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 "types.h"
16#include <cassert>
17#include "test_macros.h"
18#include "test_iterators.h"
19
20static_assert( std::is_constructible_v<ForwardSubrange, ForwardBorrowedRange>); // Default case.
21static_assert(!std::is_constructible_v<ForwardSubrange, ForwardRange>); // Not borrowed.
22// Iter convertible to sentinel (pointer) type.
23static_assert( std::is_constructible_v<ConvertibleForwardSubrange, ConvertibleForwardBorrowedRange>);
24// Where neither iter or sentinel are pointers, but they are different.
25static_assert( std::is_constructible_v<DifferentSentinelSubrange, ForwardBorrowedRangeDifferentSentinel>);
26static_assert( std::is_constructible_v<DifferentSentinelWithSizeMemberSubrange, DifferentSentinelWithSizeMember>);
27
28constexpr bool test() {
29 ForwardSubrange a{ForwardBorrowedRange()};
30 assert(base(a.begin()) == globalBuff);
31 assert(base(a.end()) == globalBuff + 8);
32
33 ConvertibleForwardSubrange b{ConvertibleForwardBorrowedRange()};
34 assert(b.begin() == globalBuff);
35 assert(b.end() == globalBuff + 8);
36
37 DifferentSentinelSubrange c{ForwardBorrowedRangeDifferentSentinel()};
38 assert(base(c.begin()) == globalBuff);
39 assert(c.end().value == globalBuff + 8);
40
41 return true;
42}
43
44int main(int, char**) {
45 test();
46 static_assert(test());
47
48 return 0;
49}
50

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