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
18constexpr 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
41int main(int, char**) {
42 test();
43 static_assert(test());
44
45 return 0;
46}
47

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