[Haskell-cafe] Finding way around libraries (was parsec reorganization)

Rustom Mody rustompmody at gmail.com
Wed Apr 13 11:42:32 UTC 2016

On Wed, Mar 30, 2016 at 10:06 PM, Joe Hillenbrand <joehillen at gmail.com>

> Parsec isn't as maintained as Megaparsec
> <https://mrkkrp.github.io/megaparsec/>.
> I recommend checking out the tutorials here
> <https://mrkkrp.github.io/megaparsec/tutorials.html>.

So under the advice to use megaparsec instead of parsec, I tried the
examples here:

Got a page full of errors starting:

fpl.hs:42:20: Not in scope: ‘<$>’ …
    Perhaps you meant one of these:

On a hunch I changed
import Control.Applicative (empty)
import Control.Applicative

and then it started working.
I can only expect that if megaparsec's own official tutorials are thus out
of sync with current haskell, then parsec's will be even more so.

Also I find no megaparsec on hoogle/hayoo

So how does one go about handling the dilemma:
  - megaparsec : in development but undocumented on hayoo/hoohle
  - parsec : documented but bitrotten

What/how do haskell pros go about handling such

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