30 Time library [time]

30.8 The civil calendar [time.cal]

30.8.3 Class day [time.cal.day]

30.8.3.2 Member functions [time.cal.day.members]

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constexpr explicit day(unsigned d) noexcept;
1
#
Effects: Initializes d_ with d.
The value held is unspecified if d is not in the range [0, 255].
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constexpr day& operator+() noexcept;
2
#
Returns: *this.
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constexpr day operator+(int) noexcept;
4
#
Returns: A copy of *this as it existed on entry to this member function.
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constexpr day& operator-() noexcept;
6
#
Returns: *this.
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constexpr day operator-(int) noexcept;
8
#
Returns: A copy of *this as it existed on entry to this member function.
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constexpr day& operator+=(const days& d) noexcept;
10
#
Returns: *this.
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constexpr day& operator-=(const days& d) noexcept;
12
#
Returns: *this.
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constexpr explicit operator unsigned() const noexcept;
14
#
Returns: d_.
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constexpr bool ok() const noexcept;
15
#
Returns: 1 <= d_ && d_ <= 31.

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