doc-src/Tutorial/Misc/Tree.thy
author wenzelm
Thu, 29 Nov 2001 01:51:38 +0100
changeset 12326 b4e706774e96
parent 5377 efb799c5ed3c
permissions -rw-r--r--
export primitive netpairs; activate attributes;

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