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-------------------------------------------------------------------------------
--
-- Copyright (C) 1999 Christoph Karl Walter Grein
--
-- This file is part of the OpenToken package.
--
-- The OpenToken package is free software; you can redistribute it and/or
-- modify it under the terms of the GNU General Public License as published
-- by the Free Software Foundation; either version 2, or (at your option)
-- any later version. The OpenToken package 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 the OpenToken
-- package; see file GPL.txt. If not, write to the Free Software Foundation,
-- 59 Temple Place - Suite 330, Boston, MA 02111-1307, 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.
--
-- Maintainer: Christoph K. W. Grein (Christ-Usch.Grein@T-Online.de)
--
-- Update History:
--
-- $Log: opentoken-recognizer-based_integer_java_style.adb,v $
-- Revision 1.3 2000/08/12 23:57:18 Ted
-- Changed some calls to dynamic dispatching to work around Gnat 3.13p bug
--
-- Revision 1.2 1999/12/27 19:55:59 Ted
-- fix file contents to work w/ new hierarchy
--
-- Revision 1.1 1999/12/27 17:11:32 Ted
-- renamed everything to new hierarchy
--
-- Revision 1.1 1999/08/17 03:07:26 Ted
-- Initial Version
--
-- 1.0 - 26 June 1999 First release
-------------------------------------------------------------------------------
-------------------------------------------------------------------------------
-- This package implements a token recognizer for an Java based integer literal.
-------------------------------------------------------------------------------
package body Opentoken.Recognizer.Based_Integer_Java_Style is
----------------------------------------------------------------------------
-- This procedure will be called when analysis on a new candidate string
-- is started. The Token needs to clear its state (if any).
----------------------------------------------------------------------------
procedure Clear (The_Token: in out Instance) is
begin
-- Changed to dynamicly dispatch to work around gnat 3.13p bug
Extended_Digits.Clear (Extended_Digits.Instance'Class(The_Token.Numeral_Recognizer));
The_Token.State := Base_0;
end Clear;
----------------------------------------------------------------------------
-- This procedure will be called to perform further analysis on a token
-- based on the given next character.
----------------------------------------------------------------------------
procedure Analyze (The_Token: in out Instance;
Next_Char: in Character;
Verdict : out Analysis_Verdict) is
begin
case The_Token.State is
when Base_0 =>
if Next_Char = '0' then
Verdict := So_Far_So_Good;
The_Token.State := Base_X;
The_Token.Numeral_Recognizer := Extended_Digits.Get (Allow_Underscores => False, For_Base => 8);
else
Verdict := Failed;
The_Token.State := Done;
end if;
when Base_X =>
if Next_Char = 'X' or Next_Char = 'x' then
Verdict := So_Far_So_Good;
The_Token.State := Numeral;
The_Token.Numeral_Recognizer := Extended_Digits.Get (Allow_Underscores => False, For_Base => 16);
else
-- Changed to dynamicly dispatch to work around gnat 3.13p bug
Extended_Digits.Analyze (Extended_Digits.Instance'Class(The_Token.Numeral_Recognizer), Next_Char, Verdict);
if Verdict = Matches then
The_Token.State := Numeral;
else
Verdict := Failed;
The_Token.State := Done;
end if;
end if;
when Numeral =>
-- Changed to dynamicly dispatch to work around gnat 3.13p bug
Extended_Digits.Analyze (Extended_Digits.Instance'Class(The_Token.Numeral_Recognizer), Next_Char, Verdict);
if Verdict = Matches then
The_Token.State := Numeral;
else
Verdict := Failed;
The_Token.State := Done;
end if;
when Done =>
-- We shouldn't get called from here.
Verdict := Failed;
end case;
end Analyze;
----------------------------------------------------------------------------
-- This procedure will be called to create a Based Integer token
----------------------------------------------------------------------------
function Get return Instance is
begin
return (Report => True,
Numeral_Recognizer => Extended_Digits.Get (Allow_Underscores => False, For_Base => 16),
State => Base_0);
end Get;
end Opentoken.Recognizer.Based_Integer_Java_Style;
|
