#include <iostream>
#include <tuple>
#include <string> 

int main(){
  std::tuple<int,float,std::string> mytuple={1,3.1415,"one pie"};
  // structured bindings
  auto & [a,b,c] = mytuple; // get references to tuple members
  std::cout<<a<<" "<<b<<" "<<c<<std::endl;
  // std::tie with std::ignore 
  float j;
  std::string k;
  std::tie(std::ignore,j,k) = mytuple;
  std::cout<<j<<" "<<k<<std::endl;
  // same with structured bindings
  auto [dummy,a2,a3] = mytuple; // no warning about unused variable 
  std::cout<<a2<<" "<<a3<<std::endl; 
  // testing ...
  auto [aa,_,cc] = mytuple;
  std::cout<<"_="<<_<<std::endl;
}