encoding/dot: set DOT node ID before adding node to graph
This makes it possible to implement the AddNode method of
graph.NodeAdder to track the nodes of a graph by DOT node
ID, as they are added.
@@ -153,10 +153,10 @@ func (gen *generator) node(dst graph.NodeAdder, id string) graph.Node {
return n
}
n := dst.NewNode()
- dst.AddNode(n)
if n, ok := n.(DOTIDSetter); ok {
n.SetDOTID(id)
}
+ dst.AddNode(n)
gen.ids[id] = n
// Check if within the context of a subgraph, that is to be used as a vertex
// of an edge.
