From 49f2b325ec7a49e41fc107239542eae0eb6d364e Mon Sep 17 00:00:00 2001
From: Jonathan Wakely <jwakely@redhat.com>
Date: Tue, 4 Jul 2023 15:29:35 +0100
Subject: [PATCH] libstdc++: Add redundant 'typename' to std::projected

This is needed by Clang 15.

libstdc++-v3/ChangeLog:

	* include/bits/iterator_concepts.h (projected): Add typename.
---
 libstdc++-v3/include/bits/iterator_concepts.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libstdc++-v3/include/bits/iterator_concepts.h b/libstdc++-v3/include/bits/iterator_concepts.h
index 6802582a459d..e32e94dc9fc0 100644
--- a/libstdc++-v3/include/bits/iterator_concepts.h
+++ b/libstdc++-v3/include/bits/iterator_concepts.h
@@ -798,7 +798,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
   /// [projected], projected
   template<indirectly_readable _Iter,
 	   indirectly_regular_unary_invocable<_Iter> _Proj>
-    using projected = __detail::__projected<_Iter, _Proj>::__type;
+    using projected = typename __detail::__projected<_Iter, _Proj>::__type;
 
   // [alg.req], common algorithm requirements
 
-- 
2.47.2