Consider the following code that uses template SFINAE thanks to std::enable_if of C++11:

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#include <iostream>
#include <type_traits>
#include <string>

struct MyClass
{
    template<typename T, class = typename std::enable_if<std::is_arithmetic<T>::value>::type> 
    void f(const T& x) const;
    
    template<typename T, class = typename std::enable_if<!std::is_arithmetic<T>::value>::type, class = void> 
    void f(const T& x) const;
};

/// \brief Version 1
template<typename T, class> 
void MyClass::f(const T& x) const
{
    std::cout<<"Version 1"<<std::endl;
}

/// \brief Version 2
template<typename T, class, class> 
void MyClass::f(const T& x) const
{
    std::cout<<"Version 2"<<std::endl;
}

int main()
{
    MyClass myclass;
    myclass.f(3);
    myclass.f(std::string());
    return 0;
}
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Doxygen is not able to associate the documentation to each function and produces only documentation for the first one.