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This file is part of Logtalk https://logtalk.org/ SPDX-FileCopyrightText: 1998-2023 Paulo Moura <pmoura@logtalk.org> SPDX-License-Identifier: Apache-2.0

Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.

This folder contains a simple Logtalk language definition for the LaTeX package listings:

http://www.ctan.org/tex-archive/macros/latex/contrib/listings/

To use the language definition copy the lstlang0.sty to the same folder where you have the LaTeX source files that you're typesetting and add the following lines to your main LaTeX file:

\usepackage{listings}
\usepackage{textcomp}

The textcomp package is required as the Logtalk language definition sets the upquote option to true.

If you want keywords in bold face in the code listings, you will also need to use fonts that support that face. You can use e.g. one of the following font packages:

\usepackage[scaled=0.8]{couriers}
\usepackage{pxfonts}
\usepackage{lmodern}
\usepackage{txfonts}

Default options for all code listings can be set using something like:

\lstset{
        language=Logtalk,
        basicstyle=\small\ttfamily,
        keywordstyle=\bfseries,
        tabsize=4,
        numbers=none, numberstyle=\tiny, stepnumber=1, numbersep=5pt,
        showspaces=false, showstringspaces=false,
        captionpos=b,
        frame=lines,
        upquote=true,
        framextopmargin=6pt, framexbottommargin=6pt,
        aboveskip=\medskipamount, lineskip={-2.0pt}
}

If you need to highlight additional keywords, you can always use the morekeywords option as an alternative to edit the lstlang0.sty file. For example:

morekeywords={extends_object, implements_protocol}

For inline code use `\lstinline{...}` and for code blocks use:

\begin{lstlisting}[language=Logtalk, ...]
        ...
\end{lstlisting}

Consult the listings package documentation (e.g. by running the command `texdoc listings`) and experiment with the above settings to get the exact appearance that your publication requires.