Re: [Boost-users] Pointer containers and raw arrays of pointers

From: Chris Newbold (Chris.Newbold_at_[hidden])
Date: 2007-07-17 09:52:35

On Mon, 16 Jul 2007 17:38:13 +0200, Thorsten Ottosen wrote:

> Well, it's ugly, but you can do something along
> 
> reinterpret_cast<OldStuff**>( &*output.begin().base() )

Thanks for the reply. Is this guaranteed to work (at least in the case of 
ptr_vector)? I recall seeing a comment you made in the context of a 
discussion about the defunct ptr_begin(), etc. family of functions that 
there was no reliable, portable cast from void* to T* and that the 
pointer containers were now using void* storage.

If you know that a T* went into a given void*, I've always figured that 
reinterpret_cast<T*> would get it back out again. Am I missing something?

-Chris