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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 19.3.8, p. III-95.
+% Original source in file "tokens2.TEX", starting line 1371.
+\wlog{L: "cref-3a.tip" ["tokens2.TEX," l. 1371, p. III-95]}%
+% This file DOES NOT belong to format "texip."
+\InputD{pickfs.tip}
+\InputD{namedef.tip}
+\InputD{defauarg.tip}
+\catcode`\@ = 11
+\def\Ref #1{\@ref{0}{#1}}
+\def\PageRef #1{\@ref{1}{#1}}
+\def\@MostRecentLabel{}
+\def\@ref #1#2{%
+ \DefaultArg
+ {\@ThisLabel}%
+ {#2}%
+ {\@MostRecentLabel}%
+ \xdef\@MostRecentLabel{\@ThisLabel}%
+ \if\NameDefinedConditional{@REF-\@ThisLabel}%
+ \edef\@CrefTemp{\NameUse{@REF-\@ThisLabel}}%
+ \ifcase #1\relax
+ \expandafter\PickFirstOfTwo\@CrefTemp
+ \or
+ \expandafter\PickSecondOfTwo\@CrefTemp
+ \fi
+ \else
+ {\bf ??}%
+ \wlog{Label \@ThisLabel\space undefined.}%
+ \fi
+}
+\catcode`\@ = 12