effect-io-ai

Package: effect
Module: Layer

Layer.effectContext

Constructs a layer from an effect that produces all services in a Context.

When to use

Use when you need a Layer that effectfully constructs a Context with multiple services.

Details

This allows you to create a Layer from an effectful computation that returns multiple services. The Effect is executed in the scope of the layer.

Example (Creating a layer from an effectful context)

import { Context, Effect, Layer } from "effect"

class Database extends Context.Service<
  Database,
  { readonly query: (sql: string) => Effect.Effect<string> }
>()("Database") {}

const layer = Layer.effectContext(
  Effect.succeed(Context.make(Database, {
    query: (sql: string) => Effect.succeed(`Query: ${sql}`)
  }))
)

See

• effect for effectfully providing a single service

Signature

declare const effectContext: <A, E, R>(effect: Effect<Context.Context<A>, E, R>) => Layer<A, E, Exclude<R, Scope.Scope>>

Source

Since v2.0.0