[Dev-C++] C++ Virtual function Tables and Implementation

[<eng...@ju...>]

Greetings,


I would like to know if the C++ standard specifys how the virtual fucntion tables are to implemented by the compiler writers? Also can any tell me if other languages besides Borland C++ and Borland Delphi have compatible object binaries?

Example Code:

  class InternetConnection { 
public: 
............virtual int iconnect(...) =0; //Pure Virtual Method
};
class DSLConnection : public InternetConnection {
public:
............virtual int iconnect(...); //definition not shown
}; 
class ISDNConnection : public InternetConnection {
public:
............virtual int iconnect(...); //definition not shown
} 
class DailupConnection : public InternetConnection {
public:
............. virtual int iconnect(...); //definition not shown
};
//////////////////////////////////////////////////////////////////////
////This class is not derived from InternetConnection
//////////////////////////////////////////////////////////////////////
class ExportedConnection {
public:
.........virtual int iconnect(...); //definition not shown
};

InternetConnection can point to a pointer of type ExportedConnection and execute the virtual functions of that class object. Are there any other languages that are compatible besides Borland Delphi and Borland C++? I'm aware that this works also on Unix with C++. 

Thanks,

Jim E. Smith


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