Reversible<T>

A generic wrapper struct that provides reversible editing capabilities for values of type T: Default + Debug + Clone.

Features

• Tracks changes separately from the original data
• Only clones the original data when modifications begin (lazy cloning)
• Optional Serde support for serialization/deserialization (with serde feature)
• Implements AsRef<T> and AsMut<T> for transparent access to the original and changed data.

Design Purpose

This structure is useful for scenarios where you need:

• To track changes separately from original data
• Lazy cloning to avoid unnecessary clones
• Transparent access via AsRef/AsMut
• Optional (de)serialization of only the original state

Example

let mut rev = Reversible::from(4);
assert_eq!(rev.as_mut(), &mut 4);

*rev.as_mut() = 13;
assert_eq!(rev.as_ref(), &4);
assert_eq!(rev.as_mut(), &mut 13);

rev.save();
assert_eq!(rev.as_ref(), &13);

*rev.as_mut() = 4;
assert_eq!(rev.as_ref(), &13);
assert_eq!(rev.as_mut(), &mut 4);

rev.revert();
assert_eq!(rev.as_mut(), &mut 13);