new classes: assert that constructors are not callable and rewrite 'return;'

src/globals.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_GLOBALS_H_
 #define V8_GLOBALS_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 779 matching lines @@
 enum Signedness { kSigned, kUnsigned };
 
 
 enum FunctionKind {
   kNormalFunction = 0,
   kArrowFunction = 1,
   kGeneratorFunction = 2,
   kConciseMethod = 4,
   kConciseGeneratorMethod = kGeneratorFunction | kConciseMethod,
   kDefaultConstructor = 8,
-  kSubclassConstructor = 16
+  kBaseConstructor = 16,
+  kSubclassConstructor = 32,
 };
 
 
 inline bool IsValidFunctionKind(FunctionKind kind) {
   return kind == FunctionKind::kNormalFunction ||
          kind == FunctionKind::kArrowFunction ||
          kind == FunctionKind::kGeneratorFunction ||
          kind == FunctionKind::kConciseMethod ||
          kind == FunctionKind::kConciseGeneratorMethod ||
          kind == FunctionKind::kDefaultConstructor ||
+         kind == FunctionKind::kBaseConstructor ||
          kind == FunctionKind::kSubclassConstructor;
 }
 
 
 inline bool IsArrowFunction(FunctionKind kind) {
   DCHECK(IsValidFunctionKind(kind));
   return kind & FunctionKind::kArrowFunction;
 }
 
 
 inline bool IsGeneratorFunction(FunctionKind kind) {
   DCHECK(IsValidFunctionKind(kind));
   return kind & FunctionKind::kGeneratorFunction;
 }
 
 
 inline bool IsConciseMethod(FunctionKind kind) {
   DCHECK(IsValidFunctionKind(kind));
   return kind & FunctionKind::kConciseMethod;
 }
 
 
 inline bool IsDefaultConstructor(FunctionKind kind) {
   DCHECK(IsValidFunctionKind(kind));
   return kind & FunctionKind::kDefaultConstructor;
 }
 
+
+inline bool IsBaseConstructor(FunctionKind kind) {
+  DCHECK(IsValidFunctionKind(kind));
+  return kind & FunctionKind::kBaseConstructor;
+}
+
+
 inline bool IsSubclassConstructor(FunctionKind kind) {
   DCHECK(IsValidFunctionKind(kind));
   return kind & FunctionKind::kSubclassConstructor;
 }
+
+
+inline bool IsConstructor(FunctionKind kind) {
+  DCHECK(IsValidFunctionKind(kind));
+  return kind &
+         (FunctionKind::kBaseConstructor | FunctionKind::kSubclassConstructor |
+          FunctionKind::kDefaultConstructor);
+}
 } }  // namespace v8::internal
 
 namespace i = v8::internal;
 
 #endif  // V8_GLOBALS_H_