Is it possible to implement loosely coupled closures in programming languages?

In iOS (Swift, Objective-C), closures are usually strongly tied to the context in which they are created, capturing variables and objects. However, weakly linked closures can be implemented using weak references (weak) inside the closure to prevent strong retain cycles.

Example in Swift:

class MyClass {
    var value = 10
    func doSomething() {
        let closure: () -> Void = { [weak self] in
            guard let self = self else { return }
            print(self.value)
        }
        closure()
    }
}

Here, self is captured weakly, which helps avoid retaining the MyClass object if it is already deallocated.

Thus, weakly linked closures are possible and widely used for memory management and leak prevention.