From 40c5c6907a76d5bbd60cbfa495f8dc4ee2140828 Mon Sep 17 00:00:00 2001
From: joaquintides <joaquin@tid.es>
Date: Sat, 25 Mar 2023 18:50:25 +0100
Subject: [PATCH] fixed const-casting in erase_if(foa::table&,...)

---
 include/boost/unordered/detail/foa/table.hpp | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/include/boost/unordered/detail/foa/table.hpp b/include/boost/unordered/detail/foa/table.hpp
index 3145a14d..5713ccda 100644
--- a/include/boost/unordered/detail/foa/table.hpp
+++ b/include/boost/unordered/detail/foa/table.hpp
@@ -422,10 +422,16 @@ public:
   template<typename Predicate>
   friend std::size_t erase_if(table& x,Predicate& pr)
   {
+    using value_reference=typename std::conditional<
+      std::is_same<key_type,value_type>::value,
+      const_reference,
+      reference
+    >::type;
+
     std::size_t s=x.size();
     x.for_all_elements(
       [&](group_type* pg,unsigned int n,element_type* p){
-        if(pr(const_cast<const value_type&>(type_policy::value_from(*p)))){
+        if(pr(const_cast<value_reference>(type_policy::value_from(*p)))){
           x.super::erase(pg,n,p);
         }
       });