int sync() override;
First, records that a flush is pending, by updating the appropriate private flag.
Then, if the current emit-on-sync policy is true, makes a call to emit().
Otherwise (if the emit-on-sync policy is false, which is the default), the flush is suspended until emit() is called, such as through std::basic_osyncstream::emit() or std::basic_osyncstream::~basic_osyncstream
sync() or its equivalent is implicitly called by close(), seekoff(), and seekpos() and explicitly called by std::basic_streambuf::pubsync()
|This section is incomplete|
Reason: no example
 See also
| synchronizes the buffers with the associated character sequence |
(virtual protected member function of
| calls emit on the underlying basic_syncbuf to transmit its internal data to the final destination |
(public member function of