Use `Fn` instead of `FnMut` for call results as they will be called at most once

1 files changed, 6 insertions, 6 deletions

diff --git a/src/matchmaking.rs b/src/matchmaking.rs
index ed4cd57..3145e2f 100644
--- a/src/matchmaking.rs
+++ b/src/matchmaking.rs
@@ -44,8 +44,8 @@ impl LobbyId {
 
 impl <Manager> Matchmaking<Manager> {
 
-    pub fn request_lobby_list<F>(&self, mut cb: F)
-        where F: FnMut(SResult<Vec<LobbyId>>) + 'static + Send
+    pub fn request_lobby_list<F>(&self, cb: F)
+        where F: Fn(SResult<Vec<LobbyId>>) + 'static + Send
     {
         unsafe {
             let api_call = sys::SteamAPI_ISteamMatchmaking_RequestLobbyList(self.mm);
@@ -76,8 +76,8 @@ impl <Manager> Matchmaking<Manager> {
     ///
     /// * `LobbyEnter`
     /// * `LobbyCreated`
-    pub fn create_lobby<F>(&self, ty: LobbyType, max_members: u32, mut cb: F)
-        where F: FnMut(SResult<LobbyId>) + 'static + Send
+    pub fn create_lobby<F>(&self, ty: LobbyType, max_members: u32, cb: F)
+        where F: Fn(SResult<LobbyId>) + 'static + Send
     {
         assert!(max_members <= 250); // Steam API limits
         unsafe {
@@ -104,8 +104,8 @@ impl <Manager> Matchmaking<Manager> {
     }
 
     /// Tries to join the lobby with the given ID
-    pub fn join_lobby<F>(&self, lobby: LobbyId, mut cb: F)
-        where F: FnMut(Result<LobbyId, ()>) + 'static + Send
+    pub fn join_lobby<F>(&self, lobby: LobbyId, cb: F)
+        where F: Fn(Result<LobbyId, ()>) + 'static + Send
     {
         unsafe {
             let api_call = sys::SteamAPI_ISteamMatchmaking_JoinLobby(self.mm, lobby.0);