Re: Re : [Chicken-users] various questions

[Kon Lovett]

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On Jan 12, 2007, at 12:31 AM, felix winkelmann wrote:

> On 1/11/07, minh thu <address@hidden> wrote:
> > >
> > > Could you elaborate on this? Do you want to let the user specify  
> > the
> > > actual record type, or it's contents?
> > The record type.
> > Say mailbox use a list-based queue implementation (so 'mailbox' in  
> > the
> > following sentences is a hypothetical one).
> > Could I provide another implementation of a queue to be used by  
> > mailbox?
> > Or could the author of mailbox make it possible by providing  
> > different
> > implementations ?
> > I don't know module systems but maybe my question is wheter we can
> > parametrize a module when loading (instanciating ?) it.
>
> Well, this is what is called "functors" in SML, for example:  
> parameterized
> modules. You provide a module implementing the operations on
> a specific datatype and pass this module to your mailbox module.
> A (very basic) implementation of such functors is in the "lexmod" egg:
>
> http://chicken.wiki.br/lexmod

The 'levenshtein' egg has a generic algorithm, it works w/ strings or  
vectors. It uses the facilities of 'procedure-surface' to provide the  
appropriate procedures.

> cheers,
> felix
>
>
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> Chicken-users mailing list
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> http://lists.nongnu.org/mailman/listinfo/chicken-users

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