From cae12cb144cfb6954227251b0bd14f387046076a Mon Sep 17 00:00:00 2001
From: Nathan Shively-Sanders <nathansa@microsoft.com>
Date: Thu, 19 Oct 2017 09:13:31 -0700
Subject: [PATCH] Fix getParameterSymbolFromJSDoc

---
 src/compiler/utilities.ts | 15 +++++++++++++--
 1 file changed, 13 insertions(+), 2 deletions(-)

diff --git a/src/compiler/utilities.ts b/src/compiler/utilities.ts
index 980a8cc61c4..5bc8e78f749 100644
--- a/src/compiler/utilities.ts
+++ b/src/compiler/utilities.ts
@@ -1606,8 +1606,19 @@ namespace ts {
             return undefined;
         }
         const name = node.name.escapedText;
-        const func = getJSDocHost(node);
-        if (!isFunctionLike(func)) {
+        const decl = getJSDocHost(node);
+        let func: FunctionLike;
+        if (isExpressionStatement(decl) && isBinaryExpression(decl.expression) && isFunctionLike(decl.expression.right)) {
+            func = decl.expression.right;
+        }
+        else if (isVariableStatement(decl) && decl.declarationList.declarations.length === 1 && isVariableDeclaration(decl.declarationList.declarations[0])
+                 && isFunctionLike(decl.declarationList.declarations[0].initializer)) {
+            func = decl.declarationList.declarations[0].initializer as FunctionLike;
+        }
+        else if (isFunctionLike(decl)) {
+            func = decl;
+        }
+        else {
             return undefined;
         }
         const parameter = find(func.parameters, p =>