Zdenek Wagner wrote: > Not all control sequences but primitives.
Again, I would respectfully suggest that Knuth's own words are the best guidance here : > *\**if *<token1> <token2> > > TeX will expand macros following *\if* until two unexpandable tokens are > found. If either token is a control sequence, TeX considers it to have > character code 256 and category code 16, unless the current equivalent of > that control sequence has been *\let* equal to a non-active character token > ... > > *\**ifcat *<token1> <token2> > > This is just like *\if*, but it tests the category code, not the character > code ... Philip Taylor -------------------------------------------------- Subscriptions, Archive, and List information, etc.: http://tug.org/mailman/listinfo/xetex
