[Tex/LaTex] Undefined control sequence \likechapter

chapterstable of contents

I'm trying to make a ToC that would have numbered chapters and other items which would be numbered but would not be chapters.
To this end I'm trying to use a snippet I've found on the Web:

\makeatletter
     \renewcommand{\@dotsep}{2}
     \newcommand{\l@likechapter}[2]{{\bfseries\@dottedtocline{0}{0pt}{0pt}{#1}{#2}}}
 \makeatother 

\newcommand{\likechapter}[1]
{  
       \likechapterheading{#1}  
       \addcontentsline{toc}{likechapter}
{
\MakeUppercase{#1}
}
}

which upon rendering leads TeXLive to complain with:

! Undefined control sequence.
\likechapter #1-> \likechapterheading 
                                      {#1} \addcontentsline {toc}{likechapte...
l.331  \likechapter {Intro}

What am I doing wrong?

Best Answer

TeX/LaTeX complains about \likechapterheading as being undefined and used in \likechapter, i.e. it tries to expand \likechapter and stumbles over \likechapterheading, being unknown.

The example should be compilable if \providecommand{\likechapterheading}[1]{} is given, i.e. provide it if is not defined already, otherwise ignore the new definition.

Please note, that the ToC entry looks wrong from a typesetting point of view (indentation!)

\documentclass{book}

\providecommand{\likechapterheading}[1]{}


\makeatletter
\renewcommand{\@dotsep}{2}
\newcommand{\l@likechapter}[2]{{\bfseries\@dottedtocline{0}{0pt}{0pt}{#1}{#2}}}
\makeatother 

\newcommand{\likechapter}[1]{%  
  \likechapterheading{#1}  
  \addcontentsline{toc}{likechapter}{%
   \MakeUppercase{#1}%
  }%
}

\begin{document}
\tableofcontents

\chapter{Foo}
\likechapter{Foobar}

\end{document}

Related Solutions

[Tex/LaTex] “Undefined control sequence” problem in memoir class

The definition you have been modifying stems from book.cls, so it is clear it works there. memoir.cls has a completely different way of defining chapters, so you can easily produce a conflict by "injecting" code from book.cls there. Document structure etc. are completely in the resposibility of document classes, so you need to consider which class you are using. Please modify the code from memoir.cls instead.

Here is a starting point. I tried to be as "minimally invasive" as possible, but I'm really no Memoir expert. From the look of it, it'll need some more fiddling, but the definitions are really quite different:

\makeatletter
\setlength{\cftbeforechapterskip}{2.0em \@plus\p@}
\renewcommand{\cftchapterfont}{\bfseries\sffamily}
\renewcommand*{\l@chapapp}[3]{%
  \ifnum \c@tocdepth >\m@ne
    \cftchapterbreak
    \vskip \cftbeforechapterskip
    {%\leftskip \cftchapterindent\relax
     \memRTLleftskip \cftchapterindent\relax
%%%     \rightskip \@tocrmarg
     \memRTLrightskip \@tocrmarg
%%%     \parfillskip -\rightskip
     \parfillskip -\memRTLrightskip
     \parindent \cftchapterindent\relax
     \@afterindenttrue
     \interlinepenalty\@M
     \leavevmode
     \let\@cftbsnum \cftchapterpresnum
     \let\@cftasnum \cftchapteraftersnum
     \let\@cftasnumb \cftchapteraftersnumb
     \def\@chapapp@head{#3}%
     \settowidth{\@tempdima}{\cftchapterfont\@chapapp@head}%
     \addtolength{\@tempdima}{\cftchapternumwidth}%
%%%     \advance\leftskip \@tempdima \null\nobreak\hskip -\leftskip
     \advance\memRTLleftskip \@tempdima \null\nobreak\hskip -\memRTLleftskip
      \colorbox{ptctitle}{\strut%
        \makebox[\dimexpr\textwidth-2\fboxsep-7pt\relax][l]{%
          \color{white}\cftchapterfont#1%
          \nobreak{\cftchapterleader}\nobreak
    \cftchapterformatpnum{#2}%
    \cftchapterafterpnum}}\par\smallskip}%
  \fi}
\makeatother

example output

[Tex/LaTex] Undefined control sequence on \cftaddtitleline

You need to load the tocloft package providing the \cftaddtitleline command:

\documentclass{article}
\usepackage{tocloft}
\begin{document}
\tableofcontents
\cftaddtitleline{toc}{section}{Topic 1}{}
\end{document}

or switch to the memoir document class which also provides the command:

\documentclass[article]{memoir}
\begin{document}
\tableofcontents*
\cftaddtitleline{toc}{section}{Topic 1}{}
\end{document}

Best Answer

Related Solutions

[Tex/LaTex] “Undefined control sequence” problem in memoir class

[Tex/LaTex] Undefined control sequence on \cftaddtitleline

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