Fwd: Re: [Patch] Remove workaround for copy_backward

[Douglas Gregor <gregod at cs dot rpi dot edu>]

Forgot the echo the list...

--- Begin Message ---

• From: Douglas Gregor <gregod at cs dot rpi dot edu>
• To: Gabriel Dos Reis <gdr at integrable-solutions dot net>
• Date: Sat, 27 Sep 2003 14:03:16 -0400
• Subject: Re: [Patch] Remove workaround for copy_backward
• Organization: Rensselaer Polytechnic Institute
• References: <3F75BC34.2050604@unitus.it> <3F75C858.4000108@unitus.it> <m34qyyxh2w.fsf@uniton.integrable-solutions.net>

On Saturday 27 September 2003 01:43 pm, Gabriel Dos Reis wrote:
> | Anyway, if this is the way to go (by the way, are you deadly sure that
> | our beloved compiler ;) is able to generate code equally efficient in
> | the two cases?)
>
> Basically, what is happening is that the last argument (either a
> __true_type or a __false_type) which we know is a compile-time
> constant is "shifted" into an explicit template argument for the class
> dispatcher, so one uses less function arguments or registers.

Has anyone considered replacing the dispatching mechanism with one based on 
enable_if? That would eliminate the need for multiple levels of indirection 
(__copy, __copy_aux, __copy_aux2, etc.).

	Doug

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