From 2b032d0c7d072a95c96159ed75bcbf6d59bf6c8d Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ion=20Gazta=C3=B1aga?= <igaztanaga@gmail.com>
Date: Thu, 13 Aug 2026 03:03:46 +0200
Subject: [PATCH] Add missing type_identity to hub's constructor

---
 include/boost/container/hub.hpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/include/boost/container/hub.hpp b/include/boost/container/hub.hpp
index 93e59d7..2a596de 100644
--- a/include/boost/container/hub.hpp
+++ b/include/boost/container/hub.hpp
@@ -1078,7 +1078,8 @@ public:
    //! <b>Requires</b>: T is CopyInsertable into the hub.
    //!
    //! <b>Complexity</b>: Linear in il.size().
-   hub(std::initializer_list<T> il, const allocator_type& al_ = allocator_type()):
+   hub(std::initializer_list<T> il
+      , const BOOST_CONTAINER_DOC1ST(allocator_type, dtl::type_identity_t<allocator_type>) &al_ = allocator_type()):
       hub(il.begin(), il.end(), al_) {}
 
    //! <b>Effects</b>: Destroys all elements and deallocates all blocks.