Re: [boost] [cpo-proposal] presentation of the idea

Subject: Re: [boost] [cpo-proposal] presentation of the idea
From: Thorsten Ottosen (thorsten.ottosen_at_[hidden])
Date: 2013-08-19 09:12:40

On 19-08-2013 14:54, Larry Evans wrote:
> On 08/19/13 06:59, Thorsten Ottosen wrote:

>> That sounds like the basic idea. Alignment may not be needed if we
>> assume some kind of maximal alignment. Sizeof may not be needed either
>> if the syntax for adding objects is
>>
>>    cont.push_back<Derived>( x, y );
>>
>
> Using a templated push_back, IIUC, would require some sort of
> container, such as std::vector<char> cont, which contains contigous
> storage, and the push_back should find the next location, i_aligned,
> in std::vector<char> which is at alignment, alignof(Derived).
> and would then push_back i_aligned chars, then further push_back
> sizeof(Derived) char's, the new inplace at cont.begin()+i_aligned.
>
> Does that make sense?

Yes. And I think that very often i_aligned would be zero due to the 
internal padding in classes.

-Thorsten