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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.ads,v $
-- 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 1.2 1999/09/02 03:16:43 Ted
-- Add comments
--
-- Revision 1.1 1999/08/17 03:07:26 Christoph Grein
-- Initial Version
--
-------------------------------------------------------------------------------
with Opentoken.Recognizer.Extended_Digits;
-------------------------------------------------------------------------------
-- This package implements a token recognizer for a Java style based integer.
-- Such an integer consists of a base indication, followed by a sequence of
-- extended digits.
-- A base indication is either a leading 0 for an octal integer or leading 0x
-- for a hexadecimal integer.
-- An extended digit is either a decimal digit or a character in the range
-- 'a'..'f' in any letter case. The extended digit must be smaller than the
-- base.
-- When this recognizer and the one for integers are used together in the same
-- syntax, note that the integer recognizer must be created with leading zero
-- disallowed or a string like 07 is ambiguous.
-------------------------------------------------------------------------------
package Opentoken.Recognizer.Based_Integer_Java_Style is
type Instance is new Opentoken.Recognizer.Instance with private;
----------------------------------------------------------------------------
-- This procedure will be called to create a Based Integer token.
----------------------------------------------------------------------------
function Get return Instance;
private
type State_ID is (Base_0, Base_X, Numeral, Done);
type Instance is new Opentoken.Recognizer.Instance with record
-- The finite state machine state
Numeral_Recognizer: Extended_Digits.Instance;
State : State_ID := Base_0;
end record;
----------------------------------------------------------------------------
-- 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);
----------------------------------------------------------------------------
-- 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);
end Opentoken.Recognizer.Based_Integer_Java_Style;
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