\let vs hyperrref

manpreet Best Answer 3 years ago

In the following sample from my custom syllabus class, I am getting a new error since updating my TeXLive 2015 distribution to the most recent release today. The error is TeX capacity exceeded.

As far as I can tell the error is the result of an interaction between the \let, the \addcontentslinecommand, and the hyperref package. If I define \term as a regular \newcommand, or if I omit the \addcontentsline, then it works with hyperref.

Why can't I use a \let command inside \addcontentsline with hyperref?

\documentclass{article}
\usepackage{xparse}

\newcounter{Week}
\newcommand{\WeekLabel}{Week \theWeek\quad}
\DeclareDocumentCommand{\Week}{o m}{%                                                                                                                                                          
  \stepcounter{Week}
  \def\ThisWeek{\WeekLabel #2}
  \subsection*{\ThisWeek}
  \addcontentsline{toc}{subsection}{\ThisWeek}%                                                                                                                                                
}

\newcommand{\term}[1]{\emph{#1}} % no error                                                                                                                                                    
%\let\term\emph % produces error with hyperref, why?                                                                                                                                           

\usepackage{hyperref}

\begin{document}

\section*{Syllabus}
\tableofcontents

\section{Eighteenth-Century Opera}

\Week[11/09]{Italian \term{opera seria}}

\Week[11/15]{Italian \term{opera buffa}}

\end{document}

manpreet 3 years ago

\newcommand{\term}{\emph}

\usepackage{hyperref}
\pdfstringdefDisableCommands{\let\term\relax}