Boolean compound assignment operators should short-circuit if possible

main.dart

bool longComp() {
  print('doing long computation');
  return true;
}

void main() {
  var t = true;
  var f = false;
 
  t |= longComp(); // prints 'doing long computation'
  f &= longComp(); // prints 'doing long computation'
  
  t = t || longComp(); // short-circuits, nothing is printed
  f = f && longComp(); // short-circuits, nothing is printed
}