parser.js revision 1423:c13179703f65 
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.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 */
23
24/**
25 * Parse function returns a JSON object representing ECMAScript code passed.
26 * name is optional name for the code source and location param tells whether to
27 * include location information for AST nodes or not.
28 *
29 * Example:
30 *
31 *    load("nashorn:parser.js");
32 *    try {
33 *        var json = parse("print('hello')");
34 *        print(JSON.stringify(json));
35 *    } catch (e) {
36 *        print(e);
37 *    }
38 */
39function parse(/*code, [name], [location]*/) {
40    var code, name = "<unknown>", location = false;
41    switch (arguments.length) {
42        case 3:
43            location = arguments[2];
44        case 2:
45            name = arguments[1];
46        case 1:
47            code = arguments[0];
48    }
49
50    var jsonStr = Packages.jdk.nashorn.api.scripting.ScriptUtils.parse(code, name, location);
51    return JSON.parse(jsonStr,
52        function (prop, value) {
53            if (typeof(value) == 'string' && prop == "value") {
54                // handle regexps and strings - both are encoded as strings but strings
55                // do not start with '/'. If regexp, then eval it to make RegExp object
56                return value.startsWith('/')? eval(value) : value.substring(1);
57            } else {
58                // anything else is returned "as is"
59                return value;
60            }
61        });
62}
63
64