Thanks, you got me to head in the correct direction. I need to import Prelude twice, once without (++) and once qualified only for the (++) function.
import Prelude hiding ( (++) ) import qualified Prelude ( (++) ) Terry ________________________________ From: Daniel Peebles <pumpkin...@gmail.com> To: Terry Hayes <tdcha...@pacbell.net> Cc: haskell-cafe@haskell.org Sent: Thursday, September 24, 2009 6:02:18 PM Subject: Re: [Haskell-cafe] Referring to Prelude.(++) Did you try (Prelude.++)? I think that's the way it needs to be done. Dan On Thu, Sep 24, 2009 at 8:59 PM, Terry Hayes <tdcha...@pacbell.net> wrote: > I'd like to redefine (++) so that it works on a more general class of > "lists" (ListOf a). To do this, I found that I can import the Prelude > hiding the definition of (++). Then I want to make [] an instance of > ListOf, and have the (++) function call the built-in Prelude.(++). > > My problem is that I can't figure out how to call the built-in function. > Just using "Prelude.(++)" doesn't seem to work in the way that > "Prelude.foldl" would (for example). > > Any ideas? > > Terry > > > _______________________________________________ > Haskell-Cafe mailing list > Haskell-Cafe@haskell.org > http://www.haskell.org/mailman/listinfo/haskell-cafe > >
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