sbool matchUsingFunctionNameAndPattern(FunctionNameAndPattern fp, S s, Matches m) {
  if (fp == null) false;
  S f = fp.function, pat = fp.pattern;
  if (eqOneOf(f, "if", "match", "match3")) ret match(pat, s, m);
  if f eq "matchX" ret matchX(pat, s, m);
  if f eq "matchX2" ret matchX2(pat, s, m);
  if f eq "matchX_vbar" ret matchX_vbar(pat, s, m);
  warn("Unknown function: " + fp);
  false;
}

sbool matchUsingFunctionNameAndPattern(FunctionNameAndPattern fp, S s) {
  ret matchUsingFunctionNameAndPattern(fp, s, null);
}