public static Future <Pair <A, B> > Zip <A, B>(this Future <A> future, Future <B> other)
{
return(Future.Async <Pair <A, B> >(cb =>
{
var latch = new CountdownEvent(2);
var resA = default(A);
var resB = default(B);
Action next =
() =>
{
latch.Wait();
cb(Pair.Create(resA, resB));
};
future.RunAsync(
a =>
{
resA = a;
latch.Signal();
next();
});
other.Callback(
b =>
{
resB = b;
latch.Signal();
});
},
future.Strategy));
}
public static Future <B> Bind <A, B>(this Future <A> future, Func <A, Future <B> > f)
{
return(new Future <B>(
cb => future.Callback(a => f(a).Callback(cb)),
future.Strategy));
}
public Future <B> Map <A, B>(Future <A> future, Func <A, B> f)
{
return(new Future <B>(
cb => future.Callback(a => cb(f(a))),
future.Strategy));
}