effect-io-ai

Package: effect
Module: Fiber

Fiber.join

Joins a fiber, blocking until it completes. If the fiber succeeds, returns its value. If it fails, the error is propagated.

When to use

Use when you need a forked fiber’s failure to fail the current Effect because that fiber is part of the current workflow.

Gotchas

Joining a failed fiber propagates the fiber’s Cause. Use await when you need to inspect the Exit instead of failing.

Example (Joining a fiber)

import { Effect, Fiber } from "effect"

const program = Effect.gen(function*() {
  const fiber = yield* Effect.forkChild(Effect.succeed(42))
  const result = yield* Fiber.join(fiber)
  console.log(result) // 42
})

See

• await for inspecting the fiber outcome as an Exit

Signature

declare const join: <A, E>(self: Fiber<A, E>) => Effect<A, E>

Source

Since v2.0.0