[Haskell-cafe] Decoupling type classes (e.g. Applicative)?

[Brandon S Allbery KF8NH]

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On 10/29/10 09:35 , Dominique Devriese wrote:
> * Only introduce a dependency from type class A to type class B if all
>   functions in type class B can be implemented in terms of the
>   functions in type class A or if type class A is empty.

Er?  Eq a => Ord a makes perfect sense in context but violates this law.

- -- 
brandon s. allbery     [linux,solaris,freebsd,perl]      allbery at kf8nh.com
system administrator  [openafs,heimdal,too many hats]  allbery at ece.cmu.edu
electrical and computer engineering, carnegie mellon university      KF8NH
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