rambdax/_ts-toolbelt/src/Class/InstanceOf.ts

Extended version of Rambda - a lightweight, faster alternative to Ramda

import {Class} from './Class'

/**
 * Get the instance type of a `class` from a class object
 * @param C **typeof** class
 * @returns [[Object]]
 * @example
 * ```ts
 * import {C} from 'ts-toolbelt'
 *
 * /// `create` takes an instance constructor and creates an instance of it
 * declare function create<C extends (new (...args: any[]) => any)>(c: C): C.InstanceOf<C>
 *
 * class A {}
 * class B {}
 *
 * let a = create(A) // A
 * let b = create(B) // B
 * ```
 */
export type InstanceOf<C extends Class> =
    C extends Class<any[], infer R>
    ? R
    : any