propagate function

Implementation

void propagate(Link theLink) {
  Link? link = theLink;
  var next = link.nextSub;
  Stack<Link?>? stack;

  top:
  // allow do-while loop
  // ignore: literal_only_boolean_expressions
  do {
    final sub = link!.sub;
    var flags = sub.flags;

    if (flags &
            (ReactiveFlags.recursedCheck |
                ReactiveFlags.recursed |
                ReactiveFlags.dirty |
                ReactiveFlags.pending) ==
        0) {
      sub.flags = flags | ReactiveFlags.pending;
    } else if (flags & (ReactiveFlags.recursedCheck | ReactiveFlags.recursed) ==
        0) {
      flags = ReactiveFlags.none;
    } else if (flags & (ReactiveFlags.recursedCheck) == 0) {
      sub.flags = (flags & ~ReactiveFlags.recursed) | (ReactiveFlags.pending);
    } else if (flags & (ReactiveFlags.dirty | ReactiveFlags.pending) == 0 &&
        isValidLink(link, sub)) {
      sub.flags = flags | (ReactiveFlags.recursed | ReactiveFlags.pending);
      flags &= ReactiveFlags.mutable;
    } else {
      flags = ReactiveFlags.none;
    }

    if (flags & (ReactiveFlags.watching) != 0) {
      notifyEffect(sub);
    }

    if (flags & (ReactiveFlags.mutable) != 0) {
      final subSubs = sub.subs;
      if (subSubs != null) {
        final nextSub = (link = subSubs).nextSub;
        if (nextSub != null) {
          stack = Stack(value: next, prev: stack);
          next = nextSub;
        }
        continue;
      }
    }

    if ((link = next) != null) {
      next = link!.nextSub;
      continue;
    }

    while (stack != null) {
      link = stack.value;
      stack = stack.prev;
      if (link != null) {
        next = link.nextSub;
        continue top;
      }
    }

    break;
  } while (true);
}