ClosureGenerator.ts

interface ObjectCallable {
    call(...args: any[]): void
}

class ClosurePrintLine implements ObjectCallable {
    private _it: number
    private _step: number

    constructor(step: number = 16) {
        this._it = 0
        this._step = step
    }

    get it(): number {
        return this._it
    }

    get step(): number {
        return this._step
    }

    reset(): void {
        this._it = 0
    }

    call(...args: string[]) {
        for(let arg of args) {
            console.log(arg)
            this._it++
        }
    }
}

/** @noSelf **/
function closureCallableGenerator<T extends ObjectCallable>(obj: T) {
    /** @noSelf **/
    return (...args: any[]) => {
        obj.call(...args)
    }
}

const obj = new ClosurePrintLine()
let closure = closureCallableGenerator(obj)

closure(`Step: ${obj.it}`)
closure(`Step: ${obj.it}`)
closure(`Step: ${obj.it}`)
closure(`Step: ${obj.it}`)

obj.reset()

closure(`Step: ${obj.it}`)
closure(`Step: ${obj.it}`)
closure(`Step: ${obj.it}`)
closure(`Step: ${obj.it}`)