iced_native/system/
action.rs

1use crate::system;
2
3use iced_futures::MaybeSend;
4use std::fmt;
5
6/// An operation to be performed on the system.
7pub enum Action<T> {
8    /// Query system information and produce `T` with the result.
9    QueryInformation(Box<dyn Closure<T>>),
10}
11
12pub trait Closure<T>: Fn(system::Information) -> T + MaybeSend {}
13
14impl<T, O> Closure<O> for T where T: Fn(system::Information) -> O + MaybeSend {}
15
16impl<T> Action<T> {
17    /// Maps the output of a system [`Action`] using the provided closure.
18    pub fn map<A>(
19        self,
20        f: impl Fn(T) -> A + 'static + MaybeSend + Sync,
21    ) -> Action<A>
22    where
23        T: 'static,
24    {
25        match self {
26            Self::QueryInformation(o) => {
27                Action::QueryInformation(Box::new(move |s| f(o(s))))
28            }
29        }
30    }
31}
32
33impl<T> fmt::Debug for Action<T> {
34    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
35        match self {
36            Self::QueryInformation(_) => write!(f, "Action::QueryInformation"),
37        }
38    }
39}
iced_native/system/action.rs

iced_native/system/
action.rs
