On 23/04/2015 14:07, David Carlisle wrote: > Last year I asked about the possibility of adding \Uchar copied from luatex. > > http://tug.org/pipermail/xetex/2014-May/025260.html > > Bruno suggested a possible implementation, and I finally got round to > trying that > adjusted for the sources as in the texlive 2015 pretest tree (diff attached) > > This seems to work fine for characters below "FFFF > but fails for non BMP characters above that. > > See the attached xetexuchar.tex file and the log produced by > luatex and (patched) xetex. > > It just uses the same print_char routine as \string so I thought I'd test > that. > See the file nonbmp.tex (which can be used with a non-patched xetex) > > As can be seen with the attached logs this works with luatex with > \string on U+1D538 producing a single character, but with xetex it produces > two (presumably the UTF-16 surrogate pair, although I didn't check that). > > Is my reading of this file correct and \string and meaning are turning > U+1D538 into two characters, and if so does anyone have a suggestion > of the best place this should be attacked in the source? > > > David
Obviously the non-BMP issue needs to be tackled, but I wonder if \Uchar could be added in any case. It would bring functionality in this area closer to LuaTeX and presumably the high chars business can be viewed as a separate issue. -- Joseph Wright -------------------------------------------------- Subscriptions, Archive, and List information, etc.: http://tug.org/mailman/listinfo/xetex