1 files changed, 26 insertions, 0 deletions
diff --git a/tools/eslint/lib/rules/no-obj-calls.js b/tools/eslint/lib/rules/no-obj-calls.js
new file mode 100644
index 0000000000..246720c2c4
--- /dev/null
+++ b/tools/eslint/lib/rules/no-obj-calls.js
@@ -0,0 +1,26 @@
+/**
+ * @fileoverview Rule to flag use of an object property of the global object (Math and JSON) as a function
+ * @author James Allardice
+ */
+
+"use strict";
+
+//------------------------------------------------------------------------------
+// Rule Definition
+//------------------------------------------------------------------------------
+
+module.exports = function(context) {
+
+    return {
+        "CallExpression": function(node) {
+
+            if (node.callee.type === "Identifier") {
+                var name = node.callee.name;
+                if (name === "Math" || name === "JSON") {
+                    context.report(node, "'{{name}}' is not a function.", { name: name });
+                }
+            }
+        }
+    };
+
+};