He's really SSL-encrypted

#include <iostream>
#include <functional>

using namespace std;

function<int(void)> gen();

int main(int argc, char **argv){
    function<int(void)> a = gen();
    cout << ([](int a){
        return a;
    }(a()));
    return 0;
}

function<int(void)> gen(){
    return ([]{ return 4; });
}