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-no-concepts
11 // UNSUPPORTED: libcpp-has-no-incomplete-ranges
12 
13 // class std::ranges::subrange;
14 
15 #include <ranges>
16 
17 #include "types.h"
18 #include <cassert>
19 #include "test_macros.h"
20 #include "test_iterators.h"
21 
22 static_assert( std::is_constructible_v<ForwardSubrange, ForwardBorrowedRange>); // Default case.
23 static_assert(!std::is_constructible_v<ForwardSubrange, ForwardRange>); // Not borrowed.
24 // Iter convertible to sentinel (pointer) type.
25 static_assert( std::is_constructible_v<ConvertibleForwardSubrange, ConvertibleForwardBorrowedRange>);
26 // Where neither iter or sentinel are pointers, but they are different.
27 static_assert( std::is_constructible_v<DifferentSentinelSubrange, ForwardBorrowedRangeDifferentSentinel>);
28 static_assert( std::is_constructible_v<DifferentSentinelWithSizeMemberSubrange, DifferentSentinelWithSizeMember>);
29 
30 constexpr bool test() {
31   ForwardSubrange a{ForwardBorrowedRange()};
32   assert(a.begin().base() == globalBuff);
33   assert(a.end().base() == globalBuff + 8);
34 
35   ConvertibleForwardSubrange b{ConvertibleForwardBorrowedRange()};
36   assert(b.begin() == globalBuff);
37   assert(b.end() == globalBuff + 8);
38 
39   DifferentSentinelSubrange c{ForwardBorrowedRangeDifferentSentinel()};
40   assert(c.begin().base() == globalBuff);
41   assert(c.end().value == globalBuff + 8);
42 
43   return true;
44 }
45 
46 int main(int, char**) {
47   test();
48   static_assert(test());
49 
50   return 0;
51 }
52