1/*
2 * reserved comment block
3 * DO NOT REMOVE OR ALTER!
4 */
5/*
6 * Licensed to the Apache Software Foundation (ASF) under one or more
7 * contributor license agreements.  See the NOTICE file distributed with
8 * this work for additional information regarding copyright ownership.
9 * The ASF licenses this file to You under the Apache License, Version 2.0
10 * (the "License"); you may not use this file except in compliance with
11 * the License.  You may obtain a copy of the License at
12 *
13 *      http://www.apache.org/licenses/LICENSE-2.0
14 *
15 * Unless required by applicable law or agreed to in writing, software
16 * distributed under the License is distributed on an "AS IS" BASIS,
17 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
18 * See the License for the specific language governing permissions and
19 * limitations under the License.
20 */
21
22package com.sun.org.apache.bcel.internal.generic;
23
24
25/**
26 * Super class for stack operations like DUP and POP.
27 *
28 * @author  <A HREF="mailto:markus.dahm@berlin.de">M. Dahm</A>
29 */
30public abstract class StackInstruction extends Instruction {
31  /**
32   * Empty constructor needed for the Class.newInstance() statement in
33   * Instruction.readInstruction(). Not to be used otherwise.
34   */
35  StackInstruction() {}
36
37  /**
38   * @param opcode instruction opcode
39   */
40  protected StackInstruction(short opcode) {
41    super(opcode, (short)1);
42  }
43
44  /** @return Type.UNKNOWN
45   */
46  public Type getType(ConstantPoolGen cp) {
47    return Type.UNKNOWN;
48  }
49}
50