From d0879d4d4ed103265f5e05cf07ae350a2b59a678 Mon Sep 17 00:00:00 2001
From: Rich Harris <richard.a.harris@gmail.com>
Date: Tue, 5 Jan 2016 11:10:13 -0500
Subject: [PATCH] =?UTF-8?q?handle=20calls=20to=20default=20exports=20other?=
 =?UTF-8?q?=20than=20function=20expressions=20=E2=80=93=20fixes=20#421?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 src/Declaration.js                                 | 10 ++++++++--
 test/function/default-exports-in-parens/_config.js |  3 +++
 test/function/default-exports-in-parens/foo.js     |  3 +++
 test/function/default-exports-in-parens/main.js    |  3 +++
 4 files changed, 17 insertions(+), 2 deletions(-)
 create mode 100644 test/function/default-exports-in-parens/_config.js
 create mode 100644 test/function/default-exports-in-parens/foo.js
 create mode 100644 test/function/default-exports-in-parens/main.js

diff --git a/src/Declaration.js b/src/Declaration.js
index ef10b7f..e1d5ef9 100644
--- a/src/Declaration.js
+++ b/src/Declaration.js
@@ -110,9 +110,15 @@ export class SyntheticDefaultDeclaration {
 			return this.original.run( strongDependencies );
 		}
 
-		if ( /FunctionExpression/.test( this.node.declaration.type ) ) {
-			return run( this.node.declaration.body, this.statement.scope, this.statement, strongDependencies, false );
+		let declaration = this.node.declaration;
+		while ( declaration.type === 'ParenthesizedExpression' ) declaration = declaration.expression;
+
+		if ( /FunctionExpression/.test( declaration.type ) ) {
+			return run( declaration.body, this.statement.scope, this.statement, strongDependencies, false );
 		}
+
+		// otherwise assume the worst
+		return true;
 	}
 
 	use () {
diff --git a/test/function/default-exports-in-parens/_config.js b/test/function/default-exports-in-parens/_config.js
new file mode 100644
index 0000000..1855ab2
--- /dev/null
+++ b/test/function/default-exports-in-parens/_config.js
@@ -0,0 +1,3 @@
+module.exports = {
+	description: 'handles default function exports wrapped in parens'
+};
diff --git a/test/function/default-exports-in-parens/foo.js b/test/function/default-exports-in-parens/foo.js
new file mode 100644
index 0000000..b052a6b
--- /dev/null
+++ b/test/function/default-exports-in-parens/foo.js
@@ -0,0 +1,3 @@
+export default (function () {
+  global.answer = 42;
+});
diff --git a/test/function/default-exports-in-parens/main.js b/test/function/default-exports-in-parens/main.js
new file mode 100644
index 0000000..9511c19
--- /dev/null
+++ b/test/function/default-exports-in-parens/main.js
@@ -0,0 +1,3 @@
+import foo from './foo.js';
+foo();
+assert.equal( global.answer, 42 );