lokinet/llarp/util/variant.hpp

#ifndef LLARP_VARIANT_HPP
#define LLARP_VARIANT_HPP

#include <absl/types/variant.h>

namespace llarp
{
  namespace util
  {
    template < typename... Ts >
    struct _overloaded;

    template < typename T, typename... Ts >
    struct _overloaded<T, Ts...> : T, _overloaded<Ts...>
    {
      _overloaded(T&& t, Ts&&... ts) : T(t), _overloaded<Ts...>(std::forward<Ts>(ts)...) {}
      using T::operator();

      using _overloaded< Ts... >::operator();
    };

    template<typename T>
    struct _overloaded<T> : T
    {
      _overloaded(T&& t) : T(t) {}

      using T::operator();
    };

    template < typename... Ts >
    constexpr auto overloaded(Ts&&... ts)->_overloaded< Ts... >
    {
      return _overloaded<Ts...>(std::forward<Ts>(ts)...);
    }

  }  // namespace util
}  // namespace llarp

#endif