[cocci] Checking parse errors for command-line semantic matches

Hello,

I would like to pass some expressions for the functionality “Command-Line Semantic Match”.
https://gitlab.inria.fr/coccinelle/coccinelle/-/blob/e6f8731b851f5d76d2731a9d546dc4f0b181526e/docs/manual/cocci_syntax.tex#L1920-1957

Questionable test result (according to the software combination “Coccinelle 1.3.0”):
Markus_Elfring@Sonne:…/Projekte/Coccinelle/Probe> /usr/bin/spatch --parse-cocci --sp '- EINVAL'
…
minus: parse error: 
  File "/tmp/sp-31268-2224d9.cocci", line 4, column 4, charpos = 31
  around = 'EINVAL',
  whole content = * - EINVAL


Under which circumstances will such data processing become better supported?

Regards,
Markus