effect-io-ai

Package: effect
Module: Option

Option.makeCombinerFailFast

Creates a Combiner for Option<A> with fail-fast semantics: returns None if either operand is None.

When to use

Use when you need an Option combiner that returns None unless both operands are Some.

Details

• None + anything → None
• anything + None → None
• Some(a) + Some(b) → Some(combine(a, b))

Example (Fail-fast combining)

import { Number, Option } from "effect"

const combiner = Option.makeCombinerFailFast(Number.ReducerSum)
console.log(combiner.combine(Option.some(1), Option.some(2)))
// Output: { _id: 'Option', _tag: 'Some', value: 3 }

console.log(combiner.combine(Option.some(1), Option.none()))
// Output: { _id: 'Option', _tag: 'None' }

See

• makeReducerFailFast to get a full Reducer

Signature

declare const makeCombinerFailFast: <A>(combiner: Combiner.Combiner<A>) => Combiner.Combiner<Option<A>>

Source

Since v4.0.0