checkpoint

lib/ast.js

@@ -104,16 +104,11 @@ AST_Node.warn = function(txt, props) {
         AST_Node.warn_function(string_template(txt, props));
 };
 
-var AST_Debugger = DEFNODE("Debugger", null, {
-    $documentation: "Represents a debugger statement"
-});
+/* -----[ statements ]----- */
 
-var AST_Directive = DEFNODE("Directive", "value", {
-    $documentation: "Represents a directive, like \"use strict\";"
+var AST_StatementBase = DEFNODE("StatementBase", null, {
 });
 
-/* -----[ loops ]----- */
-
 var AST_Statement = DEFNODE("Statement", "body", {
     $documentation: "Base class of all statements",
     _walk: function(visitor) {
@@ -121,7 +116,15 @@ var AST_Statement = DEFNODE("Statement", "body", {
             this.body._walk(visitor);
         });
     }
-});
+}, AST_StatementBase);
+
+var AST_Debugger = DEFNODE("Debugger", null, {
+    $documentation: "Represents a debugger statement"
+}, AST_StatementBase);
+
+var AST_Directive = DEFNODE("Directive", "value", {
+    $documentation: "Represents a directive, like \"use strict\";"
+}, AST_StatementBase);
 
 var AST_SimpleStatement = DEFNODE("SimpleStatement", null, {
     $documentation: "A statement consisting of an expression, i.e. a = 1 + 2."
@@ -141,7 +144,8 @@ var AST_BlockStatement = DEFNODE("BlockStatement", null, {
 function walk_body(node, visitor) {
     if (node.body instanceof Array) node.body.forEach(function(stat){
         stat._walk(visitor);
-    }); else node.body._walk(visitor);
+    });
+    else if (node.body instanceof AST_Statement) node.body._walk(visitor);
 };
 
 var AST_Block = DEFNODE("Block", null, {