Check if ostream object is cout or ofstream, c++ -

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is there way in c++ check if ostream object cout or ofstream object?

something like: 

ostream& output(ostream& out) {     if (out == cout)         return out;     else     {         out << "something different because not going console" << endl;         return out;     } }

the reason want this, want overload << operator 2 different things depending on type of stream used with.

is possible overload << operator twice each time different type of stream?

updated reflect intention better.

it's possible checking stream's 'identity': if ( &out == &cout ) ....

however, i'm in doubt on usefullness of test. if function can handle output stream, why bother stream using?


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