Re : [Chicken-users] various questions

[minh thu]

2007/1/11, felix winkelmann <address@hidden>:
> On 1/10/07, minh thu <address@hidden> wrote:
> > Hi,
> >
> > I've used PRINT, DISPLAY, WRITE, and NEWLINE in a thread created from
> > csi (the actual
> > thread-making function is in a .so). The thread is just a loop waiting
> > one second before the next
> > iteration. Strangely, I tried many times, and some times I have no
> > output but got NEWLINE. Another time I had output. I used FLUSH-OUTPUT
> > but it changed nothing.
>
> Do you run csi in a console window or in emacs? Is this on a UNIX system?

Oh sorry, it is in a console in linux.
I see the (previous) text scrolling because the NEWLINE seems to work
but each line is blank.

> > Is it possible to require-extension on different extensions but each
> > of them having the same exported functions, for example by putting
> > explicitly the extension in a namespace when requiring it ?
>
> No, you would have to use a module system (like provided by
> syntax-case, for example).
I will look at it.

> > Is there support for choosing a version of an extension, for example
> > if the new version deprecates something my application uses ?
>
> No, this is currently not possible.
Ok.

> > Something like mailbox wraps an adt. Is it possible to write it so the
> > user of the extension can choose another adt to be wrapped (without
> > compiling) ?
>
> 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.

Thank you,
thu