C++异常处理的警告

[Jagen在路上]

我最近写了一个类，利用了C++异常，并且另外继承了exception类CException，但是我没一个利用throw(CException)的成员函数在编译的时候都会发出警告:C4290:忽略C++异常规范，但指示函数不是__declspec(nothrow)。这是什么警告，什么原因引起的阿？我用的是VC7.1
代码如下：
using std::string;
using std::exception;
class CException :
public exception
{
protected:
string Method; //方法,异常的发出者
string Message; //错误消息
int Code; //错误代码
public:
CException( const string &s_Method, const string &s_Message, int n_code ) throw();
virtual ~CException( void ) throw();

const string& GetMethod( void ) const throw() { return Method; }
const string& GetMessage( void ) const throw() { return Message; }
const int GetCode( void ) const throw() { return Code; }
virtual const char* What( void ) const throw() { return GetMessage().c_str(); }
};
namespace JJunMethodName
{
const string NETINIT = "CSocket::init()";
const string NETDEINIT = "CSocket::deinit()";
}
namespace JJunErrorMessage
{
const string MSGNETINIT = "Winsock初始化时发生错误";
const string MSGNETDEINIT = "释放Winsock时发生错误";
}




class CSocket
{
private:
SOCKET m_hSocket;
//构造
public:
explicit CSocket(void) throw();
//属性
public:
//方法
public:
//执行
public:
~CSocket(void) throw();
//全局
public:
static void Init() throw(CException); //初始化Socket
static void Deinit() throw(CException); //注销Socket
};

[byf2002]

Compiler Warning (level 3) C4290
C++ Exception Specification ignored

A function was declared using exception specification.

At this time the implementation details of exception specification have not been standardized, and are accepted but not implemented in Microsoft Visual C++.

Code compiled with ignored exception specifications may need to be recompiled and linked to be reused in future versions supporting exception specifications.

You can avoid this warning by using the warning pragma:

#pragma warning( disable : 4290 )


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[Jagen在路上]

明白了！

[菜牛]

用throw关键字即可。这是C++异常处理和MFC异常处理的不同。

[Jagen在路上]

我这段代码是要跨平台的！