index.cpp

LL1通用语法分析器

/************************************************************************
                        Copyright IBMTC Written by Xinxi Wang
**************************************************************************/

#include "Index.h"
using namespace std;


Index::Index( )
{
}


/**
 * @return Variable
 */
Variable Index::getVariable ( ) const 
{
    return index.first;
}
 

/**
 * @return Terminal
 */
Terminal Index::getTerminal ( ) const 
{
    return index.second;
}


/**
 * @param  var
 * @param  term
 */
 Index::Index (const Variable& var, const Terminal& term )
{
    index.first = var;
    index.second = term;
}


/**
 * @return bool
 * @param  other
 */
bool Index::operator< (const Index& other ) const 
{
    string name1 = index.first.getName();
    string name2 = other.index.first.getName();

    if(name1 < name2)
        return true;
    else if(name1 > name2)
        return false;
    else {
        string term1 = index.second.getString();
        string term2 = other.index.second.getString();
        
        return term1 < term2;
    }
}