combine \oldstylenums and \textsc

Question

I would like to have a command that combines \oldstylenums for numbers in the argument and \textsc for text in the argument. I believe that a solution using some for loop is possible, but I think there must be a simpler solution.

MWE:

\documentclass{article}

\usepackage[T1]{fontenc}
\usepackage[utf8]{inputenc}
\usepackage{lmodern}
\pagestyle{empty}

\begin{document}

I get \oldstylenums{1s}

I want \oldstylenums{1}\textsc{s}

\end{document}

Answer 1

well of course what you really want in that case is a font with small caps and old style numerals. As a real or virtual font, then You would just access the font and TeX wouldn't have to do anything. But virtual fonts are not really so popular these days, do perhaps a TeX loop:

\documentclass{article}

\usepackage[T1]{fontenc}
\usepackage[utf8]{inputenc}
\usepackage{lmodern}
\pagestyle{empty}

\begin{document}

I get \oldstylenums{1s}

I want \oldstylenums{1}\textsc{s}

\makeatletter
\def\zzz#1{%
\@tfor\tmp:=#1\do{%
\ifcat1\tmp\relax\oldstylenums\tmp\else\textsc\tmp\fi}}
\makeatother

\zzz{1s}

\end{document}

Answer 2

The cfr-lm provides support for oldstyle figures in Latin Modern, among other things:

\documentclass{article}

\usepackage[T1]{fontenc}
\usepackage[utf8]{inputenc}
\usepackage[rm=oldstyle]{cfr-lm}
\pagestyle{empty}

\begin{document}

1234567890

\textsc{I want 1234567890}

\end{document}