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 iterator_t<V> base() const;
12
13 #include <cassert>
14 #include <ranges>
15
16 #include "../types.h"
17
18 struct Iter : ForwardIterBase<Iter> {
19 int i;
20 constexpr Iter() = default;
IterIter21 constexpr Iter(int ii) : i(ii) {}
22 };
23
test()24 constexpr bool test() {
25 // base only has one const overload
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 // const &
30 {
31 SplitView sv;
32 const SplitIter it{sv, Iter{5}, {}};
33 std::same_as<Iter> decltype(auto) base = it.base();
34 assert(base.i == 5);
35 }
36
37 // &
38 {
39 SplitView sv;
40 SplitIter it{sv, Iter{5}, {}};
41 std::same_as<Iter> decltype(auto) base = it.base();
42 assert(base.i == 5);
43 }
44
45 // &&
46 {
47 SplitView sv;
48 SplitIter it{sv, Iter{5}, {}};
49 std::same_as<Iter> decltype(auto) base = std::move(it).base();
50 assert(base.i == 5);
51 }
52
53 // const &&
54 {
55 SplitView sv;
56 const SplitIter it{sv, Iter{5}, {}};
57 std::same_as<Iter> decltype(auto) base = std::move(it).base();
58 assert(base.i == 5);
59 }
60
61 return true;
62 }
63
main(int,char **)64 int main(int, char**) {
65 test();
66 static_assert(test());
67
68 return 0;
69 }
70