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 // class std::ranges::subrange;
13 
14 #include <ranges>
15 
16 #include <cassert>
17 #include "test_macros.h"
18 #include "test_iterators.h"
19 #include "types.h"
20 
21 constexpr bool test() {
22   std::ranges::subrange<int*> a(globalBuff, globalBuff + 8, 8);
23   auto a1 = a.next();
24   assert(a1.begin() == globalBuff + 1);
25   assert(a1.size() == 7);
26   auto a5 = a.next(5);
27   assert(a5.begin() == globalBuff + 5);
28   assert(a5.size() == 3);
29   auto a4 = a5.prev();
30   assert(a4.begin() == globalBuff + 4);
31   assert(a4.size() == 4);
32 
33   std::ranges::subrange<InputIter, sentinel_wrapper<InputIter>> b(InputIter(globalBuff), sentinel_wrapper(InputIter(globalBuff + 8)));
34   auto b1 = std::move(b).next();
35   assert(base(b1.begin()) == globalBuff + 1);
36 
37   std::ranges::subrange<BidirIter> c(BidirIter(globalBuff + 4), BidirIter(globalBuff + 8));
38   auto c1 = c.prev();
39   assert(base(c1.begin()) == globalBuff + 3);
40   auto c2 = c.prev(4);
41   assert(base(c2.begin()) == globalBuff);
42 
43   std::ranges::subrange<BidirIter> d(BidirIter(globalBuff + 4), BidirIter(globalBuff + 8));
44   auto d1 = d.advance(4);
45   assert(base(d1.begin()) == globalBuff + 8);
46   assert(d1.empty());
47   auto d2 = d1.advance(-4);
48   assert(base(d2.begin()) == globalBuff + 4);
49 
50   return true;
51 }
52 
53 int main(int, char**) {
54   test();
55   static_assert(test());
56 
57   return 0;
58 }
59