From 598983d7a96e19bb84200bed6d8c7e1968123dbe Mon Sep 17 00:00:00 2001
From: Nikolas Klauser <nikolasklauser@berlin.de>
Date: Tue, 1 Feb 2022 21:36:50 +0100
Subject: [libc++][P2321R2] Add specializations of basic_common_reference and
 common_type for pair

Add specializations of basic_common_reference and common_type for pair

Reviewed By: Quuxplusone, Mordante, #libc

Spies: libcxx-commits

Differential Revision: https://reviews.llvm.org/D117506
---
 libcxx/include/utility | 6 ++++++
 1 file changed, 6 insertions(+)

(limited to 'libcxx/include/utility')

diff --git a/libcxx/include/utility b/libcxx/include/utility
index 9dd7905..db68181 100644
--- a/libcxx/include/utility
+++ b/libcxx/include/utility
@@ -95,6 +95,12 @@ struct pair
                                 is_nothrow_swappable_v<T2>);                     // constexpr in C++20
 };
 
+template<class T1, class T2, class U1, class U2, template<class> class TQual, template<class> class UQual>
+struct basic_common_reference<pair<T1, T2>, pair<U1, U2>, TQual, UQual>;         // since C++23
+
+template<class T1, class T2, class U1, class U2>
+struct common_type<pair<T1, T2>, pair<U1, U2>>;                                  // since C++23
+
 template<class T1, class T2> pair(T1, T2) -> pair<T1, T2>;
 
 template <class T1, class T2> bool operator==(const pair<T1,T2>&, const pair<T1,T2>&); // constexpr in C++14
-- 
cgit v1.1