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;
018
019import org.jetbrains.annotations.NotNull;
020import org.jetbrains.jet.lang.descriptors.DeclarationDescriptor;
021
022public interface RedeclarationHandler {
023    RedeclarationHandler DO_NOTHING = new RedeclarationHandler() {
024        @Override
025        public void handleRedeclaration(@NotNull DeclarationDescriptor first, @NotNull DeclarationDescriptor second) {
026        }
027    };
028    RedeclarationHandler THROW_EXCEPTION = new RedeclarationHandler() {
029        @Override
030        public void handleRedeclaration(@NotNull DeclarationDescriptor first, @NotNull DeclarationDescriptor second) {
031            throw new IllegalStateException("Redeclaration: " + first + " and " + second + "(no line info available)");
032        }
033    };
034
035    void handleRedeclaration(@NotNull DeclarationDescriptor first, @NotNull DeclarationDescriptor second);
036}