Is there any suitable way to generate a [jpg, png etc.] syntax diagram(and/or AST) directly from Scala Parser Combinators?

The only ways I am aware of, aren't "direct":

• converting to ANTLR format and using its own visualizer
• VISUALLANGLAB, which it seems to require an entire mouse-clicks "rewrite"
• implementing a converter by myself (which would be funny, but time-consuming)
• second link below

Related:

• comparison
• wrapper
• a 3rd party attempt

The second link suggests to debug adding an implicitly method to the parsers:

implicit def toLogged(name:String) = new { 
  def !!![T](p:Parser[T]) = log(p)(name)
}

May be an AST would be more feasible/usefull; but the question remains similar.