public static Maybe <V> SelectMany <T, U, V>(this Maybe <T> maybe,
Func <T, Maybe <U> > selector,
Func <T, U, V> project)
{
return(maybe.GetValueOrDefault(
x => selector(x).GetValueOrDefault(u => project(x, u), Maybe <V> .None),
Maybe <V> .None));
}
public static List <T> ToList <T>(this Maybe <T> maybe)
{
return(maybe.GetValueOrDefault(value => new List <T> {
value
}, new List <T>()));
}
public static K Unwrap <T, K>(this Maybe <T> maybe, Func <T, K> selector, K defaultValue = default(K))
{
return(maybe.GetValueOrDefault(selector, defaultValue));
}
public static T Unwrap <T>(this Maybe <T> maybe, T defaultValue = default)
{
return(maybe.GetValueOrDefault(defaultValue));
}
public static void Deconstruct <T>(this Maybe <T> result, out bool hasValue, out T value)
{
hasValue = result.HasValue;
value = result.GetValueOrDefault();
}