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// common_view() requires default_initializable<V> = default;
12
13#include <ranges>
14
15#include <cassert>
16#include <concepts>
17
18#include "test_iterators.h"
19#include "types.h"
20
21int main(int, char**) {
22 static_assert(!std::default_initializable<std::ranges::common_view<MoveOnlyView>>);
23 static_assert( std::default_initializable<std::ranges::common_view<DefaultConstructibleView>>);
24
25 std::ranges::common_view<DefaultConstructibleView> common;
26 assert(common.begin() == nullptr);
27 assert(common.end() == nullptr);
28
29 return 0;
30}
31

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