function lineContinuation(kind: string) -> Option<LineContinuation> {
  if kind == "gt" || kind == "gt-gt" || kind == "keyword/else" {
    Some(LineContinuation.Leading)
  } else if kind == "plus" || kind == "minus" || kind == "bang" ||
    kind == "tilde" || kind == "comma" || kind == "fat-arrow" ||
    kind == "left-paren" || kind == "left-bracket" {
    Some(LineContinuation.Trailing)
  } else if kind == "star-star" || kind == "star" || kind == "slash" ||
    kind == "percent" || kind == "dot-dot" || kind == "dot-dot-lt" ||
    kind == "lt" || kind == "le" || kind == "ge" || kind == "eq-eq" ||
    kind == "not-eq" || kind == "keyword/in" || kind == "and-and" ||
    kind == "or-or" || kind == "question-question" || kind == "pipe-gt" ||
    kind == "eq" || kind == "plus-eq" || kind == "minus-eq" ||
    kind == "star-eq" || kind == "slash-eq" || kind == "percent-eq" ||
    kind == "question-question-eq" || kind == "dot" ||
    kind == "question-dot" || kind == "keyword/by" {
    Some(LineContinuation.Both)
  } else {
    None
  }
}