Wed, 7 Jun 2017 11:21:21 +0100
On 07/06/2017 11:14, Alexander Grahn wrote:
> Good afternoon,
> the recent version change of expl3 from [2017/04/01] (last TL-16 state) to
> [2017/05/13] (initial TL-17 state) changed the behaviour of \hbox_s:Nn, which
> made a hot-fix necessary for one of my packages (ocgx2) on CTAN.
> The problem boils down to the following code, which used to work with expl3 as
> of v. 2017/04/01, but fails now with `! Missing } inserted.' error.
> \hbox_set:Nn0\bgroup CTAN % broken since expl3 [2017/05/13]
> % \setbox0=\hbox\bgroup CTAN % hot-fix
> I would like to return to using \hbox_set:Nn instead of \setbox.
I had an issue in siunitx which I also had to fix for this update: for
me it boiled down to having made some implementation assumptions and
ending up mixing different interfaces. In the above, \hbox_set:Nn is
wrong (even if we ignore using "0" not a box name). For me
\hbox_set:Nw 0 CTAN % broken since expl3 [2017/05/13]
% \setbox0=\hbox\bgroup CTAN % hot-fix
works and is using the appropriate interface.
P.S. I'm meant to be adding \hbox_set_to_wd:Nnw, etc., as those are
currently not covered: will aim to do today/tomorrow.