1 files changed, 36 insertions, 0 deletions
diff --git a/tools/eslint/lib/rules/wrap-regex.js b/tools/eslint/lib/rules/wrap-regex.js
new file mode 100644
index 0000000000..e2cc7d2253
--- /dev/null
+++ b/tools/eslint/lib/rules/wrap-regex.js
@@ -0,0 +1,36 @@
+/**
+ * @fileoverview Rule to flag when regex literals are not wrapped in parens
+ * @author Matt DuVall <http://www.mattduvall.com>
+ */
+
+"use strict";
+
+//------------------------------------------------------------------------------
+// Rule Definition
+//------------------------------------------------------------------------------
+
+module.exports = function(context) {
+
+    return {
+
+        "Literal": function(node) {
+            var token = context.getFirstToken(node),
+                nodeType = token.type,
+                source,
+                grandparent,
+                ancestors;
+
+            if (nodeType === "RegularExpression") {
+                source = context.getTokenBefore(node);
+                ancestors = context.getAncestors();
+                grandparent = ancestors[ancestors.length - 1];
+
+                if (grandparent.type === "MemberExpression" && grandparent.object === node &&
+                    (!source || source.value !== "(")) {
+                    context.report(node, "Wrap the regexp literal in parens to disambiguate the slash.");
+                }
+            }
+        }
+    };
+
+};