From 3feeaccf5955ebf17c26ccc06f32bb39624b89f6 Mon Sep 17 00:00:00 2001
From: syuilo <syuilotan@yahoo.co.jp>
Date: Fri, 8 Sep 2017 04:13:01 +0900
Subject: Add type definition

---
 src/utils/type.ts | 3 +++
 1 file changed, 3 insertions(+)
 create mode 100644 src/utils/type.ts

(limited to 'src/utils')

diff --git a/src/utils/type.ts b/src/utils/type.ts
new file mode 100644
index 0000000000..ba6ea0be77
--- /dev/null
+++ b/src/utils/type.ts
@@ -0,0 +1,3 @@
+// https://github.com/Microsoft/TypeScript/issues/12215
+export type Diff<T extends string, U extends string> = ({ [P in T]: P } & { [P in U]: never } & { [x: string]: never })[T];
+export type Omit<T, K extends keyof T> = { [P in Diff<keyof T, K>]: T[P] };
-- 
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