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 // lazy_split_view() requires default_initializable<V> && default_initializable<P> = default;
13
14 #include <ranges>
15
16 #include <cassert>
17 #include "types.h"
18
19 struct ThrowingDefaultCtorForwardView : std::ranges::view_base {
20 ThrowingDefaultCtorForwardView() noexcept(false);
21 forward_iterator<int*> begin() const;
22 forward_iterator<int*> end() const;
23 };
24
25 struct NoDefaultCtorForwardView : std::ranges::view_base {
26 NoDefaultCtorForwardView() = delete;
27 forward_iterator<int*> begin() const;
28 forward_iterator<int*> end() const;
29 };
30
31 static_assert( std::is_default_constructible_v<std::ranges::lazy_split_view<ForwardView, ForwardView>>);
32 static_assert(!std::is_default_constructible_v<std::ranges::lazy_split_view<NoDefaultCtorForwardView, ForwardView>>);
33 static_assert(!std::is_default_constructible_v<std::ranges::lazy_split_view<ForwardView, NoDefaultCtorForwardView>>);
34
35 static_assert( std::is_nothrow_default_constructible_v<std::ranges::lazy_split_view<ForwardView, ForwardView>>);
36 static_assert(!std::is_nothrow_default_constructible_v<ThrowingDefaultCtorForwardView>);
37 static_assert(!std::is_nothrow_default_constructible_v<
38 std::ranges::lazy_split_view<ThrowingDefaultCtorForwardView, ForwardView>>);
39
test()40 constexpr bool test() {
41 {
42 std::ranges::lazy_split_view<CopyableView, ForwardView> v;
43 assert(v.base() == CopyableView());
44 }
45
46 {
47 std::ranges::lazy_split_view<CopyableView, ForwardView> v = {};
48 assert(v.base() == CopyableView());
49 }
50
51 return true;
52 }
53
main(int,char **)54 int main(int, char**) {
55 test();
56 static_assert(test());
57
58 return 0;
59 }
60