1 /*

     2  * Copyright (c) 2010, 2013, 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 jdk.nashorn.internal.ir;

    27 

    28 import jdk.nashorn.internal.ir.annotations.Ignore;

    29 import jdk.nashorn.internal.runtime.Source;

    30 

    31 /**

    32  * IR base class for break and continue.

    33  *

    34  */

    35 public abstract class LabeledNode extends Node {

    36     /** Optional label. */

    37     @Ignore

    38     protected final LabelNode labelNode;

    39 

    40     /** Target control node. */

    41     @Ignore

    42     protected final Node targetNode;

    43 

    44     /** Try chain. */

    45     @Ignore

    46     protected final TryNode tryChain;

    47 

    48     /** scope nesting level */

    49     protected int scopeNestingLevel;

    50 

    51     /**

    52      * Constructor

    53      *

    54      * @param source     the source

    55      * @param token      token

    56      * @param finish     finish

    57      * @param labelNode  the label node

    58      * @param targetNode the place to break to

    59      * @param tryChain   the try chain

    60      */

    61     public LabeledNode(final Source source, final long token, final int finish, final LabelNode labelNode, final Node targetNode, final TryNode tryChain) {

    62         super(source, token, finish);

    63 

    64         this.labelNode  = labelNode;

    65         this.targetNode = targetNode;

    66         this.tryChain   = tryChain;

    67     }

    68 

    69     /**

    70      * Copy constructor

    71      *

    72      * @param labeledNode source node

    73      * @param cs          copy state

    74      */

    75     protected LabeledNode(final LabeledNode labeledNode, final CopyState cs) {

    76         super(labeledNode);

    77 

    78         this.labelNode         = (LabelNode)cs.existingOrCopy(labeledNode.labelNode);

    79         this.targetNode        = cs.existingOrSame(labeledNode.targetNode);

    80         this.tryChain          = (TryNode)cs.existingOrSame(labeledNode.tryChain);

    81         this.scopeNestingLevel = labeledNode.scopeNestingLevel;

    82     }

    83 

    84     /**

    85      * Get the label

    86      * @return the label

    87      */

    88     public LabelNode getLabel() {

    89         return labelNode;

    90     }

    91 

    92     /**

    93      * Get the target node

    94      * @return the target node

    95      */

    96     public Node getTargetNode() {

    97         return targetNode;

    98     }

    99 

   100     /**

   101      * Get the surrounding try chain

   102      * @return the try chain

   103      */

   104     public TryNode getTryChain() {

   105         return tryChain;

   106     }

   107 

   108     /**

   109      * Get the scope nesting level

   110      * @return nesting level

   111      */

   112     public int getScopeNestingLevel() {

   113         return scopeNestingLevel;

   114     }

   115 

   116     /**

   117      * Set scope nesting level

   118      * @param level the new level

   119      */

   120     public void setScopeNestingLevel(final int level) {

   121         scopeNestingLevel = level;

   122     }

   123 }