std::chrono::hh_mm_ss - Man Page

using precision

constexpr hh_mm_ss (_Duration __d)
constexpr chrono::hours hours () const noexcept
constexpr bool is_negative () const noexcept
constexpr chrono::minutes minutes () const noexcept
constexpr operator precision () const noexcept
constexpr chrono::seconds seconds () const noexcept
constexpr precision subseconds () const noexcept
constexpr precision to_duration () const noexcept

static constexpr unsigned fractional_width

template<typename > struct __detail::__utc_leap_second

class std::chrono::hh_mm_ss< _Duration >"Utility for splitting a duration into hours, minutes, and seconds

This is a convenience type that provides accessors for the constituent parts (hours, minutes, seconds and subseconds) of a duration.

Since

C++20