Merge pull request #1412 from dtolnay/automaticallyderived

Mark all generated impl blocks with #[automatically_derived]
dtolnay · Dec 11, 2024 · 6f538a7 · 6f538a7
2 parents 25f8c84 + 1d4fe98
commit 6f538a7
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Showing 2 changed files with 28 additions and 0 deletions.
diff --git a/macro/src/derive.rs b/macro/src/derive.rs
@@ -102,6 +102,7 @@ fn struct_copy(strct: &Struct, span: Span) -> TokenStream {
     let generics = &strct.generics;
 
     quote_spanned! {span=>
+        #[automatically_derived]
         impl #generics ::cxx::core::marker::Copy for #ident #generics {}
     }
 }
@@ -126,6 +127,7 @@ fn struct_clone(strct: &Struct, span: Span) -> TokenStream {
     };
 
     quote_spanned! {span=>
+        #[automatically_derived]
         #[allow(clippy::expl_impl_clone_on_copy)]
         impl #generics ::cxx::core::clone::Clone for #ident #generics {
             fn clone(&self) -> Self {
@@ -143,6 +145,7 @@ fn struct_debug(strct: &Struct, span: Span) -> TokenStream {
     let field_names = fields.clone().map(Ident::to_string);
 
     quote_spanned! {span=>
+        #[automatically_derived]
         impl #generics ::cxx::core::fmt::Debug for #ident #generics {
             fn fmt(&self, formatter: &mut ::cxx::core::fmt::Formatter<'_>) -> ::cxx::core::fmt::Result {
                 formatter.debug_struct(#struct_name)
@@ -159,6 +162,7 @@ fn struct_default(strct: &Struct, span: Span) -> TokenStream {
     let fields = strct.fields.iter().map(|field| &field.name.rust);
 
     quote_spanned! {span=>
+        #[automatically_derived]
         #[allow(clippy::derivable_impls)] // different spans than the derived impl
         impl #generics ::cxx::core::default::Default for #ident #generics {
             fn default() -> Self {
@@ -178,6 +182,7 @@ fn struct_ord(strct: &Struct, span: Span) -> TokenStream {
     let fields = strct.fields.iter().map(|field| &field.name.rust);
 
     quote_spanned! {span=>
+        #[automatically_derived]
         impl #generics ::cxx::core::cmp::Ord for #ident #generics {
             fn cmp(&self, other: &Self) -> ::cxx::core::cmp::Ordering {
                 #(
@@ -214,6 +219,7 @@ fn struct_partial_ord(strct: &Struct, span: Span) -> TokenStream {
     };
 
     quote_spanned! {span=>
+        #[automatically_derived]
         impl #generics ::cxx::core::cmp::PartialOrd for #ident #generics {
             #[allow(clippy::non_canonical_partial_ord_impl)]
             #[allow(renamed_and_removed_lints, clippy::incorrect_partial_ord_impl_on_ord_type)] // Rust 1.73 and older
@@ -228,6 +234,7 @@ fn enum_copy(enm: &Enum, span: Span) -> TokenStream {
     let ident = &enm.name.rust;
 
     quote_spanned! {span=>
+        #[automatically_derived]
         impl ::cxx::core::marker::Copy for #ident {}
     }
 }
@@ -236,6 +243,7 @@ fn enum_clone(enm: &Enum, span: Span) -> TokenStream {
     let ident = &enm.name.rust;
 
     quote_spanned! {span=>
+        #[automatically_derived]
         #[allow(clippy::expl_impl_clone_on_copy)]
         impl ::cxx::core::clone::Clone for #ident {
             fn clone(&self) -> Self {
@@ -257,6 +265,7 @@ fn enum_debug(enm: &Enum, span: Span) -> TokenStream {
     let fallback = format!("{}({{}})", ident);
 
     quote_spanned! {span=>
+        #[automatically_derived]
         impl ::cxx::core::fmt::Debug for #ident {
             fn fmt(&self, formatter: &mut ::cxx::core::fmt::Formatter<'_>) -> ::cxx::core::fmt::Result {
                 match *self {
@@ -272,6 +281,7 @@ fn enum_ord(enm: &Enum, span: Span) -> TokenStream {
     let ident = &enm.name.rust;
 
     quote_spanned! {span=>
+        #[automatically_derived]
         impl ::cxx::core::cmp::Ord for #ident {
             fn cmp(&self, other: &Self) -> ::cxx::core::cmp::Ordering {
                 ::cxx::core::cmp::Ord::cmp(&self.repr, &other.repr)
@@ -284,6 +294,7 @@ fn enum_partial_ord(enm: &Enum, span: Span) -> TokenStream {
     let ident = &enm.name.rust;
 
     quote_spanned! {span=>
+        #[automatically_derived]
         impl ::cxx::core::cmp::PartialOrd for #ident {
             #[allow(clippy::non_canonical_partial_ord_impl)]
             #[allow(renamed_and_removed_lints, clippy::incorrect_partial_ord_impl_on_ord_type)] // Rust 1.73 and older

diff --git a/macro/src/expand.rs b/macro/src/expand.rs
@@ -187,6 +187,7 @@ fn expand_struct(strct: &Struct) -> TokenStream {
         #[repr(C)]
         #struct_def
 
+        #[automatically_derived]
         unsafe impl #generics ::cxx::ExternType for #ident #generics {
             #[allow(unused_attributes)] // incorrect lint
             #[doc(hidden)]
@@ -312,6 +313,7 @@ fn expand_struct_forbid_drop(strct: &Struct) -> TokenStream {
     let impl_token = Token![impl](strct.visibility.span);
 
     quote_spanned! {span=>
+        #[automatically_derived]
         #impl_token #generics self::Drop for super::#ident #generics {}
     }
 }
@@ -358,11 +360,13 @@ fn expand_enum(enm: &Enum) -> TokenStream {
         #[repr(transparent)]
         #enum_def
 
+        #[automatically_derived]
         #[allow(non_upper_case_globals)]
         impl #ident {
             #(#variants)*
         }
 
+        #[automatically_derived]
         unsafe impl ::cxx::ExternType for #ident {
             #[allow(unused_attributes)] // incorrect lint
             #[doc(hidden)]
@@ -405,6 +409,7 @@ fn expand_cxx_type(ety: &ExternType) -> TokenStream {
         #[repr(C)]
         #extern_type_def
 
+        #[automatically_derived]
         unsafe impl #generics ::cxx::ExternType for #ident #generics {
             #[allow(unused_attributes)] // incorrect lint
             #[doc(hidden)]
@@ -428,6 +433,7 @@ fn expand_cxx_type_assert_pinned(ety: &ExternType, types: &Types) -> TokenStream
                 fn infer() {}
             }
 
+            #[automatically_derived]
             impl<T> __AmbiguousIfImpl<()> for T
             where
                 T: ?::cxx::core::marker::Sized
@@ -436,6 +442,7 @@ fn expand_cxx_type_assert_pinned(ety: &ExternType, types: &Types) -> TokenStream
             #[allow(dead_code)]
             struct __Invalid;
 
+            #[automatically_derived]
             impl<T> __AmbiguousIfImpl<__Invalid> for T
             where
                 T: ?::cxx::core::marker::Sized + ::cxx::core::marker::Unpin,
@@ -766,6 +773,7 @@ fn expand_cxx_function_shim(efn: &ExternFn, types: &Types) -> TokenStream {
                 &elided_generics
             };
             quote_spanned! {ident.span()=>
+                #[automatically_derived]
                 impl #generics #receiver_ident #receiver_generics {
                     #doc
                     #attrs
@@ -831,6 +839,7 @@ fn expand_rust_type_impl(ety: &ExternType) -> TokenStream {
     let unsafe_impl = quote_spanned!(ety.type_token.span=> unsafe impl);
 
     let mut impls = quote_spanned! {span=>
+        #[automatically_derived]
         #[doc(hidden)]
         #unsafe_impl #generics ::cxx::private::RustType for #ident #generics {}
     };
@@ -840,6 +849,7 @@ fn expand_rust_type_impl(ety: &ExternType) -> TokenStream {
             let type_id = type_id(&ety.name);
             let span = derive.span;
             impls.extend(quote_spanned! {span=>
+                #[automatically_derived]
                 unsafe impl #generics ::cxx::ExternType for #ident #generics {
                     #[allow(unused_attributes)] // incorrect lint
                     #[doc(hidden)]
@@ -920,6 +930,7 @@ fn expand_forbid(impls: TokenStream) -> TokenStream {
     quote! {
         mod forbid {
             pub trait Drop {}
+            #[automatically_derived]
             #[allow(drop_bounds)]
             impl<T: ?::cxx::core::marker::Sized + ::cxx::core::ops::Drop> self::Drop for T {}
             #impls
@@ -1301,6 +1312,7 @@ fn expand_rust_box(key: NamedImplKey, types: &Types, explicit_impl: Option<&Impl
     let prevent_unwind_drop_label = format!("::{} as Drop>::drop", ident);
 
     quote_spanned! {end_span=>
+        #[automatically_derived]
         #[doc(hidden)]
         #unsafe_token impl #impl_generics ::cxx::private::ImplBox for #ident #ty_generics {}
         #[doc(hidden)]
@@ -1359,6 +1371,7 @@ fn expand_rust_vec(key: NamedImplKey, types: &Types, explicit_impl: Option<&Impl
     let prevent_unwind_drop_label = format!("::{} as Drop>::drop", elem);
 
     quote_spanned! {end_span=>
+        #[automatically_derived]
         #[doc(hidden)]
         #unsafe_token impl #impl_generics ::cxx::private::ImplVec for #elem #ty_generics {}
         #[doc(hidden)]
@@ -1466,6 +1479,7 @@ fn expand_unique_ptr(
     let unsafe_token = format_ident!("unsafe", span = begin_span);
 
     quote_spanned! {end_span=>
+        #[automatically_derived]
         #unsafe_token impl #impl_generics ::cxx::private::UniquePtrTarget for #ident #ty_generics {
             fn __typename(f: &mut ::cxx::core::fmt::Formatter<'_>) -> ::cxx::core::fmt::Result {
                 f.write_str(#name)
@@ -1559,6 +1573,7 @@ fn expand_shared_ptr(
     let unsafe_token = format_ident!("unsafe", span = begin_span);
 
     quote_spanned! {end_span=>
+        #[automatically_derived]
         #unsafe_token impl #impl_generics ::cxx::private::SharedPtrTarget for #ident #ty_generics {
             fn __typename(f: &mut ::cxx::core::fmt::Formatter<'_>) -> ::cxx::core::fmt::Result {
                 f.write_str(#name)
@@ -1620,6 +1635,7 @@ fn expand_weak_ptr(key: NamedImplKey, types: &Types, explicit_impl: Option<&Impl
     let unsafe_token = format_ident!("unsafe", span = begin_span);
 
     quote_spanned! {end_span=>
+        #[automatically_derived]
         #unsafe_token impl #impl_generics ::cxx::private::WeakPtrTarget for #ident #ty_generics {
             fn __typename(f: &mut ::cxx::core::fmt::Formatter<'_>) -> ::cxx::core::fmt::Result {
                 f.write_str(#name)
@@ -1748,6 +1764,7 @@ fn expand_cxx_vector(
     };
 
     quote_spanned! {end_span=>
+        #[automatically_derived]
         #unsafe_token impl #impl_generics ::cxx::private::VectorElement for #elem #ty_generics {
             fn __typename(f: &mut ::cxx::core::fmt::Formatter<'_>) -> ::cxx::core::fmt::Result {
                 f.write_str(#name)