Re : Re : [Chicken-users] various questions

[minh thu]

2007/1/12, Kon Lovett <address@hidden>:
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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.

Thanks for pointing this. I'll try for the moment to stick to somewhat
standard Sheme because I'm fairly noob and don't want to learn another
library (in addition of Scheme and chicken specifics). Probably later
though.

thu