29 Time library [time]

29.8 The civil calendar [time.cal]

29.8.11 Class month_weekday [time.cal.mwd]

29.8.11.1 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; }; }
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month_weekday represents the weekday of a month, of an as yet unspecified year.
To do this the month_weekday stores a month and a weekday_indexed.
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[Example 1: constexpr auto mwd = February/Tuesday[3]; // mwd is the third Tuesday of February of an as yet unspecified year static_assert(mwd.month() == February); static_assert(mwd.weekday_indexed() == Tuesday[3]); — end example]
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month_weekday is a trivially copyable and standard-layout class type.

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

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constexpr month_weekday(const chrono::month& m, const chrono::weekday_indexed& wdi) noexcept;
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Effects: Initializes m_ with m, and wdi_ with wdi.
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constexpr chrono::month month() const noexcept;
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Returns: m_.
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constexpr chrono::weekday_indexed weekday_indexed() const noexcept;
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Returns: wdi_.
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constexpr bool ok() const noexcept;
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Returns: m_.ok() && wdi_.ok().

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

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