1 files changed, 28 insertions, 0 deletions
diff --git a/absl/container/flat_hash_set.h b/absl/container/flat_hash_set.h
index e284a7df..a3e36e05 100644
--- a/absl/container/flat_hash_set.h
+++ b/absl/container/flat_hash_set.h
@@ -44,6 +44,7 @@
 #include "absl/container/internal/container_memory.h"
 #include "absl/container/internal/raw_hash_set.h"  // IWYU pragma: export
 #include "absl/memory/memory.h"
+#include "absl/meta/type_traits.h"
 
 namespace absl {
 ABSL_NAMESPACE_BEGIN
@@ -479,6 +480,33 @@ typename flat_hash_set<T, H, E, A>::size_type erase_if(
 
 namespace container_internal {
 
+// c_for_each_fast(flat_hash_set<>, Function)
+//
+// Container-based version of the <algorithm> `std::for_each()` function to
+// apply a function to a container's elements.
+// There is no guarantees on the order of the function calls.
+// Erasure and/or insertion of elements in the function is not allowed.
+template <typename T, typename H, typename E, typename A, typename Function>
+decay_t<Function> c_for_each_fast(const flat_hash_set<T, H, E, A>& c,
+                                  Function&& f) {
+  container_internal::ForEach(f, &c);
+  return f;
+}
+template <typename T, typename H, typename E, typename A, typename Function>
+decay_t<Function> c_for_each_fast(flat_hash_set<T, H, E, A>& c, Function&& f) {
+  container_internal::ForEach(f, &c);
+  return f;
+}
+template <typename T, typename H, typename E, typename A, typename Function>
+decay_t<Function> c_for_each_fast(flat_hash_set<T, H, E, A>&& c, Function&& f) {
+  container_internal::ForEach(f, &c);
+  return f;
+}
+
+}  // namespace container_internal
+
+namespace container_internal {
+
 template <class T>
 struct FlatHashSetPolicy {
   using slot_type = T;