bundle_sources/
immutable.rs

1// Copyright 2020 Ian Jackson
2// SPDX-License-Identifier: GPL-3.0-or-later
3// There is NO WARRANTY.
4
5use std::ops::Deref;
6use std::fmt::{Display,Debug,Formatter,self};
7
8pub struct Immutable<T> (T);
9impl<T> Immutable<T> {
10  pub fn new(t : T) -> Immutable<T> { Immutable(t) }
11}
12impl<T> Deref for Immutable<T> {
13  type Target = T;
14  fn deref(&self) -> &T { &self.0 }
15}
16impl<T> From<T> for Immutable<T> {
17  fn from(t : T) -> Immutable<T> { Immutable(t) }
18}
19
20impl<T : Display> Display for Immutable<T> {
21  fn fmt(&self, fmt : &mut Formatter) -> Result<(),fmt::Error> {
22    self.0.fmt(fmt)
23  }
24}
25impl<T : Debug> Debug for Immutable<T> {
26  fn fmt(&self, fmt : &mut Formatter) -> Result<(),fmt::Error> {
27    self.0.fmt(fmt)
28  }
29}
bundle_sources/immutable.rs

bundle_sources/
immutable.rs
