| //===----------------------------------------------------------------------===// |
| // |
| // 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 |
| // |
| //===----------------------------------------------------------------------===// |
| |
| // <vector> |
| |
| // reverse_iterator rbegin(); |
| // reverse_iterator rend(); |
| // const_reverse_iterator rbegin() const; |
| // const_reverse_iterator rend() const; |
| // const_reverse_iterator crbegin() const; |
| // const_reverse_iterator crend() const; |
| |
| #include <vector> |
| #include <cassert> |
| #include <iterator> |
| |
| #include "min_allocator.h" |
| |
| template <class Vector> |
| TEST_CONSTEXPR_CXX20 void check_vector_reverse_iterators() { |
| { |
| Vector vec; |
| assert(vec.rbegin() == vec.rend()); |
| assert(vec.crbegin() == vec.crend()); |
| } |
| { |
| const int n = 10; |
| Vector vec; |
| const Vector& cvec = vec; |
| vec.reserve(n); |
| for (int i = 0; i < n; ++i) |
| vec.push_back(i); |
| { |
| int iterations = 0; |
| |
| for (typename Vector::const_reverse_iterator it = vec.crbegin(); it != vec.crend(); ++it) { |
| assert(*it == (n - iterations - 1)); |
| ++iterations; |
| } |
| assert(iterations == n); |
| } |
| { |
| assert(cvec.rbegin() == vec.crbegin()); |
| assert(cvec.rend() == vec.crend()); |
| } |
| { |
| int iterations = 0; |
| |
| for (typename Vector::reverse_iterator it = vec.rbegin(); it != vec.rend(); ++it) { |
| assert(*it == (n - iterations - 1)); |
| *it = 40; |
| assert(*it == 40); |
| ++iterations; |
| } |
| assert(iterations == n); |
| } |
| |
| assert(std::distance(vec.rbegin(), vec.rend()) == n); |
| assert(std::distance(cvec.rbegin(), cvec.rend()) == n); |
| assert(std::distance(vec.crbegin(), vec.crend()) == n); |
| assert(std::distance(cvec.crbegin(), cvec.crend()) == n); |
| } |
| } |
| |
| TEST_CONSTEXPR_CXX20 bool test() { |
| check_vector_reverse_iterators<std::vector<int> >(); |
| #if TEST_STD_VER >= 11 |
| check_vector_reverse_iterators<std::vector<int, min_allocator<int> > >(); |
| #endif |
| |
| return true; |
| } |
| |
| int main(int, char**) { |
| test(); |
| #if TEST_STD_VER > 17 |
| static_assert(test()); |
| #endif |
| |
| return 0; |
| } |