boost::movelib::make_unique_nothrow
// In header: <boost/move/make_unique.hpp> template<typename T> unique_ptr< ( n);
Remarks: This function shall not participate in overload resolution unless T is an array of unknown bound.
Returns: unique_ptr<T>(new (std::nothrow)remove_extent_t<T>[n]()) (value initialization)
unique_ptr<T>(new (std::nothrow)remove_extent_t<T>[n]())