4 files changed, 15 insertions, 17 deletions

diff --git a/planetwars-rules/src/config.rs b/planetwars-rules/src/config.rs
index 57c77eb..14a4ac2 100644
--- a/planetwars-rules/src/config.rs
+++ b/planetwars-rules/src/config.rs
@@ -25,8 +25,8 @@ impl Config {
             .collect();
 
         PwState {
-            players: players,
-            planets: planets,
+            players,
+            planets,
             expeditions: Vec::new(),
             expedition_num: 0,
             turn_num: 0,
@@ -37,8 +37,7 @@ impl Config {
     fn load_map(&self, num_players: usize) -> Vec<Planet> {
         let map = self.read_map().expect("[PLANET_WARS] reading map failed");
 
-        return map
-            .planets
+        map.planets
             .into_iter()
             .enumerate()
             .map(|(num, planet)| {
@@ -55,27 +54,26 @@ impl Config {
                 });
                 if planet.ship_count > 0 {
                     fleets.push(Fleet {
-                        owner: owner,
+                        owner,
                         ship_count: planet.ship_count,
                     });
                 }
-                return Planet {
+                Planet {
                     id: num,
                     name: planet.name,
                     x: planet.x,
                     y: planet.y,
-                    fleets: fleets,
-                };
+                    fleets,
+                }
             })
-            .collect();
+            .collect()
     }
 
     fn read_map(&self) -> io::Result<Map> {
         let mut file = File::open(&self.map_file)?;
         let mut buf = String::new();
         file.read_to_string(&mut buf)?;
-        let map = serde_json::from_str(&buf)?;
-        return Ok(map);
+        Ok(serde_json::from_str(&buf)?)
     }
 }
 
diff --git a/planetwars-rules/src/lib.rs b/planetwars-rules/src/lib.rs
index 48034ee..26382f1 100644
--- a/planetwars-rules/src/lib.rs
+++ b/planetwars-rules/src/lib.rs
@@ -50,7 +50,7 @@ impl PlanetWars {
         serializer::serialize_rotated(&self.state, player_id - 1)
     }
 
-    pub fn state<'a>(&'a self) -> &'a PwState {
+    pub fn state(&self) -> &PwState {
         &self.state
     }
 
@@ -62,7 +62,7 @@ impl PlanetWars {
     ) -> Result<(), CommandError> {
         let dispatch = self.parse_command(player_num, cmd)?;
         self.state.dispatch(&dispatch);
-        return Ok(());
+        Ok(())
     }
 
     /// Check the given command for validity.
diff --git a/planetwars-rules/src/rules.rs b/planetwars-rules/src/rules.rs
index 587098f..e339b4e 100644
--- a/planetwars-rules/src/rules.rs
+++ b/planetwars-rules/src/rules.rs
@@ -128,7 +128,7 @@ impl PwState {
 
     pub fn is_finished(&self) -> bool {
         let remaining = self.players.iter().filter(|p| p.alive).count();
-        return remaining < 2 || self.turn_num >= self.max_turns;
+        remaining < 2 || self.turn_num >= self.max_turns
     }
 
     pub fn living_players(&self) -> Vec<usize> {
@@ -187,6 +187,6 @@ impl Planet {
     fn distance(&self, other: &Planet) -> u64 {
         let dx = self.x - other.x;
         let dy = self.y - other.y;
-        return (dx.powi(2) + dy.powi(2)).sqrt().ceil() as u64;
+        (dx.powi(2) + dy.powi(2)).sqrt().ceil() as u64
     }
 }
diff --git a/planetwars-rules/src/serializer.rs b/planetwars-rules/src/serializer.rs
index 7eb2e01..22ba52e 100644
--- a/planetwars-rules/src/serializer.rs
+++ b/planetwars-rules/src/serializer.rs
@@ -20,7 +20,7 @@ struct Serializer<'a> {
 impl<'a> Serializer<'a> {
     fn new(state: &'a PwState, offset: usize) -> Self {
         Serializer {
-            state: state,
+            state,
             player_num_offset: offset,
         }
     }
@@ -49,7 +49,7 @@ impl<'a> Serializer<'a> {
         let num_players = self.state.players.len();
         let rotated_id = (player_id + num_players - self.player_num_offset) % num_players;
         // protocol player ids start at 1
-        return rotated_id + 1;
+        rotated_id + 1
     }
 
     fn serialize_planet(&self, planet: &Planet) -> proto::Planet {