stealcell

An Option like type that lets you temporarily remove a value from somewhere to retain mutable access on both.

Example & Usage

cargo run --example stealcell_example

use stealcell::StealCell;

struct Thing {
    value: usize,
}

impl Thing {
    /// A test function that requires mutable access on itself and za warudo
    fn hello_world(&mut self, world: &mut World) {
        println!("hello {}, my value is {}.", world.name, self.value);
    }
}

struct World {
    name: String,
    thing: StealCell<Thing>,
}

fn main() {
    let mut world = World {
        name: "world".to_string(),
        thing: StealCell::new(Thing { value: 1 }),
    };
    let mut stolen_thing = world.thing.steal();
    stolen_thing.hello_world(&mut world);
    // If you skip this and let the stolen value drop, you get a panic!
    world.thing.return_stolen(stolen_thing);
}

For Maintainers

See contributing.md