multiple_result

Releases

1. ▸▾5.3.014 Mar 2026

   Error.getOrThrow() now correctly passes <S, E> to SuccessResultNotFoundException , so toString() shows the actual types instead of dynamic .

   Bug Fixes

   • Error.getOrThrow() now correctly passes <S, E> to SuccessResultNotFoundException, so toString() shows the actual types instead of dynamic.

   New Features

   • Result.tryCatch(action, onError) — static factory that wraps a potentially-throwing synchronous computation.
   • getOrElse(orElse) — returns the success value or a fallback computed from the error.
   • onSuccess(action) / onError(action) — side-effect tap methods that execute an action without transforming the result, returning this for chaining.
   • flatMapError(mapper) — symmetric counterpart to flatMap for the error channel.
   • recover(mapper) — alias for flatMapError.
   • swap() — converts Success to Error and vice versa.
   • AsyncResult<S, E> — zero-cost Future<Result<S, E>> wrapper via Dart extension types, with a full mirrored API (mapSuccess, mapError, map, flatMap, flatMapAsync, flatMapError, swap, onSuccess, onError, getOrThrow, getOrElse, tryGetSuccess, tryGetError, when, isSuccess, isError, and tryCatch).
   • AsyncResultOf<S, E> typedef alias for AsyncResult<S, E>.

   Full Changelog: v5.2.0...v5.3.0

   Open source →