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On 16/05/2018 23:57, Karl Berry wrote:
Doing a grep on /usr/local/texlive/2018/texmf-dist/tex/, I see \expanded is used in a couple oberdiek packages, context, and mathspec. I did not try to figure out if the mathspec usage is compatible. It might be worth notifying its author at some point as a courtesy. FWIW ...
[Resending keeping all recipients, and extending a little] Hi Karl, \expanded is a suggestion Heiko made initially, and the code in his packages is looking for it and warning if it's not available (which means in anything other than LuaTeX at present). His code should be fine I think: it works with LuaTeX already. mathspec is I think using \expanded only for convenience: the stuff it's doing isn't expandable and # tokens are unlikely to be an issue. So it should be unaffected by the change here: the new primitive definition will in the use case in mathspec act exactly as the current \providecommand-defined version. If necessary a request can go in for that one case to be altered: the team are experienced at supporting such adjustments in the development of expl3, for example. I see that Will did the last update of mathspec, so there is likely a route to address any issue (as I say, I don't expect there to be one). I see Hans has replied re. ConTeXt: only MkII would be affected in any case (LuaTeX has \expanded, though it's not widely used I think. But the same type of expansion is seen in \directlua ...) Joseph