treehouse/static/syntax/haku.json

{
    "patterns": [
        { "regex": ";.*", "is": "comment" },
        { "regex": "\"[^\"]*\"", "is": "string" },
        { "regex": "[0-9]+", "is": "literal" },
        {
            "regex": "\\((fn)\\s*\\(.*?\\)",
            "is": {
                "default": "default",
                "captures": ["keyword1"]
            }
        },
        {
            "regex": "\\(([a-zA-Z0-9+~!@$%^&*=<>+?/.,:\\\\|-]+)",
            "is": {
                "default": "default",
                "captures": ["function"]
            }
        },
        { "regex": "[a-zA-Z0-9+~!@$%^&*=<>+?/.,:\\\\|-]+", "is": "identifier" }
    ],
    "keywords": {
        "def": { "into": "keyword1" },
        "if": { "into": "keyword1" }
    }
}