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Introduce and_then methods for fallible Tasks

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Héctor Ramón Jiménez 2024-06-20 01:11:21 +02:00
parent 65c8e08b44
commit bdd30f7ab8
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1 changed files with 33 additions and 0 deletions
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33
runtime/src/task.rs
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@ -242,6 +242,39 @@ impl<T> Task<T> {
}
}
impl<T> Task<Option<T>> {
/// Executes a new [`Task`] after this one, only when it produces `Some` value.
///
/// The value is provided to the closure to create the subsequent [`Task`].
pub fn and_then<A>(
self,
f: impl Fn(T) -> Task<A> + MaybeSend + 'static,
) -> Task<A>
where
T: MaybeSend + 'static,
A: MaybeSend + 'static,
{
self.then(move |option| option.map_or_else(Task::none, &f))
}
}
impl<T, E> Task<Result<T, E>> {
/// Executes a new [`Task`] after this one, only when it succeeds with an `Ok` value.
///
/// The success value is provided to the closure to create the subsequent [`Task`].
pub fn and_then<A>(
self,
f: impl Fn(T) -> Task<A> + MaybeSend + 'static,
) -> Task<A>
where
T: MaybeSend + 'static,
E: MaybeSend + 'static,
A: MaybeSend + 'static,
{
self.then(move |option| option.map_or_else(|_| Task::none(), &f))
}
}
impl<T> From<()> for Task<T>
where
T: MaybeSend + 'static,