From a9a4b4d84970df5d102b18ddf97ffd73a46a7040 Mon Sep 17 00:00:00 2001
From: Josh Rosenstein <32781407+JoshRosenstein@users.noreply.github.com>
Date: Sun, 14 Apr 2019 21:17:58 -0400
Subject: [PATCH] feat: add UnionToIntersection

---
 src/types/utils.ts | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/src/types/utils.ts b/src/types/utils.ts
index b4e9244..a7b6db6 100644
--- a/src/types/utils.ts
+++ b/src/types/utils.ts
@@ -34,3 +34,13 @@ export type Nominal<T, N extends string> = T & Tagged<N>;
  * @returns a the type union with a promise containing the given type
  */
 export type PromiseOr<T> = Promise<T> | T;
+
+
+/**
+ * Defines an intersection type of all union items.
+ * @param U Union of any types that will be intersected.
+ * @returns U items intersected
+ * @see https://stackoverflow.com/a/50375286/9259330
+ */
+export type UnionToIntersection<U> =
+    (U extends unknown ? (k: U) => void : never) extends ((k: infer I) => void) ? I : never;