doc-src/Tutorial/Misc/Tree.thy
author wenzelm
Thu, 29 Jun 2000 22:31:29 +0200
changeset 9194 a57987e0250b
parent 5377 efb799c5ed3c
permissions -rw-r--r--
added add_method;

Tree = Main +
datatype 'a tree = Tip | Node ('a tree) 'a ('a tree)
end