Rakudo now supports the fff form of the flip-flop operators.

jnthn · jnthn · commit 0146fa617962 · 2012-05-08T14:55:44.000+02:00
diff --git a/features.json b/features.json
@@ -626,7 +626,7 @@
         "spec"    : [ ]
       }, {
         "item"    : "Flipflop",
-        "status"  : "r+- (only ff versions, no fff) n+",
+        "status"  : "r+ n+",
         "code"    : [ ],
         "spec"    : [ ]
       }, {
