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Dne 2023-03-24 12:57, Luiz Henrique de Figueiredo napsal:
Is there some C API to check wether given string is a valid identifier?

No. But see the code for "identifier or reserved word" in llex:

It would be really beneficial in some cases.

For instance?

I have lua embedded in system where users can define table of variables and then write expressions to process them. However i think it would be reasonable to have some sanity checks in place, so i don't have to explain why formulas using variable called "TIME-MAX" are not working :-) and stuff like that...

S pozdravem
Best regards
     Tomáš Mudruňka - SPOJE.NET s.r.o.