20 General utilities library [utilities]

20.8.1.1.3 default_delete<T[]> [unique.ptr.dltr.dflt1]

namespace std {
  template <class T> struct default_delete<T[]> {
    constexpr default_delete() noexcept = default;
    void operator()(T*) const;
    template <class U> void operator()(U*) const = delete;
  };
}

void operator()(T* ptr) const;