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-rw-r--r--absl/container/node_hash_map.h14
1 files changed, 13 insertions, 1 deletions
diff --git a/absl/container/node_hash_map.h b/absl/container/node_hash_map.h
index 00710e52c577..18d3f28f2202 100644
--- a/absl/container/node_hash_map.h
+++ b/absl/container/node_hash_map.h
@@ -40,6 +40,7 @@
 #include <type_traits>
 #include <utility>
 
+#include "absl/algorithm/container.h"
 #include "absl/container/internal/container_memory.h"
 #include "absl/container/internal/hash_function_defaults.h"  // IWYU pragma: export
 #include "absl/container/internal/node_hash_policy.h"
@@ -91,7 +92,7 @@ class NodeHashMapPolicy;
 //  std::string search_key = "b";
 //  auto result = ducks.find(search_key);
 //  if (result != ducks.end()) {
-//    std::cout << "Result: " << search_key->second << std::endl;
+//    std::cout << "Result: " << result->second << std::endl;
 //  }
 template <class Key, class Value,
           class Hash = absl::container_internal::hash_default_hash<Key>,
@@ -566,5 +567,16 @@ class NodeHashMapPolicy
   static const Value& value(const value_type* elem) { return elem->second; }
 };
 }  // namespace container_internal
+
+namespace container_algorithm_internal {
+
+// Specialization of trait in absl/algorithm/container.h
+template <class Key, class T, class Hash, class KeyEqual, class Allocator>
+struct IsUnorderedContainer<
+    absl::node_hash_map<Key, T, Hash, KeyEqual, Allocator>> : std::true_type {};
+
+}  // namespace container_algorithm_internal
+
 }  // namespace absl
+
 #endif  // ABSL_CONTAINER_NODE_HASH_MAP_H_