Re: [boost] Re: Hello MPL world!

From: Greg Colvin (Gregory.Colvin_at_[hidden])
Date: 2003-01-07 12:22:59

At 05:09 PM 1/6/2003, David B. Held wrote:
>"David Abrahams" <dave_at_[hidden]> wrote in message
>news:u7kdhkfdj.fsf_at_boost-consulting.com...
>> Howard Hinnant <hinnant_at_[hidden]> writes:
>>
>> OK, I see your point.  How about:
>>
>>   template <class T>
>>   struct my_container
>>      : if_<
>>           and_<
>>                is_pointer<T>
>>              , is_POD<remove_pointer<T> >
>>           >
>>           , impl1
>>           , impl2
>>        >::type
>>   {
>>      ...
>>   };
>
>I think if you provided a copy c'tor that called memcpy() for
>impl1, or some other POD optimization, that would motivate the
>example for people who might be a little slow on the uptake
>(like I am sometimes!).  Otherwise, it seems like a decent
>introduction.  You might even be a little suggestive and call it
>my_vector, to imply that you are creating a POD-optimized
>vector (which people should be able to relate to easily enough).

I like this suggestion a lot.  A simple, useful example that
can't easily be done without something like MPL.