[tex-k] TeX erranously expands tokens from a token variable

Wolfgang Helbig helbig at mailbox.org
Mon Aug 9 11:20:39 CEST 2021

Dear Karl,

thank you for the explanation! Again!

> In the \good case, \the\toks0 number is terminated by the space (as you
> know, I'm sure). -k
I knew , that it is wise to put a space after a numeric constant, but I 
didn't know that TeX might expand the next token. I should have 
remembered  A208, line 12. Now I know (again).

But in an expanded definition, TeX must not expand any tokens that are 
produced by \the. (A216 line 3). The exception from this rule should be 
told to the gentle reader somewhere. I'd suggest to mention that TeX 
will expand all tokens of \toks2 if the space after \toks0 is missing. 
(A330, line -10).


Wolfgang Helbig
Stauferstr. 22
71334 Waiblingen
07151-920 227

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