SchemeAndExpressionImpl.java

/**
 * Copyright 2004-2016 Riccardo Solmi. All rights reserved.
 * This file is part of the Whole Platform.
 *
 * The Whole Platform is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * The Whole Platform 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 Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with the Whole Platform. If not, see <http://www.gnu.org/licenses/>.
 */
package scheme.old;


import java.util.List;
import java.util.Iterator;


class SchemeAndExpressionImpl implements SchemeExpression {
    public SchemeAndExpressionImpl(List es)
    {
	exprs = es;
    }

    public SchemeValue evaluate(SchemeEnvironment env) throws SchemeException
    {
	boolean res = true;
	final Iterator i = exprs.iterator();
	while (i.hasNext())
	    {
		final SchemeExpression expr = (SchemeExpression) i.next();
		res = res && expr.evaluate(env).asBool();
	    }
	return SchemeBoolValueImpl.valueOf(res);
    }

    private final List exprs;
}