Sequence* Sequence::createWithVariableList(FiniteTimeAction *action1, va_list args)
{
FiniteTimeAction *now;
FiniteTimeAction *prev = action1;
bool bOneAction = true;
while (action1)
{
now = va_arg(args, FiniteTimeAction*);
if (now)
{
prev = createWithTwoActions(prev, now);
bOneAction = false;
}
else
{
// If only one action is added to Sequence, make up a Sequence by adding a simplest finite time action.
if (bOneAction)
{
prev = createWithTwoActions(prev, ExtraAction::create());
}
break;
}
}
return ((Sequence*)prev);
}
里面逻辑处理难道不能改吗，一定让我们补nullptr？还是工程师在设计的时候，借鉴其他系统APi风格，所以才像这样写的？