tuple_type_converter.hh

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/*
    @@@@@@@@  @@           @@@@@@   @@@@@@@@ @@
   /@@/////  /@@          @@////@@ @@////// /@@
   /@@       /@@  @@@@@  @@    // /@@       /@@
   /@@@@@@@  /@@ @@///@@/@@       /@@@@@@@@@/@@
   /@@////   /@@/@@@@@@@/@@       ////////@@/@@
   /@@       /@@/@@//// //@@    @@       /@@/@@
   /@@       @@@//@@@@@@ //@@@@@@  @@@@@@@@ /@@
   //       ///  //////   //////  ////////  //

   Copyright (c) 2016, Triad National Security, LLC
   All rights reserved.
                                                                              */
#pragma once

#include <tuple>

namespace flecsi {
namespace util {

template<typename T>
struct convert_tuple_type_ {
  using type = T;
};

template<typename... Args>
struct convert_tuple_type;

template<typename... Args>
struct convert_tuple_type<std::tuple<Args...>> {
  using type = std::tuple<typename convert_tuple_type_<Args>::type...>;
};

template<typename T, typename TO, bool E>
struct base_convert_tuple_type_ {
  using type = T;
};

template<typename T, typename TO>
struct base_convert_tuple_type_<T, TO, true> {
  using type = TO;
};

template<typename T, typename TO>
struct base_convert_tuple_type_<T, TO, false> {
  using type = T;
};

template<class B, typename TO, typename... Args>
struct base_convert_tuple_type;

template<class B, typename TO, typename... Args>
struct base_convert_tuple_type<B, TO, std::tuple<Args...>> {
  using type = std::tuple<typename base_convert_tuple_type_<Args,
    TO,
    std::is_base_of<B, Args>::value>::type...>;
};

} // namespace util
} // namespace flecsi