option-t/esm/undefinable/and.d.ts

A toolkit of Nullable/Option/Result type implementation in ECMAScript. Their APIs are inspired by Rust's `Option<T>` and `Result<T, E>`.

import { type Undefinable } from './undefinable.js';
/**
 *  Return _b_ if _a_ is not `undefined`.
 *  Otherwise, return _a_.
 */
export declare function andForUndefinable<T, U>(a: Undefinable<T>, b: Undefinable<U>): Undefinable<U>;