Function to_string

cpp/src/transfer.cpp:50–50

enum transfer::state transfer::state() const { return static_cast<enum state>(pn_delivery_remote_state(pn_object())); }

std::string to_string(enum transfer::state s) { return pn_disposition_type_name(s); }
std::ostream& operator<<(std::ostream& o, const enum transfer::state s) { return o << to_string(s); }

void transfer::user_data(void* user_data) const {