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 random_access_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> check_range()23constexpr bool check_range() { 24 constexpr bool result = ranges::random_access_range<test_range<I> >; 25 static_assert(ranges::random_access_range<test_range<I> const> == result); 26 static_assert(ranges::random_access_range<test_non_const_common_range<I> > == result); 27 static_assert(ranges::random_access_range<test_non_const_range<I> > == result); 28 static_assert(ranges::random_access_range<test_common_range<I> > == result); 29 static_assert(ranges::random_access_range<test_common_range<I> const> == result); 30 static_assert(!ranges::random_access_range<test_non_const_common_range<I> const>); 31 static_assert(!ranges::random_access_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 // Test ADL-proofing. 42 struct Incomplete; 43 template<class T> struct Holder { T t; }; 44 45 static_assert(!std::ranges::random_access_range<Holder<Incomplete>*>); 46 static_assert(!std::ranges::random_access_range<Holder<Incomplete>*&>); 47 static_assert(!std::ranges::random_access_range<Holder<Incomplete>*&&>); 48 static_assert(!std::ranges::random_access_range<Holder<Incomplete>* const>); 49 static_assert(!std::ranges::random_access_range<Holder<Incomplete>* const&>); 50 static_assert(!std::ranges::random_access_range<Holder<Incomplete>* const&&>); 51 52 static_assert( std::ranges::random_access_range<Holder<Incomplete>*[10]>); 53 static_assert( std::ranges::random_access_range<Holder<Incomplete>*(&)[10]>); 54 static_assert( std::ranges::random_access_range<Holder<Incomplete>*(&&)[10]>); 55 static_assert( std::ranges::random_access_range<Holder<Incomplete>* const[10]>); 56 static_assert( std::ranges::random_access_range<Holder<Incomplete>* const(&)[10]>); 57 static_assert( std::ranges::random_access_range<Holder<Incomplete>* const(&&)[10]>); 58