\documentclass[10pt,a4paper]{article}

% Packages
\usepackage{fancyhdr}           % For header and footer
\usepackage{multicol}           % Allows multicols in tables
\usepackage{tabularx}           % Intelligent column widths
\usepackage{tabulary}           % Used in header and footer
\usepackage{hhline}             % Border under tables
\usepackage{graphicx}           % For images
\usepackage{xcolor}             % For hex colours
%\usepackage[utf8x]{inputenc}    % For unicode character support
\usepackage[T1]{fontenc}        % Without this we get weird character replacements
\usepackage{colortbl}           % For coloured tables
\usepackage{setspace}           % For line height
\usepackage{lastpage}           % Needed for total page number
\usepackage{seqsplit}           % Splits long words.
%\usepackage{opensans}          % Can't make this work so far. Shame. Would be lovely.
\usepackage[normalem]{ulem}     % For underlining links
% Most of the following are not required for the majority
% of cheat sheets but are needed for some symbol support.
\usepackage{amsmath}            % Symbols
\usepackage{MnSymbol}           % Symbols
\usepackage{wasysym}            % Symbols
%\usepackage[english,german,french,spanish,italian]{babel}              % Languages

% Document Info
\author{erezsh}
\pdfinfo{
  /Title (lark.pdf)
  /Creator (Cheatography)
  /Author (erezsh)
  /Subject (Lark Cheat Sheet)
}

% Lengths and widths
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\addtolength{\voffset}{-2cm}
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\setlength{\headheight}{85pt} % If less, LaTeX automatically increases it
\renewcommand{\footrulewidth}{0pt} % Remove footer line
\renewcommand{\headrulewidth}{0pt} % Remove header line
\renewcommand{\seqinsert}{\ifmmode\allowbreak\else\-\fi} % Hyphens in seqsplit
% This two commands together give roughly
% the right line height in the tables
\renewcommand{\arraystretch}{1.3}
\onehalfspacing

% Commands
\newcommand{\SetRowColor}[1]{\noalign{\gdef\RowColorName{#1}}\rowcolor{\RowColorName}} % Shortcut for row colour
\newcommand{\mymulticolumn}[3]{\multicolumn{#1}{>{\columncolor{\RowColorName}}#2}{#3}} % For coloured multi-cols
\newcolumntype{x}[1]{>{\raggedright}p{#1}} % New column types for ragged-right paragraph columns
\newcommand{\tn}{\tabularnewline} % Required as custom column type in use

% Font and Colours
\definecolor{HeadBackground}{HTML}{333333}
\definecolor{FootBackground}{HTML}{666666}
\definecolor{TextColor}{HTML}{333333}
\definecolor{DarkBackground}{HTML}{3360A3}
\definecolor{LightBackground}{HTML}{F2F5F9}
\renewcommand{\familydefault}{\sfdefault}
\color{TextColor}

% Header and Footer
\pagestyle{fancy}
\fancyhead{} % Set header to blank
\fancyfoot{} % Set footer to blank
\fancyhead[L]{
\noindent
\begin{multicols}{3}
\begin{tabulary}{5.8cm}{C}
    \SetRowColor{DarkBackground}
    \vspace{-7pt}
    {\parbox{\dimexpr\textwidth-2\fboxsep\relax}{\noindent
        \hspace*{-6pt}\includegraphics[width=5.8cm]{/web/www.cheatography.com/public/images/cheatography_logo.pdf}}
    }
\end{tabulary}
\columnbreak
\begin{tabulary}{11cm}{L}
    \vspace{-2pt}\large{\bf{\textcolor{DarkBackground}{\textrm{Lark Cheat Sheet}}}} \\
    \normalsize{by \textcolor{DarkBackground}{erezsh} via \textcolor{DarkBackground}{\uline{cheatography.com/61630/cs/15903/}}}
\end{tabulary}
\end{multicols}}

\fancyfoot[L]{ \footnotesize
\noindent
\begin{multicols}{3}
\begin{tabulary}{5.8cm}{LL}
  \SetRowColor{FootBackground}
  \mymulticolumn{2}{p{5.377cm}}{\bf\textcolor{white}{Cheatographer}}  \\
  \vspace{-2pt}erezsh \\
  \uline{cheatography.com/erezsh} \\
  \end{tabulary}
\vfill
\columnbreak
\begin{tabulary}{5.8cm}{L}
  \SetRowColor{FootBackground}
  \mymulticolumn{1}{p{5.377cm}}{\bf\textcolor{white}{Cheat Sheet}}  \\
   \vspace{-2pt}Published 26th May, 2018.\\
   Updated 29th September, 2020.\\
   Page {\thepage} of \pageref{LastPage}.
\end{tabulary}
\vfill
\columnbreak
\begin{tabulary}{5.8cm}{L}
  \SetRowColor{FootBackground}
  \mymulticolumn{1}{p{5.377cm}}{\bf\textcolor{white}{Sponsor}}  \\
  \SetRowColor{white}
  \vspace{-5pt}
  %\includegraphics[width=48px,height=48px]{dave.jpeg}
  Measure your website readability!\\
  www.readability-score.com
\end{tabulary}
\end{multicols}}




\begin{document}
\raggedright
\raggedcolumns

% Set font size to small. Switch to any value
% from this page to resize cheat sheet text:
% www.emerson.emory.edu/services/latex/latex_169.html
\footnotesize % Small font.

\begin{multicols*}{2}

\begin{tabularx}{8.4cm}{x{3.6 cm} x{4.4 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{8.4cm}}{\bf\textcolor{white}{Lark Options}}  \tn
% Row 0
\SetRowColor{LightBackground}
`parser="earley"` & {\bf{Earley}} - default \tn 
% Row Count 1 (+ 1)
% Row 1
\SetRowColor{white}
`parser="lalr"` & {\bf{LALR(1)}} \tn 
% Row Count 2 (+ 1)
% Row 2
\SetRowColor{LightBackground}
`debug=True` & Enable debug prints \tn 
% Row Count 3 (+ 1)
% Row 3
\SetRowColor{white}
\{\{nobreak\}\}`lexer="standard"` & Revert to simple lexer \tn 
% Row Count 5 (+ 2)
% Row 4
\SetRowColor{LightBackground}
\{\{nobreak\}\}`ambiguity='explicit'` & Return all derivations for Earley \tn 
% Row Count 7 (+ 2)
% Row 5
\SetRowColor{white}
`start="foo"` & Set starting rule \tn 
% Row Count 8 (+ 1)
% Row 6
\SetRowColor{LightBackground}
`cache=True` & Enable grammar caching \tn 
% Row Count 9 (+ 1)
% Row 7
\SetRowColor{white}
`transformer=...` & Apply transformer to tree (for LALR) \tn 
% Row Count 11 (+ 2)
% Row 8
\SetRowColor{LightBackground}
\{\{nobreak\}\}`propagate\_positions` & Fill tree instances with line number information \tn 
% Row Count 14 (+ 3)
% Row 9
\SetRowColor{white}
\{\{nobreak\}\}`maybe\_placeholders` & `{[}{]}` returns `None` when not matched \tn 
% Row Count 16 (+ 2)
% Row 10
\SetRowColor{LightBackground}
\seqsplit{`keep\_all\_tokens=True`} & Don't remove unnamed terminals \tn 
% Row Count 18 (+ 2)
% Row 11
\SetRowColor{white}
`postlex` & Provide a wrapper for the lexer \tn 
% Row Count 20 (+ 2)
% Row 12
\SetRowColor{LightBackground}
`tree\_class` & Provide an alternative for `Tree` \tn 
% Row Count 22 (+ 2)
% Row 13
\SetRowColor{white}
`regex=True` & Use the `regex` module \tn 
% Row Count 23 (+ 1)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{x{4 cm} x{4 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{8.4cm}}{\bf\textcolor{white}{Tree Reference}}  \tn
% Row 0
\SetRowColor{LightBackground}
`tree.data` & Rule name \tn 
% Row Count 1 (+ 1)
% Row 1
\SetRowColor{white}
`tree.children` & Rule matches \tn 
% Row Count 2 (+ 1)
% Row 2
\SetRowColor{LightBackground}
`tree.meta` & Positional information, if enabled \tn 
% Row Count 4 (+ 2)
% Row 3
\SetRowColor{white}
\mymulticolumn{2}{x{8.4cm}}{`print(tree.pretty())`} \tn 
% Row Count 5 (+ 1)
% Row 4
\SetRowColor{LightBackground}
\seqsplit{`tree.iter\_subtrees()`} & Iterate all subtrees \tn 
% Row Count 7 (+ 2)
% Row 5
\SetRowColor{white}
\{\{nobreak\}\}`tree.find\_data("foo")` & Find by rule \tn 
% Row Count 9 (+ 2)
% Row 6
\SetRowColor{LightBackground}
\seqsplit{`tree.find\_pred(...)`} & Find by predicate \tn 
% Row Count 11 (+ 2)
% Row 7
\SetRowColor{white}
\mymulticolumn{2}{x{8.4cm}}{`tree1 == tree2`} \tn 
% Row Count 12 (+ 1)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{x{4.08 cm} x{3.92 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{8.4cm}}{\bf\textcolor{white}{Token Reference}}  \tn
% Row 0
\SetRowColor{LightBackground}
`token.type` & Terminal name \tn 
% Row Count 1 (+ 1)
% Row 1
\SetRowColor{white}
`token.value` & Matched text \tn 
% Row Count 2 (+ 1)
% Row 2
\SetRowColor{LightBackground}
\seqsplit{`token.pos\_in\_stream`} & Index in source text \tn 
% Row Count 4 (+ 2)
% Row 3
\SetRowColor{white}
\mymulticolumn{2}{x{8.4cm}}{`token.line`} \tn 
% Row Count 5 (+ 1)
% Row 4
\SetRowColor{LightBackground}
\mymulticolumn{2}{x{8.4cm}}{`token.column`} \tn 
% Row Count 6 (+ 1)
% Row 5
\SetRowColor{white}
\mymulticolumn{2}{x{8.4cm}}{`token.end\_line`} \tn 
% Row Count 7 (+ 1)
% Row 6
\SetRowColor{LightBackground}
\mymulticolumn{2}{x{8.4cm}}{\{\{nobreak\}\}`token.end\_column`} \tn 
% Row Count 8 (+ 1)
% Row 7
\SetRowColor{white}
\mymulticolumn{2}{x{8.4cm}}{`token.end\_pos`} \tn 
% Row Count 9 (+ 1)
% Row 8
\SetRowColor{LightBackground}
\mymulticolumn{2}{x{8.4cm}}{`len(token)`} \tn 
% Row Count 10 (+ 1)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\SetRowColor{LightBackground}
\mymulticolumn{2}{x{8.4cm}}{Tokens inherit from `str`, so all string operations are valid (such as `token.upper()`).}  \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{x{3.44 cm} x{4.56 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{8.4cm}}{\bf\textcolor{white}{Grammar Definitions}}  \tn
% Row 0
\SetRowColor{LightBackground}
`rule: ...` & Define a rule \tn 
% Row Count 1 (+ 1)
% Row 1
\SetRowColor{white}
`TERM: ...` & Define a terminal \tn 
% Row Count 2 (+ 1)
% Row 2
\SetRowColor{LightBackground}
`rule.n: ...` & Rule with priority n \tn 
% Row Count 3 (+ 1)
% Row 3
\SetRowColor{white}
`TERM.n: ...` & Terminal with priority n \tn 
% Row Count 5 (+ 2)
% Row 4
\SetRowColor{LightBackground}
`// text` & Comment \tn 
% Row Count 6 (+ 1)
% Row 5
\SetRowColor{white}
`\%ignore ...` & Ignore terminal in input \tn 
% Row Count 8 (+ 2)
% Row 6
\SetRowColor{LightBackground}
`\%import ...` & Import terminal from file \tn 
% Row Count 10 (+ 2)
% Row 7
\SetRowColor{white}
\{\{nobreak\}\}`\%declare TERM` & Declare a terminal without a pattern (used for postlex) \tn 
% Row Count 13 (+ 3)
% Row 8
\SetRowColor{LightBackground}
\{\{nobreak\}\}`t\{p1, p2\}: ...` & Define template \tn 
% Row Count 15 (+ 2)
% Row 9
\SetRowColor{white}
\{\{nobreak\}\}`rule: t\{foo, bar\}` & Use template \tn 
% Row Count 17 (+ 2)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\SetRowColor{LightBackground}
\mymulticolumn{2}{x{8.4cm}}{{\bf{Rules}} consist of values, other rules and terminals. \newline {\bf{Terminals}} only consist of values and other terminals.}  \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{x{2.08 cm} x{5.92 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{8.4cm}}{\bf\textcolor{white}{Grammar Patterns}}  \tn
% Row 0
\SetRowColor{LightBackground}
`foo bar` & Match sequence \tn 
% Row Count 1 (+ 1)
% Row 1
\SetRowColor{white}
`(foo bar)` & Group together (for operations) \tn 
% Row Count 3 (+ 2)
% Row 2
\SetRowColor{LightBackground}
`foo | bar` & Match one or the other \tn 
% Row Count 5 (+ 2)
% Row 3
\SetRowColor{white}
`foo?` & Match 0 or 1 instances \tn 
% Row Count 6 (+ 1)
% Row 4
\SetRowColor{LightBackground}
`{[}foo bar{]}` & Match 0 or 1 instances \tn 
% Row Count 8 (+ 2)
% Row 5
\SetRowColor{white}
`foo*` & Match 0 or more instances \tn 
% Row Count 9 (+ 1)
% Row 6
\SetRowColor{LightBackground}
`foo+` & Match 1 or more instances \tn 
% Row Count 10 (+ 1)
% Row 7
\SetRowColor{white}
`foo\textasciitilde{}3` & Match exactly 3 instances \tn 
% Row Count 11 (+ 1)
% Row 8
\SetRowColor{LightBackground}
`foo\textasciitilde{}3..5` & Match between 3 to 5 instances \tn 
% Row Count 13 (+ 2)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{x{2.32 cm} x{5.68 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{8.4cm}}{\bf\textcolor{white}{Terminal Atoms}}  \tn
% Row 0
\SetRowColor{LightBackground}
`"string"` & String to match \tn 
% Row Count 1 (+ 1)
% Row 1
\SetRowColor{white}
\seqsplit{`"string"i`} & Case-insensitive string \tn 
% Row Count 2 (+ 1)
% Row 2
\SetRowColor{LightBackground}
`/regexp/` & Regular Expression \tn 
% Row Count 3 (+ 1)
% Row 3
\SetRowColor{white}
\seqsplit{`/re/imslux`} & Regular Expression with flags \tn 
% Row Count 5 (+ 2)
% Row 4
\SetRowColor{LightBackground}
`"a".."z"` & Literal range \tn 
% Row Count 6 (+ 1)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{x{4.4 cm} x{3.6 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{8.4cm}}{\bf\textcolor{white}{Tree Shaping}}  \tn
% Row 0
\SetRowColor{LightBackground}
`rule: "foo" BAR` & "foo" will be filtered out \tn 
% Row Count 2 (+ 2)
% Row 1
\SetRowColor{white}
`!rule: "foo" BAR` & "foo" will be kept \tn 
% Row Count 3 (+ 1)
% Row 2
\SetRowColor{LightBackground}
`rule: /foo/ BAR` & /foo/ will be kept \tn 
% Row Count 4 (+ 1)
% Row 3
\SetRowColor{white}
`\_TERM` & Filter out this terminal \tn 
% Row Count 6 (+ 2)
% Row 4
\SetRowColor{LightBackground}
`\_rule` & Always inline this rule \tn 
% Row Count 8 (+ 2)
% Row 5
\SetRowColor{white}
`?rule: ...` & Inline if matched 1 child \tn 
% Row Count 10 (+ 2)
% Row 6
\SetRowColor{LightBackground}
\{\{nobreak\}\}`foo bar -\textgreater{} new\_name` & Rename this derivation \tn 
% Row Count 12 (+ 2)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\SetRowColor{LightBackground}
\mymulticolumn{2}{x{8.4cm}}{{\bf{Rules}} are a branch (node) in the resulting tree, and its children are its matches, in the order of matching. \newline {\bf{Terminals}} (tokens) are always values in the tree, never branches. \newline {\bf{Inlining rules}} means removing their branch and replacing it with their children.}  \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{8.4cm}}{\bf\textcolor{white}{Examples}}  \tn
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{8.4cm}}{// Define template for comma-separated list \newline cs\_list\{item\}: item ("," item){\emph{ \newline  \newline // Use template to make a list of numbers \newline number\_list: cs\_list\{ number \} \newline  \newline // Example of a terminal for a Python comment \newline PY\_COMMENT: /\#{[}\textasciicircum{}\textbackslash{}n{]}}}/ \newline  \newline // Example of a terminal for C comment \newline C\_COMMENT: "/{\emph{" /.}}?/s "*/"} \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}


% That's all folks
\end{multicols*}

\end{document}