commit c1bcd4c1f280e40d25dada5573e1a51de69a991a
author Marshall Clow <mclow.lists@gmail.com> Wed May 17 15:30:01 2017 +0000
committer Marshall Clow <mclow.lists@gmail.com> Wed May 17 15:30:01 2017 +0000
tree fc904e5d37ac5e1c052d570e21175a706e6963ac
parent 6dc120a41d01d49398a28d96a833d5f31d339146

Mark the copy constructor and move 
constructor to be constexpr. This only works when the contained type has a constexpr copy/move ctor.

llvm-svn: 303268

libcxx/include/optional

diff --git a/libcxx/include/optional b/libcxx/include/optional
index 8c7a242..70b6eb4 100644
--- a/libcxx/include/optional
+++ b/libcxx/include/optional
@@ -599,8 +599,8 @@
 public:
 
     _LIBCPP_INLINE_VISIBILITY constexpr optional() noexcept {}
-    _LIBCPP_INLINE_VISIBILITY optional(const optional&) = default;
-    _LIBCPP_INLINE_VISIBILITY optional(optional&&) = default;
+    _LIBCPP_INLINE_VISIBILITY constexpr optional(const optional&) = default;
+    _LIBCPP_INLINE_VISIBILITY constexpr optional(optional&&) = default;
     _LIBCPP_INLINE_VISIBILITY constexpr optional(nullopt_t) noexcept {}
 
     template <class... _Args, class = enable_if_t<