print_desc
print_desc(i << l2b, 0);
print_desc(block << l2b, 0);
print_desc(addr, 0);
print_desc(value, 0);
avd : AVD { print_desc(NULL, AVD); }
mvds : MVDS { print_desc(NULL, MVDS); }
rvds : RVDS { print_desc(NULL, RVDS); }
ints : INTS { print_desc(NULL, INTS); }
fsds : FSDS { print_desc(NULL, FSDS); }
root : ROOT { print_desc(NULL, ROOT); }