[boost] Re: Review request: enable_if

From: Jaakko Jarvi (jajarvi_at_[hidden])
Date: 2003-07-16 03:10:39

In our last exciting episode Markus Werle wrote:
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> Mail-Copies-To: numerical.simulation_at_[hidden]
> User-Agent: KNode/0.6.1

> Jaakko Jarvi wrote code that looks like this:

>   template <bool B, class T = void>
>   struct disable_if: public enable_if< !B, T> {};

> I have a question regarding compile time:
> Do you have experience about whether this elegant solution
> might have some compile time penalty due to inheritance?
> Or is this faster than doubling the code?

We have made no measurements. The use of inheritance is motivated by getting
a miniscule bit of reuse.
If another formulation leads to better compile-time or runtime
performance, it's worth while to change.

  Cheers, Jaakko