Follow one execution
Local values are suppressed while its lifetime and failures remain observable.
mergeRightTick 0. Local: local-1.
Read this diagram
Follow each lane from left to right. Events stacked vertically share a tick; the green cursor marks the current time across every lane.
- A value
The text inside the pill is the emitted value. - Work starts
The raised chevron starts an inner run (^in the source). - The run returns
The vertical bar ends this lane’s run. - A cause is delivered
The exclamation mark belongs to this lane. - Work is interrupted
The cross marks cancellation of this run. - Current time
The line and diamond move together across all lanes. - Happening now
A highlighted event is at the current tick. - Still ahead
Muted, dashed values have not happened yet. - Time continues
The lane’s arrow is not a return marker. An empty stretch can be quiet work that is still running.
Illustrated ticks start at 0. At 1×, one illustrated tick takes one second; captions specify real durations when timing matters. A cause or interruption belongs to its lane, and other work may continue. Scroll horizontally to inspect the rest of a long timeline.
The consumer owns both concurrent runs and normal completion waits for both. Interruption cancels both. A Cause is delivered to the Sink without inherently canceling the sibling; left successes remain suppressed even while their failures are observable.
Import
import { mergeRight } from "@typed/fx/Fx";Signatures
export declare const mergeRight: {
<A2, E2, R2>(that: Fx<A2, E2, R2>): <A, E, R>(self: Fx<A, E, R>) => Fx<A2, E | E2, R | R2>;
<A, E, R, A2, E2, R2>(self: Fx<A, E, R>, that: Fx<A2, E2, R2>): Fx<A2, E | E2, R | R2>;
};Why
mergeRight observes the left producer’s completion and failure while exposing only right
values. Each right value is emitted once with no deterministic ordering against hidden left work.
Ownership and lifetime
The consumer owns both concurrent runs and normal completion waits for both. Interruption cancels both. A Cause is delivered to the Sink without inherently canceling the sibling; left successes remain suppressed even while their failures are observable.
Examples
import { Effect, Ref } from "effect"
import { Fx, Sink } from "@typed/fx"
const program = Effect.gen(function* () {
const values = yield* Ref.make<Array<string>>([])
yield* Fx.mergeRight(Fx.fail("hidden side failed"), Fx.succeed("visible")).run(
Sink.make(() => Effect.void, (value) => Ref.update(values, (xs) => [...xs, value]))
)
return yield* Ref.get(values) // ["visible"]
})Other public imports
These import paths expose the same declaration. Each page retains its own public name and signature.