- `(if (find-class 'sb-mop)
- '(sb-mop:class-slots
- sb-mop::standard-class
- sb-mop:slot-definition-name sb-mop:finalize-inheritance
- sb-mop::standard-direct-slot-definition
- sb-mop::standard-effective-slot-definition sb-mop:validate-superclass
- sb-mop:direct-slot-definition-class sb-mop:compute-effective-slot-definition
- sb-mop::compute-effective-slot-definition-initargs
- sb-mop:slot-value-using-class)
- '(sb-pcl::class-of sb-pcl::class-name sb-pcl::class-slots sb-pcl::find-class
- sb-pcl::standard-class
- sb-pcl:slot-definition-name sb-pcl::finalize-inheritance
- sb-pcl::standard-direct-slot-definition
- sb-pcl::standard-effective-slot-definition sb-pcl::validate-superclass
- sb-pcl::direct-slot-definition-class sb-pcl::compute-effective-slot-definition
- sb-pcl::compute-effective-slot-definition-initargs
- sb-pcl::slot-value-using-class)
- )
+ `(,@(if (find-package 'sb-mop)
+ '(sb-mop:class-slots
+ sb-mop::standard-class
+ sb-mop:slot-definition-name sb-mop:finalize-inheritance
+ sb-mop::standard-direct-slot-definition
+ sb-mop::standard-effective-slot-definition sb-mop:validate-superclass
+ sb-mop:direct-slot-definition-class sb-mop:compute-effective-slot-definition
+ sb-mop::compute-effective-slot-definition-initargs
+ sb-mop:slot-value-using-class)
+ '(sb-pcl::class-of sb-pcl::class-name sb-pcl::class-slots sb-pcl::find-class
+ sb-pcl::standard-class
+ sb-pcl:slot-definition-name sb-pcl::finalize-inheritance
+ sb-pcl::standard-direct-slot-definition
+ sb-pcl::standard-effective-slot-definition sb-pcl::validate-superclass
+ sb-pcl::direct-slot-definition-class sb-pcl::compute-effective-slot-definition
+ sb-pcl::compute-effective-slot-definition-initargs
+ sb-pcl::slot-value-using-class)))