-------------------------------------------------------- ------------------------ -- -- -- OCARINA COMPONENTS -- -- -- -- O C A R I N A . A A D L . L E X E R -- -- -- -- S p e c -- -- -- -- Copyright (C) 2004-2006, GET-Telecom Paris. -- -- -- -- Ocarina is free software; you can redistribute it and/or modify -- -- it under terms of the GNU General Public License as published by the -- -- Free Software Foundation; either version 2, or (at your option) any -- -- later version. Ocarina is distributed in the hope that it will be -- -- useful, but WITHOUT 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 Ocarina; see file COPYING. -- -- If not, write to the Free Software Foundation, 51 Franklin Street, Fifth -- -- Floor, Boston, MA 02111-1301, USA. -- -- -- -- As a special exception, if other files instantiate generics from this -- -- unit, or you link this unit with other files to produce an executable, -- -- this unit does not by itself cause the resulting executable to be -- -- covered by the GNU General Public License. This exception does not -- -- however invalidate any other reasons why the executable file might be -- -- covered by the GNU Public License. -- -- -- -- Ocarina is maintained by the Ocarina team -- -- (ocarina-users@listes.enst.fr) -- -- -- ------------------------------------------------------------------------------ -- This package contains the lexical analyzer routines. This is used -- by the parser for scanning AADL source files. This package is -- conformant to the AADL v1.0 issued on 2004-09 with Types; use Types; with Locations; use Locations; with Ocarina.AADL.Tokens; use Ocarina.AADL.Tokens; package Ocarina.AADL.Lexer is --------------------------------------------------- -- Global variables updated by the token scanner -- --------------------------------------------------- Token : Token_Type; Token_Location : Location; Token_Name : Name_Id; -- for T_Identifier (Lower case) Token_Display_Name : Name_Id; -- for T_Identifier (Carbon copy) String_Literal_Value : Name_Id; -- for T_String Raw_Text_Value : Name_Id; -- for T_Raw_Text function Current_Token_Image return String; -- Return an image of the current token function Process (Source_Name : Name_Id) return Boolean; -- Load the file into the lexer procedure Save_Lexer (State : out Location); pragma Inline (Save_Lexer); -- Save the current location in order for the parser to go back to -- this position if necessary. procedure Restore_Lexer (State : Location); pragma Inline (Restore_Lexer); -- Go back to the location specified in the 'State' parameter procedure Scan_Token; -- Scan token and update the global variables declared above. procedure Scan_Raw_Text (T : Token_Type); -- Scan all text until token T is reached. Scanned text is saved in name -- table, use Raw_Text_Value to retrieve text contents function End_Of_File return Boolean; -- Return TRUE if there is no more useful data in file or EOF is reached procedure Skip_Tokens (Delimiter : Token_Type; Include_Delimiter : Boolean := True); -- Skip tokens until we find Delimiter -- This procedure verifies that skipped tokens are well embraced procedure Skip_Tokens (Delimiters : Token_List_Type); -- Same as above, with each token T in given list, calls Skip_Tokens (T) end Ocarina.AADL.Lexer;