HelenOS sources

CT                411 uspace/lib/cpp/include/__bits/chrono.hpp         using CT = common_type_t<duration<Rep1, Period1>, duration<Rep2, Period2>>;
CT                426 uspace/lib/cpp/include/__bits/chrono.hpp         using CT = common_type_t<duration<Rep1, Period1>, duration<Rep2, Period2>>;
CT                510 uspace/lib/cpp/include/__bits/chrono.hpp         using CT = time_point<Clock, common_type_t<Duration1, duration<Rep2, Period2>>>;