public static TMonadPlus Guard <TMonadPlus>(bool b)
where TMonadPlus : IMonadPlus <Unit>
{
var monadPlusAdapter = MonadPlusAdapterRegistry.Get <Unit>(typeof(TMonadPlus));
return((TMonadPlus)(b ? monadPlusAdapter.Return(new Unit()) : monadPlusAdapter.MZero));
}
public static TMonadPlus MSum <TMonadPlus, TA>(IEnumerable <IMonadPlus <TA> > ms)
where TMonadPlus : IMonadPlus <TA>
{
var monadPlusAdapter = MonadPlusAdapterRegistry.Get <TA>(typeof(TMonadPlus));
return((TMonadPlus)ms.FoldRight(monadPlusAdapter.MZero, monadPlusAdapter.MPlus));
}
public static TMonadPlus LookupM <TMonadPlus, TA, TB>(TA k, IEnumerable <Tuple <TA, TB> > alist)
where TMonadPlus : IMonadPlus <TB>
{
var monadPlusAdapter = MonadPlusAdapterRegistry.Get <TB>(typeof(TMonadPlus));
return(LookupMInternal <TMonadPlus, TA, TB>(k, alist, monadPlusAdapter));
}
public static TMonadPlus MFilter <TMonadPlus, TA>(Func <TA, bool> p, IMonadPlus <TA> ma)
where TMonadPlus : IMonadPlus <TA>
{
var monadPlusAdapter = MonadPlusAdapterRegistry.Get <TA>(typeof(TMonadPlus));
return((TMonadPlus)monadPlusAdapter.Bind(
ma, a => p(a) ? monadPlusAdapter.Return(a) : monadPlusAdapter.MZero));
}
public void Test1()
{
var maybeMonadPlusAdapter = MonadPlusAdapterRegistry.Get<int>(typeof (Maybe<>));
var maybe = (Maybe<int>)maybeMonadPlusAdapter.Return(42);
Assert.That(maybe.FromJust, Is.EqualTo(42));
}
public MonadPlusAdapter <TA> GetMonadPlusAdapter()
{
return(MonadPlusAdapterRegistry.Get <TA>(typeof(Maybe <>)));
}