29 Time library [time]

29.8 The civil calendar [time.cal]

29.8.10 Class month_day_last [time.cal.mdlast]

namespace std::chrono { class month_day_last { chrono::month m_; // exposition only public: constexpr explicit month_day_last(const chrono::month& m) noexcept; constexpr chrono::month month() const noexcept; constexpr bool ok() const noexcept; }; }

month_day_last represents the last day of a month.

[Note 1:

A month_day_last object can be constructed using the expression m/last or last/m, where m is an expression of type month.

— end note]

[Example 1: constexpr auto mdl = February/last; // mdl is the last day of February of an as yet unspecified year static_assert(mdl.month() == February); — end example]

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

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constexpr explicit month_day_last(const chrono::month& m) noexcept;

Effects: Initializes m_ with m.

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constexpr month month() const noexcept;

Returns: m_.

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constexpr bool ok() const noexcept;

Returns: m_.ok().

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

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

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constexpr strong_ordering operator<=>(const month_day_last& x, const month_day_last& y) noexcept;

Returns: x.month() <=> y.month().

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template<class charT, class traits>
  basic_ostream<charT, traits>&
    operator<<(basic_ostream<charT, traits>& os, const month_day_last& mdl);

Effects: Equivalent to: return os << format(os.getloc(), STATICALLY-WIDEN<charT>("{:L}/last"), mdl.month());