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!7

sclass BottomUpParser > DynPrintLogWithInput {
  transient S lastOutput;
  
  start {
    dm_useLocallyCopiedMechLists(); set flag NoFancyMechParsing.
    doEvery(5000, r { update(inputChooser.input()) });
  }
  
  void update(fS s) {
    temp enter();
    
    S rendered = hijackPrint(r {
      PTElement root = ai_parseBottomUpToTree(s);
      if (root == null) ret with print("No parse");
      
      PTElement e = root;
      if (e instanceof HaveCategories)
        e = first(e.children); // Choose most likely reconstruction
      if (e instanceof ChoosePart) {
        WeightedProduction prod = e/ChoosePart.reconstruction.production;
        print("Hint: " + prod.simplificationHint);
        if (eq(prod.simplificationHint, "L"))
          print("SIMPLIFIED >> " + e/ChoosePart.a.text());
        else if (eq(prod.simplificationHint, "R"))
          print("SIMPLIFIED >> " + e/ChoosePart.b.text());
      }
    });

    bool shouldPrint = neq(rendered, lastOutput);
    lastOutput = rendered;
    if (shouldPrint) print("\n> " + s + "\n" + rendered);
  }
}