Which languages support *recursive* function literals / anonymous functions?

Question

It seems quite a few mainstream languages support function literals these days. They are also called anonymous functions, but I don\'t care if they have a name. The important th

Answer 1

Clojure can do it, as fn takes an optional name specifically for this purpose (the name doesn't escape the definition scope):

> (def fac (fn self [n] (if (< n 2) 1 (* n (self (dec n))))))
#'sandbox17083/fac
> (fac 5)
120
> self
java.lang.RuntimeException: Unable to resolve symbol: self in this context

If it happens to be tail recursion, then recur is a much more efficient method:

> (def fac (fn [n] (loop [count n result 1]
                     (if (zero? count)
                       result
                       (recur (dec count) (* result count))))))