libstdc++: Add redundant 'typename' to std::projected

This is needed by Clang 15.

libstdc++-v3/ChangeLog:

	* include/bits/iterator_concepts.h (projected): Add typename.

diff --git a/libstdc++-v3/include/bits/iterator_concepts.h b/libstdc++-v3/include/bits/iterator_concepts.h
index 6802582a459d931ebe1cacafac744af6f2965697..e32e94dc9fc0f00a6116394c49905e23551d8510 100644 (file)
--- 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