terrazzo-client 0.2.19

A simple macro to clone variables before passing them into a `move` closure or async block.
Documentation 
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use super::XSignal;
use super::XSignalInner;
use crate::utils::Ptr;
use crate::utils::PtrWeak;

pub struct XSignalWeak<T>(PtrWeak<XSignalInner<T>>);

impl<T> XSignalWeak<T> {
    pub const fn new() -> Self {
        XSignalWeak(PtrWeak::new())
    }
}

impl<T> XSignalWeak<T> {
    pub fn upgrade(&self) -> Option<XSignal<T>> {
        Some(XSignal(self.0.upgrade()?))
    }
}

impl<T> XSignal<T> {
    pub fn downgrade(&self) -> XSignalWeak<T> {
        XSignalWeak(Ptr::downgrade(&self.0))
    }
}

impl<T> Clone for XSignalWeak<T> {
    fn clone(&self) -> Self {
        Self(self.0.clone())
    }
}

impl<T> Default for XSignalWeak<T> {
    fn default() -> Self {
        Self::new()
    }
}