30 Time library [time]

30.8 The civil calendar [time.cal]

30.8.15 Class year_month_day_last [time.cal.ymdlast]

30.8.15.3 Non-member functions [time.cal.ymdlast.nonmembers]

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constexpr bool operator=(const year_month_day_last& x, const year_month_day_last& y) noexcept;
1
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Returns: x.year() == y.year() && x.month_day_last() == y.month_day_last().
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constexpr strong_ordering operator<=>(const year_month_day_last& x, const year_month_day_last& y) noexcept;
2
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Effects: Equivalent to: if (auto c = x.year() <=> y.year(); c != 0) return c; return x.month_day_last() <=> y.month_day_last();
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constexpr year_month_day_last operator+(const year_month_day_last& ymdl, const months& dm) noexcept;
3
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Constraints: If the argument supplied by the caller for the months parameter is convertible to years, its implicit conversion sequence to years is worse than its implicit conversion sequence to months ([over.ics.rank]).
4
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Returns: (ymdl.year() / ymdl.month() + dm) / last.
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constexpr year_month_day_last operator+(const months& dm, const year_month_day_last& ymdl) noexcept;
5
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Constraints: If the argument supplied by the caller for the months parameter is convertible to years, its implicit conversion sequence to years is worse than its implicit conversion sequence to months ([over.ics.rank]).
6
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Returns: ymdl + dm.
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constexpr year_month_day_last operator-(const year_month_day_last& ymdl, const months& dm) noexcept;
7
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Constraints: If the argument supplied by the caller for the months parameter is convertible to years, its implicit conversion sequence to years is worse than its implicit conversion sequence to months ([over.ics.rank]).
8
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Returns: ymdl + (-dm).
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constexpr year_month_day_last operator+(const year_month_day_last& ymdl, const years& dy) noexcept;
9
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Returns: {ymdl.year()+dy, ymdl.month_day_last()}.
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constexpr year_month_day_last operator+(const years& dy, const year_month_day_last& ymdl) noexcept;
10
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Returns: ymdl + dy.
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constexpr year_month_day_last operator-(const year_month_day_last& ymdl, const years& dy) noexcept;
11
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Returns: ymdl + (-dy).
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template<class charT, class traits> basic_ostream<charT, traits>& operator<(basic_ostream<charT, traits>& os, const year_month_day_last& ymdl);
12
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Effects: Equivalent to: return os << format(os.getloc(), STATICALLY-WIDEN<charT>("{}/{:L}"), ymdl.year(), ymdl.month_day_last();

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