with-gensyms (names &body forms)

Binds each variable named by a symbol in names to a unique symbol around forms.

Each of names must either be a symbol, or of the form:

 (symbol string-designator)  

Bare symbols appearing in names are equivalent to:

 (symbol symbol)  

The string designator is used as the argument to gensym when constructing the unique symbol the named variable will be bound to.