1 //===----------------------------------------------------------------------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8
9 // UNSUPPORTED: c++03, c++11, c++14, c++17
10
11 // constexpr value_type operator*() const;
12 // Effects: Equivalent to return {cur_, next_.begin()};
13
14 #include <cassert>
15 #include <ranges>
16
17 #include "../types.h"
18
19 struct Iter : ForwardIterBase<Iter> {
20 int i;
21 constexpr Iter() = default;
IterIter22 constexpr Iter(int ii) : i(ii) {}
23 };
24
test()25 constexpr bool test() {
26 using SplitView = std::ranges::split_view<std::ranges::subrange<Iter>, std::ranges::subrange<Iter>>;
27 using SplitIter = std::ranges::iterator_t<SplitView>;
28
29 {
30 SplitView sv;
31 Iter current{5};
32 std::ranges::subrange next{Iter{6}, Iter{7}};
33 const SplitIter it{sv, current, next};
34 std::same_as<std::ranges::subrange<Iter>> decltype(auto) value = *it;
35 assert(value.begin().i == 5);
36 assert(value.end().i == 6);
37 }
38
39 return true;
40 }
41
main(int,char **)42 int main(int, char**) {
43 test();
44 static_assert(test());
45
46 return 0;
47 }
48