Mario de Sousa <msousa@fe.up.pt> [Thu, 18 Oct 2012 10:57:13 +0100] rev 681
Do not repeat narrow algorithm for ST code, and better comments.
Mario de Sousa <msousa@fe.up.pt> [Tue, 16 Oct 2012 18:56:03 +0100] rev 680
New visitor classes missing from previous commit.