#1952: Max and Min for Monoid
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Reporter: conal | Owner:
Type: proposal | Status: new
Priority: normal | Milestone:
Component: libraries/base | Version: 6.8.1
Severity: normal | Resolution:
Keywords: | Difficulty: Easy (1 hr)
Testcase: | Architecture: Unknown
Os: Unknown |
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Comment (by conal):
Oops -- editing error. The Min instance should use maxBound:
{{{
instance (Ord a, Bounded a) => Monoid (Min a) where
mempty = Min maxBound
Min a `mappend` Min b = Min (a `min` b)
}}}
Thanks, Ian.
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/1952#comment:1>
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