Initial data commit

Task/Anonymous-recursion/Objective-C/anonymous-recursion-2.m

@@ -0,0 +1,26 @@
+#import <Foundation/Foundation.h>
+
+int fib(int n) {
+    if (n < 0)
+        @throw [NSException exceptionWithName:NSInvalidArgumentException
+                                 reason:@"fib: no negative numbers"
+                               userInfo:nil];
+    int (^f)(int);
+    __block __weak int (^weak_f)(int); // block cannot capture strong reference to itself
+    weak_f = f = ^(int n) {
+        if (n < 2)
+            return 1;
+        else
+            return weak_f(n-1) + weak_f(n-2);
+    };
+    return f(n);
+}
+
+int main (int argc, const char *argv[]) {
+  @autoreleasepool {
+
+    NSLog(@"%d", fib(8));
+
+  }
+  return 0;
+}