[api] Expose FunctionCallbackInfo::NewTarget

include/v8.h

Index: include/v8.h
diff --git a/include/v8.h b/include/v8.h
index 51fb1330614237fe6a1e735d9ff5d44798fd552e..ce217fdca41f0d405b0297043903a613bb71a169 100644
--- a/include/v8.h
+++ b/include/v8.h
@@ -3192,12 +3192,13 @@ class FunctionCallbackInfo {
                           Local<Function> Callee() const);
   V8_INLINE Local<Object> This() const;
   V8_INLINE Local<Object> Holder() const;
+  V8_INLINE Local<Value> NewTarget() const;
   V8_INLINE bool IsConstructCall() const;
   V8_INLINE Local<Value> Data() const;
   V8_INLINE Isolate* GetIsolate() const;
   V8_INLINE ReturnValue<T> GetReturnValue() const;
   // This shouldn't be public, but the arm compiler needs it.
-  static const int kArgsLength = 7;
+  static const int kArgsLength = 8;
 
  protected:
   friend class internal::FunctionCallbackArguments;
@@ -3209,15 +3210,13 @@ class FunctionCallbackInfo {
   static const int kDataIndex = 4;
   static const int kCalleeIndex = 5;
   static const int kContextSaveIndex = 6;
+  static const int kNewTargetIndex = 7;
 
   V8_INLINE FunctionCallbackInfo(internal::Object** implicit_args,
-                   internal::Object** values,
-                   int length,
-                   bool is_construct_call);
+                                 internal::Object** values, int length);
   internal::Object** implicit_args_;
   internal::Object** values_;
   int length_;
-  int is_construct_call_;
 };
 
 
@@ -7865,17 +7864,11 @@ internal::Object* ReturnValue<T>::GetDefaultValue() {
   return value_[-1];
 }
 
-
-template<typename T>
+template <typename T>
 FunctionCallbackInfo<T>::FunctionCallbackInfo(internal::Object** implicit_args,
                                               internal::Object** values,
-                                              int length,
-                                              bool is_construct_call)
-    : implicit_args_(implicit_args),
-      values_(values),
-      length_(length),
-      is_construct_call_(is_construct_call) { }
-
+                                              int length)
+    : implicit_args_(implicit_args), values_(values), length_(length) {}
 
 template<typename T>
 Local<Value> FunctionCallbackInfo<T>::operator[](int i) const {
@@ -7903,8 +7896,13 @@ Local<Object> FunctionCallbackInfo<T>::Holder() const {
       &implicit_args_[kHolderIndex]));
 }
 
+template <typename T>
+Local<Value> FunctionCallbackInfo<T>::NewTarget() const {
+  return Local<Value>(
+      reinterpret_cast<Value*>(&implicit_args_[kNewTargetIndex]));
+}
 
-template<typename T>
+template <typename T>
 Local<Value> FunctionCallbackInfo<T>::Data() const {
   return Local<Value>(reinterpret_cast<Value*>(&implicit_args_[kDataIndex]));
 }
@@ -7924,7 +7922,7 @@ ReturnValue<T> FunctionCallbackInfo<T>::GetReturnValue() const {
 
 template<typename T>
 bool FunctionCallbackInfo<T>::IsConstructCall() const {
-  return is_construct_call_ & 0x1;
+  return !NewTarget()->IsUndefined();
 }