any_container

Recently I'm studying the mordern C++ and noticed the C++ 17 new feature std::any. It's such a very powerful tool, but it's internal implementation is really complicated. I didn't see a really good and intuitive implementation on the website, so I decided to make it myself. This practice only achieves very basic std::any functionalities: move/copy and get(). The implementation is not perfect, but should give you a brief idea about how std::any is implemented.