Add #[automatically_derived] annotation (#28)

Author: termoshtt

pyo3-stub-gen-derive/src/gen_stub.rs

@@ -91,6 +91,7 @@ pub fn pyclass(item: TokenStream2) -> Result<TokenStream2> {
     let inner = PyClassInfo::try_from(parse2::<ItemStruct>(item.clone())?)?;
     Ok(quote! {
         #item
+        #[automatically_derived]
         pyo3_stub_gen::inventory::submit! {
             #inner
         }
@@ -101,6 +102,7 @@ pub fn pyclass_enum(item: TokenStream2) -> Result<TokenStream2> {
     let inner = PyEnumInfo::try_from(parse2::<ItemEnum>(item.clone())?)?;
     Ok(quote! {
         #item
+        #[automatically_derived]
         pyo3_stub_gen::inventory::submit! {
             #inner
         }
@@ -111,6 +113,7 @@ pub fn pymethods(item: TokenStream2) -> Result<TokenStream2> {
     let inner = PyMethodsInfo::try_from(parse2::<ItemImpl>(item.clone())?)?;
     Ok(quote! {
         #item
+        #[automatically_derived]
         pyo3_stub_gen::inventory::submit! {
             #inner
         }
@@ -122,6 +125,7 @@ pub fn pyfunction(attr: TokenStream2, item: TokenStream2) -> Result<TokenStream2
     inner.parse_attr(attr)?;
     Ok(quote! {
         #item
+        #[automatically_derived]
         pyo3_stub_gen::inventory::submit! {
             #inner
         }