30 Time library [time]

30.8 The civil calendar [time.cal]

30.8.5 Class year [time.cal.year]

30.8.5.2 Member functions [time.cal.year.members]

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constexpr explicit year(int y) noexcept;
1
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Effects: Initializes y_ with y.
The value held is unspecified if y is not in the range [-32767, 32767].
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constexpr year& operator++() noexcept;
2
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Effects: ++y_.
3
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Returns: *this.
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constexpr year operator++(int) noexcept;
4
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Effects: ++(*this).
5
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Returns: A copy of *this as it existed on entry to this member function.
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constexpr year& operator--() noexcept;
6
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Effects: --y_.
7
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Returns: *this.
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constexpr year operator--(int) noexcept;
8
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Effects: --(*this).
9
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Returns: A copy of *this as it existed on entry to this member function.
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constexpr year& operator+=(const years& y) noexcept;
10
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Effects: *this = *this + y.
11
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Returns: *this.
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constexpr year& operator-=(const years& y) noexcept;
12
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Effects: *this = *this - y.
13
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Returns: *this.
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constexpr year operator+() const noexcept;
14
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Returns: *this.
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constexpr year operator-() const noexcept;
15
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Returns: year{-y_}.
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constexpr bool is_leap() const noexcept;
16
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Returns: y_ % 4 == 0 && (y_ % 100 != 0 || y_ % 400 == 0).
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constexpr explicit operator int() const noexcept;
17
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Returns: y_.
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constexpr bool ok() const noexcept;
18
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Returns: min().y_ <= y_ && y_ <= max().y_.
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static constexpr year min() noexcept;
19
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Returns: year{-32767}.
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static constexpr year max() noexcept;
20
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Returns: year{32767}.