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: gcc-10
12 // UNSUPPORTED: libcpp-has-no-incomplete-ranges
13 
14 // drop_view() requires default_initializable<V> = default;
15 
16 #include <ranges>
17 
18 #include "test_macros.h"
19 #include "types.h"
20 
21 constexpr bool test() {
22   std::ranges::drop_view<ContiguousView> dropView1;
23   assert(std::ranges::begin(dropView1) == globalBuff);
24 
25   static_assert( std::is_default_constructible_v<std::ranges::drop_view<ForwardView>>);
26   static_assert(!std::is_default_constructible_v<std::ranges::drop_view<NoDefaultCtorForwardView>>);
27 
28   static_assert( std::is_nothrow_default_constructible_v<std::ranges::drop_view<ForwardView>>);
29   static_assert(!std::is_nothrow_default_constructible_v<ThrowingDefaultCtorForwardView>);
30   static_assert(!std::is_nothrow_default_constructible_v<std::ranges::drop_view<ThrowingDefaultCtorForwardView>>);
31 
32   return true;
33 }
34 
35 int main(int, char**) {
36   test();
37   static_assert(test());
38 
39   return 0;
40 }
41