Put big model type fields behind Box (serenity-rs#2205)

This helps reduce the stack size of most types.

examples/testing/src/main.rs

@@ -4,6 +4,8 @@ use serenity::model::prelude::interaction::application_command::*;
 use serenity::model::prelude::*;
 use serenity::prelude::*;
 
+mod model_type_sizes;
+
 const IMAGE_URL: &str = "https://raw.githubusercontent.com/serenity-rs/serenity/current/logo.png";
 const IMAGE_URL_2: &str = "https://rustacean.net/assets/rustlogo.png";
 
@@ -71,6 +73,8 @@ async fn message(ctx: &Context, msg: Message) -> Result<(), serenity::Error> {
                 .add_existing_attachment(msg.attachments[0].id),
         )
         .await?;
+    } else if msg.content == "ranking" {
+        model_type_sizes::print_ranking();
     } else if msg.content == "auditlog" {
         // Test special characters in audit log reason
         msg.channel_id

src/model/application/interaction/application_command.rs

@@ -59,7 +59,7 @@ pub struct ApplicationCommandInteraction {
     ///
     /// **Note**: It is only present if the interaction is triggered in a guild.
     #[serde(skip_serializing_if = "Option::is_none")]
-    pub member: Option<Member>,
+    pub member: Option<Box<Member>>,
     /// The `user` object for the invoking user.
     pub user: User,
     /// A continuation token for responding to the interaction.
@@ -247,7 +247,7 @@ impl<'de> Deserialize<'de> for ApplicationCommandInteraction {
             add_guild_id_to_resolved(&mut map, guild_id);
         }
 
-        let member = remove_from_map_opt::<Member, _>(&mut map, "member")?;
+        let member = remove_from_map_opt::<Box<Member>, _>(&mut map, "member")?;
         let user = remove_from_map_opt(&mut map, "user")?
             .or_else(|| member.as_ref().map(|m| m.user.clone()))
             .ok_or_else(|| DeError::custom("expected user or member"))?;

src/model/application/interaction/message_component.rs

@@ -54,7 +54,7 @@ pub struct MessageComponentInteraction {
     pub version: u8,
     /// The message this interaction was triggered by, if
     /// it is a component.
-    pub message: Message,
+    pub message: Box<Message>,
     /// Permissions the app or bot has within the channel the interaction was sent from.
     pub app_permissions: Option<Permissions>,
     /// The selected language of the invoking user.

src/model/application/interaction/modal.rs

@@ -56,7 +56,7 @@ pub struct ModalSubmitInteraction {
     /// **Note**: Does not exist if the modal interaction originates from
     /// an application command interaction
     #[serde(skip_serializing_if = "Option::is_none")]
-    pub message: Option<Message>,
+    pub message: Option<Box<Message>>,
     /// Permissions the app or bot has within the channel the interaction was sent from.
     pub app_permissions: Option<Permissions>,
     /// The selected language of the invoking user.

src/model/channel/message.rs

@@ -110,7 +110,7 @@ pub struct Message {
     /// Sent if the message is a response to an [`Interaction`].
     ///
     /// [`Interaction`]: crate::model::application::interaction::Interaction
-    pub interaction: Option<MessageInteraction>,
+    pub interaction: Option<Box<MessageInteraction>>,
     /// The thread that was started from this message, includes thread member object.
     pub thread: Option<GuildChannel>,
     /// The components of this message
@@ -130,7 +130,7 @@ pub struct Message {
     pub guild_id: Option<GuildId>,
     /// A partial amount of data about the user's member data, if this message
     /// was sent in a guild.
-    pub member: Option<PartialMember>,
+    pub member: Option<Box<PartialMember>>,
 }
 
 #[cfg(feature = "model")]
@@ -546,7 +546,7 @@ impl Message {
             message_id: self.id,
             user_id,
             guild_id: self.guild_id,
-            member: self.member.clone(),
+            member: self.member.as_deref().cloned(),
         })
     }
 

src/utils/custom_message.rs

@@ -125,7 +125,7 @@ impl CustomMessage {
     /// [author]: Self::author
     #[inline]
     pub fn member(&mut self, member: PartialMember) -> &mut Self {
-        self.msg.member = Some(member);
+        self.msg.member = Some(Box::new(member));
 
         self
     }