[JavaScript] URIにマッチする正規表現

URIにマッチする正規表現が欲しかったので、URLにマッチする真の正規表現 – RFC3986定義のURIの話を参考にさせていただいて、簡略化とリファクタリングをしました。
ホストのipv6addressとipvFutureは長い割りに今のところ使うシーンを思いつかなかったので割愛しました。CoffeeScriptで書いています。

###
 regular expression that matches with URL
 Usage:
   result = string.match(urlRegExp)
   result[0] - URL
   result[1] - scheme
   result[2] - userInfo
   result[3] - host
   result[4] - port
   result[5] - path
   result[6] - query
   result[7] - fragment

 ipLiteral (ipv6address or ipvFuture) is not supported.
 reference: http://swatmac.info/?p=1064
###

pchar = '(?:[-.0-9_a-z~]|%[0-9a-f][0-9a-f]|[!$&-,;=:@])'
pcharNC = '(?:[-.0-9_a-z~]|%[0-9a-f][0-9a-f]|[!$&-,;=@])' # no column
vchar = '(?:[-.0-9_a-z~]|%[0-9a-f][0-9a-f]|[!$&-,;=:@/?])'
vString = "(#{vchar}*)"

scheme = '([a-z][a-z0-9+-.]*)'
userInfo = '((?:[-.0-9_a-z~]|%[0-9a-f][0-9a-f]|[!$&-,:;=])*)'
###
ipv6address =
ipvFutre =
ipLiteral = "\[(?:#{ipv6address}|#{ipvFuture})\]"
###
ipv4address = '(?:(?:\\d|[1-9]\\d|1\\d{2}|2[0-4]\\d|25[0-5])\.(?:\\d|[1-9]\\d|1\\d{2}|2[0-4]\\d|25[0-5])\.(?:\\d|[1-9]\\d|1\\d{2}|2[0-4]\\d|25[0-5])\.(?:\\d|[1-9]\\d|1\\d{2}|2[0-4]\\d|25[0-5]))'
regName = '((?:[-.0-9_a-z~]|%[0-9a-f][0-9a-f]|[!$&-,;=])+)'
# host = "(?:#{ipLiteral}|#{ipv4address}|#{regName})"
host = "(?:#{ipv4address}|#{regName})"
port = '(\\d+)'
authority = "(?:(?:#{userInfo}@)?#{host}(?::#{port})?)"
pathAbempty = "(?:/#{pchar}*)*"
pathAbsolute = "/(?:#{pchar}+/#{pchar}*)?"
pathRootless = "#{pcharNC}+(?:/#{pchar}*)*"
hierPart = "//#{authority}(#{pathAbempty}|#{pathAbsolute}|#{pathRootless})"
query = vString
fragment = vString

urlRegExp = new RegExp "#{scheme}:#{hierPart}(?:\\?#{query})?(?:##{fragment})?", 'i'

console.log 'これは http://foo@hostname:4567/path?query=query#fragment のテストです'.match urlRegExp