experimental_reactive/
ext.rs

1use std::marker::PhantomData;
2use reactive::*;
3
4pub struct MergedSignals<S, Y>(S, Y);
5
6/// Merge two signals to act as one
7pub fn merge<S, Y>(left: S, right: Y) -> MergedSignals<S, Y> {
8	MergedSignals(left, right)
9}
10
11impl<T, S, Y, X> Signal<T, X> for MergedSignals<S, Y> where S: Signal<T, X>, Y: Signal<T, X>, X: Clone + Slot<T> {
12	type Connected = (S::Connected, Y::Connected);
13	fn connect_slot(self, slot: X) -> (S::Connected, Y::Connected) {
14		(self.0.connect_slot(slot.clone()), self.1.connect_slot(slot))
15	}
16}
17
18
19
20
21pub trait SignalExt: Sized {
22	fn map<T, R, F>(self, f: F) -> MappedSignal<T, R, Self, F> where F: Fn(T)->R, T: Clone { MappedSignal(self, f, PhantomData) }
23}
24
25pub struct MappedSignal<T, R, X, F>(X, F, PhantomData<(T, R)>);
26pub struct MappedSlot<T, R, X, F>(X, F, PhantomData<(T, R)>);
27
28impl<T, R, S, X, F> Signal<R, S> for MappedSignal<T, R, X, F> where F: Fn(T)->R, X: Signal<T, MappedSlot<T, R, S, F>>, S: Slot<R>, T: Clone {
29	type Connected = X::Connected;
30	fn connect_slot(self, slot: S) -> Self::Connected {
31		self.0.connect_slot(MappedSlot(slot, self.1, PhantomData))
32	}
33}
34
35impl<T, R, X, F> Slot<T> for MappedSlot<T, R, X, F> where F: Fn(T)->R, X: Slot<R>, T: Clone {
36	fn push(&self, value: T) -> Result<(), SlotError<T>> {
37		self.0.push((self.1)(value.clone())).map_err(|err| 
38			match err {
39				Full(_) => Full(value),
40				SomeFull => SomeFull
41			}
42		)
43	}
44}
experimental_reactive/ext.rs

experimental_reactive/
ext.rs
