Go fix

Author: SteveSandersonMS

go/rpc/result_union.go

@@ -0,0 +1,35 @@
+package rpc
+
+import "encoding/json"
+
+// MarshalJSON serializes ResultUnion as the appropriate JSON variant:
+// a plain string when String is set, or the ResultResult object otherwise.
+// The generated struct has no custom marshaler, so without this the Go
+// struct fields would serialize as {"ResultResult":...,"String":...}
+// instead of the union the server expects.
+func (r ResultUnion) MarshalJSON() ([]byte, error) {
+	if r.String != nil {
+		return json.Marshal(*r.String)
+	}
+	if r.ResultResult != nil {
+		return json.Marshal(*r.ResultResult)
+	}
+	return []byte("null"), nil
+}
+
+// UnmarshalJSON deserializes a JSON value into the appropriate ResultUnion variant.
+func (r *ResultUnion) UnmarshalJSON(data []byte) error {
+	// Try string first
+	var s string
+	if err := json.Unmarshal(data, &s); err == nil {
+		r.String = &s
+		return nil
+	}
+	// Try ResultResult object
+	var rr ResultResult
+	if err := json.Unmarshal(data, &rr); err == nil {
+		r.ResultResult = &rr
+		return nil
+	}
+	return nil
+}