Sorry for resurecting an old thread - I try to keep http://hackage.haskell.org/package/quickcheck-instances up to date with orphan QuickCheck instances for types in the Haskell Platform. Since it has gobs of orphan instances it's not really suitable for use as a library or tool dependency. Although if you're using automated tools to keep your test-suites passing, it might be hard to keep the dependencies in the 'quickcheck-instances' up-to-date so your test-suite can build. In summary - I'm not sure its a sustainable model, but I'm giving it a try. On Fri, Mar 22, 2013 at 6:31 PM, Johan Tibell wrote:

On Fri, Mar 22, 2013 at 4:11 PM, Henning Thielemann wrote:

...

It seems like the 'containers' package uses QuickCheck for testing, but does not export an Arbitrary Data.Map instance. Is this intended?

We don't want the container package to depend on QuickCheck (except for the test-suite section) so, yes.

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