27 Time library [time]

27.5 Class template duration [time.duration]

27.5.4 Arithmetic [time.duration.arithmetic]

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constexpr common_type_t<duration> operator+() const;
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Returns: common_­type_­t<duration>(*this).
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constexpr common_type_t<duration> operator-() const;
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Returns: common_­type_­t<duration>(-rep_­).
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constexpr duration& operator++();
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Effects: Equivalent to: ++rep_­.
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Returns: *this.
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constexpr duration operator++(int);
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Effects: Equivalent to: return duration(rep_­++);
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constexpr duration& operator--();
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Effects: Equivalent to: --rep_­.
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Returns: *this.
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constexpr duration operator--(int);
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Effects: Equivalent to: return duration(rep_­--);
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constexpr duration& operator+=(const duration& d);
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Effects: Equivalent to: rep_­ += d.count().
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Returns: *this.
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constexpr duration& operator-=(const duration& d);
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Effects: Equivalent to: rep_­ -= d.count().
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Returns: *this.
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constexpr duration& operator*=(const rep& rhs);
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Effects: Equivalent to: rep_­ *= rhs.
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Returns: *this.
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constexpr duration& operator/=(const rep& rhs);
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Effects: Equivalent to: rep_­ /= rhs.
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Returns: *this.
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constexpr duration& operator%=(const rep& rhs);
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Effects: Equivalent to: rep_­ %= rhs.
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Returns: *this.
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constexpr duration& operator%=(const duration& rhs);
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Effects: Equivalent to: rep_­ %= rhs.count().
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Returns: *this.