Accidentally disallowed explicit tuple conversions when all elements of the tuple can be explicitly converted. git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@179467 91177308-0d34-0410-b5e6-96231b3b80d8 
diff --git a/include/tuple b/include/tuple index 7f299e9..0df315e 100644 --- a/include/tuple +++ b/include/tuple 
@@ -477,7 +477,7 @@  template <class _Tuple,  class = typename enable_if  < - __tuple_convertible<_Tuple, tuple<_Tp...> >::value + __tuple_constructible<_Tuple, tuple<_Tp...> >::value  >::type  >  _LIBCPP_INLINE_VISIBILITY