doc-src/Tutorial/Misc/Tree.thy
author ballarin
Wed, 10 Dec 2003 14:29:44 +0100
changeset 14287 f630017ed01c
parent 5377 efb799c5ed3c
permissions -rw-r--r--
Isar: where attribute supports instantiation of type variables.

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