jdk8-mips64-public/nashorn: src/jdk/nashorn/internal/ir/LexicalContextNode.java@544e17632e96

8013913: Removed Source field from all nodes except FunctionNode in order to save footprint
Reviewed-by: jlaskey, attila

     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 package jdk.nashorn.internal.ir;

    27 import jdk.nashorn.internal.ir.visitor.NodeVisitor;

    29 /**

    30  * Superclass for nodes that can be part of the lexical context

    31  * @see LexicalContext

    32  */

    33 public abstract class LexicalContextNode extends Node {

    34     /**

    35      * Constructor

    36      *

    37      * @param token  token

    38      * @param finish finish

    39      */

    40     protected LexicalContextNode(final long token, final int finish) {

    41         super(token, finish);

    42     }

    44     /**

    45      * Copy constructor

    46      *

    47      * @param node source node

    48      */

    49     protected LexicalContextNode(final LexicalContextNode node) {

    50         super(node);

    51     }

    53     /**

    54      * Accept function for the node given a lexical context. It must be prepared

    55      * to replace itself if present in the lexical context

    56      *

    57      * @param lc      lexical context

    58      * @param visitor node visitor

    59      *

    60      * @return new node or same node depending on state change

    61      */

    62     protected abstract Node accept(final LexicalContext lc, final NodeVisitor visitor);

    64     @Override

    65     public Node accept(final NodeVisitor visitor) {

    66         final LexicalContext lc = visitor.getLexicalContext();

    67         lc.push(this);

    68         final LexicalContextNode newNode = (LexicalContextNode)accept(lc, visitor);

    69         return lc.pop(newNode);

    70     }

    72     /**

    73      * Set the symbol and replace in lexical context if applicable

    74      * @param lc     lexical context

    75      * @param symbol symbol

    76      * @return new node if symbol changed

    77      */

    78     @Override

    79     public Node setSymbol(final LexicalContext lc, final Symbol symbol) {

    80         return Node.replaceInLexicalContext(lc, this, (LexicalContextNode)super.setSymbol(null, symbol));

    81     }

    83 }

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