pub trait Duplex { }Expand description
A trait which indicates a type represents a duplex communication channel, meaning it’s bidirectional and may be used in an interactive manner.
For example, TcpStream is Duplex, however File is not, because
even though File is readable and writable, normal files do not have
independent input and output channels; they share a current-position
pointer. CharDevice is a special kind of file which is Duplex.
Types should implment this, and implementations of HalfDuplex and
FullDuplex (enabled with the “futures-io” cargo feature) will be
provided by blanket implementations.