src/token.cpp


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#include "token.h"

#include "number.h"
#include <bu/formatter.h>
#include <bu/string.h>

Token::Token() :
    eType( tUninitialized ),
    sVal( 0 )
{
}

Token::Token( Type eType ) :
    eType( eType ),
    sVal( 0 )
{
}

Token::Token( Type eType, Bu::String *s ) :
    eType( eType ),
    sVal( s )
{
}

Token::Token( Type eType, Number *n ) :
    eType( eType ),
    nVal( n )
{
}

Token::Token( const Token &rSrc ) :
    eType( rSrc.eType ),
    sVal( rSrc.sVal )
{
    Token &rMod = const_cast<Token &>(rSrc);
    rMod.sVal = 0;
}

Token::~Token()
{
    switch( eType )
    {
        case tNumber:
            delete nVal;
            break;

        case tVariable:
        case tCommand:
        case tString:
            delete sVal;
            break;

        default:
            break;
    }
}

Token &Token::operator=( const Token &rhs )
{
    switch( eType )
    {
        case tNumber:
            delete nVal;
            break;

        case tVariable:
        case tCommand:
        case tString:
            delete sVal;
            break;

        default:
            break;
    }
    eType = rhs.eType;
    sVal = rhs.sVal;

    Token &rMod = const_cast<Token &>(rhs);
    rMod.sVal = 0;

    return *this;
}

Bu::Formatter &operator<<( Bu::Formatter &f, Token::Type eType )
{
    switch( eType )
    {
        case Token::tNumber:        return f << "num";
        case Token::tVariable:      return f << "var";
        case Token::tCommand:       return f << "cmd";
        case Token::tPlus:          return f << "+";
        case Token::tMinus:         return f << "-";
        case Token::tDivide:        return f << "/";
        case Token::tMultiply:      return f << "*";
        case Token::tModulus:       return f << "%";
        case Token::tOpenParen:     return f << "(";
        case Token::tCloseParen:    return f << ")";
        case Token::tEquals:        return f << "=";
        case Token::tString:        return f << "str";
        case Token::tEndOfLine:     return f << "eol";
        case Token::tEndOfInput:    return f << "eoi";
        case Token::tNegate:        return f << "neg";

        default:                    return f << "???";
    }
}