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doc-src/TutorialI/Trie/Option2.thy
author
paulson
Fri, 26 May 2000 18:04:17 +0200
changeset 8983
15bd7d568fb2
parent 8771
026f37a86ea7
permissions
-rw-r--r--
named the primrec clauses of upt
(*<*)
theory Option2 = Main:;
(*>*)
datatype 'a option = None | Some 'a;
(*<*)
end
(*>*)