Function pToString

docs/tests/v2/es6/js/sanddance.js:8342–8344

(obj)

  return function foo() {}.name === 'foo';
}());
function pToString (obj) {
  return Object.prototype.toString.call(obj);
}
function isView(arrbuf) {
  if (isBuffer(arrbuf)) {
    return false;