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1   /*
2    * Copyright (C) 2016 The Guava Authors
3    *
4    * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except
5    * in compliance with the License. You may obtain a copy of the License at
6    *
7    * http://www.apache.org/licenses/LICENSE-2.0
8    *
9    * Unless required by applicable law or agreed to in writing, software distributed under the License
10   * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
11   * or implied. See the License for the specific language governing permissions and limitations under
12   * the License.
13   */
14  
15  package com.google.common.base;
16  
17  import com.google.common.annotations.GwtCompatible;
18  
19  /**
20   * The subset of the {@link java.util.regex.Pattern} API which is used by this package, and also
21   * shared with the {@code re2j} library. For internal use only. Please refer to the {@code Pattern}
22   * javadoc for details.
23   */
24  @GwtCompatible
25  abstract class CommonPattern {
26    abstract CommonMatcher matcher(CharSequence t);
27  
28    abstract String pattern();
29  
30    abstract int flags();
31  
32    // Re-declare these as abstract to force subclasses to override.
33    @Override
34    public abstract String toString();
35  
36    @Override
37    public abstract int hashCode();
38  
39    @Override
40    public abstract boolean equals(Object o);
41  }