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 // lazy_split_view() requires default_initializable<V> && default_initializable<P> = default;
12
13 #include <ranges>
14
15 #include <cassert>
16 #include "types.h"
17
18 struct ThrowingDefaultCtorForwardView : std::ranges::view_base {
19 ThrowingDefaultCtorForwardView() noexcept(false);
20 forward_iterator<int*> begin() const;
21 forward_iterator<int*> end() const;
22 };
23
24 struct NoDefaultCtorForwardView : std::ranges::view_base {
25 NoDefaultCtorForwardView() = delete;
26 forward_iterator<int*> begin() const;
27 forward_iterator<int*> end() const;
28 };
29
30 static_assert( std::is_default_constructible_v<std::ranges::lazy_split_view<ForwardView, ForwardView>>);
31 static_assert(!std::is_default_constructible_v<std::ranges::lazy_split_view<NoDefaultCtorForwardView, ForwardView>>);
32 static_assert(!std::is_default_constructible_v<std::ranges::lazy_split_view<ForwardView, NoDefaultCtorForwardView>>);
33
34 static_assert( std::is_nothrow_default_constructible_v<std::ranges::lazy_split_view<ForwardView, ForwardView>>);
35 static_assert(!std::is_nothrow_default_constructible_v<ThrowingDefaultCtorForwardView>);
36 static_assert(!std::is_nothrow_default_constructible_v<
37 std::ranges::lazy_split_view<ThrowingDefaultCtorForwardView, ForwardView>>);
38
test()39 constexpr bool test() {
40 {
41 std::ranges::lazy_split_view<CopyableView, ForwardView> v;
42 assert(v.base() == CopyableView());
43 }
44
45 {
46 std::ranges::lazy_split_view<CopyableView, ForwardView> v = {};
47 assert(v.base() == CopyableView());
48 }
49
50 return true;
51 }
52
main(int,char **)53 int main(int, char**) {
54 test();
55 static_assert(test());
56
57 return 0;
58 }
59