range.js

import { Observable } from '../Observable';
export function range(start = 0, count, scheduler) {
    return new Observable(subscriber => {
        if (count === undefined) {
            count = start;
            start = 0;
        }
        let index = 0;
        let current = start;
        if (scheduler) {
            return scheduler.schedule(dispatch, 0, {
                index, count, start, subscriber
            });
        }
        else {
            do {
                if (index++ >= count) {
                    subscriber.complete();
                    break;
                }
                subscriber.next(current++);
                if (subscriber.closed) {
                    break;
                }
            } while (true);
        }
        return undefined;
    });
}
export function dispatch(state) {
    const { start, index, count, subscriber } = state;
    if (index >= count) {
        subscriber.complete();
        return;
    }
    subscriber.next(start);
    if (subscriber.closed) {
        return;
    }
    state.index = index + 1;
    state.start = start + 1;
    this.schedule(state);
}
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