1 /*
   2  * Copyright (c) 2015, 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 /**
  27  * <p>
  28  * Nashorn parser API provides interfaces to represent ECMAScript source code
  29  * as abstract syntax trees (AST) and Parser to parse ECMAScript source scripts.
  30  * </p>
  31  * <p>
  32  * Using parser API user can write Java code to access parse tree
  33  * representation of ECMAScript source. Script source may be a file,
  34  * a URL or a String. Unless stated otherwise null argument in methods of this
  35  * package result in NullPointerException being thrown.
  36  * </p>
  37  *
  38  * <pre>
  39  * <code>
  40  * import jdk.nashorn.api.tree.*;
  41  * import java.io.File;
  42  *
  43  * // Simple example that prints warning on 'with' statements
  44  * public class Main {
  45  *     public static void main(String[] args) throws Exception {
  46  *         // Create a new parser instance
  47  *         Parser parser = Parser.create();
  48  *         File sourceFile = new File(args[0]);
  49  *
  50  *         // Parse given source File using parse method.
  51  *         // Pass a diagnostic listener to print error messages.
  52  *         CompilationUnitTree cut = parser.parse(sourceFile,
  53  *             (d) -&gt; { System.out.println(d); });
  54  *
  55  *         if (cut != null) {
  56  *             // call Tree.accept method passing a SimpleTreeVisitor
  57  *             cut.accept(new SimpleTreeVisitor&lt;Void, Void&gt;() {
  58  *                 // visit method for 'with' statement
  59  *                 public Void visitWith(WithTree wt, Void v) {
  60  *                     // print warning on 'with' statement
  61  *                     System.out.println("Warning: using 'with' statement!");
  62  *                     return null;
  63  *                 }
  64  *             }, null);
  65  *         }
  66  *     }
  67  * }
  68  * </code>
  69  * </pre>
  70  *
  71  * @since 1.9
  72  */
  73 @jdk.Exported
  74 package jdk.nashorn.api.tree;
  75 
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