[libc++][ranges] implement `std::ranges::set_symmetric_difference`
[libc++][ranges] implement `std::ranges::set_symmetric_difference`
Differential Revision: https://reviews.llvm.org/D129520
NOKEYCHECK=True
GitOrigin-RevId: a5c0638dec838fe4c8189d3c72c251c9030f9605
diff --git a/include/algorithm b/include/algorithm
index 18d8ef3..f616a03 100644
--- a/include/algorithm
+++ b/include/algorithm
@@ -692,6 +692,26 @@
ranges::find_end(R1&& r1, R2&& r2, Pred pred = {},
Proj1 proj1 = {}, Proj2 proj2 = {}); // since C++20
+ template<class I1, class I2, class O>
+ using set_symmetric_difference_result = in_in_out_result<I1, I2, O>; // since C++20
+
+ template<input_iterator I1, sentinel_for<I1> S1, input_iterator I2, sentinel_for<I2> S2,
+ weakly_incrementable O, class Comp = ranges::less,
+ class Proj1 = identity, class Proj2 = identity>
+ requires mergeable<I1, I2, O, Comp, Proj1, Proj2>
+ constexpr set_symmetric_difference_result<I1, I2, O>
+ set_symmetric_difference(I1 first1, S1 last1, I2 first2, S2 last2, O result,
+ Comp comp = {}, Proj1 proj1 = {},
+ Proj2 proj2 = {}); // since C++20
+
+ template<input_range R1, input_range R2, weakly_incrementable O,
+ class Comp = ranges::less, class Proj1 = identity, class Proj2 = identity>
+ requires mergeable<iterator_t<R1>, iterator_t<R2>, O, Comp, Proj1, Proj2>
+ constexpr set_symmetric_difference_result<borrowed_iterator_t<R1>,
+ borrowed_iterator_t<R2>, O>
+ set_symmetric_difference(R1&& r1, R2&& r2, O result, Comp comp = {},
+ Proj1 proj1 = {}, Proj2 proj2 = {}); // since C++20
+
}
constexpr bool // constexpr in C++20
@@ -1472,6 +1492,7 @@
#include <__algorithm/ranges_search_n.h>
#include <__algorithm/ranges_set_difference.h>
#include <__algorithm/ranges_set_intersection.h>
+#include <__algorithm/ranges_set_symmetric_difference.h>
#include <__algorithm/ranges_sort.h>
#include <__algorithm/ranges_sort_heap.h>
#include <__algorithm/ranges_stable_sort.h>