Make throwing exception when parsing args easier

native_mate/arguments.cc

@@ -32,17 +32,25 @@ v8::Handle<v8::Value> Arguments::PeekNext() const {
   return (*info_)[next_];
 }
 
-void Arguments::ThrowError() const {
+v8::Handle<v8::Value> Arguments::ThrowError() const {
   if (insufficient_arguments_)
     return ThrowTypeError("Insufficient number of arguments.");
 
-  ThrowTypeError(base::StringPrintf(
+  return ThrowTypeError(base::StringPrintf(
       "Error processing argument %d.", next_ - 1));
 }
 
-void Arguments::ThrowTypeError(const std::string& message) const {
+v8::Handle<v8::Value> Arguments::ThrowError(const std::string& message) const {
+  MATE_THROW_EXCEPTION(isolate_, v8::Exception::Error(
+      StringToV8(isolate_, message)));
+  return MATE_UNDEFINED(isolate_);
+}
+
+v8::Handle<v8::Value> Arguments::ThrowTypeError(
+    const std::string& message) const {
   MATE_THROW_EXCEPTION(isolate_, v8::Exception::TypeError(
       StringToV8(isolate_, message)));
+  return MATE_UNDEFINED(isolate_);
 }
 
 }  // namespace mate

native_mate/arguments.h

@@ -73,8 +73,9 @@ class Arguments {
 
   v8::Handle<v8::Value> PeekNext() const;
 
-  void ThrowError() const;
-  void ThrowTypeError(const std::string& message) const;
+  v8::Handle<v8::Value> ThrowError() const;
+  v8::Handle<v8::Value> ThrowError(const std::string& message) const;
+  v8::Handle<v8::Value> ThrowTypeError(const std::string& message) const;
 
   v8::Isolate* isolate() const { return isolate_; }