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This question is similar to TikZ \foreach loop with macro-defined list but here I'd like the macro-defined list to take an argument.

For example, in the following MWE:

\documentclass{article}
\usepackage{pgffor}
\begin{document}
\begin{description}
\item[Macro without argument]
  \newcommand{\macrowithoutargument}{0,...,10}%
  \foreach \x in \macrowithoutargument {[\x]}
\item[Macro with argument]
  \newcommand{\macrowithargument}[1]{#1,...,10}%
%  \foreach \x in \macrowithargument{1} {[\x]}
\end{description}
\end{document}

the \foreach loop with:

  • macro-without-argument-defined list (\macrowithoutargument) works like a charm,
  • macro-with-argument-defined list (\macrowithargument{1}) fails.

Please note that I'm stick with TikZ's \foreach loops: the previous MWE is a minimization of a problem I encounter with TikZ picture where I'd like to draw just a part of a protactor, with the start and end angles given as arguments of a macro.

Hence my question: is it possible for the TikZ's \foreach loop list to be defined with a macro that takes argument(s)?

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Denis Bitouzé
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    Workaround: \edef\tmp{\macrowithargument{1}} \foreach \x in \tmp {[\x]} – Steven B. Segletes Nov 17 '16 at 19:29
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    I think a better solution is to put the whole for loop in a macro. \foreach is programmed to accept either a list, or a macro without arguments that produces a list. – Pieter van Oostrum Nov 17 '16 at 20:02
  • Do you mean something like the \VoltageCurve command in http://tex.stackexchange.com/questions/339611/improving-tikz-coordinate-system-voltage-curve/339625#339625 ? –  Nov 17 '16 at 20:22
  • @Andrew Yes, except I wanted the macro with parameter to be used as list, not to put the to put the whole for loop in a macro, as answered by David or suggested by Piet. – Denis Bitouzé Nov 17 '16 at 20:27
  • @StevenB.Segletes Write an answer with your "workaround"! – Paul Gaborit Nov 17 '16 at 23:28

1 Answers1

8

I'd do

\documentclass{article}
\usepackage{pgffor}
\begin{document}
\begin{description}
\item[Macro without argument]
  \newcommand{\macrowithoutargument}{0,...,10}%
  \foreach \x in \macrowithoutargument {[\x]}
\item[Macro with argument]
  \newcommand{\macrowithargument}[1]{\foreach \x in {#1,...,10}}%
  \macrowithargument{1} {[\x]}
\end{description}
\end{document}
David Carlisle
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