#include<iostream>
using namespace std;

struct A
{
 int a;
};

struct B1:public A
{
 int a;
 B1(){a=1;A::a=11;}
};

struct B2:public A
{
 int a;
 B2(){a=2;A::a=22;}
};

struct C :public B1,public B2
{
  void foo()
  {
    cout<<C::B1::A::a; //ambiguous, vc8 is ok, 11
    cout<<C::B2::A::a; //ambiguous, vc8 is ok, 22
    cout<<C::B1::a;    //ok. 1
    cout<<C::B2::a;    //ok. 2
  }
};

why many compiler(g++/comeau/ICC) I test occurs
ambiguity ? Only vc8 compiler can work.

the access style(C::B1::A::a or C::B2::A::a) fits
people's intuition.

I want to know if the part of ambiguity conforms to
ISO C++ Standard.


Thanks for your responce.

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