[libc++][ranges] Implement `ranges::sample`.
Differential Revision: https://reviews.llvm.org/D130865
diff --git a/libcxx/include/algorithm b/libcxx/include/algorithm
index 0a40778..15ba340 100644
--- a/libcxx/include/algorithm
+++ b/libcxx/include/algorithm
@@ -758,6 +758,18 @@
constexpr ranges::rotate_copy_result<borrowed_iterator_t<R>, O>
ranges::rotate_copy(R&& r, iterator_t<R> middle, O result); // since C++20
+ template<input_iterator I, sentinel_for<I> S, weakly_incrementable O, class Gen>
+ requires (forward_iterator<I> || random_access_iterator<O>) &&
+ indirectly_copyable<I, O> &&
+ uniform_random_bit_generator<remove_reference_t<Gen>>
+ O sample(I first, S last, O out, iter_difference_t<I> n, Gen&& g); // Since C++20
+
+ template<input_range R, weakly_incrementable O, class Gen>
+ requires (forward_range<R> || random_access_iterator<O>) &&
+ indirectly_copyable<iterator_t<R>, O> &&
+ uniform_random_bit_generator<remove_reference_t<Gen>>
+ O sample(R&& r, O out, range_difference_t<R> n, Gen&& g); // Since C++20
+
template<random_access_iterator I, sentinel_for<I> S, class Gen>
requires permutable<I> &&
uniform_random_bit_generator<remove_reference_t<Gen>>
@@ -1773,6 +1785,7 @@
#include <__algorithm/ranges_reverse.h>
#include <__algorithm/ranges_reverse_copy.h>
#include <__algorithm/ranges_rotate_copy.h>
+#include <__algorithm/ranges_sample.h>
#include <__algorithm/ranges_search.h>
#include <__algorithm/ranges_search_n.h>
#include <__algorithm/ranges_set_difference.h>
