\addfontfeatures attribute lost after next fontspec command (like \textbf{})

Question

1. I'm using Linux Libertine font (from system) with XeTeX.
2. In the body, I'm using OldStyle numerals while I want Lining numerals in the tables.
3. I'm typesetting tables that have some cells with \bfseries text.

However, the \addfontfeature setting is only applied to regular text, but not text that is set in \bfseries.

MWE

\documentclass{scrartcl}
\usepackage{array,booktabs,fontspec}
\setmainfont[Ligatures={Common},Numbers={OldStyle}]{Linux Libertine O}

\begin{document}
\begin{table}
  \addfontfeature{Numbers={Lining}}
  \begin{tabular}{>{\bfseries}ll} \toprule
    3 & 3 \\ \bottomrule
  \end{tabular}
\end{table}
\end{document}

This yields:

How can I set \addfontfeatures{Numbers={Lining}} to apply to all text in a group?

Answer 1

The problem is reproducible without a tabular:

\documentclass{scrartcl}
\usepackage{array,booktabs,fontspec}
\setmainfont[Ligatures={Common},Numbers={OldStyle}]{Linux Libertine O}

\begin{document}

1234567890

{\addfontfeatures{Numbers=Lining}

1234567890

\normalfont 1234567890

\bfseries 1234567890}

1234567890

\end{document}

As you see, the call to \normalfont resets the features back to what's stated at the beginning. The \bfseries command does \fontseries{\bfdefault}\selectfont which nullifies the chosen feature.

My advice is to avoid \addfontfeatures whenever possible, even at the cost of some code duplication.

\documentclass{scrartcl}
\usepackage{array,booktabs,fontspec}
\setmainfont[Ligatures={Common},Numbers={OldStyle}]{Linux Libertine O}
\newfontfamily{\mainlining}[Ligatures=Common,Numbers=Lining]{Linux Libertine O}

\begin{document}

\begin{table}
\mainlining

\begin{tabular}{>{\bfseries}ll}
\toprule
3 & 3 \\
\bottomrule
\end{tabular}

\end{table}

\end{document}

Answer 2

Use

 \documentclass{scrartcl}
 \usepackage{array,booktabs,fontspec}
 \usepackage[oldstyle]{libertine}
 \defaultfontfeatures{Ligatures=Common}
 \begin{document}

\begin{table}[!htb]
\libertineLF
 \begin{tabular}{>{\bfseries}ll} \toprule
            123 & 31234 \\ \bottomrule
 \end{tabular}
\end{table}

 \end{document}