doc-src/Tutorial/Misc/Tree.thy
author wenzelm
Fri, 05 Feb 1999 21:11:41 +0100
changeset 6249 8bb90076cc7c
parent 5377 efb799c5ed3c
permissions -rw-r--r--
Session.use_dir: check parent;

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