Object Oriented

Basic Class

Classes are defined using the 'class' keyword with an 'init' method as the constructor for property initialization.

spec_manifest.jk

class Jack {
    init(name) {
        this.name = name
    }

    func greet() {
        println("Hello", this.name)
    }
}

let jack = Jack("Jack")
jack.greet()

Inheritance

Jackal supports class inheritance using the colon (:) syntax, allowing subclasses to access properties and methods from a parent class.

spec_manifest.jk

class Person {
    init(name) {
        this.name = name
    }
}

class Jack : Person {
    func greet() {
        println("Hello", this.name)
    }
}

let jack = Jack("Jack")
jack.greet()

Interfaces

Interfaces enforce structural contracts. Classes implementing an interface use the '@override' decorator to define the required logic.

spec_manifest.jk

interface Greetable {
    func greet()
}

class Jack implements Greetable {
    @override
    func greet() {
        println("hello jackal")
    }
}

let jack = Jack()
jack.greet()

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