svoid tok_numberFunctionNames(LS tok) {
  int n = l(tok);
  new L<IntRange> reToks;
  for (int i = 1; i < n-2; i += 2) {
    S number, id;
    if (isInteger(number = tok.get(i)) && empty(tok.get(i+1)) && isIdentifier(id = tok.get(i+2))) pcall {
    
      continue if eq(number, "0") && swic(id, "x"); // skip hex constants
      continue if eqic(id, "f"); // skip float constants
      
      // skip exponential floating-point constants (e.g. 1e6)
      if (eqic(id, "e")) {
        S space = get(tok, i+3);
        S next = get(tok, i+4);
        printVars(+space, +next);
        if (empty(space) && (isInteger(next) || eq(next, "-")) )
          continue;
      }
        
      replaceTokens_reTokLater(tok, reToks, i, i+3, camelCase(numberToEnglish(parseLong(number))) + firstToUpper(id));
    }
  }
  reTok_multi(tok, reToks);
}