Re: [boost] Interest in a "Heterogenous Container" system?

Subject: Re: [boost] Interest in a "Heterogenous Container" system?
From: Mathias Gaunard (mathias.gaunard_at_[hidden])
Date: 2009-06-29 07:51:17

Christian Schladetsch wrote:

> boost::variant doesnt support custom allocators. it uses naked new and
> delete.

variant stores objects within itself. If you declare a variant on the 
stack, your object lies on the stack.

The temporary heap backup is only there in operator= and only when you 
don't have a nothrow move or nothrow default constructor on one of your 
types.
And it's only used for a few instructions unless you throw anyway, so 
who cares about what allocator it uses.

Alternatively, it could also store the backup in the object itself to 
avoid heap allocations, but that would double its size.