In a templated class doxygen is unable to reference or link operator overloads, while on a regular member function @ref and @link work fine. See example below.

/** the example class Foo
===
In class @ref Foo<T> "Foo" you cannot reference to operators like @ref Foo<T>::operator+() but to functions like @ref Foo<T>::foo() you can.

The same goes with linking
@link Foo<T>::operator+()
operator+()
@endlink
and
@link Foo<T>::foo()
foo()
@endlink
*/
template<typename T>
class Foo
{
public:
    Foo() {}
    /** operator+ for Foo.*/
    void operator+() {}
    /** foo function instead of operator.*/
    void foo() {}
};