isHomogeneous static method

bool isHomogeneous(TreeElement a, TreeElement b)

Whether a and b have the same (non-repeat) structure.

Port of FormInstance.isHomogeneous.

Implementation

static bool isHomogeneous(TreeElement a, TreeElement b) {
  if (a.isLeaf && b.isLeaf) return true;
  if (!a.isChildable || !b.isChildable) return false;
  for (final (n1, n2) in [(a, b), (b, a)]) {
    for (final child1 in n1.children) {
      if (child1.isRepeatable) continue;
      final child2 = n2.getChild(child1.name!, 0);
      if (child2 == null) return false;
      if (child2.isRepeatable) throw StateError("shouldn't happen");
    }
  }
  for (final childA in a.children) {
    if (childA.isRepeatable) continue;
    if (!isHomogeneous(childA, b.getChild(childA.name!, 0)!)) return false;
  }
  return true;
}