Go fmt formats go code as source code. What is the value of emitting the go ast as json? What problem would that allow you to solve?

@davecheney I think he ment the fmt package and wnats something like fmt.Printf("%json", v)
That does something like:

b, err := json.Marshal(v)
if err != nil {
	fmt.Println("error:", err)
}
fmt.Printf("%s", string(b))

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