| //===----------------------------------------------------------------------===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| |
| // UNSUPPORTED: c++03, c++11, c++14, c++17 |
| // UNSUPPORTED: libcpp-no-concepts |
| |
| // template<input_iterator I, class S> |
| // struct iterator_traits<common_iterator<I, S>>; |
| |
| #include <iterator> |
| |
| #include "test_macros.h" |
| #include "types.h" |
| |
| void test() { |
| { |
| using Iter = simple_iterator<int*>; |
| using CommonIter = std::common_iterator<Iter, sentinel_type<int*>>; |
| using IterTraits = std::iterator_traits<CommonIter>; |
| |
| static_assert(std::same_as<IterTraits::iterator_concept, std::input_iterator_tag>); |
| static_assert(std::same_as<IterTraits::iterator_category, std::input_iterator_tag>); |
| static_assert(std::same_as<IterTraits::value_type, int>); |
| static_assert(std::same_as<IterTraits::difference_type, std::ptrdiff_t>); |
| static_assert(std::same_as<IterTraits::pointer, int*>); |
| static_assert(std::same_as<IterTraits::reference, int&>); |
| } |
| { |
| using Iter = value_iterator<int*>; |
| using CommonIter = std::common_iterator<Iter, sentinel_type<int*>>; |
| using IterTraits = std::iterator_traits<CommonIter>; |
| |
| static_assert(std::same_as<IterTraits::iterator_concept, std::input_iterator_tag>); |
| static_assert(std::same_as<IterTraits::iterator_category, std::input_iterator_tag>); |
| static_assert(std::same_as<IterTraits::value_type, int>); |
| static_assert(std::same_as<IterTraits::difference_type, std::ptrdiff_t>); |
| // Note: IterTraits::pointer == __proxy. |
| static_assert(!std::same_as<IterTraits::pointer, int*>); |
| static_assert(std::same_as<IterTraits::reference, int>); |
| } |
| { |
| using Iter = non_const_deref_iterator<int*>; |
| using CommonIter = std::common_iterator<Iter, sentinel_type<int*>>; |
| using IterTraits = std::iterator_traits<CommonIter>; |
| |
| static_assert(std::same_as<IterTraits::iterator_concept, std::input_iterator_tag>); |
| static_assert(std::same_as<IterTraits::iterator_category, std::input_iterator_tag>); |
| static_assert(std::same_as<IterTraits::value_type, int>); |
| static_assert(std::same_as<IterTraits::difference_type, std::ptrdiff_t>); |
| static_assert(std::same_as<IterTraits::pointer, void>); |
| static_assert(std::same_as<IterTraits::reference, int&>); |
| } |
| { |
| using Iter = cpp17_input_iterator<int*>; |
| using CommonIter = std::common_iterator<Iter, sentinel_type<int*>>; |
| using IterTraits = std::iterator_traits<CommonIter>; |
| |
| static_assert(std::same_as<IterTraits::iterator_concept, std::input_iterator_tag>); |
| static_assert(std::same_as<IterTraits::iterator_category, std::input_iterator_tag>); |
| static_assert(std::same_as<IterTraits::value_type, int>); |
| static_assert(std::same_as<IterTraits::difference_type, std::ptrdiff_t>); |
| static_assert(std::same_as<IterTraits::pointer, const Iter&>); |
| static_assert(std::same_as<IterTraits::reference, int&>); |
| } |
| { |
| using Iter = forward_iterator<int*>; |
| using CommonIter = std::common_iterator<Iter, sentinel_type<int*>>; |
| using IterTraits = std::iterator_traits<CommonIter>; |
| |
| static_assert(std::same_as<IterTraits::iterator_concept, std::forward_iterator_tag>); |
| static_assert(std::same_as<IterTraits::iterator_category, std::forward_iterator_tag>); |
| static_assert(std::same_as<IterTraits::value_type, int>); |
| static_assert(std::same_as<IterTraits::difference_type, std::ptrdiff_t>); |
| static_assert(std::same_as<IterTraits::pointer, const Iter&>); |
| static_assert(std::same_as<IterTraits::reference, int&>); |
| } |
| { |
| using Iter = random_access_iterator<int*>; |
| using CommonIter = std::common_iterator<Iter, sentinel_type<int*>>; |
| using IterTraits = std::iterator_traits<CommonIter>; |
| |
| static_assert(std::same_as<IterTraits::iterator_concept, std::forward_iterator_tag>); |
| static_assert(std::same_as<IterTraits::iterator_category, std::forward_iterator_tag>); |
| static_assert(std::same_as<IterTraits::value_type, int>); |
| static_assert(std::same_as<IterTraits::difference_type, std::ptrdiff_t>); |
| static_assert(std::same_as<IterTraits::pointer, const Iter&>); |
| static_assert(std::same_as<IterTraits::reference, int&>); |
| } |
| |
| // Testing iterator conformance. |
| { |
| static_assert(std::input_iterator<std::common_iterator<cpp17_input_iterator<int*>, sentinel_type<int*>>>); |
| static_assert(std::forward_iterator<std::common_iterator<forward_iterator<int*>, sentinel_type<int*>>>); |
| static_assert(std::forward_iterator<std::common_iterator<random_access_iterator<int*>, sentinel_type<int*>>>); |
| static_assert(std::forward_iterator<std::common_iterator<contiguous_iterator<int*>, sentinel_type<int*>>>); |
| // Even these are only forward. |
| static_assert(!std::bidirectional_iterator<std::common_iterator<random_access_iterator<int*>, sentinel_type<int*>>>); |
| static_assert(!std::bidirectional_iterator<std::common_iterator<contiguous_iterator<int*>, sentinel_type<int*>>>); |
| |
| using Iter = std::common_iterator<forward_iterator<int*>, sentinel_type<int*>>; |
| static_assert(std::indirectly_writable<Iter, int>); |
| static_assert(std::indirectly_swappable<Iter, Iter>); |
| } |
| } |