Effect<number, never, never>Accesses the current fiber id executing the effect.
Example (Accessing the current fiber id)
import { Effect } from "effect"
const program = Effect.log("event").pipe(
// Read the current span with the fiber id for tagging.
Effect.andThen(Effect.all([Effect.currentSpan, Effect.fiberId])),
Effect.withSpan("A"),
Effect.map(([span, fiberId]) => ({
spanName: span.name,
fiberId
}))
)export const const fiberId: Effect<number>const fiberId: {
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;
}
Accesses the current fiber id executing the effect.
Example (Accessing the current fiber id)
import { Effect } from "effect"
const program = Effect.log("event").pipe(
// Read the current span with the fiber id for tagging.
Effect.andThen(Effect.all([Effect.currentSpan, Effect.fiberId])),
Effect.withSpan("A"),
Effect.map(([span, fiberId]) => ({
spanName: span.name,
fiberId
}))
)
fiberId: interface Effect<out A, out E = never, out R = never>The Effect interface defines a value that lazily describes a workflow or
job. The workflow requires some context R, and may fail with an error of
type E, or succeed with a value of type A.
When to use
Use when you need to represent a lazy, composable workflow that can require
services, fail with a typed error, or succeed with a typed value.
Details
Effect values model resourceful interaction with the outside world,
including synchronous, asynchronous, concurrent, and parallel interaction.
They use a fiber-based concurrency model, with built-in support for
scheduling, fine-grained interruption, structured concurrency, and high
scalability.
To run an Effect value, you need a Runtime, which is a type that is
capable of executing Effect values.
Effect<number> = import internalinternal.const fiberId: Effect<
number,
never,
never
>
const fiberId: {
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;
}