A high-level package from the LaTeX3 project that provides a powerful mechanism for defining new commands with various types of arguments.

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9
votes
1answer
543 views

Wrapping \cmidrule in a macro

In my earlier solution for Multivariate polynomial long division using LaTeX I had wrapped \cmidrule in a macro as its syntax alowing to shorten the end points was not standard: ...
4
votes
1answer
182 views

Weird xparse issue involving splitlist

\DeclareDocumentCommand\test{o}{\IfNoValueOrEmptyTF{#1}{No value or empty!}{-#1-}} works, but when we try to use a split list the NoValueOrEmpty test fails: \DeclareDocumentCommand\test{ > { ...
7
votes
3answers
662 views

xparse empty arguments

I have defined a command using xparse as \DeclareDocumentCommand\mymacro{o o o} and I want to call it with various numbers of arguments (up to 3) \mymacro, \mymacro[test][two], \mymacro[][][test] ...
8
votes
1answer
177 views

On pitfalls of robust commands

These days, I’m more and more defining robust commands, e.g., using \newrobustcmd (etoolbox package) or \NewDocumentCommand (xparse package). Robust commands seem advantageous to me in many respects ...
1
vote
0answers
189 views

how to create a fully-expandable environment [closed]

I know DeclareDocumentCommand from the package xparse. I am wondering if there is a version for environment ? I could also imagine a trick based on : declare the environment with ...
10
votes
2answers
756 views

Why using a backslash in command definitions?

I want to know the reasoning behind the (La)TeX inferface for defining commands with leading backslashes. I see why a backslash has to be used to call (expand) a command (macro), but I do not ...
5
votes
2answers
513 views

Passing multiple arguments from ProcessList (xparse) to a macro. Result to be used in tabular

I am making a macro that will take user input of a grading scheme and place it into a tabular environment. I would like the syntax to be as simple as possible and decided on: \tabulate{ eval1,%1 ; ...
-15
votes
2answers
1k views

Stringified commands to macros sequence [closed]

First, what is the proper terminology for a "string" in TeX/LaTeX that is an argument for a macro? e.g., \macro{somestring} Obviously somestring is a token, set of tokens, string, argument, etc. I ...
1
vote
1answer
345 views

xparse bug in optional arguments (simply not working)? [closed]

The follow code returns -NoValue- instead of 3 It seems I'm wrong in that I thought xparse took a single argument and parsed it instead of all the arguments of a macro. \documentclass[11pt]{book} % ...
2
votes
1answer
171 views

xparse recursion and/or special numeric specifications

I need to parse a "commands" where each command is is a string of letters and numbers: a34b56c32alpha Does xparse have any way to deal with the numbers? I would like to specify it with something ...
4
votes
4answers
637 views

Writing a multiple option command for a package

I am a newbie at LaTeX programming, so please be patient. :-) I am writing a .sty file which I want to include a command \dan which is overloaded with three separate versions depending on whether ...
9
votes
1answer
611 views

Use the s (star) argument with \NewDocumentEnvironment

Would it be possible to use the s argument specifier of xparse in \NewDocumentEnvironment so that we get an environment an a starred version of it? Actually it works, but the star goes to the wrong ...
5
votes
1answer
421 views

Equivalent of \@afterheading for LaTeX3

I want to define an environment with LaTeX3 where I can supress the indention in the first line. For LaTeX2e you can use \@afterindentfalse\@afterheading. The example use this combination. But I want ...
12
votes
1answer
303 views

Text being output when none should be

I am confused as to why the MWE below produces any black text. As the code is below, the output is: However, if you comment out the \IfStrEq line then it works fine and the black text goes away? ...
1
vote
1answer
1k views

MacTeX 2011, Xetex and Tex Live Utility

I tried several times to play with XeLaTeX (being used to "classical" LaTeX) but since I installed MacTeX 2011 and updated it with TeX Live Utility, I got that kind message : ...
5
votes
1answer
256 views

How can I place a marginnote inside a description (or other list environment)

I have a macro (defined with the xparse package) that creates a marginnote. It works as I would like when prepended to normal paragraph text: \NewDocumentCommand\dates{m g}{% \IfNoValueTF{#2} ...
5
votes
1answer
229 views

Splitting on new lines using \SplitList

What do I pass to \SplitList to get it to split the string on a new line? I've tried \n and \r, but neither of those work. The code I used was \documentclass{article} \usepackage{xparse} ...
3
votes
1answer
725 views

Undefined control sequence with xparse

I just installed the texlive-latex3 package and tried running pdflatex on the following (copied directly from another question posted here): \documentclass{article} \usepackage{xparse} \ExplSyntaxOn ...
9
votes
2answers
2k views

xparse: Define new command with multiple optional parameters

I'd like to define a new command with optional parameters using the xparse package. Please consider the following example: \documentclass{minimal} \usepackage{xparse} ...
10
votes
2answers
358 views

How do I pass an expanded optional argument using expl3/xparse?

I have a command defined using xparse syntax: \DeclareDocumentCommand \foo { O{} m } {} Inside some other command (say, \bar), I want to call this command. The calling command (\bar) has to ...
0
votes
1answer
1k views

XeTeX fails with undefined control sequence in texlive 2012/dev

I'm using XeTeX, and I'm trying to compile a document using the following command: xelatex mydoc.tex I'm getting the following error: ...
2
votes
1answer
1k views

Define a custom align, and align* environment

I would like to redefine both the align and \align* environments such that the first line is shifted up to line up with the list identifier. I attempted to adapt the solution provided at Starred ...
7
votes
2answers
375 views

How can I create an oddly-delimited macro, using xparse?

I have a partial version of this macro working, without xparse, but I needed to tweak it and it got too unwieldy, so I'm trying to use xparse instead. It's admittedly a farfetched macro, but I'm ...
5
votes
1answer
342 views

Using \IfNoValueTF within a TikZ style specification.

In an answer to Flushing PGF commands and local variable Matthew had suggested using \IfNoValueTF within a TikZ \node specification to determine the text. This solution works great for me. However, ...