From c45ce61550c680c3067b1cc6b16d1b40e891eddd Mon Sep 17 00:00:00 2001
From: Sebastian McKenzie <sebmck@gmail.com>
Date: Wed, 20 May 2015 10:44:36 +0100
Subject: [PATCH] print assignment pattern shorthand with matching key nicely

---
 src/babel/generation/generators/types.js | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/babel/generation/generators/types.js b/src/babel/generation/generators/types.js
index 391a7b273f..63a2354aff 100644
--- a/src/babel/generation/generators/types.js
+++ b/src/babel/generation/generators/types.js
@@ -39,6 +39,12 @@ export function Property(node, print) {
       print(node.key);
       this.push("]");
     } else {
+      // print `({ foo: foo = 5 } = {})` as `({ foo = 5 } = {});`
+      if (t.isAssignmentPattern(node.value) && t.isIdentifier(node.key) && node.key.name === node.value.left.name) {
+        print(node.value);
+        return;
+      }
+
       print(node.key);
 
       // shorthand!