\PassOptionsToPackage{unicode=true}{hyperref} % options for packages loaded elsewhere \PassOptionsToPackage{hyphens}{url} % \documentclass[ ]{article} \usepackage{lmodern} \usepackage{amssymb,amsmath} \usepackage{ifxetex,ifluatex} \ifnum 0\ifxetex 1\fi\ifluatex 1\fi=0 % if pdftex \usepackage[T1]{fontenc} \usepackage[utf8]{inputenc} \usepackage{textcomp} % provides euro and other symbols \else % if luatex or xelatex \usepackage{unicode-math} \defaultfontfeatures{Scale=MatchLowercase} \defaultfontfeatures[\rmfamily]{Ligatures=TeX,Scale=1} \fi % use upquote if available, for straight quotes in verbatim environments \IfFileExists{upquote.sty}{\usepackage{upquote}}{} \IfFileExists{microtype.sty}{% use microtype if available \usepackage[]{microtype} \UseMicrotypeSet[protrusion]{basicmath} % disable protrusion for tt fonts }{} \makeatletter \@ifundefined{KOMAClassName}{% if non-KOMA class \IfFileExists{parskip.sty}{% \usepackage{parskip} }{% else \setlength{\parindent}{0pt} \setlength{\parskip}{6pt plus 2pt minus 1pt}} }{% if KOMA class \KOMAoptions{parskip=half}} \makeatother \usepackage{xcolor} \IfFileExists{xurl.sty}{\usepackage{xurl}}{} % add URL line breaks if available \IfFileExists{bookmark.sty}{\usepackage{bookmark}}{\usepackage{hyperref}} \hypersetup{ pdfborder={0 0 0}, breaklinks=true} \urlstyle{same} % don't use monospace font for urls \usepackage{listings} \newcommand{\passthrough}[1]{#1} \lstnewenvironment{code}{\lstset{language=Haskell,basicstyle=\small\ttfamily}}{} \setlength{\emergencystretch}{3em} % prevent overfull lines \providecommand{\tightlist}{% \setlength{\itemsep}{0pt}\setlength{\parskip}{0pt}} \setcounter{secnumdepth}{0} % Redefines (sub)paragraphs to behave more like sections \ifx\paragraph\undefined\else \let\oldparagraph\paragraph \renewcommand{\paragraph}[1]{\oldparagraph{#1}\mbox{}} \fi \ifx\subparagraph\undefined\else \let\oldsubparagraph\subparagraph \renewcommand{\subparagraph}[1]{\oldsubparagraph{#1}\mbox{}} \fi % set default figure placement to htbp \makeatletter \def\fps@figure{htbp} \makeatother \date{} \begin{document} \hypertarget{lhs-test}{% \section{lhs test}\label{lhs-test}} \texttt{unsplit} is an arrow that takes a pair of values and combines them to return a single value: \begin{code} unsplit :: (Arrow a) => (b -> c -> d) -> a (b, c) d unsplit = arr . uncurry -- arr (\op (x,y) -> x `op` y) \end{code} \texttt{(***)} combines two arrows into a new arrow by running the two arrows on a pair of values (one arrow on the first item of the pair and one arrow on the second item of the pair). \begin{verbatim} f *** g = first f >>> second g \end{verbatim} Block quote: \begin{quote} foo bar \end{quote} \end{document}