Function isFailReason

packages/effect/src/internal/core.ts:354–356

(
  self: Cause.Reason<E>
)

/** @internal */
export const isFailReason = <E>(
  self: Cause.Reason<E>
): self is Cause.Fail<E> => self._tag === "Fail"

/** @internal */
export const isDieReason = <E>(self: Cause.Reason<E>): self is Cause.Die => self._tag === "Die"