public static Func <T, IPromise <ControlValue <E> > > Canonical <T, E>(this PromiseFactory factory, Func <T, IPromise <NullableResult <E> > > fn)
{
return(factory.Canonical <T, E>(x => factory.SafeThen(fn(x), result =>
{
if (result == null || !result.HasResult)
{
return ControlValue <E> .Next;
}
return ControlValue <E> .Return(result.Result);
})));
}
public If ElseIf(Func <IPromise <ControlValue <bool> > > newCondition)
{
return(new If(Factory, () => Factory.SafeThen(_condition, check =>
{
if (check == null || check.State != ControlState.Return || !check.HasValue)
{
return Factory.Value(ControlValue <bool> .Break);
}
if (check.Value)
{
return Factory.Value(ControlValue <bool> .Return(false));
}
return newCondition();
})));
}
public If <T> ElseIf(Action <Scope <bool> > condition)
{
return(new If <T>(_owner, block =>
{
block.Return(() => _owner.BeginImmediately(_condition).Finish().Then(result =>
{
if (result == null || result.State != ControlState.Return || !result.HasValue)
{
return _owner.Factory.Value(result);
}
if (result.Value)
{
return _owner.Factory.Value(ControlValue <bool> .Return(false));
}
return _owner.BeginImmediately(condition).Finish();
}));
}));
}
public static Func <T, IPromise <ControlValue <E> > > Canonical <T, E>(this PromiseFactory factory, Func <T, IPromise <E> > fn)
{
return(factory.Canonical <T, E>(x => factory.SafeThen(fn(x), result => ControlValue <E> .Return(result))));
}
public static Func <IPromise <ControlValue <T> > > Canonical <T>(this PromiseFactory factory, Func <IPromise <T> > fn)
{
return(factory.Canonical(() => factory.SafeThen(fn, result => ControlValue <T> .Return(result))));
}