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------------------------------------------------------------------------------ -- -- -- GNAT COMPILER COMPONENTS -- -- -- -- P A R . P R A G -- -- -- -- B o d y -- -- -- -- Copyright (C) 1992-2009, Free Software Foundation, Inc. -- -- -- -- GNAT is free software; you can redistribute it and/or modify it under -- -- terms of the GNU General Public License as published by the Free Soft- -- -- ware Foundation; either version 3, or (at your option) any later ver- -- -- sion. GNAT is distributed in the hope that it will be useful, but WITH- -- -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY -- -- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License -- -- for more details. You should have received a copy of the GNU General -- -- Public License distributed with GNAT; see file COPYING3. If not, go to -- -- http://www.gnu.org/licenses for a complete copy of the license. -- -- -- -- GNAT was originally developed by the GNAT team at New York University. -- -- Extensive contributions were provided by Ada Core Technologies Inc. -- -- -- ------------------------------------------------------------------------------ -- Generally the parser checks the basic syntax of pragmas, but does not -- do specialized syntax checks for individual pragmas, these are deferred -- to semantic analysis time (see unit Sem_Prag). There are some pragmas -- which require recognition and either partial or complete processing -- during parsing, and this unit performs this required processing. with Fname.UF; use Fname.UF; with Osint; use Osint; with Rident; use Rident; with Restrict; use Restrict; with Stringt; use Stringt; with Stylesw; use Stylesw; with Uintp; use Uintp; with Uname; use Uname; with System.WCh_Con; use System.WCh_Con; separate (Par) function Prag (Pragma_Node : Node_Id; Semi : Source_Ptr) return Node_Id is Prag_Name : constant Name_Id := Pragma_Name (Pragma_Node); Prag_Id : constant Pragma_Id := Get_Pragma_Id (Prag_Name); Pragma_Sloc : constant Source_Ptr := Sloc (Pragma_Node); Arg_Count : Nat; Arg_Node : Node_Id; ----------------------- -- Local Subprograms -- ----------------------- function Arg1 return Node_Id; function Arg2 return Node_Id; function Arg3 return Node_Id; -- Obtain specified Pragma_Argument_Association. It is allowable to call -- the routine for the argument one past the last present argument, but -- that is the only case in which a non-present argument can be referenced. procedure Check_Arg_Count (Required : Int); -- Check argument count for pragma = Required. -- If not give error and raise Error_Resync. procedure Check_Arg_Is_String_Literal (Arg : Node_Id); -- Check the expression of the specified argument to make sure that it -- is a string literal. If not give error and raise Error_Resync. procedure Check_Arg_Is_On_Or_Off (Arg : Node_Id); -- Check the expression of the specified argument to make sure that it -- is an identifier which is either ON or OFF, and if not, then issue -- an error message and raise Error_Resync. procedure Check_No_Identifier (Arg : Node_Id); -- Checks that the given argument does not have an identifier. If -- an identifier is present, then an error message is issued, and -- Error_Resync is raised. procedure Check_Optional_Identifier (Arg : Node_Id; Id : Name_Id); -- Checks if the given argument has an identifier, and if so, requires -- it to match the given identifier name. If there is a non-matching -- identifier, then an error message is given and Error_Resync raised. procedure Check_Required_Identifier (Arg : Node_Id; Id : Name_Id); -- Same as Check_Optional_Identifier, except that the name is required -- to be present and to match the given Id value. procedure Process_Restrictions_Or_Restriction_Warnings; -- Common processing for Restrictions and Restriction_Warnings pragmas. -- This routine only processes the case of No_Obsolescent_Features, -- which is the only restriction that has syntactic effects. No general -- error checking is done, since this will be done in Sem_Prag. The -- other case processed is pragma Restrictions No_Dependence, since -- otherwise this is done too late. ---------- -- Arg1 -- ---------- function Arg1 return Node_Id is begin return First (Pragma_Argument_Associations (Pragma_Node)); end Arg1; ---------- -- Arg2 -- ---------- function Arg2 return Node_Id is begin return Next (Arg1); end Arg2; ---------- -- Arg3 -- ---------- function Arg3 return Node_Id is begin return Next (Arg2); end Arg3; --------------------- -- Check_Arg_Count -- --------------------- procedure Check_Arg_Count (Required : Int) is begin if Arg_Count /= Required then Error_Msg ("wrong number of arguments for pragma%", Pragma_Sloc); raise Error_Resync; end if; end Check_Arg_Count; ---------------------------- -- Check_Arg_Is_On_Or_Off -- ---------------------------- procedure Check_Arg_Is_On_Or_Off (Arg : Node_Id) is Argx : constant Node_Id := Expression (Arg); begin if Nkind (Expression (Arg)) /= N_Identifier or else (Chars (Argx) /= Name_On and then Chars (Argx) /= Name_Off) then Error_Msg_Name_2 := Name_On; Error_Msg_Name_3 := Name_Off; Error_Msg ("argument for pragma% must be% or%", Sloc (Argx)); raise Error_Resync; end if; end Check_Arg_Is_On_Or_Off; --------------------------------- -- Check_Arg_Is_String_Literal -- --------------------------------- procedure Check_Arg_Is_String_Literal (Arg : Node_Id) is begin if Nkind (Expression (Arg)) /= N_String_Literal then Error_Msg ("argument for pragma% must be string literal", Sloc (Expression (Arg))); raise Error_Resync; end if; end Check_Arg_Is_String_Literal; ------------------------- -- Check_No_Identifier -- ------------------------- procedure Check_No_Identifier (Arg : Node_Id) is begin if Chars (Arg) /= No_Name then Error_Msg_N ("pragma% does not permit named arguments", Arg); raise Error_Resync; end if; end Check_No_Identifier; ------------------------------- -- Check_Optional_Identifier -- ------------------------------- procedure Check_Optional_Identifier (Arg : Node_Id; Id : Name_Id) is begin if Present (Arg) and then Chars (Arg) /= No_Name then if Chars (Arg) /= Id then Error_Msg_Name_2 := Id; Error_Msg_N ("pragma% argument expects identifier%", Arg); end if; end if; end Check_Optional_Identifier; ------------------------------- -- Check_Required_Identifier -- ------------------------------- procedure Check_Required_Identifier (Arg : Node_Id; Id : Name_Id) is begin if Chars (Arg) /= Id then Error_Msg_Name_2 := Id; Error_Msg_N ("pragma% argument must have identifier%", Arg); end if; end Check_Required_Identifier; -------------------------------------------------- -- Process_Restrictions_Or_Restriction_Warnings -- -------------------------------------------------- procedure Process_Restrictions_Or_Restriction_Warnings is Arg : Node_Id; Id : Name_Id; Expr : Node_Id; begin Arg := Arg1; while Present (Arg) loop Id := Chars (Arg); Expr := Expression (Arg); if Id = No_Name and then Nkind (Expr) = N_Identifier and then Get_Restriction_Id (Chars (Expr)) = No_Obsolescent_Features then Set_Restriction (No_Obsolescent_Features, Pragma_Node); Restriction_Warnings (No_Obsolescent_Features) := Prag_Id = Pragma_Restriction_Warnings; elsif Id = Name_No_Dependence then Set_Restriction_No_Dependence (Unit => Expr, Warn => Prag_Id = Pragma_Restriction_Warnings or else Treat_Restrictions_As_Warnings); end if; Next (Arg); end loop; end Process_Restrictions_Or_Restriction_Warnings; -- Start of processing for Prag begin Error_Msg_Name_1 := Prag_Name; -- Ignore unrecognized pragma. We let Sem post the warning for this, since -- it is a semantic error, not a syntactic one (we have already checked -- the syntax for the unrecognized pragma as required by (RM 2.8(11)). if Prag_Id = Unknown_Pragma then return Pragma_Node; end if; -- Count number of arguments. This loop also checks if any of the arguments -- are Error, indicating a syntax error as they were parsed. If so, we -- simply return, because we get into trouble with cascaded errors if we -- try to perform our error checks on junk arguments. Arg_Count := 0; if Present (Pragma_Argument_Associations (Pragma_Node)) then Arg_Node := Arg1; while Arg_Node /= Empty loop Arg_Count := Arg_Count + 1; if Expression (Arg_Node) = Error then return Error; end if; Next (Arg_Node); end loop; end if; -- Remaining processing is pragma dependent case Prag_Id is ------------ -- Ada_83 -- ------------ -- This pragma must be processed at parse time, since we want to set -- the Ada version properly at parse time to recognize the appropriate -- Ada version syntax. when Pragma_Ada_83 => Ada_Version := Ada_83; Ada_Version_Explicit := Ada_Version; ------------ -- Ada_95 -- ------------ -- This pragma must be processed at parse time, since we want to set -- the Ada version properly at parse time to recognize the appropriate -- Ada version syntax. when Pragma_Ada_95 => Ada_Version := Ada_95; Ada_Version_Explicit := Ada_Version; --------------------- -- Ada_05/Ada_2005 -- --------------------- -- This pragma must be processed at parse time, since we want to set -- the Ada version properly at parse time to recognize the appropriate -- Ada version syntax. However, it is only the zero argument form that -- must be processed at parse time. when Pragma_Ada_05 | Pragma_Ada_2005 => if Arg_Count = 0 then Ada_Version := Ada_05; Ada_Version_Explicit := Ada_05; end if; ----------- -- Debug -- ----------- -- pragma Debug (PROCEDURE_CALL_STATEMENT); -- This has to be processed by the parser because of the very peculiar -- form of the second parameter, which is syntactically from a formal -- point of view a function call (since it must be an expression), but -- semantically we treat it as a procedure call (which has exactly the -- same syntactic form, so that's why we can get away with this!) when Pragma_Debug => Debug : declare Expr : Node_Id; begin if Arg_Count = 2 then Check_No_Identifier (Arg1); Check_No_Identifier (Arg2); Expr := New_Copy (Expression (Arg2)); else Check_Arg_Count (1); Check_No_Identifier (Arg1); Expr := New_Copy (Expression (Arg1)); end if; if Nkind (Expr) /= N_Indexed_Component and then Nkind (Expr) /= N_Function_Call and then Nkind (Expr) /= N_Identifier and then Nkind (Expr) /= N_Selected_Component then Error_Msg ("argument of pragma% is not procedure call", Sloc (Expr)); raise Error_Resync; else Set_Debug_Statement (Pragma_Node, P_Statement_Name (Expr)); end if; end Debug; ------------------------------- -- Extensions_Allowed (GNAT) -- ------------------------------- -- pragma Extensions_Allowed (Off | On) -- The processing for pragma Extensions_Allowed must be done at -- parse time, since extensions mode may affect what is accepted. when Pragma_Extensions_Allowed => Check_Arg_Count (1); Check_No_Identifier (Arg1); Check_Arg_Is_On_Or_Off (Arg1); if Chars (Expression (Arg1)) = Name_On then Extensions_Allowed := True; else Extensions_Allowed := False; end if; ---------------- -- List (2.8) -- ---------------- -- pragma List (Off | On) -- The processing for pragma List must be done at parse time, -- since a listing can be generated in parse only mode. when Pragma_List => Check_Arg_Count (1); Check_No_Identifier (Arg1); Check_Arg_Is_On_Or_Off (Arg1); -- We unconditionally make a List_On entry for the pragma, so that -- in the List (Off) case, the pragma will print even in a region -- of code with listing turned off (this is required!) List_Pragmas.Increment_Last; List_Pragmas.Table (List_Pragmas.Last) := (Ptyp => List_On, Ploc => Sloc (Pragma_Node)); -- Now generate the list off entry for pragma List (Off) if Chars (Expression (Arg1)) = Name_Off then List_Pragmas.Increment_Last; List_Pragmas.Table (List_Pragmas.Last) := (Ptyp => List_Off, Ploc => Semi); end if; ---------------- -- Page (2.8) -- ---------------- -- pragma Page; -- Processing for this pragma must be done at parse time, since a -- listing can be generated in parse only mode with semantics off. when Pragma_Page => Check_Arg_Count (0); List_Pragmas.Increment_Last; List_Pragmas.Table (List_Pragmas.Last) := (Page, Semi); ------------------ -- Restrictions -- ------------------ -- pragma Restrictions (RESTRICTION {, RESTRICTION}); -- RESTRICTION ::= -- restriction_IDENTIFIER -- | restriction_parameter_IDENTIFIER => EXPRESSION -- We process the case of No_Obsolescent_Features, since this has -- a syntactic effect that we need to detect at parse time (the use -- of replacement characters such as colon for pound sign). when Pragma_Restrictions => Process_Restrictions_Or_Restriction_Warnings; -------------------------- -- Restriction_Warnings -- -------------------------- -- pragma Restriction_Warnings (RESTRICTION {, RESTRICTION}); -- RESTRICTION ::= -- restriction_IDENTIFIER -- | restriction_parameter_IDENTIFIER => EXPRESSION -- See above comment for pragma Restrictions when Pragma_Restriction_Warnings => Process_Restrictions_Or_Restriction_Warnings; ---------------------------------------------------------- -- Source_File_Name and Source_File_Name_Project (GNAT) -- ---------------------------------------------------------- -- These two pragmas have the same syntax and semantics. -- There are five forms of these pragmas: -- pragma Source_File_Name[_Project] ( -- [UNIT_NAME =>] unit_NAME, -- BODY_FILE_NAME => STRING_LITERAL -- [, [INDEX =>] INTEGER_LITERAL]); -- pragma Source_File_Name[_Project] ( -- [UNIT_NAME =>] unit_NAME, -- SPEC_FILE_NAME => STRING_LITERAL -- [, [INDEX =>] INTEGER_LITERAL]); -- pragma Source_File_Name[_Project] ( -- BODY_FILE_NAME => STRING_LITERAL -- [, DOT_REPLACEMENT => STRING_LITERAL] -- [, CASING => CASING_SPEC]); -- pragma Source_File_Name[_Project] ( -- SPEC_FILE_NAME => STRING_LITERAL -- [, DOT_REPLACEMENT => STRING_LITERAL] -- [, CASING => CASING_SPEC]); -- pragma Source_File_Name[_Project] ( -- SUBUNIT_FILE_NAME => STRING_LITERAL -- [, DOT_REPLACEMENT => STRING_LITERAL] -- [, CASING => CASING_SPEC]); -- CASING_SPEC ::= Uppercase | Lowercase | Mixedcase -- Pragma Source_File_Name_Project (SFNP) is equivalent to pragma -- Source_File_Name (SFN), however their usage is exclusive: -- SFN can only be used when no project file is used, while -- SFNP can only be used when a project file is used. -- The Project Manager produces a configuration pragmas file that -- is communicated to the compiler with -gnatec switch. This file -- contains only SFNP pragmas (at least two for the default naming -- scheme. As this configuration pragmas file is always the first -- processed by the compiler, it prevents the use of pragmas SFN in -- other config files when a project file is in use. -- Note: we process this during parsing, since we need to have the -- source file names set well before the semantic analysis starts, -- since we load the spec and with'ed packages before analysis. when Pragma_Source_File_Name | Pragma_Source_File_Name_Project => Source_File_Name : declare Unam : Unit_Name_Type; Expr1 : Node_Id; Pat : String_Ptr; Typ : Character; Dot : String_Ptr; Cas : Casing_Type; Nast : Nat; Expr : Node_Id; Index : Nat; function Get_Fname (Arg : Node_Id) return File_Name_Type; -- Process file name from unit name form of pragma function Get_String_Argument (Arg : Node_Id) return String_Ptr; -- Process string literal value from argument procedure Process_Casing (Arg : Node_Id); -- Process Casing argument of pattern form of pragma procedure Process_Dot_Replacement (Arg : Node_Id); -- Process Dot_Replacement argument of pattern form of pragma --------------- -- Get_Fname -- --------------- function Get_Fname (Arg : Node_Id) return File_Name_Type is begin String_To_Name_Buffer (Strval (Expression (Arg))); for J in 1 .. Name_Len loop if Is_Directory_Separator (Name_Buffer (J)) then Error_Msg ("directory separator character not allowed", Sloc (Expression (Arg)) + Source_Ptr (J)); end if; end loop; return Name_Find; end Get_Fname; ------------------------- -- Get_String_Argument -- ------------------------- function Get_String_Argument (Arg : Node_Id) return String_Ptr is Str : String_Id; begin if Nkind (Expression (Arg)) /= N_String_Literal and then Nkind (Expression (Arg)) /= N_Operator_Symbol then Error_Msg_N ("argument for pragma% must be string literal", Arg); raise Error_Resync; end if; Str := Strval (Expression (Arg)); -- Check string has no wide chars for J in 1 .. String_Length (Str) loop if Get_String_Char (Str, J) > 255 then Error_Msg ("wide character not allowed in pattern for pragma%", Sloc (Expression (Arg2)) + Text_Ptr (J) - 1); end if; end loop; -- Acquire string String_To_Name_Buffer (Str); return new String'(Name_Buffer (1 .. Name_Len)); end Get_String_Argument; -------------------- -- Process_Casing -- -------------------- procedure Process_Casing (Arg : Node_Id) is Expr : constant Node_Id := Expression (Arg); begin Check_Required_Identifier (Arg, Name_Casing); if Nkind (Expr) = N_Identifier then if Chars (Expr) = Name_Lowercase then Cas := All_Lower_Case; return; elsif Chars (Expr) = Name_Uppercase then Cas := All_Upper_Case; return; elsif Chars (Expr) = Name_Mixedcase then Cas := Mixed_Case; return; end if; end if; Error_Msg_N ("Casing argument for pragma% must be " & "one of Mixedcase, Lowercase, Uppercase", Arg); end Process_Casing; ----------------------------- -- Process_Dot_Replacement -- ----------------------------- procedure Process_Dot_Replacement (Arg : Node_Id) is begin Check_Required_Identifier (Arg, Name_Dot_Replacement); Dot := Get_String_Argument (Arg); end Process_Dot_Replacement; -- Start of processing for Source_File_Name and -- Source_File_Name_Project pragmas. begin if Prag_Id = Pragma_Source_File_Name then if Project_File_In_Use = In_Use then Error_Msg ("pragma Source_File_Name cannot be used " & "with a project file", Pragma_Sloc); else Project_File_In_Use := Not_In_Use; end if; else if Project_File_In_Use = Not_In_Use then Error_Msg ("pragma Source_File_Name_Project should only be used " & "with a project file", Pragma_Sloc); else Project_File_In_Use := In_Use; end if; end if; -- We permit from 1 to 3 arguments if Arg_Count not in 1 .. 3 then Check_Arg_Count (1); end if; Expr1 := Expression (Arg1); -- If first argument is identifier or selected component, then -- we have the specific file case of the Source_File_Name pragma, -- and the first argument is a unit name. if Nkind (Expr1) = N_Identifier or else (Nkind (Expr1) = N_Selected_Component and then Nkind (Selector_Name (Expr1)) = N_Identifier) then if Nkind (Expr1) = N_Identifier and then Chars (Expr1) = Name_System then Error_Msg_N ("pragma Source_File_Name may not be used for System", Arg1); return Error; end if; -- Process index argument if present if Arg_Count = 3 then Expr := Expression (Arg3); if Nkind (Expr) /= N_Integer_Literal or else not UI_Is_In_Int_Range (Intval (Expr)) or else Intval (Expr) > 999 or else Intval (Expr) <= 0 then Error_Msg ("pragma% index must be integer literal" & " in range 1 .. 999", Sloc (Expr)); raise Error_Resync; else Index := UI_To_Int (Intval (Expr)); end if; -- No index argument present else Check_Arg_Count (2); Index := 0; end if; Check_Optional_Identifier (Arg1, Name_Unit_Name); Unam := Get_Unit_Name (Expr1); Check_Arg_Is_String_Literal (Arg2); if Chars (Arg2) = Name_Spec_File_Name then Set_File_Name (Get_Spec_Name (Unam), Get_Fname (Arg2), Index); elsif Chars (Arg2) = Name_Body_File_Name then Set_File_Name (Unam, Get_Fname (Arg2), Index); else Error_Msg_N ("pragma% argument has incorrect identifier", Arg2); return Pragma_Node; end if; -- If the first argument is not an identifier, then we must have -- the pattern form of the pragma, and the first argument must be -- the pattern string with an appropriate name. else if Chars (Arg1) = Name_Spec_File_Name then Typ := 's'; elsif Chars (Arg1) = Name_Body_File_Name then Typ := 'b'; elsif Chars (Arg1) = Name_Subunit_File_Name then Typ := 'u'; elsif Chars (Arg1) = Name_Unit_Name then Error_Msg_N ("Unit_Name parameter for pragma% must be an identifier", Arg1); raise Error_Resync; else Error_Msg_N ("pragma% argument has incorrect identifier", Arg1); raise Error_Resync; end if; Pat := Get_String_Argument (Arg1); -- Check pattern has exactly one asterisk Nast := 0; for J in Pat'Range loop if Pat (J) = '*' then Nast := Nast + 1; end if; end loop; if Nast /= 1 then Error_Msg_N ("file name pattern must have exactly one * character", Arg1); return Pragma_Node; end if; -- Set defaults for Casing and Dot_Separator parameters Cas := All_Lower_Case; Dot := new String'("."); -- Process second and third arguments if present if Arg_Count > 1 then if Chars (Arg2) = Name_Casing then Process_Casing (Arg2); if Arg_Count = 3 then Process_Dot_Replacement (Arg3); end if; else Process_Dot_Replacement (Arg2); if Arg_Count = 3 then Process_Casing (Arg3); end if; end if; end if; Set_File_Name_Pattern (Pat, Typ, Dot, Cas); end if; end Source_File_Name; ----------------------------- -- Source_Reference (GNAT) -- ----------------------------- -- pragma Source_Reference -- (INTEGER_LITERAL [, STRING_LITERAL] ); -- Processing for this pragma must be done at parse time, since error -- messages needing the proper line numbers can be generated in parse -- only mode with semantic checking turned off, and indeed we usually -- turn off semantic checking anyway if any parse errors are found. when Pragma_Source_Reference => Source_Reference : declare Fname : File_Name_Type; begin if Arg_Count /= 1 then Check_Arg_Count (2); Check_No_Identifier (Arg2); end if; -- Check that this is first line of file. We skip this test if -- we are in syntax check only mode, since we may be dealing with -- multiple compilation units. if Get_Physical_Line_Number (Pragma_Sloc) /= 1 and then Num_SRef_Pragmas (Current_Source_File) = 0 and then Operating_Mode /= Check_Syntax then Error_Msg -- CODEFIX ("first % pragma must be first line of file", Pragma_Sloc); raise Error_Resync; end if; Check_No_Identifier (Arg1); if Arg_Count = 1 then if Num_SRef_Pragmas (Current_Source_File) = 0 then Error_Msg ("file name required for first % pragma in file", Pragma_Sloc); raise Error_Resync; else Fname := No_File; end if; -- File name present else Check_Arg_Is_String_Literal (Arg2); String_To_Name_Buffer (Strval (Expression (Arg2))); Fname := Name_Find; if Num_SRef_Pragmas (Current_Source_File) > 0 then if Fname /= Full_Ref_Name (Current_Source_File) then Error_Msg ("file name must be same in all % pragmas", Pragma_Sloc); raise Error_Resync; end if; end if; end if; if Nkind (Expression (Arg1)) /= N_Integer_Literal then Error_Msg ("argument for pragma% must be integer literal", Sloc (Expression (Arg1))); raise Error_Resync; -- OK, this source reference pragma is effective, however, we -- ignore it if it is not in the first unit in the multiple unit -- case. This is because the only purpose in this case is to -- provide source pragmas for subsequent use by gnatchop. else if Num_Library_Units = 1 then Register_Source_Ref_Pragma (Fname, Strip_Directory (Fname), UI_To_Int (Intval (Expression (Arg1))), Get_Physical_Line_Number (Pragma_Sloc) + 1); end if; end if; end Source_Reference; ------------------------- -- Style_Checks (GNAT) -- ------------------------- -- pragma Style_Checks (On | Off | ALL_CHECKS | STRING_LITERAL); -- This is processed by the parser since some of the style -- checks take place during source scanning and parsing. when Pragma_Style_Checks => Style_Checks : declare A : Node_Id; S : String_Id; C : Char_Code; OK : Boolean := True; begin -- Two argument case is only for semantics if Arg_Count = 2 then null; else Check_Arg_Count (1); Check_No_Identifier (Arg1); A := Expression (Arg1); if Nkind (A) = N_String_Literal then S := Strval (A); declare Slen : constant Natural := Natural (String_Length (S)); Options : String (1 .. Slen); J : Natural; Ptr : Natural; begin J := 1; loop C := Get_String_Char (S, Int (J)); if not In_Character_Range (C) then OK := False; Ptr := J; exit; else Options (J) := Get_Character (C); end if; if J = Slen then Set_Style_Check_Options (Options, OK, Ptr); exit; else J := J + 1; end if; end loop; if not OK then Error_Msg (Style_Msg_Buf (1 .. Style_Msg_Len), Sloc (Expression (Arg1)) + Source_Ptr (Ptr)); raise Error_Resync; end if; end; elsif Nkind (A) /= N_Identifier then OK := False; elsif Chars (A) = Name_All_Checks then Stylesw.Set_Default_Style_Check_Options; elsif Chars (A) = Name_On then Style_Check := True; elsif Chars (A) = Name_Off then Style_Check := False; else OK := False; end if; if not OK then Error_Msg ("incorrect argument for pragma%", Sloc (A)); raise Error_Resync; end if; end if; end Style_Checks; --------------------- -- Warnings (GNAT) -- --------------------- -- pragma Warnings (On | Off); -- pragma Warnings (On | Off, LOCAL_NAME); -- pragma Warnings (static_string_EXPRESSION); -- pragma Warnings (On | Off, static_string_EXPRESSION); -- The one argument ON/OFF case is processed by the parser, since it may -- control parser warnings as well as semantic warnings, and in any case -- we want to be absolutely sure that the range in the warnings table is -- set well before any semantic analysis is performed. Note that we -- ignore this pragma if debug flag -gnatd.i is set. when Pragma_Warnings => if Arg_Count = 1 and then not Debug_Flag_Dot_I then Check_No_Identifier (Arg1); declare Argx : constant Node_Id := Expression (Arg1); begin if Nkind (Argx) = N_Identifier then if Chars (Argx) = Name_On then Set_Warnings_Mode_On (Pragma_Sloc); elsif Chars (Argx) = Name_Off then Set_Warnings_Mode_Off (Pragma_Sloc); end if; end if; end; end if; ----------------------------- -- Wide_Character_Encoding -- ----------------------------- -- pragma Wide_Character_Encoding (IDENTIFIER | CHARACTER_LITERAL); -- This is processed by the parser, since the scanner is affected when Pragma_Wide_Character_Encoding => Wide_Character_Encoding : declare A : Node_Id; begin Check_Arg_Count (1); Check_No_Identifier (Arg1); A := Expression (Arg1); if Nkind (A) = N_Identifier then Get_Name_String (Chars (A)); Wide_Character_Encoding_Method := Get_WC_Encoding_Method (Name_Buffer (1 .. Name_Len)); elsif Nkind (A) = N_Character_Literal then declare R : constant Char_Code := Char_Code (UI_To_Int (Char_Literal_Value (A))); begin if In_Character_Range (R) then Wide_Character_Encoding_Method := Get_WC_Encoding_Method (Get_Character (R)); else raise Constraint_Error; end if; end; else raise Constraint_Error; end if; Upper_Half_Encoding := Wide_Character_Encoding_Method in WC_Upper_Half_Encoding_Method; exception when Constraint_Error => Error_Msg_N ("invalid argument for pragma%", Arg1); end Wide_Character_Encoding; ----------------------- -- All Other Pragmas -- ----------------------- -- For all other pragmas, checking and processing is handled -- entirely in Sem_Prag, and no further checking is done by Par. when Pragma_Abort_Defer | Pragma_Assertion_Policy | Pragma_Assume_No_Invalid_Values | Pragma_AST_Entry | Pragma_All_Calls_Remote | Pragma_Annotate | Pragma_Assert | Pragma_Asynchronous | Pragma_Atomic | Pragma_Atomic_Components | Pragma_Attach_Handler | Pragma_Check | Pragma_Check_Name | Pragma_Check_Policy | Pragma_CIL_Constructor | Pragma_Compile_Time_Error | Pragma_Compile_Time_Warning | Pragma_Compiler_Unit | Pragma_Convention_Identifier | Pragma_CPP_Class | Pragma_CPP_Constructor | Pragma_CPP_Virtual | Pragma_CPP_Vtable | Pragma_C_Pass_By_Copy | Pragma_Comment | Pragma_Common_Object | Pragma_Complete_Representation | Pragma_Complex_Representation | Pragma_Component_Alignment | Pragma_Controlled | Pragma_Convention | Pragma_Debug_Policy | Pragma_Detect_Blocking | Pragma_Dimension | Pragma_Discard_Names | Pragma_Eliminate | Pragma_Elaborate | Pragma_Elaborate_All | Pragma_Elaborate_Body | Pragma_Elaboration_Checks | Pragma_Export | Pragma_Export_Exception | Pragma_Export_Function | Pragma_Export_Object | Pragma_Export_Procedure | Pragma_Export_Value | Pragma_Export_Valued_Procedure | Pragma_Extend_System | Pragma_External | Pragma_External_Name_Casing | Pragma_Favor_Top_Level | Pragma_Fast_Math | Pragma_Finalize_Storage_Only | Pragma_Float_Representation | Pragma_Ident | Pragma_Implemented_By_Entry | Pragma_Implicit_Packing | Pragma_Import | Pragma_Import_Exception | Pragma_Import_Function | Pragma_Import_Object | Pragma_Import_Procedure | Pragma_Import_Valued_Procedure | Pragma_Initialize_Scalars | Pragma_Inline | Pragma_Inline_Always | Pragma_Inline_Generic | Pragma_Inspection_Point | Pragma_Interface | Pragma_Interface_Name | Pragma_Interrupt_Handler | Pragma_Interrupt_State | Pragma_Interrupt_Priority | Pragma_Java_Constructor | Pragma_Java_Interface | Pragma_Keep_Names | Pragma_License | Pragma_Link_With | Pragma_Linker_Alias | Pragma_Linker_Constructor | Pragma_Linker_Destructor | Pragma_Linker_Options | Pragma_Linker_Section | Pragma_Locking_Policy | Pragma_Long_Float | Pragma_Machine_Attribute | Pragma_Main | Pragma_Main_Storage | Pragma_Memory_Size | Pragma_No_Body | Pragma_No_Return | Pragma_Obsolescent | Pragma_No_Run_Time | Pragma_No_Strict_Aliasing | Pragma_Normalize_Scalars | Pragma_Optimize | Pragma_Optimize_Alignment | Pragma_Pack | Pragma_Passive | Pragma_Preelaborable_Initialization | Pragma_Polling | Pragma_Persistent_BSS | Pragma_Postcondition | Pragma_Precondition | Pragma_Preelaborate | Pragma_Preelaborate_05 | Pragma_Priority | Pragma_Priority_Specific_Dispatching | Pragma_Profile | Pragma_Profile_Warnings | Pragma_Propagate_Exceptions | Pragma_Psect_Object | Pragma_Pure | Pragma_Pure_05 | Pragma_Pure_Function | Pragma_Queuing_Policy | Pragma_Relative_Deadline | Pragma_Remote_Call_Interface | Pragma_Remote_Types | Pragma_Restricted_Run_Time | Pragma_Ravenscar | Pragma_Reviewable | Pragma_Share_Generic | Pragma_Shared | Pragma_Shared_Passive | Pragma_Short_Circuit_And_Or | Pragma_Storage_Size | Pragma_Storage_Unit | Pragma_Static_Elaboration_Desired | Pragma_Stream_Convert | Pragma_Subtitle | Pragma_Suppress | Pragma_Suppress_All | Pragma_Suppress_Debug_Info | Pragma_Suppress_Exception_Locations | Pragma_Suppress_Initialization | Pragma_System_Name | Pragma_Task_Dispatching_Policy | Pragma_Task_Info | Pragma_Task_Name | Pragma_Task_Storage | Pragma_Thread_Local_Storage | Pragma_Time_Slice | Pragma_Title | Pragma_Unchecked_Union | Pragma_Unimplemented_Unit | Pragma_Universal_Aliasing | Pragma_Universal_Data | Pragma_Unmodified | Pragma_Unreferenced | Pragma_Unreferenced_Objects | Pragma_Unreserve_All_Interrupts | Pragma_Unsuppress | Pragma_Use_VADS_Size | Pragma_Volatile | Pragma_Volatile_Components | Pragma_Weak_External | Pragma_Validity_Checks => null; -------------------- -- Unknown_Pragma -- -------------------- -- Should be impossible, since we excluded this case earlier on when Unknown_Pragma => raise Program_Error; end case; return Pragma_Node; -------------------- -- Error Handling -- -------------------- exception when Error_Resync => return Error; end Prag;
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