ref_hash 3683 ext/date/date_core.c #define ref_hash(k) rb_hash_aref(hash, ID2SYM(rb_intern(k))) ref_hash 41 ext/date/date_parse.c #define ref_hash(k) rb_hash_aref(hash, ID2SYM(rb_intern(k))) ref_hash 117 ext/date/date_strptime.c #define ref_hash(k) rb_hash_aref(hash, ID2SYM(rb_intern(k)))