[NTG-context] Strings [[...]] inside \startluacode \stopluacode

26 Apr 2010

      Hello.

I am experimenting with courious things in LuaTeX (combining TeX and Lua 
codes) and I have a problem with lua strings containing TeX definitions.

When string (containing definition of TeX macro with \directlua call-in) 
is creating in the separate lua file (reading by command dofile) then 
script does work OK, but when string is inside \startluacode 
\stopluacode environment, then does work only when
i use text string inside ' ' for example:
luastring='\\def\\texmacro\#1\{\\directlua\{luafunction(\#1)\}\}'

Script does not work when i use text inside [[ ... ]]!
(message undefined control sequence)

for example:

luastring=[[
\def\texmacro#1{
\directlua{luafunction(#1)}
}
]]

Where is a problem? Is there any solutions with [[ ... ]]

Thanx Jaroslav

============================================
Here are all functioning scripts:
1) all in one file:

\startluacode
function luafunction(num)
  if num==nil then num = 1 end
     for i=1,num do
         tex.sprint(i..') Hello\\par ')
     end
end

luastring='\\def\\texmacro\#1\{\\directlua\{luafunction(\#1)\}\}'
tex.sprint(luastring)
\stopluacode

\def\texmacrotwo#1{
\directlua{luafunction(#1)}
\par
}

\starttext
     \texmacro{7}
     \texmacrotwo{10}
\stoptext

=====================================================
2) Script in two separates files:

%this is file ulet.tex :
\directlua{dofile("ulet.lua")}

\def\texmacrotwo#1{
     \directlua{luafunction(#1)}
     \par
}

\starttext

\texmacro{7}

\texmacrotwo{10}

\stoptext

And here is content of external file ulet.lua:

function luafunction(num)
     for i=1,num do
         tex.sprint(i..[[) Hello\par]])
     end
end

luastring=[[
\def\texmacro#1{
\directlua{luafunction(#1)}
}
]]

tex.sprint(luastring)

[NTG-context] Strings [[...]] inside \startluacode \stopluacode

Jaroslav Hajtmar