Re: [boost] [fusion] question

From: Joel de Guzman (joel_at_[hidden])
Date: 2006-05-07 21:29:06

Gennadiy Rozental wrote:
> I may not have time for review, but just one simple question: what are the 
> advantages/disadvantages/differences in usage with 
> stl_container<boost::variant>?

Hi,

Here's another compelling reason why you'd use tuples:

Try to implement Boost.Parameter or Boost.Bind or
Boost.Lambda using std::vector<variant>. You can't!
The types are unbounded. Variant can only deal with
bounded types.

 From the variant docs:
'''
A discriminated union container on some set of types is
defined by instantiating the boost::variant class template
with the desired types. These types are called *bounded types*
'''

emphasis mine.

But really, is this a review of tuples again? I think we are
comparing apples and oranges again. tuples and variants are
different tools for different tasks. Sure you can use a hammer
to drive a screw, but I'd rather use a screwdriver.

Regards,
-- 
Joel de Guzman
http://www.boost-consulting.com
http://spirit.sf.net