Re: [Boost-users] [variant] Efficiency

there is great disadvantage of variant in performance terms. One can't create instance of variant with proper type inside without calling copy costructor. Even if you want to create default constructed instance of a class, you need to call copy costructor. It's very bad for complex classes. On Sat, Apr 4, 2009 at 8:21 PM, Olivier Tournaire wrote:

Thank you Steven,

On Sat, Apr 4, 2009 at 4:41 PM, Steven Watanabe wrote:

...

AMDG The cost is apply_visitor is approximately that of a switch statement.

Suppose I have 2 variant. Is there something to help implementing a dispatcher ?

Regards,

Oivier

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