[Dev-luatex] \mathchardef with neg. values

Heiko Oberdiek heiko.oberdiek at googlemail.com
Sat May 21 01:57:21 CEST 2011


Hello,

\catcode`\{=1
\catcode`\}=2
\def\msg{\immediate\write16 }

\mathchardef\foo=-1
\msg{[\the\foo] [\meaning\foo]}

\csname @@end\endcsname\end

Result with different values:

[-1] [\mathchar"000/]
[-2] [\mathchar"000.]
[-3] [\mathchar"000-]
[-16] [\mathchar"00/0]
[-256] [\mathchar"0/00]
...

Similar behaves \omathchardef.

The documentation says, the valid ranges are
\mathchardef: 0--"8000
\omathchardef: 0--"8000000

Thus it's probably a bug that negative values are
accepted.

Yours sincerely
  Heiko Oberdiek


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