-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On 1/30/11 05:54 , John Meacham wrote: >> instance Num Wrapped where >> (+) = lift2 (+) >> (-) = lift2 (-) >> (*) = lift2 (*) >> abs = lift abs >> signum = lift signum >> fromInteger = Wrapped >> where >> lift2 f (Wrapped a) (Wrapped b) = Wrapped (f a b) >> lift f (Wrapped a) = Wrapped (f a) > > so 'where' indroduces the local instance scope.
The double "where" strikes me as a bit odd. Also, not sure how the parser would deal with it, even given that using the second without the first is entirely pointless; Haskell structures all follow a similar pattern WRT where, and this confounds it in several ways. - -- brandon s. allbery [linux,solaris,freebsd,perl] allb...@kf8nh.com system administrator [openafs,heimdal,too many hats] allb...@ece.cmu.edu electrical and computer engineering, carnegie mellon university KF8NH -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.11 (Darwin) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iEYEARECAAYFAk1F8qgACgkQIn7hlCsL25UDmQCg0iyxts0dSvbhqdDosK0WKF/w CxkAnR5uxzTSYTmK4nvypRcIOtpxTDCm =Z8+V -----END PGP SIGNATURE----- _______________________________________________ Haskell-prime mailing list Haskell-prime@haskell.org http://www.haskell.org/mailman/listinfo/haskell-prime
