/*
 * Copyright 2003-2020 JetBrains s.r.o.
 *
 * 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 jetbrains.mps.generator.impl.query;

import jetbrains.mps.generator.impl.GenerationFailureException;
import jetbrains.mps.generator.template.LabelKeyQueryContext;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;

/**
 * Query to override input node(s) mapped with a label (for {@code $LABEL$} macro only)
 * @author Artem Tikhomirov
 * @since 2020.3
 */
public interface LabelInputQuery extends Query {
  @Nullable
  Object evaluate(@NotNull LabelKeyQueryContext context) throws GenerationFailureException;
}
