clojure.lang.Keyword.intern C# (CSharp) Method

        public static Keyword intern(String nsname)
        {
            return intern(Symbol.intern(nsname));
        }

        static object matchSymbol(string token, string mask)
        {
            Match m = symbolPat.Match(mask);

            if (m.Success)
            {
                string maskNS   = m.Groups[1].Value;
                string maskName = m.Groups[2].Value;
                if (maskNS != null && maskNS.EndsWith(":/") ||
                    maskName.EndsWith(":") ||
                    mask.IndexOf("::", 1) != -1)
                {
                    return(null);
                }

                if (mask.StartsWith("::"))
                {
                    return(null);
                }

                bool isKeyword = mask[0] == ':';

                if (isKeyword)
                {
                    Match m2 = symbolPat.Match(mask.Substring(1));
                    if (!m2.Success)
                    {
                        return(null);
                    }
                    string ns;
                    string name;
                    ExtractNamesUsingMask(token.Substring(1), m2.Groups[1].Value, m2.Groups[2].Value, out ns, out name);
                    return(Keyword.intern(ns, name));
                }
                else
                {
                    string ns;
                    string name;
                    ExtractNamesUsingMask(token, maskNS, maskName, out ns, out name);
                    return(Symbol.intern(ns, name));
                }
            }

            return(null);
        }