RSTRUCT_EMBED_LEN_SHIFT  720 include/ruby/ruby.h      (long)((RBASIC(st)->flags >> RSTRUCT_EMBED_LEN_SHIFT) & \
RSTRUCT_EMBED_LEN_SHIFT  721 include/ruby/ruby.h             (RSTRUCT_EMBED_LEN_MASK >> RSTRUCT_EMBED_LEN_SHIFT)) : \
RSTRUCT_EMBED_LEN_SHIFT  390 struct.c               RBASIC(st)->flags |= n << RSTRUCT_EMBED_LEN_SHIFT;