> I wonder whether comment blocks would be even more useful
> (if we have to prioritise):
>
> #| this is
> a comment |#
>
> The advantage is that you don't have to have syntactically valid things
> in comment blocks, while #; requires that you do. #; also looks like
> slightly hard to read if you do stuff like
>
> (foo #;(foobar
> ...
> 1)
> zot)
+1 for Common-Lisp block comments.
+1. Let's not stray away from existing solutions.
(And for reader macros, FWIW...)
+2 Yep, just make a programmable reader.
Even without such a thing, reader conditionals are just what's requested here.
João