Fix PR26961 - Add default constructor to std::pointer_safety struct.

In ABI v1 libc++ implements std::pointer_safety as a class type instead
of an enumeration. However this class type does not provide
a default constructor as it should. This patch adds that default constructor.

llvm-svn: 291059

1 files changed, 3 insertions, 0 deletions

diff --git a/libcxx/include/memory b/libcxx/include/memory
index 3ea9a77d0d4..a38d95b9446 100644
--- a/libcxx/include/memory
+++ b/libcxx/include/memory
@@ -5637,6 +5637,9 @@ struct _LIBCPP_TYPE_VIS pointer_safety
     __lx __v_;
 
     _LIBCPP_INLINE_VISIBILITY
+    pointer_safety() : __v_() {}
+
+    _LIBCPP_INLINE_VISIBILITY
     pointer_safety(__lx __v) : __v_(__v) {}
     _LIBCPP_INLINE_VISIBILITY
     operator int() const {return __v_;}