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 explicit common_view(V r);
12
13 #include <ranges>
14
15 #include <cassert>
16 #include <utility>
17
18 #include "test_iterators.h"
19 #include "types.h"
20
test()21 constexpr bool test() {
22 int buf[8] = {1, 2, 3, 4, 5, 6, 7, 8};
23
24 {
25 MoveOnlyView view{buf, buf + 8};
26 std::ranges::common_view<MoveOnlyView> common(std::move(view));
27 assert(std::move(common).base().begin_ == buf);
28 }
29
30 {
31 CopyableView const view{buf, buf + 8};
32 std::ranges::common_view<CopyableView> const common(view);
33 assert(common.base().begin_ == buf);
34 }
35
36 return true;
37 }
38
main(int,char **)39 int main(int, char**) {
40 test();
41 static_assert(test());
42
43 // Can't compare common_iterator inside constexpr
44 {
45 int buf[8] = {1, 2, 3, 4, 5, 6, 7, 8};
46 MoveOnlyView view{buf, buf + 8};
47 std::ranges::common_view<MoveOnlyView> const common(std::move(view));
48 assert(common.begin() == buf);
49 }
50
51 return 0;
52 }
53