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
test()18 constexpr bool test() {
19 std::ranges::transform_view<MoveOnlyView, PlusOne> transformView;
20 auto iter = std::move(transformView).begin();
21 assert((++iter).base() == globalBuff + 1);
22
23 assert((iter++).base() == globalBuff + 1);
24 assert(iter.base() == globalBuff + 2);
25
26 assert((--iter).base() == globalBuff + 1);
27 assert((iter--).base() == globalBuff + 1);
28 assert(iter.base() == globalBuff);
29
30 // Check that decltype(InputIter++) == void.
31 ASSERT_SAME_TYPE(decltype(
32 std::declval<std::ranges::iterator_t<std::ranges::transform_view<InputView, PlusOne>>>()++),
33 void);
34
35 assert((iter += 4).base() == globalBuff + 4);
36 assert((iter -= 3).base() == globalBuff + 1);
37
38 return true;
39 }
40
main(int,char **)41 int main(int, char**) {
42 test();
43 static_assert(test());
44
45 return 0;
46 }
47