Re: [boost] type_with_alignment.hpp / alignment_of.hpp too heavy

Subject: Re: [boost] type_with_alignment.hpp / alignment_of.hpp too heavy
From: Andrey Semashev (andrey.semashev_at_[hidden])
Date: 2008-10-01 12:23:33

Emil Dotchevski wrote:
> I need to allocate an object of type T, but I also need to bundle it
> in a single memory allocation with an object of class U. Something
> like "new std::pair<T,U>" would work, except that U is a rather heavy
> type and I want to pimpl it away into a cpp.
> 
> This means that the cpp needs to deal with the alignment of T and U
> when allocating the memory. For that purpose, I could use
> type_traits/type_with_alignment.hpp in my header, but when I looked at
> it, I was blown away by how much crap it includes (remember, I want my
> header to be very very light.)

Sorry if I'm missing something, but why would you need to include these
headers in your header? Just forward-declare your internal pimpl class
and define it in cpp. It is cpp where you would include
type_with_alignment.hpp & co. and this is not that critical, is it?