swh:1:snp:ff2a11cd2e44dd19ec3814028ef2ce6605664e63
Tip revision: b2277d76e58c14d7a672c6a8eef824d97c5a77fa authored by Eric Fischer on 17 February 2020, 22:56:11 UTC
Eliminate the separate metadata file
Eliminate the separate metadata file
Tip revision: b2277d7
variant_visitor.hpp
#ifndef MAPBOX_UTIL_VARIANT_VISITOR_HPP
#define MAPBOX_UTIL_VARIANT_VISITOR_HPP
namespace mapbox {
namespace util {
template <typename... Fns>
struct visitor;
template <typename Fn>
struct visitor<Fn> : Fn
{
using type = Fn;
using Fn::operator();
visitor(Fn fn) : Fn(fn) {}
};
template <typename Fn, typename... Fns>
struct visitor<Fn, Fns...> : Fn, visitor<Fns...>
{
using type = visitor;
using Fn::operator();
using visitor<Fns...>::operator();
visitor(Fn fn, Fns... fns) : Fn(fn), visitor<Fns...>(fns...) {}
};
template <typename... Fns>
visitor<Fns...> make_visitor(Fns... fns)
{
return visitor<Fns...>(fns...);
}
} // namespace util
} // namespace mapbox
#endif // MAPBOX_UTIL_VARIANT_VISITOR_HPP