apply-template

For use in macros.  argv is an argument list, as in defn.  expr is
a quoted expression using the symbols in argv.  values is a sequence
of values to be used for the arguments.
 apply-template will recursively replace argument symbols in expr
with their corresponding values, returning a modified expr.
 Example: (apply-template '[x] '(+ x x) '[2])
         ;=> (+ 2 2)