effect-io-ai

Package: effect
Module: Exit

Exit.filterFailure

Extracts the Failure variant from an Exit as a Result.

When to use

Use when composing Exit checks with Filter or other Result-based filtering APIs and you want the full Failure wrapper.

Details

Returns Result.succeed(failure) when the Exit is a Failure, or Result.fail(success) with the original Success otherwise.

Gotchas

This is not an Option accessor or an Effect failure. A failed extraction is represented as data in the Result failure channel.

Example (Filtering for failure)

import { Exit, Result } from "effect"

const exit = Exit.fail("err")
const result = Exit.filterFailure(exit)

console.log(Result.isSuccess(result)) // true

See

• filterSuccess for the inverse
• filterCause to extract the Cause directly

Signature

declare const filterFailure: <A, E>(self: Exit<A, E>) => Result.Result<Failure<never, E>, Success<A>>

Source

Since v4.0.0