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#include <utility>
#include <iostream>
#include <tuple>
using namespace std;
//binding
pair<int, int> factory()
{
return { 1, 2 };
}
void fun()
{
auto [one, two] = factory();
cout << one << ' ' << two << '\n';
}
//=
//retrieve
void retrieve(int &one)
{
int two;
tie(one, two) = factory();
cout << one << ' ' << two << '\n';
}
//=
//spaceship
struct Data
{
int d_int;
string d_string;
double d_double;
};
bool operator==(Data const &lhs, Data const &rhs)
{
return tie(lhs.d_int, lhs.d_string, lhs.d_double) ==
tie(rhs.d_int, rhs.d_string, rhs.d_double);
}
partial_ordering operator<=>(Data const &lhs, Data const &rhs)
{
return tie(lhs.d_int, lhs.d_string, lhs.d_double) <=>
tie(rhs.d_int, rhs.d_string, rhs.d_double);
}
//=
int main(int argc, char **argv)
{
fun();
//stmnts
int one = 0;
int two = 0;
cout << one << ' ' << two << '\n';
retrieve(one);
cout << one << ' ' << two << '\n';
//=
}
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