[aspectc-user] Defining structure inside advice code

[Bartosz Blimke]

Hi,

C++ doesn't allow to have nested definition of functions,
thats mean it will not allow to make definition like this.


int func1()
{
 int func2()
 {
   return 5;
 }

 return func2();
}

Simple solution for this problem is to pack the nested
function into structure

int func1()
{
 struct aa
 {
   int func2()
   {
     return 5;
   }
 } simpleStructInstance;

 return simpleStructInstance.func2();
}

C++ compiler compiles it without problems.

Problem is with ac++ advice code:

//main.cpp
#include <stdio.h>


void func () {

   printf ("func\n");
}


int main (int argc, char * argv[]) {
   func ();
   return 0;
}
//end of main.cpp

aspect Aspect {

    pointcut methods() = execution("% func()");


    advice methods() : before()
    {
      struct simpleStruct{
	int methodOfStruct()
        {
	  return 0;
	}
      } instance;

      instance.methodOfStruct();
    }

};

Linking...
main.obj : error LNK2005: "public: int __thiscall `public: void __thiscall
Aspect::__a0_before(void)'::`2'::simpleStruct::methodOfStruct(void)"
(?methodOfStruct at simpleStruct@?1??__a0_before at Aspect@@QAEXXZ at QAEHXZ)
already defined in TestAspectProject_LinkOnce.obj
Debug\TestAspectProject.exe : fatal error LNK1169: one or more multiply
defined symbols found


The same problem is with after().
When I use around() problem is only if I use tjp->proceed()
inside the body of advice code.

If the structure is defined inside aspect body but outside the
advice body problem dissapear.

Is it another problem linked to vc++ compiler, or ac++ bug ?


Greets,

Bartosz Blimke