% Define \SXtitle to lift \SSubtitle out:
\def\SXtitle#1{\title{\let\SSubtitle\SSubtitleDrop#1}\SExtractSubtitle#1\SExtractSubtitleDone}
\def\SSubtitleDrop#1{}
\def\SExtractSubtitleDone {}
\def\SExtractSubtitle{\futurelet\next\SExtractSubtitleX}
\def\SExtractSubtitleX#1{\ifx#1\SSubtitle \let\Snext\SWithSubtitle \else \let\Snext\SExtractSubtitleY \fi \Snext}
\def\SExtractSubtitleY{\ifx\next\SExtractSubtitleDone \let\Snext\relax \else \let\Snext\SExtractSubtitle \fi \Snext}
\def\SWithSubtitle#1{\subtitle{#1}\SExtractSubtitle}

\renewcommand{\titleAndVersionAndAuthors}[3]{\SXtitle{#1}#3}
\renewcommand{\titleAndEmptyVersionAndAuthors}[3]{\titleAndVersionAndAuthors{#1}{#2}{#3}}
\renewcommand{\titleAndVersionAndEmptyAuthors}[3]{\SXtitle{#1}\author{Anonymous Author(s)}}
\renewcommand{\titleAndEmptyVersionAndEmptyAuthors}[3]{\titleAndVersionAndEmptyAuthors{#1}{#2}{#3}}

% Support plain `author' while enabling `authorinfo': for each
% use of \SAuthor, check whether it contains an \SAuthorinfo form:
\def\SAuthor#1{\author{#1}}

\renewcommand{\SAuthorSep}[1]{}

\renewcommand{\SConferenceInfo}[2]{\conferenceinfo{#1}{#2}}
\renewcommand{\SCopyrightYear}[1]{\copyrightyear{#1}}
\renewcommand{\SCopyrightData}[1]{\copyrightdata{#1}}
%\renewcommand{\Sdoi}[1]{\doi{#1}}
\renewcommand{\SPexclusivelicense}[0]{\exclusivelicense}

\renewcommand{\SCategory}[3]{\category{#1}{#2}{#3}}
\renewcommand{\SCategoryPlus}[4]{\category{#1}{#2}{#3}[#4]}
\renewcommand{\STerms}[1]{\terms{#1}}
\renewcommand{\SKeywords}[1]{\keywords{#1}}

\newcommand{\StitleShort}[2]{\title[#1]{#2}}

\newcommand{\SacmBadgeRURL}[2]{\acmBadgeR[#1]{#2}}
\newcommand{\SacmBadgeLURL}[2]{\acmBadgeL[#1]{#2}}

\newcommand{\SgrantnumURL}[3]{\grantnum[#1]{#2}{#3}}

\newcommand{\SreceivedStage}[2]{\received[#1]{#2}}

\newcommand{\SccsdescNumber}[2]{\ccsdesc[#1]{#2}}