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[Chicken-users] Re: hart.egg
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From: |
Graham Fawcett |
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Subject: |
[Chicken-users] Re: hart.egg |
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Date: |
Mon, 5 Mar 2007 19:08:38 -0500 |
Hi Hans, I had a bit of time tonight, so I've checked an updated Hart
into SVN. (Can anyone please tell me how to get a new egg built?)
On 3/5/07, Hans Bulfone <address@hidden> wrote:
- when using the compiler, (use hart) is not enough to make the
extension available because most of the functions in
hart-support are needed at macro-expansion time.
(actually it seems only html-escape and vector-for-each* are
needed at runtime, the rest at compile-time)
I ended up just adding (use hart-support) into hart.scm. This seems to
address the problem in the interpreter and compiler both.
- i'm a little concerned about possible name-clashes because
you are using short names like parse, emit and for.
perhaps you could do something like:
(declare (export hart-parse hart-html-escape hart-vector-for-each*))
Good point. I've renamed almost all of the functions to hart-* and
added an appropriate (declare (export ...)).
also, i'd probably consider defining for as a function and
calling it in parse-keyword-form instead of expanding to
the (for ...) form, but then you'd have to use some other
looping construct in emit-tag.
I've kept the (for) macro but renamed it to (hart-for) instead. The
hart keyword is still (for: ...) which makes sense. This should
prevent collisions.
- i'd like hart (and therefore probably parse / hart-parse) to take multiple
hart forms so i can do this:
(hart
(raw: "<!DOCTYPE html PUBLIC .....\n")
(html
(body
...
Agreed. Coming soon. :-) Until then you could do:
(hart (let: () (raw: "<!DOCTYPE...") (html ...)))
- imho a (scheme: ...) hart-form would be nice, that causes the
given scheme form to be evaluated and the result discarded,
so i can do this:
(hart
(some-big-html-page ...)
(for: (contact contacts)
(scheme: (print-contact-as-html contact))))
(define (print-contact-as-html contact)
(hart
... contact html ...))
Great point! I've added (scheme: ...).
- the documentation on
http://www.call-with-current-continuation.org/eggs/hart.html
is incorrectly formatted, the <enscript> tags in the examples do not
work correctly, they seem to be outputted as-is.
Oh, I see. I originally added the documentation via the wiki, where it
looks fine; I'm not sure what happened when it got transmogrified over
into call-cc.org/eggs. Either way, I have a lot of
documentation-updating to do now :-) so I'll fix it when I'm there.
i think that's all for now :)
Keep it coming, Hans! I've really enjoyed using Hart myself, and I'm
glad to know that someone else is enjoying it too. Your suggestions
have been first-rate.
Cheers,
Graham