pun_cast.hpp

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//          Copyright RedPortal, mujjingun 2017 - 2018.
// Distributed under the Boost Software License, Version 1.0.
//    (See accompanying file LICENSE or copy at
//          http://www.boost.org/LICENSE_1_0.txt)

#ifndef _MGCPP_PUN_CAST_HPP_
#define _MGCPP_PUN_CAST_HPP_

#include <type_traits>

namespace mgcpp {
template <typename To, typename From>
inline To pun_cast(From const* from) {
  union pun_t {
    From src;
    typename std::remove_pointer<To>::type dst;
  };
  return &(reinterpret_cast<pun_t const*>(from))->dst;
}

template <typename To, typename From>
inline To pun_cast(From* from) {
  union pun_t {
    From src;
    typename std::remove_pointer<To>::type dst;
  };
  return &(reinterpret_cast<pun_t*>(from))->dst;
}
}  // namespace mgcpp

#endif