I am writing a LaTeX 2e class with two options msc and phd for my department theses/dissertations. In this class, I need to define a titlepage for the first page of the theses/dissertations which contains the university name, the department name, the title, the author name and so on. The code is something like the following:
\documentclass[phd]{book}
\makeatletter
\newif\if@phdthesis
\@phdthesisfalse
\DeclareOption{phd}{\@phdthesistrue}
\newif\if@mscthesis
\@mscthesisfalse
\DeclareOption{msc}{\@mscthesistrue}
\def\author#1{\gdef\@author{#1}}
\if@mscthesis
\def\mytitle{\begin{titlepage}
\begin{center}
A thesis for the degree of master of science by\\
\@author
\end{center}
\end{titlepage}
}
\fi
\if@phdthesis
\def\mytitle{\begin{titlepage}
\begin{center}
A Dissertation for the Degree of Doctor of Philosophy by\\
\@author
\end{center}
\end{titlepage}
}
\fi
\makeatother
\begin{document}
\author{Vahid}
\mytitle
\chapter{Chapter Name}
bla bla bla
\newpage
bla bla bla
\end{document}
But I get an error: Undefined control sequence.l.32 \mytitle. I am wondering if anybody help me solve this problem.
Best Answer
You get this error, because you define the two versions of
\mytitleinside conditionals. Both of them are false in you example, so the macro never gets defined.You missing an
\ProcessOptionswhich actually handles the given[phd]option, before the first use of theif's:I assume here the code is in a class file. Please also see the
clsguidefor more information on how to define options.