fabrik_result

A minimal and lightweight result-handling toolkit for real-world Dart and Flutter apps.

This package provides:

A sealed Either<L, R> type to model success/failure without using try-catch
A Unit type to represent a typed void for functional-style APIs

Philosophy

fabrik_result is built for clarity, simplicity, and real usage in domain-driven apps.
It provides only what you need, making it extremely lightweight.

Installation

dart pub add fabrik_result

Usage

Either

Either<Failure, User> result = await getUser();

result.fold(
  (failure) => handleError(failure),
  (user) => handleSuccess(user),
);

Unit

Either<Failure, Unit> result = await save();

result.fold(
  (failure) => showError(failure),
  (_) => showSuccessToast(),
);