Fan.Sys.Type.parameterize C# (CSharp) Method

        public virtual Type parameterize(Map pars)
        {
            if (this == Sys.ListType)
              {
            Type v = (Type)pars.get(FanStr.m_ascii['V']);
            if (v == null) throw ArgErr.make("List.parameterize - V undefined").val;
            return v.toListOf();
              }

              if (this == Sys.MapType)
              {
            Type v = (Type)pars.get(FanStr.m_ascii['V']);
            Type k = (Type)pars.get(FanStr.m_ascii['K']);
            if (v == null) throw ArgErr.make("Map.parameterize - V undefined").val;
            if (k == null) throw ArgErr.make("Map.parameterize - K undefined").val;
            return new MapType(k, v);
              }

              if (this == Sys.FuncType)
              {
            Type r = (Type)pars.get(FanStr.m_ascii['R']);
            if (r == null) throw ArgErr.make("Map.parameterize - R undefined").val;
            ArrayList p = new ArrayList();
            for (int i='A'; i<='H'; ++i)
            {
              Type x = (Type)pars.get(FanStr.m_ascii[i]);
              if (x == null) break;
              p.Add(x);
            }
            return new FuncType((Type[])p.ToArray(System.Type.GetType("Fan.Sys.Type")), r);
              }

              throw UnsupportedErr.make("not generic: " + this).val;
        }