Implement copy and clone for port specs.

src/port/audio.rs

@@ -21,7 +21,7 @@ use port::port_flags::{IS_INPUT, IS_OUTPUT, PortFlags};
 /// let spec = jack::port::AudioInSpec::default();
 /// let audio_in_port = client.register_port("in", spec).unwrap();
 /// ```
-#[derive(Debug, Default)]
+#[derive(Copy, Clone, Debug, Default)]
 pub struct AudioInSpec;
 
 /// `AudioOutSpec` implements the `PortSpec` trait, which defines an
@@ -37,7 +37,7 @@ pub struct AudioInSpec;
 /// let spec = jack::port::AudioInSpec::default();
 /// let audio_out_port = client.register_port("out", spec).unwrap();
 /// ```
-#[derive(Debug, Default)]
+#[derive(Copy, Clone, Debug, Default)]
 pub struct AudioOutSpec;
 
 

src/port/midi.rs

@@ -33,13 +33,13 @@ impl<'a> Default for RawMidi<'a> {
 /// `MidiInSpec` implements the `PortSpec` trait, which defines an endpoint for
 /// JACK. In this case,
 /// it defines midi input.
-#[derive(Debug, Default)]
+#[derive(Copy, Clone, Debug, Default)]
 pub struct MidiInSpec;
 
 /// `MidiOutSpec` implements the `PortSpec` trait, which defines an endpoint
 /// for JACK. In this case,
 /// it defines a midi output.
-#[derive(Debug, Default)]
+#[derive(Copy, Clone, Debug, Default)]
 pub struct MidiOutSpec;
 
 unsafe impl PortSpec for MidiInSpec {