我试图创建一个模板“AUTOCLASS”与任意一组的成员,如创建一个任意等级:C++模板:与会员专业化问题
AutoClass<int,int,double,double> a;
a.set(1,1);
a.set(0,2);
a.set(3,99.7);
std::cout << "Hello world! " << a.get(0) << " " << a.get(1) << " " << a.get(3) << std::endl;
现在我有一个AUTOCLASS用工作“设置”成员:
class nothing {};
template < typename T1 = nothing, typename T2 = nothing, typename T3 = nothing,
typename T4 = nothing, typename T5 = nothing, typename T6 = nothing>
class AutoClass;
template <>
class AutoClass<nothing, nothing, nothing,
nothing, nothing, nothing>
{
public:
template <typename U> void set(int n,U v){}
};
template < typename T1, typename T2, typename T3,
typename T4, typename T5, typename T6>
class AutoClass: AutoClass<T2,T3,T4,T5,T6>
{
public:
T1 V;
template <typename U> void set(int n,U v)
{
if (n <= 0)
V = v;
else
AutoClass<T2,T3,T4,T5,T6>::set(n-1,v);
}
};
我开始有问题实施相应的“得到”。这种方法不会编译:
template < typename T1, typename T2, typename T3,
typename T4, typename T5, typename T6>
class AutoClass: AutoClass<T2,T3,T4,T5,T6>
{
public:
T1 V;
template <typename U> void set(int n,U v)
{
if (n <= 0)
V = v;
else
AutoClass<T2,T3,T4,T5,T6>::set(n-1,v);
}
template <typename W> W get(int n)
{
if (n <= 0)
return V;
else
return AutoClass<T2,T3,T4,T5,T6>::get(n-1);
}
template <> T1 get(int n)
{
if (n <= 0)
return V;
else
return AutoClass<T2,T3,T4,T5,T6>::get(n-1);
}
};
而且,看来我需要实现获得的<nothing, nothing, nothing, nothing, nothing, nothing>
专业化。任何关于如何解决这个问题的想法?
谢谢大家,我会尝试使用Boost.Fusion来实现此目的。 – 2010-03-28 18:43:59