[Haskell-cafe] A very nontrivial parser

[Andrew Coppin]

Jonathan Cast wrote:
> On Sunday 08 July 2007, Andrew Coppin wrote:
>   
>> Jonathan Cast wrote:
>>     
>>> I think surely you're using existential data types rather than rank-2
>>> types.
>>>       
>> You expect *me* to know?
>>     
>
> Surely not :)  That's why I tried briefly explaining the ideas again.
>   

LOL! Thanks...

>> All I know is it didn't compile, so I added {-# LANGUAGE Rank2Types #-},
>> and now it works. *shrugs*
>>     
>
> If  you're happy, then I guess I can accept the situation.  I think you'll 
> trip over the distinction again, but that's just me.
>   

I must admit, the code compiles, but I have not yet attempted to *use* 
it for anything...

(It's the code for supporting 2-pass encoders, and I haven't written any 
yet.)