!7

sclass Bla {
  S ok(S s) { ret s + " " + s; }
  S ok(S s, S... x) { ret s + " " + joinWithComma(x); }
  S single(S... x) { ret joinWithComma(x); }
}

p-exp {
  assertEqualsVerbose("hello hello", call_withVarargs(new Bla, 'ok, 'hello));
  assertEqualsVerbose("hello what's, up", call_withVarargs(new Bla, 'ok, 'hello, "what's", 'up));
  
  assertEqualsVerbose("hello hello", callOpt_withVarargs(new Bla, 'ok, 'hello));
  assertEqualsVerbose("hello what's, up", callOpt_withVarargs(new Bla, 'ok, 'hello, "what's", 'up));
  assertNullVerbose(callOpt_withVarargs(new Bla, 'ok, "", 5));
  
  assertEqualsVerbose("a, b", callOpt_withVarargs(new Bla, 'single, 'a, 'b));
}