Hello, I have studied a bit the source code of XeTeX and luaTeX. XeTex definesa procedure that is used to insert primitive commands into a hash table.The procedure;s declaration is as follows: procedure primitive(@!s:str_number;@!c:quarterword;@!o:halfword); This is not exactly Pascal but I think one understands what is going on.Now luaTeX inserts the TeX primitives with the following command # define primitive_tex(a,b,c,d) primitive((a),(b),(c),(d),tex_command) where function primitive is declared as follows: extern void primitive(const char *ss, quarterword c, halfword o, halfword off, int cmd_origin); XeTeX uses catcodes to compare commands, while luaTeX has special command codeswhich are different from catcodes. I think this approach is better. However, itis my understanding that the problem that started this thread cannot be solved trivially. A.S.
---------------------- Apostolos Syropoulos Xanthi, Greece
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