std::chrono::system_clock(3) Library Functions Manual NAME std::chrono::system_clock - System clock. SYNOPSIS #include Public Types typedef chrono::nanoseconds duration typedef duration::period period typedef duration::rep rep typedef chrono::time_point< system_clock, duration > time_point Static Public Member Functions static time_point from_time_t (std::time_t __t) noexcept static time_point now () noexcept static std::time_t to_time_t (const time_point &__t) noexcept Static Public Attributes static constexpr bool is_steady Detailed Description System clock. Time returned represents wall time from the system-wide clock. Author Generated automatically by Doxygen for libstdc++ from the source code. libstdc++ std::chrono::system_clock(3)