738         constraint: &Constraint,  in check_constraints()
743         match scope.iter_fields(decl).find(|field| field.id() == Some(&constraint.id)) {  in check_constraints()
747                     .with_message(format!("undeclared constraint identifier `{}`", constraint.id))  in check_constraints()
748                     .with_labels(vec![constraint.loc.primary()])  in check_constraints()
754                     .with_message(format!("invalid constraint identifier `{}`", constraint.id))  in check_constraints()
756                         constraint.loc.primary(),  in check_constraints()
759                             constraint.id  in check_constraints()
765                 match constraint.value {  in check_constraints()
771                                 constraint.tag_id.as_ref().unwrap()  in check_constraints()
774                                 constraint.loc.primary(),  in check_constraints()
777                                     constraint.id  in check_constraints()
789                             .with_labels(vec![constraint.loc.primary(), field.loc.secondary()]),  in check_constraints()
798                         match &constraint.tag_id {  in check_constraints()
804                                         constraint.value.unwrap()  in check_constraints()
807                                         constraint.loc.primary(),  in check_constraints()
810                                             constraint.id  in check_constraints()
821                                             constraint.loc.primary(),  in check_constraints()
824                                                 constraint.id  in check_constraints()
836                                             constraint.loc.primary(),  in check_constraints()
839                                                 constraint.id  in check_constraints()
855                                 constraint.value.unwrap()  in check_constraints()
858                                 constraint.loc.primary(),  in check_constraints()
861                                     constraint.id,  in check_constraints()
880         for constraint in constraints {  in check_constraints()
881             check_constraint(constraint, parent_decl, scope, diagnostics);  in check_constraints()
882             if let Some(prev) = constraints_by_id.insert(constraint.id.to_string(), constraint) {  in check_constraints()
889                             constraint.id  in check_constraints()
892                             constraint.loc.primary(),  in check_constraints()
916                         decl.constraints().fold(acc, |mut acc, constraint| {  in check_constraints()
917                             let _ = acc.insert(constraint.id.to_string(), constraint);  in check_constraints()
1411                             .map(|constraint| (constraint.id.clone(), constraint.clone())),  in inline_groups()
1431                                 .and_then(|constraint| constraint.tag_id.clone())  in inline_groups()