27 Time library [time]

27.8 The civil calendar [time.cal]

27.8.12 Class month_­weekday_­last [time.cal.mwdlast]

27.8.12.1 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.

27.8.12.2 Member functions [time.cal.mwdlast.members]

constexpr month_weekday_last(const chrono::month& m, const chrono::weekday_last& wdl) noexcept;
Effects: Initializes m_­ with m, and wdl_­ with wdl.
constexpr chrono::month month() const noexcept;
Returns: m_­.
constexpr chrono::weekday_last weekday_last() const noexcept;
Returns: wdl_­.
constexpr bool ok() const noexcept;
Returns: m_­.ok() && wdl_­.ok().

27.8.12.3 Non-member functions [time.cal.mwdlast.nonmembers]

constexpr bool operator==(const month_weekday_last& x, const month_weekday_last& y) noexcept;
Returns: x.month() == y.month() && x.weekday_­last() == y.weekday_­last().
template<class charT, class traits> basic_ostream<charT, traits>& operator<<(basic_ostream<charT, traits>& os, const month_weekday_last& mwdl);
Effects: Equivalent to: return os << format(os.getloc(), STATICALLY-WIDEN<charT>("{:L}/{:L}"), mwdl.month(), mwdl.weekday_last());