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-has-no-incomplete-ranges
11 
12 // drop_view() requires default_initializable<V> = default;
13 
14 #include <ranges>
15 
16 #include "test_macros.h"
17 #include "types.h"
18 
19 constexpr bool test() {
20   std::ranges::drop_view<MoveOnlyView> dropView1;
21   assert(std::ranges::begin(dropView1) == globalBuff);
22 
23   static_assert( std::is_default_constructible_v<std::ranges::drop_view<ForwardView>>);
24   static_assert(!std::is_default_constructible_v<std::ranges::drop_view<NoDefaultCtorForwardView>>);
25 
26   LIBCPP_STATIC_ASSERT( std::is_nothrow_default_constructible_v<std::ranges::drop_view<ForwardView>>);
27   static_assert(!std::is_nothrow_default_constructible_v<ThrowingDefaultCtorForwardView>);
28   static_assert(!std::is_nothrow_default_constructible_v<std::ranges::drop_view<ThrowingDefaultCtorForwardView>>);
29 
30   return true;
31 }
32 
33 int main(int, char**) {
34   test();
35   static_assert(test());
36 
37   return 0;
38 }
39