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use std::cmp::PartialEq;
use std::fmt::{self, Debug};
use std::ops::Deref;
fn get_unique_id() -> u64 {
use std::sync::atomic::{AtomicU64, Ordering};
static EQ_COUNTER: AtomicU64 = AtomicU64::new(1);
EQ_COUNTER.fetch_add(1, Ordering::Relaxed)
}
#[derive(Clone)]
pub struct EqBox<T> {
id: u64,
pub value: T,
}
impl<T> EqBox<T> {
pub fn new(value: T) -> EqBox<T> {
EqBox {
id: get_unique_id(),
value,
}
}
pub fn into_inner(self) -> T {
self.value
}
}
impl<T> Deref for EqBox<T> {
type Target = T;
fn deref(&self) -> &T {
&self.value
}
}
impl<T> PartialEq for EqBox<T> {
fn eq(&self, other: &EqBox<T>) -> bool {
self.id == other.id
}
}
impl<T> Debug for EqBox<T> {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
f.debug_struct("EqBox")
.field("id", &self.id)
.field("value", &"---")
.finish()
}
}