C++ 产生UUID

#include <iostream>
#include <sstream>
#include <iomanip>
#include <chrono>
#include <functional>
#include <random>
std::string create_uuid()
{
    std::stringstream stream;
    auto random_seed = std::chrono::system_clock::now().time_since_epoch().count();
    std::mt19937 seed_engine(random_seed);
    std::uniform_int_distribution<std::size_t> random_gen ;
    std::size_t value = random_gen(seed_engine);
    stream << std::hex << value;
    
    return stream.str();
}

 利用当前时钟，产生随机数，产生uuid