Trait WatcherHolder 

pub trait WatcherHolder<'ctx, O: ?Sized>: Clone {
    type Content: ?Sized;

    // Required method
    fn get_mut<F, R>(&self, owner: &mut O, f: F) -> Option<R>
       where F: FnOnce(&mut Self::Content) -> R;
}

Required Associated Types

type Content: ?Sized

Required Methods

fn get_mut<F, R>(&self, owner: &mut O, f: F) -> Option<R>

where F: FnOnce(&mut Self::Content) -> R,

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementations on Foreign Types

impl<'ctx, T, O> WatcherHolder<'ctx, O> for Weak<RefCell<T>>

where T: ?Sized + Watcher<'ctx, O>, O: ?Sized,

type Content = T

fn get_mut<F, R>(&self, _owner: &mut O, f: F) -> Option<R>

where F: FnOnce(&mut Self::Content) -> R,

Implementors