Brent Yorgey wrote:
On Mon, Oct 18, 2010 at 04:58:42PM -0500, Jimmy Wylie wrote:
I do have one question though. Do you always have to define your own Applicative instance for GenParser when trying to use the Applicative form? I noticed that both you and also RWH defined your own when explaining this form of Parsec. Is there no standard Parsec.Applicative in the library.
I believe Parsec exports an Applicative instance in version 3.0 and later, but previous versions of Parsec did not include it. After all, the first few versions of Parsec were written before Applicative was invented. =)
That's why have switched to Parsimony[1]. It's a simplified version of Parsec with a proper applicative instance. [1]: http://hackage.haskell.org/package/parsimony Regards, Heinrich Apfelmus -- http://apfelmus.nfshost.com