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/Cargo.toml               | 2 +-
 web/examples/tour/Cargo.toml | 2 +-
 web/examples/tour/src/lib.rs | 6 +++---
 web/src/lib.rs               | 2 +-
 4 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/web/Cargo.toml b/web/Cargo.toml
index 0ab89570..43377d46 100644
--- a/web/Cargo.toml
+++ b/web/Cargo.toml
@@ -17,7 +17,7 @@ maintenance = { status = "actively-developed" }
 [dependencies]
 iced = { version = "0.1.0-alpha", path = ".." }
 dodrio = "0.1.0"
-futures = "0.1"
+futures-preview = "=0.3.0-alpha.18"
 wasm-bindgen = "0.2.50"
 
 [dependencies.web-sys]
diff --git a/web/examples/tour/Cargo.toml b/web/examples/tour/Cargo.toml
index c2db46ec..65a860e2 100644
--- a/web/examples/tour/Cargo.toml
+++ b/web/examples/tour/Cargo.toml
@@ -11,7 +11,7 @@ crate-type = ["cdylib"]
 [dependencies]
 iced_web = { path = "../.." }
 wasm-bindgen = "0.2.50"
-futures = "0.1"
+futures-preview = "=0.3.0-alpha.18"
 log = "0.4"
 console_error_panic_hook = "0.1.6"
 console_log = "0.1.2"
diff --git a/web/examples/tour/src/lib.rs b/web/examples/tour/src/lib.rs
index 30855e8b..dbf04df8 100644
--- a/web/examples/tour/src/lib.rs
+++ b/web/examples/tour/src/lib.rs
@@ -1,4 +1,4 @@
-use futures::{future, Future};
+use futures::Future;
 use iced_web::UserInterface;
 use wasm_bindgen::prelude::*;
 
@@ -23,10 +23,10 @@ impl iced_web::UserInterface for Tour {
     fn update(
         &mut self,
         message: tour::Message,
-    ) -> Box<dyn Future<Item = tour::Message, Error = ()>> {
+    ) -> Option<Box<dyn Future<Output = tour::Message>>> {
         self.update(message);
 
-        Box::new(future::err(()))
+        None
     }
 
     fn view(&mut self) -> iced_web::Element<tour::Message> {
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