Hello ConTeXist,
I want to use Lua to write characters (substrings) from a string, but I
get an error message:
! String contains an invalid utf-8 sequence.
I tried various Lua functions for working with UTF8 strings for example:
string.subutf8(string, start[,end])
for i, char in str:nextutf8(orig_pos)
string.lenutf8(string),
but without success.
Can you please someone help?
Thanks
Jaroslav Hajtmar
Here is my minimal example:
\def\mymacro#1{\ctxlua{for i=1, string.len('#1') do
context(string.sub('#1',i,i)..", ") end}}
\starttext
%\mymacro{šěřěžřýčřčžáýčý} % Here is a problem
\mymacro{asdfghjklqwertt} % Here is all OK
\stoptext
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