30 Time library [time]

30.8 The civil calendar [time.cal]

30.8.17 Class year_month_weekday_last [time.cal.ymwdlast]

30.8.17.2 Member functions [time.cal.ymwdlast.members]

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constexpr year_month_weekday_last(const chrono::year& y, const chrono::month& m, const chrono::weekday_last& wdl) noexcept;
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Effects: Initializes y_ with y, m_ with m, and wdl_ with wdl.
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constexpr year_month_weekday_last& operator+=(const months& m) noexcept;
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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]).
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Effects: *this = *this + m.
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Returns: *this.
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constexpr year_month_weekday_last& operator-=(const months& m) noexcept;
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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]).
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Effects: *this = *this - m.
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Returns: *this.
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constexpr year_month_weekday_last& operator+=(const years& y) noexcept;
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Effects: *this = *this + y.
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Returns: *this.
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constexpr year_month_weekday_last& operator-=(const years& y) noexcept;
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Effects: *this = *this - y.
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Returns: *this.
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constexpr chrono::year year() const noexcept;
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Returns: y_.
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constexpr chrono::month month() const noexcept;
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Returns: m_.
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constexpr chrono::weekday weekday() const noexcept;
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Returns: wdl_.weekday().
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constexpr chrono::weekday_last weekday_last() const noexcept;
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Returns: wdl_.
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constexpr operator sys_days() const noexcept;
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Returns: If ok() == true, returns a sys_days that represents the last weekday() of year()/month().
Otherwise the returned value is unspecified.
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constexpr explicit operator local_days() const noexcept;
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Returns: local_days{sys_days{*this}.time_since_epoch()}.
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constexpr bool ok() const noexcept;
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Returns: y_.ok() && m_.ok() && wdl_.ok().