///|
/// Selects a deterministic string-similarity metric.
pub(all) enum SimilarityMetric {
  Levenshtein
  Jaro
  JaroWinkler(Double)
  Dice(Int)
} derive(Eq, Debug)

///|
/// Reports an invalid metric parameter.
pub(all) enum SimilarityError {
  InvalidWinklerScaling(Double)
  InvalidNGramSize(Int)
} derive(Eq, Debug)