001/*
002 * Copyright 2010-2013 JetBrains s.r.o.
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 * http://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 */
016
017package org.jetbrains.jet.lang.resolve.scopes.receivers;
018
019import org.jetbrains.annotations.NotNull;
020import org.jetbrains.jet.lang.types.JetType;
021
022public interface ReceiverValue {
023
024    ReceiverValue NO_RECEIVER = new ReceiverValue() {
025        @NotNull
026        @Override
027        public JetType getType() {
028            throw new UnsupportedOperationException("NO_RECEIVER.getType()");
029        }
030
031        @Override
032        public boolean exists() {
033            return false;
034        }
035
036        @Override
037        public <R, D> R accept(@NotNull ReceiverValueVisitor<R, D> visitor, D data) {
038            return visitor.visitNoReceiver(this, data);
039        }
040
041        @Override
042        public String toString() {
043            return "NO_RECEIVER";
044        }
045    };
046
047    @NotNull
048    JetType getType();
049
050    boolean exists();
051
052    <R, D> R accept(@NotNull ReceiverValueVisitor<R, D> visitor, D data);
053}