public static OptionAsync <A> ToAsync <A>(this Task <Option <A> > ma) =>
new OptionAsync <A>(OptionDataAsync.Lazy(async() =>
{
var a = await ma;
return(a.IsSome
? new Result <A>(a.Value)
: Result <A> .None);
}));
public OptionAsync <A> Return(Func <Unit, A> f) =>
new OptionAsync <A>(OptionDataAsync.Lazy(() =>
Task.Run(() =>
{
var a = f(unit);
return(a.IsNull()
? new Result <A>()
: new Result <A>(a));
})));
public OptionAsync <B> BiMap(OptionAsync <A> ma, Func <A, B> fa, Func <Unit, B> fb) =>
new OptionAsync <B>(OptionDataAsync.Lazy <B>(async() =>
await ma.Match(
Some: x => fa(x),
None: () => fb(unit))));