From 1fa2e84774aaab1314c571be51eca17ca5ee5a36 Mon Sep 17 00:00:00 2001
From: joaquintides <joaquin@tid.es>
Date: Mon, 10 Oct 2022 19:24:14 +0200
Subject: [PATCH] reverted 7caab660113c2c2d1b62024dadd21942ec5ef267 and
 f776ffa0085aa1e6602253d94fe026a1c17ea336

---
 include/boost/unordered/detail/foa.hpp | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/include/boost/unordered/detail/foa.hpp b/include/boost/unordered/detail/foa.hpp
index 356f58ed..f379e80e 100644
--- a/include/boost/unordered/detail/foa.hpp
+++ b/include/boost/unordered/detail/foa.hpp
@@ -1315,7 +1315,7 @@ private:
   }
 
   template<typename Key>
-  std::size_t hash_for(const Key& x)const
+  inline std::size_t hash_for(const Key& x)const
   {
     return mix_policy::mix(h()(x));
   }
@@ -1375,9 +1375,10 @@ private:
   template<typename... Args>
   BOOST_FORCEINLINE std::pair<iterator,bool> emplace_impl(Args&&... args)
   {
-    auto hash=hash_for(key_from(args...));
-    auto pos0=position_for(hash);
-    auto it=find_impl(key_from(args...),pos0,hash);
+    const auto &k=key_from(std::forward<Args>(args)...);
+    auto        hash=hash_for(k);
+    auto        pos0=position_for(hash);
+    auto        it=find_impl(k,pos0,hash);
 
     if(it!=end()){
       return {it,false};