Jeremy Shaw at
Thu Aug 3 15:02:51 EDT 2006

At Wed, 2 Aug 2006 19:42:45 -0700,
John Meacham wrote:
> does anyone else think this would be useful to provide?

I remember wanting something like that on several occassions in the
past, but I can not remember the exact details.

I think I wanted something like:

data Perhaps a = No | Maybe a | Yes

Or possibly:

data Perhaps n m y = No n | Maybe m | Yes y

But I do not remember what I was trying to do, so I am not sure.


More information about the Libraries mailing list