Am 21.03.2013 um 20:58 schrieb Lars Huttar <lars_hut...@sil.org>: > Hello, > > I reported a Missing Number error back in December (thread at > http://www.ntg.nl/pipermail/ntg-context/2012/070471.html) but got > sidetracked on another issue before finding a resolution. > Now I'm back to the Missing Number error, and I have a short example > that reproduces it: > > \define\largefontsize{13pt} > > % Works fine: \definefont[SerifL][Arial at 13pt] > % Leads to error: > \definefont[SerifL][Arial at \largefontsize] > > % "Missing number, treated as zero" error thrown on the following line: > \starttext \SerifL{Hello} \stoptext > > Note that the SerifL font definition works fine (no error) if I > hard-code in "13pt" instead of using an intervening \largefontsize > definition. But if I hard-code the point size, it would hamper the > modularity of our font configuration and the use of modes in which > different size fonts are used. > > Maybe \define is just the wrong command to use when creating an > identifier for a specified dimension? > I tried changing it to \def and the error went away! > > I looked up the documentation of \define > (http://wiki.contextgarden.net/Command/define) and \def, and couldn't > find any obvious difference, except that \def is TeX and \define is > ConTeXt. The wiki page I just linked to mentions differences between > MkII and MkIV, but this error occurs in both (in XeTeX and LuaTeX). > > Can someone help me understand why I should not use \define for this > case? (Or in general, when I should not use \define?) Or does the > problem lie somewhere else?
Commands created with \define aren’t expandable, i.e. when the content of \definefont is passed to Lua \largefontsize remains a TeX macro and isn’t converted to the dimension. To get a expandable macro use \defineexpandable to create \largefontsize (untested). Wolfgang ___________________________________________________________________________________ If your question is of interest to others as well, please add an entry to the Wiki! maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context webpage : http://www.pragma-ade.nl / http://tex.aanhet.net archive : http://foundry.supelec.fr/projects/contextrev/ wiki : http://contextgarden.net ___________________________________________________________________________________
