/**
* 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 SchemeLocalExpressionImpl implements SchemeExpression {
public SchemeLocalExpressionImpl(List bs, SchemeExpression b) {
bindings = bs;
body = b;
}
public SchemeValue evaluate(SchemeEnvironment env) throws SchemeException {
final SchemeEnvironment newEnv = env.copy();
final Iterator i = bindings.iterator();
while (i.hasNext()) {
final SchemeDefinition def = (SchemeDefinition) i.next();
def.declare(newEnv);
}
final Iterator j = bindings.iterator();
while (j.hasNext()) {
final SchemeDefinition def = (SchemeDefinition) j.next();
def.define(newEnv);
}
return body.evaluate(newEnv);
}
private final List bindings;
private final SchemeExpression body;
}