.

wcfs/δbtail.go

@@ -527,6 +527,17 @@ func (rc rangeCover) Get(k Key) *nodeInRange {
 	return rn
 }
 
+func (rc rangeCover) String() string {
+	s := ""
+	for _, rn := range rc {
+		if s != "" {
+			s += " "
+		}
+		s += fmt.Sprintf("[%v,%v]%s", rn.lo, rn.hi_, vnode(rn.node))
+	}
+	return s
+}
+
 
 
 // treediff computes δT for tree specified by root in between old..new.
@@ -1078,16 +1089,19 @@ func vtree(v []TreeEntry) string {
 		if s != "" {
 			s += " "
 		}
-		c := e.Child()
-		ckind := "?"
-		switch c.(type) {
-		case *Tree:   ckind = "T"
-		case *Bucket: ckind = "B"
+		s += fmt.Sprintf("%v %s", e.Key(), vnode(e.Child()))
 	}
+	return s
+}
 
-		s += fmt.Sprintf("%v %s%s", e.Key(), ckind, c.POid())
+// vnode returns brief huan-readable representation of node.
+func vnode(node Node) string {
+	kind := "?"
+	switch node.(type) {
+	case *Tree:   kind = "T"
+	case *Bucket: kind = "B"
 	}
-	return s
+	return fmt.Sprintf("%s%s", kind, node.POid())
 }