1 files changed, 42 insertions, 0 deletions
diff --git a/tools/eslint/lib/rules/wrap-iife.js b/tools/eslint/lib/rules/wrap-iife.js
new file mode 100644
index 0000000000..eb3c5d1dc3
--- /dev/null
+++ b/tools/eslint/lib/rules/wrap-iife.js
@@ -0,0 +1,42 @@
+/**
+ * @fileoverview Rule to flag when IIFE is not wrapped in parens
+ * @author Ilya Volodin
+ * @copyright 2013 Ilya Volodin. All rights reserved.
+ */
+
+"use strict";
+
+//------------------------------------------------------------------------------
+// Rule Definition
+//------------------------------------------------------------------------------
+
+module.exports = function(context) {
+
+    var style = context.options[0] || "outside";
+
+    function wrapped(node) {
+        var previousToken = context.getTokenBefore(node),
+            nextToken = context.getTokenAfter(node);
+        return previousToken && previousToken.value === "(" &&
+            nextToken && nextToken.value === ")";
+    }
+
+    return {
+
+        "CallExpression": function(node) {
+            if (node.callee.type === "FunctionExpression") {
+                var callExpressionWrapped = wrapped(node),
+                    functionExpressionWrapped = wrapped(node.callee);
+
+                if (!callExpressionWrapped && !functionExpressionWrapped) {
+                    context.report(node, "Wrap an immediate function invocation in parentheses.");
+                } else if (style === "inside" && !functionExpressionWrapped) {
+                    context.report(node, "Wrap only the function expression in parens.");
+                } else if (style === "outside" && !callExpressionWrapped) {
+                    context.report(node, "Move the invocation into the parens that contain the function.");
+                }
+            }
+        }
+    };
+
+};