108 lines
3.1 KiB
C++
108 lines
3.1 KiB
C++
/*************************************************************************
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*
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* OpenOffice.org - a multi-platform office productivity suite
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*
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* $RCSfile: tkp.hxx,v $
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*
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* $Revision: 1.2 $
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*
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* last change: $Author: rt $ $Date: 2005-09-07 18:40:35 $
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*
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* The Contents of this file are made available subject to
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* the terms of GNU Lesser General Public License Version 2.1.
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*
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*
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* GNU Lesser General Public License Version 2.1
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* =============================================
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* Copyright 2005 by Sun Microsystems, Inc.
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* 901 San Antonio Road, Palo Alto, CA 94303, USA
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License version 2.1, as published by the Free Software Foundation.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*
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************************************************************************/
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#ifndef ADC_TKP_HXX
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#define ADC_TKP_HXX
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// USED SERVICES
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// BASE CLASSES
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// COMPONENTS
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class CharacterSource;
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class TkpContext;
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// PARAMETRS
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/** This is the interface for parser classes, which get a sequence of tokens from
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a text.
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Start() starts to parse the text from the given i_rSource.
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GetNextToken() returns a Token on the heap as long as there are
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still characters in the text left. This can be checked by
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HasMore().
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The algorithms for parsing tokens from the text are an issue of
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the derived classes.
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*/
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#if 0
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/**
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Parsing can be interrupted for a different source by PushSource().
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The parsing before interruption is continued after PopSource().
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*/
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#endif // 0
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class TokenParser
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{
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public:
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// LIFECYCLE
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TokenParser();
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virtual ~TokenParser() {}
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// OPERATIONS
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/** Start parsing a character source. Any previously parsed sources
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are discarded.
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*/
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virtual void Start(
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CharacterSource &
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i_rSource );
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/** @short Gets the next identifiable token out of the
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source code.
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*/
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void GetNextToken();
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/// @return true, if there are more tokens to parse.
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bool HasMore() const { return bHasMore; }
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private:
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void InitSource(
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CharacterSource &
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i_rSource );
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virtual void SetStartContext() = 0;
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virtual void SetCurrentContext(
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TkpContext & io_rContext ) = 0;
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virtual TkpContext &
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CurrentContext() = 0;
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// DATA
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CharacterSource * pChars;
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bool bHasMore;
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};
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#endif
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