terminal.cpp

LL1通用语法分析器

/************************************************************************
                        Copyright IBMTC Written by Xinxi Wang
**************************************************************************/
#include <iostream>
#include "Terminal.h"
using namespace std;


Terminal::Terminal()
{
}


Terminal::Terminal (const Terminal &t)
{
    term = t.term;
}


/**
 * @param  v
 */
 Terminal::Terminal (string v )  : term (v)
{

}


/**
 * @return 标记类型
 */
Type Terminal::getType ( ) const 
{
    return TERMINAL;
}


/**
 * @return string
 */
string Terminal::getString ( ) const 
{
    return term;
}


/**
 * @return bool
 * @param  other
 */
bool Terminal::operator== (const Token& other ) const 
{
    if(other.getType() != getType())
        return false;
    
    const Terminal & t =  dynamic_cast<const Terminal &>(other);
    return t.getString() == term;
}


/**
 * @return 是否小于另一个标记
 * @param  other
 */
bool Terminal::operator< (const Token& other ) const
{
    if(getType() < other.getType())
        return true;
    else if(getType() > other.getType())
        return false;
    
    const Terminal & t =  dynamic_cast<const Terminal &>(other);
    return term < t.term;

}


void Terminal::print () const
{
    cout << term;
}


/**
 * 拷贝
 */
Token *Terminal::clone() const
{
    return new Terminal(*this);
}


/**
 */
Terminal::~Terminal ( )
{

}