[luatex] problem with slnunicode's find

Patrick Gundlach patrick at gundla.ch
Tue Mar 2 19:09:29 CET 2010

>> What would
>> you suggest the following statement returns?
>> str="aö" unicode.utf8.find(str,"\182")  -- (ö's utf8 values are 195
>> and 182)
> Nil, or even better error out, since the second argument is invalid.

That would break every program that uses unicode.utf8 as a replacement for string, which is meant for. How would you then search for a byte sequence in another byte sequence?

> Do you think 3 is a sensible result?

Yes, and the only sensible result.

And what would you expect in this case:

my_three_numbers = "\97\195\182" unicode.utf8.find(my_three_numbers,"\182")

and in this case:

my_three_numbers = "\97\195\182" string.find(my_three_numbers,"\182")


This discussion is getting ridiculous, and I'll stop here. If you want something that returns utf-8 lengths then please write a wrapper around the find function yourself.


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