C++ 共享ptr的连接向量

我以以下方式使用智能指针：

typedef std::tr1::shared_ptr<RealAlgebraicNumber> RealAlgebraicNumberPtr;

typedef std:：tr1:：shared_ptr realagebraicnumberpt；

我使用智能指针是因为RealAlgebraicNumber是一个“抽象”超类。它工作得很好，现在我想要一个类来封装一个向量。看起来是这样的：

class RealAlgebraicPoint
{
public:
    RealAlgebraicPoint (vector<RealAlgebraicNumberPtr>& v);
    RealAlgebraicPoint (RealAlgebraicPoint& R);
    RealAlgebraicPoint conjoin (const RealAlgebraicNumber& N);
private:
    vector<RealAlgebraicNumberPtr> mNumbers;
    unsigned int mSize;
};

RealAlgebraicPoint::RealAlgebraicPoint(vector<RealAlgebraicNumberPtr>& v)
    : mNumbers(v), mSize(mNumbers.size()) {}
RealAlgebraicPoint::RealAlgebraicPoint(RealAlgebraicPoint& R)
    : mNumbers(R.mNumbers), mSize(mNumbers.size()) {}
RealAlgebraicPoint RealAlgebraicPoint::conjoin (const RealAlgebraicNumber& N)
{
    vector<RealAlgebraicNumberPtr> v;
    // do something fancy with v!
    return RealAlgebraicPoint(v); // this is line 58
}

RealAlgebraicPoint.cpp: In member function 'GiNaC::RealAlgebraicPoint GiNaC::RealAlgebraicPoint::conjoin(const GiNaC::RealAlgebraicNumber&)':
RealAlgebraicPoint.cpp:58:32: error: no matching function for call to 'GiNaC::RealAlgebraicPoint::RealAlgebraicPoint(GiNaC::RealAlgebraicPoint)'
RealAlgebraicPoint.cpp:46:1: note: candidates are: GiNaC::RealAlgebraicPoint::RealAlgebraicPoint(GiNaC::RealAlgebraicPoint&)
RealAlgebraicPoint.cpp:42:1: note: GiNaC::RealAlgebraicPoint::RealAlgebraicPoint(std::vector<std::tr1::shared_ptr<GiNaC::RealAlgebraicNumber> >&)
RealAlgebraicPoint.cpp:38:1: note: GiNaC::RealAlgebraicPoint::RealAlgebraicPoint(unsigned int&)

class RealAlgebraicPoint
{
公众：
实代数点（向量&v）；
RealAlgebraicPoint（RealAlgebraicPoint&R）；
实代数点连接（常数实代数数&N）；
私人：
向量数；
无符号整数mSize；
};

具体实施如下：

class RealAlgebraicPoint
{
public:
    RealAlgebraicPoint (vector<RealAlgebraicNumberPtr>& v);
    RealAlgebraicPoint (RealAlgebraicPoint& R);
    RealAlgebraicPoint conjoin (const RealAlgebraicNumber& N);
private:
    vector<RealAlgebraicNumberPtr> mNumbers;
    unsigned int mSize;
};

RealAlgebraicPoint::RealAlgebraicPoint(vector<RealAlgebraicNumberPtr>& v)
    : mNumbers(v), mSize(mNumbers.size()) {}
RealAlgebraicPoint::RealAlgebraicPoint(RealAlgebraicPoint& R)
    : mNumbers(R.mNumbers), mSize(mNumbers.size()) {}
RealAlgebraicPoint RealAlgebraicPoint::conjoin (const RealAlgebraicNumber& N)
{
    vector<RealAlgebraicNumberPtr> v;
    // do something fancy with v!
    return RealAlgebraicPoint(v); // this is line 58
}

RealAlgebraicPoint.cpp: In member function 'GiNaC::RealAlgebraicPoint GiNaC::RealAlgebraicPoint::conjoin(const GiNaC::RealAlgebraicNumber&)':
RealAlgebraicPoint.cpp:58:32: error: no matching function for call to 'GiNaC::RealAlgebraicPoint::RealAlgebraicPoint(GiNaC::RealAlgebraicPoint)'
RealAlgebraicPoint.cpp:46:1: note: candidates are: GiNaC::RealAlgebraicPoint::RealAlgebraicPoint(GiNaC::RealAlgebraicPoint&)
RealAlgebraicPoint.cpp:42:1: note: GiNaC::RealAlgebraicPoint::RealAlgebraicPoint(std::vector<std::tr1::shared_ptr<GiNaC::RealAlgebraicNumber> >&)
RealAlgebraicPoint.cpp:38:1: note: GiNaC::RealAlgebraicPoint::RealAlgebraicPoint(unsigned int&)

realagebraicpoint:：realagebraicpoint（向量&v）
：mNumbers（v），mSize（mNumbers.size（））{
RealAlgebraicPoint:：RealAlgebraicPoint（RealAlgebraicPoint&R）
：mNumbers（R.mNumbers），mSize（mNumbers.size（））{}
realagebraicpoint realagebraicpoint:：conjoin（const realagebraicnumber&N）
{
向量v；
//用v做些有趣的事！
返回RealAlgebraicPoint（v）；//这是第58行
}

不幸的是，我犯了这样的错误：

class RealAlgebraicPoint
{
public:
    RealAlgebraicPoint (vector<RealAlgebraicNumberPtr>& v);
    RealAlgebraicPoint (RealAlgebraicPoint& R);
    RealAlgebraicPoint conjoin (const RealAlgebraicNumber& N);
private:
    vector<RealAlgebraicNumberPtr> mNumbers;
    unsigned int mSize;
};

RealAlgebraicPoint::RealAlgebraicPoint(vector<RealAlgebraicNumberPtr>& v)
    : mNumbers(v), mSize(mNumbers.size()) {}
RealAlgebraicPoint::RealAlgebraicPoint(RealAlgebraicPoint& R)
    : mNumbers(R.mNumbers), mSize(mNumbers.size()) {}
RealAlgebraicPoint RealAlgebraicPoint::conjoin (const RealAlgebraicNumber& N)
{
    vector<RealAlgebraicNumberPtr> v;
    // do something fancy with v!
    return RealAlgebraicPoint(v); // this is line 58
}

RealAlgebraicPoint.cpp: In member function 'GiNaC::RealAlgebraicPoint GiNaC::RealAlgebraicPoint::conjoin(const GiNaC::RealAlgebraicNumber&)':
RealAlgebraicPoint.cpp:58:32: error: no matching function for call to 'GiNaC::RealAlgebraicPoint::RealAlgebraicPoint(GiNaC::RealAlgebraicPoint)'
RealAlgebraicPoint.cpp:46:1: note: candidates are: GiNaC::RealAlgebraicPoint::RealAlgebraicPoint(GiNaC::RealAlgebraicPoint&)
RealAlgebraicPoint.cpp:42:1: note: GiNaC::RealAlgebraicPoint::RealAlgebraicPoint(std::vector<std::tr1::shared_ptr<GiNaC::RealAlgebraicNumber> >&)
RealAlgebraicPoint.cpp:38:1: note: GiNaC::RealAlgebraicPoint::RealAlgebraicPoint(unsigned int&)

realagebraicpoint.cpp:在成员函数“GiNaC:：realagebraicpoint GiNaC:：realagebraicpoint:：conjoin（const GiNaC:：realagebraicnumber&）”中：
RealAlgebraicPoint.cpp:58:32:错误：调用“GiNaC:：RealAlgebraicPoint:：RealAlgebraicPoint（GiNaC:：RealAlgebraicPoint）”时没有匹配的函数
cpp:46:1：注：候选对象是：GiNaC:：RealAlgebraicPoint:：RealAlgebraicPoint（GiNaC:：RealAlgebraicPoint&）
cpp:42:1:注：GiNaC:：RealAlgebraicPoint:：RealAlgebraicPoint（std:：vector&）
realagebraicpoint.cpp:38:1:注意：GiNaC:：realagebraicpoint:：realagebraicpoint（unsigned int&）

有什么想法吗？我真的很理解为什么他试图调用

realagebraicpoint（GiNaC:：realagebraicpoint）

，因为我只调用

realagebraicpoint（std:：vector&）

谢谢大家!

---

Joachim

复制构造函数应该引用const。

这对我来说很好。发布你的include和using语句。应该这样做，但这无关紧要。不是答案。@AndreasHaferburg:这是相关的。函数试图返回一个临时函数的副本，这只有在副本构造函数引用const时才可能发生。@AndreasHaferburg这是相关的，因为编译器错误消息抱怨无法调用副本构造函数。由于复制构造函数是公共的，所以它不能调用它的唯一（或至少最可能）原因是因为复制构造函数采用非常量引用（因此不能使用临时构造函数调用）。