On 1/11/07, minh thu <[EMAIL PROTECTED]> 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 cheers, felix _______________________________________________ Chicken-users mailing list [email protected] http://lists.nongnu.org/mailman/listinfo/chicken-users
