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 // <ranges>
12 
13 // template<class>
14 //  inline constexpr bool enable_borrowed_range = false;
15 
16 #include <ranges>
17 #include <array>
18 #include <deque>
19 #include <forward_list>
20 #include <list>
21 #include <map>
22 #include <queue>
23 #include <set>
24 #include <stack>
25 #include <unordered_map>
26 #include <unordered_set>
27 #include <vector>
28 
29 #include "test_macros.h"
30 
31 struct S {};
32 
33 void test() {
34   using std::ranges::enable_borrowed_range;
35   static_assert(!enable_borrowed_range<char>);
36   static_assert(!enable_borrowed_range<int>);
37   static_assert(!enable_borrowed_range<double>);
38   static_assert(!enable_borrowed_range<S>);
39 
40   // Sequence containers
41   static_assert(!enable_borrowed_range<std::array<int, 0> >);
42   static_assert(!enable_borrowed_range<std::array<int, 42> >);
43   static_assert(!enable_borrowed_range<std::deque<int> >);
44   static_assert(!enable_borrowed_range<std::forward_list<int> >);
45   static_assert(!enable_borrowed_range<std::list<int> >);
46   static_assert(!enable_borrowed_range<std::vector<int> >);
47 
48   // Associative containers
49   static_assert(!enable_borrowed_range<std::set<int> >);
50   static_assert(!enable_borrowed_range<std::map<int, int> >);
51   static_assert(!enable_borrowed_range<std::multiset<int> >);
52   static_assert(!enable_borrowed_range<std::multimap<int, int> >);
53 
54   // Unordered associative containers
55   static_assert(!enable_borrowed_range<std::unordered_set<int> >);
56   static_assert(!enable_borrowed_range<std::unordered_map<int, int> >);
57   static_assert(!enable_borrowed_range<std::unordered_multiset<int> >);
58   static_assert(!enable_borrowed_range<std::unordered_multimap<int, int> >);
59 
60   // Container adaptors
61   static_assert(!enable_borrowed_range<std::stack<int> >);
62   static_assert(!enable_borrowed_range<std::queue<int> >);
63   static_assert(!enable_borrowed_range<std::priority_queue<int> >);
64 
65   // Both std::span and std::string_view have their own test.
66 }
67