https://www.boost.org/doc/libs/1_69_0/libs/type_traits/doc/html/boost_typetraits/reference/is_member_function_pointer.html
member function pointer
https://www.educba.com/function-pointer-in-c-plus-plus/
Guide to Function Pointer in C++. Here we discuss the working and examples of the Function Pointer in C++ along with the examples.
function pointerlearnexamples