Merge pull request #2330 from dtolnay/remote

Fix generated Into conversion involving generic remote derive with getter

Author: dtolnay

serde_derive/src/de.rs

@@ -712,8 +712,9 @@ fn deserialize_seq(
 
     if params.has_getter {
         let this_type = &params.this_type;
+        let (_, ty_generics, _) = params.generics.split_for_impl();
         result = quote! {
-            _serde::__private::Into::<#this_type>::into(#result)
+            _serde::__private::Into::<#this_type #ty_generics>::into(#result)
         };
     }
 
@@ -856,8 +857,9 @@ fn deserialize_newtype_struct(
     let mut result = quote!(#type_path(__field0));
     if params.has_getter {
         let this_type = &params.this_type;
+        let (_, ty_generics, _) = params.generics.split_for_impl();
         result = quote! {
-            _serde::__private::Into::<#this_type>::into(#result)
+            _serde::__private::Into::<#this_type #ty_generics>::into(#result)
         };
     }
 
@@ -2629,8 +2631,9 @@ fn deserialize_map(
     let mut result = quote!(#struct_path { #(#result),* });
     if params.has_getter {
         let this_type = &params.this_type;
+        let (_, ty_generics, _) = params.generics.split_for_impl();
         result = quote! {
-            _serde::__private::Into::<#this_type>::into(#result)
+            _serde::__private::Into::<#this_type #ty_generics>::into(#result)
         };
     }
 

test_suite/tests/test_remote.rs

@@ -79,6 +79,13 @@ mod remote {
         pub value: T,
     }
 
+    impl<T> StructGeneric<T> {
+        #[allow(dead_code)]
+        pub fn get_value(&self) -> &T {
+            &self.value
+        }
+    }
+
     pub enum EnumGeneric<T> {
         Variant(T),
     }
@@ -171,6 +178,13 @@ struct StructPubDef {
     b: remote::Unit,
 }
 
+#[derive(Serialize, Deserialize)]
+#[serde(remote = "remote::StructGeneric")]
+struct StructGenericWithGetterDef<T> {
+    #[serde(getter = "remote::StructGeneric::get_value")]
+    value: T,
+}
+
 #[derive(Serialize, Deserialize)]
 #[serde(remote = "remote::StructGeneric<u8>")]
 struct StructConcrete {
@@ -206,3 +220,9 @@ impl From<StructPrivDef> for remote::StructPriv {
         remote::StructPriv::new(def.a, def.b)
     }
 }
+
+impl<T> From<StructGenericWithGetterDef<T>> for remote::StructGeneric<T> {
+    fn from(def: StructGenericWithGetterDef<T>) -> Self {
+        remote::StructGeneric { value: def.value }
+    }
+}