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>`.
10 lines (9 loc) • 498 B
TypeScript
import type { TransformFn } from '../../internal/function.js';
import { type Result } from '../core/result.js';
/**
* Maps a `Result<T, E>` to `Result<T, F>` by applying a _transformer_ function `mapFn<E, F>`
* to an contained `Err(E)` value, leaving an `Ok(T)` value untouched.
*
* This function can be used to pass through a successful result while handling an error.
*/
export declare function mapErrForResult<T, E, F>(input: Result<T, E>, transformer: TransformFn<E, F>): Result<T, F>;