how to get value with fieldname like protobuf in c++

[zhuxiufenghust]

No description provided.

[zhuxiufenghust]

in c++ i can get the value with name like this:
const auto reflection = pMessage->GetReflection();
std::vector<const FieldDescriptor*> fields;
pMessage->GetReflection()->ListFields(pMessage, &fields);
const auto fieldIter = std::find_if(fields.cbegin(), fields.cend(),
[&lcFieldName](const FieldDescriptor next) {
return boost::iequals(next->name(), lcFieldName);
});
if (fieldIter != fields.cend()) {
std::string result;
auto fieldDescriptor = *fieldIter;
if (!fieldDescriptor->is_repeated()) {
switch (fieldDescriptor->cpp_type()) {
case FieldDescriptor::CPPTYPE_INT32:
result = std::to_string(reflection->GetInt32 (
*pMessage, fieldDescriptor));
break;
case FieldDescriptor::CPPTYPE_INT64:
result = std::to_string(reflection->GetInt64 (
*pMessage, fieldDescriptor));
break;
case FieldDescriptor::CPPTYPE_UINT32:
result = std::to_string(reflection->GetUInt32 (
*pMessage, fieldDescriptor));
break;
case FieldDescriptor::CPPTYPE_UINT64:
result = std::to_string(reflection->GetUInt64 (
*pMessage, fieldDescriptor));
break;
case FieldDescriptor::CPPTYPE_DOUBLE:
result = std::to_string(reflection->GetDouble (
*pMessage, fieldDescriptor));
break;
case FieldDescriptor::CPPTYPE_FLOAT:
result = std::to_string(reflection->GetFloat (
*pMessage, fieldDescriptor));
break;
...
}
is there any api like GetFloat which can be used to get the message field value?

[dsnet]

Unfortunately not. What you are asking for is called protobuf reflection, which does not exist in the current API. There is a new major re-implementation of Go protobufs underway that should be released in the upcoming months. It's flagship feature is protobuf reflection.

Closing as duplicate of #364