From a9f2cb6d6e791a0c1e7d588369da4bae6811653b Mon Sep 17 00:00:00 2001
From: Nathan Shively-Sanders <nathansa@microsoft.com>
Date: Wed, 13 Jan 2016 09:31:06 -0800
Subject: [PATCH] Make `parseTypeOrTypePredicate` terser.

---
 src/compiler/parser.ts | 6 +-----
 1 file changed, 1 insertion(+), 5 deletions(-)

diff --git a/src/compiler/parser.ts b/src/compiler/parser.ts
index eaeb6452044..bfa5fb6ee1a 100644
--- a/src/compiler/parser.ts
+++ b/src/compiler/parser.ts
@@ -2541,11 +2541,7 @@ namespace ts {
         }
 
         function parseTypeOrTypePredicate(): TypeNode {
-            let typePredicateVariable: Identifier;
-            if (isIdentifier()) {
-                typePredicateVariable = tryParse(parseTypePredicatePrefix);
-            }
-
+            const typePredicateVariable = isIdentifier() && tryParse(parseTypePredicatePrefix);
             const type = parseType();
             if (typePredicateVariable) {
                 const node = <TypePredicateNode>createNode(SyntaxKind.TypePredicate, typePredicateVariable.pos);