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doc-src/TutorialI/Trie/Option2.thy
author
wenzelm
Thu, 19 Oct 2000 21:21:20 +0200
changeset 10274
130ff5eb2b80
parent 8771
026f37a86ea7
permissions
-rw-r--r--
added Tools/induct_attrib.ML;
(*<*)
theory Option2 = Main:;
(*>*)
datatype 'a option = None | Some 'a;
(*<*)
end
(*>*)