D4451: Fix copy/move issues casude by __tuple_leafs's converting constructor git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@213888 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/include/__tuple b/include/__tuple index de35cb8..ee5b916 100644 --- a/include/__tuple +++ b/include/__tuple
@@ -27,6 +27,32 @@ _LIBCPP_BEGIN_NAMESPACE_STD +// __lazy_and + +template <bool _Last, class ..._Preds> +struct __lazy_and_impl; + +template <class ..._Preds> +struct __lazy_and_impl<false, _Preds...> : false_type {}; + +template <> +struct __lazy_and_impl<true> : true_type {}; + +template <class _Pred> +struct __lazy_and_impl<true, _Pred> : integral_constant<bool, _Pred::type::value> {}; + +template <class _Hp, class ..._Tp> +struct __lazy_and_impl<true, _Hp, _Tp...> : __lazy_and_impl<_Hp::type::value, _Tp...> {}; + +template <class _P1, class ..._Pr> +struct __lazy_and : __lazy_and_impl<_P1::type::value, _Pr...> {}; + +// __lazy_not + +template <class _Pred> +struct __lazy_not : integral_constant<bool, !_Pred::type::value> {}; + + template <class _Tp> class _LIBCPP_TYPE_VIS_ONLY tuple_size; template <class _Tp> 