public:

static_assert(std::is_trivial<T>::value && std::is_standard_layout<T>::value,

"T must be POD");

PODArray()

: ptr_() {}

explicit PODArray(int len)

: ptr_(std::allocator<T>().allocate(len), Deleter(len)) {}

T* data() const {

return ptr_.get();

}

int size() const {

return ptr_.get_deleter().len_;

}

T& operator[](int pos) const {

return ptr_[pos];

}

private:

struct Deleter {

Deleter()

: len_(0) {}

explicit Deleter(int len)

: len_(len) {}

void operator()(T* ptr) const {

std::allocator<T>().deallocate(ptr, len_);

}

int len_;

};

std::unique_ptr<T[], Deleter> ptr_;