par is:module package:parsec

This module includes everything you need to get started writing a parser. By default this module is set up to parse character data. If you'd like to parse the result of your own tokenizer you should start with the following imports:

import Text.Parsec.Prim
import Text.Parsec.Combinator

Then you can implement your own version of satisfy on top of the tokenPrim primitive.

Parsec compatibility module