Data commit

Task/Anonymous-recursion/Swift/anonymous-recursion-1.swift

@@ -0,0 +1,9 @@
+let fib: Int -> Int = {
+  func f(n: Int) -> Int {
+    assert(n >= 0, "fib: no negative numbers")
+    return n < 2 ? 1 : f(n-1) + f(n-2)
+  }
+  return f
+}()
+
+print(fib(8))

Task/Anonymous-recursion/Swift/anonymous-recursion-2.swift

@@ -0,0 +1,10 @@
+let fib: Int -> Int = {
+  var f: (Int -> Int)!
+  f = { n in
+    assert(n >= 0, "fib: no negative numbers")
+    return n < 2 ? 1 : f(n-1) + f(n-2)
+  }
+  return f
+}()
+
+println(fib(8))

Task/Anonymous-recursion/Swift/anonymous-recursion-3.swift

@@ -0,0 +1,15 @@
+struct RecursiveFunc<F> {
+  let o : RecursiveFunc<F> -> F
+}
+
+func y<A, B>(f: (A -> B) -> A -> B) -> A -> B {
+  let r = RecursiveFunc<A -> B> { w in f { w.o(w)($0) } }
+  return r.o(r)
+}
+
+func fib(n: Int) -> Int {
+  assert(n >= 0, "fib: no negative numbers")
+  return y {f in {n in n < 2 ? 1 : f(n-1) + f(n-2)}} (n)
+}
+
+println(fib(8))