diff options
Diffstat (limited to 'rust/qemu-api-macros')
| -rw-r--r-- | rust/qemu-api-macros/src/lib.rs | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/rust/qemu-api-macros/src/lib.rs b/rust/qemu-api-macros/src/lib.rs index b525d89c09..a614741889 100644 --- a/rust/qemu-api-macros/src/lib.rs +++ b/rust/qemu-api-macros/src/lib.rs @@ -85,7 +85,15 @@ fn derive_object_or_error(input: DeriveInput) -> Result<proc_macro2::TokenStream is_c_repr(&input, "#[derive(Object)]")?; let name = &input.ident; - let parent = &get_fields(&input, "#[derive(Object)]")?[0].ident; + let parent = &get_fields(&input, "#[derive(Object)]")? + .get(0) + .ok_or_else(|| { + Error::new( + input.ident.span(), + "#[derive(Object)] requires a parent field", + ) + })? + .ident; Ok(quote! { ::qemu_api::assert_field_type!(#name, #parent, |