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 // UNSUPPORTED: libcpp-no-concepts
11 // UNSUPPORTED: libcpp-has-no-incomplete-ranges
12 
13 // join_view() requires default_initializable<V> = default;
14 
15 #include <cassert>
16 #include <ranges>
17 
18 #include "test_macros.h"
19 #include "types.h"
20 
21 
22 constexpr bool test() {
23   std::ranges::join_view<ParentView<ChildView>> jv;
24   assert(std::move(jv).base().ptr_ == globalChildren);
25 
26   static_assert( std::default_initializable<std::ranges::join_view<ParentView<ChildView>>>);
27   static_assert(!std::default_initializable<std::ranges::join_view<CopyableParent>>);
28 
29   return true;
30 }
31 
32 int main(int, char**) {
33   test();
34   static_assert(test());
35 
36   return 0;
37 }
38