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function / @typed/fx/RefSubject

increment

Increments a numeric RefSubject by 1.

Package version
2.0.0-beta.13
Category
State updates
Since
1.0.0

Import

import { increment } from "@typed/fx/RefSubject";

Signatures

export declare function increment<E, R>(ref: RefSubject<number, E, R>): Effect.Effect<number, E, R>;

Why

Increments a numeric RefSubject by 1. The transition is serialized at the RefSubject rather than coordinated by callers or UI components.

Ownership and lifetime

Running increment performs one serialized subject transition and resolves with its committed value. It acquires no resource; failures and services remain those of the source ref.

Examples

import { Effect } from "effect"
import * as RefSubject from "@typed/fx/RefSubject"

const program = Effect.gen(function* () {
  const count = yield* RefSubject.make(0)

  yield* RefSubject.increment(count)
  const value = yield* count
  console.log(value) // 1

  yield* RefSubject.increment(count)
  const newValue = yield* count
  console.log(newValue) // 2
})

Other public imports

These import paths expose the same declaration. Each page retains its own public name and signature.

Source