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Subject: Re: [boost] Boost.Algorithm design question
From: Peter Dimov (pdimov_at_[hidden])
Date: 2011-10-31 07:12:59

Dave Abrahams wrote:
> I think you're missing the point, which is:
> When the specification for an algorithm exposes the actual expressions
> used in a given implementation of an algorithm, it tends to lock down
> the implementation in ways that don't necessarily make sense (and can
> prevent optimizations). Tiny details that one usually doesn't
> consider, like whether part of the expression is an lvalue or an
> rvalue, const or non-const, become encoded into the specification of
> the algorithm.

None of this has anything to do with the fact that you want to require
operator== to be an equivalence relation, and it doesn't have to be.

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