[Haskell-cafe] Re: Cont, ContT and IO() - Code on hpaste

[Günther Schmidt]

Hi,

I've put the code that I wish to transform from using exceptions to using  
continuations on hpaste:

?http://hpaste.org/fastcgi/hpaste.fcgi/view?id=6515#a6515

thanks

Günther



Am 04.07.2009, 01:11 Uhr, schrieb Günther Schmidt <gue.schmidt at web.de>:

>
> Hi,
>
> I've got an IO action, some file system IO, traversing one level only  
> and iterating over files found. I wish to build in an "early" exit, ie.  
> if an IO action in the loop encounters a particular value I want it to  
> abort the loop.
>
> Now so far, pls don't shoot, I have done this by throwing IO Exceptions  
> and catching them. I'm trying to rewrite this using Continuatios /  
> callCC but can't figure out where to place what.
>
> I certainly don't have the intuition yet and funny enough not even in  
> RWH I could find some Cont/ContT examples.
>
> Would someone please draw me an example?
>
> Günther



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