toString method
A string representation of this object.
Some classes have a default textual representation,
often paired with a static parse function (like int.parse).
These classes will provide the textual representation as
their string representation.
Other classes have no meaningful textual representation
that a program will care about.
Such classes will typically override toString to provide
useful information when inspecting the object,
mainly for debugging or logging.
Implementation
@override
String toString() {
if (isZero) return '0';
if (isNegative) {
// Correct even at Int128.min: negation wraps back to its own bit
// pattern, which Uint128 correctly reads as the magnitude 2^127.
final mag = (~_bits) + Uint128.one;
return '-${mag.toString()}';
}
return _bits.toString();
}