Add Copy derives where possible

Add a Copy derive to all structures that allow it for easier
semantics. Copy requires Clone, so add it as well where needed. While
we are at it, add the #![deny(missing_copy_implementations)] lint to
prevent future additions of types that do not derive Copy when they
could.

Signed-off-by: Carlos López <[email protected]>

Author: 00xc

vm-superio/CHANGELOG.md

@@ -7,6 +7,7 @@
 - Added a `reset_evt` to the `I8042Device` type to retrieve the underlying
   reset event object.
 - Added three methods to `Serial` to retrieve the `Write` output object.
+- Derived the `Copy` trait for `RtcState` and other auxiliary types.
 
 # v0.7.0
 

vm-superio/src/lib.rs

@@ -16,6 +16,7 @@
 //! that can generate an event.
 
 #![deny(missing_docs)]
+#![deny(missing_copy_implementations)]
 
 pub mod i8042;
 pub mod rtc_pl031;

vm-superio/src/rtc_pl031.rs

@@ -56,7 +56,7 @@ pub trait RtcEvents {
 /// Provides a no-op implementation of `RtcEvents` which can be used in situations that
 /// do not require logging or otherwise doing anything in response to the events defined
 /// as part of `RtcEvents`.
-#[derive(Debug)]
+#[derive(Debug, Clone, Copy)]
 pub struct NoEvents;
 
 impl RtcEvents for NoEvents {
@@ -140,7 +140,7 @@ pub struct Rtc<EV: RtcEvents> {
 }
 
 /// The state of the Rtc device.
-#[derive(Clone, Debug, Eq, PartialEq)]
+#[derive(Clone, Copy, Debug, Eq, PartialEq)]
 pub struct RtcState {
     /// The load register.
     pub lr: u32,

vm-superio/src/serial.rs

@@ -125,7 +125,7 @@ pub trait SerialEvents {
 /// Provides a no-op implementation of `SerialEvents` which can be used in situations that
 /// do not require logging or otherwise doing anything in response to the events defined
 /// as part of `SerialEvents`.
-#[derive(Debug)]
+#[derive(Debug, Clone, Copy)]
 pub struct NoEvents;
 
 impl SerialEvents for NoEvents {