C++根据条件为堆栈对象选择重载的构造函数

Question

我想要这样的东西:

if (customLocation.isEmpty())
{
    KUrl url;
}
else
{
    KUrl url(customLocation);
}
/* use url */

Answer 1

任何你做不到的理由

KUrl url;
if (!customLocation.isEmpty())
{
    url = KUrl(customLocation);
}
/* use url */

或

KUrl url = customLocation.isEmpty() ? KUrl() : KUrl(customLocation);