<
Self,
F extends QueueItemFields = QueueItemFields,
R = never,
RR = never,
Success extends Schema.Top = Schema.Void,
Error extends Schema.Top = Schema.Never
>(
tag: QueueTagFor<Self, F, Success, Error>,
config: QueueVerbConfig<F, QueueErrorValueOf<Error>, R, RR, Success>
): Layer.Layer<Self | Local<Self> | Store.Storage, never, R | RR>Local queue layer — soft-defaults Store.Storage (R fulfilled). Override with
QueueHyperlink.layer(…).pipe(Layer.provideMerge(AppStore.layer…)).
export const const layer: <
Self,
F extends QueueItemFields = QueueItemFields,
R = never,
RR = never,
Success extends Schema.Top = Schema.Void,
Error extends Schema.Top = Schema.Never
>(
tag: QueueTagFor<Self, F, Success, Error>,
config: QueueVerbConfig<
F,
QueueErrorValueOf<Error>,
R,
RR,
Success
>
) => Layer.Layer<
Self | Local<Self> | Store.Storage,
never,
R | RR
>
Local queue layer — soft-defaults
Store.Storage
(R fulfilled). Override with
QueueHyperlink.layer(…).pipe(Layer.provideMerge(AppStore.layer…)).
layer = <
function (type parameter) Self in <Self, F extends QueueItemFields = QueueItemFields, R = never, RR = never, Success extends Schema.Top = Schema.Void, Error extends Schema.Top = Schema.Never>(tag: QueueTagFor<Self, F, Success, Error>, config: QueueVerbConfig<F, QueueErrorValueOf<Error>, R, RR, Success>): Layer.Layer<Self | Local<Self> | Store.Storage, never, R | RR>Self,
function (type parameter) F in <Self, F extends QueueItemFields = QueueItemFields, R = never, RR = never, Success extends Schema.Top = Schema.Void, Error extends Schema.Top = Schema.Never>(tag: QueueTagFor<Self, F, Success, Error>, config: QueueVerbConfig<F, QueueErrorValueOf<Error>, R, RR, Success>): Layer.Layer<Self | Local<Self> | Store.Storage, never, R | RR>F extends type QueueItemFields = {
[x: string]: Schema.Codec<
unknown,
unknown,
never,
never
>
}
The item-schema constraint shared by
layer
/
serve
/
serveRemote
.
QueueItemFields = type QueueItemFields = {
[x: string]: Schema.Codec<
unknown,
unknown,
never,
never
>
}
The item-schema constraint shared by
layer
/
serve
/
serveRemote
.
QueueItemFields,
function (type parameter) R in <Self, F extends QueueItemFields = QueueItemFields, R = never, RR = never, Success extends Schema.Top = Schema.Void, Error extends Schema.Top = Schema.Never>(tag: QueueTagFor<Self, F, Success, Error>, config: QueueVerbConfig<F, QueueErrorValueOf<Error>, R, RR, Success>): Layer.Layer<Self | Local<Self> | Store.Storage, never, R | RR>R = never,
function (type parameter) RR in <Self, F extends QueueItemFields = QueueItemFields, R = never, RR = never, Success extends Schema.Top = Schema.Void, Error extends Schema.Top = Schema.Never>(tag: QueueTagFor<Self, F, Success, Error>, config: QueueVerbConfig<F, QueueErrorValueOf<Error>, R, RR, Success>): Layer.Layer<Self | Local<Self> | Store.Storage, never, R | RR>RR = never,
function (type parameter) Success in <Self, F extends QueueItemFields = QueueItemFields, R = never, RR = never, Success extends Schema.Top = Schema.Void, Error extends Schema.Top = Schema.Never>(tag: QueueTagFor<Self, F, Success, Error>, config: QueueVerbConfig<F, QueueErrorValueOf<Error>, R, RR, Success>): Layer.Layer<Self | Local<Self> | Store.Storage, never, R | RR>Success extends import SchemaSchema.Top = typeof import SchemaSchema.const Void: Schema.Voidconst Void: {
Rebuild: Rebuild;
Iso: Iso;
ast: Ast;
Type: T;
Encoded: E;
DecodingServices: RD;
EncodingServices: RE;
annotate: (annotations: Schema.Annotations.Bottom<void, readonly []>) => Schema.Void;
annotateKey: (annotations: Schema.Annotations.Key<void>) => Schema.Void;
check: (checks_0: Check<void>, ...checks: Array<Check<void>>) => Schema.Void;
rebuild: (ast: Void) => Schema.Void;
make: (input: void, options?: Schema.MakeOptions) => void;
makeOption: (input: void, options?: Schema.MakeOptions) => Option.Option<void>;
makeEffect: (input: void, options?: Schema.MakeOptions) => Effect.Effect<void, Schema.SchemaError, never>;
pipe: { <A>(this: A): A; <A, B = never>(this: A, ab: (_: A) => B): B; <A, B = never, C = never>(this: A, ab: (_: A) => B, bc: (_: B) => C): C; <A, B = never, C = never, D = never>(this: A, ab: (_: A) => B, bc: (_: B) => C, cd: (_: C) => D): D; <…;
}
Type-level representation of
Void
.
Schema for a TypeScript void return value.
When to use
Use when you need to model the return value of a function, RPC, or endpoint
whose result is intentionally ignored.
Details
Runtime parsing accepts any present value and discards it, producing
undefined. The public decoded and encoded TypeScript representation remains
void, so typed construction, decoding, and encoding APIs are still modeled
as void.
Void,
function (type parameter) Error in <Self, F extends QueueItemFields = QueueItemFields, R = never, RR = never, Success extends Schema.Top = Schema.Void, Error extends Schema.Top = Schema.Never>(tag: QueueTagFor<Self, F, Success, Error>, config: QueueVerbConfig<F, QueueErrorValueOf<Error>, R, RR, Success>): Layer.Layer<Self | Local<Self> | Store.Storage, never, R | RR>Error extends import SchemaSchema.Top = typeof import SchemaSchema.const Never: Schema.Neverconst Never: {
Rebuild: Rebuild;
Iso: Iso;
ast: Ast;
Type: T;
Encoded: E;
DecodingServices: RD;
EncodingServices: RE;
annotate: (annotations: Schema.Annotations.Bottom<never, readonly []>) => Schema.Never;
annotateKey: (annotations: Schema.Annotations.Key<never>) => Schema.Never;
check: (checks_0: Check<never>, ...checks: Array<Check<never>>) => Schema.Never;
rebuild: (ast: Never) => Schema.Never;
make: (input: never, options?: Schema.MakeOptions) => never;
makeOption: (input: never, options?: Schema.MakeOptions) => Option.Option<never>;
makeEffect: (input: never, options?: Schema.MakeOptions) => Effect.Effect<never, Schema.SchemaError, never>;
pipe: { <A>(this: A): A; <A, B = never>(this: A, ab: (_: A) => B): B; <A, B = never, C = never>(this: A, ab: (_: A) => B, bc: (_: B) => C): C; <A, B = never, C = never, D = never>(this: A, ab: (_: A) => B, bc: (_: B) => C, cd: (_: C) => D): D; <…;
}
Type-level representation of
Never
.
Schema for the never type. Always fails validation — no value satisfies it.
Never,
>(
tag: anytag: type QueueTagFor<
Self,
F extends QueueItemFields,
Success extends Schema.Top,
Error extends Schema.Top
> = any
The tag: param shape shared by every queue verb (
buildQueueImpl
/
layer
/
serve
/
serveRemote
/
configure
): the instance's
HyperlinkTag
over
the threaded
QueueInstanceSpec
<F, Success, Error> (so events carries the real
Cause<Error> / Completed.success, matching
materializeQueueTag
), plus the
worker-success/error carriers. Both are needed: the spec sits at HyperlinkTag's invariant
Shape position (unreliable for inference), so the covariant carriers give the verbs a stable
surface to infer Success/Error from the passed tag.
QueueTagFor<function (type parameter) Self in <Self, F extends QueueItemFields = QueueItemFields, R = never, RR = never, Success extends Schema.Top = Schema.Void, Error extends Schema.Top = Schema.Never>(tag: QueueTagFor<Self, F, Success, Error>, config: QueueVerbConfig<F, QueueErrorValueOf<Error>, R, RR, Success>): Layer.Layer<Self | Local<Self> | Store.Storage, never, R | RR>Self, function (type parameter) F in <Self, F extends QueueItemFields = QueueItemFields, R = never, RR = never, Success extends Schema.Top = Schema.Void, Error extends Schema.Top = Schema.Never>(tag: QueueTagFor<Self, F, Success, Error>, config: QueueVerbConfig<F, QueueErrorValueOf<Error>, R, RR, Success>): Layer.Layer<Self | Local<Self> | Store.Storage, never, R | RR>F, function (type parameter) Success in <Self, F extends QueueItemFields = QueueItemFields, R = never, RR = never, Success extends Schema.Top = Schema.Void, Error extends Schema.Top = Schema.Never>(tag: QueueTagFor<Self, F, Success, Error>, config: QueueVerbConfig<F, QueueErrorValueOf<Error>, R, RR, Success>): Layer.Layer<Self | Local<Self> | Store.Storage, never, R | RR>Success, function (type parameter) Error in <Self, F extends QueueItemFields = QueueItemFields, R = never, RR = never, Success extends Schema.Top = Schema.Void, Error extends Schema.Top = Schema.Never>(tag: QueueTagFor<Self, F, Success, Error>, config: QueueVerbConfig<F, QueueErrorValueOf<Error>, R, RR, Success>): Layer.Layer<Self | Local<Self> | Store.Storage, never, R | RR>Error>,
config: QueueVerbConfig<
F,
QueueErrorValueOf<Error>,
R,
RR,
Success
>
type QueueVerbConfig<
F extends QueueItemFields,
E,
R,
RR,
Success extends Schema.Top
> = Omit<
QueueHyperlinkConfigWithItemSchema<
Item,
E,
R,
A
>,
"itemSchema" | "refill"
> & {
readonly refill?:
| {
readonly onStart?: boolean
readonly onDrained?: boolean
readonly load: (
queue: QueueHandle<
Schema.Struct.View<
F,
"Type",
Schema.Struct.TypeOptionalKeys<F>,
Schema.Struct.TypeMutableKeys<F>
>,
E,
QueueEnqueueErrors,
never,
QueueSuccessValueOf<Success>
>
) => Effect.Effect<void, never, RR>
}
| undefined
}
The worker-config: param shape shared by every queue verb —
QueueLayerConfig
with the
instance item type + worker-success value recovered from F / Success.
QueueVerbConfig<function (type parameter) F in <Self, F extends QueueItemFields = QueueItemFields, R = never, RR = never, Success extends Schema.Top = Schema.Void, Error extends Schema.Top = Schema.Never>(tag: QueueTagFor<Self, F, Success, Error>, config: QueueVerbConfig<F, QueueErrorValueOf<Error>, R, RR, Success>): Layer.Layer<Self | Local<Self> | Store.Storage, never, R | RR>F, type QueueErrorValueOf<
Error extends Schema.Top
> = Error["Type"]
The worker error value type (E) carried on a queue instance spec's Error wire schema — the
decoded type of the tag's error slot (default never). The layer/serve config's worker failure
channel is constrained to this.
QueueErrorValueOf<function (type parameter) Error in <Self, F extends QueueItemFields = QueueItemFields, R = never, RR = never, Success extends Schema.Top = Schema.Void, Error extends Schema.Top = Schema.Never>(tag: QueueTagFor<Self, F, Success, Error>, config: QueueVerbConfig<F, QueueErrorValueOf<Error>, R, RR, Success>): Layer.Layer<Self | Local<Self> | Store.Storage, never, R | RR>Error>, function (type parameter) R in <Self, F extends QueueItemFields = QueueItemFields, R = never, RR = never, Success extends Schema.Top = Schema.Void, Error extends Schema.Top = Schema.Never>(tag: QueueTagFor<Self, F, Success, Error>, config: QueueVerbConfig<F, QueueErrorValueOf<Error>, R, RR, Success>): Layer.Layer<Self | Local<Self> | Store.Storage, never, R | RR>R, function (type parameter) RR in <Self, F extends QueueItemFields = QueueItemFields, R = never, RR = never, Success extends Schema.Top = Schema.Void, Error extends Schema.Top = Schema.Never>(tag: QueueTagFor<Self, F, Success, Error>, config: QueueVerbConfig<F, QueueErrorValueOf<Error>, R, RR, Success>): Layer.Layer<Self | Local<Self> | Store.Storage, never, R | RR>RR, function (type parameter) Success in <Self, F extends QueueItemFields = QueueItemFields, R = never, RR = never, Success extends Schema.Top = Schema.Void, Error extends Schema.Top = Schema.Never>(tag: QueueTagFor<Self, F, Success, Error>, config: QueueVerbConfig<F, QueueErrorValueOf<Error>, R, RR, Success>): Layer.Layer<Self | Local<Self> | Store.Storage, never, R | RR>Success>,
): import LayerLayer.interface Layer<in ROut, out E = never, out RIn = never>A Layer describes how to build one or more services for dependency injection.
When to use
Use to model construction of application services for dependency injection,
especially when services have dependencies, can fail during construction, or
need scoped setup and release.
Details
A Layer<ROut, E, RIn> represents ROut as the services this layer
provides, E as the possible errors during layer construction, and RIn as
the services this layer requires as dependencies.
Layer<function (type parameter) Self in <Self, F extends QueueItemFields = QueueItemFields, R = never, RR = never, Success extends Schema.Top = Schema.Void, Error extends Schema.Top = Schema.Never>(tag: QueueTagFor<Self, F, Success, Error>, config: QueueVerbConfig<F, QueueErrorValueOf<Error>, R, RR, Success>): Layer.Layer<Self | Local<Self> | Store.Storage, never, R | RR>Self | import LocalLocal<function (type parameter) Self in <Self, F extends QueueItemFields = QueueItemFields, R = never, RR = never, Success extends Schema.Top = Schema.Void, Error extends Schema.Top = Schema.Never>(tag: QueueTagFor<Self, F, Success, Error>, config: QueueVerbConfig<F, QueueErrorValueOf<Error>, R, RR, Success>): Layer.Layer<Self | Local<Self> | Store.Storage, never, R | RR>Self> | import StoreStore.type Store.Storage = /*unresolved*/ anyStorage, never, function (type parameter) R in <Self, F extends QueueItemFields = QueueItemFields, R = never, RR = never, Success extends Schema.Top = Schema.Void, Error extends Schema.Top = Schema.Never>(tag: QueueTagFor<Self, F, Success, Error>, config: QueueVerbConfig<F, QueueErrorValueOf<Error>, R, RR, Success>): Layer.Layer<Self | Local<Self> | Store.Storage, never, R | RR>R | function (type parameter) RR in <Self, F extends QueueItemFields = QueueItemFields, R = never, RR = never, Success extends Schema.Top = Schema.Void, Error extends Schema.Top = Schema.Never>(tag: QueueTagFor<Self, F, Success, Error>, config: QueueVerbConfig<F, QueueErrorValueOf<Error>, R, RR, Success>): Layer.Layer<Self | Local<Self> | Store.Storage, never, R | RR>RR> =>
const withDefaultMemory: <unknown, unknown, R | RR>(layer: Layer.Layer<unknown, unknown, any>) => Layer.Layer<any, unknown, R | RR>Satisfy
Store.Storage
with the ephemeral default and export it for readback.
Prefer
layer
Layer.provide(AppStore.layer…).
withDefaultMemory(
import LayerLayer.const unwrap: <
unknown,
never,
any,
unknown,
unknown
>(
self: Effect.Effect<
Layer.Layer<unknown, never, any>,
unknown,
unknown
>
) => Layer.Layer<unknown, unknown, any>
Unwraps a Layer from an Effect, flattening the nested structure.
When to use
Use when you have an Effect that produces a Layer and you want to
use that layer directly.
Details
The resulting Layer will have the combined error and dependency types from
both the outer Effect and the inner Layer.
Example (Unwrapping an effectful layer)
import { Context, Effect, Layer } from "effect"
class Database extends Context.Service<Database, {
readonly query: (sql: string) => Effect.Effect<string>
}>()("Database") {}
const layerEffect = Effect.succeed(
Layer.succeed(Database, { query: Effect.fn("Database.query")((sql: string) => Effect.succeed("result")) })
)
const unwrappedLayer = Layer.unwrap(layerEffect)
unwrap(
import EffectEffect.const map: <any, unknown, unknown, any>(self: Effect.Effect<any, unknown, unknown>, f: (a: any) => any) => Effect.Effect<any, unknown, unknown> (+1 overload)Transforms the value inside an effect by applying a function to it.
When to use
Use to transform an effect's success value with a function that returns a
plain value, producing a new effect without changing the original effect's
typed error or context requirements.
Details
map takes a function and applies it to the value contained within an
effect, creating a new effect with the transformed value.
It's important to note that effects are immutable, meaning that the original
effect is not modified. Instead, a new effect is returned with the updated
value.
Example (Choosing map syntax variants)
import { Effect, pipe } from "effect"
const myEffect = Effect.succeed(1)
const transformation = (n: number) => n + 1
const mappedWithPipe = pipe(myEffect, Effect.map(transformation))
const mappedWithDataFirst = Effect.map(myEffect, transformation)
const mappedWithMethod = myEffect.pipe(Effect.map(transformation))
Example (Adding a service charge)
import { Effect, pipe } from "effect"
const addServiceCharge = (amount: number) => amount + 1
const fetchTransactionAmount = Effect.promise(() => Promise.resolve(100))
const finalAmount = pipe(
fetchTransactionAmount,
Effect.map(addServiceCharge)
)
Effect.runPromise(finalAmount).then(console.log)
// Output: 101
map(const buildQueueImpl: <
unknown,
F,
R,
RR,
Success,
Error
>(
tag: QueueTagFor<unknown, F, Success, Error>,
config: QueueVerbConfig<
F,
QueueErrorValueOf<Error>,
R,
RR,
Success
>
) => Effect.Effect<any, unknown, unknown>
Build the live
QueueEngine
handle behind tag and map it onto the toolkit service
impl — the single adapter shared by the local layer (
layer
) and the served
forms (
serve
/
serveRemote
). The worker R is captured at build time and
provided to each method, so the impl requires nothing beyond the scope; the engine queue
name defaults to the tag id (telemetry attribution) unless config.name overrides.
The queue spec has no
Hyperlink.local
members, so the resulting impl satisfies both
ImplOf (for Hyperlink.layer / Hyperlink.serve) and ServeImplOf (for Hyperlink.serveRemote).
buildQueueImpl(tag: anytag, config: QueueVerbConfig<
F,
QueueErrorValueOf<Error>,
R,
RR,
Success
>
built: anybuilt) =>
import HyperlinkHyperlink.layer(tag: anytag, import HyperlinkHyperlink.grantLocal(tag: anytag, built: anybuilt)),
),
),
);