Proposal: Don't require users to use undefined

Bas van Dijk v.dijk.bas at
Wed Oct 27 03:01:21 EDT 2010

On Wed, Oct 27, 2010 at 7:57 AM, Michael Snoyman <michael at> wrote:
> On Wed, Oct 27, 2010 at 7:51 AM, Bas van Dijk <v.dijk.bas at> wrote:
>> On Tue, Oct 26, 2010 at 9:09 PM, Henning Thielemann
>> <lemming at> wrote:
>>> 4. In the future you may deprecate the immediate use of 'sizeOf' and
>>> 'alignment'.
>> We could deprecate sizeOf immediately in favor of sizeOfTagged.
>> Deprecating it doesn't break any code but does gives warnings so that
>> users are encouraged to upgrade. I don't see a reason to wait.
> We can't immediately switch to using sizeOfTagged since many people
> will still be using old versions of base. If we waited one cycle to
> deprecate the old functions, it won't annoy people. By the next cycle,
> in theory a majority of people will already have sizeOfTagged, and it
> would be feasible to switch our code to sizeOf.

Yes, that's what I meant. We should {-# DEPRECATE #-} sizeOf now and
provide sizeOfTagged as an alternative. In a further cycle we can
remove sizeOf.

More information about the Libraries mailing list