private static ParserResult <object> MatchVerb(
Func <IEnumerable <string>, IEnumerable <OptionSpecification>, StatePair <IEnumerable <Token> > > tokenizer,
IEnumerable <Tuple <Verb, Type> > verbs,
IEnumerable <string> arguments,
StringComparer nameComparer,
CultureInfo parsingCulture)
{
return(verbs.Any(a => nameComparer.Equals(a.Item1.Name, arguments.First()))
? InstanceBuilder.Build(
() => Activator.CreateInstance(verbs.Single(v => nameComparer.Equals(v.Item1.Name, arguments.First())).Item2),
tokenizer,
arguments.Skip(1),
nameComparer,
parsingCulture)
: ParserResult.Create <object>(
ParserResultType.Verbs,
new NullInstance(),
new[] { new BadVerbSelectedError(arguments.First()) },
Maybe.Just(verbs.Select(v => v.Item2))));
}