From b31233691138607462b43ecc8c78dd72436166ed Mon Sep 17 00:00:00 2001
From: Kostis Maninakis <maninak@protonmail.com>
Date: Fri, 10 Feb 2023 11:38:58 +0100
Subject: [PATCH] feat(xor): show derived types instead of type names on hover

---
 src/types/Prettify.type.ts | 7 +++++++
 src/types/Xor.type.ts      | 3 ++-
 2 files changed, 9 insertions(+), 1 deletion(-)
 create mode 100644 src/types/Prettify.type.ts

diff --git a/src/types/Prettify.type.ts b/src/types/Prettify.type.ts
new file mode 100644
index 0000000..9012eab
--- /dev/null
+++ b/src/types/Prettify.type.ts
@@ -0,0 +1,7 @@
+/**
+ * Resolve mapped types and show the derived keys and their types when hovering in
+ * VS Code, instead of just showing the names those mapped types are defined with.
+ */
+export type Prettify<T> = {
+  [K in keyof T]: T[K]
+} & {}
diff --git a/src/types/Xor.type.ts b/src/types/Xor.type.ts
index 32bb07d..2494b8b 100644
--- a/src/types/Xor.type.ts
+++ b/src/types/Xor.type.ts
@@ -1,3 +1,4 @@
+import { Prettify } from './Prettify.type'
 import { Without } from './Without.type'
 
 /**
@@ -11,5 +12,5 @@ import { Without } from './Without.type'
  * More: https://github.com/maninak/ts-xor/tree/master#description
  */
 export type XOR<T, U> = (T | U) extends object
-  ? (Without<T, U> & U) | (Without<U, T> & T)
+  ? (Prettify<Without<T, U> & U>) | (Prettify<Without<U, T> & T>)
   : T | U