A std::chrono::nanoseconds issue found under MSVC.

nanosecond.cc

#include <stdio>
#include <chrono>

/* Microsoft (R) C/C++ Optimizing Compiler Version 19.00.24215.1 for x86 */

int main(int argc, char** argv)
{
    //auto _nano = std::chrono::nanoseconds(3 * 1000 * 1000 * 1000); //wrong
    auto _nano = std::chrono::duration<uint32_t, std::ratio<1, 1000000000>>(3 * 1000 * 1000 * 1000); //right

    std::cout << _nano.count() << std::endl;
}