From 202a43804422d823ec524cfc691dbc638c110920 Mon Sep 17 00:00:00 2001
From: Christian Mazakas <christian.mazakas@gmail.com>
Date: Wed, 29 Dec 2021 11:42:46 -0800
Subject: [PATCH] Implement heterogeneous `find()` for multiset

---
 include/boost/unordered/unordered_set.hpp | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/include/boost/unordered/unordered_set.hpp b/include/boost/unordered/unordered_set.hpp
index f710c702..ecb12bda 100644
--- a/include/boost/unordered/unordered_set.hpp
+++ b/include/boost/unordered/unordered_set.hpp
@@ -1053,6 +1053,16 @@ namespace boost {
 
       const_iterator find(const key_type&) const;
 
+      template <class Key>
+      typename boost::enable_if_c<detail::are_transparent<Key, H, P>::value,
+        const_iterator>::type
+      find(const Key& k) const
+      {
+        return const_iterator(table_.find_node_impl(
+          table::policy::apply_hash(this->hash_function(), k), k,
+          this->key_eq()));
+      }
+
       template <class CompatibleKey, class CompatibleHash,
         class CompatiblePredicate>
       const_iterator find(CompatibleKey const&, CompatibleHash const&,