//! An `async-std` backend. use futures::Future; /// An `async-std` executor. #[derive(Debug)] pub struct Executor; impl crate::Executor for Executor { fn new() -> Result { Ok(Self) } #[allow(clippy::let_underscore_future)] fn spawn(&self, future: impl Future + Send + 'static) { let _ = async_std::task::spawn(future); } } pub mod time { //! Listen and react to time. use crate::subscription::{self, Hasher, Subscription}; /// Returns a [`Subscription`] that produces messages at a set interval. /// /// The first message is produced after a `duration`, and then continues to /// produce more messages every `duration` after that. pub fn every( duration: std::time::Duration, ) -> Subscription { Subscription::from_recipe(Every(duration)) } #[derive(Debug)] struct Every(std::time::Duration); impl subscription::Recipe for Every { type Output = std::time::Instant; fn hash(&self, state: &mut Hasher) { use std::hash::Hash; std::any::TypeId::of::().hash(state); self.0.hash(state); } fn stream( self: Box, _input: subscription::EventStream, ) -> futures::stream::BoxStream<'static, Self::Output> { use futures::stream::StreamExt; async_std::stream::interval(self.0) .map(|_| std::time::Instant::now()) .boxed() } } }