Question

我完全无法解决以下编译错误：

#include <iostream>
#include <boost/lockfree/queue.hpp>

class C 
{
public:
static int size;
};

int C::size = 10;

template <class temp>
class B: public temp
{
class A
{
public:

    static A pool[temp::size];

    static boost::lockfree::queue<A*> mpool;

    static bool firstTime;

};
public:
    void show() { std::cout << "Called Show" << std::endl; }
};

template <class temp>
bool B<temp>::A::firstTime = true;

template <class temp>
typename  B<temp>::A B<temp>::A::pool[temp::size];

template <class temp>
boost::lockfree::queue<B<temp>::A*> B<temp>::A::mpool(temp::size);

int main()
{
B<C> d;
d.show();
}

它说明了以下错误 - 我努力但却无法解决问题 - 需要帮助：

test11.cpp:37:39: error: type/value mismatch at argument 1 in template parameter list for 'template<class T, class A0, class A1, class A2> class boost::lockfree::queue'
     boost::lockfree::queue<B<temp>::A*> B<temp>::A::mpool(temp::size);
                                       ^
test11.cpp:37:39: error:   expected a type, got '(B<temp>::A * <expression error>)'
test11.cpp:37:58: error: invalid type in declaration before '(' token
     boost::lockfree::queue<B<temp>::A*> B<temp>::A::mpool(temp::size);
                                                          ^
test11.cpp:37:58: error: conflicting declaration 'int B<temp>::A::mpool'
test11.cpp:21:40: note: previous declaration as 'boost::lockfree::queue<B<temp>::A*> B<temp>::A::mpool'
      static boost::lockfree::queue<A*> mpool;
                                        ^
test11.cpp:37:58: error: declaration of 'boost::lockfree::queue<B<temp>::A*> B<temp>::A::mpool' outside of class is not definition [-fpermissive]
     boost::lockfree::queue<B<temp>::A*> B<temp>::A::mpool(temp::size);

Answer 1

您在这里错过了一个typename声明。

template<class T> boost::lockfree::queue<typename B<T>::A*> B<T>::A::mpool(T::size);

B<T>::A是一个类型名称并不明显。

冲突的声明类型/值不匹配

1 个答案: