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 "types.h"
17 #include <cassert>
18 #include "test_macros.h"
19 #include "test_iterators.h"
20 
21 static_assert( std::is_constructible_v<ForwardSubrange, ForwardBorrowedRange>); // Default case.
22 static_assert(!std::is_constructible_v<ForwardSubrange, ForwardRange>); // Not borrowed.
23 // Iter convertible to sentinel (pointer) type.
24 static_assert( std::is_constructible_v<ConvertibleForwardSubrange, ConvertibleForwardBorrowedRange>);
25 // Where neither iter or sentinel are pointers, but they are different.
26 static_assert( std::is_constructible_v<DifferentSentinelSubrange, ForwardBorrowedRangeDifferentSentinel>);
27 static_assert( std::is_constructible_v<DifferentSentinelWithSizeMemberSubrange, DifferentSentinelWithSizeMember>);
28 
29 constexpr bool test() {
30   ForwardSubrange a{ForwardBorrowedRange()};
31   assert(base(a.begin()) == globalBuff);
32   assert(base(a.end()) == globalBuff + 8);
33 
34   ConvertibleForwardSubrange b{ConvertibleForwardBorrowedRange()};
35   assert(b.begin() == globalBuff);
36   assert(b.end() == globalBuff + 8);
37 
38   DifferentSentinelSubrange c{ForwardBorrowedRangeDifferentSentinel()};
39   assert(base(c.begin()) == globalBuff);
40   assert(c.end().value == globalBuff + 8);
41 
42   return true;
43 }
44 
45 int main(int, char**) {
46   test();
47   static_assert(test());
48 
49   return 0;
50 }
51