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 // transform_view::<iterator>::operator*
13
14 #include <ranges>
15
16 #include "test_macros.h"
17 #include "../types.h"
18
main(int,char **)19 int main(int, char**) {
20 {
21 int buff[] = {0, 1, 2, 3, 4, 5, 6, 7};
22 using View = std::ranges::transform_view<MoveOnlyView, PlusOne>;
23 View transformView(MoveOnlyView{buff}, PlusOne{});
24 assert(*transformView.begin() == 1);
25 ASSERT_NOT_NOEXCEPT(*std::declval<std::ranges::iterator_t<View>>());
26 ASSERT_SAME_TYPE(int, decltype(*std::declval<View>().begin()));
27 }
28 {
29 int buff[] = {0, 1, 2, 3, 4, 5, 6, 7};
30 using View = std::ranges::transform_view<MoveOnlyView, PlusOneMutable>;
31 View transformView(MoveOnlyView{buff}, PlusOneMutable{});
32 assert(*transformView.begin() == 1);
33 ASSERT_NOT_NOEXCEPT(*std::declval<std::ranges::iterator_t<View>>());
34 ASSERT_SAME_TYPE(int, decltype(*std::declval<View>().begin()));
35 }
36 {
37 int buff[] = {0, 1, 2, 3, 4, 5, 6, 7};
38 using View = std::ranges::transform_view<MoveOnlyView, PlusOneNoexcept>;
39 View transformView(MoveOnlyView{buff}, PlusOneNoexcept{});
40 assert(*transformView.begin() == 1);
41 LIBCPP_ASSERT_NOEXCEPT(*std::declval<std::ranges::iterator_t<View>>());
42 ASSERT_SAME_TYPE(int, decltype(*std::declval<View>().begin()));
43 }
44 {
45 int buff[] = {0, 1, 2, 3, 4, 5, 6, 7};
46 using View = std::ranges::transform_view<MoveOnlyView, Increment>;
47 View transformView(MoveOnlyView{buff}, Increment{});
48 assert(*transformView.begin() == 1);
49 ASSERT_NOT_NOEXCEPT(*std::declval<std::ranges::iterator_t<View>>());
50 ASSERT_SAME_TYPE(int&, decltype(*std::declval<View>().begin()));
51 }
52 {
53 int buff[] = {0, 1, 2, 3, 4, 5, 6, 7};
54 using View = std::ranges::transform_view<MoveOnlyView, IncrementRvalueRef>;
55 View transformView(MoveOnlyView{buff}, IncrementRvalueRef{});
56 assert(*transformView.begin() == 1);
57 ASSERT_NOT_NOEXCEPT(*std::declval<std::ranges::iterator_t<View>>());
58 ASSERT_SAME_TYPE(int&&, decltype(*std::declval<View>().begin()));
59 }
60
61 return 0;
62 }
63