// I have a code snippet like the following where I'm trying to use C++17 std::variant.

auto records = consumer->poll(std::chrono::milliseconds(100));
// poll returns std::vector<kafka::ConsumerRecord>

for (const auto& record : records) {
    std::variant<kafka::ConsumerRecord> var(record);
}

// And I'm getting the following error.
consumer.tcc: In instantiation of ‘int Consumer<T>::poll() [with T = myns::MyClass]’:
main.cpp:57:23: required from here
consumer.tcc:56:39: error: no matching function for call to ‘std::variant<kafka::ConsumerRecord>::variant(const kafka::ConsumerRecord&)’
56 | std::variant<kafka::ConsumerRecord> var(record);
   |                                     ^~~

/*
http://opensource.morganstanley.com/modern-cpp-kafka/doxygen/classKAFKA__API_1_1ConsumerRecord.html
*/

// So, kafka::ConsumerRecord isn't copyable. So then I tried to move it ...

for (auto& record : records) {
	std::unique_ptr<kafka::ConsumerRecord> cr(std::move(record));

	//std::unique_ptr<kafka::ConsumerRecord> cr = std::make_unique<kafka::ConsumerRecord>(record);
	//std::variant<std::unique_ptr<kafka::ConsumerRecord>> var(std::move(cr));
}

// And got this error ...
consumer.tcc:57:42: error: no matching function for call to ‘std::unique_ptr<kafka::ConsumerRecord>::unique_ptr(std::remove_reference<kafka::ConsumerRecord&>::type)’
57 | std::unique_ptr<kafka::ConsumerRecord> cr(std::move(record)); 
   |                                        ^~