From 8bbbc3a6f3282d5f953c715a655d4db3f6c39735 Mon Sep 17 00:00:00 2001
From: Lucas Azzola <derflatulator@gmail.com>
Date: Fri, 7 Jul 2017 21:02:43 +1000
Subject: [PATCH] Remove parens for type assertions in binary expressions,
 fixes #2416 (#2419)

---
 src/fast-path.js                                       |  2 +-
 tests/typescript_cast/__snapshots__/jsfmt.spec.js.snap | 10 ++++++++++
 tests/typescript_cast/parenthesis.ts                   |  5 +++++
 3 files changed, 16 insertions(+), 1 deletion(-)

diff --git a/src/fast-path.js b/src/fast-path.js
index 7d6b82a1..255f2cc1 100644
--- a/src/fast-path.js
+++ b/src/fast-path.js
@@ -305,7 +305,7 @@ FastPath.prototype.needsParens = function(options) {
 
         case "BinaryExpression":
         case "LogicalExpression": {
-          if (!node.operator) {
+          if (!node.operator && node.type !== "TSTypeAssertionExpression") {
             return true;
           }
 
diff --git a/tests/typescript_cast/__snapshots__/jsfmt.spec.js.snap b/tests/typescript_cast/__snapshots__/jsfmt.spec.js.snap
index d2810f32..d7636493 100644
--- a/tests/typescript_cast/__snapshots__/jsfmt.spec.js.snap
+++ b/tests/typescript_cast/__snapshots__/jsfmt.spec.js.snap
@@ -3,8 +3,18 @@
 exports[`parenthesis.ts 1`] = `
 <DocumentHighlightKind>(a ? b : c);
 <any>(() => {});
+
+<x>a || {};
+<x>a && [];
+true || <x>a;
+<x>a + <x>b;
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 <DocumentHighlightKind>(a ? b : c);
 <any>(() => {});
 
+<x>a || {};
+<x>a && [];
+true || <x>a;
+<x>a + <x>b;
+
 `;
diff --git a/tests/typescript_cast/parenthesis.ts b/tests/typescript_cast/parenthesis.ts
index fd356da4..38808d55 100644
--- a/tests/typescript_cast/parenthesis.ts
+++ b/tests/typescript_cast/parenthesis.ts
@@ -1,2 +1,7 @@
 <DocumentHighlightKind>(a ? b : c);
 <any>(() => {});
+
+<x>a || {};
+<x>a && [];
+true || <x>a;
+<x>a + <x>b;