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use std::fmt;
use std::marker;
use std::ops::{Deref, DerefMut};
#[derive(Clone, PartialEq)]
pub struct Handle<'a, T: 'a> {
data: T,
_phantom: marker::PhantomData<&'a T>,
}
impl<'a, T: 'a> Handle<'a, T> {
pub fn new(t: T) -> Self {
Self {
data: t,
_phantom: marker::PhantomData,
}
}
}
impl<'a, T> Deref for Handle<'a, T> {
type Target = T;
fn deref(&self) -> &T {
&self.data
}
}
impl<'a, T: fmt::Debug> fmt::Debug for Handle<'a, T> {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
write!(f, "{:?}", self.data)
}
}
pub struct HandleMut<'a, T: 'a> {
data: T,
_phantom: marker::PhantomData<&'a mut T>,
}
impl<'a, T: 'a> HandleMut<'a, T> {
pub fn new(t: T) -> Self {
Self {
data: t,
_phantom: marker::PhantomData,
}
}
}
impl<'a, T> Deref for HandleMut<'a, T> {
type Target = T;
fn deref(&self) -> &T {
&self.data
}
}
impl<'a, T> DerefMut for HandleMut<'a, T> {
fn deref_mut(&mut self) -> &mut T {
&mut self.data
}
}
impl<'a, T: fmt::Debug> fmt::Debug for HandleMut<'a, T> {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
write!(f, "{:?}", self.data)
}
}