| *gensym-counter* | Variable |
a non-negative integer.
A number which will be used in constructing the name of the next symbol generated by the function gensym.
*gensym-counter* can be either assigned or bound at any time, but its value must always be a non-negative integer.
The ability to pass a numeric argument to gensym has been deprecated; explicitly binding *gensym-counter* is now stylistically preferred.