From 3a7396ea1c5f17c414ea55051266746f15a857db Mon Sep 17 00:00:00 2001
From: Nathan Shively-Sanders <nathansa@microsoft.com>
Date: Tue, 21 Jun 2016 15:55:55 -0700
Subject: [PATCH] For optionality, check question token before JSDoc

---
 src/compiler/checker.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
index d083548242a..b3f7c488ffb 100644
--- a/src/compiler/checker.ts
+++ b/src/compiler/checker.ts
@@ -4417,7 +4417,7 @@ namespace ts {
         }
 
         function isOptionalParameter(node: ParameterDeclaration) {
-            if (isJSDocOptionalParameter(node) || hasQuestionToken(node)) {
+            if (hasQuestionToken(node) || isJSDocOptionalParameter(node)) {
                 return true;
             }