effect-io-ai

Package: effect
Module: Layer

Layer.succeed

Constructs a layer that provides a single service from an already available value.

When to use

Use when you need a Layer that provides a service from an already constructed implementation without effectful acquisition.

Example (Creating a layer from a service implementation)

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

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

const DatabaseLive = Layer.succeed(Database, {
  query: Effect.fn("Database.query")((sql: string) => Effect.succeed(`Query result: ${sql}`))
})

See

• sync for constructing layers from lazy values

Signature

declare const succeed: { <I, S>(service: Context.Key<I, S>): (resource: S) => Layer<I>; <I, S>(service: Context.Key<I, S>, resource: Types.NoInfer<S>): Layer<I>; }

Source

Since v2.0.0