doc-src/TutorialI/Trie/Option2.thy
author wenzelm
Mon, 28 Aug 2000 20:29:56 +0200
changeset 9703 bf65780eed02
parent 8771 026f37a86ea7
permissions -rw-r--r--
added 'split' method;

(*<*)
theory Option2 = Main:;
(*>*)

datatype 'a option = None | Some 'a;
(*<*)
end
(*>*)