%%
%% This is file `stack.sty',
%% generated with the docstrip utility.
%%
%% The original source files were:
%%
%% stack.dtx  (with options: `package')
%% 
%% IMPORTANT NOTICE:
%% 
%% For the copyright see the source file.
%% 
%% Any modified versions of this file must be renamed
%% with new filenames distinct from stack.sty.
%% 
%% For distribution of the original source see the terms
%% for copying and modification in the file stack.dtx.
%% 
%% This generated file may be distributed as long as the
%% original source files, as listed above, are part of the
%% same distribution. (The sources need not necessarily be
%% in the same archive or directory.)
%% \CharacterTable
%%  {Upper-case    \A\B\C\D\E\F\G\H\I\J\K\L\M\N\O\P\Q\R\S\T\U\V\W\X\Y\Z
%%   Lower-case    \a\b\c\d\e\f\g\h\i\j\k\l\m\n\o\p\q\r\s\t\u\v\w\x\y\z
%%   Digits        \0\1\2\3\4\5\6\7\8\9
%%   Exclamation   \!     Double quote  \"     Hash (number) \#
%%   Dollar        \$     Percent       \%     Ampersand     \&
%%   Acute accent  \'     Left paren    \(     Right paren   \)
%%   Asterisk      \*     Plus          \+     Comma         \,
%%   Minus         \-     Point         \.     Solidus       \/
%%   Colon         \:     Semicolon     \;     Less than     \<
%%   Equals        \=     Greater than  \>     Question mark \?
%%   Commercial at \@     Left bracket  \[     Backslash     \\
%%   Right bracket \]     Circumflex    \^     Underscore    \_
%%   Grave accent  \`     Left brace    \{     Vertical bar  \|
%%   Right brace   \}     Tilde         \~}
\ProvidesPackage{stack}[2002/01/20 v1.0 Multi-stack system]
\newcount\tmp@stack
\newcommand\NewStack[2]{%
  \expandafter\gdef\csname #1@count\endcsname{0}%
  \expandafter\do@stack@macro\csname #1@count\endcsname{#1}{#2}%
}
\newcommand\do@stack@macro[3]{%
  \expandafter\newcommand\expandafter*%
  \csname stack@#2\endcsname{%
    \expandafter\ifx\csname #2@\romannumeral#1\endcsname\relax
      #3%
    \else
      \csname #2@\romannumeral#1\endcsname
    \fi
  }%
}
\newcommand\Stack[1]{%
  \ifx\csname #1@count\endcsname\relax
    \PackageError{stack}{Undefined stack #1}{You should first create the
    stack with \NewStack}%
  \else
    \csname stack@#1\endcsname
  \fi
}
\newcommand\Push[2]{%
  \ifx\csname #1@count\endcsname\relax
    \PackageError{stack}{Undefined stack #1}{You should first create the
    stack with \NewStack}%
  \else
    \edef\stack@newtop{#2}%
    \tmp@stack\csname #1@count\endcsname\relax
    \global\advance\tmp@stack by 1\relax
    \expandafter\xdef\csname #1@count\endcsname{\the\tmp@stack}%
    \expandafter\xdef\csname #1@\romannumeral\tmp@stack\endcsname
      {\stack@newtop}%
  \fi
}
\newcommand\Pop[1]{%
  \ifx\csname #1@count\endcsname\relax
    \PackageError{stack}{Undefined stack #1}{You should first create the
    stack with \NewStack}%
  \else
    \tmp@stack\csname #1@count\endcsname\relax
    \ifnum\tmp@stack>0\relax
      \advance\tmp@stack by -1\relax
      \expandafter\xdef\csname #1@count\endcsname{\the\tmp@stack}%
    \fi
  \fi
}
\newcommand\ShowTop[1]{%
  {\edef\top{\Stack{#1}}%
   \typeout{The top of #1: \top}}}
\endinput
%%
%% End of file `stack.sty'.
