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-has-no-incomplete-ranges 11 12 // template<class R> 13 // concept contiguous_range; 14 15 #include <ranges> 16 17 #include "test_range.h" 18 #include "test_iterators.h" 19 20 namespace ranges = std::ranges; 21 22 template <template <class...> class I> 23 constexpr bool check_range() { 24 constexpr bool result = ranges::contiguous_range<test_range<I> >; 25 static_assert(ranges::contiguous_range<test_range<I> const> == result); 26 static_assert(ranges::contiguous_range<test_non_const_common_range<I> > == result); 27 static_assert(ranges::contiguous_range<test_non_const_range<I> > == result); 28 static_assert(ranges::contiguous_range<test_common_range<I> > == result); 29 static_assert(ranges::contiguous_range<test_common_range<I> const> == result); 30 static_assert(!ranges::contiguous_range<test_non_const_common_range<I> const>); 31 static_assert(!ranges::contiguous_range<test_non_const_range<I> const>); 32 return result; 33 } 34 35 static_assert(!check_range<cpp20_input_iterator>()); 36 static_assert(!check_range<forward_iterator>()); 37 static_assert(!check_range<bidirectional_iterator>()); 38 static_assert(!check_range<random_access_iterator>()); 39 static_assert(check_range<contiguous_iterator>()); 40 41 struct ContiguousWhenNonConst { 42 const int *begin() const; 43 const int *end() const; 44 int *begin(); 45 int *end(); 46 int *data() const; 47 }; 48 static_assert( std::ranges::contiguous_range<ContiguousWhenNonConst>); 49 static_assert( std::ranges::random_access_range<const ContiguousWhenNonConst>); 50 static_assert(!std::ranges::contiguous_range<const ContiguousWhenNonConst>); 51 52 struct ContiguousWhenConst { 53 const int *begin() const; 54 const int *end() const; 55 int *begin(); 56 int *end(); 57 const int *data() const; 58 }; 59 static_assert( std::ranges::contiguous_range<const ContiguousWhenConst>); 60 static_assert( std::ranges::random_access_range<ContiguousWhenConst>); 61 static_assert(!std::ranges::contiguous_range<ContiguousWhenConst>); 62 63 struct DataFunctionWrongReturnType { 64 const int *begin() const; 65 const int *end() const; 66 const char *data() const; 67 }; 68 static_assert( std::ranges::random_access_range<DataFunctionWrongReturnType>); 69 static_assert(!std::ranges::contiguous_range<DataFunctionWrongReturnType>); 70 71 struct WrongObjectness { 72 const int *begin() const; 73 const int *end() const; 74 void *data() const; 75 }; 76 static_assert(std::ranges::contiguous_range<WrongObjectness>); 77 78 // Test ADL-proofing. 79 struct Incomplete; 80 template<class T> struct Holder { T t; }; 81 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>*&&>); 85 static_assert(!std::ranges::contiguous_range<Holder<Incomplete>* const>); 86 static_assert(!std::ranges::contiguous_range<Holder<Incomplete>* const&>); 87 static_assert(!std::ranges::contiguous_range<Holder<Incomplete>* const&&>); 88 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>*(&&)[10]>); 92 static_assert( std::ranges::contiguous_range<Holder<Incomplete>* const[10]>); 93 static_assert( std::ranges::contiguous_range<Holder<Incomplete>* const(&)[10]>); 94 static_assert( std::ranges::contiguous_range<Holder<Incomplete>* const(&&)[10]>); 95