On 30/04/10 23:52, Felipe Lessa wrote:
On Fri, Apr 30, 2010 at 09:37:39PM +0100, Simon Marlow wrote:
I like the picture where we have a small base, lots of independent packages, and one or more haskell20xx packages that re-exports all the standardised stuff from the other packages. This arrangement extends smoothly, the only problem is that haskell20xx overlaps with the other packages.
I wonder how much pain will there be when Haskell 2011 comes out. Some packages will depend on haskell2010, and others on haskell2011. Will they integrate and compile fine?
If haskell2010 is a metapackage that says
Depends: base == X.Y.*
and haskell2011 is another metapackage that says
Depends: base == Z.W.*
then I think we're going to have big problems. Sorry if this is a resolved issue. :)
That won't be a problem, for the same reasons that we can happily mix packages that depend on base-3 with packages that depend on base-4 right now. That is, unless Haskell 2011 decides to make some incompatible changes to datatypes or classes, as Ian pointed out. Cheers, Simon