On Feb 2, 2008, at 18:41 , Ben Butler-Cole wrote:
No instance for (Bounded a)
arising from use of `maxBound' at Hbot.hs:6:34-41
(...)
My (clearly flawed) understanding of the signature I've specified
for 'turn' means *exactly* that a is Bounded.
The problem is that the scope of a is the type signature; it does
*not* extend to the definition.
You can try omitting the type on maxBound and minBound, or you can
enable the scoped type variables extension ( http://www.haskell.org/
ghc/docs/latest/html/users_guide/other-type-extensions.html#scoped-
type-variables ).
--
brandon s. allbery [solaris,freebsd,perl,pugs,haskell] [EMAIL PROTECTED]
system administrator [openafs,heimdal,too many hats] [EMAIL PROTECTED]
electrical and computer engineering, carnegie mellon university KF8NH
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