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
27static_assert( std::is_constructible_v<SizedSentinelForwardSubrange, ConditionallyConvertibleIter, ConditionallyConvertibleIter, ConditionallyConvertibleIter::udifference_type>); // Default case.
28static_assert(!std::is_constructible_v<SizedSentinelForwardSubrange, Empty, ConditionallyConvertibleIter, ConditionallyConvertibleIter::udifference_type>); // 1.
29static_assert( std::is_constructible_v<ConvertibleSizedSentinelForwardSubrange, ConvertibleSizedSentinelForwardIter, int*, ConvertibleSizedSentinelForwardIter::udifference_type>); // 2.
30static_assert( std::is_constructible_v<SizedSentinelForwardSubrange, ConditionallyConvertibleIter, ConditionallyConvertibleIter, ConditionallyConvertibleIter::udifference_type>); // 3. (Same as default case.)
31static_assert(!std::is_constructible_v<SizedIntPtrSubrange, long*, int*, std::size_t>); // 4.
32static_assert( std::is_constructible_v<SizedIntPtrSubrange, int*, int*, std::size_t>); // 5.
33
34constexpr bool test() {
35 SizedSentinelForwardSubrange a(ConditionallyConvertibleIter(globalBuff), ConditionallyConvertibleIter(globalBuff + 8), 8);
36 assert(a.begin().base() == globalBuff);
37 assert(a.end().base() == globalBuff + 8);
38 assert(a.size() == 8);
39
40 ConvertibleSizedSentinelForwardSubrange b(ConvertibleSizedSentinelForwardIter(globalBuff), ConvertibleSizedSentinelForwardIter(globalBuff + 8), 8);
41 assert(b.begin() == globalBuff);
42 assert(b.end() == globalBuff + 8);
43 assert(b.size() == 8);
44
45 SizedIntPtrSubrange c(globalBuff, globalBuff + 8, 8);
46 assert(c.begin() == globalBuff);
47 assert(c.end() == globalBuff + 8);
48 assert(c.size() == 8);
49
50 return true;
51}
52
53int main(int, char**) {
54 test();
55 static_assert(test());
56
57 return 0;
58}
59

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