Fix inconsistency in tuple's SFINAE. Patch from Andrey Khalyavin" git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@294106 91177308-0d34-0410-b5e6-96231b3b80d8 
diff --git a/include/tuple b/include/tuple index a17ea01..b48e2d6 100644 --- a/include/tuple +++ b/include/tuple 
@@ -751,7 +751,7 @@  _CheckArgsConstructor<  !_EnableImplicitReducedArityExtension  && sizeof...(_Up) < sizeof...(_Tp) - && !_PackExpandsToThisTuple<_Up...>() + && !_PackExpandsToThisTuple<_Up...>::value  >::template __enable_implicit<_Up...>(),  bool  >::type = false