<div dir="ltr">2016-03-18 10:55 GMT+01:00 Philip Taylor <span dir="ltr"><<a href="mailto:P.Taylor@rhul.ac.uk" target="_blank">P.Taylor@rhul.ac.uk</a>></span>:<br><div class="gmail_extra"><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><span class=""><br>
<br>
Arthur Reutenauer wrote:<br>
<br>
> Of course they can /know/: by inspecting the log file. It contains<br>
> the exact transcript of the TeX run, and thus reflects all of TeX's<br>
> knowledge about what happened when compiling the file; as far as<br>
> overfull \hbox'es, etc. are concerned.<br>
<br>
</span>Augmented by anything that the program elects to write to the log file.<br>
A program can elect to write an "overfull \hbox" message to the log<br>
file even if no overfull \hbox has actually occurred.<br></blockquote><div><br></div><div>Even now it is possible to swich to \scrollmode or \nonstopmode and issue \errmsg although no error appeared. As another test I inserted the following:<br><br>\setbox254=\hbox to .1pt{A}<br><br></div><div>It reports an overfull hbox although the box is never used. Thus if the code does not behave in a decent way, it can always be cheated.<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<span class=""><br>
> Do you *understand* what I /mean/ ?<br>
<br>
</span>Not only do I understand what you mean, I also understand that you fail<br>
to appreciate the difference between "know if an overfull \hbox has<br>
occurred " (which is *TeX's state) and "believe that an overfull \hbox<br>
has occurred" (which is the state of any adjunct program attempting to<br>
determine the state of *TeX's knowledge simply by inspecting the log file).<br>
<span class=""><font color="#888888"><br>
Philip Taylor<br>
</font></span><div class=""><div class="h5"><br></div></div></blockquote><div><br><br clear="all"><div><div class="gmail_signature">Zdeněk Wagner<br><a href="http://ttsm.icpf.cas.cz/team/wagner.shtml" target="_blank">http://ttsm.icpf.cas.cz/team/wagner.shtml</a><br><a href="http://icebearsoft.euweb.cz" target="_blank">http://icebearsoft.euweb.cz</a></div></div>
<br> </div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div class=""><div class="h5">
<br>
--------------------------------------------------<br>
Subscriptions, Archive, and List information, etc.:<br>
<a href="http://tug.org/mailman/listinfo/xetex" rel="noreferrer" target="_blank">http://tug.org/mailman/listinfo/xetex</a><br>
</div></div></blockquote></div><br></div></div>