On Mon, Sep 8, 2008 at 9:32 AM, Joseph Wright
<[log in to unmask]> wrote:
> Another quesition, I'm afraid.  In the main, I get the impression :w
> macros should be avoided if there is an equivalent :c or :n one.
> However, although there is \chk_exist_cs:c, the is no mention of \cs:c
> (= \@nameuse).  I'd have thought this would be a good idea, or is there
> a reason for avoiding this?

There is \cs_use:c (in l3basics I believe).