import { type Result } from '../../plain_result/result.js';
import type { Option } from './option.js';
/**
 * Transforms the `Option<T>` into a `Result<T, E>`,
 * mapping `Some(v)` to `Ok(v)` and None to Err(err).
 *
 * Arguments passed to this are eagerly evaluated;
 * if you are passing the result of a function call, it is recommended to use okOrElse, which is lazily evaluated.
 */
export declare function okOrForPlainOption<T, E>(input: Option<T>, err: E): Result<T, E>;