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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 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
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