Either<L, R>.tryCatch constructor Null safety

Either<L, R>.tryCatch(R run(), L onError(Object o, StackTrace s))

Try to execute run. If no error occurs, then return Right. Otherwise return Left containing the result of onError.

Implementation

factory Either.tryCatch(
    R Function() run, L Function(Object o, StackTrace s) onError) {
  try {
    return Either.of(run());
  } catch (e, s) {
    return Either.left(onError(e, s));
  }
}