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Viewing / Editing File: Layer.ts

/**
 * A `Layer<ROut, E, RIn>` describes how to build one or more services in your
 * application. Services can be injected into effects via
 * `Effect.provideService`. Effects can require services via `Effect.service`.
 *
 * Layer can be thought of as recipes for producing bundles of services, given
 * their dependencies (other services).
 *
 * Construction of services can be effectful and utilize resources that must be
 * acquired and safely released when the services are done being utilized.
 *
 * By default layers are shared, meaning that if the same layer is used twice
 * the layer will only be allocated a single time.
 *
 * Because of their excellent composition properties, layers are the idiomatic
 * way in Effect-TS to create services that depend on other services.
 *
 * @since 2.0.0
 */
import type * as Cause from "./Cause.js"
import type * as Clock from "./Clock.js"
import type { ConfigProvider } from "./ConfigProvider.js"
import * as Context from "./Context.js"
import type * as Effect from "./Effect.js"
import type * as Exit from "./Exit.js"
import type { FiberRef } from "./FiberRef.js"
import { dual, type LazyArg } from "./Function.js"
import { clockTag } from "./internal/clock.js"
import * as core from "./internal/core.js"
import * as defaultServices from "./internal/defaultServices.js"
import * as fiberRuntime from "./internal/fiberRuntime.js"
import * as internal from "./internal/layer.js"
import * as circularLayer from "./internal/layer/circular.js"
import * as query from "./internal/query.js"
import { randomTag } from "./internal/random.js"
import type { LogLevel } from "./LogLevel.js"
import type * as Option from "./Option.js"
import type { Pipeable } from "./Pipeable.js"
import type * as Random from "./Random.js"
import type * as Request from "./Request.js"
import type * as Runtime from "./Runtime.js"
import type * as Schedule from "./Schedule.js"
import * as Scheduler from "./Scheduler.js"
import type * as Scope from "./Scope.js"
import type * as Stream from "./Stream.js"
import type * as Tracer from "./Tracer.js"
import type * as Types from "./Types.js"

/**
 * @since 2.0.0
 * @category symbols
 */
export const LayerTypeId: unique symbol = internal.LayerTypeId

/**
 * @since 2.0.0
 * @category symbols
 */
export type LayerTypeId = typeof LayerTypeId

/**
 * @since 2.0.0
 * @category models
 */
export interface Layer<in ROut, out E = never, out RIn = never> extends Layer.Variance<ROut, E, RIn>, Pipeable {}

/**
 * @since 2.0.0
 */
export declare namespace Layer {
 /**
 * @since 2.0.0
 * @category models
 */
 export interface Variance<in ROut, out E, out RIn> {
 readonly [LayerTypeId]: {
 readonly _ROut: Types.Contravariant<ROut>
 readonly _E: Types.Covariant<E>
 readonly _RIn: Types.Covariant<RIn>
 }
 }
 /**
 * @since 3.9.0
 * @category type-level
 */
 export interface Any {
 readonly [LayerTypeId]: {
 readonly _ROut: Types.Contravariant<never>
 readonly _E: Types.Covariant<any>
 readonly _RIn: Types.Covariant<any>
 }
 }
 /**
 * @since 2.0.0
 * @category type-level
 */
 export type Context<T extends Any> = [T] extends [Layer<infer _ROut, infer _E, infer _RIn>] ? _RIn
 : never
 /**
 * @since 2.0.0
 * @category type-level
 */
 export type Error<T extends Any> = [T] extends [Layer<infer _ROut, infer _E, infer _RIn>] ? _E
 : never
 /**
 * @since 2.0.0
 * @category type-level
 */
 export type Success<T extends Any> = [T] extends [Layer<infer _ROut, infer _E, infer _RIn>] ? _ROut
 : never
}

/**
 * @since 2.0.0
 * @category symbols
 */
export const MemoMapTypeId: unique symbol = internal.MemoMapTypeId

/**
 * @since 2.0.0
 * @category symbols
 */
export type MemoMapTypeId = typeof MemoMapTypeId

/**
 * @since 2.0.0
 * @category models
 */
export interface MemoMap {
  readonly [MemoMapTypeId]: MemoMapTypeId

/** @internal */
 readonly getOrElseMemoize: <RIn, E, ROut>(
 layer: Layer<ROut, E, RIn>,
 scope: Scope.Scope
 ) => Effect.Effect<Context.Context<ROut>, E, RIn>
}

/**
 * @since 3.13.0
 * @category models
 */
export interface CurrentMemoMap {
  readonly _: unique symbol
}

/**
 * @since 3.13.0
 * @category models
 */
export const CurrentMemoMap: Context.Reference<CurrentMemoMap, MemoMap> = internal.CurrentMemoMap

/**
 * Returns `true` if the specified value is a `Layer`, `false` otherwise.
 *
 * @since 2.0.0
 * @category getters
 */
export const isLayer: (u: unknown) => u is Layer<unknown, unknown, unknown> = internal.isLayer

/**
 * Returns `true` if the specified `Layer` is a fresh version that will not be
 * shared, `false` otherwise.
 *
 * @since 2.0.0
 * @category getters
 */
export const isFresh: <RIn, E, ROut>(self: Layer<ROut, E, RIn>) => boolean = internal.isFresh

/**
 * @since 3.3.0
 * @category tracing
 */
export const annotateLogs: {
 /**
 * @since 3.3.0
 * @category tracing
 */
 (key: string, value: unknown): <A, E, R>(self: Layer<A, E, R>) => Layer<A, E, R>
 /**
 * @since 3.3.0
 * @category tracing
 */
 (values: Record<string, unknown>): <A, E, R>(self: Layer<A, E, R>) => Layer<A, E, R>
 /**
 * @since 3.3.0
 * @category tracing
 */
 <A, E, R>(self: Layer<A, E, R>, key: string, value: unknown): Layer<A, E, R>
 /**
 * @since 3.3.0
 * @category tracing
 */
 <A, E, R>(self: Layer<A, E, R>, values: Record<string, unknown>): Layer<A, E, R>
} = internal.annotateLogs

/**
 * @since 3.3.0
 * @category tracing
 */
export const annotateSpans: {
 /**
 * @since 3.3.0
 * @category tracing
 */
 (key: string, value: unknown): <A, E, R>(self: Layer<A, E, R>) => Layer<A, E, R>
 /**
 * @since 3.3.0
 * @category tracing
 */
 (values: Record<string, unknown>): <A, E, R>(self: Layer<A, E, R>) => Layer<A, E, R>
 /**
 * @since 3.3.0
 * @category tracing
 */
 <A, E, R>(self: Layer<A, E, R>, key: string, value: unknown): Layer<A, E, R>
 /**
 * @since 3.3.0
 * @category tracing
 */
 <A, E, R>(self: Layer<A, E, R>, values: Record<string, unknown>): Layer<A, E, R>
} = internal.annotateSpans

/**
 * Builds a layer into a scoped value.
 *
 * @since 2.0.0
 * @category destructors
 */
export const build: <RIn, E, ROut>(
 self: Layer<ROut, E, RIn>
) => Effect.Effect<Context.Context<ROut>, E, Scope.Scope | RIn> = internal.build

/**
 * Builds a layer into an `Effect` value. Any resources associated with this
 * layer will be released when the specified scope is closed unless their scope
 * has been extended. This allows building layers where the lifetime of some of
 * the services output by the layer exceed the lifetime of the effect the
 * layer is provided to.
 *
 * @since 2.0.0
 * @category destructors
 */
export const buildWithScope: {
 /**
 * Builds a layer into an `Effect` value. Any resources associated with this
 * layer will be released when the specified scope is closed unless their scope
 * has been extended. This allows building layers where the lifetime of some of
 * the services output by the layer exceed the lifetime of the effect the
 * layer is provided to.
 *
 * @since 2.0.0
 * @category destructors
 */
 (scope: Scope.Scope): <RIn, E, ROut>(self: Layer<ROut, E, RIn>) => Effect.Effect<Context.Context<ROut>, E, RIn>
 /**
 * Builds a layer into an `Effect` value. Any resources associated with this
 * layer will be released when the specified scope is closed unless their scope
 * has been extended. This allows building layers where the lifetime of some of
 * the services output by the layer exceed the lifetime of the effect the
 * layer is provided to.
 *
 * @since 2.0.0
 * @category destructors
 */
 <RIn, E, ROut>(self: Layer<ROut, E, RIn>, scope: Scope.Scope): Effect.Effect<Context.Context<ROut>, E, RIn>
} = internal.buildWithScope

/**
 * Recovers from all errors.
 *
 * @since 2.0.0
 * @category error handling
 */
export const catchAll: {
 /**
 * Recovers from all errors.
 *
 * @since 2.0.0
 * @category error handling
 */
 <E, RIn2, E2, ROut2>(onError: (error: E) => Layer<ROut2, E2, RIn2>): <RIn, ROut>(self: Layer<ROut, E, RIn>) => Layer<ROut & ROut2, E2, RIn2 | RIn>
 /**
 * Recovers from all errors.
 *
 * @since 2.0.0
 * @category error handling
 */
 <RIn, E, ROut, RIn2, E2, ROut2>(self: Layer<ROut, E, RIn>, onError: (error: E) => Layer<ROut2, E2, RIn2>): Layer<ROut & ROut2, E2, RIn | RIn2>
} = internal.catchAll

/**
 * Recovers from all errors.
 *
 * @since 2.0.0
 * @category error handling
 */
export const catchAllCause: {
 /**
 * Recovers from all errors.
 *
 * @since 2.0.0
 * @category error handling
 */
 <E, RIn2, E2, ROut2>(onError: (cause: Cause.Cause<E>) => Layer<ROut2, E2, RIn2>): <RIn, ROut>(self: Layer<ROut, E, RIn>) => Layer<ROut & ROut2, E2, RIn2 | RIn>
 /**
 * Recovers from all errors.
 *
 * @since 2.0.0
 * @category error handling
 */
 <RIn, E, ROut, RIn2, E2, ROut22>(
 self: Layer<ROut, E, RIn>,
 onError: (cause: Cause.Cause<E>) => Layer<ROut22, E2, RIn2>
 ): Layer<ROut & ROut22, E2, RIn | RIn2>
} = internal.catchAllCause

/**
 * Constructs a `Layer` that passes along the specified context as an
 * output.
 *
 * @since 2.0.0
 * @category constructors
 */
export const context: <R>() => Layer<R, never, R> = internal.context

/**
 * Constructs a layer that dies with the specified defect.
 *
 * @since 2.0.0
 * @category constructors
 */
export const die: (defect: unknown) => Layer<unknown> = internal.die

/**
 * Constructs a layer that dies with the specified defect.
 *
 * @since 2.0.0
 * @category constructors
 */
export const dieSync: (evaluate: LazyArg<unknown>) => Layer<unknown> = internal.dieSync

/**
 * Replaces the layer's output with `never` and includes the layer only for its
 * side-effects.
 *
 * @since 2.0.0
 * @category mapping
 */
export const discard: <RIn, E, ROut>(self: Layer<ROut, E, RIn>) => Layer<never, E, RIn> = internal.discard

/**
 * Constructs a layer from the specified effect.
 *
 * @since 2.0.0
 * @category constructors
 */
export const effect: {
 /**
 * Constructs a layer from the specified effect.
 *
 * @since 2.0.0
 * @category constructors
 */
 <I, S>(tag: Context.Tag<I, S>): <E, R>(effect: Effect.Effect<Types.NoInfer<S>, E, R>) => Layer<I, E, R>
 /**
 * Constructs a layer from the specified effect.
 *
 * @since 2.0.0
 * @category constructors
 */
 <I, S, E, R>(tag: Context.Tag<I, S>, effect: Effect.Effect<Types.NoInfer<S>, E, R>): Layer<I, E, R>
} = internal.fromEffect

/**
 * Constructs a layer from the specified effect, discarding its output.
 *
 * @since 2.0.0
 * @category constructors
 */
export const effectDiscard: <X, E, R>(effect: Effect.Effect<X, E, R>) => Layer<never, E, R> = internal.fromEffectDiscard

/**
 * Constructs a layer from the specified effect, which must return one or more
 * services.
 *
 * @since 2.0.0
 * @category constructors
 */
export const effectContext: <A, E, R>(effect: Effect.Effect<Context.Context<A>, E, R>) => Layer<A, E, R> =
 internal.fromEffectContext

/**
 * A Layer that constructs an empty Context.
 *
 * @since 2.0.0
 * @category constructors
 */
export const empty: Layer<never> = internal.empty

/**
 * Extends the scope of this layer, returning a new layer that when provided
 * to an effect will not immediately release its associated resources when
 * that effect completes execution but instead when the scope the resulting
 * effect depends on is closed.
 *
 * @since 2.0.0
 * @category utils
 */
export const extendScope: <RIn, E, ROut>(self: Layer<ROut, E, RIn>) => Layer<ROut, E, Scope.Scope | RIn> =
 internal.extendScope

/**
 * Constructs a layer that fails with the specified error.
 *
 * @since 2.0.0
 * @category constructors
 */
export const fail: <E>(error: E) => Layer<unknown, E> = internal.fail

/**
 * Constructs a layer that fails with the specified error.
 *
 * @since 2.0.0
 * @category constructors
 */
export const failSync: <E>(evaluate: LazyArg<E>) => Layer<unknown, E> = internal.failSync

/**
 * Constructs a layer that fails with the specified cause.
 *
 * @since 2.0.0
 * @category constructors
 */
export const failCause: <E>(cause: Cause.Cause<E>) => Layer<unknown, E> = internal.failCause

/**
 * Constructs a layer that fails with the specified cause.
 *
 * @since 2.0.0
 * @category constructors
 */
export const failCauseSync: <E>(evaluate: LazyArg<Cause.Cause<E>>) => Layer<unknown, E> = internal.failCauseSync

/**
 * Constructs a layer dynamically based on the output of this layer.
 *
 * @since 2.0.0
 * @category sequencing
 */
export const flatMap: {
 /**
 * Constructs a layer dynamically based on the output of this layer.
 *
 * @since 2.0.0
 * @category sequencing
 */
 <A, A2, E2, R2>(f: (context: Context.Context<A>) => Layer<A2, E2, R2>): <E, R>(self: Layer<A, E, R>) => Layer<A2, E2 | E, R2 | R>
 /**
 * Constructs a layer dynamically based on the output of this layer.
 *
 * @since 2.0.0
 * @category sequencing
 */
 <A, E, R, A2, E2, R2>(
 self: Layer<A, E, R>,
 f: (context: Context.Context<A>) => Layer<A2, E2, R2>
 ): Layer<A2, E | E2, R | R2>
} = internal.flatMap

/**
 * Flattens layers nested in the context of an effect.
 *
 * @since 2.0.0
 * @category sequencing
 */
export const flatten: {
 /**
 * Flattens layers nested in the context of an effect.
 *
 * @since 2.0.0
 * @category sequencing
 */
 <I, A, E2, R2>(tag: Context.Tag<I, Layer<A, E2, R2>>): <E, R>(self: Layer<I, E, R>) => Layer<A, E2 | E, R2 | R>
 /**
 * Flattens layers nested in the context of an effect.
 *
 * @since 2.0.0
 * @category sequencing
 */
 <I, E, R, A, E2, R2>(self: Layer<I, E, R>, tag: Context.Tag<I, Layer<A, E2, R2>>): Layer<A, E | E2, R | R2>
} = internal.flatten

/**
 * Creates a fresh version of this layer that will not be shared.
 *
 * @since 2.0.0
 * @category utils
 */
export const fresh: <A, E, R>(self: Layer<A, E, R>) => Layer<A, E, R> = internal.fresh

/**
 * @since 3.17.0
 * @category Testing
 */
export type PartialEffectful<A extends object> = Types.Simplify<
 & {
 [
 K in keyof A as A[K] extends
 | Effect.Effect<any, any, any>
 | Stream.Stream<any, any, any>
 | ((...args: any) => Effect.Effect<any, any, any> | Stream.Stream<any, any, any>) ? K
 : never
 ]?: A[K]
 }
 & {
 [
 K in keyof A as A[K] extends
 | Effect.Effect<any, any, any>
 | Stream.Stream<any, any, any>
 | ((...args: any) => Effect.Effect<any, any, any> | Stream.Stream<any, any, any>) ? never
 : K
 ]: A[K]
 }
>

/**
 * Creates a mock layer for testing purposes. You can provide a partial
 * implementation of the service, and any methods not provided will
 * throw an `UnimplementedError` defect when called.
 *
 * **Example**
 *
 * ```ts
 * import { Context, Effect, Layer } from "effect"
 *
 * class MyService extends Context.Tag("MyService")<
 * MyService,
 * {
 * one: Effect.Effect<number>
 * two(): Effect.Effect<number>
 * }
 * >() {}
 *
 * const MyServiceTest = Layer.mock(MyService, {
 * two: () => Effect.succeed(2)
 * })
 * ```
 *
 * @since 3.17.0
 * @category Testing
 */
export const mock: {
 /**
 * Creates a mock layer for testing purposes. You can provide a partial
 * implementation of the service, and any methods not provided will
 * throw an `UnimplementedError` defect when called.
 *
 * **Example**
 *
 * ```ts
 * import { Context, Effect, Layer } from "effect"
 *
 * class MyService extends Context.Tag("MyService")<
 * MyService,
 * {
 * one: Effect.Effect<number>
 * two(): Effect.Effect<number>
 * }
 * >() {}
 *
 * const MyServiceTest = Layer.mock(MyService, {
 * two: () => Effect.succeed(2)
 * })
 * ```
 *
 * @since 3.17.0
 * @category Testing
 */
 <I, S extends object>(tag: Context.Tag<I, S>): (service: PartialEffectful<S>) => Layer
 /**
 * Creates a mock layer for testing purposes. You can provide a partial
 * implementation of the service, and any methods not provided will
 * throw an `UnimplementedError` defect when called.
 *
 * **Example**
 *
 * ```ts
 * import { Context, Effect, Layer } from "effect"
 *
 * class MyService extends Context.Tag("MyService")<
 * MyService,
 * {
 * one: Effect.Effect<number>
 * two(): Effect.Effect<number>
 * }
 * >() {}
 *
 * const MyServiceTest = Layer.mock(MyService, {
 * two: () => Effect.succeed(2)
 * })
 * ```
 *
 * @since 3.17.0
 * @category Testing
 */
 <I, S extends object>(tag: Context.Tag<I, S>, service: PartialEffectful<S>): Layer
} = internal.mock

const fromFunction: <I1, S1, I2, S2>(
 tagA: Context.Tag<I1, S1>,
 tagB: Context.Tag<I2, S2>,
 f: (a: Types.NoInfer<S1>) => Types.NoInfer<S2>
) => Layer<I2, never, I1> = internal.fromFunction

export {
  /**
   * Constructs a layer from the context using the specified function.
   *
   * @since 2.0.0
   * @category constructors
   */
  fromFunction as function
}

/**
 * Builds this layer and uses it until it is interrupted. This is useful when
 * your entire application is a layer, such as an HTTP server.
 *
 * @since 2.0.0
 * @category conversions
 */
export const launch: <RIn, E, ROut>(self: Layer<ROut, E, RIn>) => Effect.Effect<never, E, RIn> = internal.launch

/**
 * Returns a new layer whose output is mapped by the specified function.
 *
 * @since 2.0.0
 * @category mapping
 */
export const map: {
 /**
 * Returns a new layer whose output is mapped by the specified function.
 *
 * @since 2.0.0
 * @category mapping
 */
 <A, B>(f: (context: Context.Context<A>) => Context.Context): <E, R>(self: Layer<A, E, R>) => Layer<B, E, R>
 /**
 * Returns a new layer whose output is mapped by the specified function.
 *
 * @since 2.0.0
 * @category mapping
 */
 <A, E, R, B>(
 self: Layer<A, E, R>,
 f: (context: Context.Context<A>) => Context.Context
 ): Layer<B, E, R>
} = internal.map

/**
 * Returns a layer with its error channel mapped using the specified function.
 *
 * @since 2.0.0
 * @category mapping
 */
export const mapError: {
 /**
 * Returns a layer with its error channel mapped using the specified function.
 *
 * @since 2.0.0
 * @category mapping
 */
 <E, E2>(f: (error: E) => E2): <A, R>(self: Layer<A, E, R>) => Layer<A, E2, R>
 /**
 * Returns a layer with its error channel mapped using the specified function.
 *
 * @since 2.0.0
 * @category mapping
 */
 <A, E, R, E2>(self: Layer<A, E, R>, f: (error: E) => E2): Layer<A, E2, R>
} = internal.mapError

/**
 * Feeds the error or output services of this layer into the input of either
 * the specified `failure` or `success` layers, resulting in a new layer with
 * the inputs of this layer, and the error or outputs of the specified layer.
 *
 * @since 2.0.0
 * @category folding
 */
export const match: {
 /**
 * Feeds the error or output services of this layer into the input of either
 * the specified `failure` or `success` layers, resulting in a new layer with
 * the inputs of this layer, and the error or outputs of the specified layer.
 *
 * @since 2.0.0
 * @category folding
 */
 <E, A2, E2, R2, A, A3, E3, R3>(
 options: {
 readonly onFailure: (error: E) => Layer<A2, E2, R2>
 readonly onSuccess: (context: Context.Context<A>) => Layer<A3, E3, R3>
 }
 ): <R>(self: Layer<A, E, R>) => Layer<A2 & A3, E2 | E3, R2 | R3 | R>
 /**
 * Feeds the error or output services of this layer into the input of either
 * the specified `failure` or `success` layers, resulting in a new layer with
 * the inputs of this layer, and the error or outputs of the specified layer.
 *
 * @since 2.0.0
 * @category folding
 */
 <A, E, R, A2, E2, R2, A3, E3, R3>(
 self: Layer<A, E, R>,
 options: {
 readonly onFailure: (error: E) => Layer<A2, E2, R2>
 readonly onSuccess: (context: Context.Context<A>) => Layer<A3, E3, R3>
 }
 ): Layer<A2 & A3, E2 | E3, R | R2 | R3>
} = internal.match

/**
 * Feeds the error or output services of this layer into the input of either
 * the specified `failure` or `success` layers, resulting in a new layer with
 * the inputs of this layer, and the error or outputs of the specified layer.
 *
 * @since 2.0.0
 * @category folding
 */
export const matchCause: {
 /**
 * Feeds the error or output services of this layer into the input of either
 * the specified `failure` or `success` layers, resulting in a new layer with
 * the inputs of this layer, and the error or outputs of the specified layer.
 *
 * @since 2.0.0
 * @category folding
 */
 <E, A2, E2, R2, A, A3, E3, R3>(
 options: {
 readonly onFailure: (cause: Cause.Cause<E>) => Layer<A2, E2, R2>
 readonly onSuccess: (context: Context.Context<A>) => Layer<A3, E3, R3>
 }
 ): <R>(self: Layer<A, E, R>) => Layer<A2 & A3, E2 | E3, R2 | R3 | R>
 /**
 * Feeds the error or output services of this layer into the input of either
 * the specified `failure` or `success` layers, resulting in a new layer with
 * the inputs of this layer, and the error or outputs of the specified layer.
 *
 * @since 2.0.0
 * @category folding
 */
 <A, E, R, A2, E2, R2, A3, E3, R3>(
 self: Layer<A, E, R>,
 options: {
 readonly onFailure: (cause: Cause.Cause<E>) => Layer<A2, E2, R2>
 readonly onSuccess: (context: Context.Context<A>) => Layer<A3, E3, R3>
 }
 ): Layer<A2 & A3, E2 | E3, R | R2 | R3>
} = internal.matchCause

/**
 * Returns a scoped effect that, if evaluated, will return the lazily computed
 * result of this layer.
 *
 * @since 2.0.0
 * @category utils
 */
export const memoize: <RIn, E, ROut>(
 self: Layer<ROut, E, RIn>
) => Effect.Effect<Layer<ROut, E, RIn>, never, Scope.Scope> = internal.memoize

/**
 * Merges this layer with the specified layer concurrently, producing a new layer with combined input and output types.
 *
 * @since 2.0.0
 * @category zipping
 */
export const merge: {
 /**
 * Merges this layer with the specified layer concurrently, producing a new layer with combined input and output types.
 *
 * @since 2.0.0
 * @category zipping
 */
 <RIn2, E2, ROut2>(that: Layer<ROut2, E2, RIn2>): <RIn, E1, ROut>(self: Layer<ROut, E1, RIn>) => Layer<ROut2 | ROut, E2 | E1, RIn2 | RIn>
 /**
 * Merges this layer with the specified layer concurrently, producing a new layer with combined input and output types.
 *
 * @since 2.0.0
 * @category zipping
 */
 <RIn, E1, ROut, RIn2, E2, ROut2>(self: Layer<ROut, E1, RIn>, that: Layer<ROut2, E2, RIn2>): Layer<ROut | ROut2, E1 | E2, RIn | RIn2>
} = internal.merge

/**
 * Combines all the provided layers concurrently, creating a new layer with merged input, error, and output types.
 *
 * @since 2.0.0
 * @category zipping
 */
export const mergeAll: <Layers extends readonly [Layer<never, any, any>, ...Array<Layer<never, any, any>>]>(
 ...layers: Layers
) => Layer<
 { [k in keyof Layers]: Layer.Success<Layers[k]> }[number],
 { [k in keyof Layers]: Layer.Error<Layers[k]> }[number],
 { [k in keyof Layers]: Layer.Context<Layers[k]> }[number]
> = internal.mergeAll

/**
 * Translates effect failure into death of the fiber, making all failures
 * unchecked and not a part of the type of the layer.
 *
 * @since 2.0.0
 * @category error handling
 */
export const orDie: <A, E, R>(self: Layer<A, E, R>) => Layer<A, never, R> = internal.orDie

/**
 * Executes this layer and returns its output, if it succeeds, but otherwise
 * executes the specified layer.
 *
 * @since 2.0.0
 * @category error handling
 */
export const orElse: {
 /**
 * Executes this layer and returns its output, if it succeeds, but otherwise
 * executes the specified layer.
 *
 * @since 2.0.0
 * @category error handling
 */
 <A2, E2, R2>(that: LazyArg<Layer<A2, E2, R2>>): <A, E, R>(self: Layer<A, E, R>) => Layer<A & A2, E2 | E, R2 | R>
 /**
 * Executes this layer and returns its output, if it succeeds, but otherwise
 * executes the specified layer.
 *
 * @since 2.0.0
 * @category error handling
 */
 <A, E, R, A2, E2, R2>(self: Layer<A, E, R>, that: LazyArg<Layer<A2, E2, R2>>): Layer<A & A2, E | E2, R | R2>
} = internal.orElse

/**
 * Returns a new layer that produces the outputs of this layer but also
 * passes through the inputs.
 *
 * @since 2.0.0
 * @category utils
 */
export const passthrough: <RIn, E, ROut>(self: Layer<ROut, E, RIn>) => Layer<RIn | ROut, E, RIn> = internal.passthrough

/**
 * Projects out part of one of the services output by this layer using the
 * specified function.
 *
 * @since 2.0.0
 * @category utils
 */
export const project: {
 /**
 * Projects out part of one of the services output by this layer using the
 * specified function.
 *
 * @since 2.0.0
 * @category utils
 */
 <I1, S1, I2, S2>(
 tagA: Context.Tag<I1, S1>,
 tagB: Context.Tag<I2, S2>,
 f: (a: Types.NoInfer<S1>) => Types.NoInfer<S2>
 ): <RIn, E>(self: Layer<I1, E, RIn>) => Layer<I2, E, RIn>
 /**
 * Projects out part of one of the services output by this layer using the
 * specified function.
 *
 * @since 2.0.0
 * @category utils
 */
 <RIn, E, I1, S1, I2, S2>(
 self: Layer<I1, E, RIn>,
 tagA: Context.Tag<I1, S1>,
 tagB: Context.Tag<I2, S2>,
 f: (a: Types.NoInfer<S1>) => Types.NoInfer<S2>
 ): Layer<I2, E, RIn>
} = internal.project

/**
 * @since 2.0.0
 * @category utils
 */
export const locallyEffect: {
 /**
 * @since 2.0.0
 * @category utils
 */
 <RIn, E, ROut, RIn2, E2, ROut2>(
 f: (_: Effect.Effect<RIn, E, Context.Context<ROut>>) => Effect.Effect<RIn2, E2, Context.Context<ROut2>>
 ): (self: Layer<ROut, E, RIn>) => Layer<ROut2, E2, RIn2>
 /**
 * @since 2.0.0
 * @category utils
 */
 <RIn, E, ROut, RIn2, E2, ROut2>(
 self: Layer<ROut, E, RIn>,
 f: (_: Effect.Effect<RIn, E, Context.Context<ROut>>) => Effect.Effect<RIn2, E2, Context.Context<ROut2>>
 ): Layer<ROut2, E2, RIn2>
} = internal.locallyEffect

/**
 * @since 2.0.0
 * @category utils
 */
export const locally: {
 /**
 * @since 2.0.0
 * @category utils
 */
 <X>(ref: FiberRef<X>, value: X): <A, E, R>(self: Layer<A, E, R>) => Layer<A, E, R>
 /**
 * @since 2.0.0
 * @category utils
 */
 <A, E, R, X>(self: Layer<A, E, R>, ref: FiberRef<X>, value: X): Layer<A, E, R>
} = internal.fiberRefLocally

/**
 * @since 2.0.0
 * @category utils
 */
export const locallyWith: {
 /**
 * @since 2.0.0
 * @category utils
 */
 <X>(ref: FiberRef<X>, value: (_: X) => X): <A, E, R>(self: Layer<A, E, R>) => Layer<A, E, R>
 /**
 * @since 2.0.0
 * @category utils
 */
 <A, E, R, X>(self: Layer<A, E, R>, ref: FiberRef<X>, value: (_: X) => X): Layer<A, E, R>
} = internal.fiberRefLocallyWith

/**
 * @since 2.0.0
 * @category utils
 */
export const locallyScoped: <A>(self: FiberRef<A>, value: A) => Layer<never> = internal.fiberRefLocallyScoped

/**
 * @since 2.0.0
 * @category utils
 */
export const fiberRefLocallyScopedWith: <A>(self: FiberRef<A>, value: (_: A) => A) => Layer<never> =
 internal.fiberRefLocallyScopedWith

/**
 * Retries constructing this layer according to the specified schedule.
 *
 * @since 2.0.0
 * @category retrying
 */
export const retry: {
 /**
 * Retries constructing this layer according to the specified schedule.
 *
 * @since 2.0.0
 * @category retrying
 */
 <X, E, RIn2>(schedule: Schedule.Schedule<X, NoInfer<E>, RIn2>): <ROut, RIn>(self: Layer<ROut, E, RIn>) => Layer<ROut, E, RIn2 | RIn>
 /**
 * Retries constructing this layer according to the specified schedule.
 *
 * @since 2.0.0
 * @category retrying
 */
 <ROut, E, RIn, X, RIn2>(self: Layer<ROut, E, RIn>, schedule: Schedule.Schedule<X, E, RIn2>): Layer<ROut, E, RIn | RIn2>
} = internal.retry

/**
 * A layer that constructs a scope and closes it when the workflow the layer
 * is provided to completes execution, whether by success, failure, or
 * interruption. This can be used to close a scope when providing a layer to a
 * workflow.
 *
 * @since 2.0.0
 * @category constructors
 */
export const scope: Layer<Scope.Scope> = internal.scope

/**
 * Constructs a layer from the specified scoped effect.
 *
 * @since 2.0.0
 * @category constructors
 */
export const scoped: {
 /**
 * Constructs a layer from the specified scoped effect.
 *
 * @since 2.0.0
 * @category constructors
 */
 <I, S>(tag: Context.Tag<I, S>): <E, R>(effect: Effect.Effect<Types.NoInfer<S>, E, R>) => Layer<I, E, Exclude<R, Scope.Scope>>
 /**
 * Constructs a layer from the specified scoped effect.
 *
 * @since 2.0.0
 * @category constructors
 */
 <I, S, E, R>(tag: Context.Tag<I, S>, effect: Effect.Effect<Types.NoInfer<S>, E, R>): Layer<I, E, Exclude<R, Scope.Scope>>
} = internal.scoped

/**
 * Constructs a layer from the specified scoped effect.
 *
 * @since 2.0.0
 * @category constructors
 */
export const scopedDiscard: <X, E, R>(effect: Effect.Effect<X, E, R>) => Layer<never, E, Exclude<R, Scope.Scope>> =
 internal.scopedDiscard

/**
 * Constructs a layer from the specified scoped effect, which must return one
 * or more services.
 *
 * @since 2.0.0
 * @category constructors
 */
export const scopedContext: <A, E, R>(
 effect: Effect.Effect<Context.Context<A>, E, R>
) => Layer<A, E, Exclude<R, Scope.Scope>> = internal.scopedContext

/**
 * Constructs a layer that accesses and returns the specified service from the
 * context.
 *
 * @since 2.0.0
 * @category constructors
 */
export const service: <I, S>(tag: Context.Tag<I, S>) => Layer<I, never, I> = internal.service

/**
 * Constructs a layer from the specified value.
 *
 * @since 2.0.0
 * @category constructors
 */
export const succeed: {
 /**
 * Constructs a layer from the specified value.
 *
 * @since 2.0.0
 * @category constructors
 */
 <I, S>(tag: Context.Tag<I, S>): (resource: Types.NoInfer<S>) => Layer
 /**
 * Constructs a layer from the specified value.
 *
 * @since 2.0.0
 * @category constructors
 */
 <I, S>(tag: Context.Tag<I, S>, resource: Types.NoInfer<S>): Layer
} = internal.succeed

/**
 * Constructs a layer from the specified value, which must return one or more
 * services.
 *
 * @since 2.0.0
 * @category constructors
 */
export const succeedContext: <A>(context: Context.Context<A>) => Layer<A> = internal.succeedContext

/**
 * Lazily constructs a layer. This is useful to avoid infinite recursion when
 * creating layers that refer to themselves.
 *
 * @since 2.0.0
 * @category constructors
 */
export const suspend: <RIn, E, ROut>(evaluate: LazyArg<Layer<ROut, E, RIn>>) => Layer<ROut, E, RIn> = internal.suspend

/**
 * Lazily constructs a layer from the specified value.
 *
 * @since 2.0.0
 * @category constructors
 */
export const sync: {
 /**
 * Lazily constructs a layer from the specified value.
 *
 * @since 2.0.0
 * @category constructors
 */
 <I, S>(tag: Context.Tag<I, S>): (evaluate: LazyArg<Types.NoInfer<S>>) => Layer
 /**
 * Lazily constructs a layer from the specified value.
 *
 * @since 2.0.0
 * @category constructors
 */
 <I, S>(tag: Context.Tag<I, S>, evaluate: LazyArg<Types.NoInfer<S>>): Layer
} = internal.sync

/**
 * Lazily constructs a layer from the specified value, which must return one or more
 * services.
 *
 * @since 2.0.0
 * @category constructors
 */
export const syncContext: <A>(evaluate: LazyArg<Context.Context<A>>) => Layer<A> = internal.syncContext

/**
 * Performs the specified effect if this layer succeeds.
 *
 * @since 2.0.0
 * @category sequencing
 */
export const tap: {
 /**
 * Performs the specified effect if this layer succeeds.
 *
 * @since 2.0.0
 * @category sequencing
 */
 <ROut, XR extends ROut, RIn2, E2, X>(f: (context: Context.Context<XR>) => Effect.Effect<X, E2, RIn2>): <RIn, E>(self: Layer<ROut, E, RIn>) => Layer<ROut, E2 | E, RIn2 | RIn>
 /**
 * Performs the specified effect if this layer succeeds.
 *
 * @since 2.0.0
 * @category sequencing
 */
 <RIn, E, ROut, XR extends ROut, RIn2, E2, X>(
 self: Layer<ROut, E, RIn>,
 f: (context: Context.Context<XR>) => Effect.Effect<X, E2, RIn2>
 ): Layer<ROut, E | E2, RIn | RIn2>
} = internal.tap

/**
 * Performs the specified effect if this layer fails.
 *
 * @since 2.0.0
 * @category sequencing
 */
export const tapError: {
 /**
 * Performs the specified effect if this layer fails.
 *
 * @since 2.0.0
 * @category sequencing
 */
 <E, XE extends E, RIn2, E2, X>(f: (e: XE) => Effect.Effect<X, E2, RIn2>): <RIn, ROut>(self: Layer<ROut, E, RIn>) => Layer<ROut, E | E2, RIn2 | RIn>
 /**
 * Performs the specified effect if this layer fails.
 *
 * @since 2.0.0
 * @category sequencing
 */
 <RIn, E, XE extends E, ROut, RIn2, E2, X>(self: Layer<ROut, E, RIn>, f: (e: XE) => Effect.Effect<X, E2, RIn2>): Layer<ROut, E | E2, RIn | RIn2>
} = internal.tapError

/**
 * Performs the specified effect if this layer fails.
 *
 * @since 2.0.0
 * @category sequencing
 */
export const tapErrorCause: {
 /**
 * Performs the specified effect if this layer fails.
 *
 * @since 2.0.0
 * @category sequencing
 */
 <E, XE extends E, RIn2, E2, X>(f: (cause: Cause.Cause<XE>) => Effect.Effect<X, E2, RIn2>): <RIn, ROut>(self: Layer<ROut, E, RIn>) => Layer<ROut, E | E2, RIn2 | RIn>
 /**
 * Performs the specified effect if this layer fails.
 *
 * @since 2.0.0
 * @category sequencing
 */
 <RIn, E, XE extends E, ROut, RIn2, E2, X>(
 self: Layer<ROut, E, RIn>,
 f: (cause: Cause.Cause<XE>) => Effect.Effect<X, E2, RIn2>
 ): Layer<ROut, E | E2, RIn | RIn2>
} = internal.tapErrorCause

/**
 * Converts a layer that requires no services into a scoped runtime, which can
 * be used to execute effects.
 *
 * @since 2.0.0
 * @category conversions
 */
export const toRuntime: <RIn, E, ROut>(
 self: Layer<ROut, E, RIn>
) => Effect.Effect<Runtime.Runtime<ROut>, E, Scope.Scope | RIn> = internal.toRuntime

/**
 * Converts a layer that requires no services into a scoped runtime, which can
 * be used to execute effects.
 *
 * @since 2.0.0
 * @category conversions
 */
export const toRuntimeWithMemoMap: {
 /**
 * Converts a layer that requires no services into a scoped runtime, which can
 * be used to execute effects.
 *
 * @since 2.0.0
 * @category conversions
 */
 (memoMap: MemoMap): <RIn, E, ROut>(self: Layer<ROut, E, RIn>) => Effect.Effect<Runtime.Runtime<ROut>, E, Scope.Scope | RIn>
 /**
 * Converts a layer that requires no services into a scoped runtime, which can
 * be used to execute effects.
 *
 * @since 2.0.0
 * @category conversions
 */
 <RIn, E, ROut>(self: Layer<ROut, E, RIn>, memoMap: MemoMap): Effect.Effect<Runtime.Runtime<ROut>, E, Scope.Scope | RIn>
} = internal.toRuntimeWithMemoMap

/**
 * Feeds the output services of this builder into the input of the specified
 * builder, resulting in a new builder with the inputs of this builder as
 * well as any leftover inputs, and the outputs of the specified builder.
 *
 * @since 2.0.0
 * @category utils
 */
export const provide: {
 /**
 * Feeds the output services of this builder into the input of the specified
 * builder, resulting in a new builder with the inputs of this builder as
 * well as any leftover inputs, and the outputs of the specified builder.
 *
 * @since 2.0.0
 * @category utils
 */
 <RIn, E, ROut>(that: Layer<ROut, E, RIn>): <RIn2, E2, ROut2>(self: Layer<ROut2, E2, RIn2>) => Layer<ROut2, E | E2, RIn | Exclude<RIn2, ROut>>
 /**
 * Feeds the output services of this builder into the input of the specified
 * builder, resulting in a new builder with the inputs of this builder as
 * well as any leftover inputs, and the outputs of the specified builder.
 *
 * @since 2.0.0
 * @category utils
 */
 <const Layers extends readonly [Layer.Any, ...Array<Layer.Any>]>(that: Layers): <A, E, R>(
 self: Layer<A, E, R>
 ) => Layer<
 A,
 E | { [k in keyof Layers]: Layer.Error<Layers[k]> }[number],
 | { [k in keyof Layers]: Layer.Context<Layers[k]> }[number]
 | Exclude<R, { [k in keyof Layers]: Layer.Success<Layers[k]> }[number]>
 >
 /**
 * Feeds the output services of this builder into the input of the specified
 * builder, resulting in a new builder with the inputs of this builder as
 * well as any leftover inputs, and the outputs of the specified builder.
 *
 * @since 2.0.0
 * @category utils
 */
 <RIn2, E2, ROut2, RIn, E, ROut>(self: Layer<ROut2, E2, RIn2>, that: Layer<ROut, E, RIn>): Layer<ROut2, E | E2, RIn | Exclude<RIn2, ROut>>
 /**
 * Feeds the output services of this builder into the input of the specified
 * builder, resulting in a new builder with the inputs of this builder as
 * well as any leftover inputs, and the outputs of the specified builder.
 *
 * @since 2.0.0
 * @category utils
 */
 <A, E, R, const Layers extends readonly [Layer.Any, ...Array<Layer.Any>]>(self: Layer<A, E, R>, that: Layers): Layer<
 A,
 E | { [k in keyof Layers]: Layer.Error<Layers[k]> }[number],
 | { [k in keyof Layers]: Layer.Context<Layers[k]> }[number]
 | Exclude<R, { [k in keyof Layers]: Layer.Success<Layers[k]> }[number]>
 >
} = internal.provide

/**
 * Feeds the output services of this layer into the input of the specified
 * layer, resulting in a new layer with the inputs of this layer, and the
 * outputs of both layers.
 *
 * @since 2.0.0
 * @category utils
 */
export const provideMerge: {
 /**
 * Feeds the output services of this layer into the input of the specified
 * layer, resulting in a new layer with the inputs of this layer, and the
 * outputs of both layers.
 *
 * @since 2.0.0
 * @category utils
 */
 <RIn, E, ROut>(self: Layer<ROut, E, RIn>): <RIn2, E2, ROut2>(that: Layer<ROut2, E2, RIn2>) => Layer<ROut | ROut2, E | E2, RIn | Exclude<RIn2, ROut>>
 /**
 * Feeds the output services of this layer into the input of the specified
 * layer, resulting in a new layer with the inputs of this layer, and the
 * outputs of both layers.
 *
 * @since 2.0.0
 * @category utils
 */
 <RIn2, E2, ROut2, RIn, E, ROut>(that: Layer<ROut2, E2, RIn2>, self: Layer<ROut, E, RIn>): Layer<ROut2 | ROut, E2 | E, RIn | Exclude<RIn2, ROut>>
} = internal.provideMerge

/**
 * Combines this layer with the specified layer concurrently, creating a new layer with merged input types and
 * combined output types using the provided function.
 *
 * @since 2.0.0
 * @category zipping
 */
export const zipWith: {
 /**
 * Combines this layer with the specified layer concurrently, creating a new layer with merged input types and
 * combined output types using the provided function.
 *
 * @since 2.0.0
 * @category zipping
 */
 <B, E2, R2, A, C>(
 that: Layer<B, E2, R2>,
 f: (a: Context.Context<A>, b: Context.Context) => Context.Context<C>
 ): <E, R>(self: Layer<A, E, R>) => Layer<C, E2 | E, R2 | R>
 /**
 * Combines this layer with the specified layer concurrently, creating a new layer with merged input types and
 * combined output types using the provided function.
 *
 * @since 2.0.0
 * @category zipping
 */
 <A, E, R, B, E2, R2, C>(
 self: Layer<A, E, R>,
 that: Layer<B, E2, R2>,
 f: (a: Context.Context<A>, b: Context.Context) => Context.Context<C>
 ): Layer<C, E | E2, R | R2>
} = internal.zipWith

/**
 * @since 2.0.0
 * @category utils
 */
export const unwrapEffect: <A, E1, R1, E, R>(self: Effect.Effect<Layer<A, E1, R1>, E, R>) => Layer<A, E | E1, R | R1> =
 internal.unwrapEffect

/**
 * @since 2.0.0
 * @category utils
 */
export const unwrapScoped: <A, E1, R1, E, R>(
 self: Effect.Effect<Layer<A, E1, R1>, E, R>
) => Layer<A, E | E1, R1 | Exclude<R, Scope.Scope>> = internal.unwrapScoped

/**
 * @since 2.0.0
 * @category clock
 */
export const setClock: <A extends Clock.Clock>(clock: A) => Layer<never> = <A extends Clock.Clock>(
 clock: A
): Layer<never> =>
 scopedDiscard(
 fiberRuntime.fiberRefLocallyScopedWith(defaultServices.currentServices, Context.add(clockTag, clock))
 )

/**
 * Sets the current `ConfigProvider`.
 *
 * @since 2.0.0
 * @category config
 */
export const setConfigProvider: (configProvider: ConfigProvider) => Layer<never> = circularLayer.setConfigProvider

/**
 * Adds the provided span to the span stack.
 *
 * @since 2.0.0
 * @category tracing
 */
export const parentSpan: (span: Tracer.AnySpan) => Layer<Tracer.ParentSpan> = circularLayer.parentSpan

/**
 * @since 3.15.0
 * @category Random
 */
export const setRandom = <A extends Random.Random>(random: A): Layer<never> =>
 scopedDiscard(
 fiberRuntime.fiberRefLocallyScopedWith(defaultServices.currentServices, Context.add(randomTag, random))
 )

/**
 * @since 2.0.0
 * @category requests & batching
 */
export const setRequestBatching: (requestBatching: boolean) => Layer<never> = (
 requestBatching: boolean
) =>
 scopedDiscard(
 fiberRuntime.fiberRefLocallyScoped(core.currentRequestBatching, requestBatching)
 )

/**
 * @since 2.0.0
 * @category requests & batching
 */
export const setRequestCaching: (requestCaching: boolean) => Layer<never> = (
 requestCaching: boolean
) =>
 scopedDiscard(
 fiberRuntime.fiberRefLocallyScoped(query.currentCacheEnabled, requestCaching)
 )

/**
 * @since 2.0.0
 * @category requests & batching
 */
export const setRequestCache: {
 /**
 * @since 2.0.0
 * @category requests & batching
 */
 <E, R>(cache: Effect.Effect<Request.Cache, E, R>): Layer<never, E, Exclude<R, Scope.Scope>>
 /**
 * @since 2.0.0
 * @category requests & batching
 */
 (cache: Request.Cache): Layer<never>
} = (<E, R>(cache: Request.Cache | Effect.Effect<Request.Cache, E, R>) =>
 scopedDiscard(
 core.isEffect(cache) ?
 core.flatMap(cache, (x) => fiberRuntime.fiberRefLocallyScoped(query.currentCache as any, x)) :
 fiberRuntime.fiberRefLocallyScoped(query.currentCache as any, cache)
 )) as any

/**
 * @since 2.0.0
 * @category scheduler
 */
export const setScheduler: (scheduler: Scheduler.Scheduler) => Layer<never> = (
 scheduler: Scheduler.Scheduler
): Layer<never> =>
 scopedDiscard(
 fiberRuntime.fiberRefLocallyScoped(Scheduler.currentScheduler, scheduler)
 )

/**
 * Create and add a span to the current span stack.
 *
 * The span is ended when the Layer is released.
 *
 * @since 2.0.0
 * @category tracing
 */
export const span: (
 name: string,
 options?: Tracer.SpanOptions & {
 readonly onEnd?:
 | ((span: Tracer.Span, exit: Exit.Exit<unknown, unknown>) => Effect.Effect<void>)
 | undefined
 }
) => Layer<Tracer.ParentSpan> = circularLayer.span

/**
 * Create a Layer that sets the current Tracer
 *
 * @since 2.0.0
 * @category tracing
 */
export const setTracer: (tracer: Tracer.Tracer) => Layer<never> = circularLayer.setTracer

/**
 * @since 2.0.0
 * @category tracing
 */
export const setTracerEnabled: (enabled: boolean) => Layer<never> = (enabled: boolean) =>
 scopedDiscard(
 fiberRuntime.fiberRefLocallyScoped(core.currentTracerEnabled, enabled)
 )

/**
 * @since 2.0.0
 * @category tracing
 */
export const setTracerTiming: (enabled: boolean) => Layer<never> = (enabled: boolean) =>
 scopedDiscard(
 fiberRuntime.fiberRefLocallyScoped(core.currentTracerTimingEnabled, enabled)
 )

/**
 * @since 2.0.0
 * @category logging
 */
export const setUnhandledErrorLogLevel: (level: Option.Option<LogLevel>) => Layer<never> = (
 level: Option.Option<LogLevel>
): Layer<never> =>
 scopedDiscard(
 fiberRuntime.fiberRefLocallyScoped(core.currentUnhandledErrorLogLevel, level)
 )

/**
 * @since 3.17.0
 * @category logging
 */
export const setVersionMismatchErrorLogLevel: (level: Option.Option<LogLevel>) => Layer<never> = (
 level: Option.Option<LogLevel>
): Layer<never> =>
 scopedDiscard(
 fiberRuntime.fiberRefLocallyScoped(core.currentVersionMismatchErrorLogLevel, level)
 )

/**
 * @since 2.0.0
 * @category tracing
 */
export const withSpan: {
 /**
 * @since 2.0.0
 * @category tracing
 */
 (
 name: string,
 options?: Tracer.SpanOptions & {
 readonly onEnd?:
 | ((span: Tracer.Span, exit: Exit.Exit<unknown, unknown>) => Effect.Effect<void>)
 | undefined
 }
 ): <A, E, R>(self: Layer<A, E, R>) => Layer<A, E, Exclude<R, Tracer.ParentSpan>>
 /**
 * @since 2.0.0
 * @category tracing
 */
 <A, E, R>(
 self: Layer<A, E, R>,
 name: string,
 options?: Tracer.SpanOptions & {
 readonly onEnd?:
 | ((span: Tracer.Span, exit: Exit.Exit<unknown, unknown>) => Effect.Effect<void>)
 | undefined
 }
 ): Layer<A, E, Exclude<R, Tracer.ParentSpan>>
} = internal.withSpan

/**
 * @since 2.0.0
 * @category tracing
 */
export const withParentSpan: {
 /**
 * @since 2.0.0
 * @category tracing
 */
 (span: Tracer.AnySpan): <A, E, R>(self: Layer<A, E, R>) => Layer<A, E, Exclude<R, Tracer.ParentSpan>>
 /**
 * @since 2.0.0
 * @category tracing
 */
 <A, E, R>(self: Layer<A, E, R>, span: Tracer.AnySpan): Layer<A, E, Exclude<R, Tracer.ParentSpan>>
} = internal.withParentSpan

// -----------------------------------------------------------------------------
// memo map
// -----------------------------------------------------------------------------

/**
 * Constructs a `MemoMap` that can be used to build additional layers.
 *
 * @since 2.0.0
 * @category memo map
 */
export const makeMemoMap: Effect.Effect<MemoMap> = internal.makeMemoMap

/**
 * Builds a layer into an `Effect` value, using the specified `MemoMap` to memoize
 * the layer construction.
 *
 * @since 2.0.0
 * @category memo map
 */
export const buildWithMemoMap: {
 /**
 * Builds a layer into an `Effect` value, using the specified `MemoMap` to memoize
 * the layer construction.
 *
 * @since 2.0.0
 * @category memo map
 */
 (memoMap: MemoMap, scope: Scope.Scope): <RIn, E, ROut>(self: Layer<ROut, E, RIn>) => Effect.Effect<Context.Context<ROut>, E, RIn>
 /**
 * Builds a layer into an `Effect` value, using the specified `MemoMap` to memoize
 * the layer construction.
 *
 * @since 2.0.0
 * @category memo map
 */
 <RIn, E, ROut>(self: Layer<ROut, E, RIn>, memoMap: MemoMap, scope: Scope.Scope): Effect.Effect<Context.Context<ROut>, E, RIn>
} = internal.buildWithMemoMap

/**
 * Updates a service in the context with a new implementation.
 *
 * **Details**
 *
 * This function modifies the existing implementation of a service in the
 * context. It retrieves the current service, applies the provided
 * transformation function `f`, and replaces the old service with the
 * transformed one.
 *
 * **When to Use**
 *
 * This is useful for adapting or extending a service's behavior during the
 * creation of a layer.
 *
 * @since 3.13.0
 * @category utils
 */
export const updateService = dual<
 /**
 * Updates a service in the context with a new implementation.
 *
 * **Details**
 *
 * This function modifies the existing implementation of a service in the
 * context. It retrieves the current service, applies the provided
 * transformation function `f`, and replaces the old service with the
 * transformed one.
 *
 * **When to Use**
 *
 * This is useful for adapting or extending a service's behavior during the
 * creation of a layer.
 *
 * @since 3.13.0
 * @category utils
 */
 <I, A>(tag: Context.Tag<I, A>, f: (a: A) => A) => <A1, E1, R1>(layer: Layer<A1, E1, R1>) => Layer<A1, E1, I | R1>,
 /**
 * Updates a service in the context with a new implementation.
 *
 * **Details**
 *
 * This function modifies the existing implementation of a service in the
 * context. It retrieves the current service, applies the provided
 * transformation function `f`, and replaces the old service with the
 * transformed one.
 *
 * **When to Use**
 *
 * This is useful for adapting or extending a service's behavior during the
 * creation of a layer.
 *
 * @since 3.13.0
 * @category utils
 */
 <A1, E1, R1, I, A>(layer: Layer<A1, E1, R1>, tag: Context.Tag<I, A>, f: (a: A) => A) => Layer<A1, E1, I | R1>
>(3, (layer, tag, f) =>
 provide(
 layer,
 map(context(), (c) => Context.add(c, tag, f(Context.unsafeGet(c, tag))))
 ))

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