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c++ - Is there a shorter way to forward declare a class in a namespace?

I can forward declare a function in a namespace by doing this:

void myNamespace::doThing();

which is equivalent to:

namespace myNamespace
{
  void doThing();
}

To forward declare a class in a namespace:

namespace myNamespace
{
  class myClass;
}

Is there a shorter way to do this? I was thinking something along the lines of:

class myNamespace::myClass;
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No, however with a little reformatting

namespace myNamespace { class myClass; }

isn't much worse than

class myNamespace::myClass;

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