From a165f4919e947d25bedb6fa082f17d18d38f31fb Mon Sep 17 00:00:00 2001
From: Nigel Stewart <nigels@nigels.com>
Date: Fri, 5 Sep 2025 16:10:15 +1000
Subject: [PATCH] Partial revert of changes for Issue #209 - compiler warnings

Issue #248 concerns reduced performance due to commit 0d5068a0cc8b9aa74776bfc256759b0e8096eb71
---
 include/boost/container/detail/pair.hpp | 14 +++++++++-----
 1 file changed, 9 insertions(+), 5 deletions(-)

diff --git a/include/boost/container/detail/pair.hpp b/include/boost/container/detail/pair.hpp
index 0e84ffbf..d63a8ddf 100644
--- a/include/boost/container/detail/pair.hpp
+++ b/include/boost/container/detail/pair.hpp
@@ -555,7 +555,8 @@ template<class A, class B>
 struct is_trivially_copy_assignable
    <boost::container::dtl::pair<A,B> >
 {
-   BOOST_STATIC_CONSTEXPR bool value = false ;
+   BOOST_STATIC_CONSTEXPR bool value = boost::move_detail::is_trivially_copy_assignable<A>::value &&
+                                       boost::move_detail::is_trivially_copy_assignable<B>::value;
 };
 
 template<class T>
@@ -565,7 +566,8 @@ template<class A, class B>
 struct is_trivially_move_assignable
    <boost::container::dtl::pair<A,B> >
 {
-   BOOST_STATIC_CONSTEXPR bool value = false;
+   BOOST_STATIC_CONSTEXPR bool value = boost::move_detail::is_trivially_move_assignable<A>::value &&
+                                       boost::move_detail::is_trivially_move_assignable<B>::value;
 };
 
 template<class T>
@@ -574,7 +576,8 @@ struct is_trivially_copy_assignable;
 template<class A, class B>
 struct is_trivially_copy_constructible<boost::container::dtl::pair<A,B> >
 {
-   BOOST_STATIC_CONSTEXPR bool value = false;
+   BOOST_STATIC_CONSTEXPR bool value = boost::move_detail::is_trivially_copy_constructible<A>::value &&
+                                       boost::move_detail::is_trivially_copy_constructible<B>::value;
 };
 
 template<class T>
@@ -583,7 +586,8 @@ struct is_trivially_move_assignable;
 template<class A, class B>
 struct is_trivially_move_constructible<boost::container::dtl::pair<A,B> >
 {
-   BOOST_STATIC_CONSTEXPR bool value = false;
+   BOOST_STATIC_CONSTEXPR bool value = boost::move_detail::is_trivially_move_constructible<A>::value &&
+                                       boost::move_detail::is_trivially_move_constructible<B>::value;
 };
 
 template<class T>
@@ -593,7 +597,7 @@ template<class A, class B>
 struct is_trivially_destructible<boost::container::dtl::pair<A,B> >
 {
    BOOST_STATIC_CONSTEXPR bool value = boost::move_detail::is_trivially_destructible<A>::value &&
-                             boost::move_detail::is_trivially_destructible<B>::value ;
+                                       boost::move_detail::is_trivially_destructible<B>::value;
 };