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// class std::ranges::subrange;
12
13#include <ranges>
14
15#include <cassert>
16#include "test_macros.h"
17#include "test_iterators.h"
18#include "types.h"
19
20constexpr bool test() {
21 std::ranges::subrange<int*> a(globalBuff, globalBuff + 8, 8);
22 auto a1 = a.next();
23 assert(a1.begin() == globalBuff + 1);
24 assert(a1.size() == 7);
25 auto a5 = a.next(5);
26 assert(a5.begin() == globalBuff + 5);
27 assert(a5.size() == 3);
28 auto a4 = a5.prev();
29 assert(a4.begin() == globalBuff + 4);
30 assert(a4.size() == 4);
31
32 std::ranges::subrange<InputIter, sentinel_wrapper<InputIter>> b(InputIter(globalBuff), sentinel_wrapper(InputIter(globalBuff + 8)));
33 auto b1 = std::move(b).next();
34 assert(base(b1.begin()) == globalBuff + 1);
35
36 std::ranges::subrange<BidirIter> c(BidirIter(globalBuff + 4), BidirIter(globalBuff + 8));
37 auto c1 = c.prev();
38 assert(base(c1.begin()) == globalBuff + 3);
39 auto c2 = c.prev(4);
40 assert(base(c2.begin()) == globalBuff);
41
42 std::ranges::subrange<BidirIter> d(BidirIter(globalBuff + 4), BidirIter(globalBuff + 8));
43 auto d1 = d.advance(4);
44 assert(base(d1.begin()) == globalBuff + 8);
45 assert(d1.empty());
46 auto d2 = d1.advance(-4);
47 assert(base(d2.begin()) == globalBuff + 4);
48
49 return true;
50}
51
52int main(int, char**) {
53 test();
54 static_assert(test());
55
56 return 0;
57}
58

source code of libcxx/test/std/ranges/range.utility/range.subrange/advance.pass.cpp