Mercurial > hg > CbC > CbC_gcc
view gcc/ada/scans.adb @ 111:04ced10e8804
gcc 7
| author | kono |
|---|---|
| date | Fri, 27 Oct 2017 22:46:09 +0900 |
| parents | |
| children | 84e7813d76e9 |
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------------------------------------------------------------------------------ -- -- -- GNAT COMPILER COMPONENTS -- -- -- -- S C A N S -- -- -- -- B o d y -- -- -- -- Copyright (C) 1992-2016, 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. -- -- -- -- As a special exception under Section 7 of GPL version 3, you are granted -- -- additional permissions described in the GCC Runtime Library Exception, -- -- version 3.1, as published by the Free Software Foundation. -- -- -- -- You should have received a copy of the GNU General Public License and -- -- a copy of the GCC Runtime Library Exception along with this program; -- -- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see -- -- <http://www.gnu.org/licenses/>. -- -- -- -- GNAT was originally developed by the GNAT team at New York University. -- -- Extensive contributions were provided by Ada Core Technologies Inc. -- -- -- ------------------------------------------------------------------------------ with Snames; use Snames; package body Scans is ----------------------------- -- Initialize_Ada_Keywords -- ----------------------------- procedure Initialize_Ada_Keywords is procedure Set_Reserved (N : Name_Id; T : Token_Type); pragma Inline (Set_Reserved); -- Set given name as a reserved word (T is the corresponding token) ------------------ -- Set_Reserved -- ------------------ procedure Set_Reserved (N : Name_Id; T : Token_Type) is begin -- Set up Token_Type values in Names table entries for reserved -- words. We use the Pos value of the Token_Type value. Note that -- Is_Keyword_Name relies on the fact that Token_Type'Val (0) is not -- a reserved word. Set_Name_Table_Byte (N, Token_Type'Pos (T)); end Set_Reserved; -- Start of processing for Initialize_Ada_Keywords begin -- Establish reserved words Set_Reserved (Name_Abort, Tok_Abort); Set_Reserved (Name_Abs, Tok_Abs); Set_Reserved (Name_Abstract, Tok_Abstract); Set_Reserved (Name_Accept, Tok_Accept); Set_Reserved (Name_Access, Tok_Access); Set_Reserved (Name_And, Tok_And); Set_Reserved (Name_Aliased, Tok_Aliased); Set_Reserved (Name_All, Tok_All); Set_Reserved (Name_Array, Tok_Array); Set_Reserved (Name_At, Tok_At); Set_Reserved (Name_Begin, Tok_Begin); Set_Reserved (Name_Body, Tok_Body); Set_Reserved (Name_Case, Tok_Case); Set_Reserved (Name_Constant, Tok_Constant); Set_Reserved (Name_Declare, Tok_Declare); Set_Reserved (Name_Delay, Tok_Delay); Set_Reserved (Name_Delta, Tok_Delta); Set_Reserved (Name_Digits, Tok_Digits); Set_Reserved (Name_Do, Tok_Do); Set_Reserved (Name_Else, Tok_Else); Set_Reserved (Name_Elsif, Tok_Elsif); Set_Reserved (Name_End, Tok_End); Set_Reserved (Name_Entry, Tok_Entry); Set_Reserved (Name_Exception, Tok_Exception); Set_Reserved (Name_Exit, Tok_Exit); Set_Reserved (Name_For, Tok_For); Set_Reserved (Name_Function, Tok_Function); Set_Reserved (Name_Generic, Tok_Generic); Set_Reserved (Name_Goto, Tok_Goto); Set_Reserved (Name_If, Tok_If); Set_Reserved (Name_In, Tok_In); Set_Reserved (Name_Is, Tok_Is); Set_Reserved (Name_Limited, Tok_Limited); Set_Reserved (Name_Loop, Tok_Loop); Set_Reserved (Name_Mod, Tok_Mod); Set_Reserved (Name_New, Tok_New); Set_Reserved (Name_Not, Tok_Not); Set_Reserved (Name_Null, Tok_Null); Set_Reserved (Name_Of, Tok_Of); Set_Reserved (Name_Or, Tok_Or); Set_Reserved (Name_Others, Tok_Others); Set_Reserved (Name_Out, Tok_Out); Set_Reserved (Name_Package, Tok_Package); Set_Reserved (Name_Pragma, Tok_Pragma); Set_Reserved (Name_Private, Tok_Private); Set_Reserved (Name_Procedure, Tok_Procedure); Set_Reserved (Name_Protected, Tok_Protected); Set_Reserved (Name_Raise, Tok_Raise); Set_Reserved (Name_Range, Tok_Range); Set_Reserved (Name_Record, Tok_Record); Set_Reserved (Name_Rem, Tok_Rem); Set_Reserved (Name_Renames, Tok_Renames); Set_Reserved (Name_Requeue, Tok_Requeue); Set_Reserved (Name_Return, Tok_Return); Set_Reserved (Name_Reverse, Tok_Reverse); Set_Reserved (Name_Select, Tok_Select); Set_Reserved (Name_Separate, Tok_Separate); Set_Reserved (Name_Subtype, Tok_Subtype); Set_Reserved (Name_Tagged, Tok_Tagged); Set_Reserved (Name_Task, Tok_Task); Set_Reserved (Name_Terminate, Tok_Terminate); Set_Reserved (Name_Then, Tok_Then); Set_Reserved (Name_Type, Tok_Type); Set_Reserved (Name_Until, Tok_Until); Set_Reserved (Name_Use, Tok_Use); Set_Reserved (Name_When, Tok_When); Set_Reserved (Name_While, Tok_While); Set_Reserved (Name_With, Tok_With); Set_Reserved (Name_Xor, Tok_Xor); -- Ada 2005 reserved words Set_Reserved (Name_Interface, Tok_Interface); Set_Reserved (Name_Overriding, Tok_Overriding); Set_Reserved (Name_Synchronized, Tok_Synchronized); -- Ada 2012 reserved words Set_Reserved (Name_Some, Tok_Some); end Initialize_Ada_Keywords; ------------------ -- Keyword_Name -- ------------------ function Keyword_Name (Token : Token_Type) return Name_Id is Tok : String := Token'Img; pragma Assert (Tok (1 .. 4) = "TOK_"); Name : String renames Tok (5 .. Tok'Last); begin -- Convert to lower case. We don't want to add a dependence on a -- general-purpose To_Lower routine, so we convert "by hand" here. -- All keywords use 7-bit ASCII letters only, so this works. for J in Name'Range loop pragma Assert (Name (J) in 'A' .. 'Z'); Name (J) := Character'Val (Character'Pos (Name (J)) + (Character'Pos ('a') - Character'Pos ('A'))); end loop; return Name_Find (Name); end Keyword_Name; ------------------------ -- Restore_Scan_State -- ------------------------ procedure Restore_Scan_State (Saved_State : Saved_Scan_State) is begin Scan_Ptr := Saved_State.Save_Scan_Ptr; Token := Saved_State.Save_Token; Token_Ptr := Saved_State.Save_Token_Ptr; Current_Line_Start := Saved_State.Save_Current_Line_Start; Start_Column := Saved_State.Save_Start_Column; Checksum := Saved_State.Save_Checksum; First_Non_Blank_Location := Saved_State.Save_First_Non_Blank_Location; Token_Node := Saved_State.Save_Token_Node; Token_Name := Saved_State.Save_Token_Name; Prev_Token := Saved_State.Save_Prev_Token; Prev_Token_Ptr := Saved_State.Save_Prev_Token_Ptr; end Restore_Scan_State; --------------------- -- Save_Scan_State -- --------------------- procedure Save_Scan_State (Saved_State : out Saved_Scan_State) is begin Saved_State.Save_Scan_Ptr := Scan_Ptr; Saved_State.Save_Token := Token; Saved_State.Save_Token_Ptr := Token_Ptr; Saved_State.Save_Current_Line_Start := Current_Line_Start; Saved_State.Save_Start_Column := Start_Column; Saved_State.Save_Checksum := Checksum; Saved_State.Save_First_Non_Blank_Location := First_Non_Blank_Location; Saved_State.Save_Token_Node := Token_Node; Saved_State.Save_Token_Name := Token_Name; Saved_State.Save_Prev_Token := Prev_Token; Saved_State.Save_Prev_Token_Ptr := Prev_Token_Ptr; end Save_Scan_State; end Scans;