add 'id' field to Node

correct reverse/clone/topsort functions

1 files changed, 1 insertions, 0 deletions

diff --git a/Node.lua b/Node.lua
index 84c52a5..459f9a8 100644
--- a/Node.lua
+++ b/Node.lua
@@ -13,6 +13,7 @@ local Node = torch.class('graph.Node')
 
 function Node:__init(d,p)
 	self.data = d
+	self.id = 0
 	self.children = {}
 	self.visited = false
 	self.marked = false