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.config;
  
  /** Styles of character literal.
   *
   * @see Lex#charLiteralStyles */
  public enum CharLiteralStyle {
    /** Standard character literal. Enclosed in single quotes, using single quotes
     * to escape. Example: {@code 'Won''t'}. */
    STANDARD,
    /** Single-quoted character literal with backslash escapes, as in BigQuery.
     * Example: {@code 'Won\'t'}. */
    BQ_SINGLE,
    /** Double-quoted character literal with backslash escapes, as in BigQuery.
     * Example: {@code "Won\'t"}. */
    BQ_DOUBLE
  }
  