redefining `\SS` doesn't work as expected

[nschloe]

trafficstars

MWE:

\documentclass{article}

\newcommand{\Scal}{\mathcal{S}}
\renewcommand\SS{\mathcal{S}}

\begin{document}

$\Scal$

x

$\SS{\gamma}$

\end{document}

LaTeXML output:

<document xmlns="http://dlmf.nist.gov/LaTeXML">
  <resource src="LaTeXML.css" type="text/css"/>
  <resource src="ltx-article.css" type="text/css"/>
  <para xml:id="p1">
    <p><Math mode="inline" tex="\mathcal{S}" text="S" xml:id="p1.m1">
        <XMath>
          <XMTok font="caligraphic" role="UNKNOWN">S</XMTok>
        </XMath>
      </Math></p>
  </para>
  <para xml:id="p2">
    <p>x</p>
  </para>
  <para xml:id="p3">
    <p><Math mode="inline" tex="\SS{\gamma}" text="SS * gamma" xml:id="p3.m1">
        <XMath>
          <XMApp>
            <XMTok meaning="times" role="MULOP">⁢</XMTok>
            <XMTok role="UNKNOWN">SS</XMTok>
            <XMTok font="italic" name="gamma" role="UNKNOWN">γ</XMTok>
          </XMApp>
        </XMath>
      </Math></p>
  </para>
</document>

Expected output:

[...]
<p><Math mode="inline" tex="\mathcal{S}{\gamma}" text="SS * gamma" xml:id="p3.m1">
[...]

(Resolve \SS.)

[dginev]

Indeed, it is locked, the log tells you:

Info:ignore:\SS Ignoring redefinition of \SS at test.tex; line 4 col 0

The perl code is: https://github.com/brucemiller/LaTeXML/blob/faa73d9351388d85e2481b77b131084be46b5e5a/lib/LaTeXML/Package/LaTeX.pool.ltxml#L5471-L5472

So this may be a limitation we can upgrade away from only after we switch to fully loading latex.ltx raw...

For the short term you could use a different macro, or provide your own binding that repeats the DefPrimitive while simply removing the "locked" directive.