29 template <class In, class Out = In, class Sent = sentinel_wrapper<In>>
30 concept HasCopyIt = requires(In in, Sent sent, Out out) { std::ranges::copy(in, sent, out); };
42 template <class Range, class Out>
43 concept HasCopyR = requires(Range range, Out out) { std::ranges::copy(range, out); };
56 template <class In, class Out, class Sent = In>
62       std::same_as<std::ranges::in_out_result<In, Out>> auto ret =  in test_iterators()
63         std::ranges::copy(In(in.data()), Sent(In(in.data() + in.size())), Out(out.data()));  in test_iterators()
72 …std::same_as<std::ranges::in_out_result<In, Out>> auto ret = std::ranges::copy(range, Out(out.data…  in test_iterators()
83       auto ret = std::ranges::copy(In(in.data()), Sent(In(in.data() + in.size())), Out(out.data()));  in test_iterators()
91       auto ret = std::ranges::copy(range, Out(out.data()));  in test_iterators()
98 template <class In, class Out>
100   test_iterators<In, Out>();  in test_sentinels()
101   test_iterators<In, Out, sized_sentinel<In>>();  in test_sentinels()
102   test_iterators<In, Out, sentinel_wrapper<In>>();  in test_sentinels()
105 template <class Out>
107   test_iterators<cpp20_input_iterator<int*>, Out, sentinel_wrapper<cpp20_input_iterator<int*>>>();  in test_in_iterators()
108   test_sentinels<forward_iterator<int*>, Out>();  in test_in_iterators()
109   test_sentinels<bidirectional_iterator<int*>, Out>();  in test_in_iterators()
110   test_sentinels<random_access_iterator<int*>, Out>();  in test_in_iterators()
111   test_sentinels<contiguous_iterator<int*>, Out>();  in test_in_iterators()
114 template <class Out>
116 …test_iterators<ProxyIterator<cpp20_input_iterator<int*>>, Out, sentinel_wrapper<ProxyIterator<cpp2…  in test_proxy_in_iterators()
117   test_iterators<ProxyIterator<forward_iterator<int*>>, Out>();  in test_proxy_in_iterators()
118   test_iterators<ProxyIterator<bidirectional_iterator<int*>>, Out>();  in test_proxy_in_iterators()
119   test_iterators<ProxyIterator<random_access_iterator<int*>>, Out>();  in test_proxy_in_iterators()
120   test_iterators<ProxyIterator<contiguous_iterator<int*>>, Out>();  in test_proxy_in_iterators()