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/*****************************************************************************
*
* Copyright (c) 2000 - 2010, Lawrence Livermore National Security, LLC
* Produced at the Lawrence Livermore National Laboratory
* LLNL-CODE-400124
* All rights reserved.
*
* This file is part of VisIt. For details, see https://visit.llnl.gov/. The
* 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
* 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
* 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
* 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
* 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.
*
*****************************************************************************/
#ifndef TOKEN_H
#define TOKEN_H
#include <parser_exports.h>
#include <string>
#include <stdlib.h>
#include <Pos.h>
#define EOF_TOKEN_ID 256
/*
enum TokenType {
TT_NoToken = 0,
TT_EOF = EOF_TOKEN_ID,
... your tokens here ...
};
*/
PARSER_API std::string GetTokenTypeString(int t);
// ****************************************************************************
// Class: Token
//
// Purpose:
// Base class of all tokens. Inside a parse tree, tokens are
// contained in TokenParseTreeNode objects, which will often be
// leaf elements of a parse tree.
//
// Programmer: Jeremy Meredith
// Creation: April 5, 2002
//
// Modifications:
// Sean Ahern, Thu Apr 18 11:25:16 PDT 2002
// Made the base class ExprParseTreeNode so that I can separate out the
// code that talks to the engine.
//
// Sean Ahern, Wed Oct 16 16:41:59 PDT 2002
// Moved the engine communication code to a separate set of classes
// that are owned by the viewer. I may collapse ExprParseTreeNode again.
//
// Jeremy Meredith, Wed Jun 9 10:20:08 PDT 2004
// Added GetValue to BoolConst.
//
// Jeremy Meredith, Wed Nov 24 12:11:33 PST 2004
// Major refactoring. First, moved all VisIt Expression specific tokens
// to a new file (ExprToken). Second, Token no longer derives from
// the parse tree node class -- instead, there is a specific parse tree
// node type (TokenParseTreeNode) that contains a token. This avoids
// virtual (diamond) inheritance for tokens.
//
// ****************************************************************************
class PARSER_API Token
{
public:
Token(const Pos &p, int t) : pos(p), type(t) { }
virtual ~Token() { }
int GetType() const { return type; }
const Pos &GetPos() const {return pos;}
Pos &GetPos() {return pos;}
virtual void PrintNode(ostream &o) { o << "Unknown Token\n"; }
protected:
Pos pos;
int type;
};
class PARSER_API EndOfInput : public Token
{
public:
EndOfInput(const Pos &p) : Token(p, EOF_TOKEN_ID) { }
virtual ~EndOfInput() { }
virtual void PrintNode(ostream &o) { o << "<<EOF>>\n"; }
};
#endif
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