<A>(update: (a: A) => Option.Option<A>): (
self: SubscriptionRef<A>
) => Effect.Effect<void>
<A>(
self: SubscriptionRef<A>,
update: (a: A) => Option.Option<A>
): Effect.Effect<void>Applies an update function to the current value. If it returns
Option.some, sets and publishes that value; if it returns Option.none,
leaves the reference unchanged and does not publish.
Example (Conditionally updating a value)
import { Effect, Option, SubscriptionRef } from "effect"
const program = Effect.gen(function*() {
const ref = yield* SubscriptionRef.make(10)
yield* SubscriptionRef.updateSome(
ref,
(n) => n > 5 ? Option.some(n * 2) : Option.none()
)
const value = yield* SubscriptionRef.get(ref)
console.log(value)
})updating
Source effect/SubscriptionRef.ts:85712 lines
export const const updateSome: {
<A>(update: (a: A) => Option.Option<A>): (
self: SubscriptionRef<A>
) => Effect.Effect<void>
<A>(
self: SubscriptionRef<A>,
update: (a: A) => Option.Option<A>
): Effect.Effect<void>
}
Applies an update function to the current value. If it returns
Option.some, sets and publishes that value; if it returns Option.none,
leaves the reference unchanged and does not publish.
Example (Conditionally updating a value)
import { Effect, Option, SubscriptionRef } from "effect"
const program = Effect.gen(function*() {
const ref = yield* SubscriptionRef.make(10)
yield* SubscriptionRef.updateSome(
ref,
(n) => n > 5 ? Option.some(n * 2) : Option.none()
)
const value = yield* SubscriptionRef.get(ref)
console.log(value)
})
updateSome: {
<function (type parameter) A in <A>(update: (a: A) => Option.Option<A>): (self: SubscriptionRef<A>) => Effect.Effect<void>A>(update: (a: A) => Option.Option<A>update: (a: Aa: function (type parameter) A in <A>(update: (a: A) => Option.Option<A>): (self: SubscriptionRef<A>) => Effect.Effect<void>A) => import OptionOption.type Option.Option = /*unresolved*/ anyOption<function (type parameter) A in <A>(update: (a: A) => Option.Option<A>): (self: SubscriptionRef<A>) => Effect.Effect<void>A>): (self: SubscriptionRef<A>(parameter) self: {
value: A;
semaphore: Semaphore.Semaphore;
pubsub: PubSub.PubSub<A>;
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; <…;
}
interface SubscriptionRef<in out A>A mutable reference whose updates are serialized and published to
subscribers.
When to use
Use to observe the current value and subsequent updates as a
stream.
The SubscriptionRef namespace containing type definitions associated with
subscription references.
SubscriptionRef<function (type parameter) A in <A>(update: (a: A) => Option.Option<A>): (self: SubscriptionRef<A>) => Effect.Effect<void>A>) => import EffectEffect.type Effect.Effect = /*unresolved*/ anyEffect<void>
<function (type parameter) A in <A>(self: SubscriptionRef<A>, update: (a: A) => Option.Option<A>): Effect.Effect<void>A>(self: SubscriptionRef<A>(parameter) self: {
value: A;
semaphore: Semaphore.Semaphore;
pubsub: PubSub.PubSub<A>;
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; <…;
}
interface SubscriptionRef<in out A>A mutable reference whose updates are serialized and published to
subscribers.
When to use
Use to observe the current value and subsequent updates as a
stream.
The SubscriptionRef namespace containing type definitions associated with
subscription references.
SubscriptionRef<function (type parameter) A in <A>(self: SubscriptionRef<A>, update: (a: A) => Option.Option<A>): Effect.Effect<void>A>, update: (a: A) => Option.Option<A>update: (a: Aa: function (type parameter) A in <A>(self: SubscriptionRef<A>, update: (a: A) => Option.Option<A>): Effect.Effect<void>A) => import OptionOption.type Option.Option = /*unresolved*/ anyOption<function (type parameter) A in <A>(self: SubscriptionRef<A>, update: (a: A) => Option.Option<A>): Effect.Effect<void>A>): import EffectEffect.type Effect.Effect = /*unresolved*/ anyEffect<void>
} = import dualdual(2, <function (type parameter) A in <A>(self: SubscriptionRef<A>, update: (a: A) => Option.Option<A>): anyA>(
self: SubscriptionRef<A>(parameter) self: {
value: A;
semaphore: Semaphore.Semaphore;
pubsub: PubSub.PubSub<A>;
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; <…;
}
interface SubscriptionRef<in out A>A mutable reference whose updates are serialized and published to
subscribers.
When to use
Use to observe the current value and subsequent updates as a
stream.
The SubscriptionRef namespace containing type definitions associated with
subscription references.
SubscriptionRef<function (type parameter) A in <A>(self: SubscriptionRef<A>, update: (a: A) => Option.Option<A>): anyA>,
update: (a: A) => Option.Option<A>update: (a: Aa: function (type parameter) A in <A>(self: SubscriptionRef<A>, update: (a: A) => Option.Option<A>): anyA) => import OptionOption.type Option.Option = /*unresolved*/ anyOption<function (type parameter) A in <A>(self: SubscriptionRef<A>, update: (a: A) => Option.Option<A>): anyA>
) =>
self: SubscriptionRef<A>(parameter) self: {
value: A;
semaphore: Semaphore.Semaphore;
pubsub: PubSub.PubSub<A>;
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; <…;
}
SubscriptionRef<in out A>.semaphore: Semaphore.Semaphore(property) SubscriptionRef<in out A>.semaphore: {
resize: (this: Semaphore, permits: number) => Effect.Effect<void>;
withPermits: (this: Semaphore, permits: number) => <A, E, R>(self: Effect.Effect<A, E, R>) => Effect.Effect<A, E, R>;
withPermit: <A, E, R>(self: Effect.Effect<A, E, R>) => Effect.Effect<A, E, R>;
withPermitsIfAvailable: (this: Semaphore, permits: number) => <A, E, R>(self: Effect.Effect<A, E, R>) => Effect.Effect<Option.Option<A>, E, R>;
take: (this: Semaphore, permits: number) => Effect.Effect<number>;
release: (this: Semaphore, permits: number) => Effect.Effect<number>;
releaseAll: Effect.Effect<number>;
}
import EffectEffect.sync(() => {
const const option: Option.Option<A>option = update: (a: A) => Option.Option<A>update(self: SubscriptionRef<A>(parameter) self: {
value: A;
semaphore: Semaphore.Semaphore;
pubsub: PubSub.PubSub<A>;
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; <…;
}
SubscriptionRef<A>.value: Avalue)
if (import OptionOption.isNone(const option: Option.Option<A>option)) return
const setUnsafe: <A>(
self: SubscriptionRef<A>,
value: A
) => void
self: SubscriptionRef<A>(parameter) self: {
value: A;
semaphore: Semaphore.Semaphore;
pubsub: PubSub.PubSub<A>;
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; <…;
}
const option: Option.Some<A>const option: {
_tag: "Some";
_op: "Some";
value: A;
valueOrUndefined: A;
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; <…;
toString: () => string;
toJSON: () => unknown;
}