Scope.fork — API — Hyperlink

Scope.forkconsteffect/Scope.ts:439

(
  scope: Scope,
  finalizerStrategy?: "sequential" | "parallel"
): Effect<Closeable>

Creates a closeable child scope registered with a parent scope.

Details

Closing the parent closes the child with the same exit value, and closing the child detaches it from the parent. The optional finalizer strategy configures the child scope and defaults to "sequential" when omitted.

Example (Creating a child scope)

import { Console, Effect, Exit, Scope } from "effect"

const nestedScopes = Effect.gen(function*() {
  const parentScope = yield* Scope.make("sequential")

  // Add finalizer to parent
  yield* Scope.addFinalizer(parentScope, Console.log("Parent cleanup"))

  // Create child scope
  const childScope = yield* Scope.fork(parentScope, "parallel")

  // Add finalizer to child
  yield* Scope.addFinalizer(childScope, Console.log("Child cleanup"))

  // Close child first, then parent
  yield* Scope.close(childScope, Exit.void)
  yield* Scope.close(parentScope, Exit.void)
})

combinators

Source effect/Scope.ts:4394 lines

export const fork: (
  scope: Scope,
  finalizerStrategy?: "sequential" | "parallel"
) => Effect<Closeable> = effect.scopeFork