Method clone

src/utilities/units/Unit.cpp:57–61

  }

  Unit Unit_Impl::clone() const {
    OS_ASSERT(system() == UnitSystem::Mixed);
    std::shared_ptr<Unit_Impl> impl(new Unit_Impl(*this));
    return Unit(impl);
  }

  Unit Unit_Impl::cloneToMixed() const {
    std::shared_ptr<Unit_Impl> impl(new Unit_Impl(*this));