move struct into deserialize impl

card_game/src/lib.rs

@@ -653,20 +653,6 @@ where
 	}
 }
 
-#[cfg_attr(
-	feature = "serde",
-	derive(serde_derive::Deserialize),
-	serde(bound(deserialize = "
-		G: serde::Deserialize<'de>,
-		SessionConfig<G::Config>: serde::Deserialize<'de>,
-		Vec<G::Instruction>: serde::Deserialize<'de>,
-	"))
-)]
-struct SerializedSession<G: Game> {
-	config: SessionConfig<G::Config>,
-	state: G,
-	history: Vec<G::Instruction>,
-}
 #[cfg(feature = "serde")]
 impl<'de, G: Game<Score = i32>> serde::de::Deserialize<'de> for Session<G>
 where
@@ -680,6 +666,17 @@ where
 	where
 		D: serde::Deserializer<'de>,
 	{
+		#[derive(serde_derive::Deserialize)]
+		#[serde(bound(deserialize = "
+			G: serde::Deserialize<'de>,
+			SessionConfig<G::Config>: serde::Deserialize<'de>,
+			Vec<G::Instruction>: serde::Deserialize<'de>,
+		"))]
+		struct SerializedSession<G: Game> {
+			config: SessionConfig<G::Config>,
+			state: G,
+			history: Vec<G::Instruction>,
+		}
 		let serialized = SerializedSession::deserialize(deserializer)?;
 		let mut session = Session::new(serialized.state, serialized.config);
 		for instruction in serialized.history {