[Haskell-cafe] versioning of Haskell packages

[Henning Thielemann]

Rogan Creswick schrieb:

> We *do* still have some trouble maintaining / enforcing the PVP in
> general, and there are a few things that it doesn't cover (I don't
> believe exception behavior is covered, for example, although I'd argue
> that throwing more exceptions than a previous version introduces a
> substantial API change. Anyhow, that's a different rant. ;).

If exceptions would be part of the type, then adding exceptions would
change the API. I would like that very much. We can already have that
behaviour with the existing exception handling packages.