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// transform_view::<iterator>::operator*
12
13#include <ranges>
14
15#include "test_macros.h"
16#include "../types.h"
17
18int main(int, char**) {
19 {
20 int buff[] = {0, 1, 2, 3, 4, 5, 6, 7};
21 using View = std::ranges::transform_view<MoveOnlyView, PlusOne>;
22 View transformView(MoveOnlyView{buff}, PlusOne{});
23 assert(*transformView.begin() == 1);
24 ASSERT_NOT_NOEXCEPT(*std::declval<std::ranges::iterator_t<View>>());
25 ASSERT_SAME_TYPE(int, decltype(*std::declval<View>().begin()));
26 }
27 {
28 int buff[] = {0, 1, 2, 3, 4, 5, 6, 7};
29 using View = std::ranges::transform_view<MoveOnlyView, PlusOneMutable>;
30 View transformView(MoveOnlyView{buff}, PlusOneMutable{});
31 assert(*transformView.begin() == 1);
32 ASSERT_NOT_NOEXCEPT(*std::declval<std::ranges::iterator_t<View>>());
33 ASSERT_SAME_TYPE(int, decltype(*std::declval<View>().begin()));
34 }
35 {
36 int buff[] = {0, 1, 2, 3, 4, 5, 6, 7};
37 using View = std::ranges::transform_view<MoveOnlyView, PlusOneNoexcept>;
38 View transformView(MoveOnlyView{buff}, PlusOneNoexcept{});
39 assert(*transformView.begin() == 1);
40 LIBCPP_ASSERT_NOEXCEPT(*std::declval<std::ranges::iterator_t<View>>());
41 ASSERT_SAME_TYPE(int, decltype(*std::declval<View>().begin()));
42 }
43 {
44 int buff[] = {0, 1, 2, 3, 4, 5, 6, 7};
45 using View = std::ranges::transform_view<MoveOnlyView, Increment>;
46 View transformView(MoveOnlyView{buff}, Increment{});
47 assert(*transformView.begin() == 1);
48 ASSERT_NOT_NOEXCEPT(*std::declval<std::ranges::iterator_t<View>>());
49 ASSERT_SAME_TYPE(int&, decltype(*std::declval<View>().begin()));
50 }
51 {
52 int buff[] = {0, 1, 2, 3, 4, 5, 6, 7};
53 using View = std::ranges::transform_view<MoveOnlyView, IncrementRvalueRef>;
54 View transformView(MoveOnlyView{buff}, IncrementRvalueRef{});
55 assert(*transformView.begin() == 1);
56 ASSERT_NOT_NOEXCEPT(*std::declval<std::ranges::iterator_t<View>>());
57 ASSERT_SAME_TYPE(int&&, decltype(*std::declval<View>().begin()));
58 }
59
60 return 0;
61}
62

source code of libcxx/test/std/ranges/range.adaptors/range.transform/iterator/deref.pass.cpp