// only one multi-type argument per declaration for now

// also allows only one combo right now (File/S with newFile)

// example:

// sS loadTextFile(File/S file) { ... }

svoid tok_expandMultiTypeArgument(LS tok,

  int iArgStart, int iArgEnd, // start and end of argument

  S argName, S mainType, S altType, S conversionExpr) {

  iArgEnd |= 1;

  int iOpening = lastIndexOf(tok, iArgStart, "("); // TODO: brackets

  int iClosing = findEndOfBracketPart2(tok, iOpening)-1;

  // function name

  int iName = iOpening-2;

  S name = assertIdentifier(get(tok, iName));

  int iType = tok_leftScanType(tok, iName);

  int iStart = tok_leftScanTypeArgsOpt(tok, iType);

  iStart = leftScanModifiers(tok, iStart);

  //print("Found method head: " + joinSubList(tok, iStart, iClosing+1));

  LS _args1 = subList(tok, iOpening+1, iArgStart);

  LS _args2 = subList(tok, iArgEnd&~1, iClosing);

  LS args1 = tok_parseArgsDeclList2(_args1);

  LS args2 = tok_parseArgsDeclList2(_args2);

  LS type = subList(tok, iType-1, iName);

  bool isVoid = containsOneOf(codeTokens(type), javaxVoidAliases());

  //printVars(+expr, +_args1, +_args2, +args1, +args2, +type, +isVoid);

  S altHead = joinSubList(tok, iStart, iOpening+1)

    + joinWithComma(concatLists(

        args1,

        ll(altType + " " + argName),

        args2)) + ")";

  if (tok_isSingleIdentifier(conversionExpr))

    conversionExpr += "(\*argName*/)";

  replaceTokens_reTok(tok, iArgStart|1, iArgEnd, mainType + " " + argName);

  tokPrepend_reTok(tok, iStart, altHead + " { "

    + (isVoid ? "" : "return ") + name + "(" + 

      joinWithComma(concatLists(

        map tok_lastIdentifier(args1),

        ll(conversionExpr),

        map tok_lastIdentifier(args2))) + "); }\n");

}