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C++ template programming
#include <iostream>
template <typename F, typename T1, typename T2>
void flip2(F f, T1 &&t1, T2 &&t2)
f(t2, t1);
void g(int &&i, int &j)
cout << i << " " << j << endl;
int main(void)
int i = 1;
flip2(g, i, 42);
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