On 7 April 2016 at 16:40, Marc Balmer <marc@msys.ch> wrote:
(Expected is 'ÄÖÜ')
You need an external library which understands all of Unicode. Not advocating anything in particular, just picking a first 'Lua utf8' library that a simple web search returned:
$ sudo luarocks install luautf8 $ lua Lua 5.1.5 Copyright (C) 1994-2012 Lua.org, PUC-Rio > utf8 = require 'lua-utf8' > = utf8.upper('äöü') ÄÖÜ > for m in utf8.gmatch('äöü', '%g+') do print(m) end äöü
