when<TResult extends Object?> method
TResult
when<TResult extends Object?>()
A switch
-like method, using callbacks.
As opposed to map
, this offers destructuring.
It is equivalent to doing:
switch (sealedClass) {
case Subclass(:final field):
return ...;
case Subclass2(:final field2):
return ...;
}
Implementation
@optionalTypeArgs TResult when<TResult extends Object?>(TResult Function( String to, String input, BigInt? value) $default,) {final _that = this;
switch (_that) {
case _CallCompat():
return $default(_that.to,_that.input,_that.value);}
}