Future<Unit> global fixup

[folly.git] / folly / Optional.h

diff --git a/folly/Optional.h b/folly/Optional.h
index ee94228e8169593a1e6689323b31de67f8a268e6..f4bc9ff4ce7a36bb47eb82f7a5d49a4d5d7a7e10 100644 (file)
--- a/folly/Optional.h
+++ b/folly/Optional.h
@@ -87,6 +87,8 @@ class Optional {
  public:
   static_assert(!std::is_reference<Value>::value,
                 "Optional may not be used with reference types");
+  static_assert(!std::is_abstract<Value>::value,
+                "Optional may not be used with abstract types");
 
   Optional()
     : hasValue_(false) {