export function *rangeGenerator(max) {
    for (let i = 0; i < max; i++) {
        yield i;
    }
}

function rangeObjectPropertyNext() {
    if (this.value < this.max) {
        return {
            value: this.value++
        }
    }
    return {
        done: true
    }
}

function rangeObjectPropertyIterator() {
    return {
        value: 0,
        max: this.max,
        next: rangeObjectPropertyNext
    };
}

export function rangeObjectProperty(max) {
    return {
        max,
        [Symbol.iterator]: rangeObjectPropertyIterator
    };
}

export function rangeClosure(max) {
    let value = 0;
    return {
        [Symbol.iterator]() {
            return {
                next() {
                    if (value < max) {
                        return {
                            value: value++
                        };
                    }
                    return {
                        done: true
                    };
                }
            };
        }
    };
}