20     Proxy<int> p{5};  in testProxy()
27     Proxy<int&> p{i};  in testProxy()
34     Proxy<int&> p1{i};  in testProxy()
35     Proxy<int> p2 = p1;  in testProxy()
38     Proxy<int&> p3{p2};  in testProxy()
42     Proxy<MoveOnly&&> p4 = std::move(m1);  in testProxy()
44     Proxy<MoveOnly> p5 = std::move(p4);  in testProxy()
50     Proxy<int> p1{5};  in testProxy()
51     Proxy<int> p2{6};  in testProxy()
56     Proxy<MoveOnly&&> p3 = std::move(m1);  in testProxy()
57     Proxy<MoveOnly> p4{MoveOnly{9}};  in testProxy()
63     Proxy<int&> p5{i};  in testProxy()
65     p5 = Proxy<int&>{j};  in testProxy()
68     const Proxy<int&> p_ref{k};  in testProxy()
72     Proxy<int&> px{x};  in testProxy()
81     const Proxy<int&> p1{i};  in testProxy()
82     const Proxy<int&> p2{j};  in testProxy()
88     Proxy<MoveOnly&&> p3       = std::move(m1);  in testProxy()
89     const Proxy<MoveOnly&&> p4 = std::move(m2);  in testProxy()
96     Proxy<int> p1{5};  in testProxy()
97     Proxy<int> p2{6};  in testProxy()
103     Proxy<int&> p_ref{i};  in testProxy()
104     Proxy<const int&> p_cref{j};  in testProxy()
136   std::same_as<Proxy<int&>> decltype(auto) result = *iter;  in testInputIteratorOperation()
189   std::same_as<Proxy<int&>> decltype(auto) r = iter[2];  in testRandomAccessIteratorOperation()