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doc-src/TutorialI/Trie/Option2.thy
author
wenzelm
Thu, 19 Oct 2000 01:48:26 +0200
changeset 10269
cc20c9d7e682
parent 8771
026f37a86ea7
permissions
-rw-r--r--
use RecdefPackage.tcs_of;
(*<*)
theory Option2 = Main:;
(*>*)
datatype 'a option = None | Some 'a;
(*<*)
end
(*>*)