From dd093c79d7da84675be648c7df2ebfc85b5039f2 Mon Sep 17 00:00:00 2001
From: Héctor Ramón Jiménez <hector0193@gmail.com>
Date: Mon, 16 Sep 2019 18:03:57 +0200
Subject: Use `futures-preview` instead of `futures`

---
 web/src/lib.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'web/src/lib.rs')

diff --git a/web/src/lib.rs b/web/src/lib.rs
index 3173e736..5a0dd6f2 100644
--- a/web/src/lib.rs
+++ b/web/src/lib.rs
@@ -19,7 +19,7 @@ pub trait UserInterface {
     fn update(
         &mut self,
         message: Self::Message,
-    ) -> Box<dyn Future<Item = Self::Message, Error = ()>>;
+    ) -> Option<Box<dyn Future<Output = Self::Message>>>;
 
     fn view(&mut self) -> Element<Self::Message>;
 
-- 
cgit