#include <iostream>
 
struct Wibble
{
    static const bool CAN_WIBBLE = true;
};
 
struct Wobble
{
    static const bool CAN_WIBBLE = false;
};
 
struct Foo
{
    template<bool wibble>
    void _doStuff();
 
public:
    template<typename T>
    void doStuff()
    {
        _doStuff<T::CAN_WIBBLE>();
    }
};
 
template<>
void Foo::_doStuff<true>() { std::cout << "wibble ..." << std::endl; }
 
template<>
void Foo::_doStuff<false>() { std::cout << "I can't wibble ..." << std::endl; }
 
int main()
{
    Foo f;
    f.doStuff<Wibble>();
    f.doStuff<Wobble>();
    return 0;
}
 

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