internal FeatureCover(FeatureInstance feature, ParsedUtterance utterance)
{
OriginalUtterance = utterance;
_coveredPositions = new bool[feature.MaxOriginPosition + 1];
FeatureInstances = new[] { feature };
indexPositions(feature);
FeatureKey = createFeatureKey();
}
private FeatureCover(FeatureCover previousCover, FeatureInstance extendingFeature)
{
OriginalUtterance = previousCover.OriginalUtterance;
_coveredPositions = previousCover._coveredPositions.ToArray();
FeatureInstances = previousCover.FeatureInstances.Concat(new[] { extendingFeature }).OrderBy(f => f.CoveredPositions.First()).ToArray();
indexPositions(extendingFeature);
FeatureKey = createFeatureKey();
}