Macro rebind

macro_rules! rebind {
    ($($path:ident).*($($arg:expr),+)$($x:tt)?) => { ... };
    ($($path:ident).*($($arg:expr),+).unwrap()) => { ... };
    ($value:expr, $cx:expr) => { ... };
}

Rebinds an object so that it is bound to an immutable borrow of crate::gc::Context instead of a mutable borrow. This can release the mutable borrow and allow Context to be used for other things.

Examples

let object = rebind!(func1(&mut cx));
func2(&mut cx);
let object2 = object;

wthout this macro the above code would not compile because object can’t outlive the call to func2.