C++ - Filtering tuple by type

filter-by-type-tuple.cpp

#include <iostream>
#include <vector>
#include <tuple>
#include <typeinfo>

template<class... Tp>
std::vector<int*> GetData(std::tuple<Tp...>&& t)
{
	std::vector<int*> accumulator;

	std::apply([&] (const auto&... tupleArgs) 
	{
	 	auto processTuple = [&](const auto& x)
	 	{
	 	    //int* s;
	 	    //std::cout << typeid(x).name() << std::endl;
	 	    //std::cout << typeid(s).name() << std::endl;
	 		//if constexpr (std::is_same<decltype(x), int*>::value)
	 		if constexpr (std::is_same<typename std::decay<decltype(x)>::type,int*>::value)
	 			accumulator.push_back(x);
	 	};
	 	(processTuple(tupleArgs), ...);
	 }, t);

	return accumulator;
}

int main()
{
    int*i;int*p; int k = 6; int q = 9; i = &k; p = &q;
    std::vector<int*> vector = GetData(std::make_tuple(i, "hello", p));
    for (const auto v : vector)
        std::cout << *v << std::endl;
    return 0;
}