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 | // template<class R, class Pred> |
12 | // drop_while_view(R&&, Pred) -> drop_while_view<views::all_t<R>, Pred>; |
13 | |
14 | #include <cassert> |
15 | #include <ranges> |
16 | #include <utility> |
17 | |
18 | struct Container { |
19 | int* begin() const; |
20 | int* end() const; |
21 | }; |
22 | |
23 | struct View : std::ranges::view_base { |
24 | int* begin() const; |
25 | int* end() const; |
26 | }; |
27 | |
28 | struct Pred { |
29 | bool operator()(int i) const; |
30 | }; |
31 | |
32 | bool pred(int); |
33 | |
34 | static_assert(std::is_same_v<decltype(std::ranges::drop_while_view(Container{}, Pred{})), |
35 | std::ranges::drop_while_view<std::ranges::owning_view<Container>, Pred>>); |
36 | |
37 | static_assert(std::is_same_v<decltype(std::ranges::drop_while_view(View{}, pred)), // |
38 | std::ranges::drop_while_view<View, bool (*)(int)>>); |
39 | |
40 | static_assert(std::is_same_v<decltype(std::ranges::drop_while_view(View{}, Pred{})), // |
41 | std::ranges::drop_while_view<View, Pred>>); |
42 | |
43 | void testRef() { |
44 | Container c{}; |
45 | Pred p{}; |
46 | static_assert(std::is_same_v<decltype(std::ranges::drop_while_view(c, p)), |
47 | std::ranges::drop_while_view<std::ranges::ref_view<Container>, Pred>>); |
48 | } |
49 | |