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, class T> 12 // concept output_range; 13 14 #include <ranges> 15 16 #include <iterator> 17 #include "test_iterators.h" 18 #include "test_range.h" 19 20 struct T { }; 21 22 // Satisfied when it's a range and has the right iterator 23 struct GoodRange { 24 cpp17_output_iterator<T*> begin(); 25 sentinel end(); 26 }; 27 static_assert(std::ranges::range<GoodRange>); 28 static_assert(std::output_iterator<std::ranges::iterator_t<GoodRange>, T>); 29 static_assert(std::ranges::output_range<GoodRange, T>); 30 31 // Not satisfied when it's not a range 32 struct NotRange { 33 cpp17_output_iterator<T*> begin(); 34 }; 35 static_assert(!std::ranges::range<NotRange>); 36 static_assert( std::output_iterator<std::ranges::iterator_t<NotRange>, T>); 37 static_assert(!std::ranges::output_range<NotRange, T>); 38 39 // Not satisfied when the iterator is not an output_iterator 40 struct RangeWithBadIterator { 41 cpp17_input_iterator<T const*> begin(); 42 sentinel end(); 43 }; 44 static_assert( std::ranges::range<RangeWithBadIterator>); 45 static_assert(!std::output_iterator<std::ranges::iterator_t<RangeWithBadIterator>, T>); 46 static_assert(!std::ranges::output_range<RangeWithBadIterator, T>); 47 48 // Test ADL-proofing. 49 struct Incomplete; 50 template<class T> struct Holder { T t; }; 51 52 static_assert(!std::ranges::output_range<Holder<Incomplete>*, Holder<Incomplete>*>); 53 static_assert(!std::ranges::output_range<Holder<Incomplete>*&, Holder<Incomplete>*>); 54 static_assert(!std::ranges::output_range<Holder<Incomplete>*&&, Holder<Incomplete>*>); 55 static_assert(!std::ranges::output_range<Holder<Incomplete>* const, Holder<Incomplete>*>); 56 static_assert(!std::ranges::output_range<Holder<Incomplete>* const&, Holder<Incomplete>*>); 57 static_assert(!std::ranges::output_range<Holder<Incomplete>* const&&, Holder<Incomplete>*>); 58 59 static_assert( std::ranges::output_range<Holder<Incomplete>*[10], Holder<Incomplete>*>); 60 static_assert( std::ranges::output_range<Holder<Incomplete>*(&)[10], Holder<Incomplete>*>); 61 static_assert( std::ranges::output_range<Holder<Incomplete>*(&&)[10], Holder<Incomplete>*>); 62 static_assert(!std::ranges::output_range<Holder<Incomplete>* const[10], Holder<Incomplete>*>); 63 static_assert(!std::ranges::output_range<Holder<Incomplete>* const(&)[10], Holder<Incomplete>*>); 64 static_assert(!std::ranges::output_range<Holder<Incomplete>* const(&&)[10], Holder<Incomplete>*>); 65