ceil method
Rounds this BigRational towards positive infinity and returns the result as a BigRational.
Returns a new BigRational representing the ceiling of this BigRational.
Implementation
BigRational ceil(toBigInt) {
final BigInt divmod = _truncate;
final BigInt remind = _remainder;
BigInt ceil;
if (remind == _zero || divmod.isNegative) {
ceil = divmod;
} else {
ceil = divmod + _one;
}
return BigRational._(ceil, _one);
}