pub type DeepImmutable<T> = T;Expand description
DeepImmutable is a TypeScript conditional type that recursively makes all properties readonly. In Rust, immutability is the default, so this type serves as documentation rather than an active constraint.
TypeScript: T extends (…args: never[]) => unknown ? T : T extends readonly (infer U)[] ? ReadonlyArray<DeepImmutable> : T extends object ? { readonly [K in keyof T]: DeepImmutable<T[K]> } : T
In Rust, all values are immutable by default unless marked mut.
For shared ownership of immutable data, use Arc<T>.
For interior mutability patterns, use RefCell<T>, Mutex<T>, or RwLock<T>.
For functions, use Box<dyn Fn(...)> or fn(...) directly.