<html><head><meta http-equiv="Content-Type" content="text/html charset=us-ascii"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">Hi Luigi,<div><br></div><div> loadstring is needed, but it is not enough.</div><div><br></div><div>loadstring only load the chunk, it does not need it. A</div><div><br></div><div>As a matter of fact I use: lines = assert(loadstring("return " .. theluafunction)</div><div><br></div><div>From inside the Tex side of LuaLaTeX the addline-function is call</div><div>and it concats the string to string that is proccesed later.</div><div><br></div><div>What I have done is taken this string, get the extract the the string that is</div><div>between dolua( and ), then use the above line.</div><div><br></div><div>Actually, no biggy. I am wandering why Manuel, the packagemaintain,</div><div>had not thought of this.</div><div><br></div><div>I wanted to depict some data I had on the Lua-side with MetaPost.</div><div>But, could not use \directlua inside of the mplibcode-environment.</div><div>I was forced to push everything back to TeX via tex.write.</div><div><br></div><div>I thought it would be better to call you from inside of the mplibcode environment.</div><div><br></div><div>Curious, what Manuel has to say.</div><div><br></div><div>regards</div><div><span class="Apple-tab-span" style="white-space:pre"> </span>Keith </div><div><br></div><div><div><div>Am 08.08.2012 um 17:53 schrieb luigi scarso <<a href="mailto:luigi.scarso@gmail.com">luigi.scarso@gmail.com</a>>:</div><br class="Apple-interchange-newline"><blockquote type="cite"><br><br><div class="gmail_quote">On Wed, Aug 8, 2012 at 5:43 PM, Keith J. Schultz <span dir="ltr"><<a href="mailto:schultzk@uni-trier.de" target="_blank">schultzk@uni-trier.de</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
Hi Manuel, All,<br>
<br>
I find that the mplibcode environment in LuaLaTeX is missing<br>
an important feature. There is no way to call Lua from inside it!<br>
<br>
I have investigated the code and found that the use of the verbatim-<br>
environment is preventing this. But, there is a way to install a Lua-calling<br>
mechanism.<br>
<br>
In the Lua-code of of luamplib. the function addline needs to be patched to<br>
catch a dolua-command, extract the Lua-function, call it and finally feed the result<br>
in the normal way to mplib.<br>
<br>
I have done that!<br>
<br>
Is there an interest for such a feature.? What kind of syntax would be preferred?<br>
<br>
It would be possible to write:<br>
<br>
\begin{mplibcode}<br>
. . .<br>
<br>
dolua(generatesomecommands(with, and, that))<br>
<br>
. . .<br>
\end{mplibcode}<br>
<br>
regards<br>
<span class="HOEnZb"><font color="#888888"> Keith<br>
<br>
<br>
</font></span></blockquote></div><div>isn't loadstring(s [,name]) enough ?</div></blockquote></div><br><div><br></div></div></body></html>