import {Iteration} from './Iteration'
import {Format} from './Format'

/** Get the position of **`I`** (**string**)
 * @param I to query
 * @returns **`string`**
 * @example
 * ```ts
 * import {I} from 'ts-toolbelt'
 *
 * type i = I.IterationOf<'20'>
 *
 * type test0 = I.Key<i>         // '20'
 * type test1 = I.Key<I.Next<i>> // '21'
 * ```
 */
export type Key<I extends Iteration> =
    Format<I, 's'>