variantvisitresultstd.hpp

The following code example is taken from the book
C++ Templates - The Complete Guide, 2nd Edition
by David Vandevoorde, Nicolai M. Josuttis, and Douglas Gregor,
Addison-Wesley, 2017
© Copyright David Vandevoorde, Nicolai M. Josuttis, Douglas Gregor 2017


template<typename Visitor, typename... ElementTypes>
class VisitResultT<ComputedResultType, Visitor, ElementTypes...>
{
 public:
  using Type =
    std::common_type_t<VisitElementResult<Visitor, ElementTypes>...>;
};