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#pragma once

#include <cstddef>
#include <memory>
#include <type_traits>
#include <utility>

#if __cplusplus < 201402L

namespace utils {
template<class T> struct _Unique_if {
  typedef std::unique_ptr<T> _Single_object;
};

template<class T> struct _Unique_if<T[]> {
  typedef std::unique_ptr<T[]> _Unknown_bound;
};

template<class T, size_t N> struct _Unique_if<T[N]> {
  typedef void _Known_bound;
};

template<class T, class... Args>
typename _Unique_if<T>::_Single_object
make_unique(Args&&... args) {
  return std::unique_ptr<T>(new T(std::forward<Args>(args)...));
}

template<class T>
typename _Unique_if<T>::_Unknown_bound
make_unique(size_t n) {
  typedef typename std::remove_extent<T>::type U;
  return std::unique_ptr<T>(new U[n]());
}

template<class T, class... Args>
typename _Unique_if<T>::_Known_bound
make_unique(Args&&...) = delete;
}
using utils::make_unique;
#else
using std::make_unique;
#endif