Write missing docs and Debug implementations for native

native/src/clipboard.rs

@@ -1,4 +1,5 @@
 //! Access the clipboard.
+use std::fmt;
 
 /// A buffer for short-term storage and transfer within and between
 /// applications.
@@ -22,12 +23,19 @@ impl Clipboard for Null {
     fn write(&mut self, _contents: String) {}
 }
 
+/// A clipboard action to be performed by some [`Command`].
+///
+/// [`Command`]: crate::Command
 pub enum Action<T> {
+    /// Read the clipboard and produce `T` with the result.
     Read(Box<dyn Fn(Option<String>) -> T>),
+
+    /// Write the given contents to the clipboard.
     Write(String),
 }
 
 impl<T> Action<T> {
+    /// Maps the output of a clipboard [`Action`] using the provided closure.
     pub fn map<A>(self, f: impl Fn(T) -> A + 'static + Send + Sync) -> Action<A>
     where
         T: 'static,
@@ -38,3 +46,12 @@ impl<T> Action<T> {
         }
     }
 }
+
+impl<T> fmt::Debug for Action<T> {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        match self {
+            Self::Read(_) => write!(f, "Action::Read"),
+            Self::Write(_) => write!(f, "Action::Write"),
+        }
+    }
+}