1 ------------------------------------------------------------------------------
3 -- GNAT COMPILER COMPONENTS --
9 -- Copyright (C) 1992-2008, 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 -- Generally the parser checks the basic syntax of pragmas, but does not
27 -- do specialized syntax checks for individual pragmas, these are deferred
28 -- to semantic analysis time (see unit Sem_Prag). There are some pragmas
29 -- which require recognition and either partial or complete processing
30 -- during parsing, and this unit performs this required processing.
32 with Fname
.UF
; use Fname
.UF
;
33 with Osint
; use Osint
;
34 with Rident
; use Rident
;
35 with Restrict
; use Restrict
;
36 with Stringt
; use Stringt
;
37 with Stylesw
; use Stylesw
;
38 with Uintp
; use Uintp
;
39 with Uname
; use Uname
;
41 with System
.WCh_Con
; use System
.WCh_Con
;
45 function Prag
(Pragma_Node
: Node_Id
; Semi
: Source_Ptr
) return Node_Id
is
46 Prag_Name
: constant Name_Id
:= Pragma_Name
(Pragma_Node
);
47 Prag_Id
: constant Pragma_Id
:= Get_Pragma_Id
(Prag_Name
);
48 Pragma_Sloc
: constant Source_Ptr
:= Sloc
(Pragma_Node
);
52 -----------------------
53 -- Local Subprograms --
54 -----------------------
56 function Arg1
return Node_Id
;
57 function Arg2
return Node_Id
;
58 function Arg3
return Node_Id
;
59 -- Obtain specified Pragma_Argument_Association. It is allowable to call
60 -- the routine for the argument one past the last present argument, but
61 -- that is the only case in which a non-present argument can be referenced.
63 procedure Check_Arg_Count
(Required
: Int
);
64 -- Check argument count for pragma = Required.
65 -- If not give error and raise Error_Resync.
67 procedure Check_Arg_Is_String_Literal
(Arg
: Node_Id
);
68 -- Check the expression of the specified argument to make sure that it
69 -- is a string literal. If not give error and raise Error_Resync.
71 procedure Check_Arg_Is_On_Or_Off
(Arg
: Node_Id
);
72 -- Check the expression of the specified argument to make sure that it
73 -- is an identifier which is either ON or OFF, and if not, then issue
74 -- an error message and raise Error_Resync.
76 procedure Check_No_Identifier
(Arg
: Node_Id
);
77 -- Checks that the given argument does not have an identifier. If
78 -- an identifier is present, then an error message is issued, and
79 -- Error_Resync is raised.
81 procedure Check_Optional_Identifier
(Arg
: Node_Id
; Id
: Name_Id
);
82 -- Checks if the given argument has an identifier, and if so, requires
83 -- it to match the given identifier name. If there is a non-matching
84 -- identifier, then an error message is given and Error_Resync raised.
86 procedure Check_Required_Identifier
(Arg
: Node_Id
; Id
: Name_Id
);
87 -- Same as Check_Optional_Identifier, except that the name is required
88 -- to be present and to match the given Id value.
90 procedure Process_Restrictions_Or_Restriction_Warnings
;
91 -- Common processing for Restrictions and Restriction_Warnings pragmas.
92 -- This routine only processes the case of No_Obsolescent_Features,
93 -- which is the only restriction that has syntactic effects. No general
94 -- error checking is done, since this will be done in Sem_Prag. The
95 -- other case processed is pragma Restrictions No_Dependence, since
96 -- otherwise this is done too late.
102 function Arg1
return Node_Id
is
104 return First
(Pragma_Argument_Associations
(Pragma_Node
));
111 function Arg2
return Node_Id
is
120 function Arg3
return Node_Id
is
125 ---------------------
126 -- Check_Arg_Count --
127 ---------------------
129 procedure Check_Arg_Count
(Required
: Int
) is
131 if Arg_Count
/= Required
then
132 Error_Msg
("wrong number of arguments for pragma%", Pragma_Sloc
);
137 ----------------------------
138 -- Check_Arg_Is_On_Or_Off --
139 ----------------------------
141 procedure Check_Arg_Is_On_Or_Off
(Arg
: Node_Id
) is
142 Argx
: constant Node_Id
:= Expression
(Arg
);
145 if Nkind
(Expression
(Arg
)) /= N_Identifier
146 or else (Chars
(Argx
) /= Name_On
148 Chars
(Argx
) /= Name_Off
)
150 Error_Msg_Name_2
:= Name_On
;
151 Error_Msg_Name_3
:= Name_Off
;
154 ("argument for pragma% must be% or%", Sloc
(Argx
));
157 end Check_Arg_Is_On_Or_Off
;
159 ---------------------------------
160 -- Check_Arg_Is_String_Literal --
161 ---------------------------------
163 procedure Check_Arg_Is_String_Literal
(Arg
: Node_Id
) is
165 if Nkind
(Expression
(Arg
)) /= N_String_Literal
then
167 ("argument for pragma% must be string literal",
168 Sloc
(Expression
(Arg
)));
171 end Check_Arg_Is_String_Literal
;
173 -------------------------
174 -- Check_No_Identifier --
175 -------------------------
177 procedure Check_No_Identifier
(Arg
: Node_Id
) is
179 if Chars
(Arg
) /= No_Name
then
180 Error_Msg_N
("pragma% does not permit named arguments", Arg
);
183 end Check_No_Identifier
;
185 -------------------------------
186 -- Check_Optional_Identifier --
187 -------------------------------
189 procedure Check_Optional_Identifier
(Arg
: Node_Id
; Id
: Name_Id
) is
191 if Present
(Arg
) and then Chars
(Arg
) /= No_Name
then
192 if Chars
(Arg
) /= Id
then
193 Error_Msg_Name_2
:= Id
;
194 Error_Msg_N
("pragma% argument expects identifier%", Arg
);
197 end Check_Optional_Identifier
;
199 -------------------------------
200 -- Check_Required_Identifier --
201 -------------------------------
203 procedure Check_Required_Identifier
(Arg
: Node_Id
; Id
: Name_Id
) is
205 if Chars
(Arg
) /= Id
then
206 Error_Msg_Name_2
:= Id
;
207 Error_Msg_N
("pragma% argument must have identifier%", Arg
);
209 end Check_Required_Identifier
;
211 --------------------------------------------------
212 -- Process_Restrictions_Or_Restriction_Warnings --
213 --------------------------------------------------
215 procedure Process_Restrictions_Or_Restriction_Warnings
is
222 while Present
(Arg
) loop
224 Expr
:= Expression
(Arg
);
227 and then Nkind
(Expr
) = N_Identifier
228 and then Get_Restriction_Id
(Chars
(Expr
)) = No_Obsolescent_Features
230 Set_Restriction
(No_Obsolescent_Features
, Pragma_Node
);
231 Restriction_Warnings
(No_Obsolescent_Features
) :=
232 Prag_Id
= Pragma_Restriction_Warnings
;
234 elsif Id
= Name_No_Dependence
then
235 Set_Restriction_No_Dependence
237 Warn
=> Prag_Id
= Pragma_Restriction_Warnings
238 or else Treat_Restrictions_As_Warnings
);
243 end Process_Restrictions_Or_Restriction_Warnings
;
245 -- Start of processing for Prag
248 Error_Msg_Name_1
:= Prag_Name
;
250 -- Ignore unrecognized pragma. We let Sem post the warning for this, since
251 -- it is a semantic error, not a syntactic one (we have already checked
252 -- the syntax for the unrecognized pragma as required by (RM 2.8(11)).
254 if Prag_Id
= Unknown_Pragma
then
258 -- Count number of arguments. This loop also checks if any of the arguments
259 -- are Error, indicating a syntax error as they were parsed. If so, we
260 -- simply return, because we get into trouble with cascaded errors if we
261 -- try to perform our error checks on junk arguments.
265 if Present
(Pragma_Argument_Associations
(Pragma_Node
)) then
268 while Arg_Node
/= Empty
loop
269 Arg_Count
:= Arg_Count
+ 1;
271 if Expression
(Arg_Node
) = Error
then
279 -- Remaining processing is pragma dependent
287 -- This pragma must be processed at parse time, since we want to set
288 -- the Ada version properly at parse time to recognize the appropriate
289 -- Ada version syntax.
291 when Pragma_Ada_83
=>
292 Ada_Version
:= Ada_83
;
293 Ada_Version_Explicit
:= Ada_Version
;
299 -- This pragma must be processed at parse time, since we want to set
300 -- the Ada version properly at parse time to recognize the appropriate
301 -- Ada version syntax.
303 when Pragma_Ada_95
=>
304 Ada_Version
:= Ada_95
;
305 Ada_Version_Explicit
:= Ada_Version
;
307 ---------------------
308 -- Ada_05/Ada_2005 --
309 ---------------------
311 -- This pragma must be processed at parse time, since we want to set
312 -- the Ada version properly at parse time to recognize the appropriate
313 -- Ada version syntax. However, it is only the zero argument form that
314 -- must be processed at parse time.
316 when Pragma_Ada_05 | Pragma_Ada_2005
=>
317 if Arg_Count
= 0 then
318 Ada_Version
:= Ada_05
;
319 Ada_Version_Explicit
:= Ada_05
;
326 -- pragma Debug (PROCEDURE_CALL_STATEMENT);
328 -- This has to be processed by the parser because of the very peculiar
329 -- form of the second parameter, which is syntactically from a formal
330 -- point of view a function call (since it must be an expression), but
331 -- semantically we treat it as a procedure call (which has exactly the
332 -- same syntactic form, so that's why we can get away with this!)
334 when Pragma_Debug
=> Debug
: declare
338 if Arg_Count
= 2 then
339 Check_No_Identifier
(Arg1
);
340 Check_No_Identifier
(Arg2
);
341 Expr
:= New_Copy
(Expression
(Arg2
));
345 Check_No_Identifier
(Arg1
);
346 Expr
:= New_Copy
(Expression
(Arg1
));
349 if Nkind
(Expr
) /= N_Indexed_Component
350 and then Nkind
(Expr
) /= N_Function_Call
351 and then Nkind
(Expr
) /= N_Identifier
352 and then Nkind
(Expr
) /= N_Selected_Component
355 ("argument of pragma% is not procedure call", Sloc
(Expr
));
359 (Pragma_Node
, P_Statement_Name
(Expr
));
363 -------------------------------
364 -- Extensions_Allowed (GNAT) --
365 -------------------------------
367 -- pragma Extensions_Allowed (Off | On)
369 -- The processing for pragma Extensions_Allowed must be done at
370 -- parse time, since extensions mode may affect what is accepted.
372 when Pragma_Extensions_Allowed
=>
374 Check_No_Identifier
(Arg1
);
375 Check_Arg_Is_On_Or_Off
(Arg1
);
377 if Chars
(Expression
(Arg1
)) = Name_On
then
378 Extensions_Allowed
:= True;
380 Extensions_Allowed
:= False;
387 -- pragma List (Off | On)
389 -- The processing for pragma List must be done at parse time,
390 -- since a listing can be generated in parse only mode.
394 Check_No_Identifier
(Arg1
);
395 Check_Arg_Is_On_Or_Off
(Arg1
);
397 -- We unconditionally make a List_On entry for the pragma, so that
398 -- in the List (Off) case, the pragma will print even in a region
399 -- of code with listing turned off (this is required!)
401 List_Pragmas
.Increment_Last
;
402 List_Pragmas
.Table
(List_Pragmas
.Last
) :=
403 (Ptyp
=> List_On
, Ploc
=> Sloc
(Pragma_Node
));
405 -- Now generate the list off entry for pragma List (Off)
407 if Chars
(Expression
(Arg1
)) = Name_Off
then
408 List_Pragmas
.Increment_Last
;
409 List_Pragmas
.Table
(List_Pragmas
.Last
) :=
410 (Ptyp
=> List_Off
, Ploc
=> Semi
);
419 -- Processing for this pragma must be done at parse time, since a
420 -- listing can be generated in parse only mode with semantics off.
424 List_Pragmas
.Increment_Last
;
425 List_Pragmas
.Table
(List_Pragmas
.Last
) := (Page
, Semi
);
431 -- pragma Restrictions (RESTRICTION {, RESTRICTION});
434 -- restriction_IDENTIFIER
435 -- | restriction_parameter_IDENTIFIER => EXPRESSION
437 -- We process the case of No_Obsolescent_Features, since this has
438 -- a syntactic effect that we need to detect at parse time (the use
439 -- of replacement characters such as colon for pound sign).
441 when Pragma_Restrictions
=>
442 Process_Restrictions_Or_Restriction_Warnings
;
444 --------------------------
445 -- Restriction_Warnings --
446 --------------------------
448 -- pragma Restriction_Warnings (RESTRICTION {, RESTRICTION});
451 -- restriction_IDENTIFIER
452 -- | restriction_parameter_IDENTIFIER => EXPRESSION
454 -- See above comment for pragma Restrictions
456 when Pragma_Restriction_Warnings
=>
457 Process_Restrictions_Or_Restriction_Warnings
;
459 ----------------------------------------------------------
460 -- Source_File_Name and Source_File_Name_Project (GNAT) --
461 ----------------------------------------------------------
463 -- These two pragmas have the same syntax and semantics.
464 -- There are five forms of these pragmas:
466 -- pragma Source_File_Name[_Project] (
467 -- [UNIT_NAME =>] unit_NAME,
468 -- BODY_FILE_NAME => STRING_LITERAL
469 -- [, [INDEX =>] INTEGER_LITERAL]);
471 -- pragma Source_File_Name[_Project] (
472 -- [UNIT_NAME =>] unit_NAME,
473 -- SPEC_FILE_NAME => STRING_LITERAL
474 -- [, [INDEX =>] INTEGER_LITERAL]);
476 -- pragma Source_File_Name[_Project] (
477 -- BODY_FILE_NAME => STRING_LITERAL
478 -- [, DOT_REPLACEMENT => STRING_LITERAL]
479 -- [, CASING => CASING_SPEC]);
481 -- pragma Source_File_Name[_Project] (
482 -- SPEC_FILE_NAME => STRING_LITERAL
483 -- [, DOT_REPLACEMENT => STRING_LITERAL]
484 -- [, CASING => CASING_SPEC]);
486 -- pragma Source_File_Name[_Project] (
487 -- SUBUNIT_FILE_NAME => STRING_LITERAL
488 -- [, DOT_REPLACEMENT => STRING_LITERAL]
489 -- [, CASING => CASING_SPEC]);
491 -- CASING_SPEC ::= Uppercase | Lowercase | Mixedcase
493 -- Pragma Source_File_Name_Project (SFNP) is equivalent to pragma
494 -- Source_File_Name (SFN), however their usage is exclusive:
495 -- SFN can only be used when no project file is used, while
496 -- SFNP can only be used when a project file is used.
498 -- The Project Manager produces a configuration pragmas file that
499 -- is communicated to the compiler with -gnatec switch. This file
500 -- contains only SFNP pragmas (at least two for the default naming
501 -- scheme. As this configuration pragmas file is always the first
502 -- processed by the compiler, it prevents the use of pragmas SFN in
503 -- other config files when a project file is in use.
505 -- Note: we process this during parsing, since we need to have the
506 -- source file names set well before the semantic analysis starts,
507 -- since we load the spec and with'ed packages before analysis.
509 when Pragma_Source_File_Name | Pragma_Source_File_Name_Project
=>
510 Source_File_Name
: declare
511 Unam
: Unit_Name_Type
;
521 function Get_Fname
(Arg
: Node_Id
) return File_Name_Type
;
522 -- Process file name from unit name form of pragma
524 function Get_String_Argument
(Arg
: Node_Id
) return String_Ptr
;
525 -- Process string literal value from argument
527 procedure Process_Casing
(Arg
: Node_Id
);
528 -- Process Casing argument of pattern form of pragma
530 procedure Process_Dot_Replacement
(Arg
: Node_Id
);
531 -- Process Dot_Replacement argument of pattern form of pragma
537 function Get_Fname
(Arg
: Node_Id
) return File_Name_Type
is
539 String_To_Name_Buffer
(Strval
(Expression
(Arg
)));
541 for J
in 1 .. Name_Len
loop
542 if Is_Directory_Separator
(Name_Buffer
(J
)) then
544 ("directory separator character not allowed",
545 Sloc
(Expression
(Arg
)) + Source_Ptr
(J
));
552 -------------------------
553 -- Get_String_Argument --
554 -------------------------
556 function Get_String_Argument
(Arg
: Node_Id
) return String_Ptr
is
560 if Nkind
(Expression
(Arg
)) /= N_String_Literal
562 Nkind
(Expression
(Arg
)) /= N_Operator_Symbol
565 ("argument for pragma% must be string literal", Arg
);
569 Str
:= Strval
(Expression
(Arg
));
571 -- Check string has no wide chars
573 for J
in 1 .. String_Length
(Str
) loop
574 if Get_String_Char
(Str
, J
) > 255 then
576 ("wide character not allowed in pattern for pragma%",
577 Sloc
(Expression
(Arg2
)) + Text_Ptr
(J
) - 1);
583 String_To_Name_Buffer
(Str
);
584 return new String'(Name_Buffer (1 .. Name_Len));
585 end Get_String_Argument;
591 procedure Process_Casing (Arg : Node_Id) is
592 Expr : constant Node_Id := Expression (Arg);
595 Check_Required_Identifier (Arg, Name_Casing);
597 if Nkind (Expr) = N_Identifier then
598 if Chars (Expr) = Name_Lowercase then
599 Cas := All_Lower_Case;
601 elsif Chars (Expr) = Name_Uppercase then
602 Cas := All_Upper_Case;
604 elsif Chars (Expr) = Name_Mixedcase then
611 ("Casing argument for pragma% must be " &
612 "one of Mixedcase, Lowercase, Uppercase",
616 -----------------------------
617 -- Process_Dot_Replacement --
618 -----------------------------
620 procedure Process_Dot_Replacement (Arg : Node_Id) is
622 Check_Required_Identifier (Arg, Name_Dot_Replacement);
623 Dot := Get_String_Argument (Arg);
624 end Process_Dot_Replacement;
626 -- Start of processing for Source_File_Name and
627 -- Source_File_Name_Project pragmas.
630 if Prag_Id = Pragma_Source_File_Name then
631 if Project_File_In_Use = In_Use then
633 ("pragma Source_File_Name cannot be used " &
634 "with a project file", Pragma_Sloc);
637 Project_File_In_Use := Not_In_Use;
641 if Project_File_In_Use = Not_In_Use then
643 ("pragma Source_File_Name_Project should only be used " &
644 "with a project file", Pragma_Sloc);
646 Project_File_In_Use := In_Use;
650 -- We permit from 1 to 3 arguments
652 if Arg_Count not in 1 .. 3 then
656 Expr1 := Expression (Arg1);
658 -- If first argument is identifier or selected component, then
659 -- we have the specific file case of the Source_File_Name pragma,
660 -- and the first argument is a unit name.
662 if Nkind (Expr1) = N_Identifier
664 (Nkind (Expr1) = N_Selected_Component
666 Nkind (Selector_Name (Expr1)) = N_Identifier)
668 if Nkind (Expr1) = N_Identifier
669 and then Chars (Expr1) = Name_System
672 ("pragma Source_File_Name may not be used for System",
677 -- Process index argument if present
679 if Arg_Count = 3 then
680 Expr := Expression (Arg3);
682 if Nkind (Expr) /= N_Integer_Literal
683 or else not UI_Is_In_Int_Range (Intval (Expr))
684 or else Intval (Expr) > 999
685 or else Intval (Expr) <= 0
688 ("pragma% index must be integer literal" &
689 " in range 1 .. 999", Sloc (Expr));
692 Index := UI_To_Int (Intval (Expr));
695 -- No index argument present
702 Check_Optional_Identifier (Arg1, Name_Unit_Name);
703 Unam := Get_Unit_Name (Expr1);
705 Check_Arg_Is_String_Literal (Arg2);
707 if Chars (Arg2) = Name_Spec_File_Name then
709 (Get_Spec_Name (Unam), Get_Fname (Arg2), Index);
711 elsif Chars (Arg2) = Name_Body_File_Name then
713 (Unam, Get_Fname (Arg2), Index);
717 ("pragma% argument has incorrect identifier", Arg2);
721 -- If the first argument is not an identifier, then we must have
722 -- the pattern form of the pragma, and the first argument must be
723 -- the pattern string with an appropriate name.
726 if Chars (Arg1) = Name_Spec_File_Name then
729 elsif Chars (Arg1) = Name_Body_File_Name then
732 elsif Chars (Arg1) = Name_Subunit_File_Name then
735 elsif Chars (Arg1) = Name_Unit_Name then
737 ("Unit_Name parameter for pragma% must be an identifier",
743 ("pragma% argument has incorrect identifier", Arg1);
747 Pat := Get_String_Argument (Arg1);
749 -- Check pattern has exactly one asterisk
752 for J in Pat'Range loop
753 if Pat (J) = '*' then
760 ("file name pattern must have exactly one * character",
765 -- Set defaults for Casing and Dot_Separator parameters
767 Cas := All_Lower_Case;
768 Dot := new String'(".");
770 -- Process second and third arguments if present
772 if Arg_Count
> 1 then
773 if Chars
(Arg2
) = Name_Casing
then
774 Process_Casing
(Arg2
);
776 if Arg_Count
= 3 then
777 Process_Dot_Replacement
(Arg3
);
781 Process_Dot_Replacement
(Arg2
);
783 if Arg_Count
= 3 then
784 Process_Casing
(Arg3
);
789 Set_File_Name_Pattern
(Pat
, Typ
, Dot
, Cas
);
791 end Source_File_Name
;
793 -----------------------------
794 -- Source_Reference (GNAT) --
795 -----------------------------
797 -- pragma Source_Reference
798 -- (INTEGER_LITERAL [, STRING_LITERAL] );
800 -- Processing for this pragma must be done at parse time, since error
801 -- messages needing the proper line numbers can be generated in parse
802 -- only mode with semantic checking turned off, and indeed we usually
803 -- turn off semantic checking anyway if any parse errors are found.
805 when Pragma_Source_Reference
=> Source_Reference
: declare
806 Fname
: File_Name_Type
;
809 if Arg_Count
/= 1 then
811 Check_No_Identifier
(Arg2
);
814 -- Check that this is first line of file. We skip this test if
815 -- we are in syntax check only mode, since we may be dealing with
816 -- multiple compilation units.
818 if Get_Physical_Line_Number
(Pragma_Sloc
) /= 1
819 and then Num_SRef_Pragmas
(Current_Source_File
) = 0
820 and then Operating_Mode
/= Check_Syntax
823 ("first % pragma must be first line of file", Pragma_Sloc
);
827 Check_No_Identifier
(Arg1
);
829 if Arg_Count
= 1 then
830 if Num_SRef_Pragmas
(Current_Source_File
) = 0 then
832 ("file name required for first % pragma in file",
842 Check_Arg_Is_String_Literal
(Arg2
);
843 String_To_Name_Buffer
(Strval
(Expression
(Arg2
)));
846 if Num_SRef_Pragmas
(Current_Source_File
) > 0 then
847 if Fname
/= Full_Ref_Name
(Current_Source_File
) then
849 ("file name must be same in all % pragmas", Pragma_Sloc
);
855 if Nkind
(Expression
(Arg1
)) /= N_Integer_Literal
then
857 ("argument for pragma% must be integer literal",
858 Sloc
(Expression
(Arg1
)));
861 -- OK, this source reference pragma is effective, however, we
862 -- ignore it if it is not in the first unit in the multiple unit
863 -- case. This is because the only purpose in this case is to
864 -- provide source pragmas for subsequent use by gnatchop.
867 if Num_Library_Units
= 1 then
868 Register_Source_Ref_Pragma
870 Strip_Directory
(Fname
),
871 UI_To_Int
(Intval
(Expression
(Arg1
))),
872 Get_Physical_Line_Number
(Pragma_Sloc
) + 1);
875 end Source_Reference
;
877 -------------------------
878 -- Style_Checks (GNAT) --
879 -------------------------
881 -- pragma Style_Checks (On | Off | ALL_CHECKS | STRING_LITERAL);
883 -- This is processed by the parser since some of the style
884 -- checks take place during source scanning and parsing.
886 when Pragma_Style_Checks
=> Style_Checks
: declare
890 OK
: Boolean := True;
893 -- Two argument case is only for semantics
895 if Arg_Count
= 2 then
900 Check_No_Identifier
(Arg1
);
901 A
:= Expression
(Arg1
);
903 if Nkind
(A
) = N_String_Literal
then
907 Slen
: constant Natural := Natural (String_Length
(S
));
908 Options
: String (1 .. Slen
);
915 C
:= Get_String_Char
(S
, Int
(J
));
917 if not In_Character_Range
(C
) then
923 Options
(J
) := Get_Character
(C
);
927 Set_Style_Check_Options
(Options
, OK
, Ptr
);
937 (Style_Msg_Buf
(1 .. Style_Msg_Len
),
938 Sloc
(Expression
(Arg1
)) + Source_Ptr
(Ptr
));
943 elsif Nkind
(A
) /= N_Identifier
then
946 elsif Chars
(A
) = Name_All_Checks
then
947 Stylesw
.Set_Default_Style_Check_Options
;
949 elsif Chars
(A
) = Name_On
then
952 elsif Chars
(A
) = Name_Off
then
953 Style_Check
:= False;
960 Error_Msg
("incorrect argument for pragma%", Sloc
(A
));
966 ---------------------
967 -- Warnings (GNAT) --
968 ---------------------
970 -- pragma Warnings (On | Off);
971 -- pragma Warnings (On | Off, LOCAL_NAME);
972 -- pragma Warnings (static_string_EXPRESSION);
973 -- pragma Warnings (On | Off, static_string_EXPRESSION);
975 -- The one argument ON/OFF case is processed by the parser, since it may
976 -- control parser warnings as well as semantic warnings, and in any case
977 -- we want to be absolutely sure that the range in the warnings table is
978 -- set well before any semantic analysis is performed.
980 when Pragma_Warnings
=>
981 if Arg_Count
= 1 then
982 Check_No_Identifier
(Arg1
);
985 Argx
: constant Node_Id
:= Expression
(Arg1
);
987 if Nkind
(Argx
) = N_Identifier
then
988 if Chars
(Argx
) = Name_On
then
989 Set_Warnings_Mode_On
(Pragma_Sloc
);
990 elsif Chars
(Argx
) = Name_Off
then
991 Set_Warnings_Mode_Off
(Pragma_Sloc
);
997 -----------------------------
998 -- Wide_Character_Encoding --
999 -----------------------------
1001 -- pragma Wide_Character_Encoding (IDENTIFIER | CHARACTER_LITERAL);
1003 -- This is processed by the parser, since the scanner is affected
1005 when Pragma_Wide_Character_Encoding
=> Wide_Character_Encoding
: declare
1009 Check_Arg_Count
(1);
1010 Check_No_Identifier
(Arg1
);
1011 A
:= Expression
(Arg1
);
1013 if Nkind
(A
) = N_Identifier
then
1014 Get_Name_String
(Chars
(A
));
1015 Wide_Character_Encoding_Method
:=
1016 Get_WC_Encoding_Method
(Name_Buffer
(1 .. Name_Len
));
1018 elsif Nkind
(A
) = N_Character_Literal
then
1020 R
: constant Char_Code
:=
1021 Char_Code
(UI_To_Int
(Char_Literal_Value
(A
)));
1023 if In_Character_Range
(R
) then
1024 Wide_Character_Encoding_Method
:=
1025 Get_WC_Encoding_Method
(Get_Character
(R
));
1027 raise Constraint_Error
;
1032 raise Constraint_Error
;
1036 when Constraint_Error
=>
1037 Error_Msg_N
("invalid argument for pragma%", Arg1
);
1038 end Wide_Character_Encoding
;
1040 -----------------------
1041 -- All Other Pragmas --
1042 -----------------------
1044 -- For all other pragmas, checking and processing is handled
1045 -- entirely in Sem_Prag, and no further checking is done by Par.
1047 when Pragma_Abort_Defer |
1048 Pragma_Assertion_Policy |
1050 Pragma_All_Calls_Remote |
1053 Pragma_Asynchronous |
1055 Pragma_Atomic_Components |
1056 Pragma_Attach_Handler |
1059 Pragma_Check_Policy |
1060 Pragma_CIL_Constructor |
1061 Pragma_Compile_Time_Error |
1062 Pragma_Compile_Time_Warning |
1063 Pragma_Compiler_Unit |
1064 Pragma_Convention_Identifier |
1066 Pragma_CPP_Constructor |
1067 Pragma_CPP_Virtual |
1069 Pragma_C_Pass_By_Copy |
1071 Pragma_Common_Object |
1072 Pragma_Complete_Representation |
1073 Pragma_Complex_Representation |
1074 Pragma_Component_Alignment |
1077 Pragma_Debug_Policy |
1078 Pragma_Detect_Blocking |
1079 Pragma_Discard_Names |
1082 Pragma_Elaborate_All |
1083 Pragma_Elaborate_Body |
1084 Pragma_Elaboration_Checks |
1086 Pragma_Export_Exception |
1087 Pragma_Export_Function |
1088 Pragma_Export_Object |
1089 Pragma_Export_Procedure |
1090 Pragma_Export_Value |
1091 Pragma_Export_Valued_Procedure |
1092 Pragma_Extend_System |
1094 Pragma_External_Name_Casing |
1095 Pragma_Favor_Top_Level |
1097 Pragma_Finalize_Storage_Only |
1098 Pragma_Float_Representation |
1100 Pragma_Implemented_By_Entry |
1101 Pragma_Implicit_Packing |
1103 Pragma_Import_Exception |
1104 Pragma_Import_Function |
1105 Pragma_Import_Object |
1106 Pragma_Import_Procedure |
1107 Pragma_Import_Valued_Procedure |
1108 Pragma_Initialize_Scalars |
1110 Pragma_Inline_Always |
1111 Pragma_Inline_Generic |
1112 Pragma_Inspection_Point |
1114 Pragma_Interface_Name |
1115 Pragma_Interrupt_Handler |
1116 Pragma_Interrupt_State |
1117 Pragma_Interrupt_Priority |
1118 Pragma_Java_Constructor |
1119 Pragma_Java_Interface |
1123 Pragma_Linker_Alias |
1124 Pragma_Linker_Constructor |
1125 Pragma_Linker_Destructor |
1126 Pragma_Linker_Options |
1127 Pragma_Linker_Section |
1128 Pragma_Locking_Policy |
1130 Pragma_Machine_Attribute |
1132 Pragma_Main_Storage |
1133 Pragma_Memory_Size |
1136 Pragma_Obsolescent |
1137 Pragma_No_Run_Time |
1138 Pragma_No_Strict_Aliasing |
1139 Pragma_Normalize_Scalars |
1141 Pragma_Optimize_Alignment |
1144 Pragma_Preelaborable_Initialization |
1146 Pragma_Persistent_BSS |
1147 Pragma_Postcondition |
1148 Pragma_Precondition |
1149 Pragma_Preelaborate |
1150 Pragma_Preelaborate_05 |
1152 Pragma_Priority_Specific_Dispatching |
1154 Pragma_Profile_Warnings |
1155 Pragma_Propagate_Exceptions |
1156 Pragma_Psect_Object |
1159 Pragma_Pure_Function |
1160 Pragma_Queuing_Policy |
1161 Pragma_Relative_Deadline |
1162 Pragma_Remote_Call_Interface |
1163 Pragma_Remote_Types |
1164 Pragma_Restricted_Run_Time |
1167 Pragma_Share_Generic |
1169 Pragma_Shared_Passive |
1170 Pragma_Storage_Size |
1171 Pragma_Storage_Unit |
1172 Pragma_Static_Elaboration_Desired |
1173 Pragma_Stream_Convert |
1176 Pragma_Suppress_All |
1177 Pragma_Suppress_Debug_Info |
1178 Pragma_Suppress_Exception_Locations |
1179 Pragma_Suppress_Initialization |
1180 Pragma_System_Name |
1181 Pragma_Task_Dispatching_Policy |
1184 Pragma_Task_Storage |
1187 Pragma_Unchecked_Union |
1188 Pragma_Unimplemented_Unit |
1189 Pragma_Universal_Aliasing |
1190 Pragma_Universal_Data |
1192 Pragma_Unreferenced |
1193 Pragma_Unreferenced_Objects |
1194 Pragma_Unreserve_All_Interrupts |
1196 Pragma_Use_VADS_Size |
1198 Pragma_Volatile_Components |
1199 Pragma_Weak_External |
1200 Pragma_Validity_Checks
=>
1203 --------------------
1204 -- Unknown_Pragma --
1205 --------------------
1207 -- Should be impossible, since we excluded this case earlier on
1209 when Unknown_Pragma
=>
1210 raise Program_Error
;
1216 --------------------
1217 -- Error Handling --
1218 --------------------
1221 when Error_Resync
=>