Added the `\thesis@backend` tunable to enhance the open-closed

% \tableofcontents

% \tableofcontents

%

%

% \section{Required classes and packages}

% \section{Required classes and packages}

% The class loads the \texttt{rapport3} base class and the

% \begin{macro}{\thesis@backend}

% following packages: \begin{itemize}

% The class requires the class specified in |\thesis@backend|,

% whose default value is |[a4paper]{rapport3}|. If a different

% base class is desired, it can be specified by redefining

% |\thesis@backend| prior to loading the \textsf{fithesis3} class.

%    \begin{macrocode}

\ProvidesClass{fithesis3}[\thesis@version]

\ifx\thesis@backend\undefined

  \def\thesis@backend{[a4paper]{rapport3}}

\fi\expandafter\LoadClass\thesis@backend

%    \end{macrocode}

% \end{macro}

% The class also requires the following packages:

% \begin{itemize}

%   \item\textsf{keyval} -- Adds support for parsing

%   \item\textsf{keyval} -- Adds support for parsing

%     comma-delimited lists of key-value pairs.

%     comma-delimited lists of key-value pairs.

%   \item\textsf{etoolbox} -- Adds support for expanding

%   \item\textsf{etoolbox} -- Adds support for expanding

% \ref{sec:thesis@load}). Other packages may be required by the

% \ref{sec:thesis@load}). Other packages may be required by the

% style files (see Section \ref{sec:style-files}) you are using.

% style files (see Section \ref{sec:style-files}) you are using.

%    \begin{macrocode}

%    \begin{macrocode}

\ProvidesClass{fithesis3}[\thesis@version]

\LoadClass[a4paper]{rapport3}

\RequirePackage{keyval}

\RequirePackage{keyval}

\RequirePackage{etoolbox}

\RequirePackage{etoolbox}

\RequirePackage{ifxetex}

\RequirePackage{ifxetex}