I'm trying to understand why people with (serious, legitimate)
concerns about BBP didn't come out of the woodwork until RC2. I fear
it's likely that nothing can be done to change this until 7.12 in any
case.
For the record, I'm not a huge fan of the Foldable abstraction myself;
I just don't think now is a good time for that discussion.
On Tue, Jan 27, 2015 at 11:35 AM, Yitzchak Gale
First of all, I am very strongly in favor of Lennart's proposal of slowing down the BBP.
This discussion is now moving in the direction of changes or alternatives to BBP itself. That is a worthwhile discussion, but it's not practical until we first come to a conclusion about Lennart's original proposal. For now, what is on the table is to find a way to swap BBP, exactly as it is now, in or out using some simple mechanism like a pragma.
The proposed syntax LANGUAGE Prelude=AlternativePrelude is nice, but the difficulty in finding a Proposal 3 shows that this syntax is not good enough. We need a combined Proposal 1 and Proposal 3 that works something like this:
The base package comes with two versions of each of the affected modules. Something like this:
Prelude.Traditional Prelude.Alternative
Data.List.Traditional Data.List.Alternative
etc.
Then we need some simple mechanism - a LANGUAGE pragma, or whatever - that swaps all at once which of the two sets are re-exported by the standard modules.
-Yitz _______________________________________________ Libraries mailing list Libraries@haskell.org http://www.haskell.org/mailman/listinfo/libraries