Function operator+

util/datetime/base.h:695–697

}

constexpr TInstant operator+(const TInstant& i, const TDuration& d) noexcept {
    return TInstant::FromValue(::NDateTimeHelpers::SumWithSaturation(i.GetValue(), d.GetValue()));
}

constexpr TInstant operator-(const TInstant& i, const TDuration& d) noexcept {
    return TInstant::FromValue(::NDateTimeHelpers::DiffWithSaturation(i.GetValue(), d.GetValue()));