UnusedChecker.java

/*
 * #%~
 * The VDM Type Checker
 * %%
 * Copyright (C) 2008 - 2014 Overture
 * %%
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public
 * License along with this program.  If not, see
 * <http://www.gnu.org/licenses/gpl-3.0.html>.
 * #~%
 */
package org.overture.typechecker.utilities;

import org.overture.ast.analysis.AnalysisAdaptor;
import org.overture.ast.analysis.AnalysisException;
import org.overture.ast.definitions.AEqualsDefinition;
import org.overture.ast.definitions.AMultiBindListDefinition;
import org.overture.ast.definitions.AStateDefinition;
import org.overture.ast.definitions.AValueDefinition;
import org.overture.ast.definitions.PDefinition;
import org.overture.typechecker.assistant.ITypeCheckerAssistantFactory;

/**
 * This class checks if a node is used.
 * 
 * @author kel
 */
public class UnusedChecker extends AnalysisAdaptor
{

	protected ITypeCheckerAssistantFactory af;

	public UnusedChecker(ITypeCheckerAssistantFactory af)
	{
		this.af = af;
	}

	@Override
	public void caseAEqualsDefinition(AEqualsDefinition node)
			throws AnalysisException
	{
		if (node.getDefs() != null)
		{
			af.createPDefinitionListAssistant().unusedCheck(node.getDefs());
		}
	}

	@Override
	public void caseAMultiBindListDefinition(AMultiBindListDefinition node)
			throws AnalysisException
	{
		if (node.getDefs() != null)
		{
			af.createPDefinitionListAssistant().unusedCheck(node.getDefs());
		}
	}

	@Override
	public void caseAStateDefinition(AStateDefinition node)
			throws AnalysisException
	{
		af.createPDefinitionListAssistant().unusedCheck(node.getStateDefs());
	}

	@Override
	public void caseAValueDefinition(AValueDefinition node)
			throws AnalysisException
	{
		if (node.getUsed()) // Indicates all definitions exported (used)
		{
			return;
		}

		if (node.getDefs() != null)
		{
			for (PDefinition def : node.getDefs())
			{
				// PDefinitionAssistantTC.unusedCheck(def);
				def.apply(THIS);
			}
		}

	}

	@Override
	public void defaultPDefinition(PDefinition node) throws AnalysisException
	{
		af.createPDefinitionAssistant().unusedCheckBaseCase(node);
	}

}