macrostables
Is it possible to create a \newcolumntype-like macro accepting more than one argument and one of them is an optional argument?
I want to create a column type A that can accept more than 1 argument such that I can create a tabular as follows:
\begin{tabular}{|A[2cm]{1cm}{5cm}|c|l|r|}
...
\end{tabular}
Note: the column type A accepts 3 arguments in this example.
Try the LaTeX 3 package xparse. For example:
\documentclass{article}
\usepackage{xparse}
\NewDocumentCommand{\foocmd}{ O{default1} O{default2} m }{#1~#2~#3}
% ⤷ #1 ⤷ #2 ⤷ #3
\begin{document}
\foocmd{foo} \par
\foocmd[nondefault1]{foo} \par
\foocmd[nondefault2][notfoo2]{foo} \par
\end{document}
You may read the documents for more information.
Perhaps there is a more efficient way but you can always do something like this:
\documentclass{article}
\usepackage{etoolbox}
\newcommand\MyCmd[1]{\typeout{Mycmd: #1}\mycmd#1}
\def\mycmd(#1|#2){
\typeout{mycmd: 1: #1. 2: #2.}
}
\begin{document}
\forcsvlist\MyCmd{{(fancy|empty)}, {(plain|plain)}, {(user|plain)}}
\end{document}
When you latex this the log file contains
Mycmd: (fancy|empty)
mycmd: 1: fancy. 2: empty.
Mycmd: (plain|plain)
mycmd: 1: plain. 2: plain.
Mycmd: (user|plain)
mycmd: 1: user. 2: plain.
which shows that \MyCmd is receiving the argument pairs correctly and then passing them onto \mycmd n the expected way.
(I took out your toggle commands as they seem to reply on some other code tat you didnt include.)
Best Answer
Herbert has explained how to do mandatory arguments. Optional arguments is doable but requires some low-level hackery, auxiliary functions and is not for the faint-hearted. You can see two versions of the same approach in numprint and siunitx (the later is an adaptation of the former).