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doc-src/TutorialI/Trie/document/Option2.tex
author wenzelm
Thu, 27 Jul 2000 18:25:01 +0200
changeset 9451 5c25ed3c10a0
parent 9145 9f7b8de5bfaf
child 9521 c396d1092430
permissions -rw-r--r--
begin_theory: store *copy* of initial theory;

\begin{isabelle}%
\isanewline
\isacommand{datatype}~'a~option~=~None~|~Some~'a\end{isabelle}%
%%% Local Variables:
%%% mode: latex
%%% TeX-master: "root"
%%% End:
isabelle