22   std::get<I>(std::declval<S>());
37     ASSERT_SAME_TYPE(decltype(std::get<0>(r)), It);  in test()
38     ASSERT_SAME_TYPE(decltype(std::get<1>(r)), Sent);  in test()
39     ASSERT_SAME_TYPE(decltype(std::get<0>(static_cast<R&&>(r))), It);  in test()
40     ASSERT_SAME_TYPE(decltype(std::get<1>(static_cast<R&&>(r))), Sent);  in test()
41     ASSERT_SAME_TYPE(decltype(std::get<0>(static_cast<const R&>(r))), It);  in test()
42     ASSERT_SAME_TYPE(decltype(std::get<1>(static_cast<const R&>(r))), Sent);  in test()
43     ASSERT_SAME_TYPE(decltype(std::get<0>(static_cast<const R&&>(r))), It);  in test()
44     ASSERT_SAME_TYPE(decltype(std::get<1>(static_cast<const R&&>(r))), Sent);  in test()
45     assert(base(std::get<0>(r)) == a);                      // copy from It  in test()
46     assert(base(base(std::get<1>(r))) == a + 3);            // copy from Sent  in test()
47     assert(base(std::get<0>(std::move(r))) == a);           // copy from It  in test()
48     assert(base(base(std::get<1>(std::move(r)))) == a + 3); // copy from Sent  in test()
56     ASSERT_SAME_TYPE(decltype(std::get<0>(r)), It);  in test()
57     ASSERT_SAME_TYPE(decltype(std::get<1>(r)), Sent);  in test()
58     ASSERT_SAME_TYPE(decltype(std::get<0>(static_cast<R&&>(r))), It);  in test()
59     ASSERT_SAME_TYPE(decltype(std::get<1>(static_cast<R&&>(r))), Sent);  in test()
60     ASSERT_SAME_TYPE(decltype(std::get<0>(static_cast<const R&>(r))), It);  in test()
61     ASSERT_SAME_TYPE(decltype(std::get<1>(static_cast<const R&>(r))), Sent);  in test()
62     ASSERT_SAME_TYPE(decltype(std::get<0>(static_cast<const R&&>(r))), It);  in test()
63     ASSERT_SAME_TYPE(decltype(std::get<1>(static_cast<const R&&>(r))), Sent);  in test()
64     assert(base(std::get<0>(r)) == a);                      // copy from It  in test()
65     assert(base(base(std::get<1>(r))) == a + 3);            // copy from Sent  in test()
66     assert(base(std::get<0>(std::move(r))) == a);           // copy from It  in test()
67     assert(base(base(std::get<1>(std::move(r)))) == a + 3); // copy from Sent  in test()
77     ASSERT_SAME_TYPE(decltype(std::get<1>(r)), Sent);  in test()
78     ASSERT_SAME_TYPE(decltype(std::get<0>(static_cast<R&&>(r))), It);  in test()
79     ASSERT_SAME_TYPE(decltype(std::get<1>(static_cast<R&&>(r))), Sent);  in test()
81     ASSERT_SAME_TYPE(decltype(std::get<1>(static_cast<const R&>(r))), Sent);  in test()
83     ASSERT_SAME_TYPE(decltype(std::get<1>(static_cast<const R&&>(r))), Sent);  in test()
84     assert(base(base(std::get<1>(r))) == a + 3);            // copy from Sent  in test()
85     assert(base(std::get<0>(std::move(r))) == a);           // move from It  in test()
86     assert(base(base(std::get<1>(std::move(r)))) == a + 3); // copy from Sent  in test()