OuterViewPort: map_value() & map_key()
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parent
2da96c5482
commit
852e1807db
2 changed files with 105 additions and 15 deletions
81
src/main.rs
81
src/main.rs
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@ -1,5 +1,6 @@
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#![feature(trait_alias)]
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#![feature(assoc_char_funcs)]
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pub mod view;
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pub mod port;
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@ -32,7 +33,7 @@ impl<T: Clone + Eq + Send + Sync + 'static> SingletonBuffer<T> {
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port.set_view_fn({
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let data = data.clone();
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move |new_val| data.read().unwrap().clone()
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move |_| data.read().unwrap().clone()
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});
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SingletonBuffer {
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@ -51,36 +52,88 @@ impl<T: Clone + Eq + Send + Sync + 'static> SingletonBuffer<T> {
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}
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}
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impl<T: Clone + Send + Sync> View for Vec<T> {
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type Key = usize;
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type Value = T;
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fn view(&self, key: usize) -> Option<T> {
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self.get(key).cloned()
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}
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}
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struct VecBuffer<T: Clone + Eq + Send + Sync + 'static> {
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data: Arc<RwLock<Vec<T>>>,
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port: InnerViewPort<usize, T>
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}
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impl<T: Clone + Eq + Send + Sync + 'static> VecBuffer<T> {
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fn new(port: InnerViewPort<usize, T>) -> Self {
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let data = Arc::new(RwLock::new(Vec::new()));
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port.set_view(data.clone());
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VecBuffer { data, port }
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}
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fn push(&mut self, val: T) {
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self.port.notify({
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let mut d = self.data.write().unwrap();
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let len = d.len();
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d.push(val);
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len
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});
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}
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}
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#[async_std::main]
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async fn main() {
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let view_port = port::ViewPort::<(), char>::new();
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let digits = port::ViewPort::new();
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let mut buf = VecBuffer::new(digits.inner());
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let mut buf = SingletonBuffer::new(view_port.inner());
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let digit_view = digits.outer()
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let view = view_port.outer().get_view();
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let mut stream = view_port.outer().stream().map({
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move |_| view.view(()).unwrap()
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// digit encoding
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.map_value(
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|digit|
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if let Some(digit) = digit {
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char::from_digit(digit, 16)
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} else {
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None
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}
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)
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// simple horizontal layout
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.map_key(
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|idx| Vector2::<i16>::new(idx as i16, 0),
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|pos| pos.x as usize
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);
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let view = digit_view.get_view();
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let mut stream = digit_view.stream().map({
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move |idx| (idx, view.view(idx))
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});
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let fut = task::spawn({
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async move {
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while let Some(val) = stream.next().await {
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println!("{}", val);
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while let Some((idx, val)) = stream.next().await {
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println!("v[{:?}] = {:?}", idx, val);
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}
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println!("end print task");
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}
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});
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buf.update('a');
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buf.update('b');
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buf.push(0);
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buf.push(1);
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task::sleep(std::time::Duration::from_secs(1)).await;
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buf.update('c');
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buf.update('d');
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buf.push(2);
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buf.push(3);
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task::sleep(std::time::Duration::from_secs(1)).await;
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buf.update('e');
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buf.push(4);
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drop(buf);
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drop(view_port);
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drop(digits);
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drop(digit_view);
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fut.await;
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}
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39
src/port.rs
39
src/port.rs
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@ -1,6 +1,6 @@
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use {
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std::{
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sync::{Arc, Weak, RwLock},
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sync::{Arc, RwLock},
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collections::HashSet,
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hash::Hash,
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},
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@ -81,6 +81,43 @@ impl<K: Eq + Hash + Send + Sync + 'static, V: Send + Sync + 'static> OuterViewPo
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}
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}
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impl<K: Clone + Eq + Hash + Send + Sync + 'static, V: Send + Sync + 'static> OuterViewPort<K, V> {
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pub fn map_value<
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V2: Clone + Send + Sync + 'static,
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F: Fn(Option<V>) -> Option<V2> + Send + Sync + 'static
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>(
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self,
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f: F
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) -> OuterViewPort<K, V2> {
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let port = ViewPort::new();
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let view = self.add_observer_fn({
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let dst = port.inner();
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move |key| dst.notify(key)
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});
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port.inner().set_view_fn(move |key| f(view.view(key)));
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port.outer()
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}
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pub fn map_key<
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K2: Clone + Send + Sync + 'static,
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F1: Fn(K) -> K2 + Send + Sync + 'static,
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F2: Fn(K2) -> K + Send + Sync + 'static
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>(
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self,
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f1: F1,
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f2: F2
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) -> OuterViewPort<K2, V> {
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let port = ViewPort::new();
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let view = self.add_observer_fn({
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let dst = port.inner();
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move |key| dst.notify(f1(key))
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});
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port.inner().set_view_fn(move |key| view.view(f2(key)));
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port.outer()
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}
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}
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//<<<<>>>><<>><><<>><<<*>>><<>><><<>><<<<>>>>
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impl<K: Send + Sync + 'static, V: Send + Sync + 'static> InnerViewPort<K, V> {
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