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 // class std::ranges::lazy_split_view::outer-iterator::value_type;
13 
14 #include <ranges>
15 
16 #include <cassert>
17 #include <concepts>
18 #include "../types.h"
19 
20 using V = ValueTypeForward;
21 static_assert(std::ranges::forward_range<V>);
22 static_assert(std::ranges::view<V>);
23 
24 static_assert(std::is_base_of_v<std::ranges::view_interface<ValueTypeForward>, ValueTypeForward>);
25 
26 constexpr bool test() {
27   // empty()
28   {
29     {
30       SplitViewForward v("abc def", " ");
31       auto val = *v.begin();
32       assert(!val.empty());
33     }
34 
35     {
36       SplitViewForward v;
37       auto val = *v.begin();
38       assert(val.empty());
39     }
40   }
41 
42   // operator bool()
43   {
44     {
45       SplitViewForward v("abc def", " ");
46       auto val = *v.begin();
47       assert(val);
48     }
49 
50     {
51       SplitViewForward v;
52       auto val = *v.begin();
53       assert(!val);
54     }
55   }
56 
57   // front()
58   {
59     SplitViewForward v("abc def", " ");
60     auto val = *v.begin();
61     assert(val.front() == 'a');
62   }
63 
64   return true;
65 }
66 
67 int main(int, char**) {
68   test();
69   static_assert(test());
70 
71   return 0;
72 }
73