use std::ops::Deref;
#[repr(transparent)]
pub struct Immutable<T>(T);
impl<T> Immutable<T> {
pub fn new(value: T) -> Self {
Self(value)
}
#[inline(always)]
fn get_immutable(&self) -> &T {
&self.0
}
}
impl<T> From<T> for Immutable<T> {
fn from(i: T) -> Self {
Self(i)
}
}
impl<T> Deref for Immutable<T> {
type Target = T;
fn deref(&self) -> &Self::Target {
self.get_immutable()
}
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn test_immutable() {
let i = Immutable::new(vec![1, 2, 3]);
assert_eq!(i[2], 3);
}
}