How do I put some code into multiple namespaces without duplicating this code?

Question

Assume I have the method defined in the two different namespaces:

namespace foo
{
    void print()
    {
        //do work...
    }
}

namespace bar
{
    void print()
    {
        //do work...
    }
}

The foo::print() and the bar::print() functions are absolutely equal. My project uses the numerous calls of these functions.

Is there a way to remove one of the print() definitions without changing the calls of these function? I mean something like the following (of course, C++ language doesn't allow this construction, it's just an example):

namespace foo, bar  //wrong code!
{
    void print()
    {
        //do work...
    }
}

If there is no way to refactor the code as I want, please tell me, do you like the following decision? Will you be glad if your project contains such code? :)

namespace foo
{
    void print()
    {
        //do work...
    }
}

namespace bar
{
    void print()
    {
        foo::print();
    }
}

ADD:

Thank you guys, I'm fully satisfied by your answers. Just one moment I want you to clarify: is there a difference between using ::foo::print and using foo::print?

Answer 1

You can achieve this with a using declaration.

namespace foo
{
    void print()
    {
        //do work...
    }
}

namespace bar
{
    using foo::print;
}

EDIT

Regarding the difference between ::foo::print and foo::print: prepending a qualified name with :: means that you explicitly refer to the one in the global namespace. This can be used to select the global one, even if there is another item with the same name closer in scope.