--- a/doc-src/TutorialI/Trie/Option2.thy Wed Nov 29 18:42:40 2000 +0100 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000 @@ -1,8 +0,0 @@ -(*<*) -theory Option2 = Main:; -(*>*) - -datatype 'a option = None | Some 'a; -(*<*) -end -(*>*)