effect-io-ai

Package: effect
Module: UndefinedOr

UndefinedOr.makeReducerFailFast

Creates a Reducer for A | undefined by wrapping an existing reducer with fail-fast semantics.

When to use

Use to wrap an existing Reducer so any undefined value aborts the entire reduction result.

Details

• Initial value is the wrapped reducer’s initialValue
• Combining two defined values delegates to the wrapped reducer
• If the accumulator or next value is undefined, the reduction returns undefined

See

• makeCombinerFailFast if you only have a Combiner and want to lift it to UndefinedOr values.

Signature

declare const makeReducerFailFast: <A>(reducer: Reducer.Reducer<A>) => Reducer.Reducer<A | undefined>

Source

Since v4.0.0