Re: compilation error

From:
"Victor Bazarov" <v.Abazarov@comAcast.net>
Newsgroups:
comp.lang.c++
Date:
Tue, 4 Dec 2007 13:25:50 -0500
Message-ID:
<fj463f$ng$1@news.datemas.de>
Rahul wrote:

I get the error on the following code,


Next time please say _where_ in the code you get the error.

error C2027: use of undefined type 'B'

class AA
{
public: operator B()
           {
             B obj;


In order for the compiler to correctly emit the code, it has
to know what 'B' is. Since the definition of 'B' has not been
encountered by the compiler at this point, the code is ill-formed.

  printf("in B\n");
              return obj;
           }
};

class B
{
public: operator AA()
           {
             AA obj;
  printf("in AA\n");
             return obj;
           }
};


To correctly resolve such "circular references", pull the definitions
of the member functions _out_ of the classes and place them _after_
both classes.

int main()
{
AA obj;
B b_obj;
obj = b_obj;
b_obj = obj;
return(0);
}

Thanks in advance!!!


V
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