From 1f4a82214560abd7d83cbbe8027be90885e22d88 Mon Sep 17 00:00:00 2001
From: Yedidya Feldblum <yfeldblum@fb.com>
Date: Tue, 24 Nov 2015 20:26:15 -0800
Subject: [PATCH] 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
---
 folly/futures/Unit.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/folly/futures/Unit.h b/folly/futures/Unit.h
index 521b206b..bdc70f90 100644
--- 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 {};
+
 }
-- 
2.34.1