lib/less/js/lib/less/tree/keyword.js in less-2.0.8 vs lib/less/js/lib/less/tree/keyword.js in less-2.0.9

@@ -1,9 +1,19 @@
 (function (tree) {
 
 tree.Keyword = function (value) { this.value = value };
 tree.Keyword.prototype = {
     eval: function () { return this },
-    toCSS: function () { return this.value }
+    toCSS: function () { return this.value },
+    compare: function (other) {
+        if (other instanceof tree.Keyword) {
+            return other.value === this.value ? 0 : 1;
+        } else {
+            return -1;
+        }
+    }
 };
+
+tree.True = new(tree.Keyword)('true');
+tree.False = new(tree.Keyword)('false');
 
 })(require('../tree'));