static LS nl_convertMatchExpressionToPatternList(S s) {
  new LinkedHashSet<S> patterns;
  
  for (S s2 : tok_splitAtOrOperator(s)) {
    Pair<S, LS> p = tok_parseFunctionCall(s2);
    if (p == null || !isQuoted(first(p.b))) null;
    S pat = unquote(first(p.b));
    if (eqOneOf(p.a, 'match_vbar, 'match))
      patterns.addAll(tok_splitAtVerticalBar(pat));
    else if (eqOneOf(p.a, 'matchStart_vbar, 'matchStart))
      patterns.addAll(appendToAll(" ...", tok_splitAtVerticalBar(pat)));
    else if (eqOneOf(p.a, 'matchEnd_vbar, 'matchEnd))
      patterns.addAll(prependToAll("... ", tok_splitAtVerticalBar(pat)));
    else
      fail(p.a);
  }
  
  ret asList(patterns);
}