template <typename T, typename ...Args>
bool any_of(T const v, Args&&... args) requires (sizeof...(args) > 0)
{
   return ((args == v) || ...);
}

template <typename T, typename ...Args>
bool none_of(T const v, Args&&... args) requires (sizeof...(args) > 0)
{
   return ((args != v) && ...);
}