On Wed, May 07, 2014 at 07:30:03AM +1000, Edward Kmett wrote:
It may make the code in transformers a bit more confusing for a handful of instances, but this is breaking almost every user I've talked to.
My concern is not the implementation, it's the interface.
This is proving to be a major breaking change as users commonly import StateT (..) and go off and use runStateT, etc.
I wrote the imports in mtl 2.2 in such a way that if you recanted and chose to switch back to the old style, it'd still work.
I just know that I personally have 200+ modules to change as a result, for no better experience as a user.
I'm convinced that this change is the right thing to do, but I haven't managed it at all well. So I'll do a minor release re-instating the fields in short order, but still intend to remove them in the next major release (with more preparation).