1 files changed, 32 insertions, 0 deletions

diff --git a/walk/walk.go b/walk/walk.go
index 1df7a6e..30bfb29 100644
--- a/walk/walk.go
+++ b/walk/walk.go
@@ -19,19 +19,47 @@ const (
 func (value TerminalValue) Pieces(out chan<- Datum) {
 	out<-value
 }
+func (value TerminalValue) String() string {
+	switch value {
+		case ArrayBegin:
+			return "["
+		case ArrayEnd:
+			return "]"
+		case MapBegin:
+			return "{"
+		case MapEnd:
+			return "}"
+		default:
+			panic("Unknown TerminalValue")
+	}
+}
 
 type ValueNull struct {}
 func (value ValueNull) Pieces(out chan<- Datum) {
 	out<-value
 }
+func (value ValueNull) String() string {
+	return "null"
+}
 type ValueBool bool
 func (value ValueBool) Pieces(out chan<- Datum) {
 	out<-value
 }
+func (value ValueBool) String() string {
+	if value {
+		return "true"
+	} else {
+		return "false"
+	}
+}
 type ValueNumber float64
 func (value ValueNumber) Pieces(out chan<- Datum) {
 	out<-value
 }
+func (value ValueNumber) String() string {
+	v := float64(value)
+	return fmt.Sprintf("%f", v)
+}
 
 type StartString struct {}
 type EndString struct {}
@@ -43,11 +71,15 @@ func (value ValueString) Pieces(out chan<- Datum) {
 	}
 	out<-EndString{}
 }
+func (value ValueString) String() string {
+	return fmt.Sprintf("\"%s\"", string(value))
+}
 
 type Datum interface {}
 
 type WalkValue interface {
 	Pieces(out chan<- Datum)
+	String() string
 }
 
 type WalkItem struct {