depthcharge was: Ignoring pdftex primitives

[Taco Hoekwater]

Robert Howlett wrote:
> But when vrule or hrule is followed by noexpand, as with
> \vrule \noexpand\noexpand ...,
> TeX effectively discards the first noexpand after looking unsuccessfully
> for "width", so that it has fewer noexpands in front of it when it
> goes on to look for "height". I don't see anything on p282 or
> elsewhere in the TeXBook that indicates a lack of symmetry
> in the syntax relating to the keywords "width", "height" and "depth",
> and so I still contend that TeX's different behaviour with
> the two constructions
> xxx \vrule \noexpand\empty width xxx
> and
> xxx \vrule \noexpand\empty height xxx
> is a bug.
 
I agree (even if it was documented in the TeXbook, it would still be a
bug)
 
Taco