%%% ====================================================================
%%%  @LaTeX-style-file{
%%%     filename        = "xspace.sty",
%%%     version         = "1.01",
%%%     date            = "26 June 1992",
%%%     time            = "15:49:24 BST",
%%%     author          = "David Carlisle",
%%%     address         = "Computer Science Department
%%%                        Manchester University
%%%                        Oxford Road
%%%                        Manchester
%%%                        England
%%%                        M13 9PL",
%%%     telephone       = "+44 61 275 6139",
%%%     FAX             = "+44 61 275 6236",
%%%     checksum        = "21651 151 697 5343",
%%%     email           = "carlisle@cs.man.ac.uk (Internet)",
%%%     codetable       = "ISO/ASCII",
%%%     keywords        = "LaTeX, spaces",
%%%     supported       = "yes",
%%%     docstring       = "
%%%
%%%     xspace.sty
%%%
%%%     \xspace should be used at the end of a macro designed to be used
%%%     mainly in text. It adds a space unless the macro is followed by
%%%     certain punctuation characters.
%%%
%%%     The checksum field above was produced by
%%%     Robert Solovay's checksum utility.",
%%%  }
%%% ====================================================================
%
% Version 1.00 30 August 1991
% Version 1.01 26 June 1992, Re-issue for the ne doc and docstrip.
%
% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%<*x>
% This file may be used without modification as a style (.sty) file.
%
% If you have Mittelbach's doc.sty, this file may be formatted with a
% command like:
%                latex xspace.sty
%
% If you have the Mittelbach/Duchier/Braams docstrip utility, you may
% produce a faster loading .sty file.  Rename this file to: xspace.doc
% Then run this file through *plain* TeX:
%                tex xspace.doc
% This should produce the file xspace.sty.
% If you do not have plain TeX on your system, you can trick LaTeX into
% doing the work as follows:
%                latex \def\fmtname{plain} \input xspace.doc
% Note that you may need to quote the arguments here to stop your
% operating system treating the \ characters incorrectly.
%
%                latex xspace.doc
% Will produce a typeset version of the documentation, as above.
%
% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\def\plain{plain}\ifx\fmtname\plain\csname fi\endcsname
     \def\batchfile{xspace.doc}
     \input docstrip
     \preamble

     Do not distribute the stripped version of this file.
     The checksum in the header refers to the documented version.

     \endpreamble
     \generateFile{xspace.sty}{t}{\from{xspace.doc}{}}
     \endinput
\fi
%
\ifcat a\noexpand @\let\next\relax\else\def\next{%
    \documentstyle[xspace,doc]{article}\MakePercentIgnore}\fi\next
%
%\def\eatmodule<#1>{}\eatmodule
%</x>
% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% \textwidth=355pt   ^^A Allow macrocode text with 72 columns.
% \CodelineIndex     ^^A Code lines numbered.
% \DisableCrossrefs  ^^A No Cross references.
% \MakeShortVerb{\|} ^^A |\foo| works like \verb+\foo+
%
% \title{xspace.sty}
% \author{D. P. Carlisle}
% \date{26 June 1992}
% \begin{document}
% \maketitle
% \begin{abstract}
% |\xspace| should be used at the end of a macro designed to be used
% mainly in text. It adds a space unless the macro is followed by
% certain punctuation characters.
% \end{abstract}
% \section{Introduction}

% After |\newcommand{\gb}{Great Britain\xspace}|\\
% \newcommand{\gb}{Great Britain\xspace}
% |\gb is a very nice place to live.|\\
% \gb is a very nice place to live.\\
% |\gb, a small island off the coast of France.|\\
% \gb, a small island off the coast of France.
%
% |\xspace| saves the user from having to type \verb*+\ + or |{}| after
% most occurrences of a macro name in text. However if either of these
% constructions follows |\xspace|, a space is not added by |\xspace|.
% This means that it is safe to add |\xspace| to the end of an existing
% macro without making too many changes in your document.
%
% Sometimes |\xspace| may make the wrong decision, and add a space when
% it is not required. In these cases follow the macro with |{}|, as this
% has the effect of suppressing the space.
%
% \typeout{End of the Introduction and Examples.}
% \typein[\answer]%
%   {Do you want an annotated listing of the macro definitions (y/n) ?}
% \def\next{y}\ifx\answer\next\else\expandafter\stop\fi
%
% \section{The Macros}
%
% \begin{macro}{\xspace}
% |\xspace| just looks ahead, and then calls |\@xspace|.
%    \begin{macrocode}
\def\xspace{\futurelet\next\@xspace}
%    \end{macrocode}
% \end{macro}
% \begin{macro}{\@xspace}
% If the next token is one of a specified list of characters, do
% nothing, otherwise add a space. If you often use a different
% punctuation character, add the appropriate line (do not forget the
% |\fi| at the  end!)
%    \begin{macrocode}
\def\@xspace{%
  \ifx\next\bgroup\else
  \ifx\next\egroup\else
  \ifx\next\/\else
  \ifx\next\ \else
  \ifx\next~\else
  \ifx\next.\else
  \ifx\next,\else
  \ifx\next:\else
  \ifx\next;\else
  \ifx\next?\else
  \ifx\next'\else
  \ifx\next)\else
  \ifx\next-\else
   \space
   \fi\fi\fi\fi\fi\fi\fi\fi\fi\fi\fi\fi\fi}
%    \end{macrocode}
% \end{macro}
% \end{document}