mapOrNull<TResult extends Object?> method

  1. @optionalTypeArgs
TResult? mapOrNull<TResult extends Object?>({
  1. TResult? success(
    1. FxSuccess<T> value
    )?,
  2. TResult? failure(
    1. FxFailure<T> value
    )?,
})

A variant of map that fallback to returning null.

It is equivalent to doing:

switch (sealedClass) {
  case final Subclass value:
    return ...;
  case _:
    return null;
}

Implementation

@optionalTypeArgs TResult? mapOrNull<TResult extends Object?>({TResult? Function( FxSuccess<T> value)?  success,TResult? Function( FxFailure<T> value)?  failure,}){
final _that = this;
switch (_that) {
case FxSuccess() when success != null:
return success(_that);case FxFailure() when failure != null:
return failure(_that);case _:
  return null;

}
}