#include <iostream>
#include <variant>
#include <string>
 
int main() {
    std::variant<int, std::string> data = "C++ Standard";
 
    // std::visit handles the control flow based on the active type
    std::visit([](auto&& arg) {
        using T = std::decay_t<decltype(arg)>;
        if constexpr (std::is_same_v<T, int>) {
            std::cout << "Integer: " << arg << std::endl;
        } else if constexpr (std::is_same_v<T, std::string>) {
            std::cout << "String: " << arg << std::endl;
        }
    }, data);
 
    return 0;
}