/// <reference path="_union.d.ts" />

declare namespace Tx {
	namespace Union {
		/**
		 * @from `@dulysse1/better-node`
		 * ### Get the last item of an union
		 * @example
		 * ```ts
		 * type T = Tx.Union.Last<"hello" | "world">;
		 * type T = "world";
		 * ```
		 * @param {any} U  The target union type
		 * @returns {any} The last union item or `never`
		 */
		type Last<U extends any> = _UnionLast<U>;
		/**
		 * @from `@dulysse1/better-node`
		 * ### Exclude an item of an union
		 * @example
		 * ```ts
		 * type T = Tx.Union.Exclude<"hello" | "world", "world">;
		 * type T = "hello";
		 * ```
		 * @param {any} U  The target union type
		 * @param {any} T The item to exclude
		 * @returns {any} The union without the excluded item
		 */
		type Exclude<U extends any, T extends any> = _UnionExclude<U, T>;
		/**
		 * @from `@dulysse1/better-node`
		 * ### Transform an union to an array
		 * @example
		 * ```ts
		 * type T = Tx.Union.ToArray<"hello" | "world">;
		 * type T = ["hello", "world"];
		 * ```
		 * @param {any} U  The target union type
		 * @returns {any[]} The union as array
		 */
		type ToArray<U extends any> = _UnionToArray<U>;
		/**
		 * @from `@dulysse1/better-node`
		 * ### get the length of the union
		 * @example
		 * ```ts
		 * type T = Tx.Union.Length<"hello" | "world">;
		 * type T = 2;
		 * ```
		 * @param {any} U  The target union type
		 * @returns {any[]} The length of the union
		 */
		type Length<U extends any> = _Satisfy<_UnionLength<U>, number>;
	}
}