ometa JSON {
    root = value:a @spaces? end -> a,

    value = object | array | string | number | boolean,

    object = "{" pair:l ( "," pair:p { p } )*:r "}" -> [l].concat(r).reduce(function (acc, e) {
                if (e) acc[e[0]] = e[1];
                return acc;
            }, {})
        | "{" "}" -> {},

    pair = string:s ":" value:a -> [s, a],

    array = "[" value:l (",", value)*:r "]" -> { r ? [l].concat(r) : [l] }
        | "[" "]" -> [],

    string = "\"" <(~'"' character)*>:s "\"" -> s,

    character = escape | char,

    escape = '\\' (
        '"' | '\'' | '\\' | '/' | 'b' -> '\b' | 'f' -> '\f' | 'n' -> '\n' | 'r' -> '\r' |
        't' -> '\t' | 'u' <digit digit digit digit>:s -> String.charCodeAt(parseInt(s, 16)) | char
    ),

    number = @space? </\+|-/? digit+ ('.' digit+)?>:n -> parseFloat(n),

    boolean = "true" -> true | "false" -> false | "null" -> null,

    spaces = /[ \t\f\r\n\v]+/,

    token = @spaces? /true|false|null|:|"|'|\{|\}|\[|\]|,/:t -> [ t, t ]
}

JSON.parse = function parse(s) {
    return this.matchAll(s, 'root');
};

module.exports = JSON;