7 files changed, 9 insertions, 43 deletions
diff --git a/core/Cargo.toml b/core/Cargo.toml
index 5e1a5532..22bc7ceb 100644
--- a/core/Cargo.toml
+++ b/core/Cargo.toml
@@ -7,14 +7,4 @@ description = "The essential concepts of Iced"
 license = "MIT"
 repository = "https://github.com/hecrj/iced"
 
-[features]
-# Exposes a future-based `Command` type
-command = ["futures"]
-# Exposes a future-based `Subscription` type
-subscription = ["futures", "log"]
-# Exposes a `runtime` module meant to abstract over different future executors
-runtime = ["command", "subscription"]
-
 [dependencies]
-futures = { version = "0.3", optional = true }
-log = { version = "0.4", optional = true }
diff --git a/core/src/lib.rs b/core/src/lib.rs
index 760acefe..bec307ad 100644
--- a/core/src/lib.rs
+++ b/core/src/lib.rs
@@ -32,21 +32,3 @@ pub use length::Length;
 pub use point::Point;
 pub use rectangle::Rectangle;
 pub use vector::Vector;
-
-#[cfg(feature = "command")]
-mod command;
-
-#[cfg(feature = "command")]
-pub use command::Command;
-
-#[cfg(feature = "subscription")]
-pub mod subscription;
-
-#[cfg(feature = "subscription")]
-pub use subscription::Subscription;
-
-#[cfg(feature = "runtime")]
-mod runtime;
-
-#[cfg(feature = "runtime")]
-pub use runtime::Runtime;
diff --git a/core/src/runtime/executor.rs b/core/src/runtime/executor.rs
deleted file mode 100644
index d171c6d5..00000000
--- a/core/src/runtime/executor.rs
+++ /dev/null
@@ -1,11 +0,0 @@
-use futures::Future;
-
-pub trait Executor {
-    fn new() -> Self;
-
-    fn spawn(&self, future: impl Future<Output = ()> + Send + 'static);
-
-    fn enter<R>(&self, f: impl FnOnce() -> R) -> R {
-        f()
-    }
-}
diff --git a/core/src/command.rs b/futures/src/command.rs
index e7885fb8..e7885fb8 100644
--- a/core/src/command.rs
+++ b/futures/src/command.rs
diff --git a/core/src/runtime.rs b/futures/src/runtime.rs
index 31234d11..bc1ad8ac 100644
--- a/core/src/runtime.rs
+++ b/futures/src/runtime.rs
@@ -1,3 +1,4 @@
+//! Run commands and subscriptions.
 mod executor;
 
 pub use executor::Executor;
@@ -10,8 +11,8 @@ use std::marker::PhantomData;
 #[derive(Debug)]
 pub struct Runtime<Hasher, Event, Executor, Receiver, Message> {
     executor: Executor,
-    subscriptions: subscription::Tracker<Hasher, Event>,
     receiver: Receiver,
+    subscriptions: subscription::Tracker<Hasher, Event>,
     _message: PhantomData<Message>,
 }
 
@@ -28,15 +29,19 @@ where
         + 'static,
     Message: Send + 'static,
 {
-    pub fn new(receiver: Receiver) -> Self {
+    pub fn new(executor: Executor, receiver: Receiver) -> Self {
         Self {
-            executor: Executor::new(),
-            subscriptions: subscription::Tracker::new(),
+            executor,
             receiver,
+            subscriptions: subscription::Tracker::new(),
             _message: PhantomData,
         }
     }
 
+    pub fn enter<R>(&self, f: impl FnOnce() -> R) -> R {
+        self.executor.enter(f)
+    }
+
     pub fn spawn(&mut self, command: Command<Message>) {
         use futures::{FutureExt, SinkExt};
 
diff --git a/core/src/subscription.rs b/futures/src/subscription.rs
index 87e51e48..87e51e48 100644
--- a/core/src/subscription.rs
+++ b/futures/src/subscription.rs
diff --git a/core/src/subscription/tracker.rs b/futures/src/subscription/tracker.rs
index a942b619..a942b619 100644
--- a/core/src/subscription/tracker.rs
+++ b/futures/src/subscription/tracker.rs