无法将智能指针插入 Map

我试图插入我的智能指针，p_pointer指向foo类进入map，但程序无法编译 . 因此，我试图使用普通指针foo *，程序确实编译 . 到目前为止，我已经能够像普通指针一样使用p_pointer而没有任何问题，所以我很惊讶这不起作用 . 如果有人能向我解释为什么这不起作用......

*此外，我已经发布在这里，人们抱怨我的代码之前是凌乱的 . 这次我使用了代码块功能“Format use Astyle” . 如果这还不够好，请告诉我 .

#include <iostream>
    #include<map>
    #include<string>
    using namespace std;

    template <class T>
    class p_pointer
    {
    public:
        T* cp;
        size_t* refptr;

        size_t* counter()
        {
            return refptr;
        }
    //default constructor
        p_pointer():cp(0),refptr(new size_t(1)) {}
        p_pointer(T*t):cp(t),refptr(new size_t(1)) {}
    //copy constructor
        p_pointer (const p_pointer&s):cp(s.cp),refptr(s.refptr)
        {
            refptr=s.refptr;
            cp=s.cp;
            *refptr=*refptr+1;
        }
    //destructor
        ~p_pointer()
        {

            if(--*refptr==0)
            {
                delete cp;
                delete refptr;
            }
        }

    //assignment operator
        p_pointer&operator=(const p_pointer&s)
        {
            ++*s.refptr;
    //freeing the left hand size if it is the last one
            if(--*refptr==0)
            {
                delete cp;
                delete refptr;
            }
            cp=s.cp;
            refptr=s.refptr;
        }

        operator bool()
        {
            return cp;
        }

        T*&operator->()
        {
            if(cp)
                return cp;

            else throw std::runtime_error("uninitialized player");
        }

        T operator*()
        {
            if(cp)
                return *cp;
            else throw std::runtime_error("uninitialized player");
        }
    };

    class foo
    {};

 //Method 1(work)
    int main()
    {
        map<foo*,int> x;
        foo* y=new foo();
        x[y]=1;
    }

//Method 2 (does not work)

int main()
{
    map<p_pointer<foo>,int> x;
    p_pointer<foo> y=new foo();
    x[y]=1;
}

错误消息是：这是我第一次发布错误消息 . 我刚从构建消息中复制了所有内容并将其粘贴到此处 . 如果这不是最佳方式，请告诉我

|| === Build：在试用版821中调试（编译器：GNU GCC编译器）=== | C：\ CodeBlocks \ MinGW \ lib \ gcc \ mingw32 \ 4.9.2 \ include \ c \ bits \ stl_function.h ||实例化'bool std :: less <_Tp> :: operator（）（const _Tp＆，const _Tp＆）const [with _Tp = p_pointer]'：| C：\ CodeBlocks \ MinGW \ lib \ gcc \ mingw32 \ 4.9.2 \ include \ c \ bits \ stl_map.h | 498 |从'std :: map <_Key，_Tp，_Compare，_Alloc> :: mapped_type＆std中需要： ：map <_Key，_Tp，_Compare，_Alloc> :: operator []（const key_type＆）[with _Key = p_pointer; _Tp = int; _Compare = std :: less>; _Alloc = std :: allocator，int >>; std :: map <_Key，_Tp，_Compare，_Alloc> :: mapped_type = int; std :: map <_Key，_Tp，_Compare，_Alloc> :: key_type = p_pointer]'| C：\ trial 821 \ main.cpp | 80 |从这里要求| C：\ CodeBlocks \ MinGW \ lib \ gcc \ mingw32 \ 4.9.2 \ include \ c \ bits \ stl_function.h | 371 |错误：'operator <'不匹配（操作数类型为'const p_pointer'和'const p_pointer “）| C：\ CodeBlocks \ MinGW \ lib \ gcc \ mingw32 \ 4.9.2 \ include \ c \ bits \ stl_function.h | 371 |注意：候选人是：| C：\ CodeBlocks \ MinGW \ lib \ gcc \ mingw32 \ 4.9.2 \ include \ c \ bits \ stl_function.h | 371 |注意：operator <（int，int）| C：\ CodeBlocks \ MinGW \ lib \ gcc \ mingw32 \ 4.9.2 \ include \ c \ bits \ stl_function.h | 371 |注意：参数2从'const p_pointer'到'int'没有已知的转换C：\ CodeBlocks \ MinGW \ lib \ gcc \ mingw32 \ 4.9.2 \ include \ c \ bits \ stl_pair.h | 220 |注意：模板constexpr bool std :: operator <（const std :: pair <_T1，_T2> ＆，const std :: pair <_T1，_T2>＆）| C：\ CodeBlocks \ MinGW \ lib \ gcc \ mingw32 \ 4.9.2 \ include \ c \ bits \ stl_pair.h | 220 |注意：模板参数扣除/替换失败：| C：\ CodeBlocks \ MinGW \ lib \ gcc \ mingw32 \ 4.9.2 \ include \ c \ bits \ stl_function.h | 371 |注意：'const p_pointer'不是从'const std :: pair <_T1，_T2>派生的“| C：\ CodeBlocks \ MinGW \ lib \ gcc \ mingw32 \ 4.9.2 \ include \ c \ bits \ stl_iterator.h | 298 |注意：模板bool std :: operator <（const std :: reverse_iterator <_Iterator>＆，const的std :: reverse_iterator的<_Iterator>＆）| C：\ CodeBlocks \ MinGW \ lib \ gcc \ mingw32 \ 4.9.2 \ include \ c \ bits \ stl_iterator.h | 298 |注意：模板参数扣除/替换失败：| C：\ CodeBlocks \ MinGW \ lib \ gcc \ mingw32 \ 4.9.2 \ include \ c \ bits \ stl_function.h | 371 |注意：'const p_pointer'不是从'const std :: reverse_iterator <_Iterator>'派生的C：\ CodeBlocks \ MinGW \ lib \ gcc \ mingw32 \ 4.9.2 \ include \ c \ bits \ stl_iterator.h | 348 |注意：模板bool std :: operator <（const std :: reverse_iterator <_Iterator>＆，const的std :: reverse_iterator的<_IteratorR>＆）| C：\ CodeBlocks \ MinGW \ lib \ gcc \ mingw32 \ 4.9.2 \ include \ c \ bits \ stl_iterator.h | 348 |注意：模板参数扣除/替换失败：| C：\ CodeBlocks \ MinGW \ lib \ gcc \ mingw32 \ 4.9.2 \ include \ c \ bits \ stl_function.h | 371 |注意：'const p_pointer'不是从'const std :: reverse_iterator <_Iterator>'派生的C：\ CodeBlocks \ MinGW \ lib \ gcc \ mingw32 \ 4.9.2 \ include \ c \ bits \ stl_iterator.h | 1072 |注意：模板bool std :: operator <（const std :: move_iterator <_Iterator>＆，const的std :: move_iterator <_IteratorR>＆）| C：\ CodeBlocks \ MinGW \ lib \ gcc \ mingw32 \ 4.9.2 \ include \ c \ bits \ stl_iterator.h | 1072 |注意：模板参数扣除/替换失败：| C：\ CodeBlocks \ MinGW \ lib \ gcc \ mingw32 \ 4.9.2 \ include \ c \ bits \ stl_function.h | 371 |注意：'const p_pointer'不是从'const std :: move_iterator <_Iterator>'派生的C：\ CodeBlocks \ MinGW \ lib \ gcc \ mingw32 \ 4.9.2 \ include \ c \ bits \ stl_iterator.h | 1078 |注意：模板bool std :: operator <（const std :: move_iterator <_Iterator>＆，const的std :: move_iterator <_Iterator>＆）| C：\ CodeBlocks \ MinGW \ lib \ gcc \ mingw32 \ 4.9.2 \ include \ c \ bits \ stl_iterator.h | 1078 |注意：模板参数扣除/替换失败：| C：\ CodeBlocks \ MinGW \ lib \ gcc \ mingw32 \ 4.9.2 \ include \ c \ bits \ stl_function.h | 371 |注意：'const p_pointer'不是从'const派生的的std :: move_iterator <_Iterator>'| C：\ CodeBlocks \ MinGW \ lib \ gcc \ mingw32 \ 4.9.2 \ include \ c \ bits \ basic_string.h | 2588 |注意：模板bool std :: operator <（const std :: basic_string <_CharT，_Traits，_Alloc >＆，const std :: basic_string <_CharT，_Traits，_Alloc>＆）| C：\ CodeBlocks \ MinGW \ lib \ gcc \ mingw32 \ 4.9.2 \ include \ c \ bits \ basic_string.h | 2588 |注意：模板参数扣除/替换失败：| C：\ CodeBlocks \ MinGW \ lib \ gcc \ mingw32 \ 4.9.2 \ include \ c \ bits \ stl_function.h | 371 |注意：'const p_pointer'不是从'const std :: basic_string <_CharT，_Traits派生的， _Alloc>“| C：\ CodeBlocks \ MinGW \ lib \ gcc \ mingw32 \ 4.9.2 \ include \ c \ bits \ basic_string.h | 2600 |注意：模板bool std :: operator <（const std :: basic_string <_CharT，_Traits，_Alloc >＆，const _CharT *）| C：\ CodeBlocks \ MinGW \ lib \ gcc \ mingw32 \ 4.9.2 \ include \ c \ bits \ basic_string.h | 2600 |注意：模板参数扣除/替换失败：| C：\ CodeBlocks \ MinGW \ lib \ gcc \ mingw32 \ 4.9.2 \ include \ c \ bits \ stl_function.h | 371 |注意：'const p_pointer'不是从'const std :: basic_string <_CharT，_Traits派生的， _Alloc>“| C：\ CodeBlocks \ MinGW \ lib \ gcc \ mingw32 \ 4.9.2 \ include \ c \ bits \ basic_string.h | 2612 |注意：模板bool std :: operator <（const _CharT *，const std :: basic_string <_CharT ，_Traits，_Alloc>＆）| C：\ CodeBlocks \ MinGW \ lib \ gcc \ mingw32 \ 4.9.2 \ include \ c \ bits \ basic_string.h | 2612 |注意：模板参数扣除/替换失败：| C：\ CodeBlocks \ MinGW \ lib \ gcc \ mingw32 \ 4.9.2 \ include \ c \ bits \ stl_function.h | 371 |注意：不匹配的类型'const _CharT *'和'p_pointer'| C：\ CodeBlocks \ MinGW \ lib \ gcc \ mingw32 \ 4.9.2 \ include \ c \ bits \ stl_tree.h | 980 |注意：模板bool std :: operator <（const std :: _ Rb_tree <_Key，_Val，_KeyOfValue ，Compare， Alloc>＆，const std :: _ Rb_tree <_Key，_Val，_KeyOfValue，_Compare，_Alloc>＆）| C：\ CodeBlocks \ MinGW \ lib \ gcc \ mingw32 \ 4.9.2 \ include \ c \ bits \ stl_tree.h | 980 |注意：模板参数扣除/替换失败：| C：\ CodeBlocks \ MinGW \ lib \ gcc \ mingw32 \ 4.9.2 \ include \ c \ bits \ stl_function.h | 371 |注意：'const p_pointer'不是从'const std :: _ Rb_tree <_Key，_Val派生的， _KeyOfValue，Compare， Alloc>'| C：\ CodeBlocks \ MinGW \ lib \ gcc \ mingw32 \ 4.9.2 \ include \ c \ array | 242 |注意：模板bool std :: operator <（const std :: array <_Tp，_Nm>＆，const std： ：array <_Tp，_Nm>＆）| C：\ CodeBlocks \ MinGW \ lib \ gcc \ mingw32 \ 4.9.2 \ include \ c \ array | 242 |注意：模板参数扣除/替换失败：| C：\ CodeBlocks \ MinGW \ lib \ gcc \ mingw32 \ 4.9.2 \ include \ c \ bits \ stl_function.h | 371 |注意：'const p_pointer'不是从'const std :: array <_Tp，_Nm>派生的“| C：\ CodeBlocks \ MinGW \ lib \ gcc \ mingw32 \ 4.9.2 \ include \ c \ tuple | 857 |注意：模板constexpr bool std :: operator <（const std :: tuple <_Args1 ...>＆，const std :: tuple <_Args2 ...>＆）| C：\ CodeBlocks \ MinGW \ lib \ gcc \ mingw32 \ 4.9.2 \ include \ c \ tuple | 857 |注意：模板参数扣除/替换失败：| C：\ CodeBlocks \ MinGW \ lib \ gcc \ mingw32 \ 4.9.2 \ include \ c \ bits \ stl_function.h | 371 |注意：'const p_pointer'不是来自'const std :: tuple <_Args1 ... >“| C：\ CodeBlocks \ MinGW \ lib \ gcc \ mingw32 \ 4.9.2 \ include \ c \ bits \ stl_map.h | 1017 |注意：模板bool std :: operator <（const std :: map <_Key，_Tp，_Compare ，_Alloc>＆，const std :: map <_Key，_Tp，_Compare，_Alloc>＆）| C：\ CodeBlocks \ MinGW \ lib \ gcc \ mingw32 \ 4.9.2 \ include \ c \ bits \ stl_map.h | 1017 |注意：模板参数扣除/替换失败：| C：\ CodeBlocks \ MinGW \ lib \ gcc \ mingw32 \ 4.9.2 \ include \ c \ bits \ stl_function.h | 371 |注意：'const p_pointer'不是从'const std :: map <_Key，_Tp派生的， Compare， Alloc>'| C：\ CodeBlocks \ MinGW \ lib \ gcc \ mingw32 \ 4.9.2 \ include \ c \ bits \ stl_multimap.h | 920 |注意：模板bool std :: operator <（const std :: multimap <_Key，_Tp，_Compare ，_Alloc>＆，const std :: multimap <_Key，_Tp，_Compare，_Alloc>＆）| C：\ CodeBlocks \ MinGW \ lib \ gcc \ mingw32 \ 4.9.2 \ include \ c \ bits \ stl_multimap.h | 920 |注意：模板参数扣除/替换失败：| C：\ CodeBlocks \ MinGW \ lib \ gcc \ mingw32 \ 4.9.2 \ include \ c \ bits \ stl_function.h | 371 |注意：'const p_pointer'不是从'const std :: multimap <_Key，_Tp派生的， Compare， Alloc>'| || ===构建失败：1个错误，3个警告（0分钟，0秒（秒））=== |