doc-src/TutorialI/Trie/document/Option2.tex
author wenzelm
Wed, 02 Aug 2000 19:40:14 +0200
changeset 9502 50ec59aff389
parent 9145 9f7b8de5bfaf
child 9521 c396d1092430
permissions -rw-r--r--
adapted deriv;

\begin{isabelle}%
\isanewline
\isacommand{datatype}~'a~option~=~None~|~Some~'a\end{isabelle}%
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