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option-t

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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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import type { Nullable } from '../nullable/nullable.js'; import type { Result } from './result.js'; /** * Unwrap `T` if _input_ is `Ok(T)`. * Otherwise, return `null`. */ export declare function toNullableFromOk<T>(input: Result<T, unknown>): Nullable<T>; /** * Unwrap `E` if _input_ is `Err(E)`. * Otherwise, return `null`. */ export declare function toNullableFromErr<E>(input: Result<unknown, E>): Nullable<E>;