Re: is string.gmatch(), string.upper() 7-bit ascii only?

[Roberto Ierusalimschy <roberto@...>]

> I am trying to manipulate text with umlauts.  string.upper() does not produce upper case version of umlauts like ä,ö,ü etc.
> 
> Also the %g pattern, when used in string.gmatch() does not match these umlauts.
> 
> Is there anything that can be done about it?  Or, am I making a stupid mistake?

  http://www.lua.org/manual/5.3/manual.html#6.4
  [...]
  The string library assumes one-byte character encodings.

If you are using an 8-bit encoding (e.g., LATIN 1), then these should
work, given a proper locale. Otherwise (e.g., UTF-8), you will need an
external library.

-- Roberto