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 // static constexpr size_t size() noexcept;
13
14 #include <ranges>
15 #include <cassert>
16
17 #include "test_macros.h"
18
test()19 constexpr bool test() {
20 {
21 auto sv = std::ranges::single_view<int>(42);
22 assert(sv.size() == 1);
23
24 ASSERT_SAME_TYPE(decltype(sv.size()), size_t);
25 static_assert(noexcept(sv.size()));
26 }
27 {
28 const auto sv = std::ranges::single_view<int>(42);
29 assert(sv.size() == 1);
30
31 ASSERT_SAME_TYPE(decltype(sv.size()), size_t);
32 static_assert(noexcept(sv.size()));
33 }
34 {
35 auto sv = std::ranges::single_view<int>(42);
36 assert(std::ranges::size(sv) == 1);
37
38 ASSERT_SAME_TYPE(decltype(std::ranges::size(sv)), size_t);
39 static_assert(noexcept(std::ranges::size(sv)));
40 }
41 {
42 const auto sv = std::ranges::single_view<int>(42);
43 assert(std::ranges::size(sv) == 1);
44
45 ASSERT_SAME_TYPE(decltype(std::ranges::size(sv)), size_t);
46 static_assert(noexcept(std::ranges::size(sv)));
47 }
48
49 // Test that it's static.
50 {
51 assert(std::ranges::single_view<int>::size() == 1);
52
53 ASSERT_SAME_TYPE(decltype(std::ranges::single_view<int>::size()), size_t);
54 static_assert(noexcept(std::ranges::single_view<int>::size()));
55 }
56
57 return true;
58 }
59
main(int,char **)60 int main(int, char**) {
61 test();
62 static_assert(test());
63
64 return 0;
65 }
66