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(split_view& parent, iterator_t<V> current, subrange<iterator_t<V>> next);
12
13 #include <cassert>
14 #include <ranges>
15
16 #include "../types.h"
17
18 struct TracedMoveIter : ForwardIterBase<TracedMoveIter> {
19 bool moved = false;
20
21 constexpr TracedMoveIter() = default;
22 constexpr TracedMoveIter(const TracedMoveIter&) = default;
TracedMoveIterTracedMoveIter23 constexpr TracedMoveIter(TracedMoveIter&&) : moved{true} {}
24 constexpr TracedMoveIter& operator=(TracedMoveIter&&) = default;
25 constexpr TracedMoveIter& operator=(const TracedMoveIter&) = default;
26 };
27
28 struct TracedMoveView : std::ranges::view_base {
beginTracedMoveView29 constexpr TracedMoveIter begin() const { return {}; }
endTracedMoveView30 constexpr TracedMoveIter end() const { return {}; }
31 };
32
test()33 constexpr bool test() {
34 using SplitView = std::ranges::split_view<TracedMoveView, TracedMoveView>;
35 using SplitIter = std::ranges::iterator_t<SplitView>;
36
37 SplitView sv{TracedMoveView{}, TracedMoveView{}};
38 SplitIter iter = {sv, sv.base().begin(), std::ranges::subrange<TracedMoveIter>{sv.base().begin(), sv.base().end()}};
39 assert(iter.base().moved);
40
41 auto subRange = *iter;
42 assert(subRange.begin().moved);
43 assert(subRange.end().moved);
44
45 return true;
46 }
47
main(int,char **)48 int main(int, char**) {
49 test();
50 static_assert(test());
51
52 return 0;
53 }
54