!7

abstract sclass Node {
  new LinkedHashSet<Node> children;
  
  toString { ret shortClassName(this) + ": " + toString2(); }
  abstract S toString2();
  
  bool add(Node n) { ret children.add(n); }
}

sclass TextNode > Node {
  S text;
  
  *() {}
  *(S *text) {}
  
  S toString2() { ret quote(text); }
}

sclass TokNode > Node {
  L<S> tok;
  
  *() {}
  *(LS *tok) {}
  
  S toString2() { ret sfu(tok); }
  
  public bool equals(O o) { ret stdEq(this, o, 'tok); }
  public int hashCode() { ret stdHash(this, 'tok); }
}

sclass ObjectNode > Node {
  O obj;
  
  *() {}
  *(O *obj) {}
  
  S toString2() { ret sfu(obj); }
  
  public bool equals(O o) { ret stdEq(this, o, 'obj); }
  public int hashCode() { ret stdHash(this, 'obj); }
}

sclass OpNode > Node {
  S op;
  
  *() {}
  *(S *op) {}
  
  S toString2() { ret op; }
  
  public bool equals(O o) { ret stdEq(this, o, 'op); }
  public int hashCode() { ret stdHash(this, 'op); }
}

p-exp {
  S input = first(mL("Monolog examples"));
  TextNode root = new(input);
  
  processNode_recursive(root, 10);
  
  showFrame(jDynamicTree(root, func(Node n) -> Collection<Node> { n.children }));
}

svoid processNode_recursive(Node n, int depthCounter) {
  if (n == null || depthCounter <= 0) ret;
  processNode(n);
  for (Node child : n.children)
    processNode_recursive(child, depthCounter-1);
}

svoid processNode(Node n) {
  if (n instanceof TextNode) {
    TextNode tn = cast n;
    
    OpNode op = new("javaTokPlusCurly_dontKeep");
    if (n.add(op))
      op.add(TokNode(javaTokPlusCurly_dontKeep(tn.text)));
  }
  
  if (n instanceof TokNode) {
    TokNode tn = cast n;
    if (containsSubList(tn.tok, ll("=", "", ">"))) {
      OpNode op = new("splitAtDoubleArrow");
      if (n.add(op))
        op.add(ObjectNode(splitAtDoubleArrow(tn.tok)));
    }
    
    L<Int> l = indicesOfSubList(tn.tok, ll("&", "", "&"));
    if (nempty(l)) {
      OpNode op = new("split at &&");
      if (n.add(op))
        for (L<S> subTok : splitAroundSubListIndices(tn.tok, l, 3))
          op.add(TokNode(subTok));
    }
  }
  
  if (n instanceof ObjectNode) {
    ObjectNode on = cast n;
    O o = on.obj;
    
    if (o instanceof S)
      n.add(TextNode((S) o));
    
    Collection c;
    if (on.obj instanceof Collection && l((c = (Collection) on.obj)) == 2) {
      OpNode op = new("Split Collection");
      if (n.add(op))
        for (O e : c)
          op.add(ObjectNode(e));
    }
  }
}

Began life as a copy of #1017531