jlcode.sty Copyright 2018 GitHub user wg030

This work may be distributed and/or modified under the conditions of the LaTeX Project
Public License, either version 1.3 of this license or (at your option) any later version.
The latest version of this license is in http://www.latex-project.org/lppl.txt
and version 1.3 or later is part of all distributions of LaTeX version 2005/12/01 or later.

This work has the LPPL maintenance status 'maintained'.

The Current Maintainer of this work is GitHub user wg030.

This work consists of the files jlcode.sty, createlists.jl, testfile1.jl, testfile2.jl and manual.pdf.

The jlcode.sty is a latex package, which contains a Julia language definition
for the listings package as well as a style definitions with different themes.
Check out the manual (manual.pdf), which explains all package options and
also shows how the Julia code from testfile.jl and testfile2.jl looks when displayed.

Current version of the jlcode package: 5.0.
Date of creation: 2018/01/25
Date of last modification: 2020/11/25

The lists for the keywords, literals, built-ins, macros and string types for
this language definition were created with the julia script createlists.jl, which
was strongly inspired by the approach of the following script:
https://github.com/isagalaev/highlight.js/blob/master/src/languages/julia.js.

All colors for the default theme of this package were taken from the file
https://docs.julialang.org/en/v1/assets/themes/documenter-light.css
and all colors for the dark theme of this package were taken from the file
https://github.com/dietercastel/jlcode/blob/darktheme/jlcode.sty, which
contains a contribution from "dietercastel" who put toegther this great theme,
which is designed to be ideally suited for the dark-beamer-theme.

All unicode characters that are supported by Julia can be found under
https://docs.julialang.org/en/v1/manual/unicode-input/.

Right now the following of them have already been added to jlcode package, too:

• Most common special characters that appear in latin languages.
• All greek small and capital letters.
• All latin and greek letters with dot, double dot, tilde, hat or bar above.
• All latin double-struck, script and fraktur capital letters.
• All superscripts and subscripts (except for the latin small letter schwa).
• Some mathematical operators and symbols.
• All characters which are used for drawing unicode boxes.

• The package option theme has been added.
• The package options usecolors, usebox, nocolors and nobox have
  been removed for the benefit of the option theme.
• Keywords, literals, built-ins, macros and functions have been refreshed
  according to Julia 1.5.3.
• All latin double-struck, script and fraktur capital letters have been added.
• A few more mathematical symbols have been added.
• All characters which are used for drawing unicode boxes have been added.
• The font size now automatically scales with the size of the current active font.
• The \addlitjlstring command has been renamed to \addlitjlstrnum.
• A few typing errors have been corrected.

Copy the jlcode.sty file to same folder of your latex file and add the
following line to your latex document header, which will load the
package with its default options:

\usepackage{jlcode}

Then use the package as follows:

% listing of standalone files
\jlinputlisting{filename.jl}

% displayed code
\begin{jllisting}
# some julia code
println( "Here we go with Julia!")
\end{jllisting}

% code snippets
Julia's standard library contains some useful macros like \jlinl{@time}.

If you have to display not only Julia code with the listings package,
it is best to not load the Julia style automatically because otherwise
your are very likely to get some unwanted ugly interferences.

\usepackage[autoload=false]{jlcode}

With that option you can then use the style only when it is really needed:

% listing of standalone files
\jlinputlisting[language=julia, style=jlcodestyle]{filename.jl}

% displayed code
\begin{jllisting}[language=julia, style=jlcodestyle]
# some julia code
println( "Here we go with Julia!")
\end{jllisting}

% code snippets
Julia's standard library contains some useful macros like \jlinl{@time}.

The default behaviour is autoload=true.

If you want to highlight your code with some nice colors and/or a nice
surrounding box, choose one of the following five themes:

\usepackage[theme=dflttheme]{jlcode}
%\usepackage[theme=dfltthemenobox]{jlcode}
%\usepackage[theme=bnwtheme]{jlcode}
%\usepackage[theme=bnwthemenobox]{jlcode}
%\usepackage[theme=darktheme]{jlcode}

The default value is theme=dflttheme.

If you decide to go with a theme that has a code box, you can control its
number of characters per line with this option, i.e. influence the width of
the box. However make sure your code respects the limit since otherwise
some of the displayed code will be out of the box.

\usepackage[charsperline=65]{jlcode}

The default value is charsperline=80.

Since it is rather difficult to handle special unicode characters with the
listings package, there are some issues that can appear in special cases
when using the jlcode package.
Most of them have to do with the fact that the listings package does not
seem to offer an option, that makes it possible to force a special unicode
character, for example a small greek beta, to be treated like a normal letter.
Having said this the command

\lstdefinelanguage{julia}
{
  % ...
  alsoletter={β},
  % ...
}

of the listings package unfortunately causes an error.
However the problems that can occur due to this circumstance can be repaired
manually. For that purpose two commands have been implemented in the jlcode
package. The easiest way to show how they work is giving some examples. So
here are the known managable issues and how to fix them with the jlcode package:
(See the provided example files).

• identifier name with a number that follows directly behind a special unicode character:

  • example:

      myβ2ndvar = 2 * 0.12E-2 * xʸ
    

  • latex command for fixing it:

      \addlitjlbase{myβ2ndvar}{my$\beta$2ndvar}{9}
    

• identifier name, which contains a γ, π or φ:

  • example:

      myφvar₊ = sqrt(2)
      approx4π = 3.142
    

  • latex command for fixing it:

      \addlitjlbase{myφvar₊}{my$\phi$var${\scriptstyle {}_{+}}$}{7}
      \addlitjlbase{approx4π}{approx4$\pi$}{8}
    

• numbers in E-notation wihtout using a + sign:

  • example:

      evar = 3.99e400
      evar₂ = 3.99E400
    

  • latex commands for fixing it:

      \addlitjlstrnum{e400}{e400}{4}
      \addlitjlstrnum{E400}{E400}{4}
    

• single characters:

  • example:

      mychar = 'W'
      mychar⁽²⁾ = '€'
      mychar⁽³⁾ = 'ϰ'
    

  • latex commands for fixing it:

      \addlitjlstrnum{'W'}{\textquotesingle W\textquotesingle}{3}
      \addlitjlstrnum{'€'}{\textquotesingle \euro\textquotesingle}{3}
      \addlitjlstrnum{'ϰ'}{\textquotesingle $\varkappa$\textquotesingle}{3}
    

Please feel free to contribute and report bugs!

It would be especially appreciated if you helped me
adding support for more special unicode characters.