相关疑难解决方法(0)

我有以下代码:

template<typename T, typename Allocator = std::allocator<T> >
class Carray {
    // ...
    typedef T* pointer;
    typedef pointer iterator;
    // ...
};

现在我正在尝试进行部分专业化iterator_traits.对我来说似乎没问题,但g ++ 4.4.5抱怨:

#include <iterator>

namespace std {
    template<typename T, typename Allocator>
    struct iterator_traits<typename Carray<T, Allocator>::iterator> { // line 128
        typedef T value_type;
        typedef typename Allocator::difference_type difference_type;
        typedef typename Allocator::reference reference;
        typedef typename Allocator::pointer pointer;
        typedef typename std::random_access_iterator_tag iterator_category;
    };
}

这是完整的错误消息:

carray.h:128: error: template parameters not used in partial specialization:
carray.h:128: error:         ‘T’
carray.h:130: error: …