Fix clippy warning on next (#3078)

Fixes CI failure

Author: mkrasnitski

src/collector/mod.rs

@@ -178,7 +178,7 @@ make_specific_collector!(
     // - filter expression (this expressoin must return true to let the event through)
     author_id: UserId => interaction.user.id == *author_id,
     channel_id: ChannelId => interaction.channel_id == *channel_id,
-    guild_id: GuildId => interaction.guild_id.map_or(true, |x| x == *guild_id),
+    guild_id: GuildId => interaction.guild_id.is_none_or(|x| x == *guild_id),
     message_id: MessageId => interaction.message.id == *message_id,
     custom_ids: FixedArray<FixedString> => custom_ids.contains(&interaction.data.custom_id),
 );
@@ -190,17 +190,17 @@ make_specific_collector!(
     }) => interaction,
     author_id: UserId => interaction.user.id == *author_id,
     channel_id: ChannelId => interaction.channel_id == *channel_id,
-    guild_id: GuildId => interaction.guild_id.map_or(true, |g| g == *guild_id),
-    message_id: MessageId => interaction.message.as_ref().map_or(true, |m| m.id == *message_id),
+    guild_id: GuildId => interaction.guild_id.is_none_or(|g| g == *guild_id),
+    message_id: MessageId => interaction.message.as_ref().is_none_or(|m| m.id == *message_id),
     custom_ids: Vec<FixedString> => custom_ids.contains(&interaction.data.custom_id),
 );
 make_specific_collector!(
     ReactionCollector, Reaction,
     CollectReactions, collect_reactions,
     Event::ReactionAdd(ReactionAddEvent { reaction }) => reaction,
-    author_id: UserId => reaction.user_id.map_or(true, |a| a == *author_id),
+    author_id: UserId => reaction.user_id.is_none_or(|a| a == *author_id),
     channel_id: ChannelId => reaction.channel_id == *channel_id,
-    guild_id: GuildId => reaction.guild_id.map_or(true, |g| g == *guild_id),
+    guild_id: GuildId => reaction.guild_id.is_none_or(|g| g == *guild_id),
     message_id: MessageId => reaction.message_id == *message_id,
 );
 make_specific_collector!(
@@ -209,5 +209,5 @@ make_specific_collector!(
     Event::MessageCreate(MessageCreateEvent { message }) => message,
     author_id: UserId => message.author.id == *author_id,
     channel_id: ChannelId => message.channel_id == *channel_id,
-    guild_id: GuildId => message.guild_id.map_or(true, |g| g == *guild_id),
+    guild_id: GuildId => message.guild_id.is_none_or(|g| g == *guild_id),
 );

src/gateway/sharding/mod.rs

@@ -432,7 +432,7 @@ impl Shard {
         }
 
         let resume = num
-            .map_or(true, |x| x != close_codes::AUTHENTICATION_FAILED && self.session_id.is_some());
+            .is_none_or(|x| x != close_codes::AUTHENTICATION_FAILED && self.session_id.is_some());
 
         Ok(Some(if resume {
             ShardAction::Reconnect(ReconnectType::Resume)

src/gateway/sharding/shard_runner.rs

@@ -178,11 +178,11 @@ impl ShardRunner {
                 let can_dispatch = self
                     .event_handler
                     .as_ref()
-                    .map_or(true, |handler| handler.filter_event(&context, &event))
+                    .is_none_or(|handler| handler.filter_event(&context, &event))
                     && self
                         .raw_event_handler
                         .as_ref()
-                        .map_or(true, |handler| handler.filter_event(&context, &event));
+                        .is_none_or(|handler| handler.filter_event(&context, &event));
 
                 if can_dispatch {
                     #[cfg(feature = "collector")]

src/model/guild/mod.rs

@@ -597,7 +597,7 @@ impl Guild {
 
         for member in &self.members {
             if &*member.user.name == username
-                && discrim.map_or(true, |d| member.user.discriminator == d)
+                && discrim.is_none_or(|d| member.user.discriminator == d)
             {
                 return Some(member);
             }