Re: Nested class accessing private member of parent

Pavel Minaev wrote:

> On 10 ???, 07:26, sat_a...@[EMAIL PROTECTED]
 wrote:
>> In the following  code, nested class B is accessing private member of
>> A. Is this allowed? This code compiles on Comeau online test compiler
>> and Visual Studio 2005.
>>
>> class A
>>
>> {
>>     class B
>>    {
>>        A* a;
>>        int bVal;
>>        B() { bVal = a->aVal; } // This compiles
>>     };
>>
>> private:
>>
>>     int aVal;
>>
>> };
> 
> No, this is not allowed. I can't say anything about Comeau, but it is
> a well-known extension in Visual C++. To be standard-compliant, you
> need an explicit friend declaration for the innter class in the outer
> class.

Actually, it used to be not allowed, but the standard got changed such
that nested cl***** (and their members) have the same access rights as
the members of the outer class. See Core Language issues 45 and 494
(http://www.open-std.org/jtc1/sc22/wg21/docs/cwg_defects.html)

The two compilers might already implement the new behaviour.

Bart v Ingen Schenau
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