3
votes
2answers
53 views

Problems in expansion of a setcounter macro (Use of \csname doesn't match its definition)?

Followup to Split the reference counter for any numbered item (like with subequations) : I was trying to make a generic subanything macro, and I fail miserably - see MWE below for what I get as error ...
3
votes
1answer
31 views

Replacing some macro tokens in a list before \write ing

I'm trying to hack a bibliography package (amsrefs), and fall into the following problem. I'm trying to convert the amsrefs format back to .bib files. This doesn't quite work, because strings get ...
1
vote
1answer
30 views

BibLaTeX' \citefield not expanded as expected

I have run into what looks like a macro expansion issue. Consider the following example: \documentclass{article} \usepackage{hyperref} \usepackage{biblatex} \begin{filecontents}{expprob.bib} ...
5
votes
3answers
147 views

Trim braces from macro content

I'm having macros with a content which may or may not have extra curly braces. I want to trim the extra braces but without expanding the rest of the content, if possible. The following code shows the ...
4
votes
1answer
43 views

How do you define a command to select nested groups?

Assuming a pair structure (2-tuple) is defined using groups {{<tokens1>}{<tokens2>}} is it possible to define a command \first#1{...} (and \last#1{...}) taking the surrounding group as ...
8
votes
3answers
518 views

Without any built-in looping macro, can we just use a recursive macro to get a-b-c-d-e?

Without any built-in looping macro, can we just use a recursive macro to get an output of a-b-c-d-e? \def\aaa #1{#1-\aaa} \aaa abcde % expected result : a-b-c-d-e \bye Edit: Probably the best way ...
8
votes
2answers
90 views

How to use \edef to wrap an existing macro with @inmatherr?

I have a handful of existing macros that I want to wrap in some custom processing. Here's an example of the kind of thing I'm aiming to do: \makeatletter \let\olddag\textdagger ...
8
votes
1answer
188 views

Understanding token expansion

First of all, note that this question is to be regarded as a learning question as I am not looking for a package (I know very well the xparse package). I am attempting to write a macro which has the ...
4
votes
2answers
119 views

\expandafter, \expandbefor : what else?

I have a macro that prints exactly what I want, but I can't use it nested in another one. As far as I understand it is because the fist one is not completely executed and commands from first macro ...
4
votes
1answer
41 views

\newrobustcmd not expandable as key-value?

I do some TeX experiments with 'postponed' content, writing it to some file to be included later on (not necessarily at end, but most time it would be appropriate to place it there) I defined some ...
5
votes
2answers
87 views

How can I force lstlisting to expand an argument?

I'm trying to use the listings package with a variable language (it's actually for a package). However, I can't seem to pass a macro as the value half of a key-value pair. Here's a simple example: ...
5
votes
1answer
67 views

How to store tcolorbox's (multiple) settings in a macro?

I'd like to store tcolorbox' (multiple) settings in a (single) macro (in fact, a xkeyval's \cmdKV@fam@key macro) and use them afterwards via this macro (I know I should use pgfkeys instead, but my ...
4
votes
3answers
104 views

Macro concatenation via expansion multiple times with some tokens protected?

In the MWE below, I want to create a \doPlotCoords macro from scratch, by appending \addplot commands: \documentclass{article} \usepackage{pgfplots} \usepackage{pgfplotstable} \usepackage{adjustbox} ...
6
votes
3answers
122 views

Report all duplicate macro names defined by \newcommand

I have a shell script that produces a large list of macros in an external file in the form: \expandafter\newcommand\csname XX Name ABC\endcsname{some text ABC 1} \expandafter\newcommand\csname XX ...
12
votes
2answers
158 views

Why does this use of `\expandafter` not work?

I've written the following code: \newif\ifconsecutive \consecutivefalse \newcommand{\myfirst}[1]{#1\consecutivetrue\expandafter\consecutivefalse} \newcommand{\mysecond}[1]{\ifconsecutive ...
2
votes
1answer
27 views

Macro defining another macro with spaces in its name

I am trying to use the KOMA-Script command \newcaptionname which takes a macro name as its second argument, but I need spaces in it: \documentclass{scrartcl} ...
8
votes
2answers
99 views

Apply command to list of elements separated by \and

I am trying to build a command similar to the \author command. It takes one argument with is actually a list of arguments separated by \and. The command needs to apply another command like \underline ...
11
votes
2answers
227 views

Define and set length in one command

Sorry this might be a very simple question, I am trying to cleanup a style file, and would like to write a command that basically runs the following code: ...
8
votes
2answers
168 views

How does expansion matter?

\newcount\@repeat% \def\repeat#1#2{% \@repeat#1\relax% \ifnum#1>\z@\relax% \advance\@repeat by -1\relax% \repeat{\@repeat}{#2}#2% \fi}% \repeat{2}{1}\\% \repeat{11}{f}\\% ...
3
votes
2answers
68 views

Generate comma separated list with some non-empty strings

I'm trying to generate a comma separated list that uses strings that may or may not be empty. For example \mylist{\stringA,\stringB,\stringC} would expand to A, C if B is empty or B, C if A is empty, ...
8
votes
4answers
160 views

Problem with csname macro expansion

I want to dynamically define some macros that essentially create a list of \refs. I seem to be able to define these macros but then I am unable to print them. Here is my M(non)WE: ...
10
votes
2answers
171 views

Save counter value inside command?

I'm trying to automatically generate commands based on the value of a counter: \documentclass{article} \newcounter{count} \newcommand\generator[1]% {% \stepcounter{count}% ...
2
votes
1answer
92 views

Macro for pgfplot cycle list entry

I'm trying to define multiple cycle lists based on macro variables. The reason for this is that I need more than one list and I want to be able to change the appearance quickly while keeping the ...
7
votes
1answer
101 views

Make the pattern of a \def depend on another macro

I would like to set up a macro defined something like this: \def\processline string: #1.#2\relax{\gdef\errorline{#1}} The catch is that the string should be given by the contents of another macro. ...
17
votes
2answers
365 views

Why does this simple \ifx test fail?

This should be easy, but I don't understand why the test below fails... I expected Hurrah! to be printed when the \currentchar count reaches 90 (i.e. the character code of Z). There must be some ...
6
votes
1answer
69 views

Expand package option, to make contained character math-active

In an answer to another question of mine, egreg posted code, which activates a character in math mode and gives it the function of \operatorname. Now I want to put this into a package and set the ...
7
votes
2answers
222 views

Expanding a sequence inside a TikZ path

I am trying to draw a simple path using TikZ, with a custom syntax to specify it. This works: \documentclass{article} \usepackage{tikz} \begin{document} \newcommand{\latticepath}[1]{ ...
44
votes
4answers
2k views

What is “expansion”?

I'm relatively new to (La)TeX, but I have a reasonable amount of experience with computational programming languages. Until I began learning (La)TeX, I'd never heard of "expansion"... So, what is ...
7
votes
2answers
159 views

\g@addto@macro appending code using parameter

After a lot of trial and error, I haven't been able to solve the following problem: A simplified version: I want to use \g@addto@macro to add code to another macro wich will use a command of the ...
4
votes
1answer
156 views

Is it possible to define abbreviations for coding?

I am using the tikz-timing package to create a timeline since chronosys and chronology wouldn't cooperate and were too limited and archaic-looking to suit my purposes, and moderntimeline unfortunately ...
4
votes
2answers
160 views

Concatenate macro with string

I try to expand a macro containing a string with another string. It is in the document and thus I want to avoid using @. I tried the following using etoolbox ...
4
votes
2answers
104 views

How to deal with macro expansion and 'TeX capacity exceeded' when using write18?

This issue is driving me nuts. Ever since the friendly and knowledgeable people here on tex SE have guided me to doing multiple string replacements the proper way, I've been trying to incorporate that ...
6
votes
1answer
102 views

Macro expanding to comma separated list

I'm trying to use a macro for pgfplotstable labels but the macro is treated as a single entry of a csl rather than a csl. The Question asked in Using a macro as value of addtotoc in \includepdf ...
5
votes
1answer
139 views

“Flatten” macros prior to sharing LaTeX file

Is there a way/an existing tool to process a LaTeX source document such that for a given list of macro definitions (using \newcommand), calls to those macros are replaced by their expanded version? ...
1
vote
0answers
34 views

What's the shortest input that makes TeX and/or TeX-based systems go into a loop? [duplicate]

The following 12-character input causes TeX to go into a loop. \def\x{\x}\x It won't crash, it won't produce an error message, it'll just sit there for ever, trying to compile the document (but not ...
5
votes
2answers
76 views

Comparing the arguments passed to a macro

I want to write a command which makes a norm of a vector, with following syntax: \xnorm{v}. I want the norm delimiters to adapt to the size of the expression contained in \xnorm{}, BUT I want also an ...
5
votes
2answers
133 views

How to get character code defined with \let (! Improper alphabetic constant)

Here's a example with the "! Improper alphabetic constant" error: %% this is ok \newcount\mychar \mychar=\number`a\relax \showthe a % shows You can't use `the letter a' after \the ...
6
votes
1answer
94 views

Expanding a macro as many times as possible without error

I'd like compute cosets using the permute package. Here's what I have so far: \documentclass{article} \usepackage{expl3,xparse,permute} \ExplSyntaxOn % Create a new command to compute the right ...
5
votes
1answer
65 views

Using xstring macros in edef

I've tried to use \protect to make the following \edef work but no luck. Can it be done somehow? \documentclass{article} \usepackage{xstring} \begin{document} \def\abc{a,b,c} ...
8
votes
1answer
60 views

Moving the optional argument

When I create macros using \newcommand, I usually provide default variants setting some of the first arguments in a sort of partial application style \newcommand\five[5]{#1,#2,#3,#4,#5} ...
0
votes
0answers
22 views

“Expanding” locally defined commands [duplicate]

I wrote a paper using custom ("locally defined") commands and environments (e.g. a new quote environment, loads of abbreviations, etc.). The journal requires me eliminate all non-standard LaTeX ...
4
votes
1answer
79 views

Expanding a variable within a protected label

I have some trouble with expanding variables within a protected label. I need a automatisated caption with a label all inside a command. Within the caption I want to have a two digit number ...
4
votes
2answers
90 views

Creating a new array column type dynamically

I am evaluating toks registers for various uses - they are still fairly new to me. I'm using them to construct a table column-wise. During this, I have come across an issue I have failed to find a ...
10
votes
1answer
80 views

\toks register expansion issue - or is it?

I am trying to assemble a table that occurs multiple times throughout a document. It always consists of some fixed columns, followed by a set of columns that appear in one table but are not needed in ...
9
votes
2answers
202 views

Still having difficulty with use of `\expandafter`

Firstly, my apologies for any previous confusion, I've separated out various questions onto distinct pages. This problem came up in the context of trying to split a decimal number. Good solutions to ...
8
votes
1answer
102 views

Implement functionality equivalent to many thousand \savebox

I have a large (approx 600 pages) index of files, and for each file entry significant computation is required so that additional links can be added. The computation of these links takes quite a bit ...
4
votes
4answers
279 views

How to repeat text

I get interesting errors with the following macro. Mostly it works, but I get extra spaces after \noindent (but not after \newline). I tried using \loop or \whiledo (from ifthen) but get stack ...
5
votes
1answer
130 views

How can I define a macro with literal square brackets in the body?

The following macro works correctly for enclosing an expression in parenthesis. \def\group#1{\left ( #1 \right )} I want to write the equivalent macro for enclosing an expression in square ...
9
votes
2answers
258 views

How can I encode the current document as a QR code with pst-barcode?

\documentclass{article} \usepackage{pst-barcode} \begin{document} \begin{pspicture} \psbarcode{\input{\jobname.tex}}{}{qrcode} \end{pspicture} \end{document} I tried placing \expandafters before ...
5
votes
1answer
127 views

Capitalization of datetime format

In languages like dutch, the first letter of the names of days and months are not capitalized unless they occur as the first character of a sentence. So I added the following code in the preamble of ...