Scanner.h 3.13 KB
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/*****************************************************************************
*
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* Copyright (c) 2000 - 2015, Lawrence Livermore National Security, LLC
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* Produced at the Lawrence Livermore National Laboratory
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* LLNL-CODE-442911
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* All rights reserved.
*
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* This file is  part of VisIt. For  details, see https://visit.llnl.gov/.  The
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* full copyright notice is contained in the file COPYRIGHT located at the root
* of the VisIt distribution or at http://www.llnl.gov/visit/copyright.html.
*
* Redistribution  and  use  in  source  and  binary  forms,  with  or  without
* modification, are permitted provided that the following conditions are met:
*
*  - Redistributions of  source code must  retain the above  copyright notice,
*    this list of conditions and the disclaimer below.
*  - Redistributions in binary form must reproduce the above copyright notice,
*    this  list of  conditions  and  the  disclaimer (as noted below)  in  the
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*    documentation and/or other materials provided with the distribution.
*  - Neither the name of  the LLNS/LLNL nor the names of  its contributors may
*    be used to endorse or promote products derived from this software without
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*    specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT  HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR  IMPLIED WARRANTIES, INCLUDING,  BUT NOT  LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND  FITNESS FOR A PARTICULAR  PURPOSE
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* ARE  DISCLAIMED. IN  NO EVENT  SHALL LAWRENCE  LIVERMORE NATIONAL  SECURITY,
* LLC, THE  U.S.  DEPARTMENT OF  ENERGY  OR  CONTRIBUTORS BE  LIABLE  FOR  ANY
* DIRECT,  INDIRECT,   INCIDENTAL,   SPECIAL,   EXEMPLARY,  OR   CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT  LIMITED TO, PROCUREMENT OF  SUBSTITUTE GOODS OR
* SERVICES; LOSS OF  USE, DATA, OR PROFITS; OR  BUSINESS INTERRUPTION) HOWEVER
* CAUSED  AND  ON  ANY  THEORY  OF  LIABILITY,  WHETHER  IN  CONTRACT,  STRICT
* LIABILITY, OR TORT  (INCLUDING NEGLIGENCE OR OTHERWISE)  ARISING IN ANY  WAY
* OUT OF THE  USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
* DAMAGE.
*
*****************************************************************************/

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#ifndef SCANNER_H
#define SCANNER_H
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#include <parser_exports.h>
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#include <string.h>
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#include <visitstream.h>
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#include <string>

#include "Token.h"

// ****************************************************************************
//  Class:  Scanner
//
//  Purpose:
//    A table-driven scanner for the VisIt expression language.
//
//  Note: State transition diagram is in the doc files states.jpg/states.dia.
//
//  Programmer:  Jeremy Meredith
//  Creation:    April  2, 2002
//
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//  Modifications:
//    Jeremy Meredith, Thu Nov 11 15:36:55 PST 2004
//    Refactored to allow other kinds of scanners.  This class's old
//    functionality moved to ExprScanner.
//
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//    Brad Whitlock, Tue Jan 4 14:24:35 PST 2005
//    Moved ctor, dtor definitions into the C file.
//
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// ****************************************************************************
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class PARSER_API Scanner
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{
  public:
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    Scanner();
    virtual ~Scanner();
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    virtual void   SetInput(const std::string &) = 0;
    virtual Token *ScanOneToken() = 0;
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};

#endif