From f7eac73a6f2e72470c581c62857e4ea7263e871e Mon Sep 17 00:00:00 2001
From: Ryan Cavanaugh <RyanCavanaugh@users.noreply.github.com>
Date: Wed, 3 Feb 2016 00:09:38 -0800
Subject: [PATCH] Recognize `=` as equivalent to `?` in JSDoc signatures

Fixes #6811
---
 src/compiler/parser.ts                            |  3 +++
 tests/cases/fourslash/jsDocFunctionSignatures2.ts | 12 ++++++++++++
 2 files changed, 15 insertions(+)
 create mode 100644 tests/cases/fourslash/jsDocFunctionSignatures2.ts

diff --git a/src/compiler/parser.ts b/src/compiler/parser.ts
index b6ba02b987c..9fcc2ec34d6 100644
--- a/src/compiler/parser.ts
+++ b/src/compiler/parser.ts
@@ -5727,6 +5727,9 @@ namespace ts {
             function parseJSDocParameter(): ParameterDeclaration {
                 const parameter = <ParameterDeclaration>createNode(SyntaxKind.Parameter);
                 parameter.type = parseJSDocType();
+                if (parseOptional(SyntaxKind.EqualsToken)) {
+                    parameter.questionToken = createNode(SyntaxKind.QuestionToken);
+                }
                 return finishNode(parameter);
             }
 
diff --git a/tests/cases/fourslash/jsDocFunctionSignatures2.ts b/tests/cases/fourslash/jsDocFunctionSignatures2.ts
new file mode 100644
index 00000000000..174ea7d6560
--- /dev/null
+++ b/tests/cases/fourslash/jsDocFunctionSignatures2.ts
@@ -0,0 +1,12 @@
+///<reference path="fourslash.ts" />
+
+// @allowNonTsExtensions: true
+// @Filename: Foo.js
+
+//// /** @type {function(string, boolean=): number} */
+//// var f6;
+//// 
+//// f6('', /**/false)
+
+goTo.marker();
+verify.currentSignatureHelpIs('f6(p0: string, p1?: boolean): number')