From: Ullrich Koethe (koethe_at_[hidden])
Date: 2006-10-17 17:23:16
David Greene wrote:
>Because that's what the C++ standard says (AFAIR).
> But the standard isn't always the best answer for all promotion
> situations. For example, some years back I wrote some expression
> template code for simulation purposes. I wanted a simple user
> interface so I promoted int / int to double to avoid loss of
Right. So VIGRA supports two promotions standard Promote (what the
compiler does by default) and RealPromote (the floating point promotion is
> Stuffed away in some cobweb-infested dusty disk sector I have a
> library that implements promotion "strategies" using a table-driven
> configuration of (operator/operand type -> promotion type) rules.
That's how VIGRA's promotion traits essentially work.
> I'll see if I can dig it out and post it as a starting point. I'm
> not sure if it's what we want as a Boost library but it might be a
> start for discussion.
Will be interesting to look at.
-- ________________________________________________________________ | | | Ullrich Koethe Universitaet Hamburg / University of Hamburg | | FB Informatik / Dept. of Informatics | | AB Kognitive Systeme / Cognitive Systems Group | | | | Phone: +49 (0)40 42883-2573 Vogt-Koelln-Str. 30 | | Fax: +49 (0)40 42883-2572 D - 22527 Hamburg | | Email: u.koethe_at_[hidden] Germany | | koethe_at_[hidden] | | WWW: http://kogs-www.informatik.uni-hamburg.de/~koethe/ | |________________________________________________________________|
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