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/* This file is part of the FaCT++ DL reasoner
Copyright (C) 2003-2015 Dmitry Tsarkov and The University of Manchester
Copyright (C) 2015-2016 Dmitry Tsarkov
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef TLEXEME_H
#define TLEXEME_H
#include "grammar.h"
#include "tNamedEntry.h"
/// Lexeme (smallest lexical element) in a syntax tree
class TLexeme
{
private: // members
/// Lexeme's Token
Token token;
/// pointer to information (for names)
union
{
TNamedEntry* pNE;
unsigned int data;
} value;
public: // interface
/// default c'tor for pointers
explicit TLexeme ( Token tok, TNamedEntry* p = NULL ) : token(tok) { value.pNE = p; }
/// default c'tor for numbers
TLexeme ( Token tok, unsigned int val ) : token(tok) { value.data = val; }
/// Copy c'tor
TLexeme ( const TLexeme& lex ) : token(lex.token), value(lex.value) {}
/// Assignment
TLexeme& operator = ( const TLexeme& lex )
{
token = lex.token;
value = lex.value;
return *this;
}
// access
/// get Token of given Lexeme
Token getToken ( void ) const { return token; }
/// get name pointer of given lexeme
TNamedEntry* getNE ( void ) const { return value.pNE; }
/// get name pointer of given lexeme
const char* getName ( void ) const { return value.pNE->getName(); }
/// get data value of given lexeme
unsigned int getData ( void ) const { return value.data; }
// comparison
/// full lexeme comparison (equality)
bool operator == ( const TLexeme& lex ) const { return ( token == lex.token && value.data == lex.value.data ); }
/// full lexeme comparison (inequality)
bool operator != ( const TLexeme& lex ) const { return !( *this == lex ); }
/// just token comparison (equality)
bool operator == ( Token tok ) const { return ( token == tok ); }
/// just token comparison (inequality)
bool operator != ( Token tok ) const { return ( token != tok ); }
}; // TLexeme
#endif
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