Range<T> constructor
Range<T>(
{ - Bound<T>? lowerBound,
- Bound<T>? upperBound,
})
Implementation
Range({
Bound<T>? lowerBound,
Bound<T>? upperBound,
}) : lowerBound = LowerBound.from(lowerBound),
upperBound = UpperBound.from(upperBound) {
assert(() {
final _lowerBound = LowerBound.from(lowerBound);
final _upperBound = UpperBound.from(upperBound);
if (_lowerBound.isFinite && _upperBound.isFinite) {
return comparator(_upperBound.value!, _lowerBound.value!) >= 0;
} else {
return true;
}
}(), 'the upper bound must be more or equal then the lower bound');
empty = _isEmpty();
}