I disagree completely. The fitness function is clear, and that fact that many children will produce invalid code is not that much of a problem, really. You just

I disagree completely. The fitness function is clear, and that fact that many children will produce invalid code is not that much of a problem, really. You just eliminate them. Google "automatic programming" if you think it's never been done, your mind is about to be expanded. You should really learn to think for a while before you dismiss ideas as "nonsensical".