30 Time library [time]

30.8 The civil calendar [time.cal]

30.8.12 Class month_weekday_last [time.cal.mwdlast]

30.8.12.1 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; }; }
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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.
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[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]
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month_weekday_last is a trivially copyable and standard-layout class type.

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

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

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

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