effect-io-ai

Package: effect
Module: Cause

Cause.findErrorOption

Returns the first typed error value E from a cause wrapped in Option.some, or Option.none if no Fail reason exists.

When to use

Use when you need the first typed error value from a Cause as an Option, discarding the original cause.

Example (Extracting an error as Option)

import { Cause, Option } from "effect"

const some = Cause.findErrorOption(Cause.fail("error"))
console.log(Option.isSome(some)) // true

const none = Cause.findErrorOption(Cause.die("defect"))
console.log(Option.isNone(none)) // true

See

• findError — Result-based variant

Signature

declare const findErrorOption: <E>(input: Cause<E>) => Option<E>

Source

Since v4.0.0