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\documentclass[a4paper]{article}
\usepackage{expl3}
\usepackage[overload]{empheq}
\usepackage{breqn}
\begin{document}
This is a test document for general fontification support of macros
and environments provided by \LaTeX{} and other packages within
AUC\TeX. As it is not part of \verb|ert|-tests, it does not have an
\verb|out|-counterpart.
\part{Macros}
\section{Special characters}
\subsection{Standard reserved characters}
\subsubsection{\protect\LaTeX{} input}
The following symbols are reserved characters that have a special
meaning under \LaTeX{}.
\begin{center}
\begin{tabular}{@{}*{8}{c}}
\hline
\verb|#| & \verb|$| & \verb|%| & \verb|^|
& \verb|&| & \verb|_| & \verb|{| & \verb|}| \\
\verb|~| & \verb|`| & \verb|'| & \verb|=|
& \verb|.| \\
\hline
\end{tabular}\\
\end{center}
In a document, characters in the first line are printed by using a
prefix \verb|\| (backslash). The characters in the second line become
control symbols taking an argument when prefixed with a backslash.
\subsubsection{AUC\protect\TeX{} fontification}
AUC\TeX{} has the following strategy for fontification:
\begin{description}
\item[Control symbols without argument] do not get any fontification
as they only print a special character and have a textual context,
e.g. \$10, 5\%, Mr.\&Mrs. They are listed below:
\begin{center}
\begin{tabular}{@{}*{4}{cl}@{}}
\hline
\# & \verb|\#| & \$ & \verb|\$|
& \% & \verb|\%| & \& & \verb|\&| \\
\_ & \verb|\_| & \{ & \verb|\{|
& \} & \verb|\}| \\
\hline
\end{tabular}
\end{center}
\item[Control symbols with argument] do not receive any fontification.
These macros take a mandatory argument, but they have a textual
context. Since the argument is usually not enclosed in braces,
fontification would be rather distracting:
\begin{center}
\begin{tabular}{@{}*{4}{cl}@{}}
\hline
\`o & \verb|\`o| & \'o & \verb|\'o|
& \^o & \verb|\^o| & \~o & \verb|\~o| \\
\=o & \verb|\=o| & \.o & \verb|\.o|
& \"o & \verb|\"o| \\
\hline
\end{tabular} \\[1ex]
\begin{minipage}{0.4\linewidth}\centering
H\^{o}tel, na\"\i ve, \'{e}l\`{e}ve,\\
sm\o rrebr\o d, !`Se\~{n}orita!
\end{minipage}\quad
\begin{minipage}{0.4\linewidth}\centering
H\^otel, na\"\i ve, \'el\`eve,\\
sm\o rrebr\o d, !`Se\~norita!
\end{minipage}
\end{center}
\item[Control words] receive fontification, e.g.
\begin{center}
\begin{tabular}{@{}*{4}{cl}@{}}
\hline
\u o & \verb|\u o| & \v o & \verb|\v o|
& \H o & \verb|\H o| & \c o & \verb|\c o| \\
\d o & \verb|\d o| & \b o & \verb|\b o|
& \t oo & \verb|\t oo| \\[6pt]
\oe & \verb|\oe| & \OE & \verb|\OE|
& \ae & \verb|\ae| & \AE & \verb|\AE| \\
\aa & \verb|\aa| & \AA & \verb|\AA|
& \c c & \verb|\c c| \\[6pt]
\o & \verb|\o| & \O & \verb|\O|
& \l & \verb|\l| & \L & \verb|\L| \\
\i & \verb|\i| & \j & \verb|\J|
& \ss & \verb|\ss| \\
\hline
\end{tabular}\\[1ex]
\end{center}
\end{description}
\subsection{@ character}
\subsubsection{\protect\LaTeX{} input}
In regular text, \verb|@| is not a special character and can be used
as `foo@bar'. Further, \verb|\@| can be used to force a wide space
after an uppercase character, e.g. PC\@.
On the other hand, \verb|@| is used as ``letter'' for defining internal
macros, e.g. \verb|\@gobble|.
\subsubsection{AUC\protect\TeX{} fontification}
Being a non-textual macro, \verb|\@| receives a fontification in
AUC\TeX. Used as letter as part of a macro, it gets the fontification
as the rest. Example \bgroup\ttfamily \string\@gobble\egroup.
\subsection{\_ and : characters}
\subsubsection{\protect\LaTeX{} input}
For \LaTeXe, the behavior of \verb|_| and \verb|\_| was described
above. \verb|:| is not special for regular text. \verb|\:| is a
spacing macro ($\frac{4}{18}$ quad) within math mode.
\LaTeX3 does not use \verb|@| as ``letter'' for defining internal
macros. Instead, the symbols \verb|_| and \verb|:| are used in
internal macro names to provide structure. These extra letters are
used only between parts of a macro name (no strange vowel
replacement)\cite{expl3}.
\subsubsection{AUC\protect\TeX{} fontification}
\verb|\:| is only allowed in math mode; fontification is done there,
e.g. $a\:\:+b$ or
\begin{equation}
\int_1^2 \ln x \mathrm{d}x
\qquad
\int_1^2 \ln x \:\:\:\mathrm{d}x
\end{equation}
Regarding \LaTeX3, \verb|expl3| says:
\begin{quote}
3.2.1 Separating private and public material \\
Functions created by a module may either be ``public'' (documented
with a defined interface) or ``private'' (to be used only within
that module, and thus not formally documented). It is important
that only documented interfaces are used; [...] \\
To allow clear separation of these two cases, the following
convention is used. Private functions should be defined with
\verb|__| added to the beginning of the module name. Thus
\begin{quote}
\ttfamily \catcode`\_11\relax
\string\module_foo:nnn
\end{quote}
is a public function which should be documented while
\begin{quote}
\ttfamily \catcode`\_11\relax
\string\__module_foo:nnn
\end{quote}
is private to the module, and should not be used outside of that
module.
\end{quote}
%
Hopefully, this means that \verb|\__module_foo:nnn| macros will not be
used somewhere in the preamble of a \verb|.tex| file -- they should
appear only in a \verb|.dtx| file.
AUC\TeX{} provides a style file \verb|expl3.el| containing this code:
\begin{verbatim}
(defvar LaTeX-expl3-syntax-table
(let ((st (copy-syntax-table LaTeX-mode-syntax-table)))
;; Make _ and : symbol chars
(modify-syntax-entry ?\_ "_" st)
(modify-syntax-entry ?\: "_" st)
st))
\end{verbatim}
It changes the syntax for \verb|_| and \verb|:| from
\textsl{punctuation} to \textsl{symbol}. For public functions
mentioned above, this results in correct fontification in regular
\verb|.tex| files. For private functions, \verb|font-latex.el|
provides some code for doc\TeX{} mode to fontify them correctly.
\section{Math mode}
\subsection{\protect\LaTeX{} input}
In-line math is typeset with plain \TeX{}
\verb|$|\,\textsl{formula\_text}\,\verb|$| or \LaTeX{} shorthand
\verb|\(|\,\textsl{formula\_text}\,\verb|\)|, e.g. $(a+b)^2$ is equal
to \(a^2+2ab+b^2\).
\subsection{AUC\protect\TeX{} fontification}
AUC\TeX{} fontifies math with \texttt{font-latex-math-face}. There is
a bug report \#26630 for this issue: {\bfseries Text before, $(a+b)^2$
is equal to \(a^2+2ab+b^2\)!} First math expression is fontified
with
\begin{quote}
\verb|(font-latex-math-face font-latex-bold-face)|
\end{quote}
while the second with
\begin{quote}
\verb|(font-latex-bold-face font-latex-math-face)|
\end{quote}
\part{Environments}
\section{Math mode}
\subsection{\protect\LaTeX{} input}
Standard \LaTeX{} math environments are \verb|equation|,
\verb|displaymath| and others. \verb|amsmath| package provides
environments like \verb|align|, \verb|flalign| etc. These
environments do not take any arguments. Environments like
\verb|alignat|, \verb|xalignat| and \verb|xxalignat| take a mandatory
argument. Other math environments provided by packages like
\verb|empheq.sty| or \verb|breqn.sty| take an optional and/or
mandatory argument.
\subsection{AUC\protect\TeX{} fontification}
AUC\TeX{} fontifies the entire math content with
\texttt{font-latex-math-face}. The optional and mandatory argument(s)
should not be fontified. Spaces or line breaks are used in order to
distinguish argument from math content, i.e.
\begin{quote}
\verb|\begin{<mathenv>}[<opt-arg>]{<mand-arg>}|
\end{quote}
will be fontified differently than
\begin{quote}
\verb|\begin{<mathenv>}[<opt-arg>] {<math-content>}|
\end{quote}
or
\begin{quote}
\verb|\begin{<mathenv>} [<math-content>]{<math-content>}|
\end{quote}
The relevant functions is \verb|font-latex.el| are
\begin{quote}
\verb|font-latex-match-math-envII|\quad and \\
\verb|font-latex-extend-region-backwards-math-envII|
\end{quote}
\subsubsection{Standard \protect\LaTeX{}}
Examples taken from \cite{voss16}.
\begin{equation}
f(x)=\prod_{i=1}^{n}\left(i-\frac{1}{2i}\right)
\end{equation}
or
\begin{displaymath}
f(x)=\prod_{i=1}^{n}\left(i-\frac{1}{2i}\right)
\end{displaymath}
or
\[ f(x)=\prod_{i=1}^{n}\left(i-\frac{1}{2i}\right) \]
or
\begin{eqnarray*}
y & = & d\\
y & = & cx+d\\
y & = & bx^{2}+cx+d\\
y & = & ax^{3}+bx^{2}+cx+d
\end{eqnarray*}
\subsubsection{\texttt{amsmath} package}
Examples taken from \cite{voss16}.
\begin{align}
y &= d & z &= 1 \\
y &= cx+d & z &= x+1 \\
y_{12} &= bx^{2}+cx+d & z &= x^{2}+x+1\nonumber \\
y(x) &= ax^{3}+bx^{2}+cx+d & z &= x^{3}+x^{2}+x+1
\end{align}
or
\begin{alignat}{2}
y &= d & z &= 1 \\
y &= cx+d & z & =x+1 \\
y_{12} &= bx^{2}+cx+d & z &= x^{2}+x+1\nonumber \\
y(x) &= ax^{3}+bx^{2}+cx+d & z &= x^{3}+x^{2}+x+1
\end{alignat}
\subsubsection{\texttt{breqn} package}
Examples taken from \cite{breqn}:
\begin{dmath}
f(x)=\frac{1}{x} \condition{for $x\neq 0$}
\end{dmath}
or
\begin{dmath}[label={sna74}]
\frac{1}{6} \left(\sigma(k,h,0) +\frac{3(h-1)}{h}\right)
+\frac{1}{6} \left(\sigma(h,k,0) +\frac{3(k-1)}{k}\right)
=\frac{1}{6} \left(\frac{h}{k} +\frac{k}{h} +\frac{1}{hk}\right)
+\frac{1}{2} -\frac{1}{2h} -\frac{1}{2k},
\end{dmath}
or \newcommand\mx[1]{\begin{math}#1\end{math}}%
\begin{dseries}[frame]
\mx{v^{[2]} =(0,5,5,0,9,5,1,0)},
\mx{v^{[3]} =(0,9,11,9,10,12,0,1)}.
\end{dseries}
\begin{dgroup*}
\begin{dmath*}
H_1^3 = x_1 + x_2 + x_3
\end{dmath*},
\begin{dmath*}
H_2^2 = x_1^2 + x_1 x_2 + x_2^2 - q_1 - q_2
\end{dmath*},
\begin{dsuspend}
and
\end{dsuspend}
\begin{dmath*}
H_3^1 = x_1^3 - 2x_1 q_1 - x_2 q_1
\end{dmath*}.
\end{dgroup*}
\subsubsection{\texttt{empheq} package}
Examples taken from \cite{empheq}:
\begin{empheq}{align*}
a&= b \tag{*}\\
E&= mc^2 + \int_a^a x\,dx
\end{empheq}
or
\begin{empheq}{alignat=2}
a &= b &\quad c &= d \\
\text{this} &= \text{that} &\quad \mathit{fish}&\neq fish
\end{empheq}
or
\begin{empheq}[innerbox=\fbox,
left=L\Rightarrow]{align}
a&=b\\
E&=mc^2 + \int_a^a x\, dx
\end{empheq}
or
\begin{empheq}[
left={\parbox[c][\EmphEqdisplayheight+\EmphEqdisplaydepth][t]
{4.5cm}
{You may find this kind of description useful.}\enspace}%
]{align}
a&=\int_0^1 x\,dx +\frac{foo + bar}{baz}\\
E&= mc^2
\end{empheq}
\begin{thebibliography}{9}\raggedright
\bibitem{breqn} Downes, Michael J.; H\o gholm, Morten: The
\texttt{breqn} package. Released 2017/01/27.
\bibitem{empheq} H\o gholm, Morten; Madsen, Lars: The \texttt{empheq}
package. Released 2014/08/04.
\bibitem{expl3} The \LaTeX3 Project: The expl3 package and \LaTeX3
programming. Released 2017/04/01.
\bibitem{voss16} Vo\ss, Herbert: Mathematical Typesetting with
\LaTeX. TUG-Version 0.32, released 2016/11/08.
\end{thebibliography}
\end{document}
%%% Local Variables:
%%% mode: latex
%%% TeX-master: t
%%% End:

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\documentclass[a4paper]{article}
\usepackage{minted}
\usepackage{listings}
\usepackage{fancyvrb}
\begin{document}
This is a test document for fontification support of verbatim
\emph{macros} provided by \LaTeX{} and other packages within AUC\TeX.
As it is not part of \verb|ert|-tests, it does not have an
\verb|out|-counterpart. Parsing should be enabled when loading this
file, namely \verb|(setq TeX-parse-self t)| in \verb|.emacs|.
\section{The problem}
The \verb|verb| macro provided by vanilla \LaTeX{} does not receive
any special fontification within AUC\TeX. It is fontified with
\verb|font-latex-sedate-face|. Other \verb|verb| macros provided by
packages like \verb|listings|, \verb|minted| or \verb|fancyvrb| are
fontified with \verb|font-lock-keyword-face| as they are added to
\verb|textual| keyword class within \verb|font-latex.el|.
Next issue is that \verb|verb| macros from modern packages take an
optional argument or even a mandatory argument before the
\verb|verbatim| content. This issue was not addressed in
\verb|font-latex.el|.
\section{The solution}
\subsection{Vanilla \LaTeX}
The issue with fontification of \verb|verb| macro is solved in
\verb|font-latex.el| by adding \verb|("verb" "*")| to
\verb|`font-latex-built-in-keyword-classes'|. This construct
fontifies only the macro itself---the argument is left out for
syntactic fontification.
\subsection{Optional argument}
This issue can be fixed in \verb|font-latex.el| by extending the
regexp for \verb|verb| macros with delimiters/braces in
\verb|`font-latex-set-syntactic-keywords'| with:
\begin{quote}
\verb|"\\(?:\\[[^][]*\\(?:\\[[^][]*\\][^][]*\\)*\\]\\)?"|
\end{quote}
The same line is used for matching optional arguments in verbatim
environments.
\section{The result}
\subsection{Vanilla \LaTeX}
Some text \verb|verb input|, % comment
$a+b$ and \verb*"verb input" % comment
\subsection{listings package}
Some text \lstinline|verb input with delims|, % comment
$a+b$ \lstinline[showspaces,basicstyle=\ttfamily]/verb input with delims/, % comment
%
\lstinline[%
basicstyle=\sffamily]!multiline in opt. arg!, % comment
%
\lstinline[%
basicstyle=\sffamily
]-multiline in opt. arg- % comment
Some text \lstinline{verb input with braces}, % comment
$a+b$ \lstinline[showspaces]{verb input with braces}, % comment
%
\lstinline[%
basicstyle=\sffamily]{multiline in opt. arg}, % comment
%
\lstinline[
basicstyle=\sffamily
]{multiline in opt. arg} % comment
\subsection{minted package}
Some text \mint{text}|verb input| % comment
$a+b$ \mint[showspaces]{text}/verb input/ % comment
Some text \mint[
showspaces
]{text}!verb input! % comment
Some text \mint[showspaces]{%
text%
}+verb input+ % comment
\newmint{text}{showspaces} %
\text|verb input| and \text[showspaces=false]|verb input| % comment
\newmint[mytext]{text}{showspaces} %
\mytext|verb input| and \mytext[%
showspaces=false
]|verb input| % comment
Some text \mintinline{text}|verb input| % comment
$a+b$ \mintinline[showspaces]{text}|verb input| % comment
Some text \mintinline[
showspaces
]{text}|verb input| % comment
Some text \mintinline[showspaces]{%
text%
}|verb input| % comment
\newmintinline{text}{showspaces} %
\textinline|verb input with delims| and \textinline[%
showspaces=false
]|verb input with delims| % comment
\textinline{verb input with braces} and \textinline[%
showspaces=false
]{verb input with braces} % comment
\newmintinline[mytextinline]{text}{showspaces} %
\mytextinline|verb input with delims| and \mytextinline[%
showspaces=false
]|verb input with delims|
\mytextinline{verb input with braces} and \mytextinline[%
showspaces=false
]{verb input with braces}
\subsection{fancyvrb package}
Some text \Verb|verb input| and % comment
\Verb[showspaces]|verb input| and \Verb[
showspaces
]|verb input|
Some text \Verb!verb input! and % comment
\Verb[showspaces]"verb input" and \Verb[
showspaces
]#verb input#
\end{document}
%%% Local Variables:
%%% mode: latex
%%% TeX-master: t
%%% TeX-command-extra-options: "-shell-escape"
%%% End:

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Lorem ipsum dolor sit amet, consectetur adipisci elit, sed eiusmod \(0 = 1\) tempor incidunt ut $a^{2} + b^{2} = c^{2}$ labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrum exercitationem ullam corporis suscipit laboriosam, nisi ut aliquid ex ea commodi consequatur.
\begin{tabular}{| l | l | l | l |}
Lorem ipsum dolor sit amet, consectetur adipisci & Lorem ipsum dolor sit amet, consectetur adipisci & Lorem ipsum dolor sit amet, consectetur adipisci & Lorem ipsum dolor sit amet, consectetur adipisci
\end{tabular}
% Test for unambiguousness of macros starting a paragraph. E.g.
% caption vs. captionsetup
Lorem ipsum dolor sit amet, consectetur adipisci,
lorem ipsum dolor
\captionsetup{key=val}
sit amet, consectetur adipisci
Lorem ipsum dolor sit amet, consectetur adipisci,
lorem ipsum dolor
\caption{key=val}
sit amet, consectetur adipisci
% par vs. parencite
Lorem ipsum dolor sit amet, consectetur adipisci,
lorem ipsum dolor
\parencite{key}
sit amet, consectetur adipisci
Lorem ipsum dolor sit amet, consectetur adipisci,
lorem ipsum dolor
\par
sit amet, consectetur adipisci

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Lorem ipsum dolor sit amet, consectetur adipisci elit, sed eiusmod
\(0 = 1\) tempor incidunt ut $a^{2} + b^{2} = c^{2}$ labore et dolore
magna aliqua. Ut enim ad minim veniam, quis nostrum exercitationem
ullam corporis suscipit laboriosam, nisi ut aliquid ex ea commodi
consequatur.
\begin{tabular}{| l | l | l | l |}
Lorem ipsum dolor sit amet, consectetur adipisci & Lorem ipsum dolor sit amet, consectetur adipisci & Lorem ipsum dolor sit amet, consectetur adipisci & Lorem ipsum dolor sit amet, consectetur adipisci
\end{tabular}
% Test for unambiguousness of macros starting a paragraph. E.g.
% caption vs. captionsetup
Lorem ipsum dolor sit amet, consectetur adipisci, lorem ipsum dolor
\captionsetup{key=val} sit amet, consectetur adipisci
Lorem ipsum dolor sit amet, consectetur adipisci, lorem ipsum dolor
\caption{key=val}
sit amet, consectetur adipisci
% par vs. parencite
Lorem ipsum dolor sit amet, consectetur adipisci, lorem ipsum dolor
\parencite{key} sit amet, consectetur adipisci
Lorem ipsum dolor sit amet, consectetur adipisci, lorem ipsum dolor
\par
sit amet, consectetur adipisci

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;;; latex-test.el --- tests for LaTeX mode
;; Copyright (C) 2014--2017 Free Software Foundation, Inc.
;; This file is part of AUCTeX.
;; AUCTeX is free software; you can redistribute it and/or modify it
;; under the terms of the GNU General Public License as published by
;; the Free Software Foundation; either version 3, or (at your option)
;; any later version.
;; AUCTeX is distributed in the hope that it will be useful, but
;; WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
;; General Public License for more details.
;; You should have received a copy of the GNU General Public License
;; along with AUCTeX; see the file COPYING. If not, write to the Free
;; Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
;; 02110-1301, USA.
;;; Code:
(require 'ert)
(require 'latex)
(AUCTeX-set-ert-path
'LaTeX-indent-tabular-test/in
"tabular-in.tex"
'LaTeX-indent-tabular-test/out
"tabular-out.tex"
'LaTeX-filling/in
"latex-filling-in.tex"
'LaTeX-filling/out
"latex-filling-out.tex"
'LaTeX-math-indent/in
"math-indent-in.tex"
'LaTeX-math-indent/out
"math-indent-out.tex"
'tabular-count-ampersands/in
"tabular-count-ampersands-in.tex"
'tabular-count-ampersands/out
"tabular-count-ampersands-out.tex")
;; Test for detecting \& in a table cell added; see
;; https://debbugs.gnu.org/cgi/bugreport.cgi?bug=26010
;; Test for missing & in row added; see
;; https://debbugs.gnu.org/cgi/bugreport.cgi?bug=26032
(ert-deftest LaTeX-indent-tabular ()
(should (string=
(with-temp-buffer
(insert-file-contents LaTeX-indent-tabular-test/in)
(LaTeX-mode)
(indent-region (point-min) (point-max))
(buffer-string))
(with-temp-buffer
(insert-file-contents LaTeX-indent-tabular-test/out)
(buffer-string)))))
;; Another test for indentation, but for math mode, see
;; https://debbugs.gnu.org/cgi/bugreport.cgi?bug=20227 Let's keep those tests
;; separated so it would be easier to find the culprit of a future failure.
(ert-deftest LaTeX-math-indent ()
(should (string=
(with-temp-buffer
(insert-file-contents LaTeX-math-indent/in)
(LaTeX-mode)
(indent-region (point-min) (point-max))
(buffer-string))
(with-temp-buffer
(insert-file-contents LaTeX-math-indent/out)
(buffer-string)))))
;; Test LaTeX code with math modes is indented as expected. This has mostly to
;; do with the value of `LaTeX-fill-break-at-separators' and how
;; `LaTeX-fill-move-to-break-point' handles it. If the test fails, try to look
;; there. The second part of the test looks for unambiguousness of
;; macros starting a paragraph
;; (http://lists.gnu.org/archive/html/auctex/2017-03/msg00009.html)
(ert-deftest LaTeX-filling ()
(should (string=
(with-temp-buffer
(insert-file-contents LaTeX-filling/in)
(LaTeX-mode)
(let ((fill-column 70))
(fill-paragraph)
(let ((cmds '("captionsetup" "caption"
"parencite" "par")))
(dolist (cmd cmds)
(search-forward (concat "\\" cmd))
(save-excursion
(end-of-line 0)
(fill-paragraph)))))
(buffer-string))
(with-temp-buffer
(insert-file-contents LaTeX-filling/out)
(buffer-string)))))
;; Test for bug#19281 (https://debbugs.gnu.org/cgi/bugreport.cgi?bug=19281):
;; make sure AUCTeX is able to insert and modify an environment containing a
;; TeX-esc and braces in its name.
(ert-deftest LaTeX-change-environment-with-esc ()
(should (string=
(with-temp-buffer
(LaTeX-mode)
(LaTeX-insert-environment (concat TeX-esc "foo{bar}"))
(LaTeX-modify-environment "foobar")
(buffer-string))
(with-temp-buffer
(LaTeX-mode)
(LaTeX-insert-environment "foobar")
(buffer-string)))))
;; Test for inserting &'s with `M-RET' in various tabular environment.
;; Following styles are loaded: tabularx, tabulary, longtable,
;; dcolumn, siunitx
(ert-deftest LaTeX-count-ampersands-inserted-in-tabular ()
(should (string=
(with-temp-buffer
(insert-file-contents tabular-count-ampersands/in)
(setq TeX-parse-self t)
(LaTeX-mode)
(goto-char (point-min))
;; Do not ask for opt. argument in (TeX-insert-macro "\\"):
(let ((TeX-insert-macro-default-style 'mandatory-args-only))
(while (search-forward "LaTeX-insert-item" nil t)
(LaTeX-insert-item)))
(buffer-string))
(with-temp-buffer
(insert-file-contents tabular-count-ampersands/out)
(LaTeX-mode)
(buffer-string)))))
(ert-deftest LaTeX-addbibresource ()
"Check parsing of bibliography files added with addbibresource.
In particular, make sure dots are treated correctly and only the
last extension is stripped."
(should
(equal
(with-temp-buffer
(insert "\\addbibresource{../foo-1.bar_2.qux3.ext}")
(LaTeX-mode)
(let ((TeX-parse-self t))
(TeX-update-style t))
(LaTeX-bibliography-list))
'(("../foo-1.bar_2.qux3")))))
(ert-deftest LaTeX-auto-class-regexp ()
"Check parsing optional argument with comment correctly.
Test against RequirePackage."
(with-temp-buffer
(insert "\\RequirePackage[
backend=biber % here is a comment
]{biblatex}
")
(latex-mode)
(let ((TeX-parse-self t))
(TeX-update-style t))
(should (member "biblatex" (TeX-style-list)))
(should (LaTeX-provided-package-options-member
"biblatex" "backend=biber"))))
;;; latex-test.el ends here

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\[
x
\]
\[
\begin{split}
x &= y \\
y &= z
\end{split}
\]
\begin{itemize}
\item Some text here
\[
x
\]
\end{itemize}

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\[
x
\]
\[
\begin{split}
x &= y \\
y &= z
\end{split}
\]
\begin{itemize}
\item Some text here
\[
x
\]
\end{itemize}

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\documentclass{article}
\usepackage{tabularx,tabulary,longtable,dcolumn,siunitx}
\begin{document}
Standard LaTeX tabular:
\begin{tabular}[t]{llll}
1 & 2 & 3 & LaTeX-insert-item
\end{tabular}
LaTeX tabular with *-operator:
\begin{tabular}[t]{*{3}{l}r}
1 & 2 & 3 & LaTeX-insert-item
\end{tabular}
\begin{tabular}{*{3}{l}>{\tiny\hfill}l<{\hfill}}
1 & 2 & 3 & LaTeX-insert-item
\end{tabular}
\begin{tabular}[t]{*{3}{lc}r}
1 & 2 & 3 & 4 & 5 & 6 & LaTeX-insert-item
\end{tabular}
\begin{tabular}[t]{*{3}{lc*{2}{l}} r}
1 & 2 & 3 & 4 & 5 & 6 & 7 & 8 & 9 & 10 & 11 & 12 & LaTeX-insert-item
\end{tabular}
Standard LaTeX tabular*:
\begin{tabular*}{1.0\linewidth}[t]{@{}lllr@{}}
1 & 2 & 3 & LaTeX-insert-item
\end{tabular*}
\begin{tabular*}{1.0\linewidth}[t]{@{}*{3}{|l}|r|}
1 & 2 & 3 & LaTeX-insert-item
\end{tabular*}
tabularx:
\begin{tabularx}{1.0\linewidth}{llX}
1 & 2 & LaTeX-insert-item
\end{tabularx}
\begin{tabularx}{1.0\linewidth}[t]{@{}>{\tiny\hfill}l<{\hfill}lX@{}}
1 & 2 & LaTeX-insert-item
\end{tabularx}
\begin{tabularx}{1.0\linewidth}[t]{*{3}{|>{\tiny\hfill}X<{\hfill}}l}
1 & 2 & 3 & LaTeX-insert-item
\end{tabularx}
longtable:
\begin{longtable}[l]{llr}
\caption{Some caption}\\
1 & 2 & LaTeX-insert-item
\end{longtable}
\begin{longtable}[c]{*{3}{l}r}
\caption{Some caption}\\
1 & 2 & 3 & LaTeX-insert-item
\end{longtable}
\begin{longtable}[r]{*{3}{lc*{2}{l}} r}
\caption{Some caption}\\
1 & 2 & 3 & 4 & 5 & 6 & 7 & 8 & 9 & 10 & 11 & 12 & LaTeX-insert-item
\end{longtable}
dcolumn:
\begin{tabular}{D{,}{,}{2}D{,}{,}{2}D{,}{,}{2}}
1 & 2 & LaTeX-insert-item
\end{tabular}
\begin{tabular}{*{3}{D{,}{,}{2}}}
1 & 2 & LaTeX-insert-item
\end{tabular}
siunitx:
\begin{tabular}{%
s
S[table-number-alignment = center]
s[table-number-alignment = left]
S[table-number-alignment = right]
}
1 & 2 & 3 & LaTeX-insert-item
\end{tabular}
\end{document}

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\documentclass{article}
\usepackage{tabularx,tabulary,longtable,dcolumn,siunitx}
\begin{document}
Standard LaTeX tabular:
\begin{tabular}[t]{llll}
1 & 2 & 3 & LaTeX-insert-item \\
&&&
\end{tabular}
LaTeX tabular with *-operator:
\begin{tabular}[t]{*{3}{l}r}
1 & 2 & 3 & LaTeX-insert-item \\
&&&
\end{tabular}
\begin{tabular}{*{3}{l}>{\tiny\hfill}l<{\hfill}}
1 & 2 & 3 & LaTeX-insert-item \\
&&&
\end{tabular}
\begin{tabular}[t]{*{3}{lc}r}
1 & 2 & 3 & 4 & 5 & 6 & LaTeX-insert-item \\
&&&&&&
\end{tabular}
\begin{tabular}[t]{*{3}{lc*{2}{l}} r}
1 & 2 & 3 & 4 & 5 & 6 & 7 & 8 & 9 & 10 & 11 & 12 & LaTeX-insert-item \\
&&&&&&&&&&&&
\end{tabular}
Standard LaTeX tabular*:
\begin{tabular*}{1.0\linewidth}[t]{@{}lllr@{}}
1 & 2 & 3 & LaTeX-insert-item \\
&&&
\end{tabular*}
\begin{tabular*}{1.0\linewidth}[t]{@{}*{3}{|l}|r|}
1 & 2 & 3 & LaTeX-insert-item \\
&&&
\end{tabular*}
tabularx:
\begin{tabularx}{1.0\linewidth}{llX}
1 & 2 & LaTeX-insert-item \\
&&
\end{tabularx}
\begin{tabularx}{1.0\linewidth}[t]{@{}>{\tiny\hfill}l<{\hfill}lX@{}}
1 & 2 & LaTeX-insert-item \\
&&
\end{tabularx}
\begin{tabularx}{1.0\linewidth}[t]{*{3}{|>{\tiny\hfill}X<{\hfill}}l}
1 & 2 & 3 & LaTeX-insert-item \\
&&&
\end{tabularx}
longtable:
\begin{longtable}[l]{llr}
\caption{Some caption}\\
1 & 2 & LaTeX-insert-item \\
&&
\end{longtable}
\begin{longtable}[c]{*{3}{l}r}
\caption{Some caption}\\
1 & 2 & 3 & LaTeX-insert-item \\
&&&
\end{longtable}
\begin{longtable}[r]{*{3}{lc*{2}{l}} r}
\caption{Some caption}\\
1 & 2 & 3 & 4 & 5 & 6 & 7 & 8 & 9 & 10 & 11 & 12 & LaTeX-insert-item \\
&&&&&&&&&&&&
\end{longtable}
dcolumn:
\begin{tabular}{D{,}{,}{2}D{,}{,}{2}D{,}{,}{2}}
1 & 2 & LaTeX-insert-item \\
&&
\end{tabular}
\begin{tabular}{*{3}{D{,}{,}{2}}}
1 & 2 & LaTeX-insert-item \\
&&
\end{tabular}
siunitx:
\begin{tabular}{%
s
S[table-number-alignment = center]
s[table-number-alignment = left]
S[table-number-alignment = right]
}
1 & 2 & 3 & LaTeX-insert-item \\
&&&
\end{tabular}
\end{document}

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\documentclass{article}
\begin{document}
\begin{tabular}{llll}
Lorem ipsum dolor & sit amet, ei mei
paulo tation honestatis,
intellegam & accommodare ne vim, ut
mel solum putant
atomorum. Posse & dolores has ut,\\
prompta & disputando & ne mel, ne
viderer ceteros
vel. & No petentium
\\
reformidans mel. & Quo no sale
natum, cu
pericula & deterruisset
usu. Nec & bonorum detracto\\
detraxit & no. & Ne sea doming & deserunt.
\end{tabular}
\begin{tabular}{ll}
1 & 2 & 3
\\
& 4 & 5
\\
6 & 7
& 8\\
9 &
10
& 11
\end{tabular}
\begin{align}
1 & 2
3 & 4
5\\
6 &
7
8 &
9
\end{align}
% Next table tests filling with a control symbol \& inside a cell; the
% function `LaTeX-indent-tabular' now (March 2017) detects \&, see:
% https://debbugs.gnu.org/cgi/bugreport.cgi?bug=26010
\begin{tabular}{llll}
Lorem ipsum dolor & sit amet, ei mei \&
paulo tation honestatis, \&
intellegam & accommodare ne vim, ut
mel solum putant
atomorum. Posse & dolores has ut,\\
prompta & disputando & ne mel, ne
\& viderer ceteros
vel. & No petentium
\end{tabular}
% Next tables test filling when & (column separator) character is
% missing in a row; the function `LaTeX-hanging-ampersand-position'
% now (March 2017) detects this and has a fallback, see:
% https://debbugs.gnu.org/cgi/bugreport.cgi?bug=26032
\begin{tabular}{llll}
\multicolumn{4}{c}{Lorem ipsum dolor sit amet, ei mei} \\
& paulo tation honestatis,
intellegam accommodare ne vim, ut \\
& mel solum putant atomorum. Posse & dolores has ut, \\
prompta & disputando & ne mel, ne
\& viderer ceteros vel. \\
& No petentium
\end{tabular}
\begin{table}[tbp]
\begin{tabular}{llll}
\multicolumn{4}{c}{Lorem ipsum dolor sit amet, ei mei} \\
& paulo tation honestatis,
intellegam accommodare ne vim, ut \\
& mel solum putant atomorum. Posse & dolores has ut, \\
prompta & disputando & ne mel, ne
\& viderer ceteros vel. \\
& No petentium
\end{tabular}
\end{table}
\end{document}

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\documentclass{article}
\begin{document}
\begin{tabular}{llll}
Lorem ipsum dolor & sit amet, ei mei
paulo tation honestatis,
intellegam & accommodare ne vim, ut
mel solum putant
atomorum. Posse & dolores has ut,\\
prompta & disputando & ne mel, ne
viderer ceteros
vel. & No petentium
\\
reformidans mel. & Quo no sale
natum, cu
pericula & deterruisset
usu. Nec & bonorum detracto\\
detraxit & no. & Ne sea doming & deserunt.
\end{tabular}
\begin{tabular}{ll}
1 & 2 & 3
\\
& 4 & 5
\\
6 & 7
& 8\\
9 &
10
& 11
\end{tabular}
\begin{align}
1 & 2
3 & 4
5\\
6 &
7
8 &
9
\end{align}
% Next table tests filling with a control symbol \& inside a cell; the
% function `LaTeX-indent-tabular' now (March 2017) detects \&, see:
% https://debbugs.gnu.org/cgi/bugreport.cgi?bug=26010
\begin{tabular}{llll}
Lorem ipsum dolor & sit amet, ei mei \&
paulo tation honestatis, \&
intellegam & accommodare ne vim, ut
mel solum putant
atomorum. Posse & dolores has ut,\\
prompta & disputando & ne mel, ne
\& viderer ceteros
vel. & No petentium
\end{tabular}
% Next tables test filling when & (column separator) character is
% missing in a row; the function `LaTeX-hanging-ampersand-position'
% now (March 2017) detects this and has a fallback, see:
% https://debbugs.gnu.org/cgi/bugreport.cgi?bug=26032
\begin{tabular}{llll}
\multicolumn{4}{c}{Lorem ipsum dolor sit amet, ei mei} \\
& paulo tation honestatis,
intellegam accommodare ne vim, ut \\
& mel solum putant atomorum. Posse & dolores has ut, \\
prompta & disputando & ne mel, ne
\& viderer ceteros vel. \\
& No petentium
\end{tabular}
\begin{table}[tbp]
\begin{tabular}{llll}
\multicolumn{4}{c}{Lorem ipsum dolor sit amet, ei mei} \\
& paulo tation honestatis,
intellegam accommodare ne vim, ut \\
& mel solum putant atomorum. Posse & dolores has ut, \\
prompta & disputando & ne mel, ne
\& viderer ceteros vel. \\
& No petentium
\end{tabular}
\end{table}
\end{document}