The trick is to use the `parsers` library, which lets you switch out parsing backends. You can prototype with the `trifecta` library (which has good error mess

The trick is to use the `parsers` library, which lets you switch out parsing backends. You can prototype with the `trifecta` library (which has good error messages) and then switch to `attoparsec` when you're done For this specific post, the main thing I do is ignore the error messages and just look at where parsing fails by retrieving the leftovers when it fails (using the lower-level `parse` function). Usually that gave me enough of a clue to figure out what was going wrong.