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 // template<class R> 14 // concept contiguous_range; 15 16 #include <ranges> 17 18 #include "test_range.h" 19 #include "test_iterators.h" 20 21 namespace ranges = std::ranges; 22 23 template <template <class...> class I> 24 constexpr bool check_range() { 25 constexpr bool result = ranges::contiguous_range<test_range<I> >; 26 static_assert(ranges::contiguous_range<test_range<I> const> == result); 27 static_assert(ranges::contiguous_range<test_non_const_common_range<I> > == result); 28 static_assert(ranges::contiguous_range<test_non_const_range<I> > == result); 29 static_assert(ranges::contiguous_range<test_common_range<I> > == result); 30 static_assert(ranges::contiguous_range<test_common_range<I> const> == result); 31 static_assert(!ranges::contiguous_range<test_non_const_common_range<I> const>); 32 static_assert(!ranges::contiguous_range<test_non_const_range<I> const>); 33 return result; 34 } 35 36 static_assert(!check_range<cpp20_input_iterator>()); 37 static_assert(!check_range<forward_iterator>()); 38 static_assert(!check_range<bidirectional_iterator>()); 39 static_assert(!check_range<random_access_iterator>()); 40 static_assert(check_range<contiguous_iterator>()); 41 42 struct ContiguousWhenNonConst { 43 const int *begin() const; 44 const int *end() const; 45 int *begin(); 46 int *end(); 47 int *data() const; 48 }; 49 static_assert( std::ranges::contiguous_range<ContiguousWhenNonConst>); 50 static_assert( std::ranges::random_access_range<const ContiguousWhenNonConst>); 51 static_assert(!std::ranges::contiguous_range<const ContiguousWhenNonConst>); 52 53 struct ContiguousWhenConst { 54 const int *begin() const; 55 const int *end() const; 56 int *begin(); 57 int *end(); 58 const int *data() const; 59 }; 60 static_assert( std::ranges::contiguous_range<const ContiguousWhenConst>); 61 static_assert( std::ranges::random_access_range<ContiguousWhenConst>); 62 static_assert(!std::ranges::contiguous_range<ContiguousWhenConst>); 63 64 struct DataFunctionWrongReturnType { 65 const int *begin() const; 66 const int *end() const; 67 const char *data() const; 68 }; 69 static_assert( std::ranges::random_access_range<DataFunctionWrongReturnType>); 70 static_assert(!std::ranges::contiguous_range<DataFunctionWrongReturnType>); 71 72 struct WrongObjectness { 73 const int *begin() const; 74 const int *end() const; 75 void *data() const; 76 }; 77 static_assert(std::ranges::contiguous_range<WrongObjectness>); 78 79 // Test ADL-proofing. 80 struct Incomplete; 81 template<class T> struct Holder { T t; }; 82 83 static_assert(!std::ranges::contiguous_range<Holder<Incomplete>*>); 84 static_assert(!std::ranges::contiguous_range<Holder<Incomplete>*&>); 85 static_assert(!std::ranges::contiguous_range<Holder<Incomplete>*&&>); 86 static_assert(!std::ranges::contiguous_range<Holder<Incomplete>* const>); 87 static_assert(!std::ranges::contiguous_range<Holder<Incomplete>* const&>); 88 static_assert(!std::ranges::contiguous_range<Holder<Incomplete>* const&&>); 89 90 static_assert( std::ranges::contiguous_range<Holder<Incomplete>*[10]>); 91 static_assert( std::ranges::contiguous_range<Holder<Incomplete>*(&)[10]>); 92 static_assert( std::ranges::contiguous_range<Holder<Incomplete>*(&&)[10]>); 93 static_assert( std::ranges::contiguous_range<Holder<Incomplete>* const[10]>); 94 static_assert( std::ranges::contiguous_range<Holder<Incomplete>* const(&)[10]>); 95 static_assert( std::ranges::contiguous_range<Holder<Incomplete>* const(&&)[10]>); 96