On Tue 30 Nov 2010 20:56, Peter TB Brett <pe...@peter-b.co.uk> writes:
> - An easily re-usable/embeddable and well-documented REPL, to aid
> developers in implementing a "Scheme Interaction Window" or similar
> in their apps.
This is surprisingly difficult to do. A traditional REPL is the bottom
of the main loop of an application (though "application" might be
stretching it); integrating it with other main loops is tricky.
Essentially you need threads. Either pthreads, which bring their own
issues ("what thread is calling my app??? I thought i didn't use
threads?"), coroutines (but since `read' is implemented in C, delimited
continuations that involve the readers are not resumable), or simulated
threads (for example, the gtk repl in guile-gnome that runs recursive
main loops inside soft port readers).
Dunno. Perhaps there are other interfaces that are less repl-like, but
still useful. Suggestions and patches are welcome :-)
> - An high-level API for passing strings for evaluation, that reports
> back the results or error information in a way that's easy to deal
> with from C.
What would this API look like?
Andy
--
http://wingolog.org/
