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/// Defines the start, end and both bounds of a word
pub enum WordBounds {
  None,
  Start,
  End,
  Both,
}

impl WordBounds {
  /// Convert word bounds 
  pub fn to_pattern(&self, word: &str) -> String {
    match self {
      WordBounds::Start => [r#"\b"#, word].concat(),
      WordBounds::End => [word, r#"\b"#].concat(),
      WordBounds::Both => [r#"\b"#, word, r#"\b"#].concat(),
      _ => word.to_owned(),
    }
  }
}