一道lambda表达式题目

#include <iostream>
#include <functional>
using namespace std;
auto Pair = [](auto u, auto v) {
return [=](auto f) {
return f(u, v);
};
};
//auto First = todo;
//auto Second = todo;
auto First = [](auto p){
  //p就是对应于t
  return p([](auto u, auto v){
  return u;
  });
 };
auto Second = [](auto p){
 return p([](auto u, auto v){
  return v;
  });
};

int main(){

  auto t = Pair(1,"two");
  auto one = First(t);
  auto two = Second(t);

  cout << one <<endl;  

  cout << two << endl;

  return 0;

}