From 9bbf109dc80e7fc9f6456bfb3e2b4cd9b2b14ce9 Mon Sep 17 00:00:00 2001
From: Sebastian McKenzie <sebmck@gmail.com>
Date: Sat, 10 Jan 2015 16:24:17 +1100
Subject: [PATCH] support UpdateExpressions as MemberExpression objects - fixes
 #440

---
 lib/6to5/generation/node/parentheses.js                    | 7 +++++++
 test/fixtures/generation/types/UpdateExpression/actual.js  | 1 +
 .../fixtures/generation/types/UpdateExpression/expected.js | 1 +
 3 files changed, 9 insertions(+)

diff --git a/lib/6to5/generation/node/parentheses.js b/lib/6to5/generation/node/parentheses.js
index 8415b0c9a5..5518086e27 100644
--- a/lib/6to5/generation/node/parentheses.js
+++ b/lib/6to5/generation/node/parentheses.js
@@ -21,6 +21,13 @@ _.each([
   });
 });
 
+exports.UpdateExpression = function (node, parent) {
+  if (t.isMemberExpression(parent) && parent.object === node) {
+    // (foo++).test()
+    return true;
+  }
+};
+
 exports.ObjectExpression = function (node, parent) {
   if (t.isExpressionStatement(parent)) {
     // ({ foo: "bar" });
diff --git a/test/fixtures/generation/types/UpdateExpression/actual.js b/test/fixtures/generation/types/UpdateExpression/actual.js
index b074c6b4a1..0aba7be1a0 100644
--- a/test/fixtures/generation/types/UpdateExpression/actual.js
+++ b/test/fixtures/generation/types/UpdateExpression/actual.js
@@ -1,2 +1,3 @@
 ++i;
 i++;
+(foo++).test();
diff --git a/test/fixtures/generation/types/UpdateExpression/expected.js b/test/fixtures/generation/types/UpdateExpression/expected.js
index b074c6b4a1..0aba7be1a0 100644
--- a/test/fixtures/generation/types/UpdateExpression/expected.js
+++ b/test/fixtures/generation/types/UpdateExpression/expected.js
@@ -1,2 +1,3 @@
 ++i;
 i++;
+(foo++).test();