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Questions tagged [parsing]

{parsing} is the process of analysing a string of symbols, either in natural or computer language.

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Detect \end of an environment

I'm trying to create a macro that grabs everything till the end of the current environment and parses it. At first, I just want to put ! right after my macro and another one ! before the end of ...
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1 vote
1 answer
46 views

How to parse an itemized list the way moodle.sty does

A simple moodle.sty database contains code like that: \begin{multi}{Name of the question} Text of the question \item first answer \item secon answer \item* the starred is the ...
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2 votes
2 answers
60 views

How to gobble a character, if present

I would like to do the folloging: Given a (complicated) string/macro \String, if it starts with * I just remove it, otherwise I do nothing. So far I tryed \def\gobbleast *{}% then \gobbleast \String ...
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Is there a way to extract math from a pdf in LaTeX format using SESHAT?

So I've been tasked with using SESHAT to extract the math problems from a large pdf into latex format, but seshat requires an InkML or SCGink file type as it's input. Is there a way I can convert pdf ...
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2 votes
1 answer
51 views

Parse subscript and superscript in command

I am using quite a lot of notation in my text. Thus, I decided to write some commands such as: \newcommand{\struct}[1]{\mathsf{#1}} The typical use is as follows: Let $(\struct{A}_n)$ be a sequence ...
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Coloring numbers outside string and variables using lstlisting and parsing don't work as expected. Need Help to fix with PDFLaTeX

I am writing my thesis and i need to put extract of code into it. Having developed all my C# code in Visual Studio, I would like to have more or less the same colors, so I have taken different ...
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7 votes
3 answers
208 views

Are there any LaTeX commands (including in packages) where the argument will be in math/text mode based on context?

As I work on the parser for finl, I'm contemplating how I'm dealing with command parameters and wondering if my current setup is sufficient. Right now, a parameter has a type which would either be ...
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3 votes
2 answers
108 views

Parse list of tuples

I want to pass a list/sequence of "tuples" to a macro, like this: \foo { (value11 value12 value13) (value21 value22 value23) (value31 value32 value33) (value41 value42 ...
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1 vote
2 answers
94 views

Gobble the next char if it is whitespace or tilde

I want this macro to gobble the next character in the input stream only if it is whitespace (according to the char code) or it's the tilde character (i.e., a non-breaking space). My current attempt to ...
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  • 768
4 votes
3 answers
100 views

How to absorb the content of the page into a variable?

This is what I'm trying to do: \documentclass{article} \begin{document} \start Hello, world! \stop \print % here! \end{document} I'm expecting Hello, world! to be printed twice. The second time by ...
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6 votes
3 answers
274 views

Split string into part by char position

Explanations I format a moroccan RIB (Relevé d’identité bancaire for “Bank account number”) to display it as a nice rendering. I need to take each part of the RIB to embrace it with a specific label. ...
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1 vote
1 answer
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Macro delimited lists

Floats use macro delimited lists like \@freelist. Source2e shows them using macros like \@next and \@cons without showing the definitions. The idea of having self parsing lists is intriguing and ...
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1 vote
2 answers
93 views

Automatically composing documents from multiple text files which are not LaTeX formatted?

I'm looking for a way to create a songbook out of individual song files. Each song file is a self-contained block of text data consisting of: Song name Song author Some details (optional) Lyrics with ...
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9 votes
4 answers
467 views

LaTeX3 - Parsing an argument to apply specific macros

In the following code, I would like to parse the argument of \parseanduse such as to "achieve" the examples shown. Each time a o is met, the following integer should be used to call the ...
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1 vote
1 answer
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ConTeXt: Typeset XML attribute containing newlines

Background A user can provide their address information in a text area, separating lines by pressing Enter. An XML document is generated, which replaces the new line character with \n, such as in the ...
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1 vote
1 answer
128 views

Parsing optional argument from \newenvironment to \newmdenv

I'd like to parse an optional variable from a custom \newenvironment{example} to an mdframed environment \mytextbox nested in the example environment. What I'd like to achieve is something like ...
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5 votes
1 answer
121 views

Parsing a mix of plain text and commands

I am trying to implement a command that parses some expression that can be a mix of plain text, commands with their (any number of) arguments, or even -- if I understood that correctly -- unexpandable ...
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7 votes
2 answers
240 views

LaTeX3: Elegant way to forward-reference a counter with a "future" value

I'd like to do, pseudo-code, the following: \begin{pointtracker}{Advanced Geology} \begin{itemize} \item Count the fingers on your left hand. Are there more than 9? \addpoints{1} \item Draw ...
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1 vote
1 answer
40 views

lstlisting: Unexpected newline/missing background color after trailing space in escape section

I'll start with a minimum failing example: \documentclass{article} \usepackage{listings} \usepackage{color} \lstdefinelanguage{x}{ escapechar={!} } \lstset{language=x, breaklines=true, ...
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1 vote
1 answer
429 views

Parsing issues with resume written in LaTeX [closed]

I've written my resume in Overleaf and downloaded it as a PDF to submit to job applications. For some job applications it works but for others I'm told there is a parsing error (i.e. their automated ...
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5 votes
1 answer
149 views

Automatic text highlighting based on a dictionary

I would like to automatically highlight parts of a running text, based on whether the word is in a predefined dictionary, or not. Something along the lines of... \documentclass{article} \mydictionary{...
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0 votes
2 answers
77 views

Weird 'ProvidesPackage' vs 'newenvironment' macro expansion

currently improving an existing package ('ditaa', based on ditaa0_9.jar) to add support for svg (implemented in ditaa-0.11.0-standalone.jar) yet I'm facing strange macro definition/expansion. ...
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11 votes
1 answer
4k views

is there a python module for parsing LaTeX?

I am looking to write python programs that modify LaTeX source files. To do this I would like to have a basic parser in python that can reliably read and write LaTeX files while maintaining the tree. ...
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1 vote
0 answers
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Macro to change the extension of filename

I would like to have a macro to change the extension of a file name. For example, my macro needs to take an argument like Figures/Fig.xxx and return me Figures/Fig0.yyy. I found a solution in Extract ...
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3 votes
2 answers
110 views

Convert \input to number

I'm reading several txt-files from disk and I want to do some simple calculations on them and be able to print them on the page. Basically I have: \newcommand\getinput[2]{ \immediate\write18{do-...
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  • 157
6 votes
4 answers
446 views

What LaTeX macros cannot accept a group as an argument?

I am working on a LaTeX pretty printer that parses a LaTeX document and then re-renders the source. (I know that this is not possible in all cases, but it should be possible a lot of the time.) In ...
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0 votes
0 answers
28 views

Automatically elaborate an external table's data

I have to create a serie of sheets with LaTeX using informations from a LibreOffice table (but I can convert it in other formats if needed). The problem is, the table is some hundreds rows long, so it ...
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6 votes
1 answer
303 views

Why does LaTeX parse square brackets differently than curly braces?

In this comment (copied below without effort to preserve formatting): It may be worth pointing out why this happens. The [ and ] bracketing of optional arguments in LaTeX isn't as robust as the { .....
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2 votes
1 answer
272 views

How to escape "and" as list delimiter in bibtex/biblatex?

In my BibLaTeX manual, it says: Literal lists are parsed and split up into the individual items at the and delimiter but not dissected further. Literal lists may be truncated in the bib file with ...
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3 votes
3 answers
183 views

Parse sentence and split into parts

I would like to generate titles for my documents that look like this: \documentclass{article} \usepackage{tikz} \begin{document} \noindent \colorbox{red}{\expandafter\MakeUppercase\expandafter{\Huge ...
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3 votes
2 answers
250 views

In LaTeX3, what is the best data type for storing, parsing and outputting free user input?

I'm working on a mini-parser that takes free user input and interprets certain inputs as commands. For example, the parser interprets + as \oplus or [ as "start a pre-configured array with the bracket ...
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0 votes
1 answer
103 views

Combining texmate header and xskak notation

I tried to alter the PGN2LaTeX3 in that manner that it should create headers in my book, however I failed to do it. for example, some pgn2latex_out.tex result: \newgame \resetPgnTags \def\Site{} \...
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0 votes
0 answers
39 views

Output position in sourcefile of a macro expansion

Suppose I have a custom macro defined with \newcommand (no fancy parsing going on). For simplicity assume \newcommand{\mymacro}[1]{#1} Is there a way to redefine the macro so that, every time the ...
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  • 14.6k
2 votes
1 answer
53 views

Build a shortcut for string to be used as an argument later

I need to pass the result of a macro as a string to another macro (I'm using xparse). Here is a minimum working example: \documentclass{minimal} \usepackage{xparse} \NewDocumentCommand{\...
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27 votes
3 answers
1k views

Unbalanced dollar signs

I'm curious: why do the following two examples behave differently? Example 1: (Works, displays xyz in displaymath mode.) \newcommand\weird{$$xyz$} \weird$ Example 2: (Error, missing $ inserted.) \...
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  • 477
2 votes
1 answer
80 views

Parse standard balanced group within verbatim context

Say I want to write a custom parser which reads characters in a verbatim context, where the parser argument should be split into several kinds of tokens: Ordinary characters, i.e. all characters ...
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2 votes
2 answers
176 views

Automatically remove \ifthenelse

Let's assume that you have a single LaTeX source file that can compile two arts of documents: a main conference paper and its extended long version. Inside, you use \ifthenese to produce the two ...
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0 votes
0 answers
166 views

Parse all equations in eps file

When I draw figures with a vector graphic program I can export them as .eps files. I know it is possible to use psfrag to replace given text in the eps file with another text which is then parsed in ...
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  • 101
2 votes
1 answer
88 views

Efficiency of xstring (2e) vs. xparse (l3) in simple parsing

I understand string processing can be done on either LaTeX2e using xstring and expl3 using xparse (originally based on the 2013 thread "Tokenizing and parsing") I will be running a relatively simple ...
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4 votes
1 answer
250 views

Nested maths mode - Latex parsing

I needed a tiny bullet and found this solution : $\vcenter{\hbox{\tiny$\bullet$}}$ Howover, I don't understand how latex interpret / parse this formula. \vcenter is math mode \hbox and \tiny are ...
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10 votes
1 answer
249 views

How do I define a new TeX register with arguments in LuaTeX?

Some time ago I tried to implement the \pdfadjustinterwordglue from pdfTeX in LuaTeX using a callback. Getting the callback to work is pretty simple, but there is another major problem in the way ...
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1 vote
0 answers
59 views

How to iterate over tags in a latex file?

I am working on a problem where I have been given a file and I have to find all the cells in all the tables in the latex document(Basically I have to make a border for all the cells. Currently, I am ...
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1 vote
0 answers
281 views

Split LaTeX paragraphs into new lines after each sentence - re-formatting tool for VCS

I think this question has relevance and overlap on both stack-overflow and TeX forums, but suspect the TeX community might be better suited, so have posted it here. My text/tex files need ...
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1 vote
1 answer
196 views

In what ways can one write a parser in plain TeX or packageless LaTeX?

I want to write my own document class as a literate program with as minimal of a dependency tree as possible as an exercise to test my ability. I've implemented a stable foreach loop by shredding an ...
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0 votes
1 answer
62 views

How much negative space needed? To recognizably remove a space by letting something be added? For macros whose argument is another macro?

Suppose that one has brea + (notice the space at the end). brea + is not printed yet. A macro \m{brea +} will replace + with \added ... how then does one define added, imagine it prints a d but only ...
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4 votes
3 answers
194 views

Extract more than nine arguments that occur periodically in a sentence to use in macros in order to typset

What is a good way to write a definition of the type \fun below \fun{abc1 EDF1 xyz1 efg jkl abc2 EDF2 xyz2 efg jkl abc3 EDF3 xyz3 efg jkl abc4 EDF2 xyz4 ...} where the number of arguments is not ...
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1 vote
0 answers
38 views

Latex3 replacement for \afterassigment in parsing code to grab integer

When parsing expressions, one way that I like to grab an integer delimited on the end by any nonexpandable token that is not a digit is using a count register and \afterassignment. So the code looks ...
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3 votes
3 answers
223 views

Check whether String represents valid number for PGF

I am searching for a reliable way to determine whether a String can be fed into \pgfmathprintnumber. I used to use the \IfDecimal from the xstring package which works fine for things like 3.14 and ...
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  • 2,323
2 votes
1 answer
294 views

Iterating over characters of a string during a for each loop in a Tikz picture

I am trying to make a command that renders a Tikz picture in which there is a square surrounded by a number of smaller squares on the boundary. The first parameter defines the size of the picture, the ...
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7 votes
2 answers
3k views

Parser for pure LaTeX

Is it possible to create a parser for pure LaTeX (no plain TeX, no TeX primitive) without using any TeX engine that supports total LaTeX? I know about an iOS app to create and typeset LaTeX and I don'...
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