async-iter-ext 0.2.0

Async iterator methods and async methods for option and result.
Documentation 
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pub trait AsyncOptionTools<T> {
    #[allow(clippy::wrong_self_convention)]
    fn is_some_and_async<F, Fut>(self, f: F) -> impl Future<Output = bool>
    where
        F: FnOnce(T) -> Fut,
        Fut: Future<Output = bool>;

    #[allow(clippy::wrong_self_convention)]
    fn is_none_or_async<F, Fut>(self, f: F) -> impl Future<Output = bool>
    where
        F: FnOnce(T) -> Fut,
        Fut: Future<Output = bool>;

    fn map_async<B, F, Fut>(self, f: F) -> impl Future<Output = Option<B>>
    where
        F: FnOnce(T) -> Fut,
        Fut: Future<Output = B>;
}

impl<T> AsyncOptionTools<T> for Option<T> {
    async fn is_some_and_async<F, Fut>(self, f: F) -> bool
    where
        F: FnOnce(T) -> Fut,
        Fut: Future<Output = bool>,
    {
        if let Some(x) = self {
            f(x).await
        } else {
            false
        }
    }

    async fn is_none_or_async<F, Fut>(self, f: F) -> bool
    where
        F: FnOnce(T) -> Fut,
        Fut: Future<Output = bool>,
    {
        if let Some(x) = self { f(x).await } else { true }
    }

    async fn map_async<B, F, Fut>(self, f: F) -> Option<B>
    where
        F: FnOnce(T) -> Fut,
        Fut: Future<Output = B>,
    {
        if let Some(x) = self {
            Some(f(x).await)
        } else {
            None
        }
    }
}