Allow Ref and Ptr casts up subtype hierarchies
Allow Ref and Ptr casts up subtype hierarchies

nhardt/logcabin,nhardt/logcabin,nhardt/logcabin,logcabin/logcabin,TigerZhang/logcabin,TigerZhang/logcabin,TigerZhang/logcabin,tempbottle/logcabin,tempbottle/logcabin,dankenigsberg/logcabin,logcabin/logcabin,dankenigsberg/logcabin,TigerZhang/logcabin,dankenigsberg/logcabin,dankenigsberg/logcabin,chaozh/logcabin,gaoning777/logcabin,jimpelton/mingle-logcabin,logcabin/logcabin,tempbottle/logcabin,nhardt/logcabin,chaozh/logcabin,gaoning777/logcabin,tempbottle/logcabin,gaoning777/logcabin,chaozh/logcabin,gaoning777/logcabin,jimpelton/mingle-logcabin,chaozh/logcabin,jimpelton/mingle-logcabin,logcabin/logcabin