29 Time library [time]

29.8 The civil calendar [time.cal]

29.8.12 Class month_weekday_last [time.cal.mwdlast] Overview [time.cal.mwdlast.overview]

namespace std::chrono { class month_weekday_last { chrono::month m_; // exposition only chrono::weekday_last wdl_; // exposition only public: constexpr month_weekday_last(const chrono::month& m, const chrono::weekday_last& wdl) noexcept; constexpr chrono::month month() const noexcept; constexpr chrono::weekday_last weekday_last() const noexcept; constexpr bool ok() const noexcept; }; }
month_weekday_last represents the last weekday of a month, of an as yet unspecified year.
To do this the month_weekday_last stores a month and a weekday_last.
[Example 1: constexpr auto mwd = February/Tuesday[last]; // mwd is the last Tuesday of February of an as yet unspecified year static_assert(mwd.month() == February); static_assert(mwd.weekday_last() == Tuesday[last]); — end example]
month_weekday_last is a trivially copyable and standard-layout class type.