Class box

include/function2/function2.hpp:374–388

/// Store the allocator inside the box
template <bool IsCopyable, typename T, typename Allocator>
struct box : private Allocator {
  friend box_factory<box>;

  T value_;

  explicit box(T value, Allocator allocator_)
      : Allocator(std::move(allocator_)), value_(std::move(value)) {
  }

  box(box&&) = default;
  box(box const&) = default;
  box& operator=(box&&) = default;
  box& operator=(box const&) = default;
  ~box() = default;
};
template <typename T, typename Allocator>
struct box<false, T, Allocator> : private Allocator {
  friend box_factory<box>;