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Wed, 27 Aug 2025 11:26:20 -0700 (PDT) X-Google-Smtp-Source: AGHT+IESvaM4e1LlUuB20tw4KebihFZWqAWun27TYBPdTU6Xnpdd3HvS7ok1h6kjKDUOWV16/stJvQ== X-Received: by 2002:a05:6000:2004:b0:3c7:caf5:f9af with SMTP id ffacd0b85a97d-3c7cb0542b2mr13809401f8f.57.1756319179740; Wed, 27 Aug 2025 11:26:19 -0700 (PDT) From: Paolo Bonzini To: qemu-devel@nongnu.org Cc: =?UTF-8?q?Marc-Andr=C3=A9=20Lureau?= Subject: [PULL 12/14] rust/qemu-api-macros: make derive(Object) friendly when missing parent Date: Wed, 27 Aug 2025 20:25:30 +0200 Message-ID: <20250827182533.854476-13-pbonzini@redhat.com> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20250827182533.854476-1-pbonzini@redhat.com> References: <20250827182533.854476-1-pbonzini@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable 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=170.10.133.124; envelope-from=pbonzini@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_CERTIFIED_BLOCKED=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001 autolearn=ham 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: 1756319446844116600 From: Marc-Andr=C3=A9 Lureau Signed-off-by: Marc-Andr=C3=A9 Lureau Link: https://lore.kernel.org/r/20250826133132.4064478-5-marcandre.lureau@r= edhat.com Signed-off-by: Paolo Bonzini --- 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 b525d89c09e..a6147418891 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 2.51.0