1 ------------------------------------------------------------------------------
3 -- GNAT COMPILER COMPONENTS --
9 -- Copyright (C) 1992-2006, 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 2, 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 COPYING. If not, write --
19 -- to the Free Software Foundation, 51 Franklin Street, Fifth Floor, --
20 -- Boston, MA 02110-1301, USA. --
22 -- GNAT was originally developed by the GNAT team at New York University. --
23 -- Extensive contributions were provided by Ada Core Technologies Inc. --
25 ------------------------------------------------------------------------------
27 -- Generally the parser checks the basic syntax of pragmas, but does not
28 -- do specialized syntax checks for individual pragmas, these are deferred
29 -- to semantic analysis time (see unit Sem_Prag). There are some pragmas
30 -- which require recognition and either partial or complete processing
31 -- during parsing, and this unit performs this required processing.
33 with Fname.UF; use Fname.UF;
34 with Osint; use Osint;
35 with Rident; use Rident;
36 with Restrict; use Restrict;
37 with Stringt; use Stringt;
38 with Stylesw; use Stylesw;
39 with Uintp; use Uintp;
40 with Uname; use Uname;
42 with System.WCh_Con; use System.WCh_Con;
46 function Prag (Pragma_Node : Node_Id; Semi : Source_Ptr) return Node_Id is
47 Pragma_Name : constant Name_Id := Chars (Pragma_Node);
48 Prag_Id : constant Pragma_Id := Get_Pragma_Id (Pragma_Name);
49 Pragma_Sloc : constant Source_Ptr := Sloc (Pragma_Node);
53 -----------------------
54 -- Local Subprograms --
55 -----------------------
57 function Arg1 return Node_Id;
58 function Arg2 return Node_Id;
59 function Arg3 return Node_Id;
60 -- Obtain specified Pragma_Argument_Association. It is allowable to call
61 -- the routine for the argument one past the last present argument, but
62 -- that is the only case in which a non-present argument can be referenced.
64 procedure Check_Arg_Count (Required : Int);
65 -- Check argument count for pragma = Required.
66 -- If not give error and raise Error_Resync.
68 procedure Check_Arg_Is_String_Literal (Arg : Node_Id);
69 -- Check the expression of the specified argument to make sure that it
70 -- is a string literal. If not give error and raise Error_Resync.
72 procedure Check_Arg_Is_On_Or_Off (Arg : Node_Id);
73 -- Check the expression of the specified argument to make sure that it
74 -- is an identifier which is either ON or OFF, and if not, then issue
75 -- an error message and raise Error_Resync.
77 procedure Check_No_Identifier (Arg : Node_Id);
78 -- Checks that the given argument does not have an identifier. If
79 -- an identifier is present, then an error message is issued, and
80 -- Error_Resync is raised.
82 procedure Check_Optional_Identifier (Arg : Node_Id; Id : Name_Id);
83 -- Checks if the given argument has an identifier, and if so, requires
84 -- it to match the given identifier name. If there is a non-matching
85 -- identifier, then an error message is given and Error_Resync raised.
87 procedure Check_Required_Identifier (Arg : Node_Id; Id : Name_Id);
88 -- Same as Check_Optional_Identifier, except that the name is required
89 -- to be present and to match the given Id value.
91 procedure Process_Restrictions_Or_Restriction_Warnings;
92 -- Common processing for Restrictions and Restriction_Warnings pragmas.
93 -- This routine only processes the case of No_Obsolescent_Features,
94 -- which is the only restriction that has syntactic effects. No general
95 -- error checking is done, since this will be done in Sem_Prag. The
96 -- other case processed is pragma Restrictions No_Dependence, since
97 -- otherwise this is done too late.
103 function Arg1 return Node_Id is
105 return First (Pragma_Argument_Associations (Pragma_Node));
112 function Arg2 return Node_Id is
121 function Arg3 return Node_Id is
126 ---------------------
127 -- Check_Arg_Count --
128 ---------------------
130 procedure Check_Arg_Count (Required : Int) is
132 if Arg_Count /= Required then
133 Error_Msg ("wrong number of arguments for pragma%", Pragma_Sloc);
138 ----------------------------
139 -- Check_Arg_Is_On_Or_Off --
140 ----------------------------
142 procedure Check_Arg_Is_On_Or_Off (Arg : Node_Id) is
143 Argx : constant Node_Id := Expression (Arg);
146 if Nkind (Expression (Arg)) /= N_Identifier
147 or else (Chars (Argx) /= Name_On
149 Chars (Argx) /= Name_Off)
151 Error_Msg_Name_2 := Name_On;
152 Error_Msg_Name_3 := Name_Off;
155 ("argument for pragma% must be% or%", Sloc (Argx));
158 end Check_Arg_Is_On_Or_Off;
160 ---------------------------------
161 -- Check_Arg_Is_String_Literal --
162 ---------------------------------
164 procedure Check_Arg_Is_String_Literal (Arg : Node_Id) is
166 if Nkind (Expression (Arg)) /= N_String_Literal then
168 ("argument for pragma% must be string literal",
169 Sloc (Expression (Arg)));
172 end Check_Arg_Is_String_Literal;
174 -------------------------
175 -- Check_No_Identifier --
176 -------------------------
178 procedure Check_No_Identifier (Arg : Node_Id) is
180 if Chars (Arg) /= No_Name then
181 Error_Msg_N ("pragma% does not permit named arguments", Arg);
184 end Check_No_Identifier;
186 -------------------------------
187 -- Check_Optional_Identifier --
188 -------------------------------
190 procedure Check_Optional_Identifier (Arg : Node_Id; Id : Name_Id) is
192 if Present (Arg) and then Chars (Arg) /= No_Name then
193 if Chars (Arg) /= Id then
194 Error_Msg_Name_2 := Id;
195 Error_Msg_N ("pragma% argument expects identifier%", Arg);
198 end Check_Optional_Identifier;
200 -------------------------------
201 -- Check_Required_Identifier --
202 -------------------------------
204 procedure Check_Required_Identifier (Arg : Node_Id; Id : Name_Id) is
206 if Chars (Arg) /= Id then
207 Error_Msg_Name_2 := Id;
208 Error_Msg_N ("pragma% argument must have identifier%", Arg);
210 end Check_Required_Identifier;
212 --------------------------------------------------
213 -- Process_Restrictions_Or_Restriction_Warnings --
214 --------------------------------------------------
216 procedure Process_Restrictions_Or_Restriction_Warnings is
223 while Present (Arg) loop
225 Expr := Expression (Arg);
228 and then Nkind (Expr) = N_Identifier
229 and then Get_Restriction_Id (Chars (Expr)) = No_Obsolescent_Features
231 Set_Restriction (No_Obsolescent_Features, Pragma_Node);
232 Restriction_Warnings (No_Obsolescent_Features) :=
233 Prag_Id = Pragma_Restriction_Warnings;
235 elsif Id = Name_No_Dependence then
236 Set_Restriction_No_Dependence
238 Warn => Prag_Id = Pragma_Restriction_Warnings);
243 end Process_Restrictions_Or_Restriction_Warnings;
245 -- Start if processing for Prag
248 Error_Msg_Name_1 := Pragma_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 Name_Id;
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 patterm form of pragma
537 function Get_Fname (Arg : Node_Id) return Name_Id 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 Get_Pragma_Id (Pragma_Name) = 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
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 |
1057 Pragma_Compile_Time_Error |
1058 Pragma_Compile_Time_Warning |
1059 Pragma_Convention_Identifier |
1061 Pragma_CPP_Constructor |
1062 Pragma_CPP_Virtual |
1064 Pragma_C_Pass_By_Copy |
1066 Pragma_Common_Object |
1067 Pragma_Complete_Representation |
1068 Pragma_Complex_Representation |
1069 Pragma_Component_Alignment |
1072 Pragma_Debug_Policy |
1073 Pragma_Detect_Blocking |
1074 Pragma_Discard_Names |
1077 Pragma_Elaborate_All |
1078 Pragma_Elaborate_Body |
1079 Pragma_Elaboration_Checks |
1080 Pragma_Explicit_Overriding |
1082 Pragma_Export_Exception |
1083 Pragma_Export_Function |
1084 Pragma_Export_Object |
1085 Pragma_Export_Procedure |
1086 Pragma_Export_Value |
1087 Pragma_Export_Valued_Procedure |
1088 Pragma_Extend_System |
1090 Pragma_External_Name_Casing |
1091 Pragma_Finalize_Storage_Only |
1092 Pragma_Float_Representation |
1095 Pragma_Import_Exception |
1096 Pragma_Import_Function |
1097 Pragma_Import_Object |
1098 Pragma_Import_Procedure |
1099 Pragma_Import_Valued_Procedure |
1100 Pragma_Initialize_Scalars |
1102 Pragma_Inline_Always |
1103 Pragma_Inline_Generic |
1104 Pragma_Inspection_Point |
1106 Pragma_Interface_Name |
1107 Pragma_Interrupt_Handler |
1108 Pragma_Interrupt_State |
1109 Pragma_Interrupt_Priority |
1110 Pragma_Java_Constructor |
1111 Pragma_Java_Interface |
1115 Pragma_Linker_Alias |
1116 Pragma_Linker_Constructor |
1117 Pragma_Linker_Destructor |
1118 Pragma_Linker_Options |
1119 Pragma_Linker_Section |
1120 Pragma_Locking_Policy |
1122 Pragma_Machine_Attribute |
1124 Pragma_Main_Storage |
1125 Pragma_Memory_Size |
1127 Pragma_Obsolescent |
1128 Pragma_No_Run_Time |
1129 Pragma_No_Strict_Aliasing |
1130 Pragma_Normalize_Scalars |
1132 Pragma_Optional_Overriding |
1135 Pragma_Preelaborable_Initialization |
1137 Pragma_Persistent_BSS |
1138 Pragma_Preelaborate |
1139 Pragma_Preelaborate_05 |
1141 Pragma_Priority_Specific_Dispatching |
1143 Pragma_Profile_Warnings |
1144 Pragma_Propagate_Exceptions |
1145 Pragma_Psect_Object |
1148 Pragma_Pure_Function |
1149 Pragma_Queuing_Policy |
1150 Pragma_Remote_Call_Interface |
1151 Pragma_Remote_Types |
1152 Pragma_Restricted_Run_Time |
1155 Pragma_Share_Generic |
1157 Pragma_Shared_Passive |
1158 Pragma_Storage_Size |
1159 Pragma_Storage_Unit |
1160 Pragma_Stream_Convert |
1163 Pragma_Suppress_All |
1164 Pragma_Suppress_Debug_Info |
1165 Pragma_Suppress_Exception_Locations |
1166 Pragma_Suppress_Initialization |
1167 Pragma_System_Name |
1168 Pragma_Task_Dispatching_Policy |
1171 Pragma_Task_Storage |
1172 Pragma_Thread_Body |
1175 Pragma_Unchecked_Union |
1176 Pragma_Unimplemented_Unit |
1177 Pragma_Universal_Data |
1178 Pragma_Unreferenced |
1179 Pragma_Unreferenced_Objects |
1180 Pragma_Unreserve_All_Interrupts |
1182 Pragma_Use_VADS_Size |
1184 Pragma_Volatile_Components |
1185 Pragma_Weak_External |
1186 Pragma_Validity_Checks =>
1189 --------------------
1190 -- Unknown_Pragma --
1191 --------------------
1193 -- Should be impossible, since we excluded this case earlier on
1195 when Unknown_Pragma =>
1196 raise Program_Error;
1202 --------------------
1203 -- Error Handling --
1204 --------------------
1207 when Error_Resync =>