Function handleErrorAsResult

test/README.example.spec.ts:811–824

(
      self: Effected<Effect.Error<ErrorName> | E, R>,
    )

    const err = <E>(error: E): Result<never, E> => ({ kind: "err", error });

    const handleErrorAsResult = <R, E extends Effect, ErrorName extends string>(
      self: Effected<Effect.Error<ErrorName> | E, R>,
    ): Effected<E, Result<R, { error: ErrorName; message?: string }>> => {
      const isErrorEffect = (name: string | symbol): name is `error:${ErrorName}` => {
        if (typeof name === "symbol") return false;
        return name.startsWith("error:");
      };

      return self
        .andThen((value) => ok(value))
        .handle(isErrorEffect, (({ effect, terminate }: any, message: any) => {
          terminate(err({ error: effect.name.slice("error:".length), message }));
        }) as never) as Effected<E, Result<R, { error: ErrorName; message?: string }>>;
    };

    type TypeError = Effect.Error<"type">;
    const typeError: EffectFactory<TypeError> = error("type");