chickadee » serial » sn+

(sn+ serial fixnum #!key (bits (current-serial-bits)))procedure

Adds fixnum to the supplied serial and returns the result of the addition. Note that this procedure may wrap the value if the given serial is the upper boundary value of the range of integers that can be represented using bits bits. This means that (sn> (sn+ serial 1) serial) may be false in this situation.