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 
test()19 constexpr bool test() {
20   std::ranges::transform_view<MoveOnlyView, PlusOneMutable> transformView1;
21   auto iter1 = std::move(transformView1).begin();
22   std::ranges::transform_view<MoveOnlyView, PlusOneMutable> transformView2;
23   [[maybe_unused]] auto iter2 = std::move(transformView2).begin();
24   iter1 += 4;
25   assert((iter1 + 1).base() == globalBuff + 5);
26   assert((1 + iter1).base() == globalBuff + 5);
27   assert((iter1 - 1).base() == globalBuff + 3);
28   LIBCPP_ASSERT(iter1 - iter2 == 4);
29   assert((iter1 + 2) - 2 == iter1);
30   assert((iter1 - 2) + 2 == iter1);
31 
32   return true;
33 }
34 
main(int,char **)35 int main(int, char**) {
36   test();
37   static_assert(test());
38 
39   return 0;
40 }
41