[Haskell-cafe] Transactional in-memory model

[Jake Luck]

> I want the API to allow making changes only to the model and then applying
> them back to the filesystem at once. This is to support UI where the user
> will make various changes and then hit "Apply" or "Cancel".
> I am imagining this as a sort of simple transactional behaviour of the
> in-memory model.

Vlcak, would the STM constructs in GHC 6.4 be suitable for your project? 
jake