Separate class expressions from class declarations and their symbols like defuns

lib/parse.js

@@ -856,7 +856,7 @@ function parse($TEXT, options) {
                 return for_();
 
               case "class":
-                return class_();
+                return class_(AST_DefClass);
 
               case "function":
                 return function_(AST_Defun);
@@ -1379,7 +1379,7 @@ function parse($TEXT, options) {
         }
         if (is("keyword", "class")) {
             next();
-            var cls = class_();
+            var cls = class_(AST_ClassExpression);
             cls.start = start;
             cls.end = prev();
             return subscripts(cls, allow_calls);
@@ -1497,11 +1497,15 @@ function parse($TEXT, options) {
         return new AST_Object({ properties: a })
     });
 
-    function class_() {
+    function class_(KindOfClass) {
         var start, method, class_name, name, extends_, a = [];
 
         if (S.token.type == "name" && S.token.value != "extends") {
-            class_name = as_symbol(AST_SymbolClassName)
+            class_name = as_symbol(KindOfClass === AST_DefClass ? AST_SymbolDefClass : AST_SymbolClass);
+        }
+
+        if (KindOfClass === AST_DefClass && !class_name) {
+            croak();
         }
 
         if (S.token.value == "extends") {
@@ -1523,7 +1527,7 @@ function parse($TEXT, options) {
 
         next();
 
-        return new AST_Class({
+        return new KindOfClass({
             start: start,
             name: class_name,
             extends: extends_,