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// template<class R>
12// concept contiguous_range;
13
14#include <ranges>
15
16#include "test_range.h"
17#include "test_iterators.h"
18
19namespace ranges = std::ranges;
20
21template <template <class...> class I>
22constexpr bool check_range() {
23 constexpr bool result = ranges::contiguous_range<test_range<I> >;
24 static_assert(ranges::contiguous_range<test_range<I> const> == result);
25 static_assert(ranges::contiguous_range<test_non_const_common_range<I> > == result);
26 static_assert(ranges::contiguous_range<test_non_const_range<I> > == result);
27 static_assert(ranges::contiguous_range<test_common_range<I> > == result);
28 static_assert(ranges::contiguous_range<test_common_range<I> const> == result);
29 static_assert(!ranges::contiguous_range<test_non_const_common_range<I> const>);
30 static_assert(!ranges::contiguous_range<test_non_const_range<I> const>);
31 return result;
32}
33
34static_assert(!check_range<cpp20_input_iterator>());
35static_assert(!check_range<forward_iterator>());
36static_assert(!check_range<bidirectional_iterator>());
37static_assert(!check_range<random_access_iterator>());
38static_assert(check_range<contiguous_iterator>());
39
40struct ContiguousWhenNonConst {
41 const int *begin() const;
42 const int *end() const;
43 int *begin();
44 int *end();
45 int *data() const;
46};
47static_assert( std::ranges::contiguous_range<ContiguousWhenNonConst>);
48static_assert( std::ranges::random_access_range<const ContiguousWhenNonConst>);
49static_assert(!std::ranges::contiguous_range<const ContiguousWhenNonConst>);
50
51struct ContiguousWhenConst {
52 const int *begin() const;
53 const int *end() const;
54 int *begin();
55 int *end();
56 const int *data() const;
57};
58static_assert( std::ranges::contiguous_range<const ContiguousWhenConst>);
59static_assert( std::ranges::random_access_range<ContiguousWhenConst>);
60static_assert(!std::ranges::contiguous_range<ContiguousWhenConst>);
61
62struct DataFunctionWrongReturnType {
63 const int *begin() const;
64 const int *end() const;
65 const char *data() const;
66};
67static_assert( std::ranges::random_access_range<DataFunctionWrongReturnType>);
68static_assert(!std::ranges::contiguous_range<DataFunctionWrongReturnType>);
69
70struct WrongObjectness {
71 const int *begin() const;
72 const int *end() const;
73 void *data() const;
74};
75static_assert(std::ranges::contiguous_range<WrongObjectness>);
76
77// Test ADL-proofing.
78struct Incomplete;
79template<class T> struct Holder { T t; };
80
81static_assert(!std::ranges::contiguous_range<Holder<Incomplete>*>);
82static_assert(!std::ranges::contiguous_range<Holder<Incomplete>*&>);
83static_assert(!std::ranges::contiguous_range<Holder<Incomplete>*&&>);
84static_assert(!std::ranges::contiguous_range<Holder<Incomplete>* const>);
85static_assert(!std::ranges::contiguous_range<Holder<Incomplete>* const&>);
86static_assert(!std::ranges::contiguous_range<Holder<Incomplete>* const&&>);
87
88static_assert( std::ranges::contiguous_range<Holder<Incomplete>*[10]>);
89static_assert( std::ranges::contiguous_range<Holder<Incomplete>*(&)[10]>);
90static_assert( std::ranges::contiguous_range<Holder<Incomplete>*(&&)[10]>);
91static_assert( std::ranges::contiguous_range<Holder<Incomplete>* const[10]>);
92static_assert( std::ranges::contiguous_range<Holder<Incomplete>* const(&)[10]>);
93static_assert( std::ranges::contiguous_range<Holder<Incomplete>* const(&&)[10]>);
94

source code of libcxx/test/std/ranges/range.req/range.refinements/contiguous_range.compile.pass.cpp