Re: [Haskell-cafe] a minor bug (memory leak) in ListLike package

On 24 August 2011 11:10, bob zhang wrote:

Hi, John, there is a space leak problem in ListLike typeclass, in the method genericLength calclen !accum cl = calclen accum cl =

I _think_ this may cause problems with some data types (e.g. http://hackage.haskell.org/packages/archive/numbers/2009.8.9/doc/html/Data-N... ) that require the extra laziness (that is, you can do things like ` 3 < genericLength [1..] ' and have it return True).

--- thank you for your nice library btw, is there any way to derive ListLike interface automatically? for such type : newtype List a = List {[a]}

GeneralizedNewtypeDeriving can do that. -- Ivan Lazar Miljenovic Ivan.Miljenovic@gmail.com IvanMiljenovic.wordpress.com