A well-known instance of folly::Unit

Summary: [Folly] A well-known instance of `folly::Unit`.

Reviewed By: jsedgwick

Differential Revision: D2693426

fb-gh-sync-id: fe595abc852500275a827b4f400cfda7091a55f7

diff --git a/folly/futures/Unit.h b/folly/futures/Unit.h
index 521b206bcd150b0a159c097523e6638cf50e8664..bdc70f90c69909c3b13b63fa4ab941a67fb1dd33 100644 (file)
--- a/folly/futures/Unit.h
+++ b/folly/futures/Unit.h
@@ -62,4 +62,6 @@ template <class T>
 struct is_void_or_unit : public Unit::Lift<T>
 {};
 
+constexpr Unit unit {};
+
 }