func graphviz(m match.Matcher, id string) string {
buf := &bytes.Buffer{}
switch matcher := m.(type) {
case match.BTree:
fmt.Fprintf(buf, `"%s"[label="%s"];`, id, matcher.Value.String())
for _, m := range []match.Matcher{matcher.Left, matcher.Right} {
switch n := m.(type) {
case nil:
rnd := rand.Int63()
fmt.Fprintf(buf, `"%x"[label="<nil>"];`, rnd)
fmt.Fprintf(buf, `"%s"->"%x";`, id, rnd)
default:
sub := fmt.Sprintf("%x", rand.Int63())
fmt.Fprintf(buf, `"%s"->"%s";`, id, sub)
fmt.Fprintf(buf, graphviz(n, sub))
}
}
case match.AnyOf:
fmt.Fprintf(buf, `"%s"[label="AnyOf"];`, id)
for _, m := range matcher.Matchers {
rnd := rand.Int63()
fmt.Fprintf(buf, graphviz(m, fmt.Sprintf("%x", rnd)))
fmt.Fprintf(buf, `"%s"->"%x";`, id, rnd)
}
case match.EveryOf:
fmt.Fprintf(buf, `"%s"[label="EveryOf"];`, id)
for _, m := range matcher.Matchers {
rnd := rand.Int63()
fmt.Fprintf(buf, graphviz(m, fmt.Sprintf("%x", rnd)))
fmt.Fprintf(buf, `"%s"->"%x";`, id, rnd)
}
default:
fmt.Fprintf(buf, `"%s"[label="%s"];`, id, m.String())
}
return buf.String()
}
