package ec.gp.syntactic.simplification.logic;

import ec.EvolutionState;
import ec.app.semanticGP.func.logic.Inv;
import ec.app.semanticGP.func.logic.Nand;
import ec.gp.GPNode;
import ec.gp.syntactic.simplification.IRule;
import ec.util.Parameter;

class NandToNotRule implements IRule {

	@Override
	public void setup(EvolutionState state, Parameter base) {
		// TODO Auto-generated method stub

	}

	@Override
	public boolean match(GPNode subtree) {
		if(!(subtree instanceof Nand))
			return false;
		
		return subtree.children[0].rootedTreeEquals(subtree.children[1]);
	}

	@Override
	public GPNode replace(GPNode subtree) {
		assert match(subtree) : "The given tree is not a form of nand(a, a)";
		
		Inv inv = new Inv();
		inv.children = new GPNode[] { subtree.children[0] };
		
		return inv;
	}

}
