% next word parser, based on http://tex.stackexchange.com/a/11925/15107
\makeatletter
\def\consumenextword#1{%
  \begingroup
  \let\@cmd#1%
  \def\@selectedword{}%
  \consumenextword@
}

\def\consumenextword@{%
  \futurelet\ntoken\consumenextword@@
}

\def\consumenextword@@{%
  \ifcase 0%
    \ifx\ntoken\@sptoken 0\else
    \ifcat a\ntoken 1\else
    \ifcat 0\ntoken 2\fi% test of token is catcode "other"
    \fi\fi
  \relax
    \expandafter\consumenextword@end
  \or
    \expandafter\consumenextword@add
  \else
    \expandafter\consumenextword@checknum
  \fi
}

% Checks if token is a number (ASCII 48-57)
\def\consumenextword@checknum#1{%
  \ifcase 0%
    \ifnum`#1>47
    \ifnum`#1<58 1\fi\fi
  \relax
    \def\next{\consumenextword@end#1}%
  \else
    \def\next{\consumenextword@add{#1}}%
  \fi
  \next
}

\def\consumenextword@add#1{%
  \edef\@selectedword{\@selectedword#1}%
  \consumenextword@
}

\def\consumenextword@end{%
  \@cmd\@selectedword%
  \endgroup%
}
\makeatother