public static bool Evaluate <T>(this CollectionOperator @operator, IEnumerable <T> collection, Func <T, bool> predicate)
{
@operator.Validate(nameof(@operator));
if (collection == null)
{
throw new ArgumentNullException(nameof(collection));
}
if (predicate == null)
{
throw new ArgumentNullException(nameof(predicate));
}
var isOdd = ((int)@operator) % 2 == 1;
return(EvaluateInternal(isOdd ? @operator + 1 : @operator) ^ isOdd);
bool EvaluateInternal(CollectionOperator effectiveOperator)
{
return(effectiveOperator switch
{
CollectionOperator.Any => collection.Any(predicate),
CollectionOperator.All => collection.All(predicate),
_ => throw new NotSupportedException($"CollectionOperator of {@operator} is not supported"),
});
}
public static CollectionOperator Invert(this CollectionOperator @operator)
{
@operator.Validate(nameof(@operator));
return(@operator + (((int)@operator) % 2 == 0 ? 1 : -1));
}