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-no-concepts
11 // UNSUPPORTED: gcc-10
12 // UNSUPPORTED: libcpp-has-no-incomplete-ranges
13 
14 // template<class T>
15 // concept sized_range;
16 
17 #include <ranges>
18 
19 #include "test_iterators.h"
20 
21 namespace stdr = std::ranges;
22 
23 static_assert(stdr::sized_range<int[5]>);
24 static_assert(stdr::sized_range<int (&)[5]>);
25 static_assert(!stdr::sized_range<int (&)[]>);
26 static_assert(!stdr::sized_range<int[]>);
27 
28 struct range_has_size {
29   bidirectional_iterator<int*> begin();
30   bidirectional_iterator<int*> end();
31   int size();
32 };
33 static_assert(stdr::sized_range<range_has_size>);
34 static_assert(!stdr::sized_range<range_has_size const>);
35 
36 struct range_has_const_size {
37   bidirectional_iterator<int*> begin();
38   bidirectional_iterator<int*> end();
39   int size() const;
40 };
41 static_assert(stdr::sized_range<range_has_const_size>);
42 static_assert(!stdr::sized_range<range_has_const_size const>);
43 
44 struct const_range_has_size {
45   bidirectional_iterator<int*> begin() const;
46   bidirectional_iterator<int*> end() const;
47   int size();
48 };
49 static_assert(stdr::sized_range<const_range_has_size>);
50 static_assert(stdr::range<const_range_has_size const>);
51 static_assert(!stdr::sized_range<const_range_has_size const>);
52 
53 struct const_range_has_const_size {
54   bidirectional_iterator<int*> begin() const;
55   bidirectional_iterator<int*> end() const;
56   int size() const;
57 };
58 static_assert(stdr::sized_range<const_range_has_const_size>);
59 static_assert(stdr::sized_range<const_range_has_const_size const>);
60 
61 struct sized_sentinel_range_has_size {
62   int* begin();
63   int* end();
64 };
65 static_assert(stdr::sized_range<sized_sentinel_range_has_size>);
66 static_assert(!stdr::sized_range<sized_sentinel_range_has_size const>);
67 
68 struct const_sized_sentinel_range_has_size {
69   int* begin() const;
70   int* end() const;
71 };
72 static_assert(stdr::sized_range<const_sized_sentinel_range_has_size>);
73 static_assert(stdr::sized_range<const_sized_sentinel_range_has_size const>);
74 
75 struct non_range_has_size {
76   int size() const;
77 };
78 static_assert(requires(non_range_has_size const x) { stdr::size(x); });
79 static_assert(!stdr::sized_range<non_range_has_size>);
80 static_assert(!stdr::sized_range<non_range_has_size const>);
81