Adding line after section heading

Question

I am trying to add a horizontal line (like \hrule) that starts just after each section's heading, fills the rest of the line, and is vertically aligned with the heading, as shown below.

To do so, I have defined a \newcommand called \raisedrule that generates the desired horizontal line (following this post). However, I am having difficulty incorporating it into the definition of the sections' headings.

I have tried using the titlesec package, but I have not found a way to generate a line that is shorter than the text's width. I have also tried using the sectsty package, using the following code:

\documentclass{article}

\newcommand{\raisedrule}[2][0em]{\leaders\hbox{\rule[#1]{1pt}{#2}}\hfill}

\usepackage{sectsty} 
    \sectionfont{
        \setmainfont{Arial} \raisedrule[0.32em]{0.75pt}
    }

\usepackage{fontspec}

\begin{document}

\section*{SECTION HEADING}

\end{document}

which, not only gives a "Leaders not followed by proper glue." error, but I don't think would generated the required output anyway.

Note that, as shown in the code, I also want to change the font of the heading, which may be important for the solution.

Any help would be greatly appreciated.

Answer 1

If you are willing to switch to titlesec which offers more customization capabilities (I also used xhfill to easily produce the rule, but this is optional):

\documentclass{article}
\usepackage{fontspec}
\usepackage{titlesec} 
\usepackage{xhfill}

\newcommand\ruleafter[1]{#1~\xrfill[.7ex]{1pt}}
\titleformat{\section}
  {\normalfont\Large\fontspec{Arial}}{\thesection}{1em}{\ruleafter}

\begin{document}

\section*{SECTION HEADING}

\end{document}

The result:

Adjust the rule settings according to your needs; you might want to adjust the space between the title and the rule and, as Sean Allred mentions in his comment, it's enough to use \fontspec instead of \setmainfont.