func formatCapDescriptor(w io.Writer, c rpccapnp.CapDescriptor) {
switch c.Which() {
case rpccapnp.CapDescriptor_Which_none:
fmt.Fprint(w, "none")
case rpccapnp.CapDescriptor_Which_senderHosted:
fmt.Fprintf(w, "sender-hosted %d", c.SenderHosted())
case rpccapnp.CapDescriptor_Which_senderPromise:
fmt.Fprintf(w, "sender promise %d", c.SenderPromise())
case rpccapnp.CapDescriptor_Which_receiverHosted:
fmt.Fprintf(w, "receiver-hosted %d", c.ReceiverHosted())
case rpccapnp.CapDescriptor_Which_receiverAnswer:
ans, _ := c.ReceiverAnswer()
fmt.Fprint(w, "receiver answer ")
formatPromisedAnswer(w, ans)
case rpccapnp.CapDescriptor_Which_thirdPartyHosted:
fmt.Fprint(w, "third-party hosted")
default:
fmt.Fprintf(w, "UNKNOWN CAPABILITY which=%v", c.Which())
}
}
