From b699e4f2aa2685ff7c0a45540da6ac0ecb3b04cf Mon Sep 17 00:00:00 2001
From: Sebastian McKenzie <sebmck@gmail.com>
Date: Sat, 16 May 2015 23:17:03 +0100
Subject: [PATCH] add support for type cast expressions - fixes
 babel/babel-eslint#102

---
 eslint/babel-eslint-parser/acorn-to-esprima.js    | 4 ++++
 eslint/babel-eslint-parser/test/non-regression.js | 8 ++++++++
 2 files changed, 12 insertions(+)

diff --git a/eslint/babel-eslint-parser/acorn-to-esprima.js b/eslint/babel-eslint-parser/acorn-to-esprima.js
index ea6222e3ee..d43e96494e 100644
--- a/eslint/babel-eslint-parser/acorn-to-esprima.js
+++ b/eslint/babel-eslint-parser/acorn-to-esprima.js
@@ -171,6 +171,10 @@ var astTransformVisitor = {
       delete node.argument;
     }
 
+    if (t.isTypeCastExpression(node)) {
+      return node.expression;
+    }
+
     if (t.isFlow(node)) {
       return this.remove();
     }
diff --git a/eslint/babel-eslint-parser/test/non-regression.js b/eslint/babel-eslint-parser/test/non-regression.js
index d16b71a624..99d34fb2ea 100644
--- a/eslint/babel-eslint-parser/test/non-regression.js
+++ b/eslint/babel-eslint-parser/test/non-regression.js
@@ -124,6 +124,14 @@ describe("verify", function () {
     );
   });
 
+  it("type cast expression", function () {
+    verifyAndAssertMessages(
+      "for (let a of (a: Array)) {}",
+      {},
+      []
+    );
+  });
+
   it("class usage", function () {
     verifyAndAssertMessages(
       "class Lol {} module.exports = Lol;",