Token
TokenEvalContext::evalDivide(const Token& lexpr, const Token& rexpr) const
{
Token left = evalToken(lexpr);
Token right = evalToken(rexpr);
if (left.isInt()) {
int value = left.intValue();
if (value == 0)
throw DivisionByZeroException();
if (right.isInt())
return Token::newInt(left.srcpos(),
left.bitwidth(), value / right.intValue());
else if (right.isFloat())
return Token(left.srcpos(),
kFloat, double(value) / right.floatValue());
else if (right.isRational())
return Token(left.srcpos(),
kRational, Rational(value, 1) / right.rationalValue());
else
throw BadExpressionException(fromInt(__LINE__));
}
else if (left.isFloat()) {
double value = left.floatValue();
if (value == 0)
throw DivisionByZeroException();
if (right.isInt())
return Token(left.srcpos(),
kFloat, value / double(right.intValue()));
else if (right.isFloat())
return Token(left.srcpos(),
kFloat, value / right.floatValue());
else if (right.isRational())
return Token(left.srcpos(),
kFloat, value / right.rationalValue().toFloat());
else
throw BadExpressionException(fromInt(__LINE__));
}
else if (left.isRational()) {
Rational value = left.rationalValue();
if (value.numerator() == 0)
throw DivisionByZeroException();
if (right.isInt())
return Token(left.srcpos(),
kRational, value / Rational(right.intValue(), 1));
else if (right.isFloat())
return Token(left.srcpos(),
kFloat, value.toFloat() / right.floatValue());
else if (right.isRational())
return Token(left.srcpos(),
kRational, value / right.rationalValue());
else
throw BadExpressionException(fromInt(__LINE__));
}
throw BadExpressionException(fromInt(__LINE__));
}
Token
TokenEvalContext::evalMinus(const Token& lexpr, const Token& rexpr) const
{
Token left = evalToken(lexpr);
Token right = evalToken(rexpr);
if (left.isInt()) {
int value = left.intValue();
if (right.isInt())
return Token::newInt(left.srcpos(),
left.bitwidth(), value - right.intValue());
else if (right.isFloat())
return Token(left.srcpos(),
kFloat, double(value) - right.floatValue());
else if (right.isRational())
return Token(left.srcpos(),
kRational, Rational(value, 1) - right.rationalValue());
else
throw BadExpressionException(fromInt(__LINE__));
}
else if (left.isFloat()) {
double value = left.floatValue();
if (right.isInt())
return Token(left.srcpos(),
kFloat, value - double(right.intValue()));
else if (right.isFloat())
return Token(left.srcpos(),
kFloat, value - right.floatValue());
else if (right.isRational())
return Token(left.srcpos(),
kFloat, value - right.rationalValue().toFloat());
else
throw BadExpressionException(fromInt(__LINE__));
}
else if (left.isRational()) {
Rational value = left.rationalValue();
if (right.isInt())
return Token(left.srcpos(),
kRational, value - Rational(right.intValue(), 1));
else if (right.isFloat())
return Token(left.srcpos(),
kFloat, value.toFloat() - right.floatValue());
else if (right.isRational())
return Token(left.srcpos(),
kRational, value - right.rationalValue());
else
throw BadExpressionException(fromInt(__LINE__));
}
throw BadExpressionException(fromInt(__LINE__));
}
