#include <iostream>
using namespace std;
#include <iostream>
#include <tuple>
#include <vector>
#include <utility>
 
struct Foo
{
    Foo(std::tuple<int, float>)
    {
        std::cout << "Constructed a Foo from a tuple\n";
    }
 
    Foo(int, float)
    {
        std::cout << "Constructed a Foo from an int and a float\n";
    }
};
 
int main()
{
	int one = 1;
	float pi = 3.14;
    std::tuple<int, float> t(one, pi);
    std::vector<Foo> vec;
    vec.push_back(Foo(t));
 
    std::cout << "Creating p1...\n";
    // std::pair<Foo, Foo> p1(t, t);
    vec.emplace_back(one, pi);
 
    std::cout << "Creating p2...\n";
    // std::pair<Foo, Foo> p2(std::piecewise_construct, t, t);
}

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