tmp/tmp0toi5iqo/{from.md → to.md}
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| 1 |
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### General <a id="time.point.general">[[time.point.general]]</a>
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``` cpp
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namespace std::chrono {
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template<class Clock, class Duration = typename Clock::duration>
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class time_point {
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public:
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using clock = Clock;
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using duration = Duration;
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using rep = typename duration::rep;
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using period = typename duration::period;
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private:
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duration d_; // exposition only
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public:
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// [time.point.cons], construct
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constexpr time_point(); // has value epoch
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constexpr explicit time_point(const duration& d); // same as time_point() + d
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template<class Duration2>
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constexpr time_point(const time_point<clock, Duration2>& t);
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// [time.point.observer], observer
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constexpr duration time_since_epoch() const;
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// [time.point.arithmetic], arithmetic
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constexpr time_point& operator++();
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constexpr time_point operator++(int);
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constexpr time_point& operator--();
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constexpr time_point operator--(int);
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constexpr time_point& operator+=(const duration& d);
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constexpr time_point& operator-=(const duration& d);
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// [time.point.special], special values
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static constexpr time_point min() noexcept;
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static constexpr time_point max() noexcept;
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};
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}
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```
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If `Duration` is not a specialization of `duration`, the program is
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ill-formed.
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