Reduce number of clones in the library

3 files changed, 20 insertions, 18 deletions

diff --git a/src/model/guild/mod.rs b/src/model/guild/mod.rs
index 9a51956..142fc73 100644
--- a/src/model/guild/mod.rs
+++ b/src/model/guild/mod.rs
@@ -32,6 +32,8 @@ use builder::{EditGuild, EditMember, EditRole};
 use constants::LARGE_THRESHOLD;
 #[cfg(feature = "model")]
 use std;
+#[cfg(feature = "model")]
+use std::borrow::Cow;
 
 /// A representation of a banning of a user.
 #[derive(Clone, Debug, Deserialize, Eq, PartialEq, Hash, Serialize)]
@@ -900,23 +902,23 @@ impl Guild {
                     let name_a = match a.nick {
                         Some(ref nick) => {
                             if contains_case_insensitive(&a.user.read().name[..], prefix) {
-                                a.user.read().name.clone()
+                                Cow::Owned(a.user.read().name.clone())
                             } else {
-                                nick.clone()
+                                Cow::Borrowed(nick)
                             }
                         },
-                        None => a.user.read().name.clone(),
+                        None => Cow::Owned(a.user.read().name.clone()),
                     };
 
                     let name_b = match b.nick {
                         Some(ref nick) => {
                             if contains_case_insensitive(&b.user.read().name[..], prefix) {
-                                b.user.read().name.clone()
+                                Cow::Owned(b.user.read().name.clone())
                             } else {
-                                nick.clone()
+                                Cow::Borrowed(nick)
                             }
                         },
-                        None => b.user.read().name.clone(),
+                        None => Cow::Owned(b.user.read().name.clone()),
                     };
 
                     closest_to_origin(prefix, &name_a[..], &name_b[..])
@@ -976,23 +978,23 @@ impl Guild {
                     let name_a = match a.nick {
                         Some(ref nick) => {
                             if contains_case_insensitive(&a.user.read().name[..], substring) {
-                                a.user.read().name.clone()
+                                Cow::Owned(a.user.read().name.clone())
                             } else {
-                                nick.clone()
+                                Cow::Borrowed(nick)
                             }
                         },
-                        None => a.user.read().name.clone(),
+                        None => Cow::Owned(a.user.read().name.clone()),
                     };
 
                     let name_b = match b.nick {
                         Some(ref nick) => {
                             if contains_case_insensitive(&b.user.read().name[..], substring) {
-                                b.user.read().name.clone()
+                                Cow::Owned(b.user.read().name.clone())
                             } else {
-                                nick.clone()
+                                Cow::Borrowed(nick)
                             }
                         },
-                        None => b.user.read().name.clone(),
+                        None => Cow::Owned(b.user.read().name.clone()),
                     };
 
                     closest_to_origin(substring, &name_a[..], &name_b[..])
@@ -1081,16 +1083,16 @@ impl Guild {
                 .sort_by(|a, b| {
                     let name_a = match a.nick {
                         Some(ref nick) => {
-                            nick.clone()
+                            Cow::Borrowed(nick)
                         },
-                        None => a.user.read().name.clone(),
+                        None => Cow::Owned(a.user.read().name.clone()),
                     };
 
                     let name_b = match b.nick {
                         Some(ref nick) => {
-                                nick.clone()
+                                Cow::Borrowed(nick)
                             },
-                        None => b.user.read().name.clone(),
+                        None => Cow::Owned(b.user.read().name.clone()),
                     };
 
                     closest_to_origin(substring, &name_a[..], &name_b[..])
diff --git a/src/voice/audio.rs b/src/voice/audio.rs
index 24a4fcd..21f8f31 100644
--- a/src/voice/audio.rs
+++ b/src/voice/audio.rs
@@ -24,7 +24,7 @@ pub trait AudioReceiver: Send {
                     data: &[i16]);
 }
 
-#[derive(Clone)]
+#[derive(Clone, Copy)]
 pub enum AudioType {
     Opus,
     Pcm,
diff --git a/src/voice/streamer.rs b/src/voice/streamer.rs
index 99be4de..a0334f3 100644
--- a/src/voice/streamer.rs
+++ b/src/voice/streamer.rs
@@ -25,7 +25,7 @@ struct InputSource<R: Read + Send + 'static> {
 impl<R: Read + Send> AudioSource for InputSource<R> {
     fn is_stereo(&mut self) -> bool { self.stereo }
 
-    fn get_type(&self) -> AudioType { self.kind.clone() }
+    fn get_type(&self) -> AudioType { self.kind }
 
     fn read_pcm_frame(&mut self, buffer: &mut [i16]) -> Option<usize> {
         for (i, v) in buffer.iter_mut().enumerate() {