| //===----------------------------------------------------------------------===// |
| // |
| // 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 |
| // |
| //===----------------------------------------------------------------------===// |
| |
| // <algorithm> |
| |
| // template <class RandomAccessIterator> |
| // void |
| // random_shuffle(RandomAccessIterator first, RandomAccessIterator last); |
| // |
| // template <class RandomAccessIterator, class RandomNumberGenerator> |
| // void |
| // random_shuffle(RandomAccessIterator first, RandomAccessIterator last, |
| // RandomNumberGenerator& rand); |
| |
| // |
| // In C++17, random_shuffle has been removed. |
| // However, for backwards compatibility, if _LIBCPP_ENABLE_CXX17_REMOVED_RANDOM_SHUFFLE |
| // is defined before including <algorithm>, then random_shuffle will be restored. |
| |
| // ADDITIONAL_COMPILE_FLAGS: -D_LIBCPP_ENABLE_CXX17_REMOVED_RANDOM_SHUFFLE |
| // ADDITIONAL_COMPILE_FLAGS: -D_LIBCPP_DISABLE_DEPRECATION_WARNINGS |
| |
| #include <algorithm> |
| #include <vector> |
| |
| #include "test_macros.h" |
| |
| struct gen |
| { |
| std::ptrdiff_t operator()(std::ptrdiff_t n) |
| { |
| return n-1; |
| } |
| }; |
| |
| |
| int main(int, char**) |
| { |
| std::vector<int> v; |
| std::random_shuffle(v.begin(), v.end()); |
| gen r; |
| std::random_shuffle(v.begin(), v.end(), r); |
| |
| return 0; |
| } |