MakeUnique.hxx

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// Check if we are building with less than C++14 and if so we need to define
// the std::make_unique() API.
#if __cplusplus < 201402L
 
#include <memory>
#include <type_traits>
#include <utility>
 
namespace std
{
 
template <typename T, typename... Args>
unique_ptr<T> make_unique_helper(false_type, Args&&... args)
{
  return unique_ptr<T>(new T(forward<Args>(args)...));
}
 
template <typename T, typename... Args>
unique_ptr<T> make_unique_helper(true_type, Args&&... args)
{
   static_assert(extent<T>::value == 0,
       "make_unique<T[N]>() is forbidden, please use make_unique<T[]>().");
 
   typedef typename remove_extent<T>::type U;
   return unique_ptr<T>(new U[sizeof...(Args)]{forward<Args>(args)...});
}
 
template <typename T, typename... Args>
unique_ptr<T> make_unique(Args&&... args)
{
   return make_unique_helper<T>(is_array<T>(), forward<Args>(args)...);
}
 
}
 
#endif // __cplusplus < 201402L