RegisterTypeEncoderFunc isEmptyFunc never called

[kimmykong]

When I pass an isEmptyFuncfunction to RegisterTypeEncoderFunc, my isEmptyFuncis never called. My EncoderFuncfor the type does get called. Request is for the isEmptyFuncto be called.

My data looks like this, where TypeCis an array that can have empty bytes saved. When I use jsoniter.RegisterFieldEncoderFunc(reflect2.TypeOf(TypeB{}).String(), "TypeC", encodeB, isBEmpty), both encodeBand isBEmpty functions get called, but I lose the support for array type and can't parse out the empty []byte

type TypeA struct {
    TypeB TypeB
}

type TypeB struct {
    TypeC []TypeC `msgpack:"as_array" json:"omitempty"`
}

type TypeC []byte

func fun() {
    jsoniter.RegisterTypeEncoderFunc(reflect2.TypeOf(TypeC{}).String(), encodeFunc, isEmptyFunc)
}