name
;
3100 Set_Msg_Insertion_Type_Reference
(Flag
);
3103 Set_Msg_Insertion_Reserved_Name
;
3106 Set_Msg_Insertion_Node
;
3109 Set_Msg_Insertion_Line_Number
(Error_Msg_Sloc
, Flag
);
3112 Continuation
:= True;
3114 if P
<= Text
'Last and then Text
(P
) = '\' then
3115 Continuation_New_Line
:= True;
3120 Set_Msg_Insertion_Column
;
3123 Set_Msg_Insertion_Run_Time_Name
;
3126 Set_Msg_Insertion_Uint
;
3129 Manual_Quote_Mode
:= not Manual_Quote_Mode
;
3133 null; -- already dealt with
3136 Skip_Msg_Insertion_Warning
('?');
3139 Skip_Msg_Insertion_Warning
('<');
3142 null; -- already dealt with
3145 Set_Msg_Char
(Text
(P
));
3149 Set_Msg_Str
(Error_Msg_String
(1 .. Error_Msg_Strlen
));
3151 -- Upper case letter
3155 -- Start of reserved word if two or more
3157 if P
<= Text
'Last and then Text
(P
) in 'A' .. 'Z' then
3159 Set_Msg_Insertion_Reserved_Word
(Text
, P
);
3161 -- Single upper case letter is just inserted
3167 -- '[' (will be/would have been raised at run time)
3171 -- Switch the message from a warning to an error if the flag
3172 -- -gnatwE is specified to treat run-time exception warnings
3176 and then Warning_Mode
= Treat_Run_Time_Warnings_As_Errors
3178 Is_Warning_Msg
:= False;
3181 if Is_Warning_Msg
then
3182 Set_Msg_Str
("will be raised at run time");
3184 Set_Msg_Str
("would have been raised at run time");
3187 -- ']' (may be/might have been raised at run time)
3190 if Is_Warning_Msg
then
3191 Set_Msg_Str
("may be raised at run time");
3193 Set_Msg_Str
("might have been raised at run time");
3196 -- Normal character with no special treatment
3208 procedure Set_Posted
(N
: Node_Id
) is
3212 if Is_Serious_Error
then
3214 -- We always set Error_Posted on the node itself
3216 Set_Error_Posted
(N
);
3218 -- If it is a subexpression, then set Error_Posted on parents up to
3219 -- and including the first non-subexpression construct. This helps
3220 -- avoid cascaded error messages within a single expression.
3226 Set_Error_Posted
(P
);
3227 exit when Nkind
(P
) not in N_Subexpr
;
3230 if Nkind_In
(P
, N_Pragma_Argument_Association
,
3231 N_Component_Association
,
3232 N_Discriminant_Association
,
3233 N_Generic_Association
,
3234 N_Parameter_Association
)
3236 Set_Error_Posted
(Parent
(P
));
3239 -- A special check, if we just posted an error on an attribute
3240 -- definition clause, then also set the entity involved as posted.
3241 -- For example, this stops complaining about the alignment after
3242 -- complaining about the size, which is likely to be useless.
3244 if Nkind
(P
) = N_Attribute_Definition_Clause
then
3245 if Is_Entity_Name
(Name
(P
)) then
3246 Set_Error_Posted
(Entity
(Name
(P
)));
3252 -----------------------
3253 -- Set_Qualification --
3254 -----------------------
3256 procedure Set_Qualification
(N
: Nat
; E
: Entity_Id
) is
3258 if N
/= 0 and then Scope
(E
) /= Standard_Standard
then
3259 Set_Qualification
(N
- 1, Scope
(E
));
3260 Set_Msg_Node
(Scope
(E
));
3263 end Set_Qualification
;
3265 ------------------------
3266 -- Special_Msg_Delete --
3267 ------------------------
3269 -- Is it really right to have all this specialized knowledge in errout?
3271 function Special_Msg_Delete
3273 N
: Node_Or_Entity_Id
;
3274 E
: Node_Or_Entity_Id
) return Boolean
3277 -- Never delete messages in -gnatdO mode
3279 if Debug_Flag_OO
then
3282 -- Processing for "Size too small" messages
3284 elsif Is_Size_Too_Small_Message
(Msg
) then
3286 -- Suppress "size too small" errors in CodePeer mode, since code may
3287 -- be analyzed in a different configuration than the one used for
3288 -- compilation. Even when the configurations match, this message
3289 -- may be issued on correct code, because pragma Pack is ignored
3290 -- in CodePeer mode.
3292 if CodePeer_Mode
then
3295 -- When a size is wrong for a frozen type there is no explicit size
3296 -- clause, and other errors have occurred, suppress the message,
3297 -- since it is likely that this size error is a cascaded result of
3298 -- other errors. The reason we eliminate unfrozen types is that
3299 -- messages issued before the freeze type are for sure OK.
3302 and then Serious_Errors_Detected
> 0
3303 and then Nkind
(N
) /= N_Component_Clause
3304 and then Nkind
(Parent
(N
)) /= N_Component_Clause
3306 No
(Get_Attribute_Definition_Clause
(E
, Attribute_Size
))
3308 No
(Get_Attribute_Definition_Clause
(E
, Attribute_Object_Size
))
3310 No
(Get_Attribute_Definition_Clause
(E
, Attribute_Value_Size
))
3316 -- All special tests complete, so go ahead with message
3319 end Special_Msg_Delete
;
3325 procedure SPARK_Msg_N
(Msg
: String; N
: Node_Or_Entity_Id
) is
3327 if SPARK_Mode
/= Off
then
3328 Error_Msg_N
(Msg
, N
);
3336 procedure SPARK_Msg_NE
3338 N
: Node_Or_Entity_Id
;
3339 E
: Node_Or_Entity_Id
)
3342 if SPARK_Mode
/= Off
then
3343 Error_Msg_NE
(Msg
, N
, E
);
3347 --------------------------
3348 -- Unwind_Internal_Type --
3349 --------------------------
3351 procedure Unwind_Internal_Type
(Ent
: in out Entity_Id
) is
3352 Derived
: Boolean := False;
3354 Old_Ent
: Entity_Id
;
3357 -- Undo placement of a quote, since we will put it back later
3359 Mchar
:= Msg_Buffer
(Msglen
);
3362 Msglen
:= Msglen
- 1;
3365 -- The loop here deals with recursive types, we are trying to find a
3366 -- related entity that is not an implicit type. Note that the check with
3367 -- Old_Ent stops us from getting "stuck". Also, we don't output the
3368 -- "type derived from" message more than once in the case where we climb
3369 -- up multiple levels.
3374 -- Implicit access type, use directly designated type In Ada 2005,
3375 -- the designated type may be an anonymous access to subprogram, in
3376 -- which case we can only point to its definition.
3378 if Is_Access_Type
(Ent
) then
3379 if Ekind
(Ent
) = E_Access_Subprogram_Type
3380 or else Ekind
(Ent
) = E_Anonymous_Access_Subprogram_Type
3381 or else Is_Access_Protected_Subprogram_Type
(Ent
)
3383 Ent
:= Directly_Designated_Type
(Ent
);
3385 if not Comes_From_Source
(Ent
) then
3386 if Buffer_Ends_With
("type ") then
3387 Buffer_Remove
("type ");
3391 if Ekind
(Ent
) = E_Function
then
3392 Set_Msg_Str
("access to function ");
3393 elsif Ekind
(Ent
) = E_Procedure
then
3394 Set_Msg_Str
("access to procedure ");
3396 Set_Msg_Str
("access to subprogram");
3401 -- Type is access to object, named or anonymous
3404 Set_Msg_Str
("access to ");
3405 Ent
:= Directly_Designated_Type
(Ent
);
3410 elsif Is_Class_Wide_Type
(Ent
) then
3412 Ent
:= Root_Type
(Ent
);
3414 -- Use base type if this is a subtype
3416 elsif Ent
/= Base_Type
(Ent
) then
3417 Buffer_Remove
("type ");
3419 -- Avoid duplication "subtype of subtype of", and also replace
3420 -- "derived from subtype of" simply by "derived from"
3422 if not Buffer_Ends_With
("subtype of ")
3423 and then not Buffer_Ends_With
("derived from ")
3425 Set_Msg_Str
("subtype of ");
3428 Ent
:= Base_Type
(Ent
);
3430 -- If this is a base type with a first named subtype, use the first
3431 -- named subtype instead. This is not quite accurate in all cases,
3432 -- but it makes too much noise to be accurate and add 'Base in all
3433 -- cases. Note that we only do this is the first named subtype is not
3434 -- itself an internal name. This avoids the obvious loop (subtype ->
3435 -- basetype -> subtype) which would otherwise occur).
3439 FST
: constant Entity_Id
:= First_Subtype
(Ent
);
3442 if not Is_Internal_Name
(Chars
(FST
)) then
3446 -- Otherwise use root type
3450 Buffer_Remove
("type ");
3452 -- Test for "subtype of type derived from" which seems
3453 -- excessive and is replaced by "type derived from".
3455 Buffer_Remove
("subtype of");
3457 -- Avoid duplicated "type derived from type derived from"
3459 if not Buffer_Ends_With
("type derived from ") then
3460 Set_Msg_Str
("type derived from ");
3471 -- If we are stuck in a loop, get out and settle for the internal
3472 -- name after all. In this case we set to kill the message if it is
3473 -- not the first error message (we really try hard not to show the
3474 -- dirty laundry of the implementation to the poor user).
3476 if Ent
= Old_Ent
then
3477 Kill_Message
:= True;
3481 -- Get out if we finally found a non-internal name to use
3483 exit Find
when not Is_Internal_Name
(Chars
(Ent
));
3489 end Unwind_Internal_Type
;
3491 --------------------
3492 -- Warn_Insertion --
3493 --------------------
3495 function Warn_Insertion
return String is
3497 case Warning_Msg_Char
is
3501 when 'a' .. 'z' |
'A' .. 'Z' |
'*' |
'$' =>
3502 return '?' & Warning_Msg_Char
& '?';
3508 raise Program_Error
;