Function toPrimitive

src/PyIterableProxyHandler.cc:69–102

}

static bool toPrimitive(JSContext *cx, unsigned argc, JS::Value *vp) {
  JS::CallArgs args = JS::CallArgsFromVp(argc, vp);

  JS::RootedObject proxy(cx, JS::ToObject(cx, args.thisv()));
  if (!proxy) {
    return false;
  }

  PyObject *self = JS::GetMaybePtrFromReservedSlot<PyObject>(proxy, PyObjectSlot);

  _PyUnicodeWriter writer;

  _PyUnicodeWriter_Init(&writer);

  PyObject *s = PyObject_Repr(self);

  if (s == nullptr) {
    args.rval().setString(JS_NewStringCopyZ(cx, "<cannot repr type>"));
    return true;
  }

  int res = _PyUnicodeWriter_WriteStr(&writer, s);
  Py_DECREF(s);

  if (res < 0) {
    args.rval().setString(JS_NewStringCopyZ(cx, "<cannot repr type>"));
    return true;
  }

  PyObject *repr = _PyUnicodeWriter_Finish(&writer);

  args.rval().set(jsTypeFactory(cx, repr));
  return true;
}

static bool iterable_valueOf(JSContext *cx, unsigned argc, JS::Value *vp) {
  return toPrimitive(cx, argc, vp);