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use crate::view::View;
use std::any::Any;
pub trait AnyView {
fn as_any(&self) -> &dyn Any;
fn as_any_mut(&mut self) -> &mut dyn Any;
fn as_boxed_any(self: Box<Self>) -> Box<dyn Any>;
}
impl<T: View> AnyView for T {
fn as_any(&self) -> &dyn Any {
self
}
fn as_any_mut(&mut self) -> &mut dyn Any {
self
}
fn as_boxed_any(self: Box<Self>) -> Box<dyn Any> {
self
}
}
impl dyn AnyView {
pub fn downcast_ref<T: Any>(&self) -> Option<&T> {
self.as_any().downcast_ref()
}
pub fn downcast_mut<T: Any>(&mut self) -> Option<&mut T> {
self.as_any_mut().downcast_mut()
}
pub fn downcast<T: Any>(self: Box<Self>) -> Result<Box<T>, Box<Self>> {
if self.as_any().is::<T>() {
Ok(self.as_boxed_any().downcast().unwrap())
} else {
Err(self)
}
}
pub fn is<T: Any>(&mut self) -> bool {
self.as_any().is::<T>()
}
}