public function testDivisionByZero()
{
$x = Rational::parse('1/2');
$y = Rational::parse('0');
$this->setExpectedException(DivisionByZeroException::class);
$z = Rational::div($x, $y);
}
/**
* convert data to a floating point number, if possible
*
*
* @param mixed $value (float, int, Rational)
* @throws SyntaxErrorException if the string cannot be parsed
* @retval float
*/
private static function toFloat($x)
{
if (is_float($x)) {
return $x;
}
if (is_int($x)) {
return $x;
}
if (is_string($x)) {
$r = Rational::parse($x);
return $r->p / $r->q;
}
throw new SyntaxErrorException();
}
