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
21constexpr 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
39int 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

source code of libcxx/test/std/ranges/range.adaptors/range.common.view/ctor.view.pass.cpp