% 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 19.1.8, p. III-73.
% Original source in file "tokens2.TEX", starting line 414.
\wlog{L: "namedef.tip" ["tokens2.TEX," l. 414, p. III-73]}%
% This file DOES belong to format "texip."
\catcode`\@ = 11
\def\NameDef #1{% 
    \expandafter\def\csname #1\endcsname
}
\def\NameEdef #1{%
    \expandafter\edef\csname #1\endcsname
}
\def\NameGdef #1{% 
    \expandafter\gdef\csname #1\endcsname
}
\def\NameXdef #1{% 
    \expandafter\xdef\csname #1\endcsname
}
\def\NameNewDef #1{% 
    \if\NameDefinedConditional{#1}% 
        \errmessage{\string\NameNewDef: "#1" already defined.}% 
    \fi
    \NameDef{#1}% 
}
\def\NameReDef #1{% 
    \if\NameDefinedConditional{#1}%
    \else
        \errmessage{\string\NameReDef: "#1" never defined before.}% 
    \fi
    \NameDef{#1}% 
}
\def\NameUse #1{\csname #1\endcsname}
\def\NameUseFlagUndefined #1{% 
    \if\NameDefinedConditional{#1}%
        \NameUse{#1}%
    \else
        \errmessage{\string\NameUseFlagUndefined: token "#1"
            is undefined.}%
    \fi
}
\newif\if@NameDefined
\def\NameDefinedConditional #1{% 
    TT\fi
    \expandafter\ifx\csname #1\endcsname \relax
        \@NameDefinedfalse
    \else
        \@NameDefinedtrue
    \fi
    \if@NameDefined
}
\catcode`\@ = 12