From 958fe7d326513d7193cfd522334291869b029da5 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ion=20Gazta=C3=B1aga?= <igaztanaga@gmail.com>
Date: Mon, 16 Feb 2026 22:53:37 +0100
Subject: [PATCH] Fixes #330: ("boost/container/detail/pair.hpp: partial
 specializations of boost::move_detail traits for std::pair break Unity
 (jumbo)")

---
 doc/container.qbk                       |  1 +
 include/boost/container/detail/pair.hpp | 57 +------------------------
 2 files changed, 2 insertions(+), 56 deletions(-)

diff --git a/doc/container.qbk b/doc/container.qbk
index 168819a..8592f9c 100644
--- a/doc/container.qbk
+++ b/doc/container.qbk
@@ -1489,6 +1489,7 @@ collect them containers and build [*Boost.Container], a library targeted to a wi
 * Fixed bugs/issues:
    * [@https://github.com/boostorg/container/issues/323 GitHub #323: ['"flat_tree::try_emplace UB"]].
    * [@https://github.com/boostorg/container/issues/328 GitHub #328: ['"boost::container::deque stores a redundant copy of the allocator, increasing size"]].
+   * [@https://github.com/boostorg/container/issues/330 GitHub #330: ['"boost/container/detail/pair.hpp: partial specializations of boost::move_detail traits for std::pair break Unity (jumbo)"]].
 
 [endsect]
 
diff --git a/include/boost/container/detail/pair.hpp b/include/boost/container/detail/pair.hpp
index 1f263dd..b61f080 100644
--- a/include/boost/container/detail/pair.hpp
+++ b/include/boost/container/detail/pair.hpp
@@ -500,14 +500,6 @@ struct is_class_or_union< ::boost::container::dtl::pair<T1, T2> >
    BOOST_STATIC_CONSTEXPR bool value = true;
 };
 
-template <class T1, class T2>
-struct is_class_or_union< std::pair<T1, T2> >
-//This specialization is needed to avoid instantiation of pair in
-//is_class, and allow recursive maps.
-{
-   BOOST_STATIC_CONSTEXPR bool value = true;
-};
-
 template<class T>
 struct is_union;
 
@@ -519,14 +511,6 @@ struct is_union< ::boost::container::dtl::pair<T1, T2> >
    BOOST_STATIC_CONSTEXPR bool value = false;
 };
 
-template <class T1, class T2>
-struct is_union< std::pair<T1, T2> >
-//This specialization is needed to avoid instantiation of pair in
-//is_class, and allow recursive maps.
-{
-   BOOST_STATIC_CONSTEXPR bool value = false;
-};
-
 template<class T>
 struct is_class;
 
@@ -538,16 +522,8 @@ struct is_class< ::boost::container::dtl::pair<T1, T2> >
    BOOST_STATIC_CONSTEXPR bool value = true;
 };
 
-template <class T1, class T2>
-struct is_class< std::pair<T1, T2> >
-//This specialization is needed to avoid instantiation of pair in
-//is_class, and allow recursive maps.
-{
-   BOOST_STATIC_CONSTEXPR bool value = true;
-};
-
-
 //Triviality of pair
+// std::pair specializations defined in Boost.Move
 
 //
 // is_trivially_copy_assignable
@@ -563,11 +539,6 @@ struct is_trivially_copy_assignable<boost::container::dtl::pair<A,B> >
                                        boost::move_detail::is_trivially_copy_assignable<B>::value;
 };
 
-template<class A, class B>
-struct is_trivially_copy_assignable<std::pair<A,B> >
-   : is_trivially_copy_assignable<boost::container::dtl::pair<A,B> >
-{};
-
 //
 // is_trivially_move_assignable
 //
@@ -582,12 +553,6 @@ struct is_trivially_move_assignable<boost::container::dtl::pair<A,B> >
                                        boost::move_detail::is_trivially_move_assignable<B>::value;
 };
 
-template<class A, class B>
-struct is_trivially_move_assignable<std::pair<A,B> >
-   : is_trivially_move_assignable<boost::container::dtl::pair<A,B> >
-{};
-
-
 //
 // is_trivially_copy_constructible
 //
@@ -602,11 +567,6 @@ struct is_trivially_copy_constructible<boost::container::dtl::pair<A,B> >
                                        boost::move_detail::is_trivially_copy_constructible<B>::value;
 };
 
-template<class A, class B>
-struct is_trivially_copy_constructible<std::pair<A,B> >
-   : is_trivially_copy_constructible<boost::container::dtl::pair<A,B> >
-{};
-
 //
 // is_trivially_move_constructible
 //
@@ -621,11 +581,6 @@ struct is_trivially_move_constructible<boost::container::dtl::pair<A,B> >
                                        boost::move_detail::is_trivially_move_constructible<B>::value;
 };
 
-template<class A, class B>
-struct is_trivially_move_constructible<std::pair<A,B> >
-   : is_trivially_move_constructible<boost::container::dtl::pair<A,B> >
-{};
-
 template<class T>
 struct is_trivially_destructible;
 
@@ -636,11 +591,6 @@ struct is_trivially_destructible<boost::container::dtl::pair<A,B> >
                                        boost::move_detail::is_trivially_destructible<B>::value;
 };
 
-template<class A, class B>
-struct is_trivially_destructible<std::pair<A,B> >
-   : is_trivially_destructible<boost::container::dtl::pair<A,B> >
-{};
-
 }  //namespace move_detail{
 
 template<class T>
@@ -653,11 +603,6 @@ struct has_trivial_destructor_after_move<boost::container::dtl::pair<A,B> >
                                        boost::has_trivial_destructor_after_move<B>::value;
 };
 
-template<class A, class B>
-struct has_trivial_destructor_after_move<std::pair<A,B> >
-   : has_trivial_destructor_after_move<boost::container::dtl::pair<A,B> >
-{};
-
 }  //namespace boost {
 
 #include <boost/container/detail/config_end.hpp>