doc-src/Tutorial/Misc/Tree.thy
author wenzelm
Wed, 13 Oct 1999 19:42:12 +0200
changeset 7854 fe7b7e3c3ddc
parent 5377 efb799c5ed3c
permissions -rw-r--r--
use_text_verbose;

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