visualize code indentation

Question

How can I visualize code indentation? What I want is to draw a vertical line along the indentation. Since an example is easier to show then to explain you can see one in this paper (on page 2)

Answer 1

Use the "algorithm2e" package a short example is shown below:

\documentclass{article}
\usepackage{algorithm2e}
\begin{document}
\SetAlgoLined
\begin{procedure}
\Switch{the value of T}{
  \uCase{a value}{
    do this\;
    do that\;
  }
  \lCase{another value}{one line}\;
  \Case{last value}{
    do this\;
    break\;
  }
  \Other{
    for the other values\;
    do that\;
  }
}
\end{procedure}
\end{document}