Return error message to JS for invalid parameter cases instead of return undefined.

[DonnaWuDongxia]

We need to return the error message for invalid parameter cases.

NAN_METHOD(NanInstance::setCameraOptions) {
auto myself = ObjectWrap::Unwrap(info.Holder());

info.GetReturnValue().Set(Nan::Undefined());

if (info.Length() == 1 && ((info[0]->IsObject()))) {
// Method: name = setCameraOptions, taking 1 argument(s)

auto arg0 = EXTRACT_v8_object(info[0]);

// Return promise
myself->impl_->SetJavaScriptThis(info.This());
auto promise = myself->impl_->setCameraOptions(arg0);
info.GetReturnValue().Set(promise);

} // Closing bracket of 'if (info.Length() == 1)'

else {
// TODO: handle no-match by modifying template nanCxxImplMethod.def
}
}

[kenny-y]

Guess we need to make an exception here to make promise be rejected.

[minggangw]

I think the proper solution is:
a) If the number of args is lager OR equal than being requested, then ignore the extra ones.
b) If the number of args is less than being requested, then return a promise and reject.

[minggangw]

I found another case that when you pass an invalid param which is an enum, the generated code will check if the value in one of the valid ones, if not a 'TypeError' will be thrown instead of rejecting the promise.

    const char* VALID_ENUM_OPTIONTYPE_INFO0[] = { "color_backlight_compensation", .....
    ThrowIfEnumValueNotValid(arg0, VALID_ENUM_OPTIONTYPE_INFO0, option, OptionType);