mapOrNull<TResult extends Object?> method

  1. @optionalTypeArgs
TResult? mapOrNull<TResult extends Object?>({
  1. TResult? withAccessToken(
    1. UpdatePasswordRequestWithAccessToken value
    )?,
  2. TResult? withFreshAccessToken(
    1. UpdatePasswordRequestWithFreshAccessToken value
    )?,
  3. TResult? withEmail(
    1. UpdatePasswordRequestWithEmail value
    )?,
  4. TResult? withPhoneNumber(
    1. UpdatePasswordRequestWithPhoneNumber 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(UpdatePasswordRequestWithAccessToken value)?
      withAccessToken,
  TResult? Function(UpdatePasswordRequestWithFreshAccessToken value)?
      withFreshAccessToken,
  TResult? Function(UpdatePasswordRequestWithEmail value)? withEmail,
  TResult? Function(UpdatePasswordRequestWithPhoneNumber value)?
      withPhoneNumber,
}) {
  final _that = this;
  switch (_that) {
    case UpdatePasswordRequestWithAccessToken() when withAccessToken != null:
      return withAccessToken(_that);
    case UpdatePasswordRequestWithFreshAccessToken()
        when withFreshAccessToken != null:
      return withFreshAccessToken(_that);
    case UpdatePasswordRequestWithEmail() when withEmail != null:
      return withEmail(_that);
    case UpdatePasswordRequestWithPhoneNumber() when withPhoneNumber != null:
      return withPhoneNumber(_that);
    case _:
      return null;
  }
}