From 3aaf8955141eaf9db324edbf5c9e0095b90a1641 Mon Sep 17 00:00:00 2001
From: joaquintides <joaquin@tid.es>
Date: Fri, 7 Oct 2022 11:19:20 +0200
Subject: [PATCH] restricted erase generic arg as per C++23 requirements
 (hopefully fixes test errors in VS2015)

---
 include/boost/unordered/detail/foa.hpp | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/include/boost/unordered/detail/foa.hpp b/include/boost/unordered/detail/foa.hpp
index 223fd60d..27d48d57 100644
--- a/include/boost/unordered/detail/foa.hpp
+++ b/include/boost/unordered/detail/foa.hpp
@@ -1091,8 +1091,13 @@ public:
     --size_;
   }
 
-  template<typename Key>
-  std::size_t erase(const Key& x)
+  template<
+    typename Key,
+    typename std::enable_if<
+      !std::is_convertible<Key&&,iterator>::value&&
+      !std::is_convertible<Key&&,const_iterator>::value>::type* =nullptr
+  >
+  std::size_t erase(Key&& x)
   {
     auto it=find(x);
     if(it!=end()){