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From: "Sergei Egorov" <esl@xxxxxxxxxxxxxxx>
Date: Thu, 30 Sep 1999 15:15:01 -0400
I woud only suggest to read #,(...) as (hash-comma ...) and
(define-syntax hash-comma (syntax-rules () ((_ ?x) (force (delay ?x)))).
This would expose only one name to name capture -related hazards of
read-macro expansion.
Good idea. It would be better to have a name that reflected
the behavior rather than the syntax, just as , is `unquote' and
not `comma'.
It's a pity that this form won't work inside quoted constants,
though...
You can get something close by combining #, with quasiquote.
Just do
#,`(a ,(foo b c) d)
instead of
'(a #,(foo b c) d)
We could have #`x be a shorthand for (force (delay (quasiquote x))),
either instead of or in addition to #, .
-Richard Kelsey