[Haskell-cafe] Re: View patterns

[Achim Schneider]

Andrew Coppin <andrewcoppin at btinternet.com> wrote:

> Ozgur Akgun wrote:
> > A humble suggestion: Have a *lazy* "to list" method for
> > your /lists, arrays, sets, etc./ and use the nice list-only version.
> 
> Yeah, that works quite nicely.
> 
> It won't work for arbitrarily complex structures, however. My main
> point was that if you make the constructors abstract and provide
> functions to query the structure, now you can't pattern match against
> it.
>
http://hackage.haskell.org/trac/ghc/ticket/3583

...I think the issue just has to be nailed down precisely, and then
someone has to volunteer implementing it.

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