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doc-src/TutorialI/Trie/document/Option2.tex
author
paulson
Fri, 26 May 2000 18:04:17 +0200
changeset 8983
15bd7d568fb2
parent 8771
026f37a86ea7
child 9145
9f7b8de5bfaf
permissions
-rw-r--r--
named the primrec clauses of upt
\begin{isabelle}%
\isanewline
\isacommand{datatype}~'a~option~=~None~|~Some~'a\end{isabelle}%