any class any; (since C++17) The class any describes a type-safe container for single values of any type. (1) An object of class any stores an instance of any type that satisfies the constructor requirements or is empty, and this is referred to as th…
tuple Class template std::tuple is a fixed-size collection of heterogeneous values. It is a generalization of std::pair. 可以用来在bind中存储函数指针和参数 实现思路 不定参数模板 + 模板偏特化 tuple作为一个存储不定参数模板的类,分为一下几种偏特化形式: template<> struct tuple<> {}; template<typenam…