empty returns no longer return null

lib/nodes.js

@@ -112,7 +112,7 @@
     BaseNode.prototype.eachChild = function(func) {
       var _i, _j, _len, _len2, _ref2, _ref3, _result, attr, child;
       if (!(this.children)) {
-        return null;
+        return;
       }
       _result = []; _ref2 = this.children;
       for (_i = 0, _len = _ref2.length; _i < _len; _i++) {
@@ -122,7 +122,7 @@
           for (_j = 0, _len2 = _ref3.length; _j < _len2; _j++) {
             child = _ref3[_j];
             if (func(child) === false) {
-              return null;
+              return;
             }
           }
         }
@@ -286,18 +286,23 @@
     ReturnNode.prototype.children = ['expression'];
     ReturnNode.prototype.makeReturn = THIS;
     ReturnNode.prototype.compile = function(o) {
-      var expr;
-      expr = this.expression.makeReturn();
-      if (!(expr instanceof ReturnNode)) {
+      var _ref2, expr;
+      expr = (((_ref2 = this.expression) != null) ? _ref2.makeReturn() : undefined);
+      if (expr && (!(expr instanceof ReturnNode))) {
         return expr.compile(o);
       }
       return ReturnNode.__super__.compile.call(this, o);
     };
     ReturnNode.prototype.compileNode = function(o) {
-      if (this.expression.isStatement(o)) {
-        o.asStatement = true;
+      var expr;
+      expr = '';
+      if (this.expression) {
+        if (this.expression.isStatement(o)) {
+          o.asStatement = true;
+        }
+        expr = ' ' + this.expression.compile(o);
       }
-      return "" + (this.tab) + "return " + (this.expression.compile(o)) + ";";
+      return "" + (this.tab) + "return" + expr + ";";
     };
     return ReturnNode;
   })();
@@ -426,7 +431,7 @@
         ifnode = node.unfoldSoak(o);
       }
       if (!(ifnode)) {
-        return null;
+        return;
       }
       parent[name] = ifnode.body;
       ifnode.body = new ValueNode(parent);