Re: [boost] Boost.Optional advantages

From: Peter Dimov (pdimov_at_[hidden])
Date: 2005-07-11 16:46:33

David Abrahams wrote:
> Andrey Melnikov <melnikov_at_[hidden]> writes:
>
>> David Abrahams wrote:
>>> Andrey Melnikov <melnikov_at_[hidden]> writes:
>>>
>>>> char bar_placeholder[sizeof(std::string];
>>>> std::string *bar = reinterpret_cast<std::string*>(bar_placeholder);
>>>
>>>
>>> reinterpret_cast is nonportable.
>>
>> Why? I don't see any reasons why reinterpert_cast from char [] to
>> std::string * could be nonportable.
>
> The standard says so.  It's implementation-defined.

I know that this is your favorite, but in my opinion, "implementation 
defined" doesn't equal "nonportable" in this particular case. (Alignment 
problems notwithstanding.)