public static MaybeEnumerable <TInput> Do <TInput>(this MaybeEnumerable <TInput> o, Action <TInput> action)
{
if (o == null || !o.HasValue)
{
return(MaybeEnumerable <TInput> .Empty);
}
foreach (var e in o.Where(e => e.HasValue))
{
action(e.Value);
}
return(o);
}
public static MaybeEnumerable <TResult> Return <TInput, TResult>(this MaybeEnumerable <TInput> o,
Func <TInput, TResult> evaluator, Func <TResult> failureValue) =>
o == null || !o.HasValue
? MaybeEnumerable <TResult> .Empty
: new MaybeEnumerableApplicator <TInput, TResult>(o, evaluator, failureValue);
public static MaybeEnumerable <TResult> With <TInput, TResult>(this MaybeEnumerable <TInput> o, Func <TInput, TResult> evaluator) =>
o == null || !o.HasValue
? MaybeEnumerable <TResult> .Empty
: new MaybeEnumerableApplicator <TInput, TResult>(o, evaluator);
public static Maybe <T> Single <T>(this MaybeEnumerable <T> value, Func <T, bool> predicate) => SingleImpl(value, predicate);
public static Maybe <T> First <T>(this MaybeEnumerable <T> value, Func <T, bool> predicate) => FirstImpl(value, predicate);
public static ListMatcherContext <TV> Match <TV>(this MaybeEnumerable <TV> v)
{
return(new ListMatcherContext <TV>(v.Value.Select(x => x.Value).ToMaybeNonEmpty()));
}
public static MaybeEnumerable <TInput> ApplyUnless <TInput>(this MaybeEnumerable <TInput> o, Func <TInput, bool> evaluator, Func <TInput, TInput> action)
=> o == null || !o.HasValue
? MaybeEnumerable <TInput> .Empty
: new MaybeEnumerableConditionalApplicator <TInput>(o, evaluator, action, true);