How do I draw a horizontal line (possibly with some text) in optidef? I'm looking for something like:
\documentclass{article}
\usepackage{optidef}
\begin{document}
\begin{mini}
{x}{x^2}{}{}
\addConstraint{x}{<5}{}
%\hrule
\addConstraint{x}{>0}{}
\end{mini}
\end{document}
So far, I came up with:
...
\newcommand\optiComment[1]{\addConstraint{ \relbar\joinrel\relbar\joinrel\relbar \text{#1} \relbar\joinrel\relbar\joinrel\relbar } \nonumber}
...
\begin{mini*}
...
optiComment{ text }
...
\end{mini*}
...
It would be nice to have a rule along the whole line with a comment in the middle.
How about grouping constraints instead using a big left brace for each group?
Solution: start the problem with optidef (or just write it manually), then proceed with
\begin{subequations}
\begin{empheq}[left = \empheqlbrace]{align}
F &= ma\\
v &= at\\
W &= Fs
\end{empheq}
\end{subequations}
which can be adjusted with no limitations (e.g. rules). Conclusion: use a package if it's convenient and provides the proper shortcut. If it requires too many hack, then do it "manually."
