Program Listing for File OpLibraryCoupler.hpp

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#pragma once
#ifndef SGPL_LIBRARY_OPLIBRARYCOUPLER_HPP_INCLUDE
#define SGPL_LIBRARY_OPLIBRARYCOUPLER_HPP_INCLUDE

#include <tuple>
#include <utility>

#include "OpLibrary.hpp"

namespace sgpl {

namespace internal {

// adapted from https://stackoverflow.com/a/15418923
template<typename> struct LibraryInstantiator;

template<typename ...T>
struct LibraryInstantiator<std::tuple<T...>> {
  using type = sgpl::OpLibrary<T...>;
};

} // namespace internal

template<typename Library, typename... Ops>
class OpLibraryCoupler
: public internal::LibraryInstantiator< decltype(
  std::tuple_cat(
    std::declval<typename Library::parent_t>(),
    std::declval<std::tuple<Ops...>>()
  )
) >::type
{};

} //namespace sgpl

#endif // #ifndef SGPL_LIBRARY_OPLIBRARYCOUPLER_HPP_INCLUDE