  TokPipe                  -> "|"
  TokTick                  -> "`"
  TokDot                   -> "."
  TokComma                 -> ","
  TokUnderscore            -> "_"
  TokBackslash             -> "\\"
  TokLowerName qual name   -> printQual qual <> name
  TokUpperName qual name   -> printQual qual <> name
  TokOperator qual sym     -> printQual qual <> sym
  TokSymbolName qual sym   -> printQual qual <> "(" <> sym <> ")"