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

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 :

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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