23 General utilities library [utilities]

23.17 Time utilities [time]

23.17.6 Class template time_­point [time.point]

23.17.6.3 time_­point arithmetic [time.point.arithmetic]

constexpr time_point& operator+=(const duration& d);
1
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Effects: As if by: d_­ += d;
2
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Returns: *this.
constexpr time_point& operator-=(const duration& d);
3
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Effects: As if by: d_­ -= d;
4
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Returns: *this.