graphviz

func Walk ¶

func Walk(in string, n tsl.Node, nodeID string) (out string, err error)

Walk travel the TSL tree to create Graphviz dot nodes.

Users can call the Walk method to get the dot file graph string.

s, err = graphviz.Walk("", tree, "")

The return string will be a node list for a .dot file:

tcuA [shape=box color=black label="$eq"]
xhxK [shape=record color=red label="$ident | 'city'" ]
QFDa [shape=record color=blue label="$string | 'rome'" ]
tcuA -> { xhxK, QFDa }

For valid Graphviz dot file, the nodes must be wrapped in a `digraph` object:

 	s, err = graphviz.Walk("", tree, "")
	s = fmt.Sprintf("digraph {\n%s\n}\n", s)