const char *property_getAttributes(objc_property_t prop)が返すものをBNF記法で示してみよう。 <property attribtue> ::= T<type>,<attribute-list>V<property name> <property name> ::= property name <attribute-list> ::= [<attribute-list>]<attribute>, <attribute> ::= <nonatomic>|<copy>|<retain>|<readonly> <nonatomic> ::= N…</nonatomic></readonly></retain></copy></nonatomic></attribute></attribute></attribute-list></attribute-list></property></property></attribute-list></type></property>