public static bool IsHollistic(this SequencePredicate predicate)
{
switch (predicate)
{
case SequencePredicate.Any:
case SequencePredicate.NotAll:
return(false);
case SequencePredicate.All:
case SequencePredicate.None:
return(true);
default: throw predicate.Unexpected();
}
}
public static SequencePredicate Negative(this SequencePredicate predicate)
{
switch (predicate)
{
case SequencePredicate.Any: return(SequencePredicate.None);
case SequencePredicate.All: return(SequencePredicate.NotAll);
case SequencePredicate.None: return(SequencePredicate.None);
case SequencePredicate.NotAll: return(SequencePredicate.NotAll);
default: throw predicate.Unexpected();
}
}
public static bool Predicate <T>(this IEnumerable <T> source, Func <T, bool> predicate, SequencePredicate predicateType)
{
switch (predicateType)
{
case SequencePredicate.Any: return(source.Any(predicate));
case SequencePredicate.All: return(source.All(predicate));
case SequencePredicate.None: return(source.None(predicate));
case SequencePredicate.NotAll: return(source.NotAll(predicate));
default: throw predicateType.Unexpected();
}
}
public static bool IsIndividual(this SequencePredicate predicate)
{
return(!predicate.IsHollistic());
}
public static bool IsNegative(this SequencePredicate predicate)
{
return(!predicate.IsPositive());
}