cppfront/regression-tests/mixed-forwarding.cpp2 at main · MaxSagebaum/cppfront · GitHub

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#include <iostream>

#include <utility>

struct X {

int i;

X(int i) : i{ i} { std::cout << "+X " << i << "\n"; }

X(X const& that) : i{that.i} { std::cout << "copy X " << i << "\n"; }

X(X && that) : i{that.i} { std::cout << "move X " << i << "\n"; }

};

copy_from: (copy _) = { }

use: (_) = {}

// invoking each of these with an rvalue std::pair argument ...

apply_implicit_forward: (forward t: std::pair<X, X>) = {

copy_from(t.first); // copies

copy_from(t.second); // moves

}

apply_explicit_forward: (forward t: std::pair<X, X>) = {

copy_from(forward t.first); // moves

copy_from(forward t.second); // moves

}

main: ()->int = {

t1: std::pair<X,X> = (1,2);

apply_implicit_forward(t1);

use(t1);

apply_implicit_forward(t1);

t2: std::pair<X,X> = (3,4);

apply_explicit_forward(t2);

use(t2);

apply_explicit_forward(t2);

}

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