1 files changed, 28 insertions, 0 deletions
diff --git a/tools/eslint/lib/rules/no-lonely-if.js b/tools/eslint/lib/rules/no-lonely-if.js
new file mode 100644
index 0000000000..59d807da30
--- /dev/null
+++ b/tools/eslint/lib/rules/no-lonely-if.js
@@ -0,0 +1,28 @@
+/**
+ * @fileoverview Rule to disallow if as the only statmenet in an else block
+ * @author Brandon Mills
+ */
+"use strict";
+
+//------------------------------------------------------------------------------
+// Rule Definition
+//------------------------------------------------------------------------------
+
+module.exports = function(context) {
+
+    return {
+        "IfStatement": function(node) {
+            var ancestors = context.getAncestors(),
+                parent = ancestors.pop(),
+                grandparent = ancestors.pop();
+
+            if (parent && parent.type === "BlockStatement" &&
+                    parent.body.length === 1 && grandparent &&
+                    grandparent.type === "IfStatement" &&
+                    parent === grandparent.alternate) {
+                context.report(node, "Unexpected if as the only statement in an else block.");
+            }
+        }
+    };
+
+};