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c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1756215124; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=RR4g8tZJYaGJJKv2wytLuzgUMVl5cxS9qnE1E7u/Aok=; b=A7PZJDI/AEacaalwKGT0Cg2VNd4pHy4eiNZCotFgXUvJyfuPmpqK31qhs5LowRAxVZK8RD WkMCt1NFbse87/vTxWnQmSz7cZUiEeNfpkFEIHTTAHPT0N9txfUrqfL90/+K8Wm+rVgeP/ /H6AL59wzo89sjxBFtuEzy3vOb7Pomk= X-MC-Unique: XlJcgt1KMw-iKnXx8pL7Xg-1 X-Mimecast-MFC-AGG-ID: XlJcgt1KMw-iKnXx8pL7Xg_1756215119 From: marcandre.lureau@redhat.com To: qemu-devel@nongnu.org Cc: Manos Pitsidianakis , =?UTF-8?q?Daniel=20P=2E=20Berrang=C3=A9?= , =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= , pbonzini@redhat.com, qemu-rust@nongnu.org, =?UTF-8?q?Marc-Andr=C3=A9=20Lureau?= Subject: [PATCH 4/4] rust/qemu-api-macros: make derive(Object) friendly when missing parent Date: Tue, 26 Aug 2025 17:31:32 +0400 Message-ID: <20250826133132.4064478-5-marcandre.lureau@redhat.com> In-Reply-To: <20250826133132.4064478-1-marcandre.lureau@redhat.com> References: <20250826133132.4064478-1-marcandre.lureau@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 3.4.1 on 10.30.177.93 Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=170.10.129.124; envelope-from=marcandre.lureau@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H5=0.001, RCVD_IN_MSPIKE_WL=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, RCVD_IN_VALIDITY_SAFE_BLOCKED=0.001, SPF_PASS=-0.001, T_SPF_HELO_TEMPERROR=0.01 autolearn=unavailable autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @redhat.com) X-ZM-MESSAGEID: 1756215221258124101 From: Marc-Andr=C3=A9 Lureau Signed-off-by: Marc-Andr=C3=A9 Lureau Reviewed-by: Zhao Liu --- rust/qemu-api-macros/src/lib.rs | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) 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)]")?; =20 let name =3D &input.ident; - let parent =3D &get_fields(&input, "#[derive(Object)]")?[0].ident; + let parent =3D &get_fields(&input, "#[derive(Object)]")? + .get(0) + .ok_or_else(|| { + Error::new( + input.ident.span(), + "#[derive(Object)] requires a parent field", + ) + })? + .ident; =20 Ok(quote! { ::qemu_api::assert_field_type!(#name, #parent, --=20 2.50.1