| //===----------------------------------------------------------------------===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is dual licensed under the MIT and the University of Illinois Open |
| // Source Licenses. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| // <memory> |
| |
| // 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. |
| |
| // MODULES_DEFINES: _LIBCPP_ENABLE_CXX17_REMOVED_RANDOM_SHUFFLE |
| #define _LIBCPP_ENABLE_CXX17_REMOVED_RANDOM_SHUFFLE |
| |
| #include <algorithm> |
| #include <vector> |
| |
| struct gen |
| { |
| std::ptrdiff_t operator()(std::ptrdiff_t n) |
| { |
| return n-1; |
| } |
| }; |
| |
| |
| int main() |
| { |
| std::vector<int> v; |
| std::random_shuffle(v.begin(), v.end()); |
| gen r; |
| std::random_shuffle(v.begin(), v.end(), r); |
| } |