[Haskell-cafe] instance Binary UTCTime (Was: Oprhan instances)

Duncan Coutts duncan.coutts at googlemail.com
Sun Nov 29 08:37:55 EST 2009

On Thu, 2009-11-26 at 16:40 -0500, David Menendez wrote:

> The problem with this solution is that it doesn't scale. If we have M
> packages providing types and N packages providing classes, then we
> need M*N additional packages for orphans.
> The best long-term solution is probably extending Cabal to handle this
> more transparently, perhaps by allowing packages to depend on flagged
> versions of other packages (e.g., foomonad >= 4.0 && < 4.1 && HAS_MTL)

Not going to happen. Such packages could not be translated into binary
distro packages.


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