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/*
* Copyright 2016 Miroslav Janíček
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package net.sandius.rembulan.parser.ast;
import net.sandius.rembulan.util.Check;
public class IndexExpr extends LValueExpr {
private final Expr object;
private final Expr key;
public IndexExpr(Attributes attr, Expr object, Expr key) {
super(attr);
this.object = Check.notNull(object);
this.key = Check.notNull(key);
}
public Expr object() {
return object;
}
public Expr key() {
return key;
}
public IndexExpr update(Expr object, Expr key) {
if (this.object.equals(object) && this.key.equals(key)) {
return this;
}
else {
return new IndexExpr(attributes(), object, key);
}
}
@Override
public LValueExpr accept(Transformer tf) {
return tf.transform(this);
}
}