public static Fin <B> apply <A, B>(Fin <Func <A, B> > fab, Fin <A> fa)
{
if (fab.IsFail)
{
return(Fin <B> .Fail(fab.Error));
}
if (fa.IsFail)
{
return(Fin <B> .Fail(fa.Error));
}
return(fab.Value(fa.Value));
}
public static Fin <Func <B, C> > apply <A, B, C>(Fin <Func <A, Func <B, C> > > fabc, Fin <A> fa)
{
if (fabc.IsFail)
{
return(Fin <Func <B, C> > .Fail(fabc.Error));
}
if (fa.IsFail)
{
return(Fin <Func <B, C> > .Fail(fa.Error));
}
return(fabc.Value(fa.Value));
}
public static Fin <C> apply <A, B, C>(Fin <Func <A, B, C> > fabc, Fin <A> fa, Fin <B> fb)
{
if (fabc.IsFail)
{
return(Fin <C> .Fail(fabc.Error));
}
if (fa.IsFail)
{
return(Fin <C> .Fail(fa.Error));
}
if (fb.IsFail)
{
return(Fin <C> .Fail(fb.Error));
}
return(fabc.Value(fa.Value, fb.Value));
}
public static Try <Fin <B> > Traverse <A, B>(this Fin <Try <A> > ma, Func <A, B> f) => () =>
{
if (ma.IsFail)
{
return(new Result <Fin <B> >(ma.Cast <B>()));
}
var mr = ma.Value();
if (mr.IsBottom)
{
return(new Result <Fin <B> >(BottomException.Default));
}
if (mr.IsFaulted)
{
return(new Result <Fin <B> >(mr.Exception));
}
return(new Result <Fin <B> >(Fin <B> .Succ(f(mr.Value))));
};