chore(ffi): Justify the allow(clippy::large_enum_variant).

bindings/matrix-sdk-ffi/src/event.rs

@@ -60,6 +60,14 @@ impl From<AnyTimelineEvent> for TimelineEvent {
 }
 
 #[derive(uniffi::Enum)]
+// A note about this `allow(clippy::large_enum_variant)`.
+// In order to reduce the size of `TimelineEventType`, we would need to
+// put some parts in a `Box`, or an `Arc`. Sadly, it doesn't play well with
+// UniFFI. We would need to change the `uniffi::Record` of the subtypes into
+// `uniffi::Object`, which is a radical change. It would simplify the memory
+// usage, but it would slow down the performance around the FFI border. Thus,
+// let's consider this is a false-positive lint in this particular case.
+#[allow(clippy::large_enum_variant)]
 pub enum TimelineEventType {
     MessageLike { content: MessageLikeEventContent },
     State { content: StateEventContent },
@@ -134,6 +142,14 @@ impl TryFrom<AnySyncStateEvent> for StateEventContent {
 }
 
 #[derive(uniffi::Enum)]
+// A note about this `allow(clippy::large_enum_variant)`.
+// In order to reduce the size of `MessageLineEventContent`, we would need to
+// put some parts in a `Box`, or an `Arc`. Sadly, it doesn't play well with
+// UniFFI. We would need to change the `uniffi::Record` of the subtypes into
+// `uniffi::Object`, which is a radical change. It would simplify the memory
+// usage, but it would slow down the performance around the FFI border. Thus,
+// let's consider this is a false-positive lint in this particular case.
+#[allow(clippy::large_enum_variant)]
 pub enum MessageLikeEventContent {
     CallAnswer,
     CallInvite,

bindings/matrix-sdk-ffi/src/timeline/content.rs

@@ -96,6 +96,14 @@ impl From<matrix_sdk_ui::timeline::TimelineItemContent> for TimelineItemContent
 }
 
 #[derive(Clone, uniffi::Enum)]
+// A note about this `allow(clippy::large_enum_variant)`.
+// In order to reduce the size of `TimelineItemContent`, we would need to
+// put some parts in a `Box`, or an `Arc`. Sadly, it doesn't play well with
+// UniFFI. We would need to change the `uniffi::Record` of the subtypes into
+// `uniffi::Object`, which is a radical change. It would simplify the memory
+// usage, but it would slow down the performance around the FFI border. Thus,
+// let's consider this is a false-positive lint in this particular case.
+#[allow(clippy::large_enum_variant)]
 pub enum TimelineItemContent {
     MsgLike {
         content: MsgLikeContent,

bindings/matrix-sdk-ffi/src/timeline/msg_like.rs

@@ -252,6 +252,7 @@ impl ThreadSummary {
 }
 
 #[derive(Clone, uniffi::Enum)]
+#[allow(clippy::large_enum_variant)]
 pub enum ThreadSummaryLatestEventDetails {
     Unavailable,
     Pending,

bindings/matrix-sdk-ffi/src/timeline/reply.rs

@@ -60,6 +60,7 @@ impl From<matrix_sdk_ui::timeline::InReplyToDetails> for InReplyToDetails {
 }
 
 #[derive(Clone, uniffi::Enum)]
+#[allow(clippy::large_enum_variant)]
 pub enum RepliedToEventDetails {
     Unavailable,
     Pending,