[Haskell-cafe] Colored Haskell Listings in LaTeX

[Artem Pelenitsyn]

Thanks, RIchard!

I talked about your Stitch paper, not the thesis. But thanks for the
reference: the %format things from there are also useful to me.

The newcommands you gave almost worked for me. There are a couple of points:

- newcommand{\varid} → \renewcommand{\Varid}, and the same for conid
(thanks to Oleg again, for leading me to that); otherwise it does nothing;

- keyword: again, it does nothing to me as is given; I wasn't able to find
TeX'y way to do that, so I went to %subst:

%subst keyword a = "\textcolor{BlueViolet}{\textbf{" a "}}"

The resulting minimal-working-example is on this gist:
https://gist.github.com/ulysses4ever/c2374d35326b8644e27d0018b12d8ae3

Still, I would be happy to look at the whole preamble of Stitch: I believe,
there could be something more to steal :)

--
Best wishes,
Artem

On Sat, 23 Jun 2018 at 05:32 Richard Eisenberg <rae at cs.brynmawr.edu> wrote:

> The source code for my thesis is public, and it includes this file:
> https://github.com/goldfirere/thesis/blob/master/tex/rae.fmt
>
> But there weren't colors in my thesis. (Or, at least, the code wasn't
> syntax highlighted with colors.)
>
> These days, I use that fmt file with these definitions in the tex file:
>
> \newcommand{\keyword}[1]{\textcolor{BlueViolet}{\textbf{#1}}}
> \newcommand{\id}[1]{\textsf{\textsl{#1}}}
> \newcommand{\varid}[1]{\textcolor{Sepia}{\id{#1}}}
> \newcommand{\conid}[1]{\textcolor{OliveGreen}{\id{#1}}}
>
>
> I hope this is helpful!
> Richard
>
> On Jun 21, 2018, at 5:20 PM, Artem Pelenitsyn <a.pelenitsyn at gmail.com>
> wrote:
>
> Dear Oleg,
>
> Thanks for the reply! It works modulo line 24 where, it seems, your mail
> client broke the line which happened to be inside comment and that drives
> pdflatex mad. The gist is fine though, so I put the link here:
>
> https://github.com/phadej/gists/blob/master/posts/2018-06-21-colors-in-lhs2tex.tex
>
> Your answer shows the approach one could apply to tune the color of
> various lexical element. I wonder if there are prebaked set of definitions
> covering the whole (or most of) grammar: literals, comments, type
> variables…  {- Obviously, RIchard has one :) -}
>
> --
> Best, Artem
>
> On Thu, 21 Jun 2018 at 19:22 Oleg Grenrus <oleg.grenrus at iki.fi> wrote:
>
>> Hi Artem,
>>
>> I answer with inline lhs2Tex file. Hopefully it helps in your typed-code
>> type-settings!
>>
>> cheers, Oleg.
>>
>> \documentclass{article}
>> %include polycode.fmt
>>
>> \usepackage{hyperref}
>> \hypersetup{pdfborder={0 0 0}}
>>
>> % in lhs2TeX.style there are
>> %
>> % \newcommand{\Conid}[1]{{\mathit #1}}
>> % \newcommand{\Varid}[1]{{\mathit #1}}
>> % \newcommand{\anonymous}{\_}
>> %
>> % We can renew these
>>
>> \usepackage{xcolor}
>> \definecolor{darkred}{rgb}{.5,0,0}
>> \definecolor{darkgreen}{rgb}{0,0.5,0}
>> \definecolor{darkblue}{rgb}{0,0,.5}
>> \definecolor{color4}{rgb}{0,.4,.4}
>> \definecolor{color5}{rgb}{.4,.4,0}
>>
>> \renewcommand{\Conid}[1]{{\color{darkblue}\mathit #1}}
>>
>> % however types and constructors look the same, we can differentiate
>> them though
>>
>> %format Foo = "{\color{darkred}\mathit Foo}"
>> %format MkFoo = "{\color{darkgreen}\mathit Foo}"
>>
>> % Note how I "cheat" making MkFoo render as Foo!
>>
>> % We can also highlight operators
>> %format + = "\mathbin{\color{color4}+}"
>>
>> % or symbols (note I also make thing look prettier)"
>> %format plusFoo = "{\color{color5}\mathit plus_{Foo}}"
>> %format ColorsInLhs2TeX = "{\text{Colors in lhs2\TeX}}"
>>
>> \begin{document}
>>
>> An example of colorful lhs2\TeX\ file.
>> See the source at
>> \url{
>> https://github.com/phadej/gists/blob/master/posts/2018-06-21-colors-in-lhs2tex.tex}%
>> \footnote{It's named tex to trick \emph{Pandoc} in my blog setup},
>> and the result PDF at
>> \url{https://github.com/phadej/gists/blob/master/pdf/ColorsInLhs2TeX.pdf}
>>
>> \begin{code}
>> module ColorsInLhs2TeX where
>>
>> newtype Foo = MkFoo Int
>>
>> plusFoo :: Foo -> Foo -> Int
>> plusFoo (MkFoo n) (MkFoo m) = n + m
>> \end{code}
>> \end{document}
>>
>>
>> On 21.06.2018 18:29, Artem Pelenitsyn wrote:
>> > Dear Cafe,
>> >
>> > In his recent Stitch manuscript,
>> > https://cs.brynmawr.edu/~rae/papers/2018/stitch/stitch.pdf
>> > <https://cs.brynmawr.edu/%7Erae/papers/2018/stitch/stitch.pdf>
>> > Richard Eisenberg mentions that he uses lhs2TeX to typeset Haskell
>> > listings, but I'm not aware of the support for colors in lhs2TeX. Can
>> > anyone suggest how to get such a nice code highlighting (presumably
>> > with lhs2TeX).
>> >
>> > --
>> > Best wishes,
>> > Artem
>> >
>> >
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