From e0c6872cf40896c7be36b11dcc744620f10adf1d Mon Sep 17 00:00:00 2001
From: Norbert Preining <norbert@preining.info>
Date: Mon, 2 Sep 2019 13:46:59 +0900
Subject: Initial commit

---
 info/examples/tip/cref-5.tip | 52 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 52 insertions(+)
 create mode 100644 info/examples/tip/cref-5.tip

(limited to 'info/examples/tip/cref-5.tip')

diff --git a/info/examples/tip/cref-5.tip b/info/examples/tip/cref-5.tip
new file mode 100644
index 0000000000..68ee426f6c
--- /dev/null
+++ b/info/examples/tip/cref-5.tip
@@ -0,0 +1,52 @@
+% 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 19.3.10, p. III-96.
+% Original source in file "tokens2.TEX", starting line 1462.
+\wlog{L: "cref-5.tip" ["tokens2.TEX," l. 1462, p. III-96]}%
+% This file DOES NOT belong to format "texip."
+\InputD{gobble.tip}
+\InputD{input-at.tip}
+\catcode`\@ = 11
+\newif\if@LabelOk
+\def\CheckLabels{% 
+    \@LabelOktrue
+    \def\@NewLabel ##1##2##3{%
+        \def\@CrefTemp{{##2}{##3}}%
+        \if\NameDefinedConditional{@REF-##1}%
+            \edef\@@CrefTemp{\NameUse{@REF-##1}}%
+            \ifx\@CrefTemp\@@CrefTemp
+                \let\@CrefNext = \relax
+            \else
+                \let\@CrefNext = \@StopCheckingLabels
+            \fi
+        \else
+            \let\@CrefNext = \@StopCheckingLabels
+        \fi
+        \@CrefNext
+    }%
+    \InputAt{\jobname.lab}%
+    \if@LabelOk
+        \wlog{\string\CheckLabels: labels are ok.}%
+    \else
+        \wlog{\string\CheckLabels: labels CHANGED between
+            preceding and this run.}%
+        \wlog{Reprocess document.}%
+    \fi
+}
+\def\@StopCheckingLabels{% 
+    \@LabelOkfalse
+    \let\@NewLabel = \GobbleThree
+}
+\catcode`\@ = 12
-- 
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