I want to convert a map[int]string
to json
, so I thought json.Marshal()
would do the trick, but it fails saying unsupported type map[int]string
. But whereas if I use a map
with key string it works fine.
http://play.golang.org/p/qhlS9Nt8qQ
Later on inspection of the marshaller code, there is an explicit check to see if the key is not string and returns UnsupportedTypeError
...
Why can't I even use primitives as keys? If json standard doesn't allow non string keys, shouldn't json.Marshal
convert the primitives to string and use them as keys ?