xtra 0.6.0

A tiny actor framework
Documentation 
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use std::future::Future;

#[derive(Clone)]
pub struct Instrumentation {}

#[derive(Clone)]
pub struct Span(());

impl Span {
    pub fn in_scope<R>(&self, f: impl FnOnce() -> R) -> R {
        f()
    }

    pub fn none() -> Span {
        Span(())
    }

    pub fn is_none(&self) -> bool {
        true
    }
}

impl Instrumentation {
    pub fn empty() -> Self {
        Instrumentation {}
    }

    #[allow(unknown_lints, clippy::extra_unused_type_parameters)] // Needs to be consistent with non-stub impl.
    pub fn started<A, M>() -> Self {
        Self::empty()
    }

    pub fn is_parent_none(&self) -> bool {
        true
    }

    pub fn apply<F>(self, fut: F) -> (impl Future<Output = F::Output>, Span)
    where
        F: Future,
    {
        (fut, Span(()))
    }
}