Ptr.h

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/*

             *
            ***
           *****
   *********************       Mercenaries Engineering SARL
     *****************              Copyright (C) 2018
       *************
         *********        http://www.mercenaries-engineering.com
        ***********
       ****     ****
      **           **

*/
#pragma once

#include <assert.h>
#include <memory>

namespace maquina
{

template<class T>
using Ptr = std::shared_ptr<T>;

#ifdef NDEBUG

// Fast alternative, no check
template<class To, class From>
inline Ptr<To> static_assert_cast(const Ptr<From>& p)
{
  return std::static_pointer_cast<To>(p);
}

#else

// Safe alternative, checks
template<class To, class From>
inline Ptr<To> static_assert_cast(const Ptr<From>& p)
{
  if(p == nullptr)
    return nullptr;
  Ptr<To> _p = std::dynamic_pointer_cast<To>(p);
  assert(_p);
  return std::move(_p);
}

#endif

}