[Haskell-cafe] Inheritance and Wrappers

[Brandon S Allbery KF8NH]

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On 1/31/11 15:24 , Daniel Fischer wrote:
> want. You could then also enable OverlappingInstances, which would allow 
> you to write other instances, but that extension is widely regarded as 
> dangerous (have to confess, I forgot what the dangers were, one was that 
> instance selection doesn't always do what you want/expect).

Instance selection will still not look at the context, so multiple instances
would complain about needing IncoherentInstances, and if you add *that* then
it does something like taking the first matching instance it finds (again,
ignoring the context completely).

- -- 
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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