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 // constexpr outer-iterator::value-type outer-iterator::operator*() const;
13 
14 #include <ranges>
15 
16 #include <cassert>
17 #include <string_view>
18 #include <type_traits>
19 #include "../small_string.h"
20 #include "../types.h"
21 
22 template <class View, class Separator>
23 constexpr void test_one(Separator sep) {
24   using namespace std::string_view_literals;
25 
26   View v("abc def ghi"sv, sep);
27 
28   // Non-const iterator.
29   {
30     auto i = v.begin();
31     static_assert(!std::is_reference_v<decltype(*i)>);
32     assert(SmallString(*i) == "abc"_str);
33     assert(SmallString(*(++i)) == "def"_str);
34     assert(SmallString(*(++i)) == "ghi"_str);
35   }
36 
37   // Const iterator.
38   {
39     const auto ci = v.begin();
40     static_assert(!std::is_reference_v<decltype(*ci)>);
41     assert(SmallString(*ci) == "abc"_str);
42   }
43 }
44 
45 constexpr bool test() {
46   // `View` is a forward range.
47   test_one<SplitViewDiff>(" ");
48   test_one<SplitViewInput>(' ');
49 
50   return true;
51 }
52 
53 int main(int, char**) {
54   test();
55   static_assert(test());
56 
57   return 0;
58 }
59