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use std::rc::Weak;
///
/// This trait is useful when implementing the weak-self design pattern.
///
pub trait WeakSelf
{
fn weak_self(&self) -> Weak<Self>;
fn weak_self_ref(&self) -> &Weak<Self>;
}
///
/// This macro helps you implement the weak-self design pattern.
///
#[macro_export]
macro_rules! impl_weak_self_trait
{
($object_type:ty) =>
{
impl WeakSelf for $object_type
{
fn weak_self(&self) -> Weak<Self>
{
self.weak_self.clone()
}
fn weak_self_ref(&self) -> &Weak<Self>
{
&self.weak_self
}
}
}
}