// Transforms an IEnumerable into another by specific rules.
public static IEnumerable <TOut> Transform <TIn, TOut> (this IEnumerable <TIn> input, params EmitterFunc <TIn, TOut> [] rules)
{
CloneableEnumerator <TIn> enumerator = new CloneableEnumerator <TIn> (input, 0);
while (enumerator.MoveNext())
{
InputData <TIn> inputData = new InputData <TIn> (input, enumerator);
foreach (var rule in rules)
{
TOut output;
if (rule(inputData.NewContext(), out output) == RuleResult.MatchEmit)
{
yield return(output);
}
}
}
}