content: /*
   * Licensed to the Apache Software Foundation (ASF) under one or more
   * contributor license agreements.  See the NOTICE file distributed with
   * this work for additional information regarding copyright ownership.
   * The ASF licenses this file to you 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 org.apache.calcite.sql;
  
  import org.apache.calcite.sql.parser.SqlParserPos;
  
  /** Sub-class should be a Enum and can convert to a {@link SqlLiteral}. */
  public interface Symbolizable {
  
    /**
     * Creates a parse-tree node representing an occurrence of this keyword
     * at a particular position in the parsed text.
     */
    default SqlLiteral symbol(SqlParserPos pos) {
      return SqlLiteral.createSymbol((Enum<?>) this, pos);
    }
  }
  