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use std::any::Any;
pub trait UserData: Any + Send + Sync {
fn clone_boxed(&self) -> Box<UserData>;
fn to_any(&self) -> Box<Any + Send + Sync>;
fn as_any(&self) -> &(Any + Send + Sync);
}
impl<T: Clone + Any + Send + Sync> UserData for T {
#[inline]
fn clone_boxed(&self) -> Box<UserData> {
Box::new(self.clone())
}
#[inline]
fn to_any(&self) -> Box<Any + Send + Sync> {
Box::new(self.clone())
}
#[inline]
fn as_any(&self) -> &(Any + Send + Sync) {
self
}
}
pub(crate) struct UserDataBox(pub Box<UserData>);
impl Clone for UserDataBox {
#[inline]
fn clone(&self) -> Self {
UserDataBox(self.0.clone_boxed())
}
}