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