rb_class_superclass  513 ext/digest/digest.c     for (p = klass; !NIL_P(p); p = rb_class_superclass(p)) {
rb_class_superclass  639 ext/openssl/ossl_asn1.c     	tmp_class = rb_class_superclass(tmp_class);
rb_class_superclass  606 include/ruby/intern.h VALUE rb_class_superclass(VALUE);
rb_class_superclass 3547 object.c           rb_define_method(rb_cClass, "superclass", rb_class_superclass, 0);