Horizontal line in tabbing environment

Question

I have a tabbing environment and I want next to some text lines a horizontal line up to the end of the page. \hrulefill won't work because of the tabbing. The \noindent\rule{x}{y} will put a line, but since the text lines end at a different point the lines with the defined length will too.

\documentclass{article}

\begin{document}

\begin{tabbing}
  \textbf{whatever short} \= \noindent\rule{20cm}{0.5pt} \\
  2005-2014 \> doesn't matter\\
  \> \textit{doesn't matter}\\
  2011-2012 \> doesn't matter\\
  \> \textit{doesn't mattter}\\
  \textbf{whaaaaaaateeeeeeeever long} \noindent\rule{13cm}{0.5pt} \\
  from 10/2012 \> first one\\
  \> \textit{2nd one}\\
  07/2015 - 12/2015 \> first one\\
  \> \textit{2nd one}
\end{tabbing}

\end{document}

Answer 1

You can use tikz and tikzmark. It needs two compilations.

\documentclass{article}
\usepackage{tikz}
\usetikzlibrary{tikzmark}
\usetikzlibrary{calc}
\begin{document}


\begin{tabbing}
  \begin{tikzpicture}[overlay,remember picture]
  \path (0,0)--++(\textwidth,0) coordinate (yline);
  \draw (pic cs:a) -- ({pic cs:a} -| yline);
  \end{tikzpicture}%
  \textbf{whatever short} \= \tikzmark{a} \\
  2005-2014 \> doesn't matter\\
  \> \textit{doesn't matter}\\
  2011-2012 \> doesn't matter\\
  \> \textit{doesn't mattter}\\
  \begin{tikzpicture}[overlay,remember picture]
  \path (0,0)--++(\textwidth,0) coordinate (yline);
  \draw (pic cs:b) -- ({pic cs:b} -| yline);
  \end{tikzpicture}%
  \textbf{whaaaaaaateeeeeeeever long} \tikzmark{b} \\
  from 10/2012 \> first one\\
  \> \textit{2nd one}\\
  07/2015 - 12/2015 \> first one\\
  \> \textit{2nd one}
\end{tabbing}

\end{document}

Answer 2

tabbing doesn't complain if a cell extends beyond the tab point.

\documentclass{article}
\usepackage{tabularx}

\newcommand{\single}[1]{%
  \textbf{#1}\ \=\kill
  \makebox[\textwidth][s]{\textbf{#1} \hrulefill}}

\begin{document}

\begin{tabbing}
\single{whatever short} \\
2005-2014          \> doesn't matter\\
                   \> \textit{doesn't matter}\\
2011-2012          \> doesn't matter\\
                   \> \textit{doesn't mattter}\\
\single{whaaaaaaateeeeeeeever long} \\
from 10/2012       \> first one\\
                   \> \textit{2nd one}\\
07/2015 -- 12/2015 \> first one\\
                   \> \textit{2nd one}
\end{tabbing}

\end{document}