25 Time library [time]

25.8 The civil calendar [time.cal]

25.8.12 Class month_­weekday_­last [time.cal.mwdlast]

25.8.12.1 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
:
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.

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

constexpr month_weekday_last(const chrono::month& m, const chrono::weekday_last& wdl) noexcept;
Effects: Constructs an object of type month_­weekday_­last by initializing 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().

25.8.12.3 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);
Returns: os << mwdl.month() << '/' << mwdl.weekday_­last().