doc-src/TutorialI/Trie/document/Option2.tex
author wenzelm
Fri, 05 May 2000 22:02:46 +0200
changeset 8806 a202293db3f6
parent 8771 026f37a86ea7
child 9145 9f7b8de5bfaf
permissions -rw-r--r--
GPLed;

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