I have a header file containing:

class ClassName {
...

////////////////////////////////////////////////////////////////////////////////////////////////////
/// \fn boost::function<int(void *, char *)> ClassName::getFnPtr();
///
/// \brief ...
///
/// \author ...
/// \date ...
///
/// \return A boost function object ...
////////////////////////////////////////////////////////////////////////////////////////////////////

boost::function<int(void *, char *)> getFnPtr();

...
};

When running Doxygen, getFnPtr() is reported under "Public Attributes" instead of "Public Member Functions" even though the parentheses are present after the identifier.

Removing the \fn line from the comments causes the generated documentation to not include the brief text. With the \fn line the brief text is included in the generated documentation. Either way the member function is incorrectly documented under member attributes.

There is a Stack Overflow post about this:
http://stackoverflow.com/questions/10854344/why-is-doxygen-reporting-this-method-as-an-attribute