testing parse-js from UglifyJS

syntax.json

[
    "toplevel",
    [
        [
            {
                "name": "defun",
                "start": {
                    "type": "name",
                    "value": "answer",
                    "line": 1,
                    "col": 9,
                    "pos": 85,
                    "nlb": false,
                    "comments_before": []
                },
                "end": {
                    "type": "punc",
                    "value": "}",
                    "line": 1,
                    "col": 32,
                    "pos": 108,
                    "nlb": false,
                    "comments_before": []
                }
            },
            "answer",
            [],
            [
                [
                    {
                        "name": "return",
                        "start": {
                            "type": "keyword",
                            "value": "return",
                            "line": 1,
                            "col": 20,
                            "pos": 96,
                            "nlb": false,
                            "comments_before": []
                        },
                        "end": {
                            "type": "punc",
                            "value": ";",
                            "line": 1,
                            "col": 29,
                            "pos": 105,
                            "nlb": false,
                            "comments_before": []
                        }
                    },
                    [
                        {
                            "name": "num",
                            "start": {
                                "type": "num",
                                "value": 42,
                                "line": 1,
                                "col": 27,
                                "pos": 103,
                                "nlb": false,
                                "comments_before": []
                            },
                            "end": {
                                "type": "num",
                                "value": 42,
                                "line": 1,
                                "col": 27,
                                "pos": 103,
                                "nlb": false,
                                "comments_before": []
                            }
                        },
                        42
                    ]
                ]
            ]
        ]
    ]
]

test.js

/* Answer to the Ultimate Question of Life, the Universe, and Everything */
function answer() { return 42;  }