Multiple callbacks for Concurrent.Future
Imported from http://bugzilla.roxen.com/bugzilla/show_bug.cgi?id=7816
Reported by Martin Karlgren email@example.com
It seems Concurrent.Future only supports one callback at a time. This can lead to unexpected effects, because earlier set callbacks are silently cleared when a new one is set.
Concurrent.Future fut1 = ... Concurrent.Future fut2 = future->flat_map(function1); Concurrent.Future fut3 = future->flat_map(function2);
Only fut3 will yield a result because the callback used by the flat_map for fut2 is cleared.
It should be possible to store the callbacks in an array instead, right?