Re: [Haskell-cafe] Existential problem

Am Donnerstag, 31. März 2005 15:30 schrieb Pierre Barbier de Reuille: > Just to be able to understand this small thread, does someone have any > pointer explaining (with examples ?) what exactly is this "forall" > extension to haskell ? > > Thanks, The GHC user's guide, section 7.4 says something

Re: [Haskell-cafe] New user, pardon what may be a dumb question

On Mar 31, 2005 7:56 PM, Mark Goldman <[EMAIL PROTECTED]> wrote: > I am using ghci to learn Haskell. My question is it possible to > assign an object that contains state (for lack of knowing the proper > terminology) so a variable or some such from the interactive prompt. > > More concretely I wo

[Haskell-cafe] New user, pardon what may be a dumb question

I am using ghci to learn Haskell. My question is it possible to assign an object that contains state (for lack of knowing the proper terminology) so a variable or some such from the interactive prompt. More concretely I would like to do something like this non-working code snippet: System.Random

Re: [Haskell-cafe] A few questions on using Cabal

Niklas Broberg <[EMAIL PROTECTED]> writes: > I've just started experimenting with the new Cabal system, and I must > say it's really sweet. Thanks a lot to all involved! Yay! > After trying it on some simple tasks I have collected a few questions: > > * What about 'setup uninstall'? Surely there

Re: [Haskell-cafe] Existential problem

Just to be able to understand this small thread, does someone have any pointer explaining (with examples ?) what exactly is this "forall" extension to haskell ? Thanks, -- Pierre Barbier de Reuille INRA - UMR Cirad/Inra/Cnrs/Univ.MontpellierII AMAP Botanique et Bio-informatique de l'Architecture

Re: [Haskell-cafe] Existential problem

> > -- Explicitly recursive continuation type > > data C t a = forall t2 . C (C t2 a -> IO t a) > > If you write > > data C t a = C (forall t2 . C t2 a -> IO' t a), > > it will compile (versions 6.2.2, 6.4). Whether that'll do exactly what you > want, I don't know :-( Actually, I think it does.

[Haskell-cafe] A few questions on using Cabal

I've just started experimenting with the new Cabal system, and I must say it's really sweet. Thanks a lot to all involved! After trying it on some simple tasks I have collected a few questions: * What about 'setup uninstall'? Surely there should be an automatic way of uninstalling packages and ex