[committed] libstdc++: Add redundant 'typename' to std::projected

[Jonathan Wakely via Gcc-patches]

Tested x86_64-linux. Pushed to trunk.

-- >8 --

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 6802582a459..e32e94dc9fc 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
 
-- 
2.41.0