bug#13422: 24.2.91; Feature request: Add a macro always expanding to nil

[Michael Heerdegen]

Stefan Monnier <monnier@iro.umontreal.ca> writes:

> Of course, it also has its down sides:
>
> - returns nil, so (if foo (discard bar) then) runs the `then' in the
>   `else' branch.
>
> - only works at those syntactic places where an expression is expected
>   (e.g. (let ((a 1) (discard exp1 exp2) (b 2)) blabla) doesn't work.

Indeed, you must keep this in mind.  It might be confusing.

> In any case, I think the current comments are good enough, and save the
> programmer from having to choose which kind of comment to use.

Ok, so please close.


Thanks,

Michael.