Extending stream Decoder in encoding/json

[hsnamed]

go version go1.5 linux/386
Debian 3.9.4-1 i686 GNU/Linux
package : encoding/json
file : stream.go

There is not enough public methods and public constants to control decode flow.
In other languages implementation of streaming processing json data is generaly based on constants token/event and methods : next() , hasNext(), getString() , getInt, getLong , getDecimal

I suggest extend and make public set of constants :

const (
    ObjectStart = iota
    ObjectEnd
    ArrayStart
    ArrayEnd
    KeyName
    ValueString
    ValueNumber
    ValueTrue
    ValueFalse
    ValueNull
)

and change method : func (dec *Decoder) Token() (Token, error) which must return only constant.

[minux]

What you're proposing is already possible with the current API. Just do a type assertion on the Token returned from the Token() method. Anyway, we can't change the API now due to Go 1 API stability guarantee.