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Diffstat (limited to '')
-rw-r--r-- | native/src/subscription.rs | 22 |
1 files changed, 21 insertions, 1 deletions
diff --git a/native/src/subscription.rs b/native/src/subscription.rs index 0d002c6c..18750abf 100644 --- a/native/src/subscription.rs +++ b/native/src/subscription.rs @@ -43,5 +43,25 @@ use events::Events; /// [`Subscription`]: type.Subscription.html /// [`Event`]: ../enum.Event.html pub fn events() -> Subscription<Event> { - Subscription::from_recipe(Events) + Subscription::from_recipe(Events { f: Some }) +} + +/// Returns a [`Subscription`] that filters all the runtime events with the +/// provided function, producing messages accordingly. +/// +/// This subscription will call the provided function for every [`Event`] +/// handled by the runtime. If the function: +/// +/// - Returns `None`, the [`Event`] will be discarded. +/// - Returns `Some` message, the `Message` will be produced. +/// +/// [`Subscription`]: type.Subscription.html +/// [`Event`]: ../enum.Event.html +pub fn events_with<Message>( + f: fn(Event) -> Option<Message>, +) -> Subscription<Message> +where + Message: 'static + Send, +{ + Subscription::from_recipe(Events { f }) } |