Haskell report typo (bad law for readsPrec)
Tue, 19 Jun 2001 12:30:59 +0200
Sorry, it hit the wrong button so the following didn't go to the list.
> "Simon Peyton-Jones" wrote
> > | Another simple alternative is to weaken the the equation by
> > | replacing the variable r by the empty string: [Alternative B:]
> > |
> > | ...
> > | should be the case that
> > |
> > | fst (head (readsPrec d (showsPrec d x ""))) == x
> > Yes, I like this alternative too. I'll implement it.
> Why not require
> readsPrec d (showPrec d x "") == [(x,"")]
> in this case? At least it should be
> head (readsPrec d x "") == (x,"")
Wolfgang Lux Phone: +49-251-83-38263
Institut fuer Wirtschaftinformatik FAX: +49-251-83-38259
Universitaet Muenster Email: firstname.lastname@example.org