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1   /*
2    * Copyright (c) 1994, 2003, Oracle and/or its affiliates. All rights reserved.
3    * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4    *
5    * This code is free software; you can redistribute it and/or modify it
6    * under the terms of the GNU General Public License version 2 only, as
7    * published by the Free Software Foundation.  Oracle designates this
8    * particular file as subject to the "Classpath" exception as provided
9    * by Oracle in the LICENSE file that accompanied this code.
10   *
11   * This code is distributed in the hope that it will be useful, but WITHOUT
12   * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13   * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
14   * version 2 for more details (a copy is included in the LICENSE file that
15   * accompanied this code).
16   *
17   * You should have received a copy of the GNU General Public License version
18   * 2 along with this work; if not, write to the Free Software Foundation,
19   * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20   *
21   * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22   * or visit www.oracle.com if you need additional information or have any
23   * questions.
24   */
25  
26  package sun.tools.tree;
27  
28  import sun.tools.java.*;
29  import sun.tools.asm.Label;
30  
31  /**
32   * WARNING: The contents of this source file are not part of any
33   * supported API.  Code that depends on them does so at its own risk:
34   * they are subject to change or removal without notice.
35   */
36  class CodeContext extends Context {
37      Label breakLabel;
38      Label contLabel;
39  
40      /**
41       * Create a new nested context, for a block statement
42       */
43      CodeContext(Context ctx, Node node) {
44          super(ctx, node);
45          switch (node.op) {
46            case DO:
47            case WHILE:
48            case FOR:
49            case FINALLY:
50            case SYNCHRONIZED:
51              this.breakLabel = new Label();
52              this.contLabel = new Label();
53              break;
54            case SWITCH:
55            case TRY:
56            case INLINEMETHOD:
57            case INLINENEWINSTANCE:
58              this.breakLabel = new Label();
59              break;
60            default:
61              if ((node instanceof Statement) && (((Statement)node).labels != null)) {
62                  this.breakLabel = new Label();
63              }
64          }
65      }
66  }