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% This macro source file is from the four volume series
% "TeX in Practice" by Stephan von Bechtolsheim, published
% 1993 by Springer-Verlag, New York.
% Copyright 1993 Stephan von Bechtolsheim.
% No warranty or liability is assumed.
% This macro may be copied freely if no fees other than
% media cost or shipping charges are charged and as long
% as this copyright and the following source code itself
% is not changed. Please see the series for further information.
%
% Version: 1.0
% Date: May 1, 1993
%
%
% This source code is documented in 28.5.7, p. III-481.
% Original source in file "io1.TEX", starting line 1716.
\wlog{L: "robust.tip" ["io1.TEX," l. 1716, p. III-481]}%
% This file DOES belong to format "texip."
\InputD{fotok.tip}
\catcode`\@ = 11
\def\MakeRobust{}
\def\TreatAsRobust #1{%
    \def #1{%
        \noexpand #1% 
    }%
}
\newtoks\@RobustTokenList
\@RobustTokenList = {}
\def\AddToRobustList #1{%
    \@RobustTokenList = \expandafter{\the\@RobustTokenList #1}% 
}
\def\Robusting{%
    \ForEachToken{\@RobustTokenList}{\TreatAsRobust}%
}
\catcode`\@ = 12