ResultSelector_Overload__Flattening_From_String_Maybe_With_value_To_String_Maybe_Without_Value__Expects_String_Maybe_Without_Value()
{
const string input = "hello";
await AsyncMaybe.Value(input)
.FlatMapAsync(x => AsyncMaybe.None <string>(), (x, y) => x.Length + y.Length);
}
Flattening_From_String_Maybe_With_value_To_String_Maybe_Without_Value__Expects_String_Maybe_Without_Value()
{
const string input = "hello";
await AsyncMaybe.Value(input)
.FlatMapAsync(x => AsyncMaybe.None <int>())
.AssertNone();
}
public static AsyncMaybe <T> Flatten <T>(this AsyncMaybe <Maybe <T> > source)
{
var t = source.Match <AsyncMaybe <T> >(
some: outerValue => new AsyncMaybe <T>(Task.FromResult <Maybe <T> >(outerValue)),
none: none => AsyncMaybe <T> .None()
);
return(t.ToAsyncMaybe());
}
ResultSelector_Overload__Flattening_From_String_Maybe_Without_value_To_Nullable_Int_With_Value__Expects_String_Maybe_Without_Value()
{
int?nullableInt = 2;
await AsyncMaybe.None <string>()
.FlatMapAsync(async x => {
await AssertionUtilities.Delay;
return(nullableInt);
}, (x, y) => x.Length + y)
.AssertNone();
}
ResultSelector_Overload__Flattening_From_String_Maybe_Without_value_To_String_Maybe_Without_Value__Expects_String_Maybe_Without_Value()
{
await AsyncMaybe.None <string>()
.FlatMapAsync(x => AsyncMaybe.None <string>())
.AssertNone();
}
public static AsyncMaybe <TResult> FlatMapAsync <T, TResult>(
this AsyncMaybe <T> source,
[NotNull] Func <T, Task <AsyncMaybe <TResult> > > mapper)
{
return(source.Match(mapper, none => AsyncMaybe <TResult> .None()).ToAsyncMaybe());
}
public static AsyncMaybe <T> ToAsyncMaybe <T>(this None none)
{
return(AsyncMaybe <T> .None());
}