Function throwError

docs/tests/v2/es6/js/sanddance.js:128860–128871

(token, messageFormat)

function throwError(token, messageFormat) {
  var error,
      args = Array.prototype.slice.call(arguments, 2),
      msg = messageFormat.replace(/%(\d)/g, function (whole, index) {
    assert(index < args.length, 'Message reference must be in range');
    return args[index];
  });
  error = new Error(msg);
  error.index = index;
  error.description = msg;
  throw error;
} // Throw an exception because of the token.


function throwUnexpected(token) {