std :: shared_ptr和boost :: shared_ptr的区别

Question

I've the following code:

// interface.h
#ifndef INTERFACE_H
#define INTERFACE_H    

#include <memory>    
class IInterface {
public:
    virtual ~IInterface() = 0;
    virtual void doSomething() = 0;
};
inline IInterface::~IInterface() {}

typedef std::shared_ptr< IInterface > IIntPtr;    
IIntPtr makeInterface();    
#endif // INTERFACE_H


// impl.cpp
#include "interface.h"

class Interface : public IInterface { public:
    Interface() {}
    ~Interface() {}
    void doSomething() {} };

IIntPtr makeInterface() { return IIntPtr( new Interface() ); }

// main.cpp
#include "interface.h"
using namespace std;

int main()
{
    auto p = makeInterface();
    p->doSomething();
}

Now: if i use typedef std::shared_ptr< IInterface > IIntPtr; all is fine, but if I use typedef boost::shared_ptr< IInterface > IIntPtr; I've some compiler error:

• Compiler Error C2027: A type cannot be used until it is defined. To resolve the error, be sure the type is fully defined before referencing it.
• Compiler Error C2079: 'identifier' uses undefined class/struct/union 'name'
• Compiler Error C2440: The compiler cannot cast from 'type1' to 'type2'.

I'm using msvc10, but the code must compile with msvc9.0 so I have to use Boos.SmartPtr

Am I missing something?

Answer 1

OP在评论中回答了他自己的问题：在尝试Boost版本时，他忘记了#include <boost/shared_ptr.hpp> 。