1 ------------------------------------------------------------------------------
3 -- GNAT COMPILER COMPONENTS --
9 -- Copyright (C) 1992-2010, 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
;
153 Error_Msg
("argument for pragma% must be% or%", Sloc
(Argx
));
156 end Check_Arg_Is_On_Or_Off
;
158 ---------------------------------
159 -- Check_Arg_Is_String_Literal --
160 ---------------------------------
162 procedure Check_Arg_Is_String_Literal
(Arg
: Node_Id
) is
164 if Nkind
(Expression
(Arg
)) /= N_String_Literal
then
166 ("argument for pragma% must be string literal",
167 Sloc
(Expression
(Arg
)));
170 end Check_Arg_Is_String_Literal
;
172 -------------------------
173 -- Check_No_Identifier --
174 -------------------------
176 procedure Check_No_Identifier
(Arg
: Node_Id
) is
178 if Chars
(Arg
) /= No_Name
then
179 Error_Msg_N
("pragma% does not permit named arguments", Arg
);
182 end Check_No_Identifier
;
184 -------------------------------
185 -- Check_Optional_Identifier --
186 -------------------------------
188 procedure Check_Optional_Identifier
(Arg
: Node_Id
; Id
: Name_Id
) is
190 if Present
(Arg
) and then Chars
(Arg
) /= No_Name
then
191 if Chars
(Arg
) /= Id
then
192 Error_Msg_Name_2
:= Id
;
193 Error_Msg_N
("pragma% argument expects identifier%", Arg
);
196 end Check_Optional_Identifier
;
198 -------------------------------
199 -- Check_Required_Identifier --
200 -------------------------------
202 procedure Check_Required_Identifier
(Arg
: Node_Id
; Id
: Name_Id
) is
204 if Chars
(Arg
) /= Id
then
205 Error_Msg_Name_2
:= Id
;
206 Error_Msg_N
("pragma% argument must have identifier%", Arg
);
208 end Check_Required_Identifier
;
210 --------------------------------------------------
211 -- Process_Restrictions_Or_Restriction_Warnings --
212 --------------------------------------------------
214 procedure Process_Restrictions_Or_Restriction_Warnings
is
221 while Present
(Arg
) loop
223 Expr
:= Expression
(Arg
);
226 and then Nkind
(Expr
) = N_Identifier
227 and then Get_Restriction_Id
(Chars
(Expr
)) = No_Obsolescent_Features
229 Set_Restriction
(No_Obsolescent_Features
, Pragma_Node
);
230 Restriction_Warnings
(No_Obsolescent_Features
) :=
231 Prag_Id
= Pragma_Restriction_Warnings
;
233 elsif Id
= Name_No_Dependence
then
234 Set_Restriction_No_Dependence
236 Warn
=> Prag_Id
= Pragma_Restriction_Warnings
237 or else Treat_Restrictions_As_Warnings
);
242 end Process_Restrictions_Or_Restriction_Warnings
;
244 -- Start of processing for Prag
247 Error_Msg_Name_1
:= Prag_Name
;
249 -- Ignore unrecognized pragma. We let Sem post the warning for this, since
250 -- it is a semantic error, not a syntactic one (we have already checked
251 -- the syntax for the unrecognized pragma as required by (RM 2.8(11)).
253 if Prag_Id
= Unknown_Pragma
then
257 -- Count number of arguments. This loop also checks if any of the arguments
258 -- are Error, indicating a syntax error as they were parsed. If so, we
259 -- simply return, because we get into trouble with cascaded errors if we
260 -- try to perform our error checks on junk arguments.
264 if Present
(Pragma_Argument_Associations
(Pragma_Node
)) then
266 while Arg_Node
/= Empty
loop
267 Arg_Count
:= Arg_Count
+ 1;
269 if Expression
(Arg_Node
) = Error
then
277 -- Remaining processing is pragma dependent
285 -- This pragma must be processed at parse time, since we want to set
286 -- the Ada version properly at parse time to recognize the appropriate
287 -- Ada version syntax.
289 when Pragma_Ada_83
=>
290 Ada_Version
:= Ada_83
;
291 Ada_Version_Explicit
:= Ada_Version
;
297 -- This pragma must be processed at parse time, since we want to set
298 -- the Ada version properly at parse time to recognize the appropriate
299 -- Ada version syntax.
301 when Pragma_Ada_95
=>
302 Ada_Version
:= Ada_95
;
303 Ada_Version_Explicit
:= Ada_Version
;
305 ---------------------
306 -- Ada_05/Ada_2005 --
307 ---------------------
309 -- These pragmas must be processed at parse time, since we want to set
310 -- the Ada version properly at parse time to recognize the appropriate
311 -- Ada version syntax. However, it is only the zero argument form that
312 -- must be processed at parse time.
314 when Pragma_Ada_05 | Pragma_Ada_2005
=>
315 if Arg_Count
= 0 then
316 Ada_Version
:= Ada_05
;
317 Ada_Version_Explicit
:= Ada_05
;
320 ---------------------
321 -- Ada_12/Ada_2012 --
322 ---------------------
324 -- These pragmas must be processed at parse time, since we want to set
325 -- the Ada version properly at parse time to recognize the appropriate
326 -- Ada version syntax.
328 when Pragma_Ada_12 | Pragma_Ada_2012
=>
329 Ada_Version
:= Ada_12
;
330 Ada_Version_Explicit
:= Ada_12
;
336 -- pragma Debug (PROCEDURE_CALL_STATEMENT);
338 -- This has to be processed by the parser because of the very peculiar
339 -- form of the second parameter, which is syntactically from a formal
340 -- point of view a function call (since it must be an expression), but
341 -- semantically we treat it as a procedure call (which has exactly the
342 -- same syntactic form, so that's why we can get away with this!)
344 when Pragma_Debug
=> Debug
: declare
348 if Arg_Count
= 2 then
349 Check_No_Identifier
(Arg1
);
350 Check_No_Identifier
(Arg2
);
351 Expr
:= New_Copy
(Expression
(Arg2
));
355 Check_No_Identifier
(Arg1
);
356 Expr
:= New_Copy
(Expression
(Arg1
));
359 if Nkind
(Expr
) /= N_Indexed_Component
360 and then Nkind
(Expr
) /= N_Function_Call
361 and then Nkind
(Expr
) /= N_Identifier
362 and then Nkind
(Expr
) /= N_Selected_Component
365 ("argument of pragma% is not procedure call", Sloc
(Expr
));
369 (Pragma_Node
, P_Statement_Name
(Expr
));
373 -------------------------------
374 -- Extensions_Allowed (GNAT) --
375 -------------------------------
377 -- pragma Extensions_Allowed (Off | On)
379 -- The processing for pragma Extensions_Allowed must be done at
380 -- parse time, since extensions mode may affect what is accepted.
382 when Pragma_Extensions_Allowed
=>
384 Check_No_Identifier
(Arg1
);
385 Check_Arg_Is_On_Or_Off
(Arg1
);
387 if Chars
(Expression
(Arg1
)) = Name_On
then
388 Extensions_Allowed
:= True;
389 Ada_Version
:= Ada_12
;
391 Extensions_Allowed
:= False;
392 Ada_Version
:= Ada_Version_Explicit
;
399 -- pragma List (Off | On)
401 -- The processing for pragma List must be done at parse time,
402 -- since a listing can be generated in parse only mode.
406 Check_No_Identifier
(Arg1
);
407 Check_Arg_Is_On_Or_Off
(Arg1
);
409 -- We unconditionally make a List_On entry for the pragma, so that
410 -- in the List (Off) case, the pragma will print even in a region
411 -- of code with listing turned off (this is required!)
413 List_Pragmas
.Increment_Last
;
414 List_Pragmas
.Table
(List_Pragmas
.Last
) :=
415 (Ptyp
=> List_On
, Ploc
=> Sloc
(Pragma_Node
));
417 -- Now generate the list off entry for pragma List (Off)
419 if Chars
(Expression
(Arg1
)) = Name_Off
then
420 List_Pragmas
.Increment_Last
;
421 List_Pragmas
.Table
(List_Pragmas
.Last
) :=
422 (Ptyp
=> List_Off
, Ploc
=> Semi
);
431 -- Processing for this pragma must be done at parse time, since a
432 -- listing can be generated in parse only mode with semantics off.
436 List_Pragmas
.Increment_Last
;
437 List_Pragmas
.Table
(List_Pragmas
.Last
) := (Page
, Semi
);
443 -- pragma Restrictions (RESTRICTION {, RESTRICTION});
446 -- restriction_IDENTIFIER
447 -- | restriction_parameter_IDENTIFIER => EXPRESSION
449 -- We process the case of No_Obsolescent_Features, since this has
450 -- a syntactic effect that we need to detect at parse time (the use
451 -- of replacement characters such as colon for pound sign).
453 when Pragma_Restrictions
=>
454 Process_Restrictions_Or_Restriction_Warnings
;
456 --------------------------
457 -- Restriction_Warnings --
458 --------------------------
460 -- pragma Restriction_Warnings (RESTRICTION {, RESTRICTION});
463 -- restriction_IDENTIFIER
464 -- | restriction_parameter_IDENTIFIER => EXPRESSION
466 -- See above comment for pragma Restrictions
468 when Pragma_Restriction_Warnings
=>
469 Process_Restrictions_Or_Restriction_Warnings
;
471 ----------------------------------------------------------
472 -- Source_File_Name and Source_File_Name_Project (GNAT) --
473 ----------------------------------------------------------
475 -- These two pragmas have the same syntax and semantics.
476 -- There are five forms of these pragmas:
478 -- pragma Source_File_Name[_Project] (
479 -- [UNIT_NAME =>] unit_NAME,
480 -- BODY_FILE_NAME => STRING_LITERAL
481 -- [, [INDEX =>] INTEGER_LITERAL]);
483 -- pragma Source_File_Name[_Project] (
484 -- [UNIT_NAME =>] unit_NAME,
485 -- SPEC_FILE_NAME => STRING_LITERAL
486 -- [, [INDEX =>] INTEGER_LITERAL]);
488 -- pragma Source_File_Name[_Project] (
489 -- BODY_FILE_NAME => STRING_LITERAL
490 -- [, DOT_REPLACEMENT => STRING_LITERAL]
491 -- [, CASING => CASING_SPEC]);
493 -- pragma Source_File_Name[_Project] (
494 -- SPEC_FILE_NAME => STRING_LITERAL
495 -- [, DOT_REPLACEMENT => STRING_LITERAL]
496 -- [, CASING => CASING_SPEC]);
498 -- pragma Source_File_Name[_Project] (
499 -- SUBUNIT_FILE_NAME => STRING_LITERAL
500 -- [, DOT_REPLACEMENT => STRING_LITERAL]
501 -- [, CASING => CASING_SPEC]);
503 -- CASING_SPEC ::= Uppercase | Lowercase | Mixedcase
505 -- Pragma Source_File_Name_Project (SFNP) is equivalent to pragma
506 -- Source_File_Name (SFN), however their usage is exclusive:
507 -- SFN can only be used when no project file is used, while
508 -- SFNP can only be used when a project file is used.
510 -- The Project Manager produces a configuration pragmas file that
511 -- is communicated to the compiler with -gnatec switch. This file
512 -- contains only SFNP pragmas (at least two for the default naming
513 -- scheme. As this configuration pragmas file is always the first
514 -- processed by the compiler, it prevents the use of pragmas SFN in
515 -- other config files when a project file is in use.
517 -- Note: we process this during parsing, since we need to have the
518 -- source file names set well before the semantic analysis starts,
519 -- since we load the spec and with'ed packages before analysis.
521 when Pragma_Source_File_Name | Pragma_Source_File_Name_Project
=>
522 Source_File_Name
: declare
523 Unam
: Unit_Name_Type
;
533 function Get_Fname
(Arg
: Node_Id
) return File_Name_Type
;
534 -- Process file name from unit name form of pragma
536 function Get_String_Argument
(Arg
: Node_Id
) return String_Ptr
;
537 -- Process string literal value from argument
539 procedure Process_Casing
(Arg
: Node_Id
);
540 -- Process Casing argument of pattern form of pragma
542 procedure Process_Dot_Replacement
(Arg
: Node_Id
);
543 -- Process Dot_Replacement argument of pattern form of pragma
549 function Get_Fname
(Arg
: Node_Id
) return File_Name_Type
is
551 String_To_Name_Buffer
(Strval
(Expression
(Arg
)));
553 for J
in 1 .. Name_Len
loop
554 if Is_Directory_Separator
(Name_Buffer
(J
)) then
556 ("directory separator character not allowed",
557 Sloc
(Expression
(Arg
)) + Source_Ptr
(J
));
564 -------------------------
565 -- Get_String_Argument --
566 -------------------------
568 function Get_String_Argument
(Arg
: Node_Id
) return String_Ptr
is
572 if Nkind
(Expression
(Arg
)) /= N_String_Literal
574 Nkind
(Expression
(Arg
)) /= N_Operator_Symbol
577 ("argument for pragma% must be string literal", Arg
);
581 Str
:= Strval
(Expression
(Arg
));
583 -- Check string has no wide chars
585 for J
in 1 .. String_Length
(Str
) loop
586 if Get_String_Char
(Str
, J
) > 255 then
588 ("wide character not allowed in pattern for pragma%",
589 Sloc
(Expression
(Arg2
)) + Text_Ptr
(J
) - 1);
595 String_To_Name_Buffer
(Str
);
596 return new String'(Name_Buffer (1 .. Name_Len));
597 end Get_String_Argument;
603 procedure Process_Casing (Arg : Node_Id) is
604 Expr : constant Node_Id := Expression (Arg);
607 Check_Required_Identifier (Arg, Name_Casing);
609 if Nkind (Expr) = N_Identifier then
610 if Chars (Expr) = Name_Lowercase then
611 Cas := All_Lower_Case;
613 elsif Chars (Expr) = Name_Uppercase then
614 Cas := All_Upper_Case;
616 elsif Chars (Expr) = Name_Mixedcase then
623 ("Casing argument for pragma% must be " &
624 "one of Mixedcase, Lowercase, Uppercase",
628 -----------------------------
629 -- Process_Dot_Replacement --
630 -----------------------------
632 procedure Process_Dot_Replacement (Arg : Node_Id) is
634 Check_Required_Identifier (Arg, Name_Dot_Replacement);
635 Dot := Get_String_Argument (Arg);
636 end Process_Dot_Replacement;
638 -- Start of processing for Source_File_Name and
639 -- Source_File_Name_Project pragmas.
642 if Prag_Id = Pragma_Source_File_Name then
643 if Project_File_In_Use = In_Use then
645 ("pragma Source_File_Name cannot be used " &
646 "with a project file", Pragma_Sloc);
649 Project_File_In_Use := Not_In_Use;
653 if Project_File_In_Use = Not_In_Use then
655 ("pragma Source_File_Name_Project should only be used " &
656 "with a project file", Pragma_Sloc);
658 Project_File_In_Use := In_Use;
662 -- We permit from 1 to 3 arguments
664 if Arg_Count not in 1 .. 3 then
668 Expr1 := Expression (Arg1);
670 -- If first argument is identifier or selected component, then
671 -- we have the specific file case of the Source_File_Name pragma,
672 -- and the first argument is a unit name.
674 if Nkind (Expr1) = N_Identifier
676 (Nkind (Expr1) = N_Selected_Component
678 Nkind (Selector_Name (Expr1)) = N_Identifier)
680 if Nkind (Expr1) = N_Identifier
681 and then Chars (Expr1) = Name_System
684 ("pragma Source_File_Name may not be used for System",
689 -- Process index argument if present
691 if Arg_Count = 3 then
692 Expr := Expression (Arg3);
694 if Nkind (Expr) /= N_Integer_Literal
695 or else not UI_Is_In_Int_Range (Intval (Expr))
696 or else Intval (Expr) > 999
697 or else Intval (Expr) <= 0
700 ("pragma% index must be integer literal" &
701 " in range 1 .. 999", Sloc (Expr));
704 Index := UI_To_Int (Intval (Expr));
707 -- No index argument present
714 Check_Optional_Identifier (Arg1, Name_Unit_Name);
715 Unam := Get_Unit_Name (Expr1);
717 Check_Arg_Is_String_Literal (Arg2);
719 if Chars (Arg2) = Name_Spec_File_Name then
721 (Get_Spec_Name (Unam), Get_Fname (Arg2), Index);
723 elsif Chars (Arg2) = Name_Body_File_Name then
725 (Unam, Get_Fname (Arg2), Index);
729 ("pragma% argument has incorrect identifier", Arg2);
733 -- If the first argument is not an identifier, then we must have
734 -- the pattern form of the pragma, and the first argument must be
735 -- the pattern string with an appropriate name.
738 if Chars (Arg1) = Name_Spec_File_Name then
741 elsif Chars (Arg1) = Name_Body_File_Name then
744 elsif Chars (Arg1) = Name_Subunit_File_Name then
747 elsif Chars (Arg1) = Name_Unit_Name then
749 ("Unit_Name parameter for pragma% must be an identifier",
755 ("pragma% argument has incorrect identifier", Arg1);
759 Pat := Get_String_Argument (Arg1);
761 -- Check pattern has exactly one asterisk
764 for J in Pat'Range loop
765 if Pat (J) = '*' then
772 ("file name pattern must have exactly one * character",
777 -- Set defaults for Casing and Dot_Separator parameters
779 Cas := All_Lower_Case;
780 Dot := new String'(".");
782 -- Process second and third arguments if present
784 if Arg_Count
> 1 then
785 if Chars
(Arg2
) = Name_Casing
then
786 Process_Casing
(Arg2
);
788 if Arg_Count
= 3 then
789 Process_Dot_Replacement
(Arg3
);
793 Process_Dot_Replacement
(Arg2
);
795 if Arg_Count
= 3 then
796 Process_Casing
(Arg3
);
801 Set_File_Name_Pattern
(Pat
, Typ
, Dot
, Cas
);
803 end Source_File_Name
;
805 -----------------------------
806 -- Source_Reference (GNAT) --
807 -----------------------------
809 -- pragma Source_Reference
810 -- (INTEGER_LITERAL [, STRING_LITERAL] );
812 -- Processing for this pragma must be done at parse time, since error
813 -- messages needing the proper line numbers can be generated in parse
814 -- only mode with semantic checking turned off, and indeed we usually
815 -- turn off semantic checking anyway if any parse errors are found.
817 when Pragma_Source_Reference
=> Source_Reference
: declare
818 Fname
: File_Name_Type
;
821 if Arg_Count
/= 1 then
823 Check_No_Identifier
(Arg2
);
826 -- Check that this is first line of file. We skip this test if
827 -- we are in syntax check only mode, since we may be dealing with
828 -- multiple compilation units.
830 if Get_Physical_Line_Number
(Pragma_Sloc
) /= 1
831 and then Num_SRef_Pragmas
(Current_Source_File
) = 0
832 and then Operating_Mode
/= Check_Syntax
835 ("first % pragma must be first line of file", Pragma_Sloc
);
839 Check_No_Identifier
(Arg1
);
841 if Arg_Count
= 1 then
842 if Num_SRef_Pragmas
(Current_Source_File
) = 0 then
844 ("file name required for first % pragma in file",
854 Check_Arg_Is_String_Literal
(Arg2
);
855 String_To_Name_Buffer
(Strval
(Expression
(Arg2
)));
858 if Num_SRef_Pragmas
(Current_Source_File
) > 0 then
859 if Fname
/= Full_Ref_Name
(Current_Source_File
) then
861 ("file name must be same in all % pragmas", Pragma_Sloc
);
867 if Nkind
(Expression
(Arg1
)) /= N_Integer_Literal
then
869 ("argument for pragma% must be integer literal",
870 Sloc
(Expression
(Arg1
)));
873 -- OK, this source reference pragma is effective, however, we
874 -- ignore it if it is not in the first unit in the multiple unit
875 -- case. This is because the only purpose in this case is to
876 -- provide source pragmas for subsequent use by gnatchop.
879 if Num_Library_Units
= 1 then
880 Register_Source_Ref_Pragma
882 Strip_Directory
(Fname
),
883 UI_To_Int
(Intval
(Expression
(Arg1
))),
884 Get_Physical_Line_Number
(Pragma_Sloc
) + 1);
887 end Source_Reference
;
889 -------------------------
890 -- Style_Checks (GNAT) --
891 -------------------------
893 -- pragma Style_Checks (On | Off | ALL_CHECKS | STRING_LITERAL);
895 -- This is processed by the parser since some of the style
896 -- checks take place during source scanning and parsing.
898 when Pragma_Style_Checks
=> Style_Checks
: declare
902 OK
: Boolean := True;
905 -- Two argument case is only for semantics
907 if Arg_Count
= 2 then
912 Check_No_Identifier
(Arg1
);
913 A
:= Expression
(Arg1
);
915 if Nkind
(A
) = N_String_Literal
then
919 Slen
: constant Natural := Natural (String_Length
(S
));
920 Options
: String (1 .. Slen
);
927 C
:= Get_String_Char
(S
, Int
(J
));
929 if not In_Character_Range
(C
) then
935 Options
(J
) := Get_Character
(C
);
939 Set_Style_Check_Options
(Options
, OK
, Ptr
);
949 (Style_Msg_Buf
(1 .. Style_Msg_Len
),
950 Sloc
(Expression
(Arg1
)) + Source_Ptr
(Ptr
));
955 elsif Nkind
(A
) /= N_Identifier
then
958 elsif Chars
(A
) = Name_All_Checks
then
960 Stylesw
.Set_GNAT_Style_Check_Options
;
962 Stylesw
.Set_Default_Style_Check_Options
;
965 elsif Chars
(A
) = Name_On
then
968 elsif Chars
(A
) = Name_Off
then
969 Style_Check
:= False;
976 Error_Msg
("incorrect argument for pragma%", Sloc
(A
));
982 ---------------------
983 -- Warnings (GNAT) --
984 ---------------------
986 -- pragma Warnings (On | Off);
987 -- pragma Warnings (On | Off, LOCAL_NAME);
988 -- pragma Warnings (static_string_EXPRESSION);
989 -- pragma Warnings (On | Off, static_string_EXPRESSION);
991 -- The one argument ON/OFF case is processed by the parser, since it may
992 -- control parser warnings as well as semantic warnings, and in any case
993 -- we want to be absolutely sure that the range in the warnings table is
994 -- set well before any semantic analysis is performed. Note that we
995 -- ignore this pragma if debug flag -gnatd.i is set.
997 when Pragma_Warnings
=>
998 if Arg_Count
= 1 and then not Debug_Flag_Dot_I
then
999 Check_No_Identifier
(Arg1
);
1002 Argx
: constant Node_Id
:= Expression
(Arg1
);
1004 if Nkind
(Argx
) = N_Identifier
then
1005 if Chars
(Argx
) = Name_On
then
1006 Set_Warnings_Mode_On
(Pragma_Sloc
);
1007 elsif Chars
(Argx
) = Name_Off
then
1008 Set_Warnings_Mode_Off
(Pragma_Sloc
);
1014 -----------------------------
1015 -- Wide_Character_Encoding --
1016 -----------------------------
1018 -- pragma Wide_Character_Encoding (IDENTIFIER | CHARACTER_LITERAL);
1020 -- This is processed by the parser, since the scanner is affected
1022 when Pragma_Wide_Character_Encoding
=> Wide_Character_Encoding
: declare
1026 Check_Arg_Count
(1);
1027 Check_No_Identifier
(Arg1
);
1028 A
:= Expression
(Arg1
);
1030 if Nkind
(A
) = N_Identifier
then
1031 Get_Name_String
(Chars
(A
));
1032 Wide_Character_Encoding_Method
:=
1033 Get_WC_Encoding_Method
(Name_Buffer
(1 .. Name_Len
));
1035 elsif Nkind
(A
) = N_Character_Literal
then
1037 R
: constant Char_Code
:=
1038 Char_Code
(UI_To_Int
(Char_Literal_Value
(A
)));
1040 if In_Character_Range
(R
) then
1041 Wide_Character_Encoding_Method
:=
1042 Get_WC_Encoding_Method
(Get_Character
(R
));
1044 raise Constraint_Error
;
1049 raise Constraint_Error
;
1052 Upper_Half_Encoding
:=
1053 Wide_Character_Encoding_Method
in
1054 WC_Upper_Half_Encoding_Method
;
1057 when Constraint_Error
=>
1058 Error_Msg_N
("invalid argument for pragma%", Arg1
);
1059 end Wide_Character_Encoding
;
1061 -----------------------
1062 -- All Other Pragmas --
1063 -----------------------
1065 -- For all other pragmas, checking and processing is handled
1066 -- entirely in Sem_Prag, and no further checking is done by Par.
1068 when Pragma_Abort_Defer |
1069 Pragma_Assertion_Policy |
1070 Pragma_Assume_No_Invalid_Values |
1072 Pragma_All_Calls_Remote |
1075 Pragma_Asynchronous |
1077 Pragma_Atomic_Components |
1078 Pragma_Attach_Handler |
1081 Pragma_Check_Policy |
1082 Pragma_CIL_Constructor |
1083 Pragma_Compile_Time_Error |
1084 Pragma_Compile_Time_Warning |
1085 Pragma_Compiler_Unit |
1086 Pragma_Convention_Identifier |
1088 Pragma_CPP_Constructor |
1089 Pragma_CPP_Virtual |
1091 Pragma_C_Pass_By_Copy |
1093 Pragma_Common_Object |
1094 Pragma_Complete_Representation |
1095 Pragma_Complex_Representation |
1096 Pragma_Component_Alignment |
1099 Pragma_Debug_Policy |
1100 Pragma_Detect_Blocking |
1102 Pragma_Discard_Names |
1105 Pragma_Elaborate_All |
1106 Pragma_Elaborate_Body |
1107 Pragma_Elaboration_Checks |
1109 Pragma_Export_Exception |
1110 Pragma_Export_Function |
1111 Pragma_Export_Object |
1112 Pragma_Export_Procedure |
1113 Pragma_Export_Value |
1114 Pragma_Export_Valued_Procedure |
1115 Pragma_Extend_System |
1117 Pragma_External_Name_Casing |
1118 Pragma_Favor_Top_Level |
1120 Pragma_Finalize_Storage_Only |
1121 Pragma_Float_Representation |
1123 Pragma_Implemented_By_Entry |
1124 Pragma_Implicit_Packing |
1126 Pragma_Import_Exception |
1127 Pragma_Import_Function |
1128 Pragma_Import_Object |
1129 Pragma_Import_Procedure |
1130 Pragma_Import_Valued_Procedure |
1131 Pragma_Initialize_Scalars |
1133 Pragma_Inline_Always |
1134 Pragma_Inline_Generic |
1135 Pragma_Inspection_Point |
1137 Pragma_Interface_Name |
1138 Pragma_Interrupt_Handler |
1139 Pragma_Interrupt_State |
1140 Pragma_Interrupt_Priority |
1141 Pragma_Java_Constructor |
1142 Pragma_Java_Interface |
1146 Pragma_Linker_Alias |
1147 Pragma_Linker_Constructor |
1148 Pragma_Linker_Destructor |
1149 Pragma_Linker_Options |
1150 Pragma_Linker_Section |
1151 Pragma_Locking_Policy |
1153 Pragma_Machine_Attribute |
1155 Pragma_Main_Storage |
1156 Pragma_Memory_Size |
1159 Pragma_Obsolescent |
1160 Pragma_No_Run_Time |
1161 Pragma_No_Strict_Aliasing |
1162 Pragma_Normalize_Scalars |
1164 Pragma_Optimize_Alignment |
1167 Pragma_Preelaborable_Initialization |
1169 Pragma_Persistent_BSS |
1170 Pragma_Postcondition |
1171 Pragma_Precondition |
1172 Pragma_Preelaborate |
1173 Pragma_Preelaborate_05 |
1175 Pragma_Priority_Specific_Dispatching |
1177 Pragma_Profile_Warnings |
1178 Pragma_Propagate_Exceptions |
1179 Pragma_Psect_Object |
1182 Pragma_Pure_Function |
1183 Pragma_Queuing_Policy |
1184 Pragma_Relative_Deadline |
1185 Pragma_Remote_Call_Interface |
1186 Pragma_Remote_Types |
1187 Pragma_Restricted_Run_Time |
1190 Pragma_Share_Generic |
1192 Pragma_Shared_Passive |
1193 Pragma_Short_Circuit_And_Or |
1194 Pragma_Storage_Size |
1195 Pragma_Storage_Unit |
1196 Pragma_Static_Elaboration_Desired |
1197 Pragma_Stream_Convert |
1200 Pragma_Suppress_All |
1201 Pragma_Suppress_Debug_Info |
1202 Pragma_Suppress_Exception_Locations |
1203 Pragma_Suppress_Initialization |
1204 Pragma_System_Name |
1205 Pragma_Task_Dispatching_Policy |
1208 Pragma_Task_Storage |
1209 Pragma_Thread_Local_Storage |
1212 Pragma_Unchecked_Union |
1213 Pragma_Unimplemented_Unit |
1214 Pragma_Universal_Aliasing |
1215 Pragma_Universal_Data |
1217 Pragma_Unreferenced |
1218 Pragma_Unreferenced_Objects |
1219 Pragma_Unreserve_All_Interrupts |
1221 Pragma_Use_VADS_Size |
1223 Pragma_Volatile_Components |
1224 Pragma_Weak_External |
1225 Pragma_Validity_Checks
=>
1228 --------------------
1229 -- Unknown_Pragma --
1230 --------------------
1232 -- Should be impossible, since we excluded this case earlier on
1234 when Unknown_Pragma
=>
1235 raise Program_Error
;
1241 --------------------
1242 -- Error Handling --
1243 --------------------
1246 when Error_Resync
=>