<A, E, R, L = never>(effect: Effect.Effect<End<A, L>, E, R>): Sink<
A,
unknown,
L,
E,
R
>Creates a sink that ignores upstream input and completes from an effect that
already returns an End.
When to use
Use when you need to create a sink from an effect that returns both the sink result value and optional leftovers.
export const const fromEffectEnd: <A, E, R, L = never>(
effect: Effect.Effect<End<A, L>, E, R>
) => Sink<A, unknown, L, E, R>
Creates a sink that ignores upstream input and completes from an effect that
already returns an End.
When to use
Use when you need to create a sink from an effect that returns both the sink
result value and optional leftovers.
fromEffectEnd = <function (type parameter) A in <A, E, R, L = never>(effect: Effect.Effect<End<A, L>, E, R>): Sink<A, unknown, L, E, R>A, function (type parameter) E in <A, E, R, L = never>(effect: Effect.Effect<End<A, L>, E, R>): Sink<A, unknown, L, E, R>E, function (type parameter) R in <A, E, R, L = never>(effect: Effect.Effect<End<A, L>, E, R>): Sink<A, unknown, L, E, R>R, function (type parameter) L in <A, E, R, L = never>(effect: Effect.Effect<End<A, L>, E, R>): Sink<A, unknown, L, E, R>L = never>(
effect: Effect.Effect<End<A, L>, E, R>(parameter) effect: {
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;
}
import EffectEffect.type Effect.Effect = /*unresolved*/ anyEffect<type End<A, L = never> = readonly [
value: A,
leftover?: any
]
Tuple returned when a Sink finishes.
Details
The first element is the sink result. The optional second element contains a
non-empty array of leftover input that was pulled but not consumed.
End<function (type parameter) A in <A, E, R, L = never>(effect: Effect.Effect<End<A, L>, E, R>): Sink<A, unknown, L, E, R>A, function (type parameter) L in <A, E, R, L = never>(effect: Effect.Effect<End<A, L>, E, R>): Sink<A, unknown, L, E, R>L>, function (type parameter) E in <A, E, R, L = never>(effect: Effect.Effect<End<A, L>, E, R>): Sink<A, unknown, L, E, R>E, function (type parameter) R in <A, E, R, L = never>(effect: Effect.Effect<End<A, L>, E, R>): Sink<A, unknown, L, E, R>R>
): interface Sink<out A, in In = unknown, out L = never, out E = never, out R = never>A Sink<A, In, L, E, R> is used to consume elements produced by a Stream.
You can think of a sink as a function that will consume a variable amount of
In elements (could be 0, 1, or many), might fail with an error of type E,
and will eventually yield a value of type A together with a remainder of
type L (i.e. any leftovers).
Example (Running a sink with a stream)
import { Effect, Sink, Stream } from "effect"
// Create a simple sink that always succeeds with a value
const sink: Sink.Sink<number> = Sink.succeed(42)
// Use the sink to consume a stream
const stream = Stream.make(1, 2, 3)
const program = Stream.run(stream, sink)
Effect.runPromise(program).then(console.log)
// Output: 42
Namespace containing types and interfaces for Sink variance and type relationships.
Sink<function (type parameter) A in <A, E, R, L = never>(effect: Effect.Effect<End<A, L>, E, R>): Sink<A, unknown, L, E, R>A, unknown, function (type parameter) L in <A, E, R, L = never>(effect: Effect.Effect<End<A, L>, E, R>): Sink<A, unknown, L, E, R>L, function (type parameter) E in <A, E, R, L = never>(effect: Effect.Effect<End<A, L>, E, R>): Sink<A, unknown, L, E, R>E, function (type parameter) R in <A, E, R, L = never>(effect: Effect.Effect<End<A, L>, E, R>): Sink<A, unknown, L, E, R>R> => const fromTransform: <
In,
A,
E,
R,
L = never
>(
transform: (
upstream: Pull.Pull<
NonEmptyReadonlyArray<In>,
never,
void
>,
scope: Scope.Scope
) => Effect.Effect<End<A, L>, E, R>
) => Sink<A, In, L, E, R>
Creates a Sink from a low-level transform function.
Details
The transform receives the upstream pull of non-empty input arrays and the
active scope, and returns an effect that completes with the sink's End
value.
fromTransform(() => effect: Effect.Effect<End<A, L>, E, R>(parameter) effect: {
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;
}