rl_to_binfo
struct bit_info *rl_to_binfo(struct range_list *rl);
extra_info = rl_to_binfo(rl);
rl_binfo = rl_to_binfo(rl);
implied_binfo = rl_to_binfo(estate_rl(estate));
p = rl_to_binfo(estate_rl(estate));
one = rl_to_binfo(left);
two = rl_to_binfo(right);