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
20// convertible-to-non-slicing cases:
21// 1. Not convertible (fail)
22// 2. Only one is a pointer (succeed)
23// 3. Both are not pointers (succeed)
24// 4. Pointer elements are different types (fail)
25// 5. Pointer elements are same type (succeed)
26
27// !StoreSize ctor.
28static_assert( std::is_constructible_v<ForwardSubrange, ForwardIter, ForwardIter>); // Default case.
29static_assert(!std::is_constructible_v<ForwardSubrange, Empty, ForwardIter>); // 1.
30static_assert( std::is_constructible_v<ConvertibleForwardSubrange, ConvertibleForwardIter, int*>); // 2.
31static_assert( std::is_constructible_v<ForwardSubrange, ForwardIter, ForwardIter>); // 3. (Same as default case.)
32// 4. and 5. must be sized.
33
34constexpr bool test() {
35 ForwardSubrange a(ForwardIter(globalBuff), ForwardIter(globalBuff + 8));
36 assert(base(a.begin()) == globalBuff);
37 assert(base(a.end()) == globalBuff + 8);
38
39 ConvertibleForwardSubrange b(ConvertibleForwardIter(globalBuff), globalBuff + 8);
40 assert(b.begin() == globalBuff);
41 assert(b.end() == globalBuff + 8);
42
43 return true;
44}
45
46int main(int, char**) {
47 test();
48 static_assert(test());
49
50 return 0;
51}
52

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