c++ - Clang 输出错误 "no matching construct for initialization"

Question

使用 clang-425.0.27(基于 LLVM3.2svn)编译此代码片段:

class CStorage
{};

typedef boost::shared_ptr< CStorage >  AccessorPtr;

class CTest
{
public:
  CTest( const CStorage &rAccessor )
    : m_Accessor( rAccessor ){}
private:
  AccessorPtr m_Accessor;
};

获取编译错误:

**error**: no matching constructor for initialization of 'AccessorPtr' (aka 'shared_ptr<CStorage>')
                        : m_Accessor( rAccessor ){}

**note**: candidate constructor (the implicit copy constructor) not viable: no known conversion from
      'const FNPNS::TSM::CDirectBlockAccessor' to 'const boost::shared_ptr<FNPNS::TSM::CDirectBlockAccessor>' for 1st argument
template<class T> class shared_ptr

Answer 1

boost::shared_ptr 构造函数需要一个指针，您要向它传递一个引用。您可能想更改自己的构造函数以也采用指针，或者使用引用在堆上创建一个新的 CStorage 对象。