| //===----------------------------------------------------------------------===// |
| // |
| // 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 |
| // |
| //===----------------------------------------------------------------------===// |
| |
| // <iterator> |
| |
| // reverse_iterator |
| |
| // template <RandomAccessIterator Iterator> |
| // reverse_iterator<Iter> operator+(Iter::difference_type n, const reverse_iterator<Iter>& x); // constexpr in C++17 |
| |
| #include <iterator> |
| #include <cassert> |
| |
| #include "test_macros.h" |
| #include "test_iterators.h" |
| |
| template <class It> |
| TEST_CONSTEXPR_CXX17 void test(It i, typename std::iterator_traits<It>::difference_type n, It x) { |
| const std::reverse_iterator<It> r(i); |
| std::reverse_iterator<It> rr = n + r; |
| assert(rr.base() == x); |
| } |
| |
| TEST_CONSTEXPR_CXX17 bool tests() { |
| const char* s = "1234567890"; |
| test(random_access_iterator<const char*>(s+5), 5, random_access_iterator<const char*>(s)); |
| test(s+5, 5, s); |
| return true; |
| } |
| |
| int main(int, char**) { |
| tests(); |
| #if TEST_STD_VER > 14 |
| static_assert(tests(), ""); |
| #endif |
| return 0; |
| } |