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 (alter == 0) return degree.toString();
if (alter == -1) return 'b$degree';
if (alter == 1) return '#$degree';
if (alter == -2) return 'bb$degree';
if (alter == 2) return '##$degree';
return '$degree${alter > 0 ? '+$alter' : alter}';
}