From 87b0ed3042178a13a95d1f957e8a12bc28f603f2 Mon Sep 17 00:00:00 2001
From: Brian Ng <bng412@gmail.com>
Date: Wed, 18 Jan 2017 13:12:57 -0600
Subject: [PATCH] Fix parens around anonymous functions (#297)

---
 src/fast-path.js                                     |  1 +
 .../async_iteration/__snapshots__/jsfmt.spec.js.snap | 12 ++++++------
 tests/function/__snapshots__/jsfmt.spec.js.snap      |  3 +++
 tests/function/function_expression.js                |  1 +
 .../__snapshots__/jsfmt.spec.js.snap                 |  4 ++--
 5 files changed, 13 insertions(+), 8 deletions(-)

diff --git a/src/fast-path.js b/src/fast-path.js
index ca3e73e76..de8b4572d 100644
--- a/src/fast-path.js
+++ b/src/fast-path.js
@@ -373,6 +373,7 @@ FPp.needsParens = function(assumeExpressionContext) {
       }
 
       switch (parent.type) {
+        case "ExpressionStatement":
         case "MemberExpression":
         case "TaggedTemplateExpression":
         case "UnaryExpression":
diff --git a/tests/async_iteration/__snapshots__/jsfmt.spec.js.snap b/tests/async_iteration/__snapshots__/jsfmt.spec.js.snap
index 3d2a56d29..8173c5d8c 100644
--- a/tests/async_iteration/__snapshots__/jsfmt.spec.js.snap
+++ b/tests/async_iteration/__snapshots__/jsfmt.spec.js.snap
@@ -40,11 +40,11 @@ async function* delegate_yield() {
   }
   yield* inner();
 }
-async () => {
+(async () => {
   for await (const x of delegate_yield()) {
     (x: void); // error: number ~> void
   }
-};
+});
 
 async function* delegate_return() {
   async function* inner() {
@@ -197,13 +197,13 @@ async function* catch_return() {
   }
 }
 
-async () => {
+(async () => {
   catch_return().throw(\"\").then(({ value }) => {
     if (value !== undefined) {
       (value: void); // error: number ~> void
     }
   });
-};
+});
 
 async function* yield_return() {
   try {
@@ -214,12 +214,12 @@ async function* yield_return() {
   }
 }
 
-async () => {
+(async () => {
   yield_return().throw(\"\").then(({ value }) => {
     if (value !== undefined) {
       (value: void); // error: number ~> void
     }
   });
-};
+});
 "
 `;
diff --git a/tests/function/__snapshots__/jsfmt.spec.js.snap b/tests/function/__snapshots__/jsfmt.spec.js.snap
index 2cd319933..93ef91369 100644
--- a/tests/function/__snapshots__/jsfmt.spec.js.snap
+++ b/tests/function/__snapshots__/jsfmt.spec.js.snap
@@ -370,6 +370,7 @@ export default (function() {})();
 (function() {})()\`\`;
 (function() {})\`\`;
 new (function() {});
+(function() {})
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 (function() {
 }).length;
@@ -383,6 +384,8 @@ export default (function() {
 })\`\`;
 new (function() {
 })();
+(function() {
+});
 "
 `;
 
diff --git a/tests/function/function_expression.js b/tests/function/function_expression.js
index e680a3d1a..aa9c6c35f 100644
--- a/tests/function/function_expression.js
+++ b/tests/function/function_expression.js
@@ -4,3 +4,4 @@ export default (function() {})();
 (function() {})()``;
 (function() {})``;
 new (function() {});
+(function() {})
diff --git a/tests/predicates-parsing/__snapshots__/jsfmt.spec.js.snap b/tests/predicates-parsing/__snapshots__/jsfmt.spec.js.snap
index b28d1c664..e6078c8e3 100644
--- a/tests/predicates-parsing/__snapshots__/jsfmt.spec.js.snap
+++ b/tests/predicates-parsing/__snapshots__/jsfmt.spec.js.snap
@@ -112,14 +112,14 @@ var a0 = (x: mixed) => x !== null;
 
 var a1 = (x: mixed): %checks => x !== null;
 
-(x): %checks => x !== null;
+((x): %checks => x !== null);
 
 const insert_a_really_big_predicated_arrow_function_name_here = (x): %checks =>
   x !== null;
 
 declare var x;
 x;
-checks => 123;
+(checks => 123);
 
 type checks = any;