HEAP_CLASS_OF    1482 vm_insnhelper.c 	if (HEAP_CLASS_OF(recv) == rb_cFloat &&
HEAP_CLASS_OF    1483 vm_insnhelper.c 		 HEAP_CLASS_OF(obj) == rb_cFloat &&
HEAP_CLASS_OF    1498 vm_insnhelper.c 	else if (HEAP_CLASS_OF(recv) == rb_cString &&
HEAP_CLASS_OF    1499 vm_insnhelper.c 		 HEAP_CLASS_OF(obj) == rb_cString &&