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 19 namespace ranges = std::ranges; 20 21 template <template <class...> class I> check_range()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 34 static_assert(!check_range<cpp20_input_iterator>()); 35 static_assert(!check_range<forward_iterator>()); 36 static_assert(!check_range<bidirectional_iterator>()); 37 static_assert(!check_range<random_access_iterator>()); 38 static_assert(check_range<contiguous_iterator>()); 39 40 struct ContiguousWhenNonConst { 41 const int *begin() const; 42 const int *end() const; 43 int *begin(); 44 int *end(); 45 int *data() const; 46 }; 47 static_assert( std::ranges::contiguous_range<ContiguousWhenNonConst>); 48 static_assert( std::ranges::random_access_range<const ContiguousWhenNonConst>); 49 static_assert(!std::ranges::contiguous_range<const ContiguousWhenNonConst>); 50 51 struct ContiguousWhenConst { 52 const int *begin() const; 53 const int *end() const; 54 int *begin(); 55 int *end(); 56 const int *data() const; 57 }; 58 static_assert( std::ranges::contiguous_range<const ContiguousWhenConst>); 59 static_assert( std::ranges::random_access_range<ContiguousWhenConst>); 60 static_assert(!std::ranges::contiguous_range<ContiguousWhenConst>); 61 62 struct DataFunctionWrongReturnType { 63 const int *begin() const; 64 const int *end() const; 65 const char *data() const; 66 }; 67 static_assert( std::ranges::random_access_range<DataFunctionWrongReturnType>); 68 static_assert(!std::ranges::contiguous_range<DataFunctionWrongReturnType>); 69 70 struct WrongObjectness { 71 const int *begin() const; 72 const int *end() const; 73 void *data() const; 74 }; 75 static_assert(std::ranges::contiguous_range<WrongObjectness>); 76 77 // Test ADL-proofing. 78 struct Incomplete; 79 template<class T> struct Holder { T t; }; 80 81 static_assert(!std::ranges::contiguous_range<Holder<Incomplete>*>); 82 static_assert(!std::ranges::contiguous_range<Holder<Incomplete>*&>); 83 static_assert(!std::ranges::contiguous_range<Holder<Incomplete>*&&>); 84 static_assert(!std::ranges::contiguous_range<Holder<Incomplete>* const>); 85 static_assert(!std::ranges::contiguous_range<Holder<Incomplete>* const&>); 86 static_assert(!std::ranges::contiguous_range<Holder<Incomplete>* const&&>); 87 88 static_assert( std::ranges::contiguous_range<Holder<Incomplete>*[10]>); 89 static_assert( std::ranges::contiguous_range<Holder<Incomplete>*(&)[10]>); 90 static_assert( std::ranges::contiguous_range<Holder<Incomplete>*(&&)[10]>); 91 static_assert( std::ranges::contiguous_range<Holder<Incomplete>* const[10]>); 92 static_assert( std::ranges::contiguous_range<Holder<Incomplete>* const(&)[10]>); 93 static_assert( std::ranges::contiguous_range<Holder<Incomplete>* const(&&)[10]>); 94