Differential D127418 Diff 439482 libcxx/test/libcxx/iterators/bounded_iter/pointer_traits.pass.cpp

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libcxx/test/libcxx/iterators/bounded_iter/pointer_traits.pass.cpp

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				//===----------------------------------------------------------------------===//
				//
				// 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
				//
				//===----------------------------------------------------------------------===//

				// template <class _Iterator>
				// struct __bounded_iter;
				//
				// std::pointer_traits specialization

				#include <cassert>
				#include <cstddef>
				#include <iterator>
				#include <type_traits>

				#include "test_iterators.h"
				#include "test_macros.h"

				template <class Iter>
				TEST_CONSTEXPR_CXX14 bool tests() {
				using BoundedIter = std::__bounded_iter<Iter>;
				using PointerTraits = std::pointer_traits<BoundedIter>;
				using BasePointerTraits = std::pointer_traits<Iter>;
				static_assert(std::is_same<typename PointerTraits::pointer, BoundedIter>::value, "");
				static_assert(std::is_same<typename PointerTraits::element_type, typename BasePointerTraits::element_type>::value, "");
				static_assert(std::is_same<typename PointerTraits::difference_type, typename BasePointerTraits::difference_type>::value, "");

				{
				int array[] = {0, 1, 2, 3, 4};
				int* b = array + 0;
				int* e = array + 5;
				std::__bounded_iter<Iter> const iter1 = std::__make_bounded_iter(Iter(b), Iter(b), Iter(e));
				std::__bounded_iter<Iter> const iter2 = std::__make_bounded_iter(Iter(e), Iter(b), Iter(e));
				assert(std::to_address(iter1) == b); // in-bounds iterator
				assert(std::to_address(iter2) == e); // out-of-bounds iterator
				}

				return true;
				}

				int main(int, char**) {
				tests<int*>();
				#if TEST_STD_VER > 11
				static_assert(tests<int*>(), "");
				#endif

				#if TEST_STD_VER > 17
				tests<contiguous_iterator<int*> >();
				static_assert(tests<contiguous_iterator<int*> >(), "");
				#endif

				return 0;
				}