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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