]{siunitx}
%\usepackage{luatexja-fontspec}
\makeatletter
-\typeout{\meaning\@begindocumenthook}
+%\typeout{\meaning\@begindocumenthook}
\begin{document}
\ifdefined\gtfamily\gtfamily\fi Ω
{\ExplSyntaxOn\makeatletter
\SI{-2.5e-10}{mol.L^{-1}}\SI{1}{\micro\metre\angstrom\arcminute\arcsecond\ohm}
\vrule\SI{}{\ohm}\vrule
- \end{document}
\ No newline at end of file
+
+ $\begin{array}{lSs}
+% \typeout{\meaning\@preamble}
+ a&-.123 & J.mol^{-1} \\
+ a&1.23e-3 & Hartree \\
+ \end{array}$
+
+\begin{tabular}{lSs}
+% \typeout{\meaning\@preamble}
+ a&-.123 & J.mol^{-1} \\
+ a&1.23e-3 & Hartree \\
+\end{tabular}
+
+\end{document}
+
+
+LTJ
+\d@llarbegin \__siunitx_table_collect_begin:Nn S{}\relax
+\pltx@next@inhibitglue \ltjfakeboxbdd \ignorespaces
+\@sharp \unskip \ltjfakeboxbdd \__siunitx_table_print:\relax \d@llarend
+
+non-LTJ
+\d@llarbegin \__siunitx_table_collect_begin:Nn S{}
+\ignorespaces \@sharp \unskip \__siunitx_table_print:\relax \d@llarend