type-plus/cjs/function/extract_function.d.ts

Provides additional types for TypeScript.

import type { AnyFunction } from './any_function.js';
/**
 * Extract the function signature from a composite type T.
 *
 * It works with interact of functions, but not on function overloads and union.
 * @note does not work with function overloads.
 *
 * ```ts
 * import type { ExtractFunction } from 'type-plus'
 *
 * type R = ExtractFunction<{
 *   () => void
 *   a: 1
 * }> // () => void
 * ```
 */
export type ExtractFunction<T extends AnyFunction> = T extends AnyFunction<infer P, infer R> ? (...args: P) => R : never;
/**
 * Extract the function signature from a composite function.
 *
 * @note does not work with function overloads.
 */
export declare function extractFunction<T extends AnyFunction>(fn: T): ExtractFunction<T>;
//# sourceMappingURL=extract_function.d.ts.map