Method deep_unique_ptr

support/DeepCopy.h:64–66

    using CopyFunc = std::function<Base *(const Base *)>;

    deep_unique_ptr(std::nullptr_t val = nullptr) noexcept : _val{val}, _copy{}
    {
    }
    template <typename Derived, typename CopyFuncDerived>
    deep_unique_ptr(Derived *value, const CopyFuncDerived &copy) noexcept : _val{value}, _copy{std::move(copy)}
    {