metapp::TypeList is a template that holds a list of types.
For any end user, you only need to know how to construct a TypeList.
#include "metapp/utilities/typelist.h"TL1 is a type list of int and char.
using TL1 = metapp::TypeList<int, char>;TL2 is a type list of std::string, std::vector<int>, bool, long, and double.
using TL2 = metapp::TypeList<std::string, std::vector<int>, bool, long, double>;TypeList is used when declaring meta type. The UpType can be a TypeList, and implementing cast and castFrom
can use TypeList.
See document of DeclareMetaType for more details