private static bool Equals(NullableOf <T> left, NullableOf <T> right)
{
return
(left.HasValue != right.HasValue ? false :
!left.HasValue ? true :
EqualityComparer <T> .Default.Equals(left.value, right.value));
}
public static Nullable <TResult> SelectMany <T, TMid, TResult>(this NullableOf <T> @this, Func <T, Nullable <TMid> > midSelector, Func <T, TMid, TResult> resultSelector, RequireStruct <TResult> _ = default(RequireStruct <TResult>))
where T : class
where TMid : struct
where TResult : struct
{
if ([email protected])
{
return(default(Nullable <TResult>));
}
var mid = midSelector((T)@this);
if (!mid.HasValue)
{
return(default(Nullable <TResult>));
}
return(resultSelector((T)@this, (TMid)mid));
}
public bool Equals(NullableOf <T> that)
{
return(Equals(this, that));
}
public static Nullable <TResult> Select <T, TResult>(this NullableOf <T> @this, Func <T, TResult> func, RequireStruct <TResult> _ = default(RequireStruct <TResult>))
where T : class
where TResult : struct
{
return(@this.HasValue ? func((T)@this) : default(Nullable <TResult>));
}
