option-t
Version:
A toolkit of Nullable/Option/Result type implementation in ECMAScript. Their APIs are inspired by Rust's `Option<T>` and `Result<T, E>`.
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TypeScript
import type { RecoveryFn } from '../../internal/function.js';
import { type Result } from '../../plain_result/core/result.js';
import { type Undefinable } from '../core/undefinable.js';
/**
* Transforms the `Undefinable<T>` into a `Result<T, E>` by mapping `T` to `Ok(T)`.
* If `input` is `undefined`, then returns `Err(E)` with the result of `recoverer()`
*/
export declare function okOrElseForUndefinable<T, E>(input: Undefinable<T>, recoverer: RecoveryFn<E>): Result<T, E>;