{expansion} is about expanding tokens, including the manipulation of expansion order and the suppressing of expansion.
1
vote
0answers
32 views
Expand command read from file
I have a file, that contains a list of latex commands each command per line. Now I want to read this file line per line and execute/expand the macros automatically. I tried the following but this only ...
5
votes
4answers
55 views
Expansion of commands in errmessage
When I run
\documentclass{article}
\def\pet{dog}
\errmessage{My \pet\ is {sick}}
\begin{document}
My \pet\ is {sick}.
\end{document}
the error message is:
My dog\ is {sick}.
but the PDF ...
8
votes
2answers
58 views
Preserving (and Controlling) Expandedness
In most cases, by the time output gets to your screen, arguments are fully expanded and my question is moot. But sometimes (verbatim being a common example), one wishes to operate on arguments with ...
17
votes
2answers
231 views
Difficulty with macro expansion (updated)
I'm not getting the output I want from my LaTeX code, and I think the problem is that I'm not expanding things at the right times.
Code
\documentclass{article}
\usepackage{tikz}
...
7
votes
1answer
59 views
String Comparison with a \protected\def
I am using a \protected\def as that solved an earlier issue of mine. I need to compare this value of the token to see if it is initialized to the same value as the \protected\def in different ways.
...
2
votes
2answers
64 views
Undefined control sequence \pgfmath@
Why does the following code give me this error message?
Error
ERROR: Undefined control sequence.
--- TeX said ---
\pgfmath@dimen@ ...men@@ #1=0.0pt\relax \pgfmath@
l.28 \draw ...
4
votes
2answers
45 views
Package xparse \SplitList last token
I need to create a macro to render lists with a variable number of arguments (1+), e.g.
\mylist{1,2,3} should expand to $\tilde{1}$--$\tilde{2}$--$\tilde{3}$. I'm trying to use xparse and \SplitList, ...
9
votes
1answer
63 views
Expandable, very specific keyval processing
I am having a hard time trying to come up with an fully expandable keyval parsing macro which deals only with specific keys/values. I wouldn't even attempt this in full generality, that's way beyond ...
7
votes
1answer
56 views
Modified \overline over first character of complex argument
I've been using zref to handle my references. It has allowed me to customize a reference the way I want through its property lists. In particular, I reference a variety of structures in my document ...
2
votes
1answer
78 views
Cutting string with formula or cite
I am trying to define a macro that would take a string and paint its ending, for example:
\def\paintString#1{%
\saveexploremode%
\exploregroups%
\textcolor{white}{\StrGobbleRight{#1}{5}}%
...
3
votes
2answers
60 views
How to append commands to a macro without expanding them
I'm working on building an expenses package. The intention is to be able to write
\expense{someone}{something}{something a bit longer}{10}{GBP}
\expense{someone else }{something else}{something a bit ...
18
votes
3answers
176 views
Why the \expandafter\@firstoftwo idiom?
I see a lot of macros which are conditional tests followed by a {true}{false} pair defined so that they result in either:
\expandafter\@firstoftwo
or
\expandafter\@secondoftwo
Why are these ...
3
votes
2answers
79 views
How to use a TeX macro with a CSV list to filter an external file
The code below produces the results I desire, which is a list of the lines with XXX={<value>} with a <value> which is not one of the allowed list of values:
However, this solution ...
4
votes
1answer
115 views
Preprocessing Latex: What is your workflow? Your tools?
I know, for various reason, some users preprocess their latex file using Perl or sed, say.
I'm considering doing this to, so I would like to seek your guidance, to smooth my entry in this area.
My ...
6
votes
2answers
108 views
Delaying command expansion that appears in \begin handler until \end handler executes
I have a custom environment for handling a code interface declaration that is specified as:
\begin{decl}{FOO}
\param{in}{bar} the bar input parameter
\param{out}{baz} the baz input parameter
...
12
votes
2answers
160 views
Expanding arguments before macro call
I've been banging my head against this for days. I have a macro which takes a macro name and its arguments. It then re-arranges the arguments a bit and then calls the passed macro with the re-arranged ...
3
votes
2answers
84 views
List of tokens from TeX mouth
Is it possible to get list of tokens which comes from TeX "mouth"? If I understand correctly: in mouth all macros, conditionals and special operations (like \the and \input) are expanded and then goes ...
1
vote
1answer
47 views
How to expand keyval options immediately
I am trying to build up a macro that creates other macros depending on kvoptions' options. But then, the outcoming macros are dependent on the actual state of the options instead of their state at the ...
3
votes
1answer
60 views
How to use commands in table specs, and still support array package?
For a package, I want to write code that creates tables, where the exact type of table is configurable (tabular, longtable, tabularx, ... [Update: David rightly remarked that formats like tabularx ...
2
votes
1answer
65 views
At which point does \immediate\write write to file?
Assume I have opened a file myfile and write to it with
\immediate\write\myfile{My cat is too old}
I have multiple such statements in my document and do calculations in between which influence the ...
2
votes
0answers
96 views
\ref, \autoref and hyperref expansion
I'm trying to write section numbers to a file with the newfile package.
In details, this MWE basically tries to write to a .ref file with lines like A-B. The A and B are generated by \label and \ref ...
10
votes
5answers
345 views
How to create a “delay expansion” environment?
I don't want to use the following
\begingroup
\edef\next{\endgroup
\noexpand\const{Xp}{\X(tp)}
\noexpand\const{Yp}{\Y(tp)}
\noexpand\const{Xf}{\X(tf)}
\noexpand\const{Yf}{\Y(tf)}
...
2
votes
1answer
40 views
Specify file name shell access via \@@input
Background:
I need to perform a conditional branch based on the first three characters of a file. I found a rather simple solution (on a Unix system, or PC with cygwin installed):
head -1 ...
14
votes
2answers
272 views
LaTeX3: How to get reliable control over the level of expansion?
Say you want to write LaTeX3 code that manages user data. Sometimes you want to process that data, but other times you just want to store it, move it around and return it unchanged (when developing a ...
14
votes
3answers
189 views
Parsing strings containing diacritical marks (macros?)
I apologize that this question may seem very much like several other recent ones I have asked (Parsing leading hardspaces, Parsing a \$ as part of an improved \getargs command). They are all related ...
6
votes
1answer
65 views
\def variables with xparse and other questions about variables
I'm writing a documentation for a REST API. So there's very much information that has to get repeated. So I'm trying to figure out a few things:
Consider the following code:
...
4
votes
1answer
63 views
Expand macro immediately in \pagenote
I'm trying to use the contents of a macro in a \pagenote, using the memoir class:
\documentclass{memoir}
\makepagenote
\def\myvar{Good morning.}
\begin{document}
In the morning\pagenote{\myvar}
...
5
votes
2answers
98 views
Variadic arguments macro
I am trying to make macro with variadic arguments, iterating over them.
The final result is supposed to be:
\foreach[x]((var = \x )){foo}{bar}{baz}\null
evals to
var = foo var = bar var = baz
My ...
6
votes
1answer
63 views
Forcing macro expansion with keyval
While trying to provide an answer to this question, I've run into a stumbling block that I can't seem to get over. The listings package (like many others) uses keyval to handle configuration. What ...
7
votes
2answers
105 views
Is there a way of defining a command \nullifyifmoved{arg} that will normally act like its argument but act like a no-op if the macro is “moved”?
I'm interested in a macro \nullifyifmoved that takes one argument arg and acts like arg in normal contexts, except it acts like a no-op wherever it is written to a file. Some background:
Martin ...
3
votes
1answer
54 views
List Version of \str_if_eq
I am using \str_if_eq:xxTF{\A}{\Target}{<true>}{<false} to execute the <true> or <false> code if \A=\Target.
What is the list version equivalent of this?
So I am looking for ...
9
votes
1answer
130 views
Is there a way of defining a command which is automatically converted to a no-op after its first execution?
Is there a way of defining a command that can be executed only once and is then redefined to be a no-op?
Related:
Is there a way of defining a command \nullifyifmoved{arg} that will normally act ...
3
votes
3answers
102 views
Macro to be used in a \section command that has no effect in the table of contents
I need a macro that is executed only in the main document (within a section title) and then disappears (for the table of contents).
A minimal example where this occurs is this:
...
5
votes
3answers
98 views
Metacommand for commands that dynamically select a parameter?
Original question
I would like to create a metacommand for creating new projection commands. Specifically, \newproj{\cmd}{<n>}{<m>} should create \cmd as a new command of <n> ...
5
votes
2answers
62 views
passing current content of commands to a macro
I am sorry for this is probably a current question with a well known answer, but I was not able to google it out.
I am trying to build a macro adding content step by step; at every step I need to ...
1
vote
0answers
58 views
Expanded StrSubstitute
I am trying to use \StrSubstitute, but what I want is to expand it all the way to get the result string.
\StrSubstitute{Řepa}{Ř}{Rzzz}
then i use it with
% somehow define \a as the result string ...
13
votes
2answers
288 views
Allow underscore in PGFPlots tick labels read from table
I'm trying to use the text data from a table column as the tick labels in a plot. The text data contains underscores, which makes LaTeX throw a Missing $ inserted error. I'd usually get around this by ...
23
votes
3answers
370 views
A guide to understanding expandability: when to write protected functions and when not to
I'm having difficulty understanding (and appreciating) the concept of expandability. I'm very murky about understanding when and how expandability impacts me in writing code for my documents.
I've ...
2
votes
1answer
90 views
Passing name ending with number to \csname does not work [duplicate]
Possible Duplicate:
macro names with special characters
When I use \yyy defined bellow it does not print yyy, but if I use \xxx it prints xxx. How can I make \yyy work?
\def\P1{yyy}
...
6
votes
1answer
218 views
Difference between \newcommand and \pgfmathsetmacro used in TikZ \coordinate
Consider the following code:
\documentclass{article}
\usepackage{tikz}
\begin{document}
\begin{tikzpicture}
\newcommand{\MA}{4}
\pgfmathsetmacro{\MB}{4};
\coordinate (V11) at (0,0);
...
8
votes
3answers
122 views
Nested use of \ifcsname needs protection
I have a macro \command to ensure that the names of macros in my documentation are consistently formatted. Been work great, until I had an urge to procrastinate and had this brilliant idea that I can ...
5
votes
1answer
106 views
How to use macros in command \dirtree of package dirtree?
I want to print a tree structure and started using the package dirtree (v0.32,
see Making a (simple) directory tree). Following calls work smooth:
\dirtree{.1 root. .2 child1. .2 child2. .3 ...
2
votes
1answer
129 views
Using “German” quotation marks inside \newcommand [duplicate]
Possible Duplicate:
babel shorthand "| doesn’t work in macros
I know there is a deeper non-understanding of LaTeX mechanics at work here, but I have no idea how to phrase my question ...
7
votes
1answer
68 views
Define macro based on Datatool contents
I can define a macro of the form \csname../dirX Color\endcsname manually and use it as desired. However, I am unable to do the same thing based on the contents as read by the datatool package.
The ...
6
votes
3answers
96 views
reproduce section at different position
I would like to reproduce a \section at a later position, with the same number as at the original position. I tried
\newsavebox{\meinebox}
\savebox{\meinebox}[80mm][l]{\section{Hier}}
...
7
votes
1answer
127 views
\ifmmode self-contradictory in amsmath (OK in just LaTeX)
File:
\documentclass[11pt]{article}
\usepackage{amsmath}
\newcommand{\argghhh}{\relax\ifmmode\bar\else\expandafter\=\fi}
\begin{document}
$ \argghhh a $
\end{document}
produces error (but ...
3
votes
1answer
68 views
using \ForEach to input chapters in a document
I have several chapters in the folder /Chapters and I have the following LaTeX code:
\newcommand\chapnames{Chap1, Chap2, Chap3, Chap4, Chap5, Chap6}
\ForEach
{,}
{\input{./Chapters/\thislevelitem}}
...
18
votes
1answer
186 views
Unusual numbering: combine alph, Alph, arabic
I would like to have an unusual numbering aAa going as follows:
0 -> *
-------------------------
1 -> a
2 -> b
...
25 -> y
26 -> z
-------------------------
27 -> A
28 -> B
...
2
votes
1answer
60 views
Pass the contents of an \input command to a macro
I am having some difficulty with the expansion of LaTeX. I would like to expand the contents of an \input command before passing them to macro, in a pattern similar to the following:
\outer{\inner}
...
8
votes
1answer
84 views
Omitting arguments in macro expansion
Changing a simple TeX macro like
\def\macro#1 #2{#1 #2}
into
\def\macro#1 #2{#1}
alters the output of
\macro Hello world
surprisingly for me to
Helloorld
My expectation would have been to ...
