Please why does etex.sty fail to load with active =
?
\documentclass[a4paper]{article}
\usepackage[T1]{fontenc}
\usepackage[turkish]{babel}
\catcode`\==13
\makeatletter
\bbl@activate{=}
\makeatother
\usepackage[style=authortitle-icomp]{biblatex}
\addbibresource{biblatex-examples.bib}
\begin{document}
\section*{The \texttt{authortitle-icomp} style}
This style combines the features of \texttt{authortitle-ibid} and
\texttt{authortitle-comp}. It will implicitly enable the
\texttt{sortcites} package option at load time. This style is
intended for citations given in footnotes.
\footcite{aristotle:rhetoric,averroes/bland,aristotle:physics,aristotle:poetics}
\printbibliography
\end{document}
I get the error:
! Undefined control sequence.
\globmarks ->\et@xglob
6\marks \mathchardef
l.240 \let\newmarks=\globmarks
Moving
\catcode`\=\string=13
\makeatletter
\bbl@activate{=}
\makeatother
into the document body works, but I am still interested in why etex won't load with active =
. Beyond etex, biblatex can't process its options when =
is active.
=
is used in the syntax rules of TeX and in those cases it must have category code 12; so any assignment such as\let\a=\b
will fail if=
is active and its replacement text is not a category code 12=
. – egreg Nov 12 '12 at 14:20