events: Replace generic "alias" trait implementations by individual ones

… so that rustdoc lists types implementing them properly.

crates/ruma-common/src/events/_custom.rs

@@ -2,9 +2,11 @@ use serde::Serialize;
 use serde_json::value::RawValue as RawJsonValue;
 
 use super::{
-    EphemeralRoomEventType, EventContent, GlobalAccountDataEventType, HasDeserializeFields,
+    EphemeralRoomEventContent, EphemeralRoomEventType, EventContent, GlobalAccountDataEventContent,
-    MessageLikeEventType, RedactContent, RedactedEventContent, RoomAccountDataEventType,
+    GlobalAccountDataEventType, HasDeserializeFields, MessageLikeEventContent,
-    StateEventContent, StateEventType, ToDeviceEventType,
+    MessageLikeEventType, RedactContent, RedactedEventContent, RedactedMessageLikeEventContent,
+    RedactedStateEventContent, RoomAccountDataEventContent, RoomAccountDataEventType,
+    StateEventContent, StateEventType, ToDeviceEventContent, ToDeviceEventType,
 };
 use crate::RoomVersionId;
 
@@ -63,12 +65,23 @@ macro_rules! custom_room_event_content {
 }
 
 custom_event_content!(CustomGlobalAccountDataEventContent, GlobalAccountDataEventType);
-custom_event_content!(CustomRoomAccountDataEventContent, RoomAccountDataEventType);
+impl GlobalAccountDataEventContent for CustomGlobalAccountDataEventContent {}
-custom_event_content!(CustomEphemeralRoomEventContent, EphemeralRoomEventType);
-custom_room_event_content!(CustomMessageLikeEventContent, MessageLikeEventType);
-custom_room_event_content!(CustomStateEventContent, StateEventType);
-custom_event_content!(CustomToDeviceEventContent, ToDeviceEventType);
 
+custom_event_content!(CustomRoomAccountDataEventContent, RoomAccountDataEventType);
+impl RoomAccountDataEventContent for CustomRoomAccountDataEventContent {}
+
+custom_event_content!(CustomEphemeralRoomEventContent, EphemeralRoomEventType);
+impl EphemeralRoomEventContent for CustomEphemeralRoomEventContent {}
+
+custom_room_event_content!(CustomMessageLikeEventContent, MessageLikeEventType);
+impl MessageLikeEventContent for CustomMessageLikeEventContent {}
+impl RedactedMessageLikeEventContent for CustomMessageLikeEventContent {}
+
+custom_room_event_content!(CustomStateEventContent, StateEventType);
 impl StateEventContent for CustomStateEventContent {
     type StateKey = String;
 }
+impl RedactedStateEventContent for CustomStateEventContent {}
+
+custom_event_content!(CustomToDeviceEventContent, ToDeviceEventType);
+impl ToDeviceEventContent for CustomToDeviceEventContent {}

crates/ruma-common/src/events/content.rs

@@ -136,39 +136,32 @@ pub enum EventKind {
     Presence,
 }
 
-/// An alias for `EventContent<EventType = GlobalAccountDataEventType>`.
+/// Content of a global account-data event.
 pub trait GlobalAccountDataEventContent:
     EventContent<EventType = GlobalAccountDataEventType>
 {
 }
-impl<T: EventContent<EventType = GlobalAccountDataEventType>> GlobalAccountDataEventContent for T {}
 
-/// An alias for `EventContent<EventType = RoomAccountDataEventType>`.
+/// Content of a room-specific account-data event.
 pub trait RoomAccountDataEventContent: EventContent<EventType = RoomAccountDataEventType> {}
-impl<T: EventContent<EventType = RoomAccountDataEventType>> RoomAccountDataEventContent for T {}
 
-/// An alias for `EventContent<EventType = EphemeralRoomEventType>`.
+/// Content of an ephemeral room event.
 pub trait EphemeralRoomEventContent: EventContent<EventType = EphemeralRoomEventType> {}
-impl<T: EventContent<EventType = EphemeralRoomEventType>> EphemeralRoomEventContent for T {}
 
-/// An alias for `EventContent<EventType = MessageLikeEventType>`.
+/// Content of a non-redacted message-like event.
 pub trait MessageLikeEventContent: EventContent<EventType = MessageLikeEventType> {}
-impl<T: EventContent<EventType = MessageLikeEventType>> MessageLikeEventContent for T {}
 
-/// An alias for `MessageLikeEventContent + RedactedEventContent`.
+/// Content of a redacted message-like event.
 pub trait RedactedMessageLikeEventContent: MessageLikeEventContent + RedactedEventContent {}
-impl<T: MessageLikeEventContent + RedactedEventContent> RedactedMessageLikeEventContent for T {}
 
-/// An alias for `StateEventContent + RedactedEventContent`.
+/// Content of a redacted state event.
-pub trait RedactedStateEventContent: StateEventContent + RedactedEventContent {}
-impl<T: StateEventContent + RedactedEventContent> RedactedStateEventContent for T {}
-
-/// An alias for `EventContent<EventType = ToDeviceEventType>`.
-pub trait ToDeviceEventContent: EventContent<EventType = ToDeviceEventType> {}
-impl<T: EventContent<EventType = ToDeviceEventType>> ToDeviceEventContent for T {}
-
-/// An alias for `EventContent<EventType = StateEventType>`.
 pub trait StateEventContent: EventContent<EventType = StateEventType> {
     /// The type of the event's `state_key` field.
     type StateKey: AsRef<str> + Clone + fmt::Debug + DeserializeOwned + Serialize;
 }
+
+/// Content of a non-redacted state event.
+pub trait RedactedStateEventContent: StateEventContent + RedactedEventContent {}
+
+/// Content of a to-device event.
+pub trait ToDeviceEventContent: EventContent<EventType = ToDeviceEventType> {}

crates/ruma-common/src/events/kinds.rs

@@ -7,10 +7,9 @@ use serde_json::value::RawValue as RawJsonValue;
 use super::{
     room::redaction::SyncRoomRedactionEvent, EphemeralRoomEventContent, EventContent,
     GlobalAccountDataEventContent, MessageLikeEventContent, MessageLikeEventType,
-    MessageLikeUnsigned, Redact, RedactContent, RedactedEventContent,
+    MessageLikeUnsigned, Redact, RedactContent, RedactedMessageLikeEventContent,
-    RedactedMessageLikeEventContent, RedactedStateEventContent, RedactedUnsigned,
+    RedactedStateEventContent, RedactedUnsigned, RedactionDeHelper, RoomAccountDataEventContent,
-    RedactionDeHelper, RoomAccountDataEventContent, StateEventContent, StateEventType,
+    StateEventContent, StateEventType, StateUnsigned, ToDeviceEventContent,
-    StateUnsigned, ToDeviceEventContent,
 };
 use crate::{
     serde::from_raw_json_value, EventId, MilliSecondsSinceUnixEpoch, OwnedEventId, OwnedRoomId,
@@ -151,7 +150,7 @@ pub struct RedactedSyncMessageLikeEvent<C: RedactedMessageLikeEventContent> {
 #[serde(untagged)]
 pub enum MessageLikeEvent<C: MessageLikeEventContent + RedactContent>
 where
-    C::Redacted: MessageLikeEventContent + RedactedEventContent,
+    C::Redacted: RedactedMessageLikeEventContent,
 {
     /// Original, unredacted form of the event.
     Original(OriginalMessageLikeEvent<C>),
@@ -169,7 +168,7 @@ where
 #[serde(untagged)]
 pub enum SyncMessageLikeEvent<C: MessageLikeEventContent + RedactContent>
 where
-    C::Redacted: MessageLikeEventContent + RedactedEventContent,
+    C::Redacted: RedactedMessageLikeEventContent,
 {
     /// Original, unredacted form of the event.
     Original(OriginalSyncMessageLikeEvent<C>),
@@ -336,7 +335,7 @@ pub struct RedactedSyncStateEvent<C: RedactedStateEventContent> {
 #[serde(untagged)]
 pub enum StateEvent<C: StateEventContent + RedactContent>
 where
-    C::Redacted: StateEventContent + RedactedEventContent,
+    C::Redacted: RedactedStateEventContent,
 {
     /// Original, unredacted form of the event.
     Original(OriginalStateEvent<C>),
@@ -354,7 +353,7 @@ where
 #[serde(untagged)]
 pub enum SyncStateEvent<C: StateEventContent + RedactContent>
 where
-    C::Redacted: StateEventContent + RedactedEventContent,
+    C::Redacted: RedactedStateEventContent,
 {
     /// Original, unredacted form of the event.
     Original(OriginalSyncStateEvent<C>),
@@ -411,14 +410,14 @@ pub struct DecryptedMegolmV1Event<C: MessageLikeEventContent> {
 
 macro_rules! impl_possibly_redacted_event {
     (
-        $ty:ident ( $content_trait:ident, $event_type:ident )
+        $ty:ident ( $content_trait:ident, $redacted_content_trait:ident, $event_type:ident )
         $( where C::Redacted: $trait:ident<StateKey = C::StateKey>, )?
         { $($extra:tt)* }
     ) => {
         impl<C> $ty<C>
         where
             C: $content_trait + RedactContent,
-            C::Redacted: $content_trait + RedactedEventContent,
+            C::Redacted: $redacted_content_trait,
             $( C::Redacted: $trait<StateKey = C::StateKey>, )?
         {
             /// Returns the `type` of this event.
@@ -460,7 +459,7 @@ macro_rules! impl_possibly_redacted_event {
         impl<C> Redact for $ty<C>
         where
             C: $content_trait + RedactContent,
-            C::Redacted: $content_trait + RedactedEventContent,
+            C::Redacted: $redacted_content_trait,
             $( C::Redacted: $trait<StateKey = C::StateKey>, )?
         {
             type Redacted = Self;
@@ -476,7 +475,7 @@ macro_rules! impl_possibly_redacted_event {
         impl<'de, C> Deserialize<'de> for $ty<C>
         where
             C: $content_trait + RedactContent,
-            C::Redacted: $content_trait + RedactedEventContent,
+            C::Redacted: $redacted_content_trait,
             $( C::Redacted: $trait<StateKey = C::StateKey>, )?
         {
             fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
@@ -496,7 +495,10 @@ macro_rules! impl_possibly_redacted_event {
     }
 }
 
-impl_possibly_redacted_event!(MessageLikeEvent(MessageLikeEventContent, MessageLikeEventType) {
+impl_possibly_redacted_event!(
+    MessageLikeEvent(
+        MessageLikeEventContent, RedactedMessageLikeEventContent, MessageLikeEventType
+    ) {
         /// Returns this event's `room_id` field.
         pub fn room_id(&self) -> &RoomId {
             match self {
@@ -512,9 +514,13 @@ impl_possibly_redacted_event!(MessageLikeEvent(MessageLikeEventContent, MessageL
                 _ => None,
             }
         }
-});
+    }
+);
 
-impl_possibly_redacted_event!(SyncMessageLikeEvent(MessageLikeEventContent, MessageLikeEventType) {
+impl_possibly_redacted_event!(
+    SyncMessageLikeEvent(
+        MessageLikeEventContent, RedactedMessageLikeEventContent, MessageLikeEventType
+    ) {
         /// Get the inner `OriginalSyncMessageLikeEvent` if this is an unredacted event.
         pub fn as_original(&self) -> Option<&OriginalSyncMessageLikeEvent<C>> {
             match self {
@@ -530,10 +536,11 @@ impl_possibly_redacted_event!(SyncMessageLikeEvent(MessageLikeEventContent, Mess
                 Self::Redacted(ev) => MessageLikeEvent::Redacted(ev.into_full_event(room_id)),
             }
         }
-});
+    }
+);
 
 impl_possibly_redacted_event!(
-    StateEvent(StateEventContent, StateEventType)
+    StateEvent(StateEventContent, RedactedStateEventContent, StateEventType)
     where
         C::Redacted: StateEventContent<StateKey = C::StateKey>,
     {
@@ -564,7 +571,7 @@ impl_possibly_redacted_event!(
 );
 
 impl_possibly_redacted_event!(
-    SyncStateEvent(StateEventContent, StateEventType)
+    SyncStateEvent(StateEventContent, RedactedStateEventContent, StateEventType)
     where
         C::Redacted: StateEventContent<StateKey = C::StateKey>,
     {
@@ -595,11 +602,11 @@ impl_possibly_redacted_event!(
 );
 
 macro_rules! impl_sync_from_full {
-    ($ty:ident, $full:ident, $content_trait:ident) => {
+    ($ty:ident, $full:ident, $content_trait:ident, $redacted_content_trait: ident) => {
         impl<C> From<$full<C>> for $ty<C>
         where
             C: $content_trait + RedactContent,
-            C::Redacted: $content_trait + RedactedEventContent,
+            C::Redacted: $redacted_content_trait,
         {
             fn from(full: $full<C>) -> Self {
                 match full {
@@ -611,5 +618,10 @@ macro_rules! impl_sync_from_full {
     };
 }
 
-impl_sync_from_full!(SyncMessageLikeEvent, MessageLikeEvent, MessageLikeEventContent);
+impl_sync_from_full!(
-impl_sync_from_full!(SyncStateEvent, StateEvent, StateEventContent);
+    SyncMessageLikeEvent,
+    MessageLikeEvent,
+    MessageLikeEventContent,
+    RedactedMessageLikeEventContent
+);
+impl_sync_from_full!(SyncStateEvent, StateEvent, StateEventContent, RedactedStateEventContent);

crates/ruma-common/src/events/room/aliases.rs

@@ -6,8 +6,8 @@ use serde_json::value::RawValue as RawJsonValue;
 
 use crate::{
     events::{
-        EventContent, HasDeserializeFields, RedactContent, RedactedEventContent, StateEventContent,
+        EventContent, HasDeserializeFields, RedactContent, RedactedEventContent,
-        StateEventType,
+        RedactedStateEventContent, StateEventContent, StateEventType,
     },
     OwnedRoomAliasId, OwnedServerName, RoomVersionId,
 };
@@ -99,6 +99,8 @@ impl StateEventContent for RedactedRoomAliasesEventContent {
     type StateKey = OwnedServerName;
 }
 
+impl RedactedStateEventContent for RedactedRoomAliasesEventContent {}
+
 // Since this redacted event has fields we leave the default `empty` method
 // that will error if called.
 impl RedactedEventContent for RedactedRoomAliasesEventContent {

crates/ruma-common/src/events/room/member.rs

@@ -10,8 +10,8 @@ use serde_json::value::RawValue as RawJsonValue;
 
 use crate::{
     events::{
-        EventContent, HasDeserializeFields, RedactContent, RedactedEventContent, StateEventContent,
+        EventContent, HasDeserializeFields, RedactContent, RedactedEventContent,
-        StateEventType,
+        RedactedStateEventContent, StateEventContent, StateEventType,
     },
     serde::StringEnum,
     OwnedMxcUri, OwnedServerName, OwnedServerSigningKeyId, OwnedUserId, PrivOwnedStr,
@@ -204,6 +204,8 @@ impl StateEventContent for RedactedRoomMemberEventContent {
     type StateKey = OwnedUserId;
 }
 
+impl RedactedStateEventContent for RedactedRoomMemberEventContent {}
+
 // Since this redacted event has fields we leave the default `empty` method
 // that will error if called.
 impl RedactedEventContent for RedactedRoomMemberEventContent {

crates/ruma-macros/src/events/event.rs

@@ -1,7 +1,7 @@
 //! Implementation of the top level `*Event` derive macro.
 
 use proc_macro2::{Span, TokenStream};
-use quote::quote;
+use quote::{format_ident, quote};
 use syn::{parse_quote, Data, DataStruct, DeriveInput, Field, Fields, FieldsNamed, GenericParam};
 
 use super::{
@@ -359,7 +359,6 @@ fn expand_redact_event(
     ruma_common: &TokenStream,
 ) -> syn::Result<TokenStream> {
     let redacted_type = kind.to_event_ident(var.to_redacted())?;
-    let redacted_event_type_enum = kind.to_event_type_enum();
     let ident = &input.ident;
 
     let mut generics = input.generics.clone();
@@ -376,20 +375,14 @@ fn expand_redact_event(
     let where_clause = generics.make_where_clause();
     where_clause.predicates.push(parse_quote! { #ty_param: #ruma_common::events::RedactContent });
 
-    let redacted_event_content_bound = if kind == EventKind::State {
+    let assoc_type_bounds =
-        quote! {
+        (kind == EventKind::State).then(|| quote! { StateKey = #ty_param::StateKey });
-            #ruma_common::events::StateEventContent<StateKey = #ty_param::StateKey>
+    let trait_name = format_ident!("Redacted{kind}Content");
-        }
+    let redacted_event_content_bound = quote! {
-    } else {
+        #ruma_common::events::#trait_name<#assoc_type_bounds>
-        quote! {
-            #ruma_common::events::EventContent<
-                EventType = #ruma_common::events::#redacted_event_type_enum
-            >
-        }
     };
     where_clause.predicates.push(parse_quote! {
-        <#ty_param as #ruma_common::events::RedactContent>::Redacted:
+        <#ty_param as #ruma_common::events::RedactContent>::Redacted: #redacted_event_content_bound
-            #redacted_event_content_bound + #ruma_common::events::RedactedEventContent
     });
 
     let (impl_generics, ty_gen, where_clause) = generics.split_for_impl();

crates/ruma-macros/src/events/event_content.rs

@@ -407,8 +407,10 @@ fn generate_redacted_event_content<'a>(
     )
     .unwrap_or_else(syn::Error::into_compile_error);
 
-    let static_event_content_impl = event_kind.map(|k| {
+    let sub_trait_name = event_kind.map(|kind| format_ident!("Redacted{kind}Content"));
-        generate_static_event_content_impl(&redacted_ident, k, true, event_type, ruma_common)
+
+    let static_event_content_impl = event_kind.map(|kind| {
+        generate_static_event_content_impl(&redacted_ident, kind, true, event_type, ruma_common)
     });
 
     let mut event_types = aliases.to_owned();
@@ -460,6 +462,9 @@ fn generate_redacted_event_content<'a>(
             }
         }
 
+        #[automatically_derived]
+        impl #ruma_common::events::#sub_trait_name for #redacted_ident {}
+
         #static_event_content_impl
     })
 }
@@ -611,13 +616,21 @@ fn generate_event_content_impl<'a>(
         }
     }
 
+    let sub_trait_impl = event_kind.map(|kind| {
+        let trait_name = format_ident!("{kind}Content");
+
         let state_event_content_impl = (event_kind == Some(EventKind::State)).then(|| {
             assert!(state_key_type.is_some());
             quote! {
-            #[automatically_derived]
-            impl #ruma_common::events::StateEventContent for #ident {
                 type StateKey = #state_key_type;
             }
+        });
+
+        quote! {
+            #[automatically_derived]
+            impl #ruma_common::events::#trait_name for #ident {
+                #state_event_content_impl
+            }
         }
     });
 
@@ -682,7 +695,7 @@ fn generate_event_content_impl<'a>(
             }
         }
 
-        #state_event_content_impl
+        #sub_trait_impl
     })
 }