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, c++20
10
11 // <ranges>
12
13 // template <class Range, class Pred>
14 // chunk_by_view(Range&&, Pred) -> chunk_by_view<views::all_t<Range>, Pred>;
15
16 #include <ranges>
17
18 #include <cassert>
19 #include <type_traits>
20
21 #include "test_iterators.h"
22
23 struct View : std::ranges::view_base {
24 View() = default;
25 forward_iterator<int*> begin() const;
26 sentinel_wrapper<forward_iterator<int*>> end() const;
27 };
28 static_assert(std::ranges::view<View>);
29
30 // A range that is not a view
31 struct Range {
32 Range() = default;
33 forward_iterator<int*> begin() const;
34 sentinel_wrapper<forward_iterator<int*>> end() const;
35 };
36 static_assert(std::ranges::range<Range>);
37 static_assert(!std::ranges::view<Range>);
38
39 struct Pred {
operator ()Pred40 constexpr bool operator()(int x, int y) const { return x <= y; }
41 };
42
test()43 constexpr bool test() {
44 {
45 View v;
46 Pred pred;
47 std::ranges::chunk_by_view view(v, pred);
48 static_assert(std::is_same_v<decltype(view), std::ranges::chunk_by_view<View, Pred>>);
49 }
50 {
51 Range r;
52 Pred pred;
53 std::ranges::chunk_by_view view(r, pred);
54 static_assert(std::is_same_v<decltype(view), std::ranges::chunk_by_view<std::ranges::ref_view<Range>, Pred>>);
55 }
56 {
57 Pred pred;
58 std::ranges::chunk_by_view view(Range{}, pred);
59 static_assert(std::is_same_v<decltype(view), std::ranges::chunk_by_view<std::ranges::owning_view<Range>, Pred>>);
60 }
61
62 return true;
63 }
64
main(int,char **)65 int main(int, char**) {
66 test();
67 static_assert(test());
68
69 return 0;
70 }
71