From be95ad00e9c73fa29e14c2aaf7006bba723d3b14 Mon Sep 17 00:00:00 2001
From: Evan You <yyx990803@gmail.com>
Date: Mon, 15 Oct 2018 19:08:19 -0400
Subject: [PATCH] chore: comments, signature

---
 packages/core/src/optional/mixin.ts | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/packages/core/src/optional/mixin.ts b/packages/core/src/optional/mixin.ts
index 152aba37..0fbd7fca 100644
--- a/packages/core/src/optional/mixin.ts
+++ b/packages/core/src/optional/mixin.ts
@@ -5,6 +5,7 @@ interface ComponentConstructor<This = Component> {
 }
 
 // mind = blown
+// https://stackoverflow.com/questions/50374908/transform-union-type-to-intersection-type
 type UnionToIntersection<U> = (U extends any
   ? (k: U) => void
   : never) extends ((k: infer I) => void)
@@ -15,10 +16,11 @@ type ExtractInstance<T> = T extends (infer U)[]
   ? UnionToIntersection<U extends ComponentConstructor<infer V> ? V : never>
   : never
 
-function mixins<T extends ComponentConstructor[], V = ExtractInstance<T>>(
-  ...args: T
-): ComponentConstructor<V>
-function mixins(...args: any[]): any {
+export function mixins<
+  T extends ComponentConstructor[],
+  V = ExtractInstance<T>
+>(...args: T): ComponentConstructor<V>
+export function mixins(...args: any[]): any {
   // TODO
 }