Re: [boost] aligned_storage in unions

Subject: Re: [boost] aligned_storage in unions
From: Mathias Gaunard (mathias.gaunard_at_[hidden])
Date: 2010-09-22 14:46:42

On 22/09/2010 18:35, Larry Evans wrote:
> How would C++0x avoid the problem?

By allowing to put non-PODs in unions.

> Could you point to the variant code violating this rule?

aligned_storage<whatever>::type is a POD type of a certain type T.
In order to read and write any of the object a variant can hold, it will 
need to reinterpret cast from a pointer to that object to a pointer to 
any of these object types, that are not necessarily the same as T.