25 Time library [time]

25.8 The civil calendar [time.cal]

25.8.11 Class month_weekday [time.cal.mwd]

25.8.11.1 Overview [time.cal.mwd.overview]

namespace std::chrono {
  class month_weekday {
    chrono::month           m_;         // exposition only
    chrono::weekday_indexed wdi_;       // exposition only
  public:
    constexpr month_weekday(const chrono::month& m, const chrono::weekday_indexed& wdi) noexcept;

    constexpr chrono::month           month()           const noexcept;
    constexpr chrono::weekday_indexed weekday_indexed() const noexcept;
    constexpr bool ok() const noexcept;
  };
}

month_weekday represents the

n^{th}

weekday of a month, of an as yet unspecified year.

To do this the month_weekday stores a month and a weekday_indexed.

[ Example

constexpr auto mwd
    = February/Tueday[3];               // mwd is the third Tuesday of February of an as yet unspecified year
static_assert(mwd.month() == February);
static_assert(mwd.weekday_indexed() == Tueday[3]);

— end example

]

month_weekday is a trivially copyable and standard-layout class type.

25.8.11.2 Member functions [time.cal.mwd.members]

🔗

constexpr month_weekday(const chrono::month& m, const chrono::weekday_indexed& wdi) noexcept;

Effects: Constructs an object of type month_weekday by initializing m_ with m, and wdi_ with wdi.

🔗

constexpr chrono::month month() const noexcept;

Returns: m_.

🔗

constexpr chrono::weekday_indexed weekday_indexed() const noexcept;

Returns: wdi_.

🔗

constexpr bool ok() const noexcept;

Returns: m_.ok() && wdi_.ok().

25.8.11.3 Non-member functions [time.cal.mwd.nonmembers]

🔗

constexpr bool operator==(const month_weekday& x, const month_weekday& y) noexcept;

Returns: x.month() == y.month() && x.weekday_indexed() == y.weekday_indexed().

🔗

template<class charT, class traits>
  basic_ostream<charT, traits>&
    operator<<(basic_ostream<charT, traits>& os, const month_weekday& mwd);